5th IWHA Conference.Tampere Finland 2007. Pasts and Futures of Water. University of Tampere 13-17 June 2007

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Hautamäki, I. (ed.), Juuti, P. (ed.), Katko, T. (ed.), Rajala, R. (ed.), Vinnari, E. (ed.)
Publication date: 2007

Publication information

Publisher: Unknown Publisher
ISBN (Print): 978-951-44-6971-8
Original language: English

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14274

Research output: Book/ReportAnthologyScientificpeer-review

Accelerated deactivation studies of the natural-gas oxidation catalyst-Verifying the role of sulfur and elevated temperature in catalyst aging

Accelerated deactivation, caused by thermal aging (TA) and/or sulfur+water poisoning (SW), of the PtPd/γ-Al2O3 natural-gas oxidation catalyst was studied. Thermal aging and poisoning treatments were performed separately and with varied combinations and comprehensive characterization of the catalyst was carried out after each step. The fresh catalyst has small, oxidized PtPd particles (<5nm) uniformly distributed in the γ-alumina washcoat. After the SW-treatment, a small amount of bulk aluminum sulfate was observed near the slightly grown noble metal particles. During the thermal aging, γ-alumina changed to δ-/θ- and α-alumina. In addition, total decomposition of oxidized Pt and partly decomposition of oxidized Pd occurred resulting in the formation of the grown noble metal particles with a bimetallic PtPd core and a polycrystalline PdO shell. Also few, small (~5nm) bimetallic PtPd particles were still detected. In the TA+SW-treated catalyst with grown noble metal particles, a small amount of bulk aluminum sulfate was detected and it was randomly distributed over the noble metal particles and washcoat. The activity in the terms of methane conversion over the TA-, SW-, and SW+TA-treated catalysts was similar but it was decreased compared to the fresh catalyst. The activity of the TA+SW-treated catalyst was drastically decreased compared to the fresh catalyst due to significant morphological changes and aluminum sulfate formation.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Materials Science, Research group: Materials Characterization, University of Oulu, Aalto University, Chalmers University of Technology, Dinex Ecocat Oy
Contributors: Honkanen, M., Kärkkäinen, M., Kolli, T., Heikkinen, O., Viitanen, V., Zeng, L., Jiang, H., Kallinen, K., Huuhtanen, M., Keiski, R. L., Lahtinen, J., Olsson, E., Vippola, M.
Number of pages: 10
Pages: 439-448
Publication date: 2016
Peer-reviewed: Yes
Early online date: 1 Oct 2015

Publication information

Journal: Applied Catalysis B-Environmental
ISSN (Print): 0926-3373
Ratings: 
  • Scopus rating (2016): CiteScore 14.9 SJR 2.693 SNIP 2.208
Original language: English
ASJC Scopus subject areas: Catalysis, Process Chemistry and Technology, Environmental Science(all)
Keywords: Deactivation, Palladium, Platinum, Sulfur poisoning, Thermal aging
Electronic versions: 
URLs: 
Source: Scopus
Source ID: 84943638016

Research output: Contribution to journalArticleScientificpeer-review

Acceptability of contaminated soils and waste materials in landfill structures

General information

Publication status: Published
Organisations: Civil Engineering, Research group: Earth Constructions
Contributors: Leppänen, M. M., Kuula, P.
Publication date: 2016
Peer-reviewed: Unknown
Event: Paper presented at Nordrocs, .

Research output: Other conference contributionPaper, poster or abstractProfessional

Access to Water? Dynamic Capacity Change for Sustainable Rural Water and Sanitation Services for All

The lack of adequate safe drinking-water together with poor sanitation and hygiene imposes an extremely high disease burden on millions of children and adults. This compromises well-being and productivity, and aggravates the cycle of poverty. Cultivating capacity for change is an important element of practically every policy reform, development programme, and country strategy aiming to improve well-being of its citizens, and with it also, e.g., water services and sanitation. The purpose of this dissertation was to recommend ways for rural water and sanitation sector specific programmes and projects to inspire capacity change for continued learning, adaptation, and innovation in the face of ever-new challenges in a volatile and unpredictable local and global environment, while the system in itself was assumed to be complex and wicked already at the present time.

The specific objective was to develop futures-oriented frame of reference that can be applied for policy, programme, and project purposes. It draws from a wide range of action research the author has been involved with in Nepal, Guyana, Tanzania, and Bangladesh. It consists of six international peer-reviewed scientific articles and three case studies. The approach is constructivist and actororiented, it pays attention to agency and institutions, is plural rather than singular, differentiating rather than generalizing. The frame of reference is based on three analytical levels: 1) individual, 2) organizational/institutional, and 3) enabling environment.

Rural water sector must pay attention to rural livelihoods and cross-sectoral issues to truly benefit rural development and well-being. This can be done through the multiple-use water services paradigm, adding ecological sanitation. Two of the articles studied a bi-lateral water project in Nepal that combined water supply, sanitation, irrigation, and hydro-energy with livelihoods, small cottage industries and micro-finance (cooperatives) within one project operating through local government.Conceptually and policy-wise complex system translated into tangible benefits and positive impacts in the poorest and remotest corners of Nepal once the enabling environment was conducive to allow this. It proved out to be a useful instrument for making change happen, empowering communities and encouraging continuous learning, innovation, and adaptation. Empowerment is here defined as group’s or individuals’ capacity to make effective choices and then transform these choices into desired actions and outcomes and with these, into services and benefits.

Capacity related interventions need to have a vision that goes further than just the present state of affairs. Appreciating the complexity and dynamic nature of the rural water sector, the system should not be split into individual components or activities, such as individual training courses or narrow mandates that do not consider the broader framework within which they must operate and change.
The ‘capacity cube’ in this dissertation represents the ‘present’ that moves across its different dimensions simultaneously and is in constant change in time. Framing the ’cube’ allows the project or programme planners to establish the external layers of reference to give shape for the time dimension, the expected results (‘services’), the external and internal drivers and barriers to change in terms of enabling environment, and the institutions and humans therein. Among others, it recommended to further study scale application of multiple use water services with ecological sanitation in the livelihoods context and the rural water service delivery paradigm.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Civil Engineering
Contributors: Rautanen, S.
Number of pages: 112
Publication date: 18 Mar 2016

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3707-3
ISBN (Electronic): 978-952-15-3718-9
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1373
ISSN (Print): 1459-2045
Keywords: water, sanitation, rural, capacity, livelihoods, future, change
Electronic versions: 

Research output: Book/ReportDoctoral thesisCollection of Articles

Accidents and close call situations connected to the use of mobile phones

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Pääkkönen, R.
Pages: 75-82
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Accident Analysis and Prevention
Volume: 45
ISSN (Print): 0001-4575
Ratings: 
  • Scopus rating (2012): CiteScore 3.8 SJR 1.326 SNIP 2.258
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1<br/>Publisher name: Elsevier Ltd

Source: researchoutputwizard
Source ID: 4534

Research output: Contribution to journalArticleScientificpeer-review

Acetotrophic Activity Facilitates Methanogenesis from LCFA at Low Temperatures: Screening from Mesophilic Inocula

The inoculum source plays a crucial role in the anaerobic treatment of wastewaters. Lipids are present in various wastewaters and have a high methanogenic potential, but their hydrolysis results in the production of long chain fatty acids (LCFAs) that are inhibitory to anaerobic microorganisms. Screening of inoculum for the anaerobic treatment of LCFA-containing wastewaters has been performed at mesophilic and thermophilic conditions. However, an evaluation of inocula for producing methane from LCFA-containing wastewater has not yet been conducted at low temperatures and needs to be undertaken. In this study, three inocula (one granular sludge and two municipal digester sludges) were assessed for methane production from LCFA-containing synthetic dairy wastewater (SDW) at low temperatures (10 and 20°C). A methane yield (based on mL-CH4/g-CODadded) of 86-65% with acetate and 45-20% with SDW was achieved within 10 days using unacclimated granular sludge, whereas the municipal digester sludges produced methane only at 20°C but not at 10°C even after 200 days of incubation. The acetotrophic activity in the inoculum was found to be crucial for methane production from LCFA at low temperatures, highlighting the role of Methanosaeta (acetoclastic archaea) at low temperatures. The presence of bacterial taxa from the family Syntrophaceae (Syntrophus and uncultured taxa) in the inoculum was found to be important for methane production from SDW at 10°C. This study suggests the evaluation of acetotrophic activity and the initial microbial community characteristics by high-throughput amplicon sequencing for selecting the inoculum for producing methane at low temperatures (up to 10°C) from lipid-containing wastewaters.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy, Natl. University of Ireland, Galway
Contributors: Singh, S., Rinta-Kanto, J., Kettunen, R., Lens, P., Collins, G., Kokko, M., Rintala, J.
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: ARCHAEA
Volume: 2019
Article number: 1751783
ISSN (Print): 1472-3646
Ratings: 
  • Scopus rating (2019): CiteScore 5.4 SJR 1.188 SNIP 0.846
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Acid Leaching of Cu and Zn from a Smelter Slag with a Bacterial Consortium

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, CSIRO
Contributors: Tuovinen, O. H., Särkijärvi, S., Peuraniemi, E., Junnikkala, S., Puhakka, J. A., Kaksonen, A. H.
Number of pages: 4
Pages: 660-663
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Advanced Materials Research
Volume: 1130
ISSN (Print): 1022-6680
Ratings: 
  • Scopus rating (2015): CiteScore 0.08 SJR 0.115 SNIP 0.105
Original language: English

Bibliographical note

EXT="Kaksonen, Anna H."

Research output: Contribution to journalArticleScientificpeer-review

A comparison of occupational electric field exposures during working tasks at 400 kV and 110 kV substations

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Kuisti, H., Pääkkönen, R., Gobba, F.
Publication date: 2012

Host publication information

Title of host publication: Proceedings - 7th International Workshop on Biological Effects of Electromagnetic Fields, 7th IWSBEEMF, 8 - 12 October 2012, Valletta, Malta
Publisher: Electromagnetic Research Group - EMRG (Malta); Departmet of Physics, University of Malta
ISBN (Print): 978-99957-0-361-5

Publication series

Name: International Workshop on Biological Effects of Electromagnetic Fields

Bibliographical note

ei ut-numeroa 19.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: Electromagnetic Research Group - EMRG (Malta); Departmet of Physics, University of Malta

Source: researchoutputwizard
Source ID: 4532

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

A comparison of the usability of a laptop, communicator, and handheld computer

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Suomalainen, P., Korpinen, L., Pääkkönen, R.
Number of pages: 13
Pages: 111-123
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Journal of Usability Studies
Volume: 5
Issue number: 3
ISSN (Print): 1931-3357
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 9341

Research output: Contribution to journalArticleScientificpeer-review

Adaptation of Black Carbon Footprint concept would accelerate mitigation of global warming

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Physics, Research group: The Instrumentation, Emissions, and Atmospheric Aerosols Group, Industrial Engineering and Management, Research group: Cost Management Center, Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy, Atmospheric Composition Research, Finnish Meteorological Institute, Tampere University, Servicio Meteorológico Nacional, VTT Technical Research Centre of Finland, Helsinki Region Environmental Services Authority (HSY), Department of Environmental Sciences, Helsinki University, Helsinki Region Environmental Services Authority HSY, Helsinki Region Environmental Services Authority, Helsinki Region Environmental Services Authority (HSY), Finnish Environment Institute, University of Eastern Finland, Finnish Meteorological Institute, Helsinki, Airmodus Oy, Centro Mario Molina Chile, Lund University, Aristotle University of Thessaloniki, Universidad de Chile
Contributors: Timonen, H., Karjalainen, P., Aalto, P., Saarikoski, S., Mylläri, F., Karvosenoja, N., Jalava, P., Asmi, E., Aakko-Saksa, P., Saukkonen, N., Laine, T., Saarnio, K., Niemelä, N., Enroth, J., Väkevä, M., Oyola, P., Pagels, J., Ntzachristos, L., Cordero, R., Kuittinen, N., Niemi, J. V., Rönkkö, T.
Pages: 12153-12155
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: Environmental Science and Technology
Volume: 53
Issue number: 21
ISSN (Print): 0013-936X
Ratings: 
  • Scopus rating (2019): CiteScore 12.6 SJR 2.704 SNIP 2.06
Original language: English

Bibliographical note

DUPL=50894228
Merkitty Julk0000 Virta-siirtoa varten

Research output: Contribution to journalArticleScientificpeer-review

A decade of Finnish engineering education for sustainable development

Purpose

The paper aims to examine the current status and development of sustainable development in Finnish engineering education.
Design/methodology/approach

The study consists of interviews with key stakeholders supplemented with the analysis of documented material. Development is discussed in relation to the findings of collaborative strategy process in the year 2009.
Findings

The paper observes that the Finnish universities providing engineering education are committed to sustainable development in their strategies. However, a lot of work remains to be done before the strategies are implemented and sustainable development is integrated to all degree programs. Explicit knowledge and individual learning in clearly defined disciplinary boundaries have been the main focus of engineering education.
Practical implications

The paper suggests that engineers need to be provided with mental tools to cope with uncertainty, complexity and ambiguity. Key competencies include holistic understanding, communication and collaboration skills, ability and willingness for critical and reflective thinking, creativity, innovativeness and entrepreneurship. Thus, collaborative learning, open dialogue and innovation are at the heart of education for sustainable development.
Originality/value

This paper has a relatively wide approach as it analyses sustainable development in the context of Finnish engineering education both on institutional and societal levels and is based on a national project.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Keva
Contributors: Takala, A., Korhonen-Yrjänheikki, K.
Pages: 170-186
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: INTERNATIONAL JOURNAL OF SUSTAINABILITY IN HIGHER EDUCATION
Volume: 20
Issue number: 1
ISSN (Print): 1467-6370
Ratings: 
  • Scopus rating (2019): CiteScore 3.2 SJR 0.635 SNIP 1.329
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Adjoint-based optimization in the development of low-emission industrial boilers

A gradient-based method has been developed and programmed to optimize the NH (Formula presented.) injections of an existing biomass-fired bubbling fluidized bed boiler, the targets being to minimize both the NO and the NH (Formula presented.) emissions. In this context, the reactive flow inside the boiler is modelled using a custom-built OpenFOAM (Formula presented.) solver, and then the NO and NH (Formula presented.) species are calculated using a post-processing technique. The multiobjective optimization problem is solved by optimizing several weight combinations of the objectives using the gradient-projection method. The required sensitivities were calculated by differentiating the post-processing solver according to the discrete adjoint method. The adjoint-based sensitivities are validated against finite differences calculations. Moreover, in order to evaluate the optimization results, the optimization problem is solved using evolutionary algorithms software. Finally, the optimization results are physically interpreted and the strengths and weaknesses of the proposed method are discussed.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy
Contributors: Kanellis, G., Oksanen, A., Konttinen, J.
Number of pages: 21
Publication date: 2020
Peer-reviewed: Yes

Publication information

Journal: Engineering Optimization
ISSN (Print): 0305-215X
Original language: English
ASJC Scopus subject areas: Computer Science Applications, Control and Optimization, Management Science and Operations Research, Industrial and Manufacturing Engineering, Applied Mathematics
Keywords: adjoint, boiler, CFD, emissions, optimization
Electronic versions: 
Source: Scopus
Source ID: 85088050023

Research output: Contribution to journalArticleScientificpeer-review

Adjustable hydrophilicity and hydrophobicity on paperboard by liquid flame spray process

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering, Department of Physics
Contributors: Stepien, M., Saarinen, J. J., Teisala, H., Tuominen, M., Aromaa, M., Kuusipalo, J., Mäkelä, J., Toivakka, M.
Pages: 6 p
Publication date: 2010

Host publication information

Title of host publication: 2010 TAPPI Advanced Coating Fundamentals Symposium, October 11-13, 2010, Munich, Germany

Bibliographical note

Contribution: organisation=epr pap,FACT1=0.5<br/>Contribution: organisation=fys,FACT2=0.5

Source: researchoutputwizard
Source ID: 9324

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Adjustable wettability of paperboard by liquid flame spray nanoparticle deposition

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research area: Aerosol Physics, Department of Energy and Process Engineering, Department of Physics, Engineering materials science and solutions (EMASS)
Contributors: Stepien, M., Saarinen, J. J., Teisala, H., Tuominen, M., Aromaa, M., Kuusipalo, J., Mäkelä, J. M., Toivakka, M.
Pages: 1911-1917
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: Applied Surface Science
Volume: 257
Issue number: 6
ISSN (Print): 0169-4332
Ratings: 
  • Scopus rating (2011): CiteScore 3.4 SJR 0.908 SNIP 1.379
Original language: English

Bibliographical note

Contribution: organisation=epr pap,FACT1=0.5<br/>Contribution: organisation=fys,FACT2=0.5<br/>Publisher name: Elsevier

Source: researchoutputwizard
Source ID: 7308

Research output: Contribution to journalArticleScientificpeer-review

ADM1 Based Mathematical Models For Assessing The Effect Of Trace Elements Dynamics On Solid Waste Anaerobic Digestion

Anaerobic digestion (AD) is one of the most trace element (TE) rich metabolic processes in biology. Indeed, TEs are important structural components of various enzymes in the AD process. The role and fate of TEs (Fe, Ni and Co) in AD is poorly understood due to their complex biogeochemistry. The low detection limit of analytical instruments and the time consuming and challenging nature of the experimental procedures are major obstacles to the quantification of TEs in AD. In this thesis, three separate mathematical models based ADM1 have been developed to simulate the TEs dynamics and speciation pattern in an AD reactor. In particular, a TE precipitation/dissolution model, a TE complexation model and a TE adsorption model have been progressively developed to predict the effect, role and fate of TEs in an AD batch system. In all the models the extent of microbial activity in the AD process is a function of the free TE concentration in the liquid phase, which is in equilibrium with the physicochemistry of the AD reactor. The precipitation/dissolution model considers the interactions of TEs with inorganic carbon (e.g. HCO3- and CO32-), phosphorous (e.g. PO43-, HPO42-, H2PO4-) and sulfur (e.g. HS- and S2-) components. New chemical equilibrium acid-base and precipitation reactions have been implemented to study the interactions of Fe, Ni, Co with carbonate, phosphate and sulfide components. The effects of deficiency, stimulation, inhibition and toxicity of TEs on microbial activity have been modelled based on a hormesis type TE dose-response inhibition function. The microbial uptake of TE and the TE inhibition on special microbial activities have been defined as well. Release of TEs as a disintegration product has been also considered to account for the TE content of the organic substrate. Model scenarios have been simulated to analyze the dynamics of TEs, starvation of TEs and the effect of initial sulfur-phosphorus ratio. In the complexation model, the interactions of TEs with organic chelators have been predicted. TE complexation reactions with VFAs and EDTA have been incorporated in the extended ADM1 model in addition to TE precipitation/dissolution processes. New acid-base chemical equilibrium reactions have been incorporated to model the dynamics of EDTA species. Complexation process rates have been defined as well. The model is able to quantify the effect of EDTA/VFA -TE complexation on methane production. Further, effect of initial Ca and Mg concentration on TE complexation has been predicted in a separate modelling scenario. Finally, a general framework able to take into account the precipitation/dissolution and complexation reactions, as well as the interaction of TEs with various surfaces available in the AD system has been developed. The model tracks the TEs dynamics in a batch anaerobic digester and as an extension of the previous contributions, incorporates the adsorption reactions of TEs with biomass, inert and precipitate (FeS). The concepts of free and occupied binding sites, and binding site density for the various surfaces have been incorporated into the model. Simulation scenarios were able to predict the effect of various organic matter concentrations, initial TE concentrations, initial Ca-Mg concentrations, initial EDTA concentrations and change in TE binding site density for biomass, inert and precipitate on cumulative methane production and TE speciation.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Materials Science and Environmental Engineering
Contributors: Maharaj, B.
Number of pages: 73
Publication date: 10 Dec 2019

Publication information

Publisher: Tampere University
Original language: English
URLs: 

Research output: Book/ReportDoctoral thesisCollection of Articles

Airtightness of residential buildings in Finland

Single-family buildings and apartments in multi-family apartment buildings have been studied in Finland in two large-scale studies between the years 2002 and 2009. This paper is based on the measurements of airtightness of 170 single-family detached houses and 56 apartments by fan pressurisation method at 50 Pa.The mean air change rate of 10 autoclaved aerated concrete block, 10 shuttering concrete block, 10 concrete element, 10 brick masonry, 10 lightweight aggregate concrete block, 100 timber-framed, and 20 log single-family houses was 1.5 h<sup>-1</sup>, 1.6 h<sup>-1</sup>, 2.6 h<sup>-1</sup>, 2.8 h<sup>-1</sup>, 3.2 h<sup>-1</sup>, 3.9 h<sup>-1</sup> and 6.0 h<sup>-1</sup>, respectively. In concrete-built multi-storey houses, in which the intermediate floor was cast on site, the mean n<inf>50</inf>-value of 23 apartments was 0.7 h<sup>-1</sup>. The mean n<inf>50</inf>-value of 20 apartments in multi-storey houses built from concrete elements was 1.6 h<sup>-1</sup>. 16 apartments in timber-framed multi-storey houses had a mean n<inf>50</inf>-value 2.9 h<sup>-1</sup>.Factors like construction method and insulation material (polyurethane insulation) in timber-framed houses, seam insulation material in log houses and ceiling structure in heavyweight buildings among others were found to have an effect on the average values of air change rates. The mean values of airtightness do not satisfy the recommended level of airtightness in Finland. Most important result, however, is that good airtightness of individual houses was reached within all house groups regardless of the choice of structure, storeys, ventilation system or technology of construction.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Life Cycle Effectiveness of the Built Environment (LCE@BE), Aalto University, Department of Civil and Structural Engineering
Contributors: Vinha, J., Manelius, E., Korpi, M., Salminen, K., Kurnitski, J., Kiviste, M., Laukkarinen, A.
Number of pages: 13
Pages: 128-140
Publication date: 1 Nov 2015
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 93
Issue number: P2
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2015): CiteScore 6.9 SJR 2.067 SNIP 2.498
Original language: English
ASJC Scopus subject areas: Civil and Structural Engineering, Environmental Engineering, Geography, Planning and Development, Building and Construction
Keywords: Air change rate, Air leakage, Airtightness, Residential buildings
Electronic versions: 
URLs: 
Source: Scopus
Source ID: 84938085676

Research output: Contribution to journalArticleScientificpeer-review

A laboratory listening experiment on subjective and objective rating of impact sound insulation of concrete floors

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Acoustics, Turku University of Applied Sciences
Contributors: Kylliäinen, M., Hongisto, V., Oliva, D., Rekola, L.
Number of pages: 9
Pages: 894-902
Publication date: Aug 2016

Host publication information

Title of host publication: Proceedings of the INTER-NOISE 2016, 45th International Congress on Noise Control Engineering : Towards a Quieter Future, August 21-24, 2016, Hamburg, Germany
Place of publication: Hamburg
Publisher: German Acoustical Society (DEGA)
Article number: 193
ISBN (Electronic): 978-3-939296-11-9

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Älypölkky, radan monitorointi, kreosoottipölkyn korvaavat vaihtoehdot

General information

Publication status: Published
Organisations: Civil Engineering, Research group: Track Structures
Contributors: Luomala, H.
Publication date: 29 Nov 2016

Publication information

Media of output: Rautatietekniikkaseminaari 2016, Liikennevirasto
Year: 2016
Original language: Finnish

Research output: Other contributionScientific

A method for design of sound insulation of glazed balconies against traffic noise

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Civil Engineering, Research group: Building Acoustics, A-Insinöörit Suunnittelu Oy
Contributors: Kovalainen, V., Kylliäinen, M., Huhtala, T.
Number of pages: 8
Pages: 3834-3841
Publication date: Aug 2016

Host publication information

Title of host publication: Proceedings of the INTER-NOISE 2016, 45th International Congress and Exposition on Noise Control Engineering : Towards a Quieter Future, August 21-24, 2016, Hampburg, Germany
Place of publication: Hamburg
Publisher: German Acoustical Society (DEGA)
Article number: 503
ISBN (Electronic): 978-3-939296-11-9
ASJC Scopus subject areas: Acoustics and Ultrasonics

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

A method for finding suitable particle sizes for thermal conversion processes by using a simulation tool focusing on wood particle heat transfer and chemical kinetics

General information

Publication status: Published
MoE publication type: G4 Doctoral dissertation (monograph)
Organisations: Department of Chemistry and Bioengineering
Contributors: Kokko, L.
Number of pages: 124
Publication date: 2014

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3397-6
Original language: English

Publication series

Name: Tampere University of Techology. Publication
Publisher: Tampere University of Technology
Volume: 1260
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology

Source: researchoutputwizard
Source ID: 742

Research output: Book/ReportDoctoral thesisMonograph

Anaerobic digestion of autoclaved and untreated food waste

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Tampio, E., Ervasti, S., Paavola, T., Heaven, S., Banks, C., Rintala, J.
Number of pages: 8
Pages: 370-377
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Waste Management
Volume: 34
Issue number: 2
ISSN (Print): 0956-053X
Ratings: 
  • Scopus rating (2014): CiteScore 5.9 SJR 1.763 SNIP 2.499
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-05-06<br/>Publisher name: Pergamon

Source: researchoutputwizard
Source ID: 1599

Research output: Contribution to journalArticleScientificpeer-review

A national collaboration process: Finnish engineering education for the benefit of people and environment

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Takala, A., Korhonen-Yrjänheikki, K.
Pages: 1557-1569
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: Science and Engineering Ethics
Volume: 19
Issue number: 4
ISSN (Print): 1353-3452
Ratings: 
  • Scopus rating (2013): CiteScore 2.3 SJR 0.508 SNIP 1.037
Original language: English

Bibliographical note

online first<br/>Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 3499

Research output: Contribution to journalArticleScientificpeer-review

An example of exposure to magnetic fields in the home

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Österholm, L., Pääkkönen, R., Lehtelä, R., Holm, A., Korpinen, L.
Number of pages: 2
Pages: 1-2
Publication date: 2010

Host publication information

Title of host publication: Bioelectromagnetics Society 32nd Annual Meeting (BEMS), June 14-18, 2010, Seoul, Korea

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 8914

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

An experimental study and numerical modeling of combusting two coal chars in a drop-tube reactor: A comparison between N2/O2, CO2/O2, and N2/CO2/O2 atmospheres

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Tolvanen, H., Raiko, R.
Number of pages: 12
Pages: 190-201
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Fuel
Volume: 124
ISSN (Print): 0016-2361
Ratings: 
  • Scopus rating (2014): CiteScore 5.6 SJR 1.634 SNIP 2.29
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-03-15<br/>Publisher name: Elsevier Ltd

Source: researchoutputwizard
Source ID: 1638

Research output: Contribution to journalArticleScientificpeer-review

Anxiety vs reality – Sufficiency of battery electric vehicle range in Switzerland and Finland

Limitations of battery capacity in battery electric vehicles (BEVs) contribute to what is known as range anxiety, and therefore poses an obstacle to their mass-market adoption. While high-range BEVs have been recently introduced, it is not clear whether they will be able to cover all possible trips without long recharging detours, and what the infrastructure needs of those vehicles are. To understand the impact of range limitations in Switzerland and Finland, we constructed a simulation model that is based on representative national travel surveys. We use it to calculate the potential of BEVs to cover any trips and investigate options to increase this coverage. The options discussed in this paper are ways to facilitate easy recharging, such as infrastructure development policies. We complement our results with insights from three focus groups. The results suggest that 85–90% of all national trips could have already been covered with BEVs prevalent in 2016. If the charging station infrastructure is developed appropriately and high-range BEVs are adopted, it is possible to reach a potential coverage of 99% or more in both countries. Deploying charging stations at users’ homes and in residential areas does contribute significantly to this improvement and is desirable from a car user’s perspective. Providing fast-charging stations in other locations is necessary to maximise the potential. We recommend to focus policy efforts on the development of residential charging options and to increase the visibility of electro-mobility using fast-charging stations.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Transport Research Centre Verne, Civil Engineering, ETH Zürich
Contributors: Melliger, M., van Vliet, O. P., Liimatainen, H.
Number of pages: 15
Pages: 101-115
Publication date: 23 Aug 2018
Peer-reviewed: Yes

Publication information

Journal: TRANSPORTATION RESEARCH PART D: TRANSPORT AND ENVIRONMENT
Volume: 65
ISSN (Print): 1361-9209
Ratings: 
  • Scopus rating (2018): CiteScore 6.2 SJR 1.448 SNIP 1.996
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Application oriented wear testing of wear resistant steels in mining industry

Tampere Wear Center have developed several high-stress wear testers that utilize large sized abrasive particles of natural origin and thus are able to
simulate demanding applications of the mining industry. In this work, a versatile high speed slurry-pot wear tester was developed. Research questions
studied are: 1) How to set up a wear test method for simulating the real applications?, 2) What are the wear mechanisms in high-stress wear?, and
3) What is the role of microstructure and chemical composition on wear performance of wear resistant steels?

The high speed slurry-pot tester was developed for application oriented erosion wear testing of materials used in mineral handling and processing. It
enables tests in demanding high-stress abrasive and erosive environments simulating wear, for example, in slurry pumps, tanks and pipes, dredging,
mineral crushing and grinding, screening, loader buckets, and rock drilling. The key design features of the test method are the possibility to use up to
10 millimeter sized large abrasives and sample speeds up to 20 m/s in conditions ranging from wet slurry environments to dry sand or gravel.

The work has been done in FIMECC DEMAPP and DIMECC BSA projects, the focus is in the application oriented wear testing of materials intended for
demanding wear related applications.

General information

Publication status: Published
Organisations: Department of Materials Science, Research group: Materials Characterization
Contributors: Ojala, N.
Publication date: Nov 2016
Peer-reviewed: Unknown
Event: Paper presented at DIMECC 9th Annual Seminar, Helsinki, Finland.
ASJC Scopus subject areas: Mechanics of Materials, Metals and Alloys, Polymers and Plastics, Industrial and Manufacturing Engineering
Keywords: Wear testing, Application oriented, Steels, Polymer, Mining, mineral processing, Field test

Research output: Other conference contributionPaper, poster or abstractScientific

Appropriate pricing policy needed worldwide for improving water services infrastructure

This article highlights the enormous and growing gap between the projected and required financing of water services infrastructure, which is caused by unviable pricing and/or costrecovery regimes. Globally there is a growing funding gap in rehabilitation, renewal, and replacement of aging water infrastructure and the need for future greenfield investments. Underpricing of water services and the need for rehabilitation seem to be worldwide phenomena. There are diverse constraints in OECD (Organisation for Economic Co-Operation and Development) and non-OECD countries contributing to underpriced water services; however, the message is clear: the global water industry must stop underpricing precious water resources. Future enjoyment of sustainable water services will require customers to bear all or at least a major part of the costs. Better awareness of broader economic and social benefits of water supply, and particularly of sanitation, also will be needed.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Life Cycle Effectiveness of the Built Environment (LCE@BE)
Contributors: Hukka, J. J., Katko, T. S.
Pages: E37-E46
Publication date: 1 Jan 2015
Peer-reviewed: Yes

Publication information

Journal: Journal American Water Works Association
Volume: 107
Issue number: 1
ISSN (Print): 0003-150X
Ratings: 
  • Scopus rating (2015): CiteScore 0.9 SJR 0.401 SNIP 0.641
Original language: English
ASJC Scopus subject areas: Water Science and Technology, Chemistry(all)
Keywords: Aging and deteriorating infrastructure, Pricing, Sustainability, Sustainable cost recovery, Underpricing, Water services infrastructure
Source: Scopus
Source ID: 84920619765

Research output: Contribution to journalArticleScientificpeer-review

A recombinant Escherichia coli sensor strain for the detection of tetracyclines

A bioluminescent Escherichia coli K-12 strain for the specific detection of the tetracycline group of antibiotics is described, A sensor plasmid, containing five genes from bacterial luciferase operon of Photorhabdus luminescens inserted under the control of tetracycline-responsive elements of the transposon Tn10, was constructed. Usage of the full-length luciferase operon in the sensor resulted in tetracycline-dependent light production without additions, i.e., self-luminescent phenotype, since all the substrates were intrinsically produced by the recombinant organism, The time needed for optimal induction of light emission was 90 min. Maximal induction of similar to 100-fold over uninduced levels by using 20 ng of tetracycline, and picomole sensitivities for the seven different tetracyclines tested, were obtained without added Mg2+ ions. The higher the pH and the magnesium ion concentration in the assay medium the higher was the amount of membrane-impermeable tetracycline-Mg2+ chelate complex. In consequence, by adjusting the pH and the Mg2+ ion concentration, the sensitivity of the assay can be modified for different analytical purposes. Different non-tetracycline antibiotics did not cause induction of light emission.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Univ Turku, University of Turku, Dept Biotechnol, University of Turku
Contributors: Korpela, M. T., Kurittu, J. S., Karvinen, J. T., Karp, M. T.
Number of pages: 6
Pages: 4457-4462
Publication date: 1 Nov 1998
Peer-reviewed: Yes

Publication information

Journal: Analytical Chemistry
Volume: 70
Issue number: 21
ISSN (Print): 0003-2700
Original language: English
Keywords: XENORHABDUS-LUMINESCENS, EXPRESSION, ANTIMONITE, PROMOTER, ARSENITE, BACTERIA, BINDING, CLONING, GENES
Source: WOS
Source ID: 000076839000011

Research output: Contribution to journalArticleScientificpeer-review

Are Finns walking the talk? : Examining the national collaboration process on engineering education for sustainable development five years later

In 2009, the National Collaboration Group for Finnish Engineering Education published a proposal for action on sustainable development (SD). The aim of this paper is to analyze how the three main universities providing engineering education have fulfilled their commitments. The study consists of interviews with key stakeholders supplemented with the analysis of documented material. It is argued that the studied universities are now committed to SD in their strategies. However, a lot of work remains to be done before the strategies are implemented and SD is integrated to all degree programmes. Recommendations for the next steps are presented.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Chemistry and Bioengineering, The Education Fund
Contributors: Takala, A., Korhonen-Yrjänheikki, K.
Publication date: 1 Jun 2015

Host publication information

Title of host publication: Conference on Engineering Education for Sustainable Development (7th : 2015 : Vancouver, B.C.)

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Are there environmental or agricultural benefits in using forest residue biochar in boreal agricultural clay soil?

Short-term agronomic and environmental benefits are fundamental factors in encouraging farmers to use biochar on a broad scale. The short-term impacts of forest residue biochar (BC) on the productivity and carbon (C) storage of arable boreal clay soil were studied in a field experiment. In addition, rain simulations and aggregate stability tests were carried out to investigate the potential of BC to reduce nutrient export to surface waters. A BC addition of 30 t ha−1 increased soil test phosphorus and decreased bulk density in the surface soil but did not significantly change pH or water retention properties, and most importantly, did not increase the yield. There were no changes in the bacterial or fungal communities, or biomasses. Soil basal respiration was higher in BC-amended plots in the spring, but no differences in respiration rates were detected in the fall two years after the application. Rain simulation experiments did not support the use of BC in reducing erosion or the export of nutrients from the field. Of the C added, on average 80% was discovered in the 0–45 cm soil layer one year after the application. Amendment of boreal clay soil with a high rate of BC characterized by a moderately alkaline pH, low surface functionalities, and a recalcitrant nature, did not induce such positive impacts that would unambiguously motivate farmers to invest in BC. BC use seems unviable from the farmer's perspective but could play a role in climate change mitigation, as it will likely serve as long-term C storage.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Computational Biophysics and Imaging Group, BioMediTech, Natural Resources Institute Finland (Luke), HAMK University of Applied Sciences
Contributors: Soinne, H., Keskinen, R., Heikkinen, J., Hyväluoma, J., Uusitalo, R., Peltoniemi, K., Velmala, S., Pennanen, T., Fritze, H., Kaseva, J., Hannula, M., Rasa, K.
Publication date: 20 Aug 2020
Peer-reviewed: Yes

Publication information

Journal: Science of the Total Environment
Volume: 731
Article number: 138955
ISSN (Print): 0048-9697
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Environmental Chemistry, Waste Management and Disposal, Pollution
Keywords: Biochar, Carbon sequestration, Microbial community, Nutrient leaching, Soil productivity, Soil quality
Electronic versions: 
Source: Scopus
Source ID: 85084456173

Research output: Contribution to journalArticleScientificpeer-review

Arsenic in bedrock, soil and groundwater - The first arsenic guidelines for aggregate production established in Finland

Concern over arsenic (As)-rich drinking water has gained worldwide attention since the 1990s, when the prob- lem was discovered in West Bengal in India and in Bangladesh. Since then, authorities and research institutes have focused on risk assessment and management for As in Finland. Nationwide geochemical mapping projects determined background levels and revealed regions with a higher than average As content in bedrock and soil. Approximately 10% of the citizens in Finland use drinking water from private wells. Groundwater, especially from drilled bedrock wells, may contain As concentrations higher than 10 μg/L, the European Union quality guideline for As in drinking water. Here, we present the outcome of two European Union projects, RAMAS and ASROCKS, which based their conclusions on nationwide databases and thousands of samples. Both RAMAS and ASROCKS focused on the Tampere-Häme region of Southern Finland, where bedrock and soil contain more As than in other parts of Finland on average. Over 1000 groundwater samples revealed that drilled bedrock wells may contain As-rich water in certain geological units. Naturally occurring As in bedrock and soil may also cause themobilization of As during rock aggregate production and construction activities, potentially impacting on groundwater aquifers, surface waters, and biota. Arsenic concentrations in aggregate production and con- struction exceeded the regional background levels in some bedrock and aggregate product samples, but during leaching tests As concentrations were found to be low. Based on the results, riskmanagement toolswere revised and guidelines for the rock aggregate industry were established in cooperation with authorities, companies, and other stakeholders. To our knowledge, the guidelines establishedwere the first in theworld. The guidelines for As for the aggregate and construction industries can be applied in other countries and adapted to local conditions.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Earth Constructions, Research group: Track Structures, Aalto University, Geologian tutkimuskeskus, Finnish Environment Institute
Contributors: Parviainen, A., Loukola-Ruskeeniemi, K., Tarvainen, T., Hatakka, T., Härmä, P., Backman, B., Ketola, T., Kuula, P., Lehtinen, H., Sorvari, J., Pyy, O., Ruskeeniemi, T., Luoma, S.
Number of pages: 15
Pages: 709-723
Publication date: 1 Nov 2015
Peer-reviewed: Yes

Publication information

Journal: Earth-Science Reviews
Volume: 150
ISSN (Print): 0012-8252
Ratings: 
  • Scopus rating (2015): CiteScore 11.3 SJR 3.692 SNIP 3.143
Original language: English
ASJC Scopus subject areas: Earth and Planetary Sciences(all)
Keywords: Arsenic, Bedrock, Construction, Groundwater, Risk management, Rock aggregates, Soil, Surface water
Source: Scopus
Source ID: 84943781121

Research output: Contribution to journalArticleScientificpeer-review

Asiakkaat, verkostot ja henkilöstö

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Civil Engineering
Contributors: Rajala, R.
Pages: 370-491
Publication date: 2010

Host publication information

Title of host publication: Näkymätönt Porrii : Porin Veden historia
Publisher: TamPub
Editors: Juuti, P., Katko, T., Louekari, S., Rajala, R.
ISBN (Print): 978-952-5414-80-6
ISBN (Electronic): 978-951-44-8215-1

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

ASROCKS-Hankkeen heikkouuttomenetelmien vertailu

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Civil Engineering
Contributors: Tarvainen, T., Hatakka, T., Backman, B., Ketola, T., Härmä, P.
Number of pages: 13
Publication date: 2014

Publication information

Publisher: GEOLOGIAN TUTKIMUSKESKUS
Original language: Finnish

Bibliographical note

Contribution: organisation=rak,FACT1=1<br/>Portfolio EDEND: 2014-12-30

Source: researchoutputwizard
Source ID: 1607

Research output: Book/ReportCommissioned reportProfessional

Assessment of metabolic flux distribution in the thermophilic hydrogen producer Caloramator celer as affected by external pH and hydrogen partial pressure

Background: Caloramator celer is a strict anaerobic, alkalitolerant, thermophilic bacterium capable of converting glucose to hydrogen (H2), carbon dioxide, acetate, ethanol and formate by a mixed acid fermentation. Depending on the growth conditions C. celer can produce H2 at high yields. For a biotechnological exploitation of this bacterium for H2 production it is crucial to understand the factors that regulate carbon and electron fluxes and therefore the final distribution of metabolites to channel the metabolic flux towards the desired product.Results: Combining experimental results from batch fermentations with genome analysis, reconstruction of central carbon metabolism and metabolic flux analysis (MFA), this study shed light on glucose catabolism of the thermophilic alkalitolerant bacterium C. celer. Two innate factors pertaining to culture conditions have been identified to significantly affect the metabolic flux distribution: culture pH and partial pressures of H2 (PH2). Overall, at alkaline to neutral pH the rate of biomass synthesis was maximized, whereas at acidic pH the lower growth rate and the less efficient biomass formation are accompanied with more efficient energy recovery from the substrate indicating high cell maintenance possibly to sustain intracellular pH homeostasis. Higher H2 yields were associated with fermentation at acidic pH as a consequence of the lower synthesis of other reduced by-products such as formate and ethanol. In contrast, PH2 did not affect the growth of C. celer on glucose. At high PH2 the cellular redox state was balanced by rerouting the flow of carbon and electrons to ethanol and formate production allowing unaltered glycolytic flux and growth rate, but resulting in a decreased H2 synthesis.Conclusion: C. celer possesses a flexible fermentative metabolism that allows redistribution of fluxes at key metabolic nodes to simultaneously control redox state and efficiently harvest energy from substrate even under unfavorable conditions (i.e. low pH and high PH2). With the H2 production in mind, acidic pH and low PH2 should be preferred for a high yield-oriented process, while a high productivity-oriented process can be achieved at alkaline pH and high PH2. © 2014 Ciranna et al.; licensee BioMed Central Ltd.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Tampere University of Technology, Urban circular bioeconomy (UrCirBio), Lunds Universitet / Lunds Tekniska Högskola, Lund Univ, Lund University, Department of Applied Microbiology
Contributors: Ciranna, A., Pawar, S. S., Santala, V., Karp, M., van Niel, E. W. J.
Publication date: 28 Mar 2014
Peer-reviewed: Yes

Publication information

Journal: Microbial Cell Factories
Volume: 13
Issue number: 1
Article number: 48
ISSN (Print): 1475-2859
Ratings: 
  • Scopus rating (2014): CiteScore 7 SJR 1.757 SNIP 1.508
Original language: English
ASJC Scopus subject areas: Biotechnology, Bioengineering, Applied Microbiology and Biotechnology
Keywords: Biohydrogen production, Caloramator, Ethanol, Fermentation, Formate, Hydrogen tolerance, Metabolic flux analysis, Metabolic shift, Pyruvate node, Redox state

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-04-29<br/>Publisher name: BioMed Central Ltd.

Source: researchoutputwizard
Source ID: 236

Research output: Contribution to journalArticleScientificpeer-review

Assessment of the Analytical Potential of HPLC-SEC for the Characterization of DOM and Nutrients in Various Types of Water

This study focused on high performance size exclusion liquid chromatography (HPLC-SEC) combined with two ultraviolet (UV, 254 nm and 224 nm) detection wavelengths to detect humic-like compounds and two fluorescence (FLU) excitation/emission (tyrosine-like and tryptophan-like) wavelengths to detect protein type compounds in water samples. Targeted particularly were further possibilities of this method, such as finding suitable chromatographic surrogates for organic matter and nutrient indicators for water types such as catchment surface waters, well waters, and onsite wastewater effluents, which have been studied little before. It was thus necessary to determine the optimum analytical conditions for exacting wastewater effluent analysis in term of eluent strength, eluent pH, and sample injection volume. Additionally, this study provided valuable information on the spatial and temporal behavior of dissolved organic matter along a catchment area and on the quality of onsite wastewater effluent and well water in sparsely populated areas.

A TSK-GEL G3000SW column, Na-acetate of 0.01 M at pH=7 eluent, and an injection volume of 30 μL guaranteed good separation of dissolved organic matter (DOM) in surface and well water samples up to 8 fractions and further up to 11 fractions in complex onsite black water effluents. For systematic analysis of high strength onsite wastewater effluents, we chose, based on calculations of global resolution at various eluent conditions, Na-acetate of 0.02 M at pH=7 eluent and an injection volume of 20 μL.

DOM concentration dropped along the catchment, as 35-75% of dissolved organic carbon (DOC) was eliminated. DOM in drains had up to 80% high molecular weight (HMW) fraction and lakes only 50-60% HMW. Drains had high DOC in summer and lakes in winter and spring with seasonal increase in DOC resulting from increased HMW fractions in these waters. The water treatment plant eliminated HMW fractions from raw water up to 100%, intermediate MW (IMW) fractions up to 87%, and low LMW fractions up to 66%. A seasonal increase in raw water DOM was detected in drinking water samples as increased IMW and appearance of HMW fractions. Of the two protein-type detections, tryptophan-type signals were clearly measured in surface water. Tryptophan-like FLU, as sum of peak height (SPH), was consistently higher in the drain affected by agriculture than in the drain in the mire area.

The study on well waters showed that, on average, shallow and deep well water differ little in quality in the sparsely populated agricultural areas studied. According to HPLC-SEC-UV254, high-DOC well water samples had clear and often dominant HMW fractions and low-DOC samples hardly any HMW fractions but dominant IMW fractions. The LMW fraction, correlating with nitrate, indicates anthropogenic influence. Nitrate was precisely calculated from the peak height (PH) of the LMW fraction detected by UV-224.

Our study on onsite blackwater effluent (BWE) and greywater effluent (GWE) disclosed the overall quality of onsite wastewater effluents with BWEs having higher mean values than GWEs for all the conventional indicators measured. The chromatograms (UV-254, tyrosine, and tryptophan) of onsite wastewater effluents showed the regular peaks for surface and well waters and extra peaks eluted over the permeation volume. Dividing the chromatograms into 3 regions helped identify the best possible surrogates for conventional indicators. Region 3 comprising the late peaks eluted over the permeation volume in the tyrosine- and tryptophanchromatograms correlated best with biochemical oxygen demand (BOD-7), showing that these fractions are biodegradable. Tyrosine-like chromatograms assess best DOC and BOD-7, trytophan-like chromatograms best total nitrogen (TN), and UV254 and tyrosine-like chromatograms best the chemical oxygen demand (COD) of wastewater effluents. Regression equations corresponding to the best correlations between the chromatographic and conventional indicators are given in the study for reliable calculation of DOC, COD, and BOD-7 and rough assessment of the TN.

This study highlights the fact that secondary interactions, unwanted in SEC can be exploited in nitrate measurement of well waters and BOD assessment of high strength wastewater effluents.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Materials Science and Environmental Engineering
Contributors: Szabó, H. M.
Publication date: 6 Mar 2020

Publication information

Publisher: Tampere University
Volume: 224
ISBN (Print): 978-952-03-1481-1
ISBN (Electronic): 978-952-03-1482-8
Original language: English

Publication series

Name: Tampere University Dissertations
Volume: 224
ISSN (Print): 2489-9860
ISSN (Electronic): 2490-0028

Research output: Book/ReportDoctoral thesisCollection of Articles

Asset Life Cycle Management in Finnish Water Utilities

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Civil Engineering
Contributors: Rajala, R., Hukka, J.
Number of pages: 9
Pages: 587-595
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: JOURNAL OF WATER RESOURCE AND PROTECTION
Volume: 10
Issue number: 6
ISSN (Print): 1945-3094
Original language: English

Research output: Contribution to journalReview ArticleScientificpeer-review

Asteittain kohti keskitettyä jätevedenpuhdistusta

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Katko, T.
Pages: 312-369
Publication date: 2010

Host publication information

Title of host publication: Näkymätönt Porrii. Porin Veden historia
Editors: Juuti, P., Katko, T., Louekari, S., Rajala, R.

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8310

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

A study of a condensing heat exchanger and electrostatic precipitator combination for small-scale wood combustion

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Physics, Research area: Aerosol Physics, Research area: Optics, Research group: The Instrumentation, Emissions, and Atmospheric Aerosols Group
Contributors: Grigonyte, J., Sippula, O., Tissari, J., Laitinen, A., Keskinen, J., Kortelainen, M., Lamberg, H., Jokiniemi, J.
Publication date: 2015

Host publication information

Title of host publication: European Aerosol Conference 2015 : EAC 2015, Milan, Italy
Article number: 2COA_P021

Bibliographical note

ISBN kysytty, HO.

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

A study on raw, torrefied, and steam-exploded wood: Fine grinding, drop-tube reactor combustion tests in N2/O2 and CO2/O2 atmospheres, particle geometry analysis, and numerical kinetics modeling

The purpose of this study was to compare the fine grinding properties and combustion behavior of three wood pellet products: raw, torrefied, and steam-exploded wood. The energy required to fine grind the pellets was tested, and so was the geometry and size distribution of the resulting ground products. Out of all the samples the steam-exploded wood pellet required the most energy for grinding. However, it also produced more sphere-like particles compared to the other two types of samples. The combustion behavior of the samples was tested in a laminar drop-tube reactor (DTR). The samples were preground and the particles were sieved with vibration sieves with an opening of 112–125 μm. The pyrolysis process was examined separately at a temperature range of 973–1173 K. The combined pyrolysis and combustion tests were carried out at a reactor temperature of 1123 K. The O2 concentrations used in the measurements were 3–21 vol-% in either N2 or CO2 atmospheres. The initial size distribution of the sample particles as well as their diameter evolution during pyrolysis and combustion was studied by using optical techniques. The surface temperature of the combusting particles was measured with a two-color pyrometer from within the DTR. The density, specific surface area, and pore diameter were measured from the ground samples with a mercury porosimeter. The chemical kinetic parameters, which describe the pyrolysis and char oxidation rates of the samples, were determined by using the data from the measurements.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Power Plant and Combustion Technology
Contributors: Tolvanen, H., Keipi, T., Raiko, R.
Pages: 153-164
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: Fuel
Volume: 176
ISSN (Print): 0016-2361
Ratings: 
  • Scopus rating (2016): CiteScore 7.8 SJR 1.736 SNIP 2.206
Original language: English
Keywords: Combustion, Biomass, Chemical kinetics, Carbon dioxide, Drop-tube reactor

Research output: Contribution to journalArticleScientificpeer-review

Atmospheric plasma enhanced hybrid barrier films through reel-to-reel process

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Nikkola, J., Mannila, J., Vartiainen, J., Tuominen, M., Nättinen, K.
Number of pages: 11
Pages: 1-11
Publication date: 2010

Host publication information

Title of host publication: ICNP-2010, Second International Conference on Natural Polymers, Bio-Polymers, Bio-Materials, their Composites, Blends, IPNs and Gels Polyelectrolytes and Gels: Macro to Nano Scales, September 24-26, 2010, Espoo, Finland

Bibliographical note

Contribution: organisation=epr pap,FACT1=1

Source: researchoutputwizard
Source ID: 8851

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Autolaskurin käyttöopas ja laskennan perusteet

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Civil Engineering, Research group: Transport Research Centre Verne, Suomen ympäristökeskus SYKE - Finnish Environment Institute, University of Helsinki
Contributors: Seppälä, J., Munther, J., Viri, R., Liimatainen, H., Weaver, S., Ollikainen, M.
Publication date: 13 Dec 2019

Publication information

Publisher: Suomen ilmastopaneeli
Volume: 11
Edition: 2019
Original language: Finnish

Research output: Book/ReportCommissioned reportProfessional

Bacterial community transcription patterns during a marine phytoplankton bloom

Bacterioplankton consume a large proportion of photosynthetically fixed carbon in the ocean and control its biogeochemical fate. We used an experimental metatranscriptomics approach to compare bacterial activities that route energy and nutrients during a phytoplankton bloom compared with non-bloom conditions. mRNAs were sequenced from duplicate bloom and control microcosms 1 day after a phytoplankton biomass peak, and transcript copies per litre of seawater were calculated using an internal mRNA standard. Transcriptome analysis revealed a potential novel mechanism for enhanced efficiency during carbon-limited growth, mediated through membrane-bound pyrophosphatases [V-type H(+)-translocating; hppA]; bloom bacterioplankton participated less in this metabolic energy scavenging than non-bloom bacterioplankton, with possible implications for differences in growth yields on organic substrates. Bloom bacterioplankton transcribed more copies of genes predicted to increase cell surface adhesiveness, mediated by changes in bacterial signalling molecules related to biofilm formation and motility; these may be important in microbial aggregate formation. Bloom bacterioplankton also transcribed more copies of genes for organic acid utilization, suggesting an increased importance of this compound class in the bioreactive organic matter released during phytoplankton blooms. Transcription patterns were surprisingly faithful within a taxon regardless of treatment, suggesting that phylogeny broadly predicts the ecological roles of bacterial groups across 'boom' and 'bust' environmental backgrounds.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: The University of Tennessee, Knoxville
Contributors: Rinta-Kanto, J. M., Sun, S., Sharma, S., Kiene, R. P., Moran, M. A.
Number of pages: 12
Pages: 228-239
Publication date: Jan 2012
Peer-reviewed: Yes

Publication information

Journal: Environmental Microbiology
Volume: 14
Issue number: 1
Ratings: 
  • Scopus rating (2012): CiteScore 10.6 SJR 3.165 SNIP 1.639
Original language: English
Source: Mendeley
Source ID: fa164c9c-a2ce-339c-a2ef-5da44c537175

Research output: Contribution to journalArticleScientificpeer-review

Bacterial diversity and active biomass in full-scale granular activated carbon filters operated at low water temperatures

Granular activated carbon (GAC) filtration enhances the removal of natural organic matter and micropollutants in drinking water treatment. Microbial communities in GAC filters contribute to the removal of the biodegradable part of organic matter, and thus help to control microbial regrowth in the distribution system. Our objectives were to investigate bacterial community dynamics, identify the major bacterial groups, and determine the concentration of active bacterial biomass in full-scale GAC filters treating cold (3.7-9.5°C), physicochemically pretreated, and ozonated lake water. Three sampling rounds were conducted to study six GAC filters of different operation times and flow modes in winter, spring, and summer. Total organic carbon results indicated that both the first-step and second-step filters contributed to the removal of organic matter. Length heterogeneity analysis of amplified 16S rRNA genes illustrated that bacterial communities were diverse and considerably stable over time. α-Proteobacteria, β-Proteobacteria, and Nitrospira dominated in all of the GAC filters, although the relative proportion of dominant phylogenetic groups in individual filters differed. The active bacterial biomass accumulation, measured as adenosine triphosphate, was limited due to low temperature, low flux of nutrients, and frequent backwashing. The concentration of active bacterial biomass was not affected by the moderate seasonal temperature variation. In summary, the results provided an insight into the biological component of GAC filtration in cold water temperatures and the operational parameters affecting it.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Kaarela, O. E., Härkki, H. A., Palmroth, M. R., Tuhkanen, T. A.
Number of pages: 12
Pages: 681-692
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Environmental Technology
ISSN (Print): 0959-3330
Ratings: 
  • Scopus rating (2014): CiteScore 2.1 SJR 0.646 SNIP 0.819
Original language: English

Bibliographical note

Published online: 22 Sep 2014<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-10-15<br/>Publisher name: Taylor & Francis Ltd.

Source: researchoutputwizard
Source ID: 629

Research output: Contribution to journalArticleScientificpeer-review

Ballast bed

General information

Publication status: Published
Organisations: Civil Engineering, Research group: Track Structures
Contributors: Luomala, H.
Publication date: 24 Nov 2016

Publication information

Media of output: Presentation at Nordisk Banteknisk Ingenjörsutbildning (NBIU), Espoo
Year: 2016
Original language: English

Research output: Other contributionScientific

Betonielementtien uudelleenkäyttömahdollisuudet

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, School of Architecture, Research group: Built Environment in Transition
Contributors: Lahdensivu, J., Huuhka, S., Annila, P., Pikkuvirta, J., Köliö, A., Pakkala, T.
Number of pages: 78
Publication date: 2015

Publication information

Place of publication: Tampere
Publisher: Tampereen teknillinen yliopisto. Rakennustekniikan laitos
ISBN (Electronic): 978-952-15-3461-4
Original language: Finnish

Publication series

Name: Tampereen teknillinen yliopisto. Rakennustekniikan laitos. Rakennetekniikka. Tutkimusraportti
Publisher: Tampereen teknillinen yliopisto. Rakennustekniikan laitos
Volume: 162
ISSN (Print): 1797-9161

Bibliographical note

Contribution: organisation=rak,FACT1=1<br/>Portfolio EDEND: 2015-03-27

Source: researchoutputwizard
Source ID: 18

Research output: Book/ReportCommissioned reportProfessional

Betonirakenteiden korjausohjeet 2016, by 41

General information

Publication status: Published
MoE publication type: D5 Text book, professional manual or guide or a dictionary
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Research area: Structural Engineering
Contributors: Köliö, A., Pakkala, T., Lahdensivu, J., Pentti, M.
Number of pages: 115
Publication date: May 2016

Publication information

Publisher: Suomen Betoniyhdistys r.y.
ISBN (Print): 978-952-68068-7-7
Original language: Finnish

Research output: Book/ReportBookProfessional

Bilateral collaboration in municipal water and wastewater services in Finland

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Department of Chemistry and Bioengineering
Contributors: Kurki, V. O., Katko, T. S., Pietilä, P. E.
Pages: 815-825
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Water
Volume: 2
Issue number: 4
ISSN (Print): 2073-4441
Ratings: 
  • Scopus rating (2010): SNIP 0
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8494

Research output: Contribution to journalReview ArticleScientificpeer-review

Biochars from solid digestates as sorbing materials for metal(loid)s removal from water

Sewage sludge digestate (SSD) and the organic fraction of municipal solid waste
digestate (OFMSWD) are currently considered as alternative feedstocks for biochar production due to the high amount of the organic solid waste remaining at the end of the treatment. The pyrolysis of solid digestate is known as an alternative to promote the recycling of organic wastes and generate added-value bio-products (e.g. biochar). Generally, the digestate biochar has a much lower sorption capacity for metal(loid)s compared to activated carbons. Therefore, chemical treatment is considered as a potential option to improve the biochar surface properties and thus inducing a better sorption ability for metal(loid)s on the biochar surface.

In this present work, the SSD and OFMSWD derived biochars were treated with 2 M KOH or 10% H2O2 followed by batch washing or batch and subsequent column washings with ultrapure water. The physicochemical properties including the pH of point of zero charge (pHPZC), the Brunauer-Emmett-Teller surface area (SBET) and cation exchange capacity (CEC) were determined for all the biochars in order to link their improved surface properties to the enhanced sorption ability for metal(loid)s. All the biochars were then used to study the influence of chemical treatment and biochar washing procedure on the sorption behavior of Pb(II), Cd(II) and As(III, V) through the batch sorption kinetics and isotherms. Moreover, the As redox state distribution (i.e. As(III) and As(V)) during the As(III) sorption onto the biochar surface and in liquid solution was determined by using solid-liquid extraction followed by liquid chromatographic analysis.

Results showed increases of the pHPZC, SBET and CEC after chemical treatment of the biochar, in accordance with the enhanced sorption ability for Pb(II), Cd(II) and As(V). For instance, the maximum sorption capacity (Qm) was increased from 1.6 µmol g−1 (As(V)) and 15.4 µmol g−1 (Cd(II)) on the raw SSD biochar to 8.1 µmol g−1 (As(V)) and 306.1 µmol g−1 (Cd(II)) after the H2O2 and KOH treatment, respectively (at initial pH 5.0). Similarly, the Qm of Pb(II) was also increased from 31.4 µmol g⁻1 (raw SSD biochar) to 121.9 µmol g⁻1 on the H2O2 modified SSD biochar. However, the sorption capacity for Pb(II) was not determined after KOH treatment due to the failing of the Langmuir isotherm model to fit the experimental data. This indicates that insufficient washing of
the KOH-modified SSD biochar can hinder the Pb(II) sorption due to the release
dissolved organic compounds from this biochar that may interact with Pb2+ and thereby forming Pb-ligand complexes in the solution. In addition, the As redox distribution showed a large oxidation (70%) of As(III) to As(V) in KOH-modified SSD biochar with batch washing, while As(III) was partially oxidized (7%) in the KOH-modified SSD biochar with batch and subsequent column washings. This highlights an important role of washing procedure for sorption of metal(loid)s, particularly for Pb(II) and As(V).

The As extraction followed by liquid chromatographic analysis was successfully
established to quantitatively recover and preserve As(III) oxidation with the use of ascorbic acid. During the sorption kinetics, As(III) may be stable or partially oxidized depending on the biochar treatment. In addition, the oxidation of As(III) was strongly induced by the biochar material and to a lesser extent by the release of dissolved compounds from the biochar.

In summary, digestate biochars with the chemical treatment followed by a proper
biochar washing procedure can be successfully used as potential sorbents to enhance the Pb(II), Cd(II) and As(III, V) sorption capacity. Moreover, the determination of As redox distribution on the biochars and in liquid phase during the sorption process can be achieved through the As extraction and chromatographic analysis, providing a better understanding of the transformation between As(III) and As(V) in the biochar-liquid sorption system.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Materials Science and Environmental Engineering
Contributors: Wongrod, S.
Number of pages: 79
Publication date: 23 May 2019

Publication information

Publisher: Tampere University
Original language: English

Publication series

Name: Tampere University Dissertations
URLs: 

Research output: Book/ReportDoctoral thesisCollection of Articles

Bioenergy consumption and biogas potential in Cambodian households

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Mustonen, S., Raiko, R., Luukkanen, J.
Number of pages: 17
Pages: 1875-1892
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: Sustainability
Volume: 5
Issue number: 5
ISSN (Print): 2071-1050
Ratings: 
  • Scopus rating (2013): CiteScore 1.9 SJR 0.521 SNIP 1.115
Original language: English

Bibliographical note

ei vielä UT 2013-09-19<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-09-29<br/>Publisher name: MDPI AG

Source: researchoutputwizard
Source ID: 2963

Research output: Contribution to journalArticleScientificpeer-review

Biofiltration of odours in dry toilet air

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering, Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Palmroth, M. R., Kolha, V., Ramos Garcia, A., Richter, C., Crosnier, F., Perrier, L., Tuhkanen, T.
Number of pages: 7
Pages: 291-297
Publication date: 2013

Host publication information

Title of host publication: Biotechniques for air pollution control and bioenergy
Place of publication: Paris
Publisher: Presses des MINES
Editor: Malhautier, L.
ISBN (Print): 978-2-35671-058-1

Bibliographical note

Biotechniques 2013, Biotechniques for Air Pollution Control & Bioenergy, 10-13 September 2013, Nimes, France<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-10-29

Source: researchoutputwizard
Source ID: 3086

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Biogenic hydrogen and methane production from Chlorella vulgaris and Dunaliella tertiolecta biomass

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Lakaniemi, A., Hulatt, C. J., Thomas, D. N., Tuovinen, O. H., Puhakka, J. A.
Number of pages: 12
Pages: 1-12
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: Biotechnology for Biofuels
Volume: 4
Issue number: 1
Article number: 34
ISSN (Print): 1754-6834
Ratings: 
  • Scopus rating (2011): CiteScore 6.3 SJR 2.239 SNIP 2.221
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 6540

Research output: Contribution to journalArticleScientificpeer-review

Biogenic hydrogen and methane production from reed canary grass

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Lakaniemi, A., Koskinen, P. E., Nevatalo, L. M., Kaksonen, A. H., Puhakka, J. A.
Pages: 773-780
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: Biomass & Bioenergy
Volume: 35
Issue number: 2
ISSN (Print): 0961-9534
Ratings: 
  • Scopus rating (2011): CiteScore 4.9 SJR 1.759 SNIP 2.306
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 6541

Research output: Contribution to journalArticleScientificpeer-review

Biological methane oxidation in landfill cover soil - constrained by concurrent decomposition processes and sulphide oxidation?

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering, Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Maanoja, S., Palmroth, M., Rintala, J.
Number of pages: 8
Pages: 65-72
Publication date: 2013

Host publication information

Title of host publication: Biotechniques for air pollution control and bioenergy
Place of publication: Paris
Publisher: Presses des MINES
Editor: Luc, M.
ISBN (Print): 978-2-35671-058-1

Bibliographical note

Biotechniques 2013, Biotechniques for Air Pollution Control & Bioenergy, 10-13 September 2013, Nimes, France<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-10-29

Source: researchoutputwizard
Source ID: 2841

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Biological Nitrogen Removal from Acidic, Heavy-metal Containing Waters


General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Zou, G.
Number of pages: 92
Publication date: 2015

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3558-1
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1314
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology

Research output: Book/ReportDoctoral thesisCollection of Articles

Bioprocessing of enhanced cellulase production from a mutant of Trichoderma asperellum RCK2011 and its application in hydrolysis of cellulose

A mutant strain of Trichoderma asperellum RCK2011 was developed through UV-irradiation for enhanced cellulase production and lower catabolite repression. The production of FPase, CMCase and β-glucosidase was optimized under solid state fermentation; up to 20 mM of glucose did not inhibit cellulase production. The mutant strain T. asperellum SR1-7 produced FPase (2.2 IU/gds), CMCase (13.2 IU/gds), and β-glucosidase (9.2 IU/gds) under optimized conditions, which is, 1.4, 1.3, 1.5-fold higher than the wild type. The wild as well as mutant strain produced the cellulases at pH range, 4.0-10.0. Saccharification of pretreated corn cob, wheat straw, and sugarcane bagasse by cellulase from mutant strain SR1-7 resulted in release of reducing sugar at the rate of 530.0 mg/g, 290.0 mg/g, and 335.0 mg/g of substrate, respectively; this is 1.6-fold higher than the wild type strain. © 2014 Published by Elsevier Ltd.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Tampere University of Technology, Urban circular bioeconomy (UrCirBio), Department of Microbiology, University of Delhi South Campus, Lignocellulose Biotechnology Laboratory
Contributors: Raghuwanshi, S., Deswal, D., Karp, M., Kuhad, R. C.
Number of pages: 7
Pages: 183-189
Publication date: 15 May 2014
Peer-reviewed: Yes

Publication information

Journal: Fuel
Volume: 124
ISSN (Print): 0016-2361
Ratings: 
  • Scopus rating (2014): CiteScore 5.6 SJR 1.634 SNIP 2.29
Original language: English
ASJC Scopus subject areas: Fuel Technology, Energy Engineering and Power Technology, Chemical Engineering(all), Organic Chemistry
Keywords: Alkaline cellulase, Catabolite repression, Saccharification, Solid state fermentation

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-03-15

Source: researchoutputwizard
Source ID: 1327

Research output: Contribution to journalArticleScientificpeer-review

Biovalorisation of liquid and gaseous effluents of oil refinery and petrochemical industry

Liquid effluents of oil refinery contain toxic selenium oxyanions and phenol, while gaseous effluents contain toxic CO/syngas. To remove the phenol and simultaneously reduce the selenite oxyanions, a fungal-bacterial co-culture of Phanerochaete chrysosporium and Delftia lacustris was developed. Two modes of co-cultures of the fungus and the bacterium were developed. The first being a freely growing bacterium and fungus (suspended growth co-culture), the second being the growth of the bacterial biomass encircling the fungal biomass
(attached growth co-culture). Both types of fungal-bacterial co-cultures were incubated with varying concentrations of phenols with a fixed selenite concentration (10 mg/L). The suspended growth co-culture could degrade up to 800 mg/L of phenol and simultaneously reduce 10 mg/L of selenite with production of nano Se(0) having a minimum diameter of 3.58
nanometer. The attached growth co-culture could completely degrade 50 mg/L of phenol and simultaneously reduce selenite to nano Se(0) having a minimum diameter of 58.5 nm.

In order to valorize the CO/syngas by bioconversion techniques an anaerobic methanogenic sludge was acclimatized to use CO as sole carbon substrate for a period of 46 days in a continuous stirred stank reactor, supplied with CO at 10 ml/min. 6.18 g/L acetic acid, 1.18 g/L butyric acid, and 0.423 g/L hexanoic acid were the highest concentrations of metabolites produced. Later, acids were metabolized at lower pH, producing alcohols at concentrations of
11.1 g/L ethanol, 1.8 g/L butanol and 1.46 g/L hexanol, confirming the successful enrichment strategy. The next experiment focused on the absence of trace element tungsten, and consecutively selenium on the previously CO acclimatized sludge under the same operating conditions. An in-situ synthesized co-polymeric gel of N-ter-butyl-acrylamide and acrylic acid was used to recover ethanol, propanol and butanol from a synthetic fermentation broth. The scope of repeated use of the gel for the alcohol recovery was investigated and every time
approximately 98% alcohol was recovered.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Materials Science and Environmental Engineering
Contributors: Chakraborty, S.
Number of pages: 211
Publication date: 12 Dec 2019

Publication information

Publisher: Tampere University
Original language: English

Publication series

Name: Tampere University Dissertations
URLs: 

Research output: Book/ReportDoctoral thesisCollection of Articles

Birth and expansion of public water supply and sanitation in Finland until World War II

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P., Katko, T.
Pages: 117-130
Publication date: 2007

Host publication information

Title of host publication: Environmental History of Water - Global views on community water supply and sanitation
Editors: Juuti, P., Katko, T., Vuorinen, H.

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14486

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Book Review: Graham, S. (Ed.), Disrupted Cities: When Infrastructure Fails

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Chemistry and Bioengineering
Contributors: Katko, T.
Publication date: 2010
Peer-reviewed: No

Publication information

Journal: Public Works Management & Policy, Vol. 14, Nr 4, April 2010
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8309

Research output: Contribution to journalArticleScientific

Book review : Oestigaard, T. 2013. Water, Christianity and the rise of capitalism. London, New York: I.B. Tauris. ISBN 978-1-78076-066-7, 209 pages

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Chemistry and Bioengineering
Contributors: Katko, T. S.
Number of pages: 2
Pages: 273-274
Publication date: 2014
Peer-reviewed: No

Publication information

Journal: Water Alternatives
Volume: 7
Issue number: 1
Ratings: 
  • Scopus rating (2014): CiteScore 3.3 SJR 1.117 SNIP 1.422
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-02-15<br/>Publisher name: Water Alternatives Association

Source: researchoutputwizard
Source ID: 678

Research output: Contribution to journalArticleScientific

Book Review: Time for Customer Orientation in Water Utilities Customer experience management for water utilities. Marketing urban water supply


General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Research group: Capacity Development of Water and Environmental Services CADWES, Civil Engineering
Contributors: Katko, T. S., Rajala, R. P.
Pages: 228-230
Publication date: 2019
Peer-reviewed: No

Publication information

Journal: Public Works Management & Policy
Volume: 24
Issue number: 2
ISSN (Print): 1087-724X
Ratings: 
  • Scopus rating (2019): CiteScore 1.9 SJR 0.448 SNIP 1.183
Original language: English

Research output: Contribution to journalLiterature reviewScientific

Calculation of Induced Electric Fields in Human Models Exposed to ELF Magnetic and Electric Fields

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Tarao, H., Hayashi, N., Korpinen, L., Matsumoto, T., Isaka, K.
Pages: 44-44
Publication date: 2011

Host publication information

Title of host publication: ISH 2011, 17th International Symposium on High Voltage Engineering, August 22-26, 2011, Hannover, Germany
Place of publication: Hannover
Publisher: Leibnitz Universität Hannover
Editors: Gockenbach, E., Eichler, C., Mohsen, F., Fischer, M., Gratz, O., Pham, K., Zhang, X.
ISBN (Print): 978-3-8007-3364-4

Publication series

Name: International Symposium on High Voltage Engineering ISH
Publisher: Leibnitz Universität Hannover

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 7360

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Carbazole-based small molecule electron donors: Syntheses, characterization, and material properties

Efficient synthetic methods for carbazole-based small molecule electron donors with donor–acceptor (D–A) and A–D–A type structures were developed. In order to study the relation between chemical structures and material properties, the prepared compounds were characterized in detail using absorption spectroscopy, differential pulse voltammetry, and computational methods. In addition, symmetrical A–D–A type compounds were tested as an active layer component in bulk heterojunction based organic solar cell (OSC) devices with conventional structure. The results show that the two compound types have many similar properties. However, the extended molecular structure of A–D–A type compounds offer better film forming properties and higher molar absorption coefficients compared with the D–A type materials. Furthermore, the attachment of fluoro substituents in the A units has a positive effect on all solar cell device parameters. Moreover, the computational studies revealed that the molecular structures are twisted between the central carbazole D unit and π-bridge which may result in inefficient intramolecular charge transfer and, also, relatively limited short-circuit currents in OSC devices.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Supramolecular photochemistry, Research group: Chemistry & Advanced Materials, Research Unit of Sustainable Chemistry, IMEC PV Department
Contributors: Sippola, R. J., Hadipour, A., Kastinen, T., Vivo, P., Hukka, T. I., Aernouts, T., Heiskanen, J. P.
Number of pages: 10
Pages: 79-88
Publication date: 8 Nov 2017
Peer-reviewed: Yes
Early online date: 8 Nov 2017

Publication information

Journal: Dyes and Pigments
Volume: 150
Article number: j.dyepig.2017.11.014
ISSN (Print): 0143-7208
Ratings: 
  • Scopus rating (2017): CiteScore 5.6 SJR 0.819 SNIP 1.009
Original language: English
ASJC Scopus subject areas: Chemistry(all), Energy(all)
Keywords: Absorption, DFT, Electron donor, Organic solar cell, Suzuki-Miyaura, Synthesis
Electronic versions: 
URLs: 

Research output: Contribution to journalArticleScientificpeer-review

Cardiac Pacemakers in Electric and Magnetic Fields of 400-kV Power Lines

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Kuisti, H., Elovaara, J., Virtanen, V.
Pages: 422-430
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: PACE: Pacing and Clinical Electrophysiology
Volume: 35
Issue number: 4
ISSN (Print): 0147-8389
Ratings: 
  • Scopus rating (2012): CiteScore 3 SJR 1.197 SNIP 0.908
Original language: Finnish

Bibliographical note

Contribution: organisation=epr,FACT1=1<br/>Publisher name: Wiley-Blackwell Publishing, Inc.

Source: researchoutputwizard
Source ID: 4531

Research output: Contribution to journalArticleScientificpeer-review

Career paths of experts on water supply and sanitation services

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Chemistry and Bioengineering
Contributors: Takala, A. J.
Number of pages: 6
Pages: 1-6
Publication date: 2012

Host publication information

Title of host publication: YWPC2012, 6th IWA International Conference for Young Water Professionals, (IWA YWPC 2012), 10-13 July 2012, Budapest, Hungary. Conference Proceedings
Publisher: IWA, International Water Association; Hungarian Water Utility Association
Article number: IWA-9929

Publication series

Name: International YWP Conference

Bibliographical note

ei ut-numeroa 30.8.2013<br/>Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: IWA, International Water Association; Hungarian Water Utility Association

Source: researchoutputwizard
Source ID: 5388

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Catalytic effect of Ca and K on CO2 gasification of spruce wood char

Gasification is one route to produce chemicals and liquid fuels from biomass. The gasification of the char is catalyzed by alkali and alkaline earth metals in the biomass. In this work the catalytic effect of calcium (Ca) and potassium (K) on CO2 gasification of spruce wood was studied using a thermo gravimetric analyzer (TGA). The ash-forming elements were first removed from the wood using an acid leaching method. Then, various concentrations of K and Ca were absorbed to the wood by ion-exchange to carboxylic and phenolic groups, impregnation of K2CO3 or physically mixing of CaC2O4. The prepared spruce samples were placed in a mesh holder and gasified in the TGA at 850°C in 100% CO2. The results demonstrate that the gasification rate of the char increased linearly with an increase in the concentration of Ca or K. Crystalline CaC2O4 distributed only at the surface of the wood particles resulted in low catalytic activity. The catalytic activity of Ca was higher than K in the beginning of char gasification but the catalytic effect of Ca decreased earlier than the catalytic effect of potassium. Further, the char structure was investigated by SEM-EDX. The SEM analysis from interrupted gasification experiments showed the formation of CaCO3 and K2CO3 layer on the char surface. By adding corresponding levels of Ca and K as the original spruce to the acid washed sample, a similar gasification reactivity was obtained at 850 °C.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio), Abo Akademi University, Åbo Akademi University, University of Jyväskylä, Process Chemistry Center, VTT Technical Research Centre of Finland
Contributors: Perander, M., DeMartini, N., Brink, A., Kramb, J., Karlström, O., Hemming, J., Moilanen, A., Konttinen, J., Hupa, M.
Number of pages: 9
Pages: 464-472
Publication date: 15 Jun 2015
Peer-reviewed: Yes

Publication information

Journal: Fuel
Volume: 150
ISSN (Print): 0016-2361
Ratings: 
  • Scopus rating (2015): CiteScore 6.9 SJR 1.781 SNIP 2.111
Original language: English
ASJC Scopus subject areas: Fuel Technology, Energy Engineering and Power Technology, Chemical Engineering(all), Organic Chemistry
Keywords: Biomass, Calcium, Char reactivity, CO, Gasification, Potassium

Bibliographical note

EXT="Kramb, J."

Source: Scopus
Source ID: 84924100908

Research output: Contribution to journalArticleScientificpeer-review

CFD Based Modelling for Predicting Fouling and Corrosion in Kraft Recovery Boilers

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering, Research group: Power Plant and Combustion Technology
Contributors: Leppänen, A., Välimäki, E., Oksanen, A.
Pages: 1033-1040
Publication date: 2011

Host publication information

Title of host publication: 19th European Biomass Conference and Exhibition, 6-10 June 2011, Berlin Germany
Place of publication: Berlin
Publisher: European Biomass Conference and Exhibition
ISBN (Print): 978-88-89407-55-7

Publication series

Name: European Biomass Conference and Exhibition
Publisher: European Biomass Conference and Exhibition

Bibliographical note

ei ut-numeroa 5.4.2014<br/>Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 6598

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

CFD-modeling of fume formation in kraft recovery boilers

A computational fluid dynamics (CFD) model was developed to simulate alkali metal chemistry and fume particle formation in a kraft recovery boiler. The modeling results were partially validated against previously obtained field measurements. The model provides information about fume composition, chlorine and potassium enrichment factors, and particle mass concentration at different locations in the boiler.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Power Plant and Combustion Technology, Urban circular bioeconomy (UrCirBio), Valmet Technologies Oy, University of Toronto, Canada
Contributors: Leppänen, A., Välimäki, E., Oksanen, A., Tran, H.
Number of pages: 8
Pages: 25-32
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: TAPPI Journal
Volume: 12
Issue number: 3
ISSN (Print): 0734-1415
Ratings: 
  • Scopus rating (2013): SJR 0.425 SNIP 0.651
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-06-29<br/>Publisher name: TAPPI

Source: researchoutputwizard
Source ID: 2768

Research output: Contribution to journalArticleScientificpeer-review

CFD-Modeling of Fume Formation in Kraft Recovery Boilers

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering, Research group: Power Plant and Combustion Technology, Urban circular bioeconomy (UrCirBio), Valmet Technologies Oy, University of Toronto, Canada
Contributors: Leppänen, A., Välimäki, E., Oksanen, A., Tran, H.
Publication date: 2012

Host publication information

Title of host publication: TAPPI PEERS Conference Proceedings 14.-18.10.2012, Savannah, USA
Publisher: TAPPI

Publication series

Name: TAPPI PEERS Conference

Bibliographical note

ei ut-numeroa 21.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: TAPPI

Source: researchoutputwizard
Source ID: 4695

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Challenges to Finnish water and wastewater services in the next 20-30 years

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Life Cycle Effectiveness of the Built Environment (LCE@BE)
Contributors: Heino, O. A., Takala, A. J., Katko, T. S.
Number of pages: 20
Pages: 1-20
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: E-Water
Article number: 2011/01
ISSN (Print): 1994-8549
Ratings: 
  • Scopus rating (2011): SJR 0.172 SNIP 0.669
Original language: English

Bibliographical note

Lehden sivuilla mainittu: Prior to publication, proposed articles are reviewed by two referees from a network of European experts who form the Communication Committee of the EWA.Ei UT-numeroa 8.3.2014<br/>Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 6062

Research output: Contribution to journalArticleScientificpeer-review

Changing energy production structures and CO2 emissions in the ASEAN countries: Decomposition analysis of drivers behind the changes

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Energy and Process Engineering
Contributors: Vehmas, J., Luukkanen, J., Mustonen, S., Kaivo-oja, J., Snäkin, J., Jusi, S.
Pages: 5 p
Publication date: 2008

Host publication information

Title of host publication: International Conference on Energy Security and Climate Change: Issues, Strategies, and Options (ESCC 2008). 6-8 August 2008, Bangkok, Thailand

Bibliographical note

Conference Proceedings CD-Rom<br/>Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 13746

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Characteristics and agronomic usability of digestates from laboratory digesters treating food waste and autoclaved food waste

Digestate characteristics such as organic and nutrient content, hygienic quality and stability are valuable measures when evaluating the use of food waste (FW) digestate as organic fertiliser. This study compared the characteristics of FW and autoclaved (160 °C, 6.2 bar) FW and their digestates from laboratory-scale reactors. Decreased ammonification and low ammonium nitrogen content were observed in the digestate from an autoclaved FW reactor due to autoclave treatment of FW, which affected the nitrogen-containing molecules by formation of Maillard compounds. The methane potential of autoclaved FW and its digestate was decreased by 40% due to reduced microbial activity as microbes were not able to adapt to the conditions within a reactor fed with autoclaved FW. Both studied materials were suitable for agricultural use in terms of their nutrient content, hygienic quality and stability, and thus the decrease in ammonium nitrogen in digestate from an autoclaved FW reactor supported the use of digestate as soil amendment rather than fertiliser.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Urban circular bioeconomy (UrCirBio), Natural Resources Institute Finland (Luke)
Contributors: Tampio, E., Ervasti, S., Rintala, J.
Number of pages: 7
Pages: 86-92
Publication date: 1 May 2015
Peer-reviewed: Yes

Publication information

Journal: Journal of Cleaner Production
Volume: 94
ISSN (Print): 0959-6526
Ratings: 
  • Scopus rating (2015): CiteScore 6.8 SJR 1.635 SNIP 2.396
Original language: English
ASJC Scopus subject areas: Industrial and Manufacturing Engineering, Renewable Energy, Sustainability and the Environment, Environmental Science(all), Strategy and Management
Keywords: Ammonium nitrogen, Autoclave treatment, Characterisation, Digestate, Fertiliser, Food waste

Bibliographical note

EXT="Tampio, Elina"

Source: Scopus
Source ID: 84928768890

Research output: Contribution to journalArticleScientificpeer-review

Characterization and biological stabilization of fine fraction from landfill mining

Landfilling has been the major method to dispose waste for the decades, thus there are thousands of landfills around the world. Landfills contain large amount of resources, which could be used as material or energy. There is an increasing interest for landfill mining which means excavation and processing of waste materials mined from landfills. While previous landfill composition studies have focused especially on metal recovery and combustible materials, they have shown that landfills contain significant amounts of soil type material with small particle size, referred as fine fraction (FF). As redisposal of FF after landfill mining is expensive and causes emissions for decades, FF should be treated to increase value for reuse. The aim of this thesis was to assess in details the characteristics of the FF and to evaluate the effects of different biological treatment methods on stability and characteristics of FF. In this study, FF was sampled from two landfills representing different eras of material consumption and waste management practices: Kuopio, landfilled 2001–2011, and Lohja, landfilled 1967–1989.

The Kuopio landfill was found to contain 38–54 % of FF (< 20 mm) and the Lohja landfill 40–74%. FF contains in various amounts of organic matter (VS 6–27% of TS), nutrients (1.4–8 kg N/t TS, 1–1.5 kg P/t TS) and soluble organic compounds (e.g. 0.5–4.6 kg COD/t TS). The organic matter content, biomethane potential (0.4–27 L CH4/kg TS) and respiration activity (1.4–2.4 g O2/kg TS) were detected to be higher in top layer of new landfill (1–5 years old) while bottom layer of new landfill (6–10 years old) was similar to old landfill (24–46 years old). Biological activity may limit the utilization of FF after landfill mining, thus FF needs to be stabilized to reduce biological activity. Furthermore, FF may also contain hazardous compounds, which needs to be assessed when evaluating the use of FF.

To reduce biological activity of FF, the anaerobic and aerobic stabilization of FF were studied in two laboratory experiments employing simultaneous four leach bed reactors operated for 173–180 days. In anaerobic stabilization, methane production was found to range from 9 to 18 m3 CH4/t VS for FFs from both landfills. Irrigation of FF was necessary for efficient methane production while sludge addition providing both moisture and inoculum deteriorated the characteristics of FF.

Aerobic stabilization reduced more efficiently organic matter content and biological activity from FF compared with anaerobic treatment. Ammonium nitrogen in the leachate was removed rapidly in aerobic treatment due to nitrification. Organic matter and soluble compounds were efficiently removed with continuous water adding, regardless of anaerobic and aerobic conditions, while leachate recirculation introduced those back to the reactor. The scaling up of the anaerobic and aerobic stabilization methods of FF showed that applied technology, for example aeration or irrigation method, and size of treatment area have major effects on the costs of FF treatment. However, anaerobic stabilization and aerobic stabilization with passive aeration without continuous irrigation would have similar costs in similar sites.

In conclusion, FF may need stabilization due to organic matter content and biological activity before utilization. Both anaerobic and aerobic stabilization improved the quality of FF by reducing organic matter content and biological activity. Both treatment methods can be used in full scale stabilization of FF. The treatment of FF has potential to increase the value and usability of FF. Treatment concept and technology should be further optimized in pilot and full scales.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Chemistry and Bioengineering
Contributors: Mönkäre, T.
Number of pages: 68
Publication date: 23 Feb 2018

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-4077-6
ISBN (Electronic): 978-952-15-4087-5
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Volume: 1522
ISSN (Print): 1459-2045

Research output: Book/ReportDoctoral thesisCollection of Articles

Characterization of fine fraction from landfill mining for evaluating methane potential

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Chemistry and Bioengineering
Contributors: Mönkäre, T., Palmroth, M., Rintala, J.
Publication date: 2014

Host publication information

Title of host publication: Fifth International Symposium on Energy from Biomass and Waste, Venice 2014 Proceedings, Island of San Servolo, Venice, Italy, 17-20 November 2014
Place of publication: Italy
Publisher: CISA Publisher
ISBN (Print): 978-88-6265-085-4

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-12-12<br/>Publisher name: CISA Publisher

Source: researchoutputwizard
Source ID: 1098

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Characterization of fine fraction mined from two Finnish landfills

A fine fraction (FF) was mined from two Finnish municipal solid waste (MSW) landfills in Kuopio (1- to 10-year-old, referred as new landfill) and Lohja (24- to 40-year-old, referred as old landfill) in order to characterize FF. In Kuopio the FF (<20mm) was on average 45±7% of the content of landfill and in Lohja 58±11%. Sieving showed that 86.5±5.7% of the FF was smaller than 11.2mm and the fraction resembled soil. The total solids (TS) content was 46-82%, being lower in the bottom layers compared to the middle layers. The organic matter content (measured as volatile solids, VS) and the biochemical methane potential (BMP) of FF were lower in the old landfill (VS/TS 12.8±7.1% and BMP 5.8±3.4m3 CH4/t TS) than in the new landfill (VS/TS 21.3±4.3% and BMP 14.4±9.9m3 CH4/t TS), and both were lower compared with fresh MSW. In the Kuopio landfill materials were also mechanically sieved in the full scale plant in two size fraction <30mm (VS/TS 31.1% and 32.9m3 CH4/t TS) and 30-70mm (VS/TS 50.8% and BMP 78.5m3 CH4/t TS). The nitrogen (3.5±2.0g/kg TS), phosphorus (<1.0-1.5g/kg TS) and soluble chemical oxygen demand (COD) (2.77±1.77kg/t TS) contents were low in all samples. Since FF is major fraction of the content of landfill, the characterization of FF is important to find possible methods for using or disposing FF mined from landfills.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Mönkäre, T. J., Palmroth, M. R. T., Rintala, J. A.
Number of pages: 6
Pages: 34-39
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: Waste Management
Volume: 47A
ISSN (Print): 0956-053X
Ratings: 
  • Scopus rating (2016): CiteScore 6.4 SJR 1.407 SNIP 2.191
Original language: English
ASJC Scopus subject areas: Waste Management and Disposal
Keywords: Biochemical methane potential, Characterization, Fine fraction, Landfill mining, Municipal solid waste
Electronic versions: 
URLs: 
Source: Scopus
Source ID: 84958845557

Research output: Contribution to journalArticleScientificpeer-review

Chasing measurements for real-world emissions of city buses

General information

Publication status: Published
Organisations: Physics, Research area: Aerosol Physics, Research group: The Instrumentation, Emissions, and Atmospheric Aerosols Group, Atmospheric Composition Research, Finnish Meteorological Institute, Helsinki Region Environmental Services Authority (HSY), Department of Environmental Sciences, Helsinki University
Contributors: Järvinen, A., Karjalainen, P., Bloss, M., Potila, O., Simonen, P., Kuuluvainen, H., Timonen, H., Saarikoski, S., Niemi, J. V., Keskinen, J., Rönkkö, T.
Publication date: 2017
Peer-reviewed: Unknown
Event: Paper presented at European Aerosol Conference 2017, Zürich, Switzerland.
ASJC Scopus subject areas: Automotive Engineering, Pollution, Energy (miscellaneous)
Keywords: Exhaust emissions, bus emissions, Air quality

Research output: Other conference contributionPaper, poster or abstractScientific

CO2 reduction costs and benefits in transport: socio-technical scenarios

The transport sector produces 23% of greenhouse gas (GHG) emissions globally. While the mitigation of climate change requires GHG emissions to be drastically reduced, the emissions from the transport sector are expected to grow. The purpose of this study is to produce alternative scenarios which meet the target of 80% CO2 emission reduction by 2050 for the Finnish transport sector and to analyse the carbon abatement potentials, costs and benefits of the required behavioural and technological measures. We found that the most cost-efficient measure for the society is to support a shift from private car use to shared car use through increasing car-sharing and ride-sharing. Aiming to reach the emission reduction targets solely through technological measures would require a rapid uptake of alternative energies and the society would not receive the possible benefits, including health benefits, energy savings and fixed car cost savings.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Transport Research Centre Verne, Civil Engineering
Contributors: Liimatainen, H., Pöllänen, M., Viri, R.
Number of pages: 12
Publication date: 21 Dec 2018
Peer-reviewed: Yes

Publication information

Journal: European Journal of Futures Research
Volume: 2018
Issue number: 6:22
ISSN (Print): 2195-4194
Ratings: 
  • Scopus rating (2018): CiteScore 0.3 SJR 0.13 SNIP 0.119
Original language: English
Keywords: Transport, GHG emissions, Emission reduction, Costs, Benefits, Scenarios

Research output: Contribution to journalArticleScientificpeer-review

Coal char combustion in O2/N2 and O2/CO2 conditions in a drop tube reactor: an optical study

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering, Urban circular bioeconomy (UrCirBio)
Contributors: Rodriguez Avila, M., Honkanen, M., Raiko, R., Oksanen, A.
Number of pages: 22
Pages: 1-22
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Industrial Combustion
Article number: 201201
ISSN (Print): 2075-3071
Ratings: 
  • Scopus rating (2012): CiteScore 0.4 SJR 0.14 SNIP 0.183
Original language: English

Bibliographical note

ei ut-numeroa 29.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: International Flame Research Foundation, IFRF

Source: researchoutputwizard
Source ID: 5185

Research output: Contribution to journalArticleScientificpeer-review

Combining mineral fractions of recovered MSWI bottom ash: improvement for utilization in civil engineering structures

In real-life construction projects, the utilization of different types of waste derived aggregates can often be falsely considered as utilization, but in fact, it is merely dumping the potentially high value material from one site to another. For example, building highway noise barriers with waste derived aggregates cannot be considered as utilization. In this study, a more advanced approach was chosen in order to create aggregate like products from recovered municipal solid waste incineration (MSWI) bottom ash (BA) and thus potentially increase their value and image in civil engineering applications. MSWI BA from one waste incineration plant in Finland was first treated with a Dutch dry treatment technology called ADR (Advanced Dry Recovery). This process separates non-ferrous and ferrous metals from MSWI BA and generates mineral fractions of different grain sizes. These mineral fractions may not be used separately, for example, in the unbound structural layers of roads due to the strict grain size distribution requirements of these civil engineering structures. Hence, different combinations were designed from these BA mineral fractions using the mathematical proportioning of aggregates. The aim was to create aggregate like products from this waste material for different structural layers (filtration, sub-base and base) of, for example, road and field structures. Three mixtures were chosen based on their correspondence to the grain size distribution requirements of natural aggregates and further analyzed in the laboratory from their technical, mechanical and environmental point of view. The leaching of chrome (Cr) and chloride (Cl-) exceeded the Finnish emission boundary values for utilization of certain types of ashes in civil engineering. On the other hand, the technical and mechanical properties of these mixed bottom ash products were considered suitable to be used, for example, in the unbound structural layers of the interim storage field in a waste treatment center. In such location, also the leaching potential of harmful substances can be further studied and verified in a larger scale.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Earth Constructions, Research area: Infrastructure Construction, Suomen Erityisjäte Oy
Contributors: Sormunen, L. A., Kalliainen, A., Kolisoja, P., Rantsi, R.
Number of pages: 12
Publication date: 22 Aug 2016
Peer-reviewed: Yes

Publication information

Journal: Waste and Biomass Valorization
ISSN (Print): 1877-2641
Ratings: 
  • Scopus rating (2016): CiteScore 2.1 SJR 0.451 SNIP 0.668
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Commercialising reclaimed materials in earthworks – guidelines for productization and the process of appending these materials in the Finnish national code of practice

To decrease the use of non-renewable natural resources as well as environmental effects of earth-works, natural aggregate materials can be replaced with recycled materials acquired from surplus soil, industrial by-products and waste, etc. When wishing to increase the usage of these reclaimed materials (=“UUMA”-material), the usage must be straightforward for developers, designers and constructors alike. To make this possible, the materials must have design guidelines for their appro-priate applications. They must be productized and CE marked or otherwise authorized, and the con-struction guidelines for the materials must be included in the Finnish general specifications for in-frastructural construction works (InfraRYL). As productization is especially important in increasing the usage of UUMA materials, guidelines for vendors are being drawn that present information on commercializing reclaimed materials to be used in earthworks. The guidelines for productization are being prepared in the Finnish national UUMA2 programme (2013-2017, www.uuma2.fi), which was created to promote the use of recycled materials in earthworks.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering, Research area: Infrastructure Construction, Research group: Earth Constructions, Research group: Track Structures, Ramboll Finland Ltd.
Contributors: Koivisto, K., Forsman, J., Ronkainen, M., Lahtinen, P., Kolisoja, P., Kuula, P.
Number of pages: 10
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the 17th Nordic Geotechnical Meeting Reykjavik Iceland : Challenges in Nordic Geotechnic 25th - 28th of May
Place of publication: Reykjavik
Publisher: Icelandic Geotechnical Society
ISBN (Electronic): 978-9935-24-002-6

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Comparative analysis and discussion

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P. S., Katko, T. S.
Pages: 219-240
Publication date: 2005

Host publication information

Title of host publication: Water, Time and European Cities. History matters for the Futures
Place of publication: Tampere
Publisher: Tampere University Press
Editors: Juuti, P. S., Katko, T. S.
ISBN (Print): 951-44-6337-4

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 18528

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Comparing the energy required for fine grinding torrefied and fast heat treated pine

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering, Urban circular bioeconomy (UrCirBio)
Contributors: Kokko, L., Tolvanen, H., Hämäläinen, K., Raiko, R.
Pages: 219-223
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Biomass & Bioenergy
Volume: 42
Issue number: Jul
ISSN (Print): 0961-9534
Ratings: 
  • Scopus rating (2012): CiteScore 5.1 SJR 1.516 SNIP 1.725
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1<br/>Publisher name: Elsevier Ltd.

Source: researchoutputwizard
Source ID: 4515

Research output: Contribution to journalArticleScientificpeer-review

Comparison between the Oocupational ELF magnetic field exposure in Finland and in Italy

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Lahtinen, S., Gobba, F.
Pages: 2 p
Publication date: 2011

Host publication information

Title of host publication: 10th International Conference European Bioelectromagnetics Association, 21-24 February 2011, Rome, Italy
Place of publication: Rome
Publisher: European Bioelectromagnetics Association

Publication series

Name: International Conference European Bioelectromagnetics Association
Publisher: European Bioelectromagnetics Association

Bibliographical note

ei ut-numeroa 22.3.2014<br/>Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 6419

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Comparison of air pressure difference, air change rates, and CO2 concentrations in apartment buildings before and after energy retrofits

Impacts of energy retrofits on air pressure differences across building envelope, air change rate (ACR), and indoor carbon dioxide (CO2) concentrations were studied. Measurements were performed before and after the retrofits of multi-family buildings during heating season in two Northern European countries: Finland and Lithuania. In the Finnish case buildings (Napartments = 128), pressure differences against outdoor were within national guideline values before the retrofits in 52% and after the retrofits in 42% of the buildings with mechanical exhaust ventilation system. The values were within the guidelines before the retrofits in 33% and after the retrofits in 20% in buildings with natural ventilation, correspondingly. In the Lithuanian case buildings (N-apartments = 31), pressure differences against outdoor were within the same guideline values before the retrofits in 77% and after the retrofits in 52% of the buildings. After the retrofits, higher air pressure differences and ACR, as well as lower CO2 concentrations, were observed in Finnish buildings with mechanical ventilation. On the contrary, lower air pressure differences and ACR, as well as higher CO2 concentrations, were observed in Lithuanian buildings with natural ventilation. (C) 2017 Elsevier Ltd. All rights reserved.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Concrete and Bridge Structures, Research area: Structural Engineering, Kaunas Univ Technol, Kaunas University of Technology, Dept Environm Technol, Natl Inst Hlth & Welf, Finland National Institute for Health & Welfare, Dept Hlth Protect
Contributors: Leivo, V., Prasauskas, T., Turunen, M., Kiviste, M., Aaltonen, A., Martuzevicius, D., Haverinen-Shaughnessy, U.
Number of pages: 8
Pages: 85-92
Publication date: 2017
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 120
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2017): CiteScore 7.7 SJR 2.169 SNIP 2.583
Original language: English
Electronic versions: 
URLs: 

Research output: Contribution to journalArticleScientificpeer-review

Comparison of community managed projects and conventional approaches in rural water supply of Ethiopia

This study aimed to compare Community Managed Projects (CMP) approach with the conventional approaches (Non-CMP) in the case of Ethiopia. The data collection methods include a household survey (n=1806), community representative interviews (n=49), focus group discussions with district water experts (n=48) and observations of water systems (n=49). The data were collected from seven districts of two regions of Ethiopia. The study shows that CMP have a better platform to involve the community than non-CMP. In terms of reducing distances to water points, all approaches succeeded. However, the intended amount of water supplied is not achieved in all the cases: only 25% of CMP users and 18% of non-CMP users are able to get water according to the national standard, 15 L per capita per day. Fee collection in the approaches has a high disparity in favour of CMP. To keep long-lasting services, three requirements need to be particularly fulfilled: quantity, quality and accessibility.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Community-Led Accelerated WASH (COWASH) Project
Contributors: Behailu, B. M., Suominen, A., Katko, T. S., Mattila, H., Yayehyirad, G.
Number of pages: 15
Pages: 292-306
Publication date: 30 Sep 2016
Peer-reviewed: Yes

Publication information

Journal: African Journal of Environmental Science and Technology
Volume: 10
Issue number: 9
Article number: 04AF23059936
ISSN (Print): 1996-0786
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Comparison of the total mercury content in sediment samples with a mercury sensor bacteria test and Vibrio fischeri toxicity test

The suitability of a luminescent bacterial sensor strain Escherichia coli MC1061(pTOO11) [Virta, M.; Lampinen, J.; Karp, M. Anal Chem 1995, 67, 667-669] for the measuring of mercury from sediment samples was evaluated. The sensor strain is based on the control of expression of a reporter gene, firefly luciferase, by a mercury sensitive regulation unit. The sensor responds to mercury by increased luminescence as a consequence of increased production of the reporter protein luciferase. The method is simple to perform since the luminescence is recorded with a portable luminometer and the sensor bacteria are freeze-dried. The results obtained from river sediment samples were compared with the total mercury content of the samples, which was measured by atomic absorption spectrometry and Leco(R) Mercury analyzer and the modified photobacteria luminescence inhibition test (Lappalainen, J.; Juvonen, R.; Vaajasaari, K.; Karp, M. Chemosphere 1999, 38, 1069-1083). The correlation between the bacterial sensor results with the total mercury content, ranging from 0.01 mg/kg to 16 mg/kg, was significant with 32 samples tested (R-2 UP to 0.8115). There was no correlation between the total mercury content and toxicity measured with Vibrio fischeri in this sample panel, (C) 2000 by John Wiley & Sons, Inc.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: University of Turku
Contributors: Lappalainen, J. O., Karp, M. T., Juvonen, R., Virta, M. P. J., Nurmi, J.
Number of pages: 6
Pages: 443-448
Publication date: Dec 2000
Peer-reviewed: Yes

Publication information

Journal: Environmental Toxicology
Volume: 15
Issue number: 5
ISSN (Print): 1520-4081
Ratings: 
  • Scopus rating (2000): SJR 0.623 SNIP 1.106
Original language: English
Keywords: heavy metal, biosensor, mercury, sediment, REPORTER, ARSENITE, ENVIRONMENT, ANTIMONITE, BIOSENSOR, STRAIN
Source: WOS
Source ID: 000165446600012

Research output: Contribution to journalArticleScientificpeer-review

Comparison the portable service platforms influence to electric field exposure at 110 kV substations

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Pääkkönen, R., Kuisti, H., Gonzalez, J. A., Tarao, H., Gobba, F., Korpinen, L.
Pages: 215-217
Publication date: 2012

Host publication information

Title of host publication: The Bioelectromagnetics Society 34th Annual Meeting, June 17, 2012 - June 22, 2012, Brisbane, Australia
Publisher: The Bioelectromagnetics Society
ISBN (Print): 978-0-646-57844-6

Publication series

Name: The Bioelectromagnetics Society Annual Meeting

Bibliographical note

ei ut-numeroa 27.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: The Bioelectromagnetics Society

Source: researchoutputwizard
Source ID: 4996

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Conclusions

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P. S., Katko, T. S., Vuorinen, H. S.
Pages: 259-262
Publication date: 2007

Host publication information

Title of host publication: 2007. Environmental History of Water - Global views on community water supply and sanitation. IWA Publishing
Editors: Juuti P.S., K. T., Vuorinen, H.

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14494

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Conclusions

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P. S., Katko, T. S., Vuorinen, H. S.
Pages: 501-506
Publication date: 2007

Host publication information

Title of host publication: 2007. Environmental History of Water - Global views on community water supply and sanitation. IWA Publishing
Editors: Juuti P.S., K. T., Vuorinen, H.

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14495

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Conclusions

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P. S., Katko, T. S., Vuorinen, H. S.
Pages: 93-96
Publication date: 2007

Host publication information

Title of host publication: 2007. Environmental History of Water - Global views on community water supply and sanitation. IWA Publishing
Editors: Juuti P.S., K. T., Vuorinen, H.

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14493

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Conclusions: Does History Matter? Present Water Governance Challenges and Future Implications

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P. S., Katko, T. S., Vuorinen, H. S.
Pages: 589-592
Publication date: 2007

Host publication information

Title of host publication: 2007. Environmental History of Water - Global views on community water supply and sanitation. IWA Publishing
Editors: Juuti P.S., K. T., Vuorinen, H.

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14496

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Continuous removal and recovery of tellurium in an upflow anaerobic granular sludge bed reactor

Continuous removal of tellurite (TeO32−) from synthetic wastewater and subsequent recovery in the form of elemental tellurium was studied in an upflow anaerobic granular sludge bed (UASB) reactor operated at 30 °C. The UASB reactor was inoculated with anaerobic granular sludge and fed with lactate as carbon source and electron donor at an organic loading rate of 0.6 g COD L−1 d−1. After establishing efficient and stable COD removal, the reactor was fed with 10 mg TeO32−. L−1 for 42 d before increasing the influent concentration to 20 mg TeO32−. L−1. Tellurite removal (98 and 92%, respectively, from 10 and 20 mg Te. L−1) was primarily mediated through bioreduction and most of the removed Te was retained in the bioreactor. Characterization using XRD, Raman spectroscopy, SEM-EDX and TEM confirmed association of tellurium with the granular sludge, typically in the form of elemental Te(0) deposits. Furthermore, application of an extracellular polymeric substances (EPS) extraction method to the tellurite reducing sludge recovered up to 78% of the tellurium retained in the granular sludge. This study demonstrates for the first time the application of a UASB reactor for continuous tellurite removal from tellurite-containing wastewater coupled to elemental Te(0) recovery.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Mal, J., Nancharaiah, Y. V., Maheshwari, N., van Hullebusch, E. D., Lens, P. N.
Number of pages: 9
Pages: 79-88
Publication date: Apr 2017
Peer-reviewed: Yes
Early online date: 26 Dec 2016

Publication information

Journal: Journal of Hazardous Materials
Volume: 327
ISSN (Print): 0304-3894
Ratings: 
  • Scopus rating (2017): CiteScore 10.8 SJR 1.787 SNIP 1.988
Original language: English
Keywords: Tellurite, Bioreduction, Te(0), recovery, anaerobic granular sludge, UASB reactor
Source: RIS
Source ID: urn:72FA4ADA003E818A81B125B5D178D7F6

Research output: Contribution to journalArticleScientificpeer-review

Conversion of Solid Waste into Functional Carbon Materials: A Review

Population explosion and increasing living standard of people resulted in generation of more than a Giga ton of waste per annum worldwide. Hence waste is one of the global problems in 21st century and expected that waste generation continues in future also. Every human activity is left with some waste. There are some major sectors for waste generation, such as manufacturing sector, agricultural sector (in the form of biomass) and municipality waste etc. These wastes are having minimal value or even negative values and creating problem or burden to the environment, human health etc. Therefore, it is utmost important to process and manage those wastes properly. The existing waste management processes involves: recycling, dumping and landfilling, incineration/combustion etc., which are neither sufficient to nullify the adverse effect of the waste nor economic process. These management processes involve human intervention and thereby resulting huge expenses. Nowadays, there is a paradigm shift from management of waste into conversion of waste producing fertilizer, fuel, energy as well as carbon materials etc. In this review, effort is given exclusively to summarize the different processes of waste conversion into functional carbon material such as activated carbon, porous carbon, carbon nanotube, graphene, carbon dot, carbon fibre etc. It has been discussed with the help of illustrative examples from the literatures.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Materials Science, Research group: Plastics and Elastomer Technology
Contributors: Gogoi, M., Layek, R., Vuorinen, J., Mahato, M.
Pages: 52-68
Publication date: 1 Mar 2017
Peer-reviewed: Yes

Publication information

Journal:  Energy and Environment Focus
Volume: 6
Issue number: 1
ISSN (Print): 2326-3040
Original language: English

Research output: Contribution to journalReview ArticleScientificpeer-review

Co-operation between technical education of university and electro-technical standardization association

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Hieta-Wilkman, S., Vesa, J., Korpinen, L.
Pages: 165-168
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Elektronika ir Elektrotechnika
Volume: 10
Issue number: 106
ISSN (Print): 1392-1215
Ratings: 
  • Scopus rating (2010): SJR 0.216 SNIP 0.329
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 8075

Research output: Contribution to journalArticleScientificpeer-review

Co-production of 1,3 propanediol and long-chain alkyl esters from crude glycerol

Crude glycerol is an excellent carbon source for bacterial production systems. Bacterial fermentation often generates by-products that can offer an additional carbon pool to improve the product profile for optimal valorization. In this study, the properties of two phylogenetically distinct bacteria, Acinetobacter baylyi ADP1 and Clostridium butyricum, were coupled in a one-pot batch process to co-produce 1,3 propanediol (PDO) and long-chain alkyl esters (wax esters, WEs) from crude glycerol. In the process, A. baylyi deoxidized the growth medium allowing glycerol fermentation and PDO production by C. butyricum. Reaeration of the co-cultivations enabled A. baylyi to metabolize the fermentation by-products, acetate and butyrate, and synthesize intracellular WEs. To improve PDO production and A. baylyi growth, carbon and macronutrients in the growth medium were screened and optimized using Plackett-Burman and Box-Behnken models. The validation experiment revealed a good correlation between the observed and predicted values. The salting-out method recovered 89.5% PDO from the fermentation broth and in vacuo extraction resulted in a PDO content of 5.3 g L-1. Nuclear magnetic resonance revealed a WE content and yield of 34.4 ± 1.4 mg L-1 and 34.2 ± 3.2 mg WE g-1 dry cell weight, respectively. A molar yield of 0.65 mol PDO mol-1 and 0.62 µmol WE mol-1 crude glycerol was achieved with the synthetic consortium. This work emphasizes the strength of response surface methodology in improving production processes from the mutualistic association of divergent bacterial species in consortium. The co-production of PDO and WEs from crude glycerol is demonstrated for the first time in this study.

General information

Publication status: E-pub ahead of print
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy
Contributors: Mangayil, R., Efimova, E., Konttinen, J., Santala, V.
Number of pages: 9
Pages: 81-89
Publication date: 11 Jul 2019
Peer-reviewed: Yes

Publication information

Journal: New Biotechnology
Volume: 53
ISSN (Print): 1871-6784
Ratings: 
  • Scopus rating (2019): CiteScore 7.8 SJR 0.949 SNIP 1.224
Original language: English

Bibliographical note

Copyright © 2019. Published by Elsevier B.V.

Source: PubMed
Source ID: 31302257

Research output: Contribution to journalArticleScientificpeer-review

Cracking of the End Diaphragm of a Post-tensioned Beam Bridge

In concrete beam bridges, the end diaphragm at the end of the bridge is a common structural component that connects the main beams and transfers the beam loads to the bridge bearings. In integral bridges the end diaphragm also retains the soil of embankments due to the absence of abutments. Cracking of the front surface on the end diaphragm has been detected in post-tensioned beam bridges in Finland and Sweden. Presumably the post-tensioning of the bridge and the shaping and detailing of the connection of the end diaphragm and main beam have an effect on cracking tendency. The aim of this study is to examine the structural behaviour and the cracking potential of end diaphragms using linear analysis of the post-tensioned bridge and to find measures to prevent the cracking.

The observations collected through field surveys are compared to results of linear FE analysis to clarify the cause of the cracking. The verification of model is performed by comparison of patterns of cracking observed in field surveys and the distribution of maximum tensile stresses in the FE model. With model variations, the effectiveness of measures for the prevention of cracking are
observed.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Concrete and Bridge Structures, Research group: Vaativat rakenteet, A-Insinöörit Civil Oy
Contributors: Kuusela, M., Asp, O., Laaksonen, A.
Number of pages: 15
Pages: 89-104
Publication date: 28 Aug 2019
Peer-reviewed: Yes

Publication information

Journal: Nordic Concrete Research
Volume: 60
Issue number: 1
Article number: 6
ISSN (Print): 0800-6377
Original language: English
Keywords: Bridge,, post-tensioning,, cracking., concrete,, end diaphragm,

Bibliographical note

EXT="Kuusela, Mikko"

Research output: Contribution to journalArticleScientificpeer-review

Dags att syna utmaningarna inom vattenförsörjningen

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Chemistry and Bioengineering
Contributors: Katko, T. S.
Number of pages: 2
Pages: 30-31
Publication date: 2013
Peer-reviewed: Unknown

Publication information

Journal: Finlands Kommuntidning
Volume: 19
Issue number: 8
ISSN (Print): 1235-9343
Original language: Swedish

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-02-15<br/>Publisher name: Finlands Kommunförbund

Source: researchoutputwizard
Source ID: 2518

Research output: Contribution to journalArticleProfessional

Denitrifying microbial communities along a boreal stream with varying land-use

Streams have an important role in regulating nitrogen (N) transportation from terrestrial ecosystems to downstream waters. Here, we examined how catchment land-use affects potential denitrification rates and the function and composition of denitrifier communities in boreal stream sediments, using stable isotope incubations and qPCR and 454-pyrosequencing targeted on nirS, nirK and nosZ genes. Although land-use influenced the water chemistry as higher nitrite + nitrate (NO x ) concentration at the agriculture-affected sampling point, sediment organic matter content was found to be the key factor in regulating potential denitrification rates. However, the abundance as well as the diversity and community composition of denitrifying microbes, and genetic N2O production potential (the ratio between nirS + nirK and nosZ gene abundances) were connected to both NO x and sediment quality. Overall, our results suggest that catchment land-use-driven changes in N and carbon availability affect the denitrification rates, and possibly N2:N2O production ratio, in boreal streams, through altering denitrifier abundance and community composition.

General information

Publication status: E-pub ahead of print
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, University of Jyväskylä, University of Eastern Finland, University of Helsinki, University of Jyväskylä
Contributors: Aalto, S. L., Saarenheimo, J., Arvola, L., Tiirola, M., Huotari, J., Rissanen, A. J.
Publication date: 24 Jul 2019
Peer-reviewed: Yes

Publication information

Journal: Aquatic Sciences
Volume: 81
Issue number: 59
ISSN (Print): 1015-1621
Ratings: 
  • Scopus rating (2019): CiteScore 4.7 SJR 0.981 SNIP 1.058
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Design aspects of all atomic layer deposited TiO2–Fe2O3 scaffold-absorber photoanodes for water splitting

Iron and titanium oxides have attracted substantial attention in photoelectrochemical water splitting applications. However, both materials suffer from intrinsic limitations that constrain the final device performance. In order to overcome the limitations of the two materials alone, their combination has been proposed as a solution to the problems. Here we report on the fabrication of an atomic layer deposited (ALD) Fe2O3 coating on porous ALD-TiO2. Our results show that successful implementation requires complete mixing of the TiO2 and Fe2O3 layers via annealing resulting in the formation of a photoactive iron titanium oxide on the surface. Moreover, we found that incomplete mixing leads to crystallization of Fe2O3 to hematite that is detrimental to the photoelectrochemical performance. IPCE and transient photocurrent measurements performed using UV and visible light excitation confirmed that the iron titanium oxide extends the photocurrent generation to the visible range. These measurements were complemented by transient absorption spectroscopy (TAS), which revealed a new band absent in pristine hematite or anatase TiO2 that we assign to charge transfer within the structure. Taken together, these results provide design guidelines to be considered when aiming to combine TiO2 and Fe2O3 for photoelectrochemical applications.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Chemistry & Advanced Materials, Research group: Surface Science, Photonics, Materials Science, Research group: Plastics and Elastomer Technology
Contributors: Hiltunen, A., Ruoko, T., Iivonen, T., Lahtonen, K., Ali-Löytty, H., Sarlin, E., Valden, M., Leskelä, M., Tkachenko, N.
Pages: 2124-2130
Publication date: 31 Jul 2018
Peer-reviewed: Yes

Publication information

Journal: Sustainable Energy & Fuels
Volume: 2
Issue number: 9
ISSN (Print): 2398-4902
Ratings: 
  • Scopus rating (2018): CiteScore 3.1 SNIP 0.85
Original language: English
ASJC Scopus subject areas: Electrochemistry, Renewable Energy, Sustainability and the Environment, Surfaces, Coatings and Films
Keywords: Water splitting, Atomic layer deposition (ALD), Titanium dioxide, Hematite, Cellulose, Template

Research output: Contribution to journalArticleScientificpeer-review

Detecting bioavailable toxic metals and metalloids from natural water samples using luminescent sensor bacteria

We have generated microbial sensors for analyzing the presence of various metals or metalloids by recombinant DNA technology. The strains are based on strictly regulated promoters controlling the expression of the firefly luciferase gene in microbial cells. The regulator-reporter constructs are located in shuttle plasmids capable of replicating in gram-negative or -positive microbial organisms. The sensors developed are real-time indicators of metal responsive gene expression giving results in approximately 30 min, with optimal induction times ranging from 60 to 240 min. We describe here the performance of these metal sensing bacteria for the assessment of different water samples spiked with lead, arsenic, mercury or cadmium. We show that these bacteria are sensitive detectors of metal bioavailability, which is difficult or even impossible to measure by traditional analytical chemistry methods. All measurements were done using freeze-dried bacteria, which makes these sensors reagent-like and also easy to use in field conditions. (C) 2000 Elsevier Science Ltd. All rights reserved.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Univ Turku, University of Turku, Dept Biotechnol
Contributors: Tauriainen, S. M., Virta, M. P. J., Karp, M. T.
Number of pages: 6
Pages: 2661-2666
Publication date: Jul 2000
Peer-reviewed: Yes

Publication information

Journal: Water Research
Volume: 34
Issue number: 10
ISSN (Print): 0043-1354
Ratings: 
  • Scopus rating (2000): SJR 1.308 SNIP 1.639
Original language: English
Keywords: luciferase, luc-gene, environment, cadmium, mercury, arsenite, ESCHERICHIA-COLI, ARSENITE, LUCIFERASE, ANTIMONITE, MERCURY, LEAD, EXPRESSION, BIOSENSOR, CADMIUM, GENES
Source: WOS
Source ID: 000087436600004

Research output: Contribution to journalArticleScientificpeer-review

Deterioration mechanisms and life cycle of concrete monoblock railway sleepers in Finnish conditions

Thirty eight sleepers aged 30 to 40 years old were removed from Finnish railway lines and were loaded. Twelve new sleepers were also tested. The old sleepers fulfilled most of the requirements specified for the new ones. The old sleepers were also much more resistant to loading than predicted by structural calculations. The purpose of field tests was to establish the role of traffic loads in the life-cycle of sleepers: the actual stresses and moments in sleepers due to traffic loads; the distribution of the load through the underside of the sleeper to the ballast; and the variation in ballast-sleeper reaction on different sections of track in different seasons. Strain changes at the top surfaces of sleepers were measured on tracks while the rail was loaded by passing trains. Ballast-sleeper reactions tended to be concentrated under the rail along a length of sleeper of approximately 350 mm towards the centre of the track. The mean bending moments determined at the rail seat and centre of sleepers were about ±2.5 kNm, and the maximum moments were up to ±10 kNm. The purpose of fatigue loading tests was to analyse the long term properties of the sleepers and the effect of fatigue on the stiffness of sleepers. Several load levels were chosen in order to estimate the significance of the fatigue in a real operating situation. The fatigue limit determined based on the loading tests and the computational limit state of crack formation were clearly higher than the bending moments measured in the field tests.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Civil Engineering, Research group: Vaativat rakenteet, Research group: Concrete and Bridge Structures, Research group: Track Structures
Contributors: Kerokoski, O., Rantala, T., Nurmikolu, A.
Publication date: 31 May 2016

Host publication information

Title of host publication: WCRR 2016 Proceedings : 11th World congress on railway research, 29.5-2.6.2016, Milano

Bibliographical note

ei isbn 8.12.16

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Developing and testing characterization methods for droplet combustion - Part I

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Pääkkönen, A., Peltola, A., Pitkänen, A., Mäkiranta, R., Saario, A., Oksanen, A.
Number of pages: 6
Pages: 1-6
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Archivum Combustionis
Volume: 30
Issue number: 4
ISSN (Print): 0208-4198
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 8921

Research output: Contribution to journalArticleScientificpeer-review

Developing and testing characterization methods for droplet compustion - part II

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Pääkkönen, A., Pitkänen, A., Mäkiranta, R., Saario, A., Oksanen, A.
Number of pages: 10
Pages: 1-10
Publication date: 2011

Host publication information

Title of host publication: 9th European Conference on Industrial Furnaces and Boilers, Estoril, Portugal, 26-29 April, 2011
Place of publication: Estoril
Publisher: INFUB

Publication series

Name: European Conference on Industrial Furnaces and Boilers
Publisher: INFUB

Bibliographical note

ei ut-numeroa 26.4.2014<br/>Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 6938

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Developing community water services and cooperation in Finland and the South

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Katko, T. S., Rautavaara, A.
Number of pages: 5
Pages: 240-244
Publication date: 2013

Host publication information

Title of host publication: Free Flow - Researching Water Security Through Cooperation
Publisher: United Nations Educational, Scientific and Cultural Organization; Unesco Publishing; Tudor Rose
Editors: Griffiths, J., Lambert, R.
ISBN (Print): 978-92-3-104256-0

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-11-29

Source: researchoutputwizard
Source ID: 2525

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Development of an assessment protocol: the impact of energy retrofits on indoor environmental quality and public health in the existing building stock

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Concrete and Bridge Structures, Research area: Structural Engineering, Department of Civil Engineering, Research group: Building Physics, Kaunas Univ Technol, Kaunas University of Technology, Dept Environm Technol, Natl Inst Hlth & Welf, Finland National Institute for Health & Welfare, Dept Environm Hlth
Contributors: Du, L., Leivo, V., Kiviste, M., Martuzevicius, D., Turunen, M., Prasauskas, T., Haverinen-Shaughnessy, U.
Publication date: May 2015

Host publication information

Title of host publication: Healthy Buildings 2015 Europe (HB 2015)
Publisher: International Society for Indoor Air Quality and Climate
ISBN (Print): 978-0-9846855-4-7

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Development of superhydrophobic coating on paperboard surface using the Liquid Flame Spray

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering, Department of Physics
Contributors: Teisala, H., Tuominen, M., Aromaa, M., Mäkelä, J. M., Stepien, M., Saarinen, J., Toivakka, M., Kuusipalo, J.
Pages: 436-445
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Surface and Coatings Technology
Volume: 205
Issue number: 2
ISSN (Print): 0257-8972
Ratings: 
  • Scopus rating (2010): SJR 1.145 SNIP 1.661
Original language: English

Bibliographical note

Contribution: organisation=epr pap,FACT1=0.5<br/>Contribution: organisation=fys,FACT2=0.5

Source: researchoutputwizard
Source ID: 9386

Research output: Contribution to journalArticleScientificpeer-review

Digestate valorization for bioremediation of petroleum hydrocarbons contaminated soils

Petroleum contaminated soils constitute an environmental issue which may be solved with the help of bioremediation. Soil bioaugmentation with petroleum degrading microorganisms is an efficient clean-up strategy. Currently scientific interest is focused on searching new sources of microorganisms able to degrade hydrocarbons which serve as species pools for enrichments during inoculum preparation. Bioaugmentation strategy are especially important in soils with
low level of organic matter and low microbial counts (e.g. after intensive chemical treatments). No studies were performed up to date while considering the potential of organic fertilizers and amendments as a microbial seeding source for bioremediation. In this thesis, for the first time, digestate as an example of organic amendment, was studied in terms of indigenous microbial
community which can be involved in degradation of linear hydrocarbons. Digestate is an organic by-product of biogas production via anaerobic digestion processes and has a great potential as soil fertilizer due to concentrated nutrients and low content of easily biodegradable compounds (which could be used by bacteria as a preferential carbon source over hydrocarbons). However, the potential of microbial community of digestate was never studied in terms of petroleum hydrocarbons (PHCs) degradation.

In this thesis, digestate was examined as microbial seeding for bioremediation of weathered petroleum hydrocarbon contaminated soils. The goals were : I) to check the presence of alkanes degrading bacteria in digestate enrichments and compare alkanes degradation potential with enrichments from petroleum contaminated soils, ii) verify the effect of digestate application on soil microbial community and microbial activity, iii) study the presence of functional genes
responsible for alkanes degradation (alkB genes) in digestate and amended soils.

During the first experiment, 7 microbial enrichments were developed from various digestates (including composted digestate), a petroleum contaminated soil and from mix of soil with digestate. After 3 weeks of incubation the highest diesel fuel removal was observed for enrichments originating from composted digestate and from the petroleum contaminated soil (78 and 77 % diesel fuel removal, respectively). Enrichments obtained from digestate mixed with soil displayed lower performance than single source enrichments. In all enrichments,
presence of alkB genes was promoted during the incubation. The experiment revealed the presence of alkB genes in bacteria from digestate and confirmed their ability to degrade diesel fuel.

In a second experiment, 6 different treatments were performed in microcosm using two industrial petroleum contaminated soils having different textures: a clay rich soil and a sandy soil. After 30 days of incubation, the highest petroleum hydrocarbons removal was observed in microcosms containing: digestate together with bulking agent (17.8 % and 12.7 % higher than control in clay rich soil and sandy soil, respectively) or; digestate together with immobilized bacteria (13.4 % and 9 % higher than control in clay rich soil and sandy soil, respectively). Distinct microbial groups were formed in amended and non-amended soils. Genera containing species able to degrade hydrocarbons like Acinetobacter and Mycobacterium were abundant in digestate and soil amended with digestate. The study proved that digestate contains high concentration of alkB genes, significantly higher than contaminated soils. Application of digestate significantly increased the level of alkB genes in soils which remained high during the treatment.

In a third experiment, a contaminated soil was incubated with digestate and bulking agent (used to increase porosity of soil mixture and facilitate air transfer) in bioreactors with active aeration. Initial alkB concentration was 1.5 % in contaminated soil and 4.5 % in digestate. During incubation of soil with digestate, alkB percentage increased up to 11.5 % and after additional
inoculation with immobilized bacteria this value increased up to 60 % (alkB percentage for treatment with mineral nutrients reached 0.4 %). Addition of digestate positively affected soil respiration and bacterial density, which was concomitant with enhanced hydrocarbons degradation. Incubation of soil with digestate for 2 months resulted in 74 % of hydrocarbons removal, while extra addition of immobilized bacteria increased this value to 95 %. Digestate
increased soil bacterial density and diversity of hydrocarbons degrading taxa. The experiment clearly revealed the advantage of digestate over mineral fertilizer due to soil enrichment in TPH degrading taxa and thus a more efficient bioremediation.

This thesis for the first time analysed the potential of indigenous bacteria from organic nutrient source in bioremediation. The obtained results proved that digestate is a good source of bacteria caring alkB genes curtail in alkanes metabolism. Moreover, observed population of bacterial caring alkB genes was significantly greater in digestate comparing to contaminated soils. Application of digestate allowed to increase microbial activity and maintain high content of
alkB genes in the soil which enhanced PHCs degradation.

Experiments performed during the thesis are contributing for better understanding of bioremediation process with the use of organic amendment as a nutrient source. Presented advantages of digestate over mineral fertilizers were evaluated and confirmed. This thesis for the first time proposes organic amendment, like digestate to be considered not only as a nutrient source but also as a valuable source of microorganisms for soil bioaugmentation/biostimulation. Developed experimental treatments are a good starting point for further assessment of digestate during field scale treatments, however detailed risk assessment analysis including effect of potential pathogens contained in digestate on human health and studies analysing the effect of digestate leachates on groundwater quality need to be performed.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Materials Science and Environmental Engineering
Contributors: Gielnik, A.
Number of pages: 95
Publication date: 11 Dec 2019

Publication information

Publisher: Tampere University
Original language: English

Publication series

Name: Tampere University Dissertations
URLs: 

Research output: Book/ReportDoctoral thesisCollection of Articles

Diversity of microcystin-producing cyanobacteria in spatially isolated regions of Lake Erie

The diversity of microcystin-producing cyanobacteria in the western basin of Lake Erie was studied using sequence analysis of mcyA gene fragments. Distinct populations of potentially toxic Microcystis and Planktothrix were found in spatially isolated locations. This study highlights previously undocumented diversity of potentially toxic cyanobacteria.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: The University of Tennessee, Knoxville
Contributors: Rinta-Kanto, J. M., Wilhelm, S. W.
Number of pages: 3
Pages: 5083-5085
Publication date: Jul 2006
Peer-reviewed: Yes

Publication information

Journal: Applied and Environmental Microbiology
Volume: 72
Issue number: 7
ISSN (Print): 0099-2240
Ratings: 
  • Scopus rating (2006): SJR 2.076 SNIP 1.6
Original language: English
Source: Mendeley
Source ID: 5780da10-f76e-31e8-b554-bfc0ff481d10

Research output: Contribution to journalArticleScientificpeer-review

Diversity of the water supply and sanitation sector: roles of municipalities in Europe

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Pietilä, P.
Number of pages: 13
Pages: 99-111
Publication date: 2013

Host publication information

Title of host publication: Water Services Management and Governance : Lessons for a Sustainable Future
Publisher: IWA Publishing
Editors: Katko, T. S., Juuti, P. S., Schwartz, K., Rajala, R. P.
ISBN (Print): 978-1-78040-022-8
ISBN (Electronic): 978-1-78040-073-0

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-09-29

Source: researchoutputwizard
Source ID: 3150

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Dry Toilet Sanitation as an Alternative Solution to the Rural Ethiopia

This paper intended to explore the sanitation situation of the rural Ethiopia and evaluate how the existing situation can welcome dry toilet as an alternative for sanitation. The study was based on the field survey, literature reviews and field observation during November-December of 2012 and 2013, and June 2014. The survey found out that a lot has been done in the area, but it is too early to declare that the question is solved. In terms of DT sanitation policy and promotion intra-ministerial collaborations are improving. Moreover, the traditional use of night soil for the crops that are eaten cooked is an interesting part to be taken into account when considering dry toilet.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Civil Engineering
Contributors: Behailu, B. M.
Number of pages: 7
Publication date: Aug 2015

Host publication information

Title of host publication: Dry Toilet 2015 : 5th International Dry Toilet Conference

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Dynamics of microbial communities in untreated and autoclaved food waste anaerobic digesters

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Blasco, L., Kahala, M., Tampio, E., Ervasti, S., Paavola, T., Rintala, J., Joutsjoki, V.
Number of pages: 7
Pages: 3-9
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Anaerobe
Volume: 29
ISSN (Print): 1075-9964
Ratings: 
  • Scopus rating (2014): CiteScore 4.1 SJR 1.015 SNIP 1.153
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-06-27<br/>Publisher name: Academic Press; Anaerobe Society of the Americas, Inc.

Source: researchoutputwizard
Source ID: 178

Research output: Contribution to journalArticleScientificpeer-review

Ecological Sanitation - A Logical Choice? The Development of the Sanitation Institution in a World Society

Sustainability, encompassing ecological, economic as well as sociocultural aspects, has become a driving force for many political and administrational decisions. It is no longer enough to follow old practices or rely on profit margins – it is necessary to consider the needs of society and nature in a more holistic way as a larger whole. Sustainability is the key word also in terms of sanitation; ecological sanitation, or ecosan for short, has come to mark the sustainable approach to handling human excreta.

In 2014, there are still approximately 2.5 billion people in the world without access to adequate sanitation; 1.1 billion practice open defecation. Lack of sanitation is often – but not necessarily – linked to lack of clean drinking water and poor hygiene. However, poor wastewater treatment also occurs in more developed countries as well as in times of crisis. In the case of natural disasters, even waterborne sanitation, which is often considered the norm, does not prevent the risk of contamination from pathogens. Ecological sanitation aims at a closed cycle of nutrients and absence of water; dry toilets, composting and urine diversion help to return nutrients back into the soil.

Based on these challenges, it is necessary to examine alternatives to the current toilet institution that considers waterborne sanitation as the norm. This dissertation explores the feasibility of ecological sanitation as a potential alternative to the mainstream option and the aim is to discover which issues affect the development and change of the current waterborne toilet institution. From a multi- and interdisciplinary point of view, the dissertation determines the various aspects affected by ecosan, such as water and environment, health, culture, education, agriculture, business and technology, and from these points of view develops futures scenarios for sustainable sanitation practices. Technology is here defined beyond artefacts and processes encompassing also knowhow as well as the sociotechnical systems of use, including legislation, culture and practices.

The data collected for this research includes expert interviews (n=11), case studies from Ethiopia, Finland, New Zealand and Zambia, and literature review including various policy documents and legislation of the aforementioned case countries to shed light to the current state of ecological sanitation and how it is taken into account from a legal perspective. In addition, a two-round consensus-Delphi survey (n1=44, n2=22) together with theme seminars was conducted among Finnish experts to determine the future potential of ecological sanitation.

Through qualitative data analyses, the potential futures and desirable outcomes are mapped with the help of futures research and environmental scanning. The overall challenge of potentially changing the waterborne toilet institution is discussed in the light of the World Polity Theory – with the understanding that global norms are valid everywhere and that change eventually must start from intergovernmental actors rather than political decision makers.

This research brings more insight to the relatively unknown and overlooked subject of ecological sanitation. The integrated approach offers new insight into sustainable sanitation practices and closed loop approach from view points of the various sectors of society, including social, economic and ecological aspects. The undisputed challenges of inadequate sanitation facilities faced by 2.5 billion people worldwide are generally not recognized in scientific literature, although several invaluable studies have contributed to the field. Still, concrete results for improvement are still required.

The results of this study find that ecological sanitation must be approached from a multidisciplinary point of view in order to understand the variety of sectors impacted by these sustainable practices. As a conclusion it can be stated that the traditional norms in waterborne sanitation are difficult to change but the pressure of limited phosphorus resources and deteriorating or non-existing infrastructure require alternative solutions to the norm. As yet, legislation has generally not allowed or considered the use of human excreta as fertiliser, but practices are slowly changing along with attitudes. Institutions do not change easily but can do so while attitudes, policies and practices all start adopting new ways of operating.

It is possible that in the future ecological sanitation will indeed be accepted as a feasible option along with other sanitation methods. This is supported also by the increasing need for sustainable practices in societies. However, in more daunting futures the lack of closed cycles will lead to shortages in resources as well as the lack of wellbeing in communities without access to sanitation. Thus, the research of sustainable sanitation solution is significant and necessary – also in the future.

General information

Publication status: Published
MoE publication type: G4 Doctoral dissertation (monograph)
Organisations: Department of Chemistry and Bioengineering
Contributors: O'Neill, M.
Number of pages: 236
Publication date: 7 Mar 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3467-6
ISBN (Electronic): 978-952-15-3472-0
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1284
ISSN (Print): 1459-2045

Bibliographical note

INT=keb,"O'Neill,Mia"

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Source: researchoutputwizard
Source ID: 123456789/22778

Research output: Book/ReportDoctoral thesisMonograph

Economic analysis of hydrogen production by methane thermal decomposition: Comparison to competing technologies

This study is a comparative analysis of hydrogen production costs in current and potential future market environments. The economic feasibility of hydrogen production by thermal decomposition of methane was compared to two other technologies, namely steam methane reforming and water electrolysis. According to the results, thermal decomposition of methane would be most suited for on-site demand-driven hydrogen production in small or medium industrial scale. Hydrogen production by thermal decomposition of methane would be economically competitive with steam reforming with a product carbon value of at least 280-310 EUR/tonne. By contrast, the main benefit of thermal decomposition of methane in comparison with water electrolysis is the feedstock availability via the current natural gas infrastructure, whereas electrolysis is highly dependent on the cost and availability of renewable electricity. The major factors affecting the economic feasibility were identified as product carbon value in thermal decomposition of methane, natural gas cost in steam reforming, and electricity cost in electrolysis. Thus, the effect of these variables on the hydrogen production costs was analyzed. Additionally, the specific carbon dioxide emissions in hydrogen production by thermal decomposition of methane (40 kgCO2/MWhH2) were found to be much less that by steam reforming coupled with carbon dioxide capture from the syngas (133 kgCO2/MWhH2).

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Bio- and Circular Economy
Contributors: Keipi, T., Tolvanen, H., Konttinen, J.
Number of pages: 10
Pages: 264-273
Publication date: 1 Mar 2018
Peer-reviewed: Yes

Publication information

Journal: Energy Conversion and Management
Volume: 159
ISSN (Print): 0196-8904
Ratings: 
  • Scopus rating (2018): CiteScore 12.4 SJR 2.73 SNIP 2.181
Original language: English
Keywords: Methane decomposition, hydrogen, economic analysis, carbon dioxide emissions

Research output: Contribution to journalArticleScientificpeer-review

Editorial

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Civil Engineering
Contributors: Länsivaara, T.
Number of pages: 1
Publication date: 17 Dec 2018
Peer-reviewed: No

Publication information

Journal: Environmental Geotechnics
Volume: 5
Issue number: 6
ISSN (Print): 2051-803X
Ratings: 
  • Scopus rating (2018): CiteScore 3.4 SJR 0.602 SNIP 0.899
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Environmental Chemistry, Water Science and Technology, Geotechnical Engineering and Engineering Geology, Waste Management and Disposal, Geochemistry and Petrology, Nature and Landscape Conservation, Management, Monitoring, Policy and Law
Source: Scopus
Source ID: 85059019429

Research output: Contribution to journalEditorialScientific

Editorial. Central role of water in society and community

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Chemistry and Bioengineering
Contributors: Katko, T.
Pages: 8-11
Publication date: 2011
Peer-reviewed: No

Publication information

Journal: Ympäristöhistoria: Finnish Journal of Environmental History
Volume: 1
Issue number: 2
ISSN (Print): 1799-6953
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: International Environmental History Group (IEHG)

Source: researchoutputwizard
Source ID: 6325

Research output: Contribution to journalArticleScientific

Editorial Note: "Pasts and Futures of Water"

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Juuti, P. S., Katko, T. S., Vinnari, E. M.
Pages: 167-171
Publication date: 2010
Peer-reviewed: No

Publication information

Journal: Environment and History
Volume: 16
Issue number: a
ISSN (Print): 0967-3407
Ratings: 
  • Scopus rating (2010): SJR 0.195 SNIP 0.93
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8246

Research output: Contribution to journalArticleScientific

Editorial to “The best papers from the 32nd International Symposium on Automation and Robotics in Construction and Mining (ISARC 2015)”

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Civil Engineering, Research group: Responsible Construction, Univ of Oulu
Contributors: Malaska, M., Heikkilä, R.
Number of pages: 1
Pages: 1
Publication date: 1 Nov 2016
Peer-reviewed: No

Publication information

Journal: Automation in Construction
Volume: 71
ISSN (Print): 0926-5805
Ratings: 
  • Scopus rating (2016): CiteScore 7.8 SJR 1.395 SNIP 2.754
Original language: English
ASJC Scopus subject areas: Control and Systems Engineering, Civil and Structural Engineering, Building and Construction
Source: Scopus
Source ID: 84988322453

Research output: Contribution to journalEditorialScientific

Education, Research and Capacity Building for Water Services

General information

Publication status: Published
Organisations: Department of Chemistry and Bioengineering
Contributors: Katko, T.
Publication date: 20 Sep 2012
Peer-reviewed: Unknown
Event: Paper presented at UNESCO Chair in Sustainable Water Services (UNECWAS) seminar 2012, 20.9.2012, Tampere, Finland, .

Research output: Other conference contributionPaper, poster or abstractScientific

Effect of geometrical parameters on vortex-induced vibration of a splitter plate

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Pärssinen, T., Eloranta, H., Saarenrinne, P.
Number of pages: 9
Pages: 1-9
Publication date: 2009
Peer-reviewed: Yes

Publication information

Journal: Journal of Fluids Engineering: Transactions of the ASME
Volume: 131
Issue number: 3, 031203
ISSN (Print): 0098-2202
Ratings: 
  • Scopus rating (2009): SJR 0.546 SNIP 1.039
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 11068

Research output: Contribution to journalArticleScientificpeer-review

Effect of heavy metal co-contaminants on selenite bioreduction by anaerobic granular sludge

This study investigated bioreduction of selenite by anaerobic granular sludge in the presence of heavy metals and analyzed the fate of the bioreduced selenium and the heavy metals. Selenite bioreduction was not significantly inhibited in the presence of Pb(II) and Zn(II). More than 92% of 79 mg/L selenite was removed by bioreduction even in the presence of 150 mg/L of Pb(II) or 400 mg/L of Zn(II). In contrast, only 65-48% selenite was bioreduced in the presence of 150-400 mg/L Cd(II). Formation of elemental selenium or selenide varied with heavy metal type and concentration. Notably, the majority of the bioreduced selenium (70-90% in the presence of Pb and Zn, 50-70% in the presence of Cd) and heavy metals (80-90% of Pb and Zn, 60-80% of Cd) were associated with the granular sludge. The results have implications in the treatment of selenium wastewaters and biogenesis of metal selenides.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, UPEM, Bhabha Atomic Research Centre, Environmental Engineering and Water Technology Department, UNESCO-IHE Institute for Water Education
Contributors: Mal, J., Nancharaiah, Y. V., van Hullebusch, E. D., Lens, P. N. L.
Number of pages: 8
Pages: 1-8
Publication date: 1 Apr 2016
Peer-reviewed: Yes

Publication information

Journal: Bioresource Technology
Volume: 206
ISSN (Print): 0960-8524
Ratings: 
  • Scopus rating (2016): CiteScore 9.9 SJR 2.215 SNIP 1.945
Original language: English
ASJC Scopus subject areas: Bioengineering, Environmental Engineering, Waste Management and Disposal
Keywords: Anaerobic granular sludge, Biosorption, Heavy metal removal, Metal selenide, Selenite bioreduction
Source: Scopus
Source ID: 84961305364

Research output: Contribution to journalArticleScientificpeer-review

Effect of HRT on nitrogen recovery from real reject water in a 3-chamber bioelectroconcentration cell

General information

Publication status: Published
MoE publication type: Not Eligible
Organisations: Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy, University of Queensland
Contributors: Koskue, V., Rinta-Kanto, J., Ledezma, P., Freguia, S., Kokko, M.
Publication date: 7 Oct 2019
Peer-reviewed: Unknown
Event: Paper presented at ISMET 7, Okinawa, Japan.

Research output: Other conference contributionPaper, poster or abstractScientific

Effect of N/S ratio on anoxic sulfide oxidizing bioreactors

Hydrogen sulfide (H2S) removal from biogas using anoxic bioprocesses are economic and efficient compared to physico-chemical H2S removal or other biogas upgrading technologies. Most of these biotechnologies have used nitrate-reducing, sulfide-oxidizing bacteria (NR-SOB) as the dominant microorganism for H2S removal. Anoxic sulfide removal technologies have been widely applied for both liquid and gaseous pollutants, particularly for biogas clean-up, because it is more practically applicable than the conventional aerobic systems in terms of ease of use and operational costs (Almenglo et al. 2016; Fernández et al. 2014; Soreanu et al., 2008). In this study, the performance of an attached growth bioreactor, i.e. a fluidized bed reactor (FBR) and a combined attached and suspended growth bioreactor, i.e. a moving bed bioreactor (MBBR), were tested under different operating conditions and the bioreactors were compared for their ability to perform sulfur oxidation coupled to autotrophic denitrification.In anoxic sulfide-oxidizing reactors, a crucial factor is the nitrogen/sulfur (N/S) ratio, which affects the metabolism of nitrate-reducing, sulfide-oxidizing bacteria (NR-SOB) and the ratio of the end products of sulfide oxidation such as elemental sulfur and sulfate. Thus, the objective of this study was to evaluate the effect of the N/S ratio on the thiosulfate removal efficiency in two different anoxic biofilm bioreactors, i.e. a MBBR and a FBR, as shown in Figure 1. Both the lab-scale MBBR and FBR were operated for 250 days, at room temperature (~20 ºC) and at a feed pH of 7.0 ± 0.2. The dissolved oxygen (DO) concentrations in the MBBR and FBR were 0.51 ± 0.09 and 0.26 ± 0.06 mg L-1, respectively. The FBR used in this study was previously used for thiosulfate-driven denitrification (Di Capua et al. 2017). The MBBR was inoculated by using the biomass obtained from that FBR containing Thiobacillus denitrificans as the dominant microorganism. The performance of the MBBR and FBR were evaluated under three different N/S ratios (0.5, 0.3 and 0.1). Thiosulfate was used as a substrate for sulfide-oxidizing bacteria at a constant concentration of 200 mg S-S2O32- L-1, whereas the concentration of the electron acceptor, nitrate, was decreased stepwise from 40 to 10 mg N-NO3- L-1. The performances of the MBBR and FBR can be compared in Table 1. The removal efficiency of thiosulfate was > 98% and nitrate was completely consumed during the operational time in both bioreactors at N/S ratio of 0.5. Under the nitrate-limiting conditions tested, i.e. N/S ratio of 0.3 and 0.1, the thiosulfate removal efficiencies in the MBBR (83.4 and 37.8%) were higher than those observed in the FBR (77.8 and 26.1%), resulting in a higher sulfate production.The higher DO concentrations observed in the MBBR compared to the FBR likely played a role in enhancing thiosulfate oxidation due to T. denitrificans, a dominant microorganism in the inoculum, being a facultative anaerobe which enables to use oxygen as alternative e- acceptor to oxidize the thiosulfate. Additionally, it was probably because of the different bioreactor configuration and mixing conditions.

Conclusions

The MBBR and FBR can be operated at room temperature (~20 ºC) for achieving high removal efficiencies of thiosulfate (> 98%), under autotrophic denitrification conditions, at a HRT of 5 h, feed pH of 7 and a N/S ratio of 0.5. However, the MBBR resulted in higher thiosulfate oxidation rates than the FBR after the nitrate-limiting conditions were applied. The reactor performance at a N/S ratio of 0.1 and the evaluation of the microbial community composition at different N/S ratios require further investigation.

General information

Publication status: Published
Organisations: Chemistry and Bioengineering, Research group: Bio- and Circular Economy, Department of civil and Mechanical Engineering, University of Cassino and Southern Lazio, UNESCO-IHE Institute for Water Education, Delft
Contributors: Khanongnuch, R., Di Capua, F., Lakaniemi, A., R. Rene, E., Lens, P. N. L.
Publication date: 19 Jul 2017
Peer-reviewed: Unknown
Event: Paper presented at Biotechniques 2017, La Coruña, Spain.
Keywords: Biological desulfurization, Sulfide oxidizing bacteria (SOB), Autotrophic denitrification, Moving bed biofilm reactor (MBBR), Fluidized bed biofilm reactor (FBR)
Additional files: 

Research output: Other conference contributionPaper, poster or abstractScientific

Effect of particle size and dispersion status on cytotoxicity and genotoxicity of zinc oxide in human bronchial epithelial cells

Data available on the genotoxicity of zinc oxide (ZnO) nanoparticles (NPs) are controversial. Here, we examined the effects of particle size and dispersion status on the cytotoxicity and genotoxicity of nanosized and fine ZnO, in the presence and absence of bovine serum albumin (BSA; 0.06%) in human bronchial epithelial BEAS-2B cells. Dynamic light scattering analysis showed the most homogenous dispersions in water alone for nanosized ZnO and in water with BSA for fine ZnO. After a 48-h treatment, both types of ZnO were cytotoxic within a similar, narrow dose range (1.5-3.0 μg/cm2) and induced micronuclei at a near toxic dose range (1.25-1.75 μg/cm2), both with and without BSA. In the comet assay, nanosized ZnO (1.25-1.5 μg/cm2), in the absence of BSA, caused a statistically significant increase in DNA damage after 3-h and 6-h treatments, while fine ZnO did not. Our findings may be explained by better uptake or faster intracellular dissolution of nanosized ZnO without BSA during short treatments (3-6 h; the comet assay), with less differences between the two ZnO forms after longer treatments (>48 h; the in vitro micronucleus test). As ZnO is genotoxic within a narrow dose range partly overlapping with cytotoxic doses, small experimental differences e.g. in the dispersion of ZnO particles may have a substantial effect on the genotoxicity of the nominal doses added to the cell culture.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Materials Science, Research group: Materials Characterization, Nofer Institute of Occupational Medicine, University of Zaragoza, Finnish Institute of Occupational Health
Contributors: Roszak, J., Catalán, J., Järventaus, H., Lindberg, H. K., Suhonen, S., Vippola, M., Stepnik, M., Norppa, H.
Number of pages: 12
Pages: 7-18
Publication date: 1 Jul 2016
Peer-reviewed: Yes

Publication information

Journal: Mutation Research: Genetic Toxicology and Environmental Mutagenesis
Volume: 805
ISSN (Print): 1383-5718
Ratings: 
  • Scopus rating (2016): CiteScore 4.5 SJR 0.927 SNIP 0.972
Original language: English
ASJC Scopus subject areas: Health, Toxicology and Mutagenesis, Genetics
Keywords: DNA damage, Genotoxicity, Micronucleus, Nanoparticle, Zinc oxide
Source: Scopus
Source ID: 84973346011

Research output: Contribution to journalArticleScientificpeer-review

Effect of Temperature on Fume Formation and Deposition in Kraft Recovery Boilers - a Modeling Approach

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Chemistry and Bioengineering, Research group: Power Plant and Combustion Technology, University of Toronto, Canada, Valmet Technologies Oy
Contributors: Leppänen, A., Tran, H., Välimäki, E., Oksanen, A.
Number of pages: 10
Pages: 38-47
Publication date: 2014

Host publication information

Title of host publication: 2014 International Chemical Recovery Conference, Proceedings - Volume 2
Publisher: Suomen Soodakattilayhdistys, The Finnish Recovery Boiler Committee; TAPPI
Editors: Nieminen, M., Lampinen, P.
ISBN (Print): 978-952-68166-0-9
ISBN (Electronic): 978-952-28166-1-6

Bibliographical note

2014 International Chemical Recovery Conference, 9-12 June, 2014, Tampere, Finland<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-06-27<br/>Publisher name: Suomen Soodakattilayhdistys, The Finnish Recovery Boiler Committee; TAPPI

Source: researchoutputwizard
Source ID: 923

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Effect of Tissue Conductivity on Internal Body Resistances of Numerical Human Model at Power Frequency

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Tarao, H., Hayashi, N., Korpinen, L., Gonzalez, J. A., Matsumoto, T., Isaka, K.
Pages: 197-199
Publication date: 2012

Host publication information

Title of host publication: The Bioelectromagnetics Society 34th Annual Meeting, June 17, 2012 - June 22, 2012, Brisbane, Australia
Publisher: The Bioelectromagnetics Society
ISBN (Print): 978-0-646-57844-6

Publication series

Name: The Bioelectromagnetics Society Annual Meeting

Bibliographical note

Contribution: organisation=epr,FACT1=1<br/>Publisher name: The Bioelectromagnetics Society

Source: researchoutputwizard
Source ID: 5403

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Effects of tissue conductivity and electrode area on internal electric fields in a numerical human model for ELF contact current exposures

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Tarao, H., Kuisti, H., Korpinen, L., Hayashi, N., Isaka, K.
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Physics in Medicine and Biology
Volume: 57
Issue number: 10
ISSN (Print): 0031-9155
Ratings: 
  • Scopus rating (2012): CiteScore 5.5 SJR 1.592 SNIP 1.719
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1<br/>Publisher name: Institute of Physics Publishing Ltd.

Source: researchoutputwizard
Source ID: 5404

Research output: Contribution to journalArticleScientificpeer-review

Electricity generation from tetrathionate in microbial fuel cells by acidophiles

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Sulonen, M. L., Kokko, M. E., Lakaniemi, A., Puhakka, J. A.
Number of pages: 8
Pages: 182-189
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Journal of Hazardous Materials
Volume: 284
ISSN (Print): 0304-3894
Ratings: 
  • Scopus rating (2015): CiteScore 9 SJR 1.633 SNIP 1.948
Original language: English

Bibliographical note

Available online 3 November 2014 : Volume 284, 2 March 2015, Pages 182-189<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-12-12

Source: researchoutputwizard
Source ID: 1560

Research output: Contribution to journalArticleScientificpeer-review

Electricity production by a microbial fuel cell fueled by brewery wastewater and the factors in its membrane deterioration

Electricity production from brewery wastewater using dual-chamber microbial fuel cells (MFCs) with a tin-coated copper mesh in the anode was investigated by changing the hydraulic retention time (HRT). The MFCs were fed with wastewater samples from the inlet (inflow, MFC-1) and outlet (outflow, MFC-2) of an anaerobic digester of a brewery wastewater treatment plant. Both chemical oxygen demand removal and current density were improved by decreasing HRT. The best MFC performance was with an HRT of 0.5 d. The maximum power densities of 8.001 and 1.843 µW/cm<sup>2</sup> were obtained from reactors MFC-1 and MFC-2, respectively. Microbial diversity at different conditions was studied using PCR-DGGE profiling of 16S rRNA fragments of the microorganisms from the biofilm on the anode electrode. The MFC reactor had mainly Geobacter, Shewanella, and Clostridium species, and some bacteria were easily washed out at lower HRTs. The fouling characteristics of the MFC Nafion membrane and the resulting degradation of MFC performance were examined. The ion exchange capacity, conductivity, and diffusivity of the membrane decreased significantly after fouling. The morphology of the Nafion membrane and MFC degradation were studied using scanning electron microscopy and attenuated total reflection-Fourier transform infrared spectroscopy.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Portland State University, Department of Civil and Environmental Engineering, Yildiz Technical University
Contributors: Çetinkaya, A. Y., Köroğlu, E. O., Demir, N. M., Baysoy, D. Y., Özkaya, B., Çakmakçi, M.
Number of pages: 9
Pages: 1068-1076
Publication date: 20 Jul 2015
Peer-reviewed: Yes

Publication information

Journal: Chinese Journal of Catalysis
Volume: 36
Issue number: 7
ISSN (Print): 0253-9837
Ratings: 
  • Scopus rating (2015): CiteScore 3.4 SJR 0.579 SNIP 0.805
Original language: English
ASJC Scopus subject areas: Catalysis, Chemistry(all)
Keywords: Anaerobic processe, Biofilm, Microbial community, Microbial fuel cell, Wastewater treatment

Bibliographical note

EXT="Çakmakçi, Mehmet"

Source: Scopus
Source ID: 84934932934

Research output: Contribution to journalArticleScientificpeer-review

Elimination of arsenic-containing emissions from gasification of chromated copper arsenate wood

The behavior of arsenic in chromated copper arsenate containing wood during gasification was modeled using thermodynamic equilibrium calculations. The results of the model were validated using bench-scale gasification tests. It is shown that over 99.6% of arsenic can be removed from the product gas by a hot filter when the gas is cooled below the predicted condensation temperature.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Energy Technology and Thermal Process Chemistry, Gasification Technologies Inc., Gas Technology Institute
Contributors: Kramb, J., Konttinen, J., Backman, R., Salo, K., Roberts, M.
Number of pages: 6
Pages: 319-324
Publication date: 1 Oct 2016
Peer-reviewed: Yes

Publication information

Journal: Fuel
Volume: 181
ISSN (Print): 0016-2361
Ratings: 
  • Scopus rating (2016): CiteScore 7.8 SJR 1.736 SNIP 2.206
Original language: English
ASJC Scopus subject areas: Fuel Technology, Energy Engineering and Power Technology, Chemical Engineering(all), Organic Chemistry
Keywords: Arsenic, CCA wood, Equilibrium modeling, Gasification
Source: Scopus
Source ID: 84965081806

Research output: Contribution to journalArticleScientificpeer-review

Enabling and Integrative Infrastructure Policy: The Role of Inverse Infrastructures in Local Infrastructure Provision with Special Reference to Finnish Water Cooperatives

Infrastructures are necessary to support the functionality of urban communities. Globalization, increased polycentricity, new trends in governance and tightening public budgets have increased interest in alternative ways of providing such infrastructures. One product of this trend is the ‘inverse infrastructure,’ which refers to a modularized, semi-autonomous and user-driven infrastructure that is a result of the self-organization of local actors. In this study, we discuss the nature of such infrastructures and the challenges they pose to local infrastructure policy with special reference to the case of water cooperatives in Finland. Our conclusion is that inverse infrastructures have a potential to contribute to local infrastructure services either as cost-effective alternative or as supplement to large technical systems. Their full utilization requires, however, enabling and integrative infrastructure policy.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Chemistry and Bioengineering, University of Tampere
Contributors: Heino, O., Anttiroiko, A.
Publication date: 28 Nov 2014

Publication information

Publisher: MPRA
Original language: English

Publication series

Name: MPRA Paper
No.: 60276
Keywords: Infrastructure, Infrastructure policy, Public policy , Local government , Inverse infrastructure, Complex adaptive system, Adaptation, Self-Organization, Resilience, Volunteering, Water services, Water cooperative, Finland

Research output: Book/ReportCommissioned reportProfessional

Energistä utopiaa?

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Sorri, J.
Number of pages: 2
Pages: 38-39
Publication date: 2017
Peer-reviewed: No

Publication information

Journal: Futura
Volume: 36
Issue number: 1
ISSN (Print): 0785-5494
Original language: Finnish

Research output: Contribution to journalBook/Film/Article reviewScientific

Engineering and kinetic aspects of bacterial uranium reduction for the remediation of uranium contaminated environments

Biological reduction of soluble uranium from U(VI) to insoluble U(IV) coupled to the oxidation of an electron donor (hydrogen or organic compounds) is a potentially cost-efficient way to reduce the U concentrations in contaminated waters to below regulatory limits. A variety of microorganisms originating from both U contaminated and non-contaminated environments have demonstrated U(VI) reduction capacity under anaerobic conditions. Bioreduction of U(VI) is considered especially promising for in situ remediation, where the activity of indigenous microorganisms is stimulated by supplying a suitable electron donor to the subsurface to contain U contamination to a specific location in a sparingly soluble form. Less studied microbial biofilm-based bioreactors and bioelectrochemical systems have also shown potential for efficient U(VI) reduction to remove U from contaminated water streams. This review compares the advantages and challenges of U(VI)-reducing in situ remediation processes, bioreactors and bioelectrochemical systems. In addition, the current knowledge of U(VI) bioreduction mechanisms and factors affecting U(VI) reduction kinetics (e.g. pH, temperature, and the chemical composition of the contaminated water) are discussed, as both of these aspects are important in designing efficient remediation processes.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy
Contributors: Lakaniemi, A., Douglas, G. B., Kaksonen, A. H.
Pages: 198 - 212
Publication date: 5 Jun 2019
Peer-reviewed: Yes

Publication information

Journal: Journal of Hazardous Materials
Volume: 371
ISSN (Print): 0304-3894
Ratings: 
  • Scopus rating (2019): CiteScore 13.1 SJR 2.01 SNIP 2.159
Original language: English
Keywords: Uranium, remediation, Bioreactor, Bioelectrochemical system, Biofilm, Reduction rate

Bibliographical note

EXT="Kaksonen, Anna H."

Source: Bibtex
Source ID: LAKANIEMI2019198

Research output: Contribution to journalArticleScientificpeer-review

Enhancement in Lifespan of Halide Perovskite Solar Cells

While perovskite solar cells have skyrocketed in recent years to power conversion efficiencies competitive with those of silicon and thin-film photovoltaics, the lagged behind stability stands in the way of commercialisation. In this review, we discuss the reasons and factors that induce the degradation in photovoltaic performance of perovskite solar cells, and furthermore, we summarise the most promising strategies to enhance the lifespan. We show that each component of the device, including charge selective contacts, perovskite layer, and electrodes, can be engineered to reduce the influence of heat, UV light, oxygen, moisture and their synergetic effect on the operating lifetime of devices. We conclude that inorganic contacts and inorganic perovskite compositions are the most promising direction toward stable perovskite solar cells.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Chemistry and Bioengineering, Research group: Chemistry & Advanced Materials, Helmholtz Zentrum Berlin Mat & Energie, Helmholtz Association, Helmholtz-Zentrum Berlin (HZB), Sapienza University, Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian 350002, China., Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Fuorigrotta, Naples Italy
Contributors: Wang, Q., Phung, N., Di Girolamo, D., Vivo, P., Abate, A.
Pages: 865-886
Publication date: Mar 2019
Peer-reviewed: Yes
Early online date: 7 Dec 2018

Publication information

Journal: Energy & Environmental Science
Volume: 12
Issue number: 3
ISSN (Print): 1754-5692
Ratings: 
  • Scopus rating (2019): CiteScore 56 SJR 13.024 SNIP 4.706
Original language: English
Keywords: perovskite solar cells, stability, lifetime

Research output: Contribution to journalReview ArticleScientificpeer-review

Ensimmäiset fuusiosuunnitelmat

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: University of Tampere
Contributors: Juuti, P., Rajala, R.
Pages: 39-76
Publication date: 2009

Host publication information

Title of host publication: Vesihuoltoyhteistyötä yli rajojen : PK-seudun yhteistyöhankkeet ja yhdistämissuunnitelmat ennen ja nyt Espoon näkökulmasta
Publisher: University of Tampere
Editors: Juuti, P., Rajala, R.
ISBN (Print): 978-951-857-559-0

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Environmental history of water: Global view of community water supply and sanitation

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P., Katko, T., Vuorinen, H.
Pages: 631-636
Publication date: 2006

Host publication information

Title of host publication: Symposium Preprint Book: 1st IWA International Symposium on Water and Wastewater Technologies in Ancient Civilizations, Iraklio, Greece, 27.10.2006

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 16568

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Environmental history of water : global views on community water supply and sanitation

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Bio- ja ympäristötekniikka, Department of Civil Engineering, Former organisation of the author
Contributors: Juuti, P. S. (ed.), Katko, T. S. (ed.), Vuorinen, H. S. (ed.)
Publication date: 2007

Publication information

Place of publication: London
Publisher: IWA Publishing
ISBN (Print): 978-1-84339-110-4
ISBN (Electronic): 1-84339-110-4
Original language: English

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14492

Research output: Book/ReportAnthologyScientificpeer-review

Environmental impact of micropollutants present in urine

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Chemistry and Bioengineering
Contributors: Pynnönen, S., Tuhkanen, T.
Number of pages: 8
Pages: 1-8
Publication date: 2012

Host publication information

Title of host publication: Dry Toilet Conference 2012, 4th International Dry Toilet Conference, Full Papers, 22-24 August 2012, Tampere, Finland
Place of publication: Helsinki
Publisher: Global Dry Toilet Assciation of Finland

Publication series

Name: International Dry Toilet Conference

Bibliographical note

ei ut-numeroa 28.8.2013<br/>Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: Global Dry Toilet Assciation of Finland

Source: researchoutputwizard
Source ID: 5123

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Epilogue

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Juuti, P. S. (ed.), Katko, T. S. (ed.), Schwartz, K. (ed.)
Number of pages: 5
Publication date: 2013

Publication information

Publisher: IWA Publishing
ISBN (Print): 978-1-78040-022-8
ISBN (Electronic): 978-1-78040-073-0
Original language: English

Bibliographical note

Prologue r=1587<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-09-29

Source: researchoutputwizard
Source ID: 2441

Research output: Book/ReportAnthologyScientificpeer-review

Epilogue: Local Solutions Based on Local Conditions

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P. S., Katko, T. S., Vuorinen, H. S.
Pages: 593-598
Publication date: 2007

Host publication information

Title of host publication: 2007. Environmental History of Water - Global views on community water supply and sanitation. IWA Publishing
Editors: Juuti P.S., K. T., Vuorinen, H.

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14497

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Erosion testing of filled and/or reinforced vinyl ester composites in water medium at elevated temperature

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Materials Science, Research group: Plastics and Elastomer Technology, Outotec Research Center
Contributors: Siljander, S., Kiviniemi, M., Sarlin, E., Lindgren, M., Suihkonen, R., Vuorinen, J.
Number of pages: 10
Publication date: 2015

Host publication information

Title of host publication: Proceedings of the 20th International Conference on Composite Materials

Bibliographical note

ISBN kysytty, ei löydy / TL

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

E-sail test payload of the ESTCube-1 nanosatellite

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Envall, J., Janhunen, P., Toivanen, P., Pajusalu, M., Ilbis, E., Kalde, J., Averin, M., Kuuste, H., Laizans, K., Allik, V., Rauhala, T., Seppänen, H., Kiprich, S., Ukkonen, J., Haeggström, E., Kalvas, T., Tarvainen, O., Kauppinen, J., Nuottajärvi, A., Koivisto, H.
Number of pages: 12
Pages: 210-221
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Proceedings of the Estonian Academy of Sciences
Volume: 63
Issue number: 2S
ISSN (Print): 1736-6046
Ratings: 
  • Scopus rating (2014): CiteScore 1 SJR 0.192 SNIP 0.575
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-05-22<br/>Publisher name: Teaduste Akadeemia Kirjastus; Eesti Teaduste Akadeemia

Source: researchoutputwizard
Source ID: 285

Research output: Contribution to journalArticleScientificpeer-review

Espoo päättää siirtyä kärkipaikalle

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering, University of Tampere
Contributors: Juuti, P., Rajala, R.
Pages: 73-76
Publication date: 2008

Host publication information

Title of host publication: Ei jätevedenpuhdistamoa minun takapihalleni : Jätevedenpuhdistuksen päätöksenteko, päätäntäprosessit ja julkinen keskustelu Espoossa historiassa, nyt ja tuelvaisuudessa
Publisher: TamPub
Editors: Juuti, P., Rajala, R.
ISBN (Print): 978-951-857-540-8
ISBN (Electronic): 978-951-44-7511-5

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Evaluation of methods for enhancing methane oxidation via increased soil air capacity and nutrient content in simulated landfill soil cover

Landfill soil covers and methanotrophs therein have potential to act as final sinks of the greenhouse gas methane (CH4) generated in landfills, but soil characteristics in landfills might not support methanotrophic activity due to poor soil material selection or mineralisation over time. Hence, our aim was to determine the performance of mineral landfill soil under simulated CH4 flux and screen methods for elevating the CH4 elimination capacity (EC) of soil. The methods tested during the column experiment were inorganic fertilisation (nitrate, phosphate, sulphate, copper), decompaction and amelioration of the soil with compost. The addition of compost proved to be the most effective method for increasing the CH4 EC of soil, increasing from 55 to 189 g m-2 d-1 relative to the untreated control soil. This increase could be attributed to increased air capacity, concentration of soil nutrients and number of cultivable methanotrophs. Also, soil water-holding capacity was identified as a more crucial factor for methanotrophic activity than total porosity. Inorganic fertilisation and decompaction induced only a temporary increase in CH4 EC, likely resulting from the temporary supply of fertiliser to the nutrient-deprived soil. In conclusion, we suggest that compost amelioration (22 w-%) could be useful for restoring CH4 EC of old landfill covers as an aftercare action to control environmental impacts of closed landfills.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Bio- and Circular Economy
Contributors: Maanoja, S., Rintala, J.
Number of pages: 11
Pages: 82-92
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: Waste Management
Volume: 82
ISSN (Print): 0956-053X
Ratings: 
  • Scopus rating (2018): CiteScore 8.2 SJR 1.523 SNIP 2.232
Original language: English
Keywords: Greenhouse gas, Methanotroph, Fertilisation, Compost, Water-holding capacity

Research output: Contribution to journalArticleScientificpeer-review

Evolution of Community-Managed Water Supply Projects From 1994 to the 2010s in Ethiopia

This article discusses the evolution of community-managed projects (CMPs) along with the global community-based management of water supply and sanitation services since the 1960s, particularly the evolution of Ethiopian water resources development in the last century. The study was conducted with intensive reviews of journals, reports, project documents, and discussions with the people involved in CMP implementation, including many Ethiopian government officials. The article presents the various development phases of the water and sanitation sector in Ethiopia together with national and global influences. Currently, in the 2010s, the CMP financing mechanisms and the national development of water supply and sanitation are more organized and integrated, and are in the stage of scaling up. The recently agreed national water, sanitation, and hygiene strategic framework is expected to have significant impacts on the rural water supply and sanitation development in Ethiopia.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Life Cycle Effectiveness of the Built Environment (LCE@BE), Department of Chemistry and Bioengineering, Community-Led Accelerated WASH (COWASH) Project
Contributors: Behailu, B. M., Suominen, A., Katko, T. S.
Number of pages: 22
Pages: 379-400
Publication date: 22 Oct 2015
Peer-reviewed: Yes
Early online date: 13 Jul 2015

Publication information

Journal: Public Works Management and Policy
Volume: 20
Issue number: 4
ISSN (Print): 1087-724X
Ratings: 
  • Scopus rating (2015): CiteScore 0.9 SJR 0.242 SNIP 0.41
Original language: English
ASJC Scopus subject areas: Business, Management and Accounting (miscellaneous), Sociology and Political Science, Public Administration
Keywords: community-managed projects (CMP), Ethiopia, evolution, sustainability, water sector reforms
Source: Scopus
Source ID: 84942086997

Research output: Contribution to journalArticleScientificpeer-review

Examples of occupational ELF electric and magnetic field exposure in Finland

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Alanko, T., Pääkkönen, R., Lahtinen, S., Korpinen, L.
Number of pages: 2
Pages: 1-2
Publication date: 2011

Host publication information

Title of host publication: 10th International Conference European Bioelectromagnetics Association, 21-24 February 2011, Rome, Italy
Place of publication: Rome
Publisher: European Bioelectromagnetics Association
ISBN (Print): 978-88-8286-231-2

Publication series

Name: International Conference European Bioelectromagnetics Association
Publisher: European Bioelectromagnetics Association

Bibliographical note

ei ut-numeroa 19.10.2013<br/>Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 5679

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Examples of using the moodle virtual learning environment for teaching technical university students

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Gonzalez-Sosa, J., Tepsa, K.
Pages: 981-990
Publication date: 2012

Host publication information

Title of host publication: EDULEARN12 Proceedings, 4th International Conference on Education and New Learning Technologies, 2-4 July, 2012, Barcelona, Spain
Place of publication: Barcelona
Publisher: International Association of Technology, Education and Development IATED
Editors: Gomez Chova, L., Candel Torres, I., Lopez Martinez, A.
ISBN (Print): 978-84-695-3491-5

Publication series

Name: International Conference on Education and New Learning Technologies

Bibliographical note

ei ut-numeroa 19.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: International Association of Technology, Education and Development IATED

Source: researchoutputwizard
Source ID: 4529

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Examples to Reduce the EMF Generated by HV Power Transmission Lines of Different Design

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Okun, A., Korpinen, L.
Publication date: 2012

Host publication information

Title of host publication: Proceedings - 7th International Workshop on Biological Effects of Electromagnetic Fields, 7th IWSBEEMF, 8 - 12 October 2012, Valletta, Malta
Publisher: Electromagnetic Research Group - EMRG (Malta); Departmet of Physics, University of Malta
ISBN (Print): 978-99957-0-361-5

Publication series

Name: International Workshop on Biological Effects of Electromagnetic Fields

Bibliographical note

ei ut-numeroa 27.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: Electromagnetic Research Group - EMRG (Malta); Departmet of Physics, University of Malta

Source: researchoutputwizard
Source ID: 4979

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Expanding rural water supplies in historical perspective: Six cases from Finland and South Africa

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P., Katko, T., Mäki, H., Toivio, H.
Pages: 355-380
Publication date: 2007

Host publication information

Title of host publication: Environmental History of Water - Global views on community water supply and sanitation
Editors: Juuti, P., Katko, T., Vuorinen, H.

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14489

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Experiences of integrating MSc student research projects in the "electromagnetic fields and health" area

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Pääkkönen, R., Gonzalez-Sosa, J., Gobba, F.
Pages: 1007-1010
Publication date: 2012

Host publication information

Title of host publication: EDULEARN12 Proceedings, 4th International Conference on Education and New Learning Technologies, 2-4 July, 2012, Barcelona, Spain
Place of publication: Barcelona
Publisher: International Association of Technology, Education and Development IATED
Editors: Gomez Chova, L., Candel Torres, I., Lopez Martinez, A.
ISBN (Print): 978-84-695-3491-5

Publication series

Name: International Conference on Education and New Learning Technologies

Bibliographical note

ei ut-numeroa 19.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: International Association of Technology, Education and Development IATED

Source: researchoutputwizard
Source ID: 4536

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Experimental study of oxy-fuel combustion in a drop tube reactor

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Energy and Process Engineering
Contributors: Rodriguez, A. M., Raiko, R.
Number of pages: 11
Pages: 1-11
Publication date: 2010

Host publication information

Title of host publication: AFRC 2010 Pacific Rim Combustion Symposium, September 26-29, 2010 Sheraton Maui, Hawaii

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 9124

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Exposure to electric and magnetic fields at 110 kV substation while performing the task ‘Changing a bulb from a man hoist’ in the Tampere region

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Pääkkönen, R., Holm, A., Korpinen, L.
Number of pages: 2
Pages: 1-2
Publication date: 2010

Host publication information

Title of host publication: Bioelectromagnetics Society 32nd Annual Meeting (BEMS), June 14-18, 2010, Seoul, Korea

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 8922

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Exposure to Extremely Low Frequency Magnetic Fields: a Personal Monitoring Study in a Large Group of Workers

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Gobba, F., Rossi, P., Contessa, G. M., Korpinen, L.
Pages: 63-64
Publication date: 2012

Host publication information

Title of host publication: II National Conference ICEmB 27.-29.6.2012, Bologna, Italy
Place of publication: Genova
Publisher: The Inter-university research Centre into Interactions between Electromagnetic fields and Biosystems ICEmB

Publication series

Name: National Conference ICEmB

Bibliographical note

ei ut-numeroa 13.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: The Inter-university research Centre into Interactions between Electromagnetic fields and Biosystems ICEmB

Source: researchoutputwizard
Source ID: 4094

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Exposure to indoor air pollution across socio-economic groups in high-income countries: A scoping review of the literature and a modelling methodology

Disparities in outdoor air pollution exposure between individuals of differing socio-economic status is a growing area of research, widely explored in the environmental health literature. However, in developed countries, around 80% of time is spent indoors, meaning indoor air pollution may be a better proxy for personal exposure. Building characteristics - such as build quality, volume and ventilation - and occupant behaviour, mean indoor air pollution may also vary across socio-economic groups, leading to health inequalities. Much of the existing literature has focused on inequalities in exposure to outdoor air pollution, and there is thus a lack of an evidence base reviewing data for indoor environments. In this study, a scoping review of the literature on indoor air pollution exposures across different socio-economic groups is performed, examining evidence from both monitoring and modelling studies in the developed world. The literature was reviewed, identifying different indoor pollutants, definitions for socio-economic status and pre- and post- housing interventions. Based on the review, the study proposes a modelling methodology for evaluating the effects of environmental policies on different socio-economic populations. Using a sample size calculation, obstacles in obtaining sufficiently large samples of monitored data are demonstrated. A modelling framework for the rapid quantification of daily home exposure is then outlined as a proof of concept. While significant additional research is required to examine inequalities in indoor exposures, modelling approaches may provide opportunities to quantify exposure disparities due to housing and behaviours across populations of different socio-economic status.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: UCL Energy Institute, UCL Institute for Environmental Design & Engineering, University College London, London, UK., PHE, University College London, Public Health England, University College of London
Contributors: Ferguson, L., Taylor, J., Davies, M., Shrubsole, C., Symonds, P., Dimitroulopoulou, C.
Publication date: Oct 2020
Peer-reviewed: Yes

Publication information

Journal: Environment International
Volume: 143
Article number: 105748
ISSN (Print): 0160-4120
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Factors affecting the elimination capacity of a passive methane biofilter

Passive biofilters are used for controlling CH4 emissions from different sources with the help of methanotrophic bacteria. The CH4 elimination capacity of a biofilter can be affected by different factors, such as the structure and composition of the filter material and formation of bacterial exopolymeric saccharides (EPS). Recognising these factors and resolving their effect on the elimination capacity is important for efficient greenhouse gas emission control. Hence, we studied the evolution of the elimination capacity of a passive CH4 biofilter containing soil as low-cost filter material. We aimed at identifying the factors affecting the elimination capacity and tested the effectiveness of a mechanical regeneration method for improving the operation efficiency. A laboratory-scale biofilter containing landfill soil was operated for 148 days. The CH4 removal efficiency reached 70 % in the beginning of the operation (0–7 days), but stabilised at 25 % after 50 days. The filter bed was mixed and loosened twice during the operation. As a result, the glucose content of the soil representing the clogging agent secreted by bacteria (EPS) remained stable throughout the experiment (23 mg gdw-1) and O2 penetrated deeper in the filter bed indicating improved gas diffusion. However, the CH4 removal efficiency did not increase from 25–30 %. The reason for this remained unknown, but the results indicated that soil as filter material was able to maintain its elimination capacity despite the formation of EPS. Mixing was shown to be an effective and necessary method for improving the gas diffusion properties of the filter bed.

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Maanoja, S., Rintala, J.
Number of pages: 6
Pages: 83-88
Publication date: 2015

Host publication information

Title of host publication: BioTechniques Ghent 2015 The 6th international conference on biotechniques for air pollution control : Conference Proceedings
Keywords: Methane, Biofiltration, Passive operation, Landfill soil

Bibliographical note

ISBN kysytty, HO.
Ei ole, HO.

Research output: Chapter in Book/Report/Conference proceedingConference contributionProfessional

Fast pyrolysis of coal, peat, and torrefied wood: Mass loss study with a drop-tube reactor, particle geometry analysis, and kinetics modeling

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Tolvanen, H., Kokko, L., Raiko, R.
Pages: 148-156
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: Fuel
Volume: 111
Issue number: September
ISSN (Print): 0016-2361
Ratings: 
  • Scopus rating (2013): CiteScore 5.7 SJR 1.762 SNIP 2.531
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-06-29<br/>Publisher name: Elsevier Ltd.

Source: researchoutputwizard
Source ID: 3549

Research output: Contribution to journalArticleScientificpeer-review

Fate of dissolved organic matter in softwood element-chlorine-free bleached kraft mill fiberline

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Chemistry and Bioengineering
Contributors: Luonsi, A.
Publication date: 2010

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-2344-1
Original language: English

Publication series

Name: Tampereen teknillinen yliopisto. Julkaisu
Publisher: Tampere University of Technology
Volume: 878
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology

Source: researchoutputwizard
Source ID: 8687

Research output: Book/ReportDoctoral thesisCollection of Articles

Fate of trace elements during and after anaerobic digestion: a sequential extraction method and DGT technique to assess bio-accessible trace elements in digestate

Different chemical interactions between trace elements and organic/inorganic compounds originating from the substrate and generated during the anaerobic digestion process will determine the speciation of trace elements in anaerobic digesters. After anaerobic digestion, digestates are exposed to oxidizing conditions which may favor a change of trace elements’ speciation and consequently bio-accessibility for soil microorganisms and plants when digestates are spread on lands as organic amendment. Several techniques were used to assess the mobility, accessibility, and potential bio-availability of
trace elements in digestates for environmental risk assessments of digestate utilization as a soil fertilizer. The aim of this thesis is to evaluate a sequential extraction procedure and the diffusive gradients in thin films technique (DGT) to assess bio-accessible trace elements in digestate samples. Samples were taken from full-scale anaerobic digestion plants treating a mixture of industrial and municipal solid wastes or sewage sludge. The elements investigated include Al, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sb, Se, Zn and W.

A sequential extraction procedure, originally conceived for organic matter fractionation, was implemented to simultaneously extract organic matter and trace elements in a substrate and digestate sample. It was observed that more than 60% of total As, Cd, Co, Fe, Mn, Ni and Zn were extracted along with the operationally defined organic matter fractions in both samples. In contrast, a lower recovery was observed for Al, Cr, Cu, Mo and Pb. These elements were mainly found in the dissolved organic matter fraction where soluble trace elements (e.g. free ions and complexed with organic/inorganic ligands) are
likely bio-accessible for microbial up-take. Moreover, a high portion of elements was found in the mineral fraction (e.g. sulfide), which was considered poorly bio-accessible. However, the feasibility of using the aforementioned method was questioned following the low efficiency of extraction of certain trace elements during the extraction procedure. Moreover, it was acknowledged that chemical reagents employed during the extraction procedure could have promoted a dissolution/precipitation of trace elements and therefore a change in their fractionation.

Therefore, DGT technique was tested to fractionate trace elements and it was observed that this technique increased the sensitivity of trace elements monitoring compared to conventional dissolved elements measurements in digested sewage sludge. However, it was observed that the DGT samplers’ deployment time in digested sewage sludge should be carefully evaluated. Additionally, the digestate matrix lowered the accumulation of some trace elements in the DGT samplers. Therefore, DGT labile trace elements (i.e. most bio-accessible species) can be correctly estimated provided a careful adapta-
tion of the deployment time as well as an evaluation of the matrix effect is performed in digestate samples. Unless this, general trend of labile trace elements over time could be estimated such as the distribution of labile trace elements over time in digestate exposed to air. Therefore, the effect of atmospheric air on the mobility and bio-accessibility of trace elements, including labile and soluble fractions, in digested sewage sludge was investigated. The exposure of digestate to air promoted dissolution of Al, As, Co, Cr, Cu, Fe, Mn, Mo and Pb, suggesting that a possible increase in their mobility may likely occur
during digestate storage in open tanks or handling before land spreading. Labile elements’ fraction increased only during an increase of aeration (except for Fe and Mn), suggesting that their short-term bio-accessibility can increase only after significant aeration as the one assumed to occur when digestate land spreading takes place.

These results open new fields of investigation for improving estimation of bio-accessible trace elements in digestate samples. For example, DGT technique should be further explored to accurately estimate labile trace elements concentrations in digestates.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Materials Science and Environmental Engineering
Contributors: Laera, A.
Publication date: 22 May 2019

Publication information

Publisher: Tampere University
Original language: English

Publication series

Name: Tampere University Dissertations
URLs: 

Research output: Book/ReportDoctoral thesisCollection of Articles

Feasibility of Flexible Biomass Utilization in Energy Systems

Globally the fastest growing renewable energy production methods are weather
dependent solar and wind power production. However, their locality and fluctuating nature may make the energy demand and production unbalanced and thus increases the need for system flexibility.
Biomass is available in one form or another almost everywhere on Earth. It has
been recognized to have potential for providing flexibility into energy systems. Even though technological possibilities for biomass utilization are numerous, detailed costs of the flexibility means are often ignored. This thesis looks in detail into the feasibility of flexible biomass utilization methods through practical examples; biomass to chemicals, biomass to heat and power and biomass as a transport fuel.
The results of this study provides suggestions how to increase the feasibility of
biomass utilization in energy system levels. The results showed that biomass can
provide flexibility through demand response, flexible production, and useful power storage. These can be achieved with currently existing technologies that can be adopted in a short timescale through introducing subsidies.. It was also shown that the feasibility of biomass utilization method can be improved through side-product, optimized running mode, or technical improvements. The most efficient way to increase the feasibility was operational optimization. The key factors in the feasibility of biomass utilization methods are investment and fuel costs. However, as sustainable amount of biomass is limited other flexibility means will be needed.
Future studies should include accurate forecasting on cost and price
development, since these are often based on assumptions. In addition, sustainability and carbon emissions of the whole biomass production chain should be studied.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Research group: Bio- and Circular Economy, Materials Science and Environmental Engineering
Contributors: Pääkkönen, A.
Number of pages: 80
Publication date: 13 Dec 2019

Publication information

Publisher: Tampere University
ISBN (Print): 978-952-03-1334-0
ISBN (Electronic): 978-952-03-1335-7
Original language: English

Publication series

Name: Tampere University Dissertations
Volume: 166
ISSN (Print): 2489-9860
ISSN (Electronic): 2490-0028

Research output: Book/ReportDoctoral thesisCollection of Articles

Fermentative metabolism of an anaerobic, thermophilic consortium on plant polymers and commercial paper samples

The purpose of the study was to examine the feasibility and capacity of a thermophilic microbial consortium to produce fermentative metabolites from plant polymers. The consortium comprised of cellulolytic anaerobes that were originally enriched from a compost pile using cellulose as the substrate. Fermentative metabolism was examined with monosaccharides, disaccharides, hemicellulose, starch, pectin, chitin, and eight commercial paper samples without further enrichment of the culture to each specific substrate. In general, H2, CH4, CO2, and organic acids were the main metabolites on all substrates but the metabolite profiles varied with the substrate. Similar H2 yields of 2-3molmol-1 substrate at 48h were obtained with all monosaccharides and disaccharides. The CO2 yields were higher with disaccharides than with monosaccharides, 4.5 vs 2molmol-1 substrate. Metabolite yields were relatively low with glyceraldehyde, glycerol, and arabinose. Paper samples containing high amounts of chemical pulp produced the highest metabolite yields, and biodegradation accounted for ≤74% of total dry weight loss. The fermentative metabolism of the paper samples varied with the pulp composition and the amount of inorganic material. Bacterial community analysis using pyrosequencing analysis of 16S rRNA gene showed a predominance of members of the order Clostridiales, including members of genera Clostridium and Lutispora, which contain known cellulolytic organisms. Most differences among the samples were attributed to small taxonomic groups represented by ≤10% of total sequences.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Department of Animal Science, Ohio State University
Contributors: Carver, S. M., Nelson, M. C., Yu, Z., Tuovinen, O. H.
Number of pages: 12
Pages: 11-22
Publication date: 1 Apr 2015
Peer-reviewed: Yes

Publication information

Journal: Biomass & Bioenergy
Volume: 75
ISSN (Print): 0961-9534
Ratings: 
  • Scopus rating (2015): CiteScore 6.8 SJR 1.51 SNIP 1.587
Original language: English
ASJC Scopus subject areas: Agronomy and Crop Science, Forestry, Renewable Energy, Sustainability and the Environment, Waste Management and Disposal
Keywords: Anaerobic biodegradation, Biohydrogen, Cellulose biodegradation, Fermentation, Plant polymers
Source: Scopus
Source ID: 84923621284

Research output: Contribution to journalArticleScientificpeer-review

Fe2O3-TiO2 Nano-heterostructure Photoanodes for Highly Efficient Solar Water Oxidation

Harnessing solar energy for the production of clean hydrogen by photo-electrochemical water splitting represents a very attractive, but challenging approach for sustainable energy generation. In this regard, the fabrication of Fe2O3-TiO2 photoanodes is reported, showing attractive performances [≈2.0 mA cm-2 at 1.23 V vs. the reversible hydrogen electrode in 1 M NaOH] under simulated one-sun illumination. This goal, corresponding to a tenfold photoactivity enhancement with respect to bare Fe2O3, is achieved by atomic layer deposition of TiO2 over hematite (α-Fe2O3) nanostructures fabricated by plasma enhanced-chemical vapor deposition and final annealing at 650 °C. The adopted approach enables an intimate Fe2O3-TiO2 coupling, resulting in an electronic interplay at the Fe2O3/TiO2 interface. The reasons for the photocurrent enhancement determined by TiO2 overlayers with increasing thickness are unraveled by a detailed chemico-physical investigation, as well as by the study of photo-generated charge carrier dynamics. Transient absorption spectroscopy shows that the increased photoelectrochemical response of heterostructured photoanodes compared to bare hematite is due to an enhanced separation of photogenerated charge carriers and more favorable hole dynamics for water oxidation. The stable responses obtained even in simulated seawater provides a feasible route in view of the eventual large-scale generation of renewable energy.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Tampere University of Technology, Research group: Supramolecular photochemistry, Universita degli Studi di Padova, Italy, Universiteit Antwerpen, Universitat zu Koln, Universita degli Studi di Brescia
Contributors: Barreca, D., Carraro, G., Gasparotto, A., Maccato, C., Warwick, M. E. A., Kaunisto, K., Sada, C., Turner, S., Gönüllü, Y., Ruoko, T., Borgese, L., Bontempi, E., Van Tendeloo, G., Lemmetyinen, H., Mathur, S.
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Advanced Materials Interfaces
Volume: 2
Issue number: 17
ISSN (Print): 2196-7350
Ratings: 
  • Scopus rating (2015): CiteScore 2.2 SJR 1.193 SNIP 0.738
Original language: English
ASJC Scopus subject areas: Mechanical Engineering, Mechanics of Materials
Keywords: FeO, Nano-heterostructures, Photoelectrochemistry, TiO, Water splitting
Electronic versions: 
Source: Scopus
Source ID: 84955180397

Research output: Contribution to journalArticleScientificpeer-review

Finland's Water Services: Looking to its Past to Figure Out its Future.

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Civil Engineering
Contributors: Katko, T. S.
Publication date: Mar 2018
Peer-reviewed: No

Publication information

Journal: Water and Wastewater International
ISSN (Print): 0891-5385
Ratings: 
  • Scopus rating (2018): SJR 0.106
Original language: English

Research output: Contribution to journalArticleScientific

Finnish engineering education for the benefit of people and environment

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Chemistry and Bioengineering
Contributors: Takala, A., Korhonen-Yrjänheikki, K.
Number of pages: 10
Pages: 1-10
Publication date: 2010

Host publication information

Title of host publication: International Conference Engineering Education in Sustainable Development, EESD´10, 19-22 September 2010, Gothenburg, Sweden

Bibliographical note

Konferenssiartikkeli CD:llä<br/>Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 9361

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Finnish water services: Experiences in global perspective

General information

Publication status: Published
MoE publication type: C1 Separate scientific books
Organisations: Department of Civil Engineering
Contributors: Katko, T. S.
Number of pages: 288
Publication date: 4 Nov 2016

Publication information

Place of publication: Helsinki
Publisher: Finnish Water Utilities Association
ISBN (Print): 978-952-6697-26-0
Original language: English
Keywords: Water services, History, Development, Leadership, Institutions, Governance
URLs: 

Research output: Book/ReportBookScientificpeer-review

Finnish water services: Experiences in global perspective

General information

Publication status: Published
MoE publication type: C1 Separate scientific books
Organisations: Civil Engineering
Contributors: Katko, T. S.
Number of pages: 288
Publication date: 7 Jul 2017

Publication information

Place of publication: London
Publisher: IWA Publishing
ISBN (Electronic): 9781780408743
Original language: English
Keywords: Water services, History, Development, Leadership, Institutions, Governance

Bibliographical note

https://www.iwapublishing.com/books/finnish-water-services-experiences-global-perspective

Research output: Book/ReportBookScientificpeer-review

Fire, Thirst, Health and Hygiene: Root Causes for the Introduction of Water Supply and Sanitation in Kajaani

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering, University of Tampere
Contributors: Juuti, P., Rajala, R., Katko, T. S.
Pages: 275-286
Publication date: 2009

Host publication information

Title of host publication: Elämän virta : Kajaanin veden historia
Publisher: TamPub
Editors: Juuti, P., Rajala, R., Katko, T.
ISBN (Print): 978-951-800-320-8
ISBN (Electronic): 978-951-44-7657-0

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Flotaatiokennon injektorin diffuusori

General information

Publication status: Published
MoE publication type: H1 Granted patent
Organisations: Department of Energy and Process Engineering
Contributors: Nieminen, E., Virtanen, J.
Publication date: 2008

Publication information

Patent number: WO 2007/042619 A1
Priority date: 31/12/08
Priority number: FI 119554 B
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 13125

Research output: PatentScientific

Fluidized bed bioreactor for multiple environmental engineering solutions

Fluidized bed bioreactors (FBR) are characterized by two-phase mixture of fluid and solid, in which the bed of solid particles is fluidized by means of downward or upward recirculation stream. FBRs are widely used for multiple environmental engineering solutions, such as wastewater treatment, as well as some industrial applications. FBR offers many benefits such as compact bioreactor size due to short hydraulic retention time, long biomass retention on the carrier, high conversion rates due to fully mixed conditions and consequently high mass transfer rates, no channelling of flow, dilution of influent concentrations due to recycle flow, suitability for enrichment of microbes with low Km values. The disadvantages of FBRs include bioreactor size limitations due to the height-to-diameter ratio, high-energy requirements due to high recycle ratios, and long start-up period for biofilm formation. This paper critically reviews some of the key studies on biomass enrichment via immobilisation of low growth yield microorganisms, high-rates via fully mixed conditions, technical developments in FBRs and ways of overcoming toxic effects via solution recycling. This technology has many potential new uses as well as hydrodynamic characteristics, which enable high-rate environmental engineering and industrial applications.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy, Yildiz Technical University, Istanbul Medeniyet University, CSIRO Land and Water
Contributors: Özkaya, B., Kaksonen, A. H., Sahinkaya, E., Puhakka, J. A.
Pages: 452 - 465
Publication date: 1 Mar 2019
Peer-reviewed: Yes

Publication information

Journal: Water Research
Volume: 150
ISSN (Print): 0043-1354
Ratings: 
  • Scopus rating (2019): CiteScore 14.5 SJR 2.932 SNIP 2.542
Original language: English
Keywords: Biofilm, Fluidized bed bioreactor, High rate, Water treatment, Wastewater treatment

Bibliographical note

EXT="Kaksonen, Anna H."
EXT="Sahinkaya, Erkan"

Source: Bibtex
Source ID: OZKAYA2019452

Research output: Contribution to journalArticleScientificpeer-review

Fluidized-bed denitrification of mining water tolerates high nickel concentrations

This study revealed that fluidized-bed denitrifying cultures tolerated soluble Ni concentrations up to 500mg/L at 7-8 and 22°C. From 10 to 40mg/L of feed Ni, denitrification resulted in complete nitrate and nitrite removal. The concomitant reduction of 30mg/L of sulfate produced 10mg/L of sulfide that precipitated nickel, resulting in soluble effluent Ni below 22mg/L. At this stage, Dechloromonas species were the dominant denitrifying bacteria. From 60 to 500mg/L of feed Ni, nickel remained in solution due to the inhibition of sulfate reduction. At soluble 60mg/L of Ni, denitrification was partially inhibited prior to recover after 34days of enrichment by other Ni-tolerant species (including Delftia, Zoogloea and Azospira) that supported Dechloromonas. Subsequently, the FBR cultures completely removed nitrate even at 500mg/L of Ni. Visual Minteq speciation model predicted the formation of NiS, NiCO3 and Ni3(PO4)2, whilst only Ni3(PO4)2 was detected by XRD.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Urban circular bioeconomy (UrCirBio), Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM
Contributors: Zou, G., Papirio, S., van Hullebusch, E. D., Puhakka, J. A.
Number of pages: 7
Pages: 284-290
Publication date: 1 Mar 2015
Peer-reviewed: Yes

Publication information

Journal: Bioresource Technology
Volume: 179
ISSN (Print): 0960-8524
Ratings: 
  • Scopus rating (2015): CiteScore 9.2 SJR 2.243 SNIP 1.899
Original language: English
ASJC Scopus subject areas: Bioengineering, Environmental Engineering, Waste Management and Disposal
Keywords: Denitrification, Denitrifying communities, Fluidized-bed reactor, Nickel, X-ray diffraction
Source: Scopus
Source ID: 84919934975

Research output: Contribution to journalArticleScientificpeer-review

Focus and Change of Water Management in Finland – Analysis of Vesitalous Journal, 1960-2009

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Chemistry and Bioengineering, Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Jaatinen, T. T. O., Katko, T. S., Pynnönen, S. T., Vihanta, J. S.
Pages: 10-32
Publication date: 14 Sep 2012
Peer-reviewed: Unknown

Publication information

Journal: Ympäristöhistoria: Finnish Journal of Environmental History
Issue number: 3
ISSN (Print): 1799-6953
Original language: English

Research output: Contribution to journalArticleProfessional

Foreword Towards More Resilient Water Services

General information

Publication status: Published
MoE publication type: B2 Part of a book or another research book
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Katko, T. S.
Number of pages: 5
Pages: 9-13
Publication date: Sep 2019

Host publication information

Title of host publication: Resilient water services and systems: the foundation of well-being
Publisher: IWA Publishing
Editors: Juuti, P., Mattila, H., Rajala, R., Schwartz, K., Staddon, C.
ISBN (Print): 9781780409764
ISBN (Electronic): 9781780409771

Research output: Chapter in Book/Report/Conference proceedingChapterScientific

Forgotten infrastructure - In the quest for development, sustainability and security

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Chemistry and Bioengineering
Contributors: Hukka, J., Katko, T. S., Pietilä, P. E., Seppälä, O., Vinnari, E. M.
Pages: 318-325
Publication date: 2010

Host publication information

Title of host publication: Proceedings of the Conference on Security in Futures - Security in Change, 3-4 June 2010, Turku, Finland. FFRC eBook
Editors: Auffermann, B., Kaskinen, J.

Bibliographical note

poistettu tupla r=3725<br/>Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8108

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

FSES 2013, Finnish Conference of Environmental Sciences, 2-3 May 2013, Tampere, Finland. Proceedings

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Department of Chemistry and Bioengineering
Contributors: Pynnönen, S. (ed.), Tuhkanen, T. (ed.)
Number of pages: 156
Publication date: 2013

Publication information

Place of publication: Tampere
Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3049-4
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-07-29

Source: researchoutputwizard
Source ID: 3202

Research output: Book/ReportAnthologyScientificpeer-review

Full scale landfill bottom liner test structures at Ämmässuo landfill, Espoo, Finland

Full scale test structures were constructed in sumemr 1996 to the Ämmässuo landfill to gather experience on quality control during the constructionand long term behviour of mineral liner and combination liners. Actual leachate was used to create the chemical loading and a hydraulic pressure of one meter. The leachate was implemented in October 1996, and the structures were monitored for two years. The structures were continously monitored by temperature and soil moisture sensors installed into the liner. The leachate seeping through the line structure was colledted to the lysimeter basins and further to the lusimeter wells, in which the amount of the water was measured automatically by pressure sensors. In addition, frost penetration and infiltrometer measurements were performed and samples were taken for laboratory tests during the two-year period. The structures were pulled down under control in November 1998.

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: SCC Viatek Ltd.
Contributors: Leppänen, M., Kaartokallio, A., Loukola, E.
Number of pages: 8
Pages: 173-180
Publication date: Oct 1999

Host publication information

Title of host publication: Sardinia 99, Seventh International Waste Management and Landfill Symposium, 4-8 October, S. Margherita di Pula, Cagliari, Sardinia, Italy. Proceedings, Vol. I-V.
Volume: III
Editors: Christensen, T. H., Cossu, R., Stegmann, R.
Keywords: Landfill

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Fungal treatment of landfill mining fine fraction to increase its stability and end-use potential

Landfill mining, i.e. extraction, processing, treatment and recovery of landfilled materials, is conducted to prevent pollution and to recover materials and energy from waste (Krook et al., 2012). On average, half of landfilled waste is material resembling soil, i.e. its fine fraction (FF, < 20 mm) (Kaartinen et al., 2013). The end-use potential of the FF is limited due to its organic matter content, a possible presence of harmful contaminants as well as its stability. The aim of this study was to evaluate if fungal treatment stabilises FF and removes organic contaminants thus allowing an end-use of FF as soil-like material. Basidiomycetous fungi were obtained and maintained according to Valentin et al. (2008) prior to experiments and were screened for their potential to grow in FF originally landfilled between 1967 – 1989. Screening experiments and previous experiences with contaminated soil (Valentin et al. 2008) led to the selection of Phanerochaete velutina for fungal treatment experiments, which were carried out at room temperature for 58 days. Two acryl columns (height 600 mm, radius 75 mm) were filled with 1 – 2 cm layer of gravel at the bottom and 5.8 kg of FF on the top as well as 500 mL of tap water. The fungal column was amended with fungal bark inoculum to the middle of the column. Two ports at the bottom of the columns were used to collect leachate and aerate columns with humidified air at 0.1 L/min, respectively. Carbon dioxide (CO2) production was followed during the experiment with gas chromatography. The columns were covered with aluminium foil to stop germination of seeds present in FF. Total solids and volatile solids (VS) were analysed from FF according to standard SFS 3008. Organic contaminants mentioned in criteria for landfilling were analysed from FF in an accredited laboratory. Aerobic stability of FF was determined by the Oxitop method and anaerobic stability of FF was determined as biochemical methane potential. In less than one month, fungal mycelium was observed throughout the FF in the column inoculated with Phanerochaete velutina while no mycelium was observed in the control column. At this stage the experiment was continued in order to allow fungal mycelium to degrade and produce CO2. Concentrations of mineral oils (C10-C40) and organic matter, measured as VS, were higher in FF than in waste that can be placed to landfills. Mineral oil concentrations exceeded Finnish criteria set for contaminated soil. The aerobic stability of FF was high even initially and it did not increase in control or fungal treatments. Fungal treatment reduced organic matter content of FF and reduced mineral oil concentrations, although the criteria set in legislation could not be met in these experiments.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Research group: Industrial Bioengineering and Applied Organic Chemistry, Department of Chemistry and Bioengineering, University of Helsinki, Department of Food and Environmental Sciences
Contributors: Palmroth, M. R. T., Mönkäre, T. J., Steffen, K. T.
Pages: 47
Publication date: 2015

Host publication information

Title of host publication: Book of abstracts of the 6th European Bioremediation Conference
Editors: Kalogerakis, N., Fava, F., Manousaki, E.
Article number: 169
ISBN (Print): 978-960-8475-23-6
ASJC Scopus subject areas: Bioengineering, Geotechnical Engineering and Engineering Geology, Environmental Engineering
Keywords: bioremediation

Bibliographical note

xabstract

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Gender comparison - The university students' exam results in the environmental and energy area

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Pitkänen, A., Raiko, R., Korpinen, L.
Pages: 3299-3308
Publication date: 2012

Host publication information

Title of host publication: INTED 2012 Proceedings, 6th International Technology, Education and Development Conference, March 5th-7th, 2012, Valencia, Spain
Place of publication: Spain
Publisher: International Association of Technology, Education and Development IATED
Editors: Gomez Chova, L., Lopez Martinez, A., Candel Torres, I.
ISBN (Print): 978-84-615-5563-5

Publication series

Name: International Technology, Education and Development Conference

Bibliographical note

INTED2012 abstracts cd isbn 978-84-615-5562-8; INTED2012 proceedings cd isbn: 978-84-615-5563-5.Ei UT-numeroa 28.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: International Association of Technology, Education and Development IATED

Source: researchoutputwizard
Source ID: 5074

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Genesis of Water supply and sanitation services in Finland

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Rajala, R. P., Juuti, P. S., Katko, T. S.
Number of pages: 11
Pages: 18-28
Publication date: Apr 2019
Peer-reviewed: Yes

Publication information

Journal: Ympäristöhistoria: Finnish Journal of Environmental History
Volume: 8
Issue number: 1
ISSN (Print): 1799-6953
Original language: Finnish

Research output: Contribution to journalArticleScientificpeer-review

Geometry of plate fins for maximizing heat transfer

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Mechanics and Design, Department of Energy and Process Engineering
Contributors: Karvinen, R., Karvinen, T.
Number of pages: 10
Pages: 1-10
Publication date: 2010

Host publication information

Title of host publication: 14th International Heat Transfer Conference IHTC-14, August 8-13, 2010, Washington DC, USA
Publisher: ASME

Bibliographical note

50 % Mec, 50 % Epr, poistettu tupla r=3301<br/>Contribution: organisation=epr,FACT1=0.5<br/>Contribution: organisation=mec,FACT2=0.5

Source: researchoutputwizard
Source ID: 8302

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Geo + Ympäristö = Ympäristögeotekniikka?

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Civil Engineering, Research group: Earth Constructions
Contributors: Leppänen, M.
Number of pages: 2
Pages: 6-7
Publication date: Mar 2013
Peer-reviewed: Unknown

Publication information

Journal: Geofoor
Issue number: 39
Original language: Finnish

Research output: Contribution to journalArticleProfessional

Gestao e organizacao dos servicos de saneamento : Abordagens europeias.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Seppälä, O., Katko, T. S.
Pages: 135-155
Publication date: 2013

Host publication information

Title of host publication: Politica publica e gestao de servicos de saneamento
Place of publication: Belo Horizonte; Rio de Janeiro
Publisher: Editora da Universidade Federal de Minas Gerais (UFMG); Editora Fiocruz
Editors: Heller, L., Esteban Castro, J.
ISBN (Print): 978-85-7041-953-8

Bibliographical note

Pol&iacute;tica Pública e Gestão de Servi&ccedil;os de Saneamento (Public Policy and Management of Water and Sanitation Services)<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-11-29

Source: researchoutputwizard
Source ID: 3400

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Glazed spaces: A simplified calculation method for the evaluation of energy savings and interior temperatures

Previous studies have shown that temperatures inside glazed balconies are almost without exception higher than those of outside air. This is due to the space's ability to capture and store the building's heat losses and solar radiation. The interior temperatures and energy saving effects of glazed balconies are, however, not particularly good in Finland, because the implemented solutions are not optimized for these issues. The purpose of this study is to introduce simplified evaluation methods for the energy saving and interior air temperature evaluation of glazed spaces and to verify the method reliably with the help of measured and simulated values of typical Finnish 1970s apartment blocks. The presented method can be used for optimizing and showing the energy saving impact as well as the mean, maximum and minimum temperatures of different type of glazed spaces in the preliminary design stage. The results show that the accuracy of the method is sufficient for designing if nine parameters are changed at most. The accuracy is affected by the number of changes made in relation to the typical 1970s apartment blocks in Finland, which was chosen as a starting point for the method's development.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, School of Architecture, Research group: Built Environment in Transition, Research group: Built Environment in Transition, A-Insinöörit Suunnittelu Oy
Contributors: Hilliaho, K., Kovalainen, V., Huuhka, S., Lahdensivu, J.
Number of pages: 18
Pages: 27-44
Publication date: 1 Aug 2016
Peer-reviewed: Yes
Early online date: 30 Apr 2016

Publication information

Journal: Energy and Buildings
Volume: 125
ISSN (Print): 0378-7788
Ratings: 
  • Scopus rating (2016): CiteScore 6.6 SJR 2.055 SNIP 1.969
Original language: English
Keywords: Glazed space, Balcony glazing, Interior temperature, Energy saving effect, Simplified calculation, Ida-ice, THERMAL SIMULATION, ATTACHED SUNSPACES, VALIDATION, MODEL
Source: WOS
Source ID: 000378962300004

Research output: Contribution to journalArticleScientificpeer-review

Global challenges and role of institutions in water services

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Civil Engineering
Contributors: Katko, T. S.
Number of pages: 1
Pages: 15
Publication date: 9 May 2017
Peer-reviewed: Unknown

Publication information

Journal: Econetin asakaslehti AQ
Issue number: 1
ISSN (Print): 1799-7763
Original language: English

Research output: Contribution to journalArticleProfessional

Governance in water sector - comparing development in Kenya, Nepal, South Africa and Finland

General information

Publication status: Published
MoE publication type: C2 Edited books
Organisations: Bio- ja ympäristötekniikka, Department of Civil Engineering, Former organisation of the author
Contributors: Juuti, P. (ed.), Katko, T. (ed.), Mäki, H. (ed.), Nyanchaga, E. (ed.), Rautanen, S. (ed.), Vuorinen, H. (ed.)
Publication date: 2007

Publication information

Publisher: Unknown Publisher
ISBN (Print): 978-951-44-6950-3
Original language: English

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14488

Research output: Book/ReportAnthologyScientificpeer-review

Groundwater as a source of conflict and cooperation: Towards creating mutual gains in a finnish water supply project

Community planners, decision-makers and authorities frequently encounter conflicts revolving around natural resource management as well as around urban planning. Since the 1970s, the dynamics of conflict resolution have evolved from conventional expert-based rational solutions towards collaborative ones. Against this background, our research investigates one contentious groundwater project in the Tampere Region in Finland. Conflict assessment clarified the divergent interests of the multiple parties. Drawing on negotiation theory, this study illustrates how polarised positions and competitive framing, as well as the influence of historical baggage, may form an insurmountable barrier to successful negotiation. While the acknowledgement of various interests should form the heart of the integrative negotiation process, excessive energy is used for argumentation to protect predefined goals with as minor concessions as possible. Addressing the collaborative approach, we suggest multiple ways towards creating mutual gains and cooperation in future water supply projects.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Life Cycle Effectiveness of the Built Environment (LCE@BE)
Contributors: Kurki, V., Katko, T. S.
Number of pages: 15
Pages: 337-351
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Water Alternatives
Volume: 8
Issue number: 3
ISSN (Print): 1965-0175
Ratings: 
  • Scopus rating (2015): CiteScore 4.5 SJR 0.899 SNIP 1.402
Original language: English
ASJC Scopus subject areas: Management, Monitoring, Policy and Law, Geography, Planning and Development, Political Science and International Relations
Keywords: Case-study, Conflict assessment, Finland, Groundwater, Integrative negotiation, Mutual gains approach
Source: Scopus
Source ID: 84948137804

Research output: Contribution to journalArticleScientificpeer-review

Halogen-Bond-Assisted Photoluminescence Modulation in Carbazole-Based Emitter

Halogen bonding between a carbazole-based, pyridine-substituted organic semiconductor and a common halogen-bond donor (pentafluoroiodobenzene) yields efficient halogen-bond-driven fluorescence modulation in solution. Steady-state, time-resolved emission and absorption spectroscopy as well as density functional theory studies demonstrate that the fluorescence modulation arises from halogen-bond-induced intramolecular charge transfer. Fluorescence modulation offers a range of possibilities both in solution and in the solid state, for instance providing a potential pathway for the design of tunable luminescent materials for light-emitting devices.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Chemistry & Advanced Materials
Contributors: Salunke, J., Durandin, N., Ruoko, T., Rafael Candeias, N., Vivo, P., Vuorimaa-Laukkanen, E., Laaksonen, T., Priimägi, A.
Publication date: 26 Sep 2018
Peer-reviewed: Yes

Publication information

Journal: Scientific Reports
Volume: 8
Article number: 14431
ISSN (Print): 2045-2322
Ratings: 
  • Scopus rating (2018): CiteScore 6.4 SJR 1.414 SNIP 1.274
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Halpaa eli hyvää - minkälaisia merkityksiä vesihuoltoala rakentaa itsestään

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O., Takala, A.
Pages: 226-245
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: Kunnallistieteellinen Aikakauskirja
Volume: 41
Issue number: 3
ISSN (Print): 0356-3669
Original language: Finnish

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-12-12<br/>Publisher name: Kunnallistieteen yhdistys

Source: researchoutputwizard
Source ID: 2275

Research output: Contribution to journalArticleScientificpeer-review

Hanaa! Suomen vesihuolto - kehitys ja yhteiskunnallinen merkitys

General information

Publication status: Published
MoE publication type: C1 Separate scientific books
Organisations: Department of Chemistry and Bioengineering
Contributors: Katko, T. S.
Number of pages: 501
Publication date: 2013

Publication information

Place of publication: Helsinki
Publisher: Suomen Vesilaitosyhdistys ry
ISBN (Print): 978-952-5000-97-9
Original language: Finnish

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-06-29

Source: researchoutputwizard
Source ID: 2520

Research output: Book/ReportBookScientificpeer-review

Hätä ei häviä käymälöitä poistamalla

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P., Katko, T.
Pages: 7 s
Publication date: 2005
Peer-reviewed: Unknown

Publication information

Journal: www.huussi.net
Original language: English

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 18525

Research output: Contribution to journalArticleProfessional

Heap Bioleaching of Low-grade Multimetal Sulphidic Ore in Boreal Conditions

The bioleaching of metal sulphide ore has developed into an important industrial process to recover valuable base metals from low-grade ores, because high grade ore resources are depleting. The Talvivaara deposits in Finland have been known for decades, but have not been utilized until now, because of the low nickel concentration. The aim of this work was to study the bioleaching process of a Finnish complex multimetal black schist ore in boreal conditions. The effects of pH and leaching temperature on the dissolution of valuable metals and gangue minerals were studied. The effect of low temperature on iron oxidation and mineral bioleaching was investigated. Microbial community development at different pH values and temperatures was tested in laboratory-scale bioleaching columns and finally the community dynamics were studied in a demonstration-scale bioheap over a period of three years in Talvivaara Finland.

The experiments were carried out using laboratory-scale columns containing about 9 kg of agglomerated ore. The columns were loaded with the ore, irrigated with pregnant leaching solution (PLS) by recycling and aerated from the bottom. The tested pH range was from 1.5 to 3.0 at 21 ºC and temperature range was from 7 to 50 ºC at pH 2.5. The particle size (d80) of the ore was 7.6 mm. Surface water taken from lake near the Sotkamo deposit (slightly affected by acid mine drainage) supplemented with nutrients was used for irrigation. Aeration was provided through a diffuser inserted at the base of the column. The iron- and sulphur-oxidizing bacterial culture used in inoculation of the columns, was enriched from surface water samples (pH 4.5-6.9) obtained from the ore deposit. The pH of irrigation solution was maintained with continuous titration with H2SO4. The ore was acid consuming in all tested conditions. The actual pH of the irrigation solutions after 140 days were 0.1-0.5 units over the target values in all columns. Leaching at low pH resulted in increased acid consumption of 160 and 38 H2SO4 g kg-1 ore at pH 1.5 and 2.0 after 140 days. Temperature, at pH 2.5, had also effect on acid consumption. At 50 ºC acid consumption was highest and lowest at 21 ºC, being 29 and 8 H2SO4 g kg-1 ore, respectively.

The pH of the irrigation solution clearly affected to the dissolution of nickel and zinc. Nickel solubilization rate was 3.3 times higher at pH 1.5 than at pH 3.0, being 0.42 and 0.13 % (Ni) d-1, respectively. At pH 1.5 valuable metals yields were 59 % for Ni, 52 % for Zn, 13 % for Cu and 16 % for Co, whereas at pH 3.0 yields were 15 % for Ni, 10 % for Zn, 0.5 % for Cu and 6 % for Co after 140 days of bioleaching. No significant bioleaching happened after that at pH 1.5, 2.5 or 3.0. At pH 2.0 the maximum yields were achieved after 230 days of bioleaching. Nickel and zinc leaching rates and yields decreased nearly linearly as pH increased. Copper did not bioleach at high pH (2.5-3.0). After the beginning, no further cobolt dissolution happened at pH 3.0. Decrease in leaching rates may be due to a lack of dissolved ferric iron, serving as a leaching agent, or metal dissolution barriers created by precipitates on the ore surfaces. The ferric iron concentration in PLS increased all the time at pH 1.5, being 36 g l-1 after 140 days. At pH 2.0 the ferric iron concentrations varied, being highest 3.8 g l-1 after 97 days. At 2.5 and 3.0 no ferric iron was present in PLS and iron concentration remained low, being 15 mg l-1.

After 60 days of bioleaching the leach liquor at pH 1.5 became jelly-like due to solubilization of Si from the ore, which contained 42 % (w w-1) of SiO2. Quartz, phlogopite, and feldspars (anorthite and microcline) were the main Si-containing phases. After 110 days the Si concentration reached 2.96 g L-1 at pH 1.5. Soluble Si increases the solution viscosity and thus hinders leach liquor percolation trough the heap, lowers the oxygen transfer rate, and complicates subsequent metal extraction. Although, dissolved Si did not affect the solubilization of valuable metals, the pH value of the PLS must be kept at over 1.5 to slow down Si-containing mineral dissolution. At pH 2.5 less than 200 mg L-1 Si was solubilized and different temperatures had no effect on Si dissolution at that pH.

Based on an optimisation between the maximum valuable metal yields, leaching rates, the acid consumption, and the low dissolution of cations (Si, Al, Ca, Mg and Mn), the leaching solution pH of 2.0 was recommended for a bioheap application. At pH 2.0, the maximum leaching yields were achieved after 230 days, being 54 % for Ni, 37 % for Zn, 13 % for Cu and 12 % for Co.

Temperature strongly affected the valuable metal yields at pH 2.5. Leaching at low temperature (7 ºC) resulted in yields of 24 % for Ni, 17 % for Zn, 2 % for Cu and 6 % for Co after 496 days. The Cu leaching increased all the time during the experiment at 7 ºC, while at other temperatures it slowed down after 100 days. The highest yields were obtained at 21 ºC (26 % for Ni, 18 % for Zn, 0.5 % for Cu and 6 % for Co) after 153 days. After re-inoculation (day 65) with a thermophilic Sulfolobus culture, leaching at 50 ºC accelerated but slowed down soon and resulted in 18 % for Ni, 11 for Zn, 0.3% for Cu and 2% for Co (after 140 days). In the column leaching study, after the maximum yields, longer leaching time did not result more metals in solutions.

The redox increased during the first two months at 7 ºC and reflected the start of ferrous iron oxidation and microbial activity. The concentration of ferric iron was around 400 mg L-1 after two months. After that ferric iron was present all the time at 7 ºC and this demonstrated that more ferric iron was available for the oxidation of the mineral sulphide than at other temperatures. The leach liquor redox potential stabilized to 500-600 mV (Ag0/AgCl reference) at 7 ºC after 40 days and at 21 ºC right after beginning, whereas at 35 ºC and at 50 ºC it varied between 300-500 mV. At 50 ºC, all dissolved iron was in ferrous form inspite the variation of redox. After 50 days Fe2+ and Fetot were both 350 mg L-1 indicating that iron oxidation and precipitation occurred at the same time. Brown precipitates accumulated to the surfaces of the agglomerated ore in columns from 7 ºC to 50 ºC. Additionally, bright yellow precipitates were formed indicating elemental sulphur or Na-jarosite accumulation at 7 ºC and 21 ºC.

After 50 days of bioleaching, at 7 ºC leach liquor total cell counts (108-109 cells mL-1) were significantly higher than at other temperatures (106-107 cells mL-1). Cell counts remained that high troughout the column study. At the end of the experiment, total cell counts in the leach residues were studied. At 7, 21, 35 and 50 ºC cell counts of the leach residues were 3.4· 108, 2.3· 108, 1.1· 107 and 8.7· 106 cells ore g-1, respectively. The pH did not affect at 21 ºC the numbers of microorganisms in the PLS and cell counts remained at 106-108 cell mL-1 throughout the study and the leach residues contained about 108 cells g ore-1.

The microbial community composition and dynamics was by investigated by DNA extraction PCR-DGGE-sequencing approach. The microbial community were not affected by pH. In contrast, temperature affected the microbial populations. After the first months, Acidithiobacillus ferrooxidans AP 310 (96-99% sequence similarity, accession DQ35518) was the only species detected at 7 ºC and was also present at other temperatures. After the data of this study was published (2007), two new Acidithiobacillus species were described, A. ferrivorans and A. ferridurans. Genetically these species are very near each other. The 16S rRNA gene sequences of the bands that corresponded 99% of A. ferrooxidans AP310 (DQ35518) were identified again in 2015 using the basic local alignment search tool (BLAST). The 16S rRNA gene sequences of A. ferrooxidans at temperatures of 7 and 21 ºC corresponded 99% as A. ferrivorans SS3 (CP002985). One of the 16S rRNA gene sequences of A. ferroxidans strains at 35 ºC corresponded 99% as A. ferridurans ATCC 3302 (NR_117036). At 50 ºC, no proper A. ferroxidans 16S rRNA gene sequences were gained with the used methods. The presence of A. ferroxidans at 50 ºC was concluded based on the fact that the DGGE band was in the same place as the other A. ferrooxidans bands. The 16S rRNA gene sequences of Acidithiobacillus ferrooxidans strains in pH between 1.5 and 3.0, at 21 ºC, corresponded also 99% as A. ferrivorans SS3 (CP002985). In the light of increased knowledge, these species cannot be separated with the denaturing gradient from 40 to 70% that were used in the DGGE. A. ferrooxidans, A. ferrivorans and A. ferridurans are able to oxidize both iron and sulphur compounds.

Leptospirillum ferrooxidans DSM 2705 (98-100%, X86776) and Sulfobacillus thermotolerans KR-1 (99%, DQ124681) were mainly detected at 21 ºC and 35 ºC. Sb. thermotolerans was present at 50 ºC. L. ferriphilum D1 (99 %, DQ665909) appeared after 300 days of bioleaching and was present in every leach residue, except at 7 ºC and pH 3.0. L. ferrooxidans and L. ferriphilum are able to oxidize only iron. Sb. thermotolerans is able to oxidize both iron and sulphur compounds.

Archaeal species were analyzed two times from leach liquors and three species were detected. A species related to an uncultured archaeon clone ant b7 (99%, DQ303249), nearest known species Thermoplasma acidiphilum DSM1728 (91%, AL445067) was present in all of the leach liquors except at pH 1.5. Archaea related to Sulfolobus metallicus DSM 6482 (98%, SM16SRRN1) were present at pH values 2.5 and 3.0 and in all other temperatures, except at 7 ºC. Sulfolobus metallicus is able to oxidize both iron and sulphur compounds. Ferroplasma acidiphilum DR1 (98%, AY222042) that can oxidize only iron, was present at pH 2.5 and 2.0, and in all temperatures, expect at 35 ºC.

The mixed iron- and sulphur-oxidizing culture in the recirculation solution at 7 ºC was used in the experiments where Fe2+-oxidation rate and optimum temperature were determined over a temperature range of 2-40 ºC. Two temperature optima of 22.4 ºC and 32.4 ºC were observed. This indicated the presence of both psychrotolerant and/ or mesophilic microorganisms in the culture. This supports the suggestion that A. ferrooxidans was actually A. ferrivorans, or both species were present. The specific oxidation rates for the culture were similar, with 13.5·10-8 and 12.8·10-8 mg Fe2+ cell-1 h-1 for 22.4 ºC and 32.4 ºC, respectively.

The two demonstration-scale bioheaps (17 000 t) at the Talvivaara mine site were operated and monitored by Talvivaara Mining Company for 30 months. After the start-up of heap irrigation, oxidation of pyrrhotite and pyrite increased the heap temperature in central locations up to 90 ºC. In the second winter temperatures inside the heaps decreased being still 80 ºC at the hottest spots. Leach liquor temperatures varied between 60 ºC and 15 ºC over the whole operation period. The target pH of the PLS was 2.0. Inspite of continuous titration pH varied during the 10 months between 3.5 and 3.0 and after that between 3.0 and 2.5.

The bacterial community composition on the heaps was monitored over time from manholes and the leach liquor collection ponds. At the end of the primary bioleach phase (18 months) cell counts were around 106 cells mL-1. Large temperature gradients resulted in the simultaneous presence of mesophilic and thermophilic iron- and sulphur-oxidisers in the heap. In the beginning diversity was broad, but decreased with time. A. ferrooxidans/ ferrivorans SS3 (99%, CP002985) was the dominant bacterium and an unknown bacterium related to clone H70 (91%, DQ328625) was present. After six months of bioheap operation L. ferrooxidans DSM 2705 (98%, X86776) was observed for the first time and it was present thereafter in nearly all samples. Archaea were analysed during the primary leaching phase from leach liquors. Two novel archaea and one archaea related to Thermoplasma acidophilum strain 122-1B2 (91-93%, NR_028235) were detected.

Several ore samples were drilled from the primary bioheaps after one year of bioheap operation. A. ferrooxidans/ A. ferrivorans SS3 (99%, CP002985) was present in nearly all samples. The novel bacterium related to clone H70 (91%, DQ328625) and A. caldus related bacteria (95%, AY427958) was detected from the areas of wide temperature variation. Sb. thermosulfidooxidans strain YN22 (99%, DQ650351) was found from the high temperature zones of the heap. Ferrimicrobium acidiphilum T23 (99%, AF251436) was present in the areas where temperature varied between 20 and 35 ºC. After 18 months of demonstration-scale heap operation, the heaps were reclaimed and restacked to the secondary bioheap. At the secondary leaching phase the community remained steady. A. ferrooxidans/ ferrivorans SS3 (99%, CP002985) dominated and the novel bacterium related to a clone H70 (91%, DQ328625) and L. ferrooxidans DSM 2705 (98-100%, X86776) were present in the leach liquors of secondary phase bioheaps.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Department of Chemistry and Bioengineering
Contributors: Halinen, A.
Number of pages: 71
Publication date: 27 Nov 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3630-4
ISBN (Electronic): 978-952-15-3656-4
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1347
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology

Research output: Book/ReportDoctoral thesisCollection of Articles

Heikot signaalit vesihuollossa

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O., Takala, A.
Number of pages: 3
Pages: 29-31
Publication date: 2013
Peer-reviewed: Unknown

Publication information

Journal: Vesitalous
Issue number: 4
ISSN (Print): 0505-3838
Original language: Finnish

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-12-12<br/>Publisher name: Maa- Ja Vesitekniikan Tuki

Source: researchoutputwizard
Source ID: 2276

Research output: Contribution to journalArticleProfessional

Helsinki sai ensimmäisen puhdistamonsa 1910; Helsinki gained its first wastewater treatment plant 1910

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Juuti, P., Katko, T., Rajala, R.
Pages: 49-50
Publication date: 2011
Peer-reviewed: Unknown

Publication information

Journal: Kuntatekniikka
Volume: 66
Issue number: 1
ISSN (Print): 1238-125X
Original language: Finnish

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 6247

Research output: Contribution to journalArticleProfessional

Highly compact TiO2 films by spray pyrolysis and application in perovskite solar cells

Transparent and pinhole free hole‐blocking layers such as TiO2 grown at low temperatures and by scalable processes are necessary to reduce production costs and thus enabling commercialization of perovskite solar cells. Here, the authors compare the transport properties of TiO2 compact layers grown by spray pyrolysis from commonly used titanium diisopropoxide bisacetylacetonate ([Ti(OPri)2(acac)2]) precursor to films grown by spray pyrolysis of TiCl4. Spray pyrolysis provides insights into the interdependence of precursor chemistry and electron transport properties of TiO2 films and their influence on the performance of the perovskite solar cells. X‐ray diffraction and X‐ray photoelectron spectroscopy data confirm the chemical and structural composition of the obtained films. Thin film deposition at lower temperature (150 °C) are conducted using TiCl4 to evaluate the influence of crystal growth and topography by scanning electron microscopy and atomic force microscopy as well as thickness (profilometry) and transmittance (UV/Vis spectroscopy) on the power conversion efficiency of perovskite solar cells. TiO2 compact layers grown from TiCl4 enhance the power conversion efficiency by acting as superior electron transfer medium and by reducing hysteresis behavior, when compared to films grown using titanium diisopropoxide bisacetylacetonate. UV/Vis spectroscopy and external quantum efficiency studies reveal the correlation of transmittance on the power conversion efficiency.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Chemistry & Advanced Materials, Department of Inorganic Chemistry, University of Cologne, École de technologie supérieure (ÉTS) Department of Electrical Engineering, 1100 rue Notre‐Dame Ouest Montréal (QC), H3C 1K3 Canada, Forschungszentrum Jülich (FZJ), Centre Énergie, Matériaux et Télécommunications, INRS, 1650 Boulevard Lionel Boulet, Varennes, QC, J3 × 1S2 Canada
Contributors: Möllmann, A., Gedamu, D., Vivo, P., Frohnhoven, R., Stadler, D., Fischer, T., Ka, I., Steinhorst, M., Nechache, R., Rosei, F., Cloutier, S. G., Kirchartz, T., Mathur, S.
Number of pages: 8
Publication date: Jan 2019
Peer-reviewed: Yes

Publication information

Journal: Advanced Engineering Materials
Volume: 21
Issue number: 4
Article number: 1801196
ISSN (Print): 1438-1656
Ratings: 
  • Scopus rating (2019): CiteScore 4.8 SJR 0.917 SNIP 1.151
Original language: English
Keywords: perovskite solar cells, compact layer, spray pyrolysis

Research output: Contribution to journalArticleScientificpeer-review

Highly ductile amorphous oxide at room temperature and high strain rate

Oxide glasses are an integral part of the modern world, but their usefulness can be limited by their characteristic brittleness at room temperature. We show that amorphous aluminum oxide can permanently deform without fracture at room temperature and high strain rate by a viscous creep mechanism. These thin-films can reach flow stress at room temperature and can flow plastically up to a total elongation of 100%, provided that the material is dense and free of geometrical flaws. Our study demonstrates a much higher ductility for an amorphous oxide at low temperature than previous observations. This discovery may facilitate the realization of damage-tolerant glass materials that contribute in new ways, with the potential to improve the mechanical resistance and reliability of applications such as electronic devices and batteries.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Physics, Research group: Nanophotonics, Italian Institute of Technology, Erich Schmid Institute of Materials Science, Bruker, Norwegian Univ. of Sci. and Technol., University of Lyon
Contributors: Frankberg, E. J., Kalikka, J., Ferré, F. G., Joly-Pottuz, L., Salminen, T., Hintikka, J., Hokka, M., Koneti, S., Douillard, T., Le Saint, B., Kreiml, P., Cordill, M. J., Epicier, T., Stauffer, D., Vanazzi, M., Roiban, L., Akola, J., Fonzo, F. D., Levänen, E., Masenelli-Varlot, K.
Number of pages: 6
Pages: 864-869
Publication date: 15 Nov 2019
Peer-reviewed: Yes

Publication information

Journal: Science
Volume: 366
Issue number: 6467
ISSN (Print): 0036-8075
Ratings: 
  • Scopus rating (2019): CiteScore 45.3 SJR 13.11 SNIP 7.521
Original language: English
ASJC Scopus subject areas: General
Source: Scopus
Source ID: 85075053772

Research output: Contribution to journalArticleScientificpeer-review

High rate anaerobic treatment of LCFA-containing wastewater at low temperature

Fats, oil and grease (FOG) are a significant constituent in numerous wastewaters such as those in dairy industry. The hydrolysis of FOG result in the production of long chain fatty acids (LCFA) which destabilize the anaerobic treatment process due to their physico-chemical and microbial toxicity effects. Harnessing the high methanogenic potential of FOG necessitates effective treatment of high LCFA loads, wherein the feasibility of LCFA treatment at low temperatures has been not investigated up to now. The aim of this thesis was to study the feasibility of high-rate anaerobic treatment of LCFA-rich wastewaters at low ambient temperatures using dairy wastewater.

The screening of mesophilic inocula for treatment of mixed LCFA containing synthetic dairy wastewater (SDW) in batch studies showed that granular sludge inoculum achieved faster and higher methane yields (76-82% of theoretical yield) than the two municipal digestates (1-72%) at both 20 and 10°C. The LCFA
degradation capacity in the granular sludge inoculum was attributed to the presence of β-oxidizing bacteria from the family Syntrophaceae (Syntrophus and uncultured taxa), the acetotrophic activity of Methanosaeta and the putative syntrophic acetate oxidizing bacteria (SAOB).

Continuous high-rate treatment of SDW was found to be feasible in expanded granular sludge bed (EGSB) reactors at 20°C (hydraulic retention time (HRT) 24 h, LCFA loading rate (OLR) 670 mgCOD-LCFA/L·d) with a soluble COD (sCOD) removal of 84–91% and methane yield of 44–51%. SDW feeding for longer than two months resulted in LCFA accumulation, which led to granular sludge flotation (36-57%) and disintegration (reduction in d50 of 24–33% and 75–84% in settled and washed-out granules, respectively). To counter the LCFA induced granular sludge disintegration and flotation, a novel reactor type, dynamic sludge chamber-fixed film (DSC-FF), was designed and achieved sCOD removal of 87-98% at HRTs from 12-72 h (LCFA loading rate 220-1333 mgCOD-LCFA/L·d) at 20°C. Moreover, even at the 12 h HRT, the unsaturated LCFAs
(linoleate and oleate) were treated and only part of saturated LCFAs (stearate, palmitate) remained after treatment in the DSC-FF reactors. An increased methanogenic activity was established in the reactor sludges during reactor runs, which was evidenced by a higher acetotrophic activity in the granular sludge (from DSC), and a higher hydrogenotrophic activity in the biofilm (from FF) indicating development of distinct metabolic capabilities in the different reactor compartments.

High throughput 16S rRNA sequencing showed that the relative abundance of the acetoclastic methanogen, Methanosaeta, increased in EGSB reactors and in the active microbiomes of granules (from DSC) and biofilm (from FF) when fed with increasing LCFA concentrations. This suggested acetoclastic methanogenesis as the predominant methanogenesis pathway for SDW and presumably, LCFA degradation at 20°C. Relative abundances of the taxa known to have β-oxidizing and methanogenic activity were high in the active microbiomes during SDW treatment in DSC-FF reactors at 20°C. The biofilm
microbiome (from FF) had a prominent presence of the β-oxidizing bacteria Syntrophus and of the hydrogenotrophic methanogen Methanospirillum in comparison to the presence of the acetogenic bacteria, Syntrophobacter, Desulfobulbus, and Geobacter, and of the acetoclastic methanogen in the
granular sludge microbiome, suggesting a role of these different taxa during LCFA degradation.

In summary, this work demonstrated successful inoculum selection at low temperatures (10 and 20°C), and high-rate anaerobic LCFA degradation at 20°C using novel reactor design (here, DSC-FF). The key bacterial and archaeal taxa involved in the anaerobic conversion of LCFA to methane at 20°C were also
deduced.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Materials Science and Environmental Engineering
Contributors: Singh, S.
Number of pages: 139
Publication date: 11 Dec 2019

Publication information

Publisher: Tampere University
Original language: English

Publication series

Name: Tampere University Dissertations
URLs: 

Research output: Book/ReportDoctoral thesisCollection of Articles

High rate autotrophic denitrification in fluidized-bed biofilm reactors

High rate, high efficiency thiosulfate-driven autotrophic denitrification and denitritation with Thiobacillus denitrificans dominated biofilms were achieved in fluidized-bed reactors (FBRs) operated at 20.0 ± 2.0 and 30.0 ± 0.2 °C. Complete nitrate removal was obtained even at nitrate loading rate and hydraulic retention time (HRT) of 600 mg L−1 h−1 and 10 min, respectively. Further decrease of HRT to 5 min resulted in 50% of nitrate removal efficiency. Nitrite did not accumulate when nitrate was used as electron acceptor unless HRT was decreased to 5 min. Effluent pH remained at 5.8 during denitrification. When nitrite was supplemented as the electron acceptor, denitritation effectively proceeded with the highest nitrite loading rate of 228 mg L−1 h−1. Similar denitrification and denitritation performances were obtained at 20.0 ± 2.0 and 30.0 ± 0.2 °C. Batch assays conducted at temperature range from 1 to 46 °C, however, showed a significant impact of temperature on autotrophic denitrification. Ratkowsky model was used to estimate the minimum, optimal and maximum growth temperatures of T. denitrificans dominated culture that were below 1, 26.6 and 50.8 °C, respectively.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Zou, G., Papirio, S., Lakaniemi, A., Ahoranta, S., Puhakka, J.
Pages: 1287-1294
Publication date: 2016
Peer-reviewed: Yes
Early online date: 28 Sep 2015

Publication information

Journal: Chemical Engineering Journal
Volume: 284
ISSN (Print): 1385-8947
Ratings: 
  • Scopus rating (2016): CiteScore 9.7 SJR 1.758 SNIP 1.952
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

High-solids anaerobic digestion requires a trade-off between total solids, inoculum-to-substrate ratio and ammonia inhibition

Increasing total solids in anaerobic digestion can reduce the methane yield by highly complex bio-physical–chemical mechanisms. Therefore, understanding those mechanisms and their main drivers becomes crucial to optimize this waste treatment biotechnology. In this study, seven batch experiments were conducted to investigate the effects of increasing the initial total solids in high-solids anaerobic digestion of the organic fraction of municipal solid waste. With inoculum-to-substrate ratio = 1.5 g VS/g VS and maximum total solids ≤ 19.6%, mono-digestion of the organic fraction of municipal solid waste showed a methane yield = 174–236 NmL CH 4 /g VS. With inoculum-to-substrate ratio ≤ 1.0 g VS/g VS and maximum total solids ≥ 24.0%, mono-digestion experiments acidified. Co-digestion of the organic fraction of municipal solid waste and beech sawdust permitted to reduce the inoculum-to-substrate ratio to 0.16 g VS/g VS while increasing total solids up to 30.2%, though achieving a lower methane yield (117–156 NmL CH 4 /g VS). At each inoculum-to-substrate ratio, higher total solids corresponded to higher ammonia and volatile fatty acid accumulation. Thus, a 40% lower methane yield for mono-digestion was observed at a NH 3 concentration ≥ 2.3 g N–NH 3 /kg reactor content and total solids = 15.0%. Meanwhile, co-digestion lowered the nitrogen content, being the risk of acidification exacerbated only at total solids ≥ 20.0%. Therefore, the biodegradability of the substrate, as well as the operational total solids and inoculum-to-substrate ratio, are closely interrelated parameters determining the success of methanogenesis, but also the risk of ammonia inhibition in high-solids anaerobic digestion.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, LBE, INRA, ENEA/CREATE/Università Degli Studi Napoli Federico II
Contributors: Pastor-Poquet, V., Papirio, S., Trably, E., Rintala, J., Escudié, R., Esposito, G.
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
ISSN (Print): 1735-1472
Ratings: 
  • Scopus rating (2019): CiteScore 2.9 SJR 0.518 SNIP 1.016
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Environmental Chemistry, Agricultural and Biological Sciences(all)
Keywords: Batch experiments, Co-digestion, High-solids anaerobic digestion, Methane yield, Organic fraction of municipal solid waste, Thermophilic, Volatile fatty acids
Source: Scopus
Source ID: 85061488051

Research output: Contribution to journalArticleScientificpeer-review

Historian hajuista tuoksujen tulevaisuuteen: pääkaupunkiseudun jätevedenpuhdistuksen keskeiset päätökset Espoon näkökulmasta

"From Stinky History to Fragrant Future. Waste water treatment of the metropolitan area - central decisions on the point of view of Espoo is written by Adjunct Professor, PhD Petri S Juuti. The book examines how water and waste water services started and developed in Espoo from the 1950s to the 2000s. Furthermore, it is discussed what are the challenges of the future looked from the point of view of the professionals of the water sector."

Tässä kirjassa käydään läpi pk-seudun jätevedenkäsittelyn historia ja yhteistyövaiheet aina 1950-luvulta 2010-luvulle asti Espoon näkökulmasta. Tutkimuksen pääkysymyksiä ovat mm.:

– Miksi jätevesien puhdistaminen on keskitetty vain yhteen puhdistamoon?
– Miksi Espoossa tehdään ylikunnallista yhteistyötä jätevesienpuhdistuksessa?
– Miten jätevesien puhdistusyhteistyö on alkanut ja muuttunut vuosien varrella?
– Miksi puhdistetaan naapurikuntien jätevesiä?
– Millaista keskustelua jätevedet ovat herättäneet menneisyydessä ja millaista tulevaisuutta koskevaa keskustelua niistä on käyty?

Oikean strategian toteuttamisessa tarvitaan yhteistyötä ja osaavaa johtamista. Espoo on voinut historiassa käyttää omien resurssiensa lisäksi vesihuollossa myös naapurikuntien resursseja. Nyt tarkastelukohteena olevan jätevesienpuhdistuksen osalta tämä on tarkoittanut sitä, että naapurikunnat ovat maksaneet osansa ja osin enemmänkin kuin osansa jätevesiensä puhdistamisesta ja varsinkin Suomenojan jätevedenpuhdistamosta. Näiden lisäresurssien turvin historian saatossa kertyneet resurssit ovat mahdollistaneet nykyisen hyvän tilanteen pitkän tähtäimen strategisten päätösten avulla. Näistä strategisista päätöksistä yksi konkreettisin näyttö ovat jätevesiä koskevat sopimukset naapurikuntien kanssa. Sopimukset ja niiden takana olleet päätökset ovat hyvin kaukonäköisiä ja kaikkia osapuolia sitovia.

Ne osaltaan mahdollistavat, että valittavana on ollut kehityspolkuja, joita kaikkialla ei ole ollut käytössä. Vuoden 2010 alusta alkaen Espoon vesihuolto on toiminut yhdessä pk-seudun organisaatiossa alueen muiden vesilaitosten kanssa, HSY:n organisaation alaisuudessa.

General information

Publication status: Published
MoE publication type: C1 Separate scientific books
Organisations: Civil Engineering
Contributors: Juuti, P.
Number of pages: 280
Publication date: 2017

Publication information

Publisher: Tampere University Press
ISBN (Electronic): 978-952-03-0420-1
Original language: Finnish

Research output: Book/ReportBookScientificpeer-review

Historian hajuista tuoksujen tulevaisuuteen: Pääkaupunkiseudun jäetevedenpuhdistuksen keskeiset päätökset Espoon näkökulmasta

General information

Publication status: Published
Organisations: Civil Engineering
Contributors: Katko, T. S.
Number of pages: 1
Publication date: 2017

Publication information

Place of publication: Tampere
Publisher: TamPub
Year: 2017
ISBN (Print): 978-952-03-0419-5
Original language: Finnish

Research output: Other contributionScientific

Historical development of water and sanitation services

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P. S., Katko, T. S.
Pages: 25-38
Publication date: 2005

Host publication information

Title of host publication: Water, Time and European Cities. History matters for the Futures
Place of publication: Tampere
Publisher: Tampere University Press
Editors: Juuti, P. S., Katko, T. S.
ISBN (Print): 951-44-6337-4

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 18529

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Historical development paths and means for winning the challenge of aging water services infrastructure

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Rajala, R., Juuti, P., Hukka, J., Katko, T. S.
Number of pages: 16
Pages: 15-30
Publication date: 2019

Host publication information

Title of host publication: Resilient Water Services and Systems: The Foundation of Well-Being
Publisher: IWA Publishing
ISBN (Print): 9781780409764
ISBN (Electronic): 9781780409771

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

History of water and sanitation services in Finland in the urban-rural mixture : The Case of the City of Tampere, Finland

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Katko, T. S., Juuti, P. S.
Number of pages: 22
Pages: 498-519
Publication date: 2014

Host publication information

Title of host publication: A History of Water: Water and Urbanization: Series III, Volume 1
Place of publication: London
Publisher: I. B. Tauris
Editors: Tvedt, T., Oestigaard, T.
ISBN (Print): 978-1780764474

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-12-11<br/>Publisher name: I. B. Tauris

Source: researchoutputwizard
Source ID: 681

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

HPLC-SEC: a new approach to characterise complex wastewater effluents

This work investigates the use of HPLC-SEC to characterise dissolved organic matter (DOM) of complex wastewater effluents. A silica-based column, sodium acetate eluent and multiple detections were employed: UV-254 absorbance for humictype, and tryptophan-like (Ex/Em = 270/355) and tyrosine-like (Ex/Em = 270/310) fluorescence for protein type compounds. Effects of eluent pH, eluent ionic strength and injection volume on separation efficiency were tested. Humic-type and protein-type fractions were clearly differentiated and eluted within and out of calibration range. Eluent ionic strength had the greatest influence on global resolution; the lowest eluent concentration of 0.01 M produced the best separation for all wastewater effluents tested at any detection. UV-254 absorbance was higher at neutral and basic eluent pH while tryptophan-like fluorescence depended on the sample composition rather than on the eluent pH or ionic strength. Tyrosine-like fluorescence decreased significantly with the increase of eluent ionic strength. Accurate molecular weight measurements could not be done, the separation being influenced by secondary interactions, but could be approximated using separate calibrations with sodium salts of polystyrene-sulfonates and protein standards. The results show that this method is suitable for determining DOM in wastewater at low eluent concentrations (up to 0.03 M), at neutral or slightly basic pH.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Degree Programme in Energy and Environmental Engineering, Tampere University of Applied Sciences, Department of Biological and Environmental Science, University of Jyväskylä
Contributors: Szabo, H. M., Lepistö, R., Tuhkanen, T.
Number of pages: 14
Pages: 257-270
Publication date: 19 Feb 2016
Peer-reviewed: Yes

Publication information

Journal: International Journal of Environmental Analytical Chemistry
Volume: 96
Issue number: 3
ISSN (Print): 0306-7319
Ratings: 
  • Scopus rating (2016): CiteScore 2.5 SJR 0.368 SNIP 0.501
Original language: English
ASJC Scopus subject areas: Analytical Chemistry, Environmental Chemistry, Soil Science, Health, Toxicology and Mutagenesis, Pollution, Waste Management and Disposal, Water Science and Technology, Public Health, Environmental and Occupational Health
Keywords: DOM, Fluorescence, greywater, humic, ionic strength, proteins, tryptophan, UV-254

Bibliographical note

EXT="Tuhkanen, Tuula"

Source: Scopus
Source ID: 84961206778

Research output: Contribution to journalArticleScientificpeer-review

Hybrid barrier films by atmospheric inline plasma deposition on sol-gel coated PE-cardboard

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Energy and Process Engineering
Contributors: Nättinen, K., Nikkola, J., Mannila, J., Vartiainen, J., Tuominen, M., Lavonen, J.
Pages: 8 p
Publication date: 2009

Host publication information

Title of host publication: Coatings for Plastics at NPE 2009, June 23-24, 2009, McCormick Place, Chicago, IL

Bibliographical note

Contribution: organisation=epr pap,FACT1=1

Source: researchoutputwizard
Source ID: 10943

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Hydrodynamic drag and velocity of micro-bubbles in dilute paper machine suspensions

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Haapala, A., Honkanen, M., Liimatainen, H., Stoor, T., Niinimäki, J.
Pages: 956-964
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Chemical Engineering Journal
Volume: 162
ISSN (Print): 1385-8947
Ratings: 
  • Scopus rating (2010): SJR 1.246 SNIP 1.54
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 7971

Research output: Contribution to journalArticleScientificpeer-review

Hydrogen sulfide removal from synthetic biogas using anoxic biofilm reactors

The aim of this work was to develop and study anoxic bioreactors for the removal of reduced inorganic sulfur compounds from liquid and gaseous waste streams. In addition, the aim was to enable process integration for the simultaneous treatment of H2S contaminated gas streams and NO3--containing wastewater. The experiments related to sulfide oxidation in the liquid phase were conducted in two different attached growth bioreactors, i.e. a fluidized-bed reactor (FBR) and a moving bed biofilm reactor (MBBR), inoculated with the same mixed culture of sulfur-oxidizing nitrate-reducing (SO-NR) bacteria. The bioreactors were operated under different nitrogen-to-sulfur (N/S) molar ratios using S2O32- and NO3- as an energy source and electron acceptor, respectively. Results revealed that both the FBR and MBBR achieved S2O32- removal efficiencies (RE) >98% and completely removed NO3- at an N/S ratio of 0.5. Under severe nitrate limitation (N/S ratio of 0.1), the S2O32- RE in the MBBR (37.8%) was higher than that observed in the FBR (26.1%). In addition, the MBBR showed better resilience to nitrate limitation than the FBR as the S2O32- RE was recovered to 94% within 1 day after restoring the feed N/S ratio to 0.5, while it took 3 days to obtain 80% S2O32- RE in the FBR. Artificial neural network models were successfully used to predict the FBR and MBBR performance, i.e. S2O32- and NO3- RE as well as sulfate production. The SO-NR biomass from the MBBR was used to inoculate an anoxic biotrickling filter (BTF), which was studied for simultaneous treatment of H2S and NO3- containing waste streams. In the anoxic BTF, a maximum H2S elimination capacity (EC) of 19.2 g S m-3 h-1 (99% RE) was obtained at an inlet H2S load of 20.0 g S m-3 h-1 (~500 ppmv) and an N/S ratio of ~1.7. As some NO3--containing wastewaters can also contain organic compounds, the anoxic BTF inoculated with Paracoccus versutus strain MAL 1HM19 was studied for the simultaneous treatment of H2S, NO3- and organic carbon containing waste streams. With this BTF, NO3- and acetate removal rates of 16.7 g NO3--N m-3 h-1 and 42.0 g acetate m-3 h-1, respectively, were achieved, which was higher than the values observed in the BTF inoculated with the mixed culture of autotrophic SO-NR bacteria (11.1 g NO3--N m-3 h-1 and 10.2 g acetate m-3 h-1). Anoxic BTFs were operated under several transient conditions (i.e. varied gas and trickling liquid flow rates, intermittent NO3- supply and H2S shock loads) to evaluate the impacts of sudden changes that usually occur in practical applications. The different transient conditions significantly affected the H2S EC of the anoxic BTF. After applying H2S shock loads, the H2S RE fully recovered to >99% within 1.7 days after resuming normal operation. In summary, the MBBR was more effective for the removal of S2O32- than the FBR, especially under nitrate limited conditions. Based on the short recovery times after exposure to transient-state conditions, the anoxic MBBR and BTF were found to be resilient and robust systems for removal of reduced sulfur compounds under autotrophic and mixotrophic conditions.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Materials Science and Environmental Engineering
Contributors: Khanongnuch, R.
Number of pages: 187
Publication date: 21 May 2019

Publication information

Publisher: Tampere University
Original language: English

Publication series

Name: Tampere University Dissertations
URLs: 

Research output: Book/ReportDoctoral thesisCollection of Articles

Hydrolysed cellulose material as sulfate reduction electron donor to treat metal- and sulfate containing waste water

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Former organisation of the author
Contributors: Lakaniemi, A., Nevatalo, L., Kaksonen, A., Puhakka, J.
Pages: 326-326
Publication date: 2007
Peer-reviewed: Yes

Publication information

Journal: Advanced Materials Research
Volume: 20-21
ISSN (Print): 1022-6680
Ratings: 
  • Scopus rating (2007): SJR 0.18 SNIP 0.753
Original language: English

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14835

Research output: Contribution to journalArticleScientificpeer-review

Hydrothermal carbonization of pulp mill streams

The progress of the conversion, the yield, the structure and the morphology of the produced carbonaceous materials as a function of time were systematically studied with pyrolysis-GC/FID and FESEM microscope. The conversion of galactoglucomannan, bleached kraft pulp and TEMPO oxidized cellulose nanofibrils followed the reaction route of glucose being slower though with fibrous material, higher molar mass and viscosity. The conversion of kraft lignin was minor following completely different reaction route. Carbonaceous particles of different shape and size were produced with yields between 23% and 73% after 4 h with being higher for lignin than carbohydrates. According to the results, potential pulp mill streams represent lignocellulosic resources for generation of carbonaceous materials.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Materials Science, Research group: Materials Characterization, VTT Technical Research Centre of Finland
Contributors: Wikberg, H., Ohra-aho, T., Honkanen, M., Kanerva, H., Harlin, A., Vippola, M., Laine, C.
Number of pages: 9
Pages: 236-244
Publication date: 1 Jul 2016
Peer-reviewed: Yes

Publication information

Journal: Bioresource Technology
Volume: 212
ISSN (Print): 0960-8524
Ratings: 
  • Scopus rating (2016): CiteScore 9.9 SJR 2.215 SNIP 1.945
Original language: English
ASJC Scopus subject areas: Bioengineering, Environmental Engineering, Waste Management and Disposal
Keywords: Galactoglucomannan, Hydrothermal carbonization, Kraft lignin, Kraft pulp, Pulp mill

Bibliographical note

EXT="Harlin, Ali"

Source: Scopus
Source ID: 84963954557

Research output: Contribution to journalArticleScientificpeer-review

Hyvän veden ja hyvien yhteyksien kaupunki - Riihimäen Veden historia

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Department of Civil Engineering, Former organisation of the author
Contributors: Juuti, P., Rajala, R., Pietilä, P., Katko, T.
Pages: 36-40
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: Vesitalous
Volume: 52
Issue number: 5
ISSN (Print): 0505-3838
Original language: Finnish

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 6248

Research output: Contribution to journalArticleScientificpeer-review

Hyvän veden ja hyvien yhteyksien kaupunki : Riihimäen Veden historia

General information

Publication status: Published
MoE publication type: C1 Separate scientific books
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Juuti, P., Rajala, R. P., Pietilä, P. E., Katko, T. S.
Number of pages: 336
Publication date: 2010

Publication information

Publisher: Riihimäen Vesi
ISBN (Print): 978-952-5571-29-5
Original language: Finnish

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8244

Research output: Book/ReportBookScientificpeer-review

Hyvien yhteyksien ja hyvän veden kaupunki

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Civil Engineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, University of Tampere
Contributors: Juuti, P., Rajala, R., Pietilä, P.
Pages: 314-333
Publication date: 2010

Host publication information

Title of host publication:  Hyvän veden ja hyvien yhteyksien kaupunki : Riihimäen Veden historia
Publisher: TamPub
Editors: Juuti, P., Rajala, R., Pietilä, P., Katko, T.
ISBN (Print): 978-952-5571-29-5
ISBN (Electronic): 978-951-44-8136-9

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Identification of Wastewater Leaching into the Wells by HPLC-SEC Using UV and Fluorescence Detection

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Szabo, H. M., Tuhkanen, T.
Pages: 893-897
Publication date: 2011

Host publication information

Title of host publication: Survival and Sustainability : Environmental concerns in the 21st Century
Publisher: Springer Berlin Heidelberg
Editors: Huseyin, G., Umut, T., James, W. L.
ISBN (Print): 978-3-540-95990-8
ISBN (Electronic): 978-3-540-95991-5

Publication series

Name: Environmental Earth Sciences
Publisher: Springer Berlin Heidelberg

Bibliographical note

ei ut-numeroa 17.5.2014<br/>Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 7342

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Ikääntyvä infra - vesihuollon keskeisin haaste

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O., Katko, T., Takala, A.
Pages: 22-24
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Vesitalous
Issue number: 6
ISSN (Print): 0505-3838
Original language: Finnish

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8050

Research output: Contribution to journalReview ArticleScientificpeer-review

Ilmasto muuttuu, riittääkö vesi?

General information

Publication status: Published
MoE publication type: E1 Popularised article, newspaper article
Organisations: Bio- ja ympäristötekniikka, Former organisation of the author
Contributors: Juuti, P., Katko, T.
Publication date: 2007
Peer-reviewed: Unknown

Publication information

Journal: Aamulehti
ISSN (Print): 0355-6913
Original language: English

Bibliographical note

Contribution: organisation=bio,FACT1=1

Source: researchoutputwizard
Source ID: 14483

Research output: Contribution to journalArticleGeneral public

Impact of heavy metals on denitrification of simulated mining wastewaters

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Zou, G., Ylinen, A., Di Capua, F., Papirio, S., Lakaniemi, A., Puhakka, J.
Number of pages: 4
Pages: 500-503
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: Advanced Materials Research
Volume: 825
ISSN (Print): 1022-6680
Ratings: 
  • Scopus rating (2013): CiteScore 0.11 SJR 0.142 SNIP 0.197
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-11-29<br/>Publisher name: Trans Tech Publications Ltd.

Source: researchoutputwizard
Source ID: 3792

Research output: Contribution to journalArticleScientificpeer-review

Impacts of changing operational parameters of in situ chemical oxidation (ISCO) on removal of aged PAHs from soil

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Cajal-Marinosa, P., de la Calle, R., Rivas, F. J., Tuhkanen, T.
Pages: 429-436
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Journal of Advanced Oxidation Technologies
Volume: 15
Issue number: 2
ISSN (Print): 1203-8407
Ratings: 
  • Scopus rating (2012): CiteScore 1.4 SJR 0.408 SNIP 0.495
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: Science & Technology Integration,

Source: researchoutputwizard
Source ID: 3951

Research output: Contribution to journalArticleScientificpeer-review

Impacts of short-term temperature fluctuations on biohydrogen production and resilience of thermophilic microbial communities

Anaerobic microflora enriched for dark fermentative H2 production from a mixture of glucose and xylose was used in batch cultivations to determine the effects of sudden short-term temperature fluctuations on H2 yield and microbial community composition. Batch cultures initially cultivated at 55 °C (control) were subjected to downward (from 55 °C to 35 °C or 45 °C) or upward (from 55 °C to 65 °C or 75 °C) temperature shifts for 48 h after which, each culture was transferred to a fresh medium and cultivated again at 55 °C for two consecutive batch cycles. The average H2 yield obtained during the first cultivation at 55 °C was 2.1 ± 0.14 mol H2 mol-1 hexose equivalent. During the temperature shifts, the obtained H2 yields were 1.8 ± 0.15, 1.6 ± 0.27 and 1.9 ± 0.00 mol H2 mol-1 hexose equivalent at 35 °C, 45 °C and 65 °C, respectively, while no metabolic activity was observed at 75 °C. The sugars were completely utilized during the 48 h temperature shift to 35 °C but not at 65 °C and 45 °C. At the end of the second cycle after the different temperature shifts, the H2 yield obtained was 96.5, 91.6, 79.9 and 54.1% (second cycle after temperature shift to 35 °C, 45 °C, 65 °C and 75 °C, respectively) when compared to the average H2 yield produced in the control at 55 °C. Characterization of the microbial communities present in the control culture at 55 °C showed the predominance of Thermoanaerobacteriales, Clostridiales and Bacilliales. The microbial community composition differed based on the fluctuation temperature with Thermoanaerobacteriales being most dominant during the upward temperature fluctuations and Clostridiales being the most dominant during the downward temperature fluctuations.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy, INRA
Contributors: Okonkwo, O., Escudié, R., Bernet, N., Mangayil, R., Lakaniemi, A., Trably, E.
Pages: 8028-8037
Publication date: 29 Mar 2019
Peer-reviewed: Yes

Publication information

Journal: International Journal of Hydrogen Energy
Volume: 44
Issue number: 16
ISSN (Print): 0360-3199
Ratings: 
  • Scopus rating (2019): CiteScore 8 SJR 1.141 SNIP 1.377
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Importance and challenges of sharing experiences among an international and interdisciplinary group of doctoral students

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Kurki, V., Sidaraviciute, R., Sörensen, J., Kibocha, S. N., Retike, I., Ikobe, G., Tichonovas, M., Elijosiute, E., Rajala, R.
Number of pages: 7
Pages: 45-51
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Ympäristöhistoria: Finnish Journal of Environmental History
Issue number: 1/2015
ISSN (Print): 1799-6953
Original language: English

Bibliographical note

EXT="Kibocha, Samuel Ngari"
EXT="Rajala, Riikka"

Research output: Contribution to journalArticleScientificpeer-review

Improved bioconversion of crude glycerol to hydrogen by statistical optimization of media components

Bioconversion of crude glycerol to hydrogen has gained importance as it addresses both sustainable energy production and waste disposal issues. Until recently, statistical optimizations of crude glycerol bioconversion to hydrogen have been greatly focused on pure strains. In this study, biohydrogen production from crude glycerol by an enriched microbial culture (predominated with Clostridium species) was improved by statistical optimization of media components. Plackett-Burman design identified MgCl2.6H2O and KCl with negative effect on hydrogen production and selected NH4Cl, K2HPO4 and KH2PO4 as significant variables. Box-Behnken design indicated the optimal region beyond design area and studies were continued by ridge analysis. Central composite face centered design envisaged a maximal hydrogen yield of 1.41mol-H2/mol-glycerolconsumed at concentrations 4.40g/L and 2.27g/L for NH4Cl and KH2PO4 respectively. Confirmation experiment with the optimized media (NH4Cl, 4.40g/L; K2HPO4, 1.6g/L; KH2PO4, 2.27g/L; MgCl2.6H2O, 1.0g/L; KCl, 1.0g/L; Na-acetate.3H2O, 1.0g/L and tryptone, 2.0g/L) revealed an excellent correlation between predicted and experimental hydrogen yield. Optimization of media components by design of experiments enhanced hydrogen yield by 29%.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Tampere University of Technology, Department of Signal Processing, Urban circular bioeconomy (UrCirBio)
Contributors: Mangayil, R., Aho, T., Karp, M., Santala, V.
Number of pages: 7
Pages: 583-589
Publication date: 1 Mar 2015
Peer-reviewed: Yes

Publication information

Journal: Renewable Energy
Volume: 75
ISSN (Print): 0960-1481
Ratings: 
  • Scopus rating (2015): CiteScore 7.2 SJR 1.767 SNIP 2.098
Original language: English
ASJC Scopus subject areas: Renewable Energy, Sustainability and the Environment
Keywords: Biohydrogen, Crude glycerol, Optimization, Response surface methodology

Bibliographical note

Available online 3 November 2014 : Volume 75, March 2015, Pages 583-589<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-12-12<br/>Publisher name: Pergamon; The World Renewable Energy Network

Source: researchoutputwizard
Source ID: 1020

Research output: Contribution to journalArticleScientificpeer-review

Improved water services cooperation through clarification of rules and roles

Water services face global challenges, many of which are institutional by nature. While technical solutions may suit several situations, institutional frameworks are likely to vary more. On the basis of constructive research approach and new institutional economics we analyze and illustrate water services and the roles of various water sector actors in Finnish water utility setting using the "soccer analogy" by the Nobel Laureate D.C. North: Institutions are the "formal and informal rules of the game" while organizations are the "players". Additionally, we assess the Finnish water governance system and discuss issues of scale and fragmentation and distinguish terms water provision and production. Finally, we elaborate the limitations of the soccer analogy to water services through ownership of the systems. According to the soccer analogy, inclusive institutional development requires skillful players (competent staff), team play (collaboration), proper coaching (education), supporters (citizens, media), managers (policymakers), and referees (authorities). We argue that institutional diversity and player/stakeholder collaboration are the foundation for enhancing good multi-level water governance, and that water management, although fragmented, should be seen as a connector of different sectors. For successful outcomes, scientific results should be communicated to public in more common language.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Inha, L. M., Katko, T. S., Rajala, R. P.
Publication date: 19 Oct 2019
Peer-reviewed: Yes

Publication information

Journal: Water (Switzerland)
Volume: 11
Issue number: 10
Article number: 2172
ISSN (Print): 2073-4441
Ratings: 
  • Scopus rating (2019): CiteScore 3 SJR 0.657 SNIP 1.074
Original language: English
ASJC Scopus subject areas: Biochemistry, Geography, Planning and Development, Aquatic Science, Water Science and Technology
Keywords: Good governance, Institutional diversity, Institutions, Rules and roles, Soccer analogy, Stakeholder collaboration
Electronic versions: 
Source: Scopus
Source ID: 85074329077

Research output: Contribution to journalArticleScientificpeer-review

Increasing oxygen deficiency changes rare and moderately abundant bacterial communities in coastal soft sediments

Coastal hypoxia is a major environmental problem worldwide. Hypoxia-induced changes in sediment bacterial communities harm marine ecosystems and alter biogeochemical cycles. Nevertheless, the resistance of sediment bacterial communities to hypoxic stress is unknown. We investigated changes in bacterial communities during hypoxic-anoxic disturbance by artificially inducing oxygen deficiency to the seafloor for 0, 3, 7, and 48 days, with subsequent molecular biological analyses. We further investigated relationships between bacterial communities, benthic macrofauna and nutrient effluxes across the sediment-water-interface during hypoxic-anoxic stress, considering differentially abundant operational taxonomic units (OTUs). The composition of the moderately abundant OTUs changed significantly after seven days of oxygen deficiency, while the abundant and rare OTUs first changed after 48 days. High bacterial diversity maintained the resistance of the communities during oxygen deficiency until it dropped after 48 days, likely due to anoxia-induced loss of macrofaunal diversity and bioturbation. Nutrient fluxes, especially ammonium, correlated positively with the moderate and rare OTUs, including potential sulfate reducers. Correlations may reflect bacteria-mediated nutrient effluxes that accelerate eutrophication. The study suggests that even slightly higher bottom-water oxygen concentrations, which could sustain macrofaunal bioturbation, enable bacterial communities to resist large compositional changes and decrease the harmful consequences of hypoxia in marine ecosystems.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy, Helsinki University, Karolinska Institutet, Univ Helsinki, University of Helsinki, Dept Geog, Stockholm University
Contributors: Sinkko, H., Hepolehto, I., Lyra, C., Rinta-Kanto, J. M., Villnäs, A., Norkko, A., Timonen, S.
Publication date: 8 Nov 2019
Peer-reviewed: Yes

Publication information

Journal: Scientific Reports
Volume: 9
Article number: 16341
ISSN (Print): 2045-2322
Ratings: 
  • Scopus rating (2019): CiteScore 7.2 SJR 1.341 SNIP 1.365
Original language: English
Keywords: microbial ecology, water microbiology
Electronic versions: 

Research output: Contribution to journalArticleScientificpeer-review

Indigenous practices of water management for sustainable services: Case of Borana and Konso, Ethiopia

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Behailu, B. M., Pietilä, P. E., Katko, T. S.
Number of pages: 11
Pages: 1-11
Publication date: 6 Dec 2016
Peer-reviewed: Yes

Publication information

Journal: SAGE OPEN
Volume: 6
Issue number: 4
ISSN (Print): 2158-2440
Ratings: 
  • Scopus rating (2016): CiteScore 0.7 SJR 0.219 SNIP 0.536
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Influence of atmospheric plasma treatment on surface properties and inkjet printability of plastic packaging film

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Lahti, J., Eiroma, K., Tenhunen, T., Pykönen, M., Toivakka, M.
Number of pages: 7
Pages: 1-7
Publication date: 2010

Host publication information

Title of host publication: Iarigai 2010 Montreal, Advances in Printing and Media Technology, Montreal, Canada, September 12-15, 2010

Bibliographical note

Contribution: organisation=epr pap,FACT1=1

Source: researchoutputwizard
Source ID: 8548

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Influence of Diffusion Barriers on Thermal Ageing Behaviour of Solar Absorber Coatings on Copper

The thermal stability of magnetron sputtered and electroplated solar absorber coatings were investigated at elevated temperatures of 200-500°C. Diffusion barriers of aluminium and nickel were studied towards thermal diffusion of copper substrate atoms.

The diffusion barriers studied were experimental magnetron sputtered Al layers and an industrial electroplated Ni layer between a Cu substrate and an absorber coating. The thicknesses of Al barriers were 0.1 µm and 0.5 µm, and a Ni barrier was 3 µm thick. As absorber coatings, magnetron sputtered chromium-based coatings and industrially electroplated black chromium coatings, were studied. The sputtered absorbers were a 3-layer stack of CrOx/Cr/CrOx with layer thicknesses of 0.05/0.03/0.05 µm, respectively. The electroplated black chromium coating had a thickness of 0.2 µm. Copper was used as a substrate for all of the absorbers studied.

The degradation of the absorber surfaces and influence of diffusion barriers were analysed by optical measurements (solar absorptance with a UV/Vis/NIR spectrophotometer and thermal emittance with a FTIR spectrophotometer), microstructural analyses were performed using a field-emission scanning electron microscope (FESEM). The absorbers were aged by means of heat treatments in a circulating air furnace at 200, 300, 400 and 500°C for two hours. The experimental analyses were performed before and after the ageing studies.

The results showed that without a barrier coating copper substrate atoms can diffuse into the absorber coating and through the coating to the surface of the coating and form CuO islands on the surface. These phenomena degraded optical selectivity of the absorber surface. The diffusion can be prevented or retarded with a diffusion barrier layer between the Cu substrate and the absorber coating. The 3-µm-thick Ni barrier prevented Cu diffusion and retained optical selectivity up to 500°C for two hours and the 0.5-µm-thick Al layer up to 400°C.

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Materials Science, Research group: Surface Engineering
Contributors: Kotilainen, M., Vuoristo, P.
Number of pages: 11
Pages: 481-491
Publication date: 2015

Host publication information

Title of host publication: Surface Modification Technologies XXVIII : Tampere University of Technology Tampere, Finland June 16-18, 2014
ISBN (Print): 978-81-926196-1-3
Keywords: Thermal ageing, Thin films, Absorber coating, Aluminium barrier, Copper substrate, Diffusion barrier, Magnetron sputtering, Stability

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Influence of temperature and pretreatments on the anaerobic digestion of wastewater grown microalgae in a laboratory-scale accumulating-volume reactor

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Kinnunen, V., Craggs, R., Rintala, J.
Number of pages: 11
Pages: 247-257
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Water Research
Volume: 57
Ratings: 
  • Scopus rating (2014): CiteScore 9.7 SJR 2.946 SNIP 2.688
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-05-06<br/>Publisher name: I W A Publishing; Water Quality Association

Source: researchoutputwizard
Source ID: 726

Research output: Contribution to journalArticleScientificpeer-review

Influence of TiO2 compact layer precursor on the performance of perovskite solar cells

The optimization of the hole-blocking layer in perovskite solar cells (PSC), typically based on TiO2, is crucial, as it strongly affects the device performance. In this work, we thoroughly characterize the thickness, roughness, and crystal structure of a set of TiO2 compact layers produced by spin coating of different precursor sols and correlate the choice of the TiO2 precursor to the photovoltaic performance of the PSC. By replacing the commonly used titanium isopropoxide (TTIP) blocking layer precursor with titanium tetrachloride (TiCl4), a clear enhancement in the PSC performance was observed, particularly in the hysteresis behavior and stability. The results from the morphological/structural analysis and transient photoluminescence studies clarify the different behavior of the compact layers in PSCs.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Supramolecular photochemistry, Åbo Akademi, Aalto University, VTT
Contributors: Vivo, P., Ojanperä, A., Smått, J., Sánden, S., Hashmi, S. G., Kaunisto, K., Ihalainen, P., Masood, M. T., Österbacka, R., Lund, P. D., Lemmetyinen, H.
Pages: 287-293
Publication date: 2017
Peer-reviewed: Yes
Early online date: 17 Nov 2016

Publication information

Journal: Organic Electronics
Volume: 41
ISSN (Print): 1566-1199
Ratings: 
  • Scopus rating (2017): CiteScore 6 SJR 1.085 SNIP 0.884
Original language: English

Bibliographical note

EXT="Kaunisto, Kimmo"

Research output: Contribution to journalArticleScientificpeer-review

Inhibitory effects of substrate and soluble end products on biohydrogen production of the alkalithermophile Caloramator celer: Kinetic, metabolic and transcription analyses

In this study the tolerance of the alkalithermophile Caloramator celer towards substrate (glucose) and soluble end product (acetate, formate and ethanol) inhibition was assessed employing nonlinear inhibition models. In addition, the effects of subinhibitory concentrations of end products on fermentative metabolism and regulation of 12 key genes involved in pyruvate catabolism were studied. Optimal growth and H2 production were found at 50 mM of glucose and the critical substrate concentration was observed at 290-360 mM. Two inhibition models revealed that ethanol had a higher inhibitory effect on growth rate, whereas H2 production kinetics was more sensitive towards increasing concentrations of acetate and formate. Acetate, the main soluble metabolite of the fermentation, inhibited the H2 production by increasing the ionic strength in the medium. Subinhibitory concentrations of soluble end products induced changes in the metabolite profile of C. celer, specifically exogenous acetate (80 mM) and ethanol (40 mM) slightly increased the H2 yield by 4 and 7%, respectively. However, despite the observed metabolic shifts, gene regulation was minimal and not always in agreement with the measured product yields. Overall, the results suggest that further optimization of the H2 production process from C. celer should focus on methods to evolve adapted osmotolerant strains and/or remove soluble metabolites, especially acetate, from the culture. Copyright © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Urban circular bioeconomy (UrCirBio)
Contributors: Ciranna, A., Ferrari, R., Santala, V., Karp, M.
Number of pages: 11
Pages: 6391-6401
Publication date: 15 Apr 2014
Peer-reviewed: Yes

Publication information

Journal: International Journal of Hydrogen Energy
Volume: 39
Issue number: 12
ISSN (Print): 0360-3199
Ratings: 
  • Scopus rating (2014): CiteScore 5.6 SJR 1.207 SNIP 1.488
Original language: English
ASJC Scopus subject areas: Renewable Energy, Sustainability and the Environment, Fuel Technology, Condensed Matter Physics, Energy Engineering and Power Technology
Keywords: Acetate, Dark fermentation, End product inhibition, Gene expression, Kinetic model, Substrate inhibition

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-04-29<br/>Publisher name: Elsevier Ltd; International Association for Hydrogen Energy

Source: researchoutputwizard
Source ID: 235

Research output: Contribution to journalArticleScientificpeer-review

Innovative use of recovered municipal solid waste incineration bottom ash as a component in growing media

The utilisation of municipal solid waste incineration bottom ash has been extensively studied, for example, in the unbound layers of roads and the products of cement and concrete industry. On the other hand, less attention has been given to other innovative utilisation possibilities, such as using the municipal solid waste incineration bottom ash as a component in growing media of plants. The municipal solid waste incineration bottom ash contains useful substances, such as calcium, that can influence plant growth in a positive manner. Therefore, the utilisation of this waste-derived material in the growing media may substitute the use of commercial fertilisers. Since the municipal solid waste incineration bottom ash also contains hazardous substances that can be toxic to plants, the main aim of this study was to add different amounts of recovered municipal solid waste incineration bottom ash in the growing media and to evaluate the effect of this material on plant growth. Based on the obtained results, the concentration of, for example copper and zinc, increased in test plants; ryegrass and barley, when recovered municipal solid waste incineration bottom ash was added in their growing media. On the other hand, this did not have a significant effect on plant growth, if compared with the growth of plants in commercially produced growing medium. Furthermore, the replacement of natural sand with municipal solid waste incineration bottom ash had a positive liming effect in the growing media. Overall, these findings suggest that the utilisation of recovered municipal solid waste incineration bottom ash as a component in growing media is possible and, thus, may allow more widespread and innovative use of this waste-derived material.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Suomen Erityisjäte Oy
Contributors: Sormunen, A., Kanniainen, T., Salo, T., Rantsi, R.
Pages: 595-604
Publication date: 1 Jul 2016
Peer-reviewed: Yes

Publication information

Journal: Waste Management and Research
Volume: 34
Issue number: 7
ISSN (Print): 0734-242X
Ratings: 
  • Scopus rating (2016): CiteScore 2.8 SJR 0.673 SNIP 1.081
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Insentiivit julkisen sektorin innovaatiotoiminnan edistämisen välineinä. Esimerkkinä Georgian osavaltion palvelu-uudistus

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Anttiroiko, A., Heino, O.
Number of pages: 8
Pages: 298-305
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Työelämän tutkimus
Volume: 10
Issue number: 3
ISSN (Print): 0788-091X
Original language: Finnish

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-07-29

Source: researchoutputwizard
Source ID: 3857

Research output: Contribution to journalArticleScientificpeer-review

Institutional development is the key for sustainable water services in the built environment

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Civil Engineering
Contributors: Katko, T. S., Hukka, J. J.
Number of pages: 12
Pages: 419-430
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the CIB World Building Congress 2016 : Volume IV - Understanding impacts and functioning of different solutions
Place of publication: Tampere
Publisher: Tampere University of Technology. Department of Civil Engineering
Editors: Nenonen, S., Junnonen, J.
ISBN (Print): 978-952-15-3744-8

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Integration of water and wastewater utilities

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Katko, T. S., Kurki, V. O., Juuti, P. S., Rajala, R. P., Seppälä, O. T.
Pages: 62-70
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Journal American Water Works Association
Volume: 102
Issue number: 9
ISSN (Print): 0003-150X
Ratings: 
  • Scopus rating (2010): SJR 0.429 SNIP 0.773
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8314

Research output: Contribution to journalArticleScientificpeer-review

Integration of water and wastewater utilities

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Katko, T. S., Kurki, V. O., Juuti, P. S., Rajala, R. P., Seppälä, O. T.
Number of pages: 12
Pages: 29-40
Publication date: 2013

Host publication information

Title of host publication: Water Services Management and Governance : Lessons for a Sustainable Future
Publisher: IWA Publishing
Editors: Katko, T. S., Juuti, P. S., Schwartz, K., Rajala, R. P.
ISBN (Print): 978-1-78040-022-8
ISBN (Electronic): 978-1-78040-073-0

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-09-29

Source: researchoutputwizard
Source ID: 2524

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Introduction: Evolution and futures of water management: strategic decisions, challenges and effectiveness

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Juuti, P. S., Katko, T. S., Rajala, R. P.
Pages: 6-20
Publication date: 2008

Host publication information

Title of host publication: Water: a Matter of Life - Long-term strategic thinking in water services. 193 p. KehräMedia Inc
Editors: Juuti P.S., K. T. S., Rajala, R.

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 12417

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Inverse infrastructures: self-organization in the water services

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O., Anttiroiko, A.
Number of pages: 17
Pages: 299-315
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Water Policy
ISSN (Print): 1366-7017
Ratings: 
  • Scopus rating (2014): CiteScore 1.8 SJR 0.46 SNIP 0.771
Original language: English

Bibliographical note

siirretään 2015 : Water Policy In Press, Uncorrected Proof © IWA Publishing 2014 doi:10.2166/wp.2014.095<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2015-01-15

Source: researchoutputwizard
Source ID: 439

Research output: Contribution to journalArticleScientificpeer-review

Ja alussa oli vesi

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Civil Engineering, University of Tampere
Contributors: Juuti, P., Rajala, R.
Pages: 15-18
Publication date: 2011

Host publication information

Title of host publication: Vinttikaivosta vesiyhtiöön
Place of publication: Saarijärvi
Publisher: TamPub
Editors: Juuti, P., Rajala, R.
ISBN (Print): 978-952-92-8428-3
ISBN (Electronic): 978-951-44-8409-4

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Jätehuollon jakautuminen osamarkkinoihin ja yritystoiminta

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Kallio, O., Valkama, P., Siitonen, P., Heino, O.
Number of pages: 15
Pages: 99-113
Publication date: 2013

Host publication information

Title of host publication: Markkinainnovaatiot yhdyskuntajätehuollossa : tutkimus jätehuoltopalvelujen markkinoiden evoluutiosta, sovelluksista ja jännitteistä kunnallisen ja yksityisen sektorin rajapinnassa
Place of publication: Tampere
Publisher: Tampereen yliopisto, Johtamiskorkeakoulu
Editor: Valkama, P.
ISBN (Print): 978-951-44-9163-4
ISBN (Electronic): 978-951-44-9164-1

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-07-29

Source: researchoutputwizard
Source ID: 2475

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Jätehuollon, -politiikan ja -lainsäädännön institutionaalinen kuvaus

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O., Kallio, O., Valkama, P., Siitonen, P.
Number of pages: 18
Pages: 33-50
Publication date: 2013

Host publication information

Title of host publication: Markkinainnovaatiot yhdyskuntajätehuollossa : tutkimus jätehuoltopalvelujen markkinoiden evoluutiosta, sovelluksista ja jännitteistä kunnallisen ja yksityisen sektorin rajapinnassa
Place of publication: Tampere
Publisher: Tampereen yliopisto, Johtamiskorkeakoulu
Editor: Valkama, P.
ISBN (Print): 978-951-44-9163-4
ISBN (Electronic): 978-951-44-9164-1

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-07-29

Source: researchoutputwizard
Source ID: 2273

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Jätehuollon tekniset vaihtoehdot

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O.
Number of pages: 24
Pages: 51-74
Publication date: 2013

Host publication information

Title of host publication: Markkinainnovaatiot yhdyskuntajätehuollossa : tutkimus jätehuoltopalvelujen markkinoiden evoluutiosta, sovelluksista ja jännitteistä kunnallisen ja yksityisen sektorin rajapinnassa
Place of publication: Tampere
Publisher: Tampereen yliopisto, Johtamiskorkeakoulu
Editor: Valkama, P.
ISBN (Print): 978-951-44-9163-4
ISBN (Electronic): 978-951-44-9164-1

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-07-29

Source: researchoutputwizard
Source ID: 2269

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Jätevedenpuhdistuksen ja viemäröinnin vaiheita Helsingissä

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Civil Engineering, University of Tampere
Contributors: Juuti, P., Rajala, R.
Pages: 36-90
Publication date: 2010

Host publication information

Title of host publication: Metropoli ja meri - 100 vuotta jätevedenpuhdistusta Helsingissä
Publisher: TamPub
Editors: Juuti, P., Rajala, R., Katko, T.

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Johdanto: vesirikas Riihimäki

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Research group: Industrial Bioengineering and Applied Organic Chemistry, Department of Civil Engineering, University of Tampere
Contributors: Juuti, P., Pietilä, P., Rajala, R.
Pages: 26-33
Publication date: 2010

Host publication information

Title of host publication:  Hyvän veden ja hyvien yhteyksien kaupunki : Riihimäen Veden historia
Publisher: TamPub
Editors: Juuti, P., Rajala, R., Pietilä, P., Katko, T.
ISBN (Print): 978-952-5571-29-5
ISBN (Electronic): 978-951-44-8136-9

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

Johtoja ja joukkuehenkeä

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O.
Number of pages: 3
Pages: 11-13
Publication date: 2013
Peer-reviewed: Unknown

Publication information

Journal: Vesitalous
Issue number: 3
ISSN (Print): 0505-3838
Original language: Finnish

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-07-29

Source: researchoutputwizard
Source ID: 2270

Research output: Contribution to journalArticleProfessional

Joukkoliikenteellä on tärkeä rooli liikenteen päästöjen vähentämisessä

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Civil Engineering, Research group: Transport Research Centre Verne, Suomen ympäristökeskus SYKE - Finnish Environment Institute