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

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

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

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

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

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

Operationalising the right to water and sanitation and gender equality via appropriate technology in rural Nepal

Can a tap, a squat toilet, or an improved cooking stove – all simple rural technologies – make a contribution to achieving human rights and the Sustainable Development Goals (SDGs)? What are the ‘soft’ elements, beyond the technology, that are needed? This article explores how, the principles of human rights based approach (HRBA), gender equality and social inclusion (GESI) are mainstreamed and operationalized through two bilateral rural water projects in Nepal - the Finland and Nepal-funded Rural Water Supply and Sanitation Project in Western Nepal (RWSSP-WN) and the Rural Village Water Resources Management Project (RVWRMP). The projects utilise a combination of hands-on technical assistance, community participation and appropriate technologies to achieve the Right to Water and Sanitation, as well as making a contribution to the SDGs. The technologies include water supply systems; renewable energy, including micro-hydropower schemes, improved cooking stoves, improved water mills and hydraulic ram pumps; as well as water seal toilets. However, simply providing technology is not enough. It is critical that it is applied within a strong planning and implementation framework, integrated in local government and communities, but supported with skilful facilitation. This case study focuses on the results achieved and critical lessons learned regarding gender equality and empowerment (SDG 5), and access to water and sanitation (SDG 6). The lessons learned, including the important role of the technical staff in the project modality, are valuable for planners and implementers of water and sanitation projects elsewhere.

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Civil Engineering
Contributors: White, P., Rautanen, S., Nepal, P. R.
Number of pages: 23
Pages: 217-239
Publication date: 1 Mar 2017

Host publication information

Title of host publication: Human Rights and Technology
Place of publication: Costa Rica
Publisher: University of Peace, Costa Rica
Editor: Garrido Villareal, M.
ISBN (Electronic): 978-9930-542-00-2
Keywords: 214 Mechanical engineering, Water and Sanitation, 5203 Development Studies, Human Rights, Gender, Nepal, Social Inclusion
Source: Bibtex
Source ID: urn:de56f6bb4591a0c82a8d620136c3fd9c

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

Ministry of the Environment announces a Guide on Renovation and Repair of Buildings with Moisture and Microbial Damage - From theory to practice

In 2015, the Ministry of the Environment in Finland renewed the legislation and the National Building Code of Finland. It released completely new legislation concerning repair design. This was due to widely known issues relating to the indoor air quality of private and public buildings. In the autumn of 2019, the Ministry of the Environment in Finland published a guide concerning the repairs of moisture and microbial damage. It is available in Finnish and Swedish. This guide is a follow-up of the Environmental Guide "Building Moisture and Indoor Air Quality Assessment", published 2016. It completes the series of guides for the execution of a project repairing indoor air quality issues, from a condition assessment to the completion of repairs and the implementation of the building. These guides lead through common practices and how these issues shall be dealt with in Finland.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Service Life Engineering of Structures, Ramboll Finland Ltd., Aalto University
Contributors: Weijo, I., Turunen, T., Lahdensivu, J., Sistonen, E., Annila, P.
Number of pages: 6
Publication date: 30 Jun 2020
Peer-reviewed: Yes

Publication information

Journal: E3S Web of Conferences
Volume: 172
Article number: 20007
ISSN (Print): 2555-0403
Original language: English
ASJC Scopus subject areas: Environmental Science(all), Energy(all), Earth and Planetary Sciences(all)
Electronic versions: 

Bibliographical note

EXT="Weijo, Inari"

Source: Scopus
Source ID: 85088468858

Research output: Contribution to journalConference articleScientificpeer-review

Vapor phase processing of α-Fe2O3 photoelectrodes for water splitting: An insight into the structure/property interplay

Harvesting radiant energy to trigger water photoelectrolysis and produce clean hydrogen is receiving increasing attention in the search of alternative energy resources. In this regard, hematite (alpha-Fe2O3) nanostructures with controlled nano-organization have been fabricated and investigated for use as anodes in photoelectrochemical (PEC) cells. The target systems have been grown on conductive substrates by plasma enhanced-chemical vapor deposition (PE-CVD) and subjected to eventual ex situ annealing in air to further tailor their structure and properties. A detailed multitechnique approach has enabled to elucidate between system characteristics and the generated photocurrent. The present alpha-Fe2O3 systems are characterized by a high purity and hierarchical morphologies consisting of nanopyramids/organized dendrites, offering a high contact area with the electrolyte. PEC data reveal a dramatic response enhancement upon thermal treatment, related to a more efficient electron transfer. The reasons underlying such a phenomenon are elucidated and discussed by transient absorption spectroscopy (TAS) studies of photogenerated charge carrier kinetics, investigated on different time scales for the first time on PE-CVD Fe2O3 nanostructures.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Supramolecular photochemistry, Univ Brescia, University of Brescia, Chem Technol Lab, Department of Physics and Astronomy, University of Turku, Univ Antwerp, University of Antwerp, EMAT, Padova University and INSTM, CNR-IENI, Chemistry for Technologies Laboratory, Padova University
Contributors: Warwick, M. E. A., Kaunisto, K., Barreca, D., Carraro, G., Gasparotto, A., Maccato, C., Bontempi, E., Sada, C., Ruoko, T., Turner, S., Van Tendeloo, G.
Number of pages: 10
Pages: 8667-8676
Publication date: 2015
Peer-reviewed: Yes
Early online date: 15 Apr 2015

Publication information

Journal: ACS Applied Materials and Interfaces
Volume: 7
Issue number: 16
ISSN (Print): 1944-8244
Ratings: 
  • Scopus rating (2015): CiteScore 8.4 SJR 2.262 SNIP 1.548
Original language: English
ASJC Scopus subject areas: Materials Science(all)
Keywords: hematite, hierarchical structures, PE-CVD, PEC, transient absorption spectroscopy, water splitting
Electronic versions: 
Source: WOS
Source ID: 000353931300037

Research output: Contribution to journalArticleScientificpeer-review

Pt-functionalized Fe2O3 photoanodes for solar water splitting: the role of hematite nano-organization and the platinum redox state

Pt/alpha-Fe2O3 nanocomposites were synthesized on fluorine-doped tin oxide (FTO) substrates by a sequential plasma enhanced-chemical vapor deposition (PE-CVD)/radio frequency (RF) sputtering approach, tailoring the overall Pt content as a function of sputtering time. The chemico-physical properties of the as-prepared systems were extensively investigated by means of complementary techniques, including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission-scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDXS), secondary ion mass spectrometry (SIMS), and optical absorption spectroscopy, and compared to those of the homologous Pt/alpha-Fe2O3 systems annealed in air prior and/or after sputtering. The obtained results evidenced that the material compositional, structural and morphological features, with particular regard to the Pt oxidation state and hematite nano-organization, could be finely tailored as a function of the adopted processing conditions. Pt/alpha-Fe2O3 systems were finally tested as photoanodes in photoelectrochemical (PEC) water splitting experiments, evidencing a remarkable interplay between functional performances and the above-mentioned material properties, as also testified by transient absorption spectroscopy (TAS) results.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Supramolecular photochemistry, Univ Padua, University of Padua, Dept Chem, INSTM, Univ Padua, University of Padua, Dept Chem, CNR IENI, Univ Brescia, University of Brescia, Chem Technol Lab, Univ Padua, University of Padua, Dept Phys & Astron, Univ Padua, University of Padua, INSTM, Dept Chem, Univ Cologne, University of Cologne, Dept Chem, Chair Inorgan & Mat Chem
Contributors: Warwick, M. E. A., Barreca, D., Bontempi, E., Carraro, G., Gasparotto, A., Maccato, C., Kaunisto, K., Ruoko, T. -., Lemmetyinen, H., Sada, C., Goenuellue, Y., Mathur, S.
Number of pages: 9
Pages: 12899-12907
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Physical Chemistry Chemical Physics
Volume: 17
Issue number: 19
ISSN (Print): 1463-9076
Ratings: 
  • Scopus rating (2015): CiteScore 6.6 SJR 1.725 SNIP 1.188
Original language: English
Keywords: ALPHA-FE2O3 THIN-FILMS, PHOTOELECTROCHEMICAL PERFORMANCE, NANOSTRUCTURED ALPHA-FE2O3, HYDROTHERMAL METHOD, WATER OXIDATION
Electronic versions: 
Source: WOS
Source ID: 000354195300053

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

Safety of lead water pipes: history and present

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: Vuorinen, H. S., Juuti, P. S., Katko, T. S.
Number of pages: 7
Pages: 89-96
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: 3724

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

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

Näkökulma: Maltti on valttia Suomellekin nollaenergiatavoitteita asetettaessa

General information

Publication status: Published
MoE publication type: E1 Popularised article, newspaper article
Organisations: Department of Civil Engineering, Research group: Building Physics
Contributors: Vinha, J.
Publication date: 13 Feb 2015
Peer-reviewed: Unknown

Publication information

Journal: Rakennuslehti
Issue number: 6
Original language: Finnish

Research output: Contribution to journalArticleGeneral public

The students' feedback on WWW-course "Electricity, Electronics and Environment"

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Vesapuisto, M., Vekara, T., Korpinen, L., Koskiranta, M., Lehtelä, R.
Number of pages: 4
Pages: 99-102
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Elektronika ir Elektrotechnika
Volume: 102
Issue number: 6
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: 9548

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

Parameters Affecting the Upcycling of Waste Cotton and PES/CO Textiles

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Materials Science, Research group: Fibre Materials
Contributors: Vats, S., Rissanen, M.
Number of pages: 12
Pages: 166-177
Publication date: 30 May 2016
Peer-reviewed: Yes

Publication information

Journal: Recycling
Volume: 1
Issue number: 1
ISSN (Print): 2313-4321
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Päätelmät yhdyskuntajätehuollon markkinainnovaatioista - taustat, kiistat ja sovellukset

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Valkama, P., Heino, O., Kallio, O.
Number of pages: 12
Pages: 159-170
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: 3634

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

Tutkimuksen teoreettinen viitekehys

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Valkama, P., Kallio, O., Heino, O.
Number of pages: 17
Pages: 16-32
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: 3636

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

Kylien palvelutuotantoedellytyksistä erityisesti julkisten palvelujen näkökulmasta tarkasteltuna

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Chemistry and Bioengineering
Contributors: Valkama, P., Heino, O., Salonen, A., Laukka, A.
Number of pages: 9
Publication date: 2013

Publication information

Place of publication: Tampere
Publisher: Maaseutupolitiikan yhteistyöryhmä, YTR
ISBN (Print): 978-952-227-782-4
ISBN (Electronic): 978-952-227-783-1
Original language: Finnish

Publication series

Name: Maaseutupolitiikan yhteistyöryhmän julkaisuja
Publisher: Maaseutupolitiikan yhteistyöryhmä, YTR
No.: 6
ISSN (Print): 1238-6464

Bibliographical note

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

Source: researchoutputwizard
Source ID: 3635

Research output: Book/ReportCommissioned reportProfessional

Metering the quality of water supply and sewage network maintenance services

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Chemistry and Bioengineering
Contributors: Välisalo, T., Heino, O., Luomanen, T.
Number of pages: 9
Pages: 1-9
Publication date: 2012

Host publication information

Title of host publication: 2012 IFME World Congress on Municipal Engineering. Sustainable Communities, June 4-10, Helsinki, Finland
Publisher: International Federation of Municipal Engineering IFME
ISBN (Print): 978-951-758-541-5

Publication series

Name: International Federation of Municipal Engineering World Congress
ISSN (Print): 0356-9403

Bibliographical note

ei ut-numeroa 21.9.2013<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-07-29<br/>Publisher name: International Federation of Municipal Engineering IFME

Source: researchoutputwizard
Source ID: 5492

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

Municipal challenges in managing a building with noted health symptoms

Purpose

This study aims to present property management challenges that municipalities have encountered regarding a public building with noted building-related symptoms. The study goes on to provide reasons for the failure of attempts to manage the symptoms and discusses the current challenges concerning the process.

Design/methodology/approach

A participatory case study was used as the research methodology to identify the current challenges concerning a municipal approach to managing the building-related symptoms in a case-study building. The researchers scrutinised the history of the health symptom management process and attended the project planning meetings focused on the investigation of the condition of the building.

Findings

Multiple challenges concerning maintenance and omitted or postponed repair actions, as well as vagueness in the management process were found. In addition to this, it was noted that the complexity of the initial design of the building and vandalism have resulted in challenges for the maintenance and moisture performance of the building structures. According to the study, more orderliness and a more systematic process is needed when managing a municipal property.

Practical implications

The identified property management challenges may be of practical value for the facility managers and the property owners, especially when managing the building-related symptoms and a damaged building.

Originality/value

This study highlights the importance of having an in-depth understanding of condition assessments as well as proper maintenance and timely repairs for the successful management of the building-related symptoms in a municipal building. This is a pilot project in a larger project of management of building refurbishment.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Responsible Construction
Contributors: Uotila, U., Saari, A., Junnonen, J.
Number of pages: 13
Publication date: Nov 2019
Peer-reviewed: Yes

Publication information

Journal: Facilities
ISSN (Print): 0263-2772
Ratings: 
  • Scopus rating (2019): CiteScore 2.1 SJR 0.399 SNIP 0.933
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Utilizing Gelatinized Starchy Waste from Rice Noodle Factory as Substrate for L(+)-Lactic Acid Production by Amylolytic Lactic Acid Bacterium Enterococcus faecium K-1

To valorize starchy waste from rice noodle factory, bioconversion of gelatinized starchy waste (GSW) to value-added product as L(+)-lactic acid, the monomer for polylactate synthesis, was investigated using amylolytic lactic acid bacterium, Enterococcus faecium K-1. Screening for appropriate nitrogen source to replace expensive organic nitrogen sources revealed that corn steep liquor (CSL) was the most suitable regarding high efficacy for L(+)-LA achievement and low-cost property. The successful applying statistic experimental design, Plackett-Burman design incorporated with central composite design (CCD), predicted the maximum L(+)-LA of 93.07 g/L from the optimized medium (OM) containing 125.7 g/L GSW and 207.3 g/L CSL supplemented with CH3COONa, MgSO4, MnSO4, K2HPO4, CaCl2, (NH4)2HC6H5O7, and Tween80. Minimizing the medium cost by removal of all inorganic salts and Tween80 from OM was not an effect on L(+)-LA yield. Fermentation using the optimized medium without minerals (OM-Mi) containing only GSW (125.7 g/L) and CSL (207.3 g/L) in a 10-L fermenter was also successful. Thinning GSW with α-amylase from Lactobacillus plantarum S21 increased L(+)-LA productivity in the early stage of 24-h fermentation. Not only showing the feasible bioconversion process for GSW utilizing as a substrate for L(+)-LA production, this research also demonstrated the efficient model for industrial starchy waste valorization.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Chiang Mai University, North Dakota State University
Contributors: Unban, K., Khanongnuch, R., Kanpiengjai, A., Shetty, K., Khanongnuch, C.
Publication date: May 2020
Peer-reviewed: Yes

Publication information

Journal: Applied Biochemistry and Biotechnology
ISSN (Print): 0273-2289
Original language: English
ASJC Scopus subject areas: Biotechnology, Bioengineering, Biochemistry, Applied Microbiology and Biotechnology, Molecular Biology
Keywords: ALAB, Enterococcus faecium, L-lactic acid, Low-cost medium, Starchy waste
Source: Scopus
Source ID: 85084316077

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

UV irradiation for Micropollutant removal from aqueous solution in the presence of H2O2

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Department of Chemistry and Bioengineering
Contributors: Tuhkanen, T. A., Cajal Marinosa, P.
Pages: 295-320
Publication date: 2010

Host publication information

Title of host publication: Treatment of Micropollutants in Water and Wastewater. Integrated Environmental Technology Series
Editors: Virkutyte, J., Varma, R., Jegatheesan, V.
ISBN (Print): 1843393166

Bibliographical note

Contribution: organisation=keb kem,FACT1=1

Source: researchoutputwizard
Source ID: 9423

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

L´oxydation chimique pour la remediation des sols contamines par des composes recalcitrants. Cas de la chlordecone

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Department of Chemistry and Bioengineering
Contributors: Tuhkanen, T.
Pages: 8-11
Publication date: 2011

Host publication information

Title of host publication: Remediation a la pollution par la chlordecone aux Antilles, No 9-10, Avril 2011
Publisher: Le Lamentin

Publication series

Name: Les Cahiers du PRAM
ISSN (Print): 1638-3974

Bibliographical note

Chapter in a book + oral presentation<br/>Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: Le Lamentin

Source: researchoutputwizard
Source ID: 7404

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

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

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

The factors controlling combustion and gasification kinetics of solid fuels

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Energy and Process Engineering
Contributors: Tolvanen, H., Kokko, L., Raiko, R.
Number of pages: 14
Pages: 1-14
Publication date: 2011

Host publication information

Title of host publication: Swedish-Finnish Flame Days, "Challenges in Combustion Technology today", January 26-27, 2011, Sweden
Place of publication: Piteå
Publisher: IFRF and the Scandinavian-Nordic Section of the Combustion Institute

Publication series

Name: Swedish-Finnish Flame Days
Publisher: IFRF and the Scandinavian-Nordic Section of the Combustion Institute

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 7395

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

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

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

Unsteady computational methods to study jet behaviour in large fluidized bed boiler

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Energy and Process Engineering
Contributors: Tiitinen, K., Ylitalo, M., Oksanen, A.
Number of pages: 22
Pages: 1-22
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: 9404

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

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

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

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

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

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

Use of factorial experimental design to study the effects of iron and sulfur on growth of Scenedesmus acuminatus with different nitrogen sources

The aim of this study was to determine the combined effects of iron and sulfur on microalgal biomass concentration and removal efficiency of nitrogenous compounds using factorial design. Scenedesmus acuminatus (currently accepted name Tetradesmus lagerheimii) was separately cultivated in batch photobioreactors using modified N-8 media with two nitrogen sources, nitrate, and ammonium. To study the interaction effect between iron and sulfur and to reduce the total number of experimentally studied combinations, a factorial design was used. Three iron (0.1, 1, and 1.9 mg L−1) and three sulfur concentrations (3.7, 20, and 35.8 mg L−1) were employed to the modified N-8 media in this study. The results show that the final microalgal biomass concentration and nitrogen removal efficiency were more sensitive to the changes in iron and sulfur concentrations in the media with nitrate than with ammonium possibly because of the different assimilation mechanisms used by microalgae for these two nitrogen sources. The created models demonstrated that iron had a statistically significant effect on the microalgal biomass concentration and nitrate removal efficiency while sulfur did not. In addition, the interaction effect between iron and sulfur was not significant on microalgal biomass concentration and nitrogen removal. In synthetic medium with nitrate as nitrogen source, the highest microalgal biomass concentration was obtained with 1.0 mg L−1 iron and 35.8 mg L−1 sulfur.

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, University of South Florida Tampa, Université de Paris-Sud, UNESCO-IHE Institute for Water Education, Delft, Hydraulic and Environmental Engineering (IHE) Inst. for Water Education
Contributors: Tao, R., Bair, R., Lakaniemi, A. M., van Hullebusch, E. D., Rintala, J. A.
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: Journal of Applied Phycology
ISSN (Print): 0921-8971
Ratings: 
  • Scopus rating (2019): CiteScore 5.1 SJR 0.89 SNIP 1.198
Original language: English
ASJC Scopus subject areas: Aquatic Science, Plant Science
Keywords: Chlorophyceae, Factorial experimental design, Iron, Microalgal growth, Nitrogen removal, Sulfur
Source: Scopus
Source ID: 85074596640

Research output: Contribution to journalArticleScientificpeer-review

Nutrient and organic matter removal from wastewaters with microalgae

Use of microalgae in wastewater treatment has been increasingly studied to integrate with or replace the present treatment systems for removal of nutrients and other pollutants. The potential advantages of this integration (wastewater treatment and microalgal cultivation) could be simultaneous recovery of nitrogen and phosphorus and the use of produced microalgal biomass as feedstock for e.g. biofuel, fertilizer and/or energy. However, the use of microalgae in wastewater treatment is mainly in research stage due to e.g. low nutrient removal and microalgal biomass growth. The aim of this thesis was to enable efficient nutrient and organic matter removal from wastewaters by microalgae while promoting microalgal biomass production. Chlorella vulgaris and Scenedesmus acuminatus were successfully grown in batch photobioreactors with liquid digestates from anaerobic digestion (AD) of biosludge from a municipal wastewater treatment plant (ADMW) and a pulp and paper mill wastewater treatment plant (ADPP). The final ammonium removal efficiencies were above 97% when cultivating both microalgae separately in ADPP, however, only 24% and 44% of ammonium were removed from ADMW by C. vulgaris and S. acuminatus, respectively. Both microalgae efficiently removed phosphate (>96%), while color (74–80%) and soluble COD (27–39%) were partially removed from ADMW and ADPP. The obtained highest S. acuminatus biomass concentration (7.8–10.8 g L-1 VSS) in ADPP is among the highest yields reported for microalgae in real wastewaters. Higher S. acuminatus biomass yields were obtained in thermophilic ADPP (without and with pretreatment prior to AD: 10.2±2.2 and 10.8±1.2 g L-1, respectively) than in pretreated mesophilic ADPP (7.8±0.3 g L-1). In addition, the highest microalgal biomass concentration and methane yields were obtained in the same integrated AD and microalgal culti- vation system (thermophilic AD with pretreatment). The iron (0.1, 1.0, and 1.9 mg L-1) and sulfate-sulfur (3.7, 20, and 35.8 mg L-1) concentrations were found to affect nitrogen removal efficiency and microalgal biomass concentration more in the media with nitrate than with ammonium, probably due to different microalgal assimilation mechanisms for nitrate and ammonium. In this study, synthetic medium with nitrate as nitrogen source with 1.0 mg L-1 iron and 35.8 mg L-1 sulfate-sulfur enabled the highest microalgal biomass concentration. The effect of iron concentration on nitrate removal efficiency and microalgal growth was more significant than that of sulfate concentration, while the interaction effect between sulfate and iron was not observed. The average ammonium removal efficiency (14 to 30%) and microalgal biomass concentration (0.50 to 1.17 g particulate organic carbon per L) in continuous-flow membrane photobioreactor were promoted by adding a low concentration of zeolite (0.5 g L-1). The zeolite likely provided a habitat for attached growth of microalgae and high availability of ammonium for growth on the surface of the zeolite due to ammonium adsorption to zeolite. Further increase in zeolite concentration (from 0.5 to 1 and 5 g L-1) did not improve ammonium removal efficiency or biomass concentration. This was likely due to the increased solution turbidity caused by breaking apart of added zeolite particles into finer particles, which reduced light availability. In summary, this work showed the possibility of utilizing microalgae in wastewater treatment to efficiently remove nutrients and organic matter, and simultaneously promote microalgal growth. Selecting suitable microalgal species for the specific wastewater to remove nutrients and organic matter is essential to promote algae-based wastewater treatment applications.

General information

Publication status: Published
MoE publication type: G5 Doctoral dissertation (article)
Organisations: Materials Science and Environmental Engineering
Contributors: Tao, R.
Number of pages: 153
Publication date: 22 May 2019

Publication information

Publisher: Tampere University
Original language: English

Publication series

Name: Tampere Univeristy Dissertations
URLs: 

Research output: Book/ReportDoctoral thesisCollection of Articles

Low concentration of zeolite to enhance microalgal growth and ammonium removal efficiency in a membrane photobioreactor

The aim of this work was to study the growth and nutrient removal efficiency of a mixed microalgal culture with and without the addition of low concentrations (0.5, 1, and 5 g L-1 of total liquid volume in the reactor) of natural zeolite. A control test in which only zeolite was added into a similar membrane photobioreactor was also conducted. The addition of 0.5 g L−1 zeolite to a continuously-fed membrane photobioreactor increased the microalgal biomass concentration from 0.50 to 0.90–1.17 g particulate organic carbon per L while the average ammonium removal efficiency increased from 14% to 30%. Upon microscopic inspection, microalgal cells were observed growing on the surface of zeolite particles, which indicates that zeolite can support attached microalgal growth. With higher zeolite doses (1 and 5 g L−1) inside the reactor, however, the breaking apart of added zeolite particles into finer particles dramatically increased solution turbidity, which likely was not beneficial for microalgal growth and ammonium removal due to reduced light penetration. This work shows that low doses of zeolite can be used as microcarriers to enhance microalgal biomass concentration and ammonium removal efficiency, while minimizing zeolite dose would likely reduce the turbidity effects.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Bio- and Circular Economy, Materials Science and Environmental Engineering, University of South Florida Tampa, UNESCO-IHE Institute for Water Education, Delft, Institut de Physique du Globe de Paris
Contributors: Tao, R., Bair, R., Pickett, M., Calabria, J. L., Lakaniemi, A., van Hullebusch, E. D., Rintala, J. A., Yeh, D. H.
Number of pages: 15
Publication date: 2020
Peer-reviewed: Yes

Publication information

Journal: Environmental Technology
ISSN (Print): 0959-3330
Original language: English
ASJC Scopus subject areas: Environmental Chemistry, Water Science and Technology, Waste Management and Disposal
Keywords: membrane photobioreactor, Microalgal growth, nutrient removal, turbidity, wastewater treatment
Source: Scopus
Source ID: 85084252299

Research output: Contribution to journalArticleScientificpeer-review

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

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

Vesiyhtymien toiminnan kehittäminen

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Takala, A., Hukka, J., Katko, T., Pietilä, P.
Pages: 14-18
Publication date: 2008
Peer-reviewed: Yes

Publication information

Journal: Vesitalous
Issue number: 3
ISSN (Print): 0505-3838
Original language: Finnish

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 13613

Research output: Contribution to journalArticleScientificpeer-review

Tulevaisuuden vesiosaajat

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Chemistry and Bioengineering
Contributors: Takala, A., Heinonen, U., Innala, T., Lundgren, K., Mattila, H., Vahala, R., Vuola, S.
Pages: 6-7
Publication date: 2012
Peer-reviewed: No

Publication information

Journal: Vesitalous
Volume: 53
Issue number: 3
ISSN (Print): 0505-3838
Original language: Finnish

Bibliographical note

Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: Talotekniikka-Julkaisut Oy yhteistyössä Suomen Vesiyhdistys ry.

Source: researchoutputwizard
Source ID: 5387

Research output: Contribution to journalArticleScientific

The evolving role of water co-operatives in Finland

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Takala, A. J., Arvonen, V., Katko, T. S., Pietilä, P. E., Åkerman, M. W.
Pages: 11-19
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: International Journal of Co-Operative Management
Volume: 5
Issue number: 2
ISSN (Print): 1741-4814
Original language: English

Bibliographical note

ei ut-numeroa 17.5.2014<br/>Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 7349

Research output: Contribution to journalArticleScientificpeer-review

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

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

Sustainability competencies of engineers in the field of water supply and sanitation

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Chemistry and Bioengineering
Contributors: Takala, A.
Pages: 180-181
Publication date: 2011

Host publication information

Title of host publication: World Sustainable Building Conference SB11, October 18-21, 2011, Helsinki, Finland
Place of publication: Helsinki
Publisher: RIL - Finnish Association of Civil Engineers
ISBN (Print): 978-951-758-534-7

Publication series

Name: World Sustainable Building Conference SB11
Publisher: RIL - Finnish Association of Civil Engineers
Volume: 2
ISSN (Print): 0356-9403

Bibliographical note

poistettu tupla r=3722.Ei ut-numeroa 17.5.2014<br/>Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 7348

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

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

Learning for sustainable water and sanitation services

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Chemistry and Bioengineering
Contributors: Takala, A.
Pages: 250-258
Publication date: 2016

Host publication information

Title of host publication: Proceedings of the 8th International Conference on Engineering Education for Sustainable Development (Bruges, 4-7 September 2016) : Building a circular economy together
Place of publication: Brugge
Publisher: Instituut vóór Duu rzame Ontwikkeling vzw
Editor: Mazijn, B.
Article number: D.3.2
ISBN (Electronic): 978-90-903-0131-0

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

Understanding sustainable development in Finnish water supply and sanitation services

Water supply and sanitation services are essential to human and environmental well-being. Globally one of the biggest challenges to sustainable development is lack of access to improved water supply and sanitation services. Yet it is less obvious what sustainable development means in countries with high coverage of these services. In this article sustainable development is explored from the perspective of Finnish water supply and sanitation services. The study consists of eight semi-structured interviews with water sector experts and their views are analysed in relation to literature. In this article sustainable development is understood as a learning process and dialogue of values. The interviewed water sector experts primarily perceive sustainable development from an environmental point of view, and treat it in a rationalistic and mechanistic manner. Challenges are tackled by technological fixes, such as improving energy and material efficiency. It is argued in this paper that this kind of approach undermines the complexity and dynamicity of sustainable development and can suppress learning. Sustainable development is mostly explored only from the perspective of water services, although some of the interviewees recognise their role for wider societal development. Interaction and dialogue between water sector experts and the community regarding sustainable development is lacking or skills to accomplish this interaction are inadequate.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering
Contributors: Takala, A.
Pages: 501-512
Publication date: Dec 2017
Peer-reviewed: Yes
Early online date: 16 Dec 2017

Publication information

Journal:  International Journal of Sustainable Built Environment
Volume: 6
Issue number: 2
ISSN (Print): 2212-6090
Ratings: 
  • Scopus rating (2017): CiteScore 3.2 SJR 0.746 SNIP 2.184
Original language: English
Keywords: Sustainable development, Water supply services, Sanitation services, Finland
Electronic versions: 
Source: RIS
Source ID: urn:C2FE0242F9120141394460CED76A001D

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

Struvite precipitation in raw and co-digested swine slurries for nutrients recovery in batch reactors

The release of nitrogen (N) and phosphorus (P) from agro-industrial sources is a major environmental concern. Furthermore, the scarcity of mineable P and the growing demand for food worldwide necessitate that we find an alternative P source. This study applied struvite precipitation for N-P recovery to slurries with high levels of organics and ammonia to achieve environmental protection from excessive nutrients diffusion and to generate a sustainable P source. Batch tests were carried out on raw and co-digested swine slurries to study the feasibility of struvite precipitation and the effect of several parameters, including pH, reaction time, competing ions (Ca<sup>2+</sup>, K<sup>+</sup>), total solids (TS), and alkalinity. The batch assays with raw swine slurries showed high N-P removals (up to 80%), while the anaerobic liquor returned lower recovery efficiency due to the high solids and alkali content. Struvite crystallization was detected at pH values as low as 6, and the characteristics of the recovered struvite matched those of the theoretical. Slight co-precipitation of calcium-phosphates occurred and was dependent on the Ca<sup>2+</sup>/Mg<sup>2+</sup> ratio rather than on varying pH values. Struvite precipitation was shown to be feasible in complex matrices as agro-industrial effluents, characterized by high NH<inf>4</inf><sup>+</sup>, alkalinity, solids and organic content, and interfering ions such as Ca<sup>2+</sup> and K<sup>+</sup>.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Taddeo, R., Lepistö, R.
Number of pages: 6
Pages: 892-897
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Water Science and Technology
Volume: 71
Issue number: 6
ISSN (Print): 0273-1223
Ratings: 
  • Scopus rating (2015): CiteScore 2.2 SJR 0.464 SNIP 0.596
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Water Science and Technology
Keywords: Eutrophication, Manure treatment, Nutrients removal and recovery, Struvite
Source: Scopus
Source ID: 84929000113

Research output: Contribution to journalArticleScientificpeer-review

Sustainable nutrients recovery and recycling by optimizing the chemical addition sequence for struvite precipitation from raw swine slurries

Livestock farming contributes heavily to nitrogen (N) and phosphorus (P) flows into the environment, a major cause of eutrophication of coastal and freshwater systems. Furthermore, the growing demand for N-P fertilizers is increasing the emission of anthropogenic reactive N into the atmosphere and the depletion of the current P reserves. Therefore, it is essential to minimize the anthropogenic impact on the environment and recycle the wasted N-P for agricultural reuse. This study focused on enhancing struvite (MgNH4PO4*6H2O) precipitation from raw swine slurries in batch and laboratory-scale reactors. Different chemical addition sequences were evaluated, and the best removal efficiency (E%) was obtained when the chemicals were mixed before the precipitation process. Struvite was detected at a pH as low as 6 (E%N-P∼50%), and high E%N-P was found at pH 7–9.5 (80–95%). Furthermore, air stripping was used in place of NaOH to adjust pH, returning the same efficiency as if only alkali had been used. XRD and FE-SEM analysis of the precipitate showed that the recovered struvite was of high purity with orthorhombic crystalline structure and only trace amounts of impurities from matrix organics, co-precipitation products (CaO and amorphous calcium-phosphates), and residuals of added chemicals (MgO).

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Department of Materials Science
Contributors: Taddeo, R., Kolppo, K., Lepistö, R.
Number of pages: 7
Pages: 52-58
Publication date: 15 Sep 2016
Peer-reviewed: Yes

Publication information

Journal: Journal of Environmental Management
Volume: 180
ISSN (Print): 0301-4797
Ratings: 
  • Scopus rating (2016): CiteScore 5.9 SJR 1.161 SNIP 1.833
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Waste Management and Disposal, Management, Monitoring, Policy and Law
Keywords: Air stripping, Chemical addition, Crystallization, Manure management, Nutrients recycling, Struvite
Source: Scopus
Source ID: 84978733912

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

The application of HPLC-SEC for the simultaneous characterization of NOM and nitrate in well waters

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Szabo, H., Tuhkanen, T.
Pages: 779-786
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Chemosphere
Volume: 80
Issue number: 7
ISSN (Print): 0045-6535
Ratings: 
  • Scopus rating (2010): SJR 1.879 SNIP 1.432
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 9356

Research output: Contribution to journalArticleScientificpeer-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

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

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

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

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

Managing water supply through joint regional municipal authorities in Finland: Two comparative cases

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Stenroos, M., Katko, T. S.
Pages: 667-681
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: Water
Volume: 3
Issue number: 2
ISSN (Print): 2073-4441
Ratings: 
  • Scopus rating (2011): CiteScore 2.1 SNIP 0.851
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 7305

Research output: Contribution to journalArticleScientificpeer-review

Water security and resilience

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Research group: Capacity Development of Water and Environmental Services CADWES, Civil Engineering
Contributors: Staddon, Juuti, P., Katko, T. S., Mattila, H., Rajala, R., Schwartz, K.
Number of pages: 6
Pages: 9-14
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

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

To fractionate municipal solid waste incineration bottom ash: Key for utilisation?

For the past decade, the Finnish waste sector has increasingly moved from the landfilling of municipal solid waste towards waste incineration. New challenges are faced with the growing amounts of municipal solid waste incineration bottom ash, which are mainly landfilled at the moment. Since this is not a sustainable or a profitable solution, finding different utilisation applications for the municipal solid waste incineration bottom ash is crucial. This study reports a comprehensive analysis of bottom ash properties from one waste incineration plant in Finland, which was first treated with a Dutch bottom ash recovery technique called advanced dry recovery. This novel process separates non-ferrous and ferrous metals from bottom ash, generating mineral fractions of different grain sizes (0–2 mm, 2–5 mm, 5–12 mm and 12–50 mm). The main aim of the study was to assess, whether the advanced bottom ash treatment technique, producing mineral fractions of different grain sizes and therefore properties, facilitates the utilisation of municipal solid waste incineration bottom ash in Finland. The results were encouraging; the bottom ash mineral fractions have favourable behaviour against the frost action, which is especially useful in the Finnish conditions. In addition, the leaching of most hazardous substances did not restrict the utilisation of bottom ash, especially for the larger fractions (>5 mm). Overall, this study has shown that the advanced bottom ash recovering technique can be one solution to increase the utilisation of bottom ash and furthermore decrease its landfilling in Finland.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Suomen Erityisjäte Oy
Contributors: Sormunen, L. A., Rantsi, R.
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Waste Management and Research
ISSN (Print): 0734-242X
Ratings: 
  • Scopus rating (2015): CiteScore 2.6 SJR 0.623 SNIP 0.918
Original language: English

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

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

Mechanical properties of recovered municipal solid waste incineration bottom ash: the influence of aging and changes in moisture content

The scarcity of non-renewable natural resources and the demand for waste recycling and utilization are steering towards increasing use of waste-derived materials in civil engineering structures. However, as the quality of different waste-derived materials can vary depending on input materials and processes in which they are generated, the utilization of these materials in civil engineering may be risky and cumbersome unless their properties are well-known. In Finland, due to the recently increased number of waste incineration plants, nearly 300 000 t of municipal solid waste incineration bottom ash (MSWI BA) is generated annually in the country. As the material is mainly landfilled or used in landfill site structures at the moment, the utilization of MSWI BA in different civil engineering applications could be increased, if the essential properties of the material were properly understood. In this study, the mechanical properties of recovered MSWI BA were investigated with cyclic load and static triaxial tests.. The study focused especially on the influence of changes in moisture content and its relation to the development of recovered MSWI BA stiffness and strength properties over time. The obtained results showed that the stiffness of recovered MSWI BA was highly affected by the changes in moisture content over time but also the material aging had an influence. The resilient modulus, Mr, was at least doubled during the two months storage of test specimens. Furthermore, when the MSWI BA material dried out and the moisture content decreased 5-7 %, the resilient modulus, Mr, of the material was even quadrupled.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research area: Infrastructure Construction, Research group: Earth Constructions
Contributors: Sormunen, L. A., Kolisoja, P.
Pages: 252-270
Publication date: 2018
Peer-reviewed: Yes
Early online date: 13 Nov 2016

Publication information

Journal: Road Materials and Pavement Design
Volume: 19
Issue number: 2
ISSN (Print): 1468-0629
Ratings: 
  • Scopus rating (2018): CiteScore 3.3 SJR 0.963 SNIP 1.344
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Valorization of Finnish mining tailings for use in the ceramics industry

The present study valorized Finnish mining tailings waste to identify opportunities for the use of ceramics technologies. On the basis of their mineralogical and chemical contents, the five selected tailings wastes represented felsic mining tailings (FMT) rich in quartz and alkali feldspars, mining tailings dominated by Mg- and Fe-bearing minerals (MgFeMT), and mining tailings rich in carbonate minerals (CMT). Preliminary pilot studies indicated that the FMT materials are potential secondary raw materials for mullite-type ceramics. An Al additive was needed, since the Al2O3 content of the studied tailings was too low for mullitization. In addition, carbonate-bearing tailings with Ca silicates can be applicable for chemically bonded phosphate ceramic (CBPC) synthesis. Based on a literature review, FMT are viable source materials for the production of geopolymers, but a high initial Si:Al ratio (in quartz-rich FMT) may lead to partial geopolymerization. Preliminary results from the geopolymerization of pre-heated phlogopite mica mixed with metakaolin gave promising findings, with the formation of a geopolymer having good compressive strength. The findings support the viability of MgFeMT materials rich in phlogopite mica for the production of alkali-activated ceramics.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science, Research group: Ceramic materials, Geological Survey of Finland, VTT, Geologian tutkimuskeskus, University of Oulu
Contributors: Solismaa, S., Ismailov, A., Karhu, M., Sreenivasan, H., Lehtonen, M., Kinnunen, P., Illikainen, M., Räisänen, M.
Pages: 33-54
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: BULLETIN OF THE GEOLOGICAL SOCIETY OF FINLAND
Volume: 90
Issue number: 1
ISSN (Print): 0367-5211
Ratings: 
  • Scopus rating (2018): CiteScore 1 SJR 0.244 SNIP 0.376
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

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

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

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

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

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

Sähköautoilla suuri vähennys päästöihin - pian myös kilpailukykyiseen hintaan

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, Helsingin yliopisto, 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
Original language: Finnish

Research output: Book/ReportCommissioned reportProfessional

Replacing centralised waste and sanitation infrastructure with local treatment and nutrient recycling: Expert opinions in the context of urban planning

Solutions for resource scarcity should be sought from urban waste management and sanitation, which are characterised by central plants and long networks. The socio-technical transition to more sustainable infrastructure is expected to include partial decentralisation based on local conditions. This paper focuses on drivers, barriers and enablers in implementing a decentralised circular system in a new residential area (Tampere, Finland). In the alternative system, biowaste and feces are treated in a local biogas plant, and nutrient and energy output are utilised within the area. This research aims to understand what kind of urban planning enables alternative infrastructure, as well as the characteristics of an innovation capable of making a breakthrough. Seventeen infrastructure planning experts were interviewed, then assembled to re-develop ideas arising from the interviews. Based on these qualitatively analysed data, 11 factors which help the adoption of the alternative system were formulated. The results indicate that sustainability transition can be facilitated through impartial urban planning that allows the early participation of actors and improved communications. Additionally, studying the impact of alternative solutions and city guidance according to environmental policy aims may enhance transition. Innovation success factors include suitable locations, competent partners, mature technology and visible local benefits.

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: Särkilahti, M., Kinnunen, V., Kettunen, R., Jokinen, A., Rintala, J.
Pages: 195-204
Publication date: 2017
Peer-reviewed: Yes
Early online date: 21 Feb 2017

Publication information

Journal: Technological Forecasting and Social Change
Volume: 118
ISSN (Print): 0040-1625
Ratings: 
  • Scopus rating (2017): CiteScore 5.8 SJR 1.38 SNIP 1.744
Original language: English
ASJC Scopus subject areas: Business and International Management, Applied Psychology, Management of Technology and Innovation
Keywords: Alternative sanitation, Biogas, Nutrient recycling, Socio-technical transition, Tampere, Urban land-use planning
Source: Scopus
Source ID: 85013157702

Research output: Contribution to journalArticleScientificpeer-review

Rewiring the wax ester production pathway of acinetobacter baylyi ADP1

Wax esters are industrially relevant high-value molecules. For sustainable production of wax esters, bacterial cell factories are suggested to replace the chemical processes exploiting expensive starting materials. However, it is well recognized that new sophisticated solutions employing synthetic biology toolbox are required to improve and tune the cellular production platform to meet the product requirements. For example, saturated wax esters with alkanol chain lengths C12 or C14 that are convenient for industrial uses are rare among bacteria. Acinetobacter baylyi ADP1, a natural producer of wax esters, is a convenient model organism for studying the potentiality and modifiability of wax esters in a natural host by means of synthetic biology. In order to establish a controllable production platform exploiting well-characterized biocomponents, and to modify the wax ester synthesis pathway of A. baylyi ADP1 in terms product quality, a fatty acid reductase complex LuxCDE with an inducible arabinose promoter was employed to replace the natural fatty acyl-CoA reductase acr1 in ADP1. The engineered strain was able to produce wax esters by the introduced synthetic pathway. Moreover, the fatty alkanol chain length profile of wax esters was found to shift toward shorter and more saturated carbon chains, C16:0 accounting for most of the alkanols. The study demonstrates the potentiality of recircuiting a biosynthesis pathway in a natural producer, enabling a regulated production of a customized bioproduct. Furthermore, the LuxCDE complex can be potentially used as a well-characterized biopart in a variety of synthetic biology applications involving the production of long-chain hydrocarbons. © 2014 American Chemical Society.

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, Research area: Design, Development and LCM, Urban circular bioeconomy (UrCirBio), Neste Oil Oyj
Contributors: Santala, S., Efimova, E., Koskinen, P., Karp, M. T., Santala, V.
Number of pages: 7
Pages: 145-151
Publication date: 21 Mar 2014
Peer-reviewed: Yes

Publication information

Journal: ACS Synthetic Biology
Volume: 3
Issue number: 3
ISSN (Print): 2161-5063
Ratings: 
  • Scopus rating (2014): CiteScore 4.6 SJR 3.809 SNIP 1.134
Original language: English
ASJC Scopus subject areas: Biochemistry, Genetics and Molecular Biology (miscellaneous), Biomedical Engineering, Medicine(all)
Keywords: Acinetobacter baylyi ADP1, fatty-acyl CoA reductase, long chain aldehyde, luxCDE, recircuiting, wax ester

Bibliographical note

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

Source: researchoutputwizard
Source ID: 1454

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

Towards bioproduction of poly-α-olefins from lignocellulose

Bioprocesses involving more than one species can alleviate restrictions posed by limited substrate range of single species. Coupled, multistage cultures can be useful when heterogeneous substrates, such as lignocellulosic biomass, are exploited. Here, microbial production of α-olefins (C11) from lignocellulosic substrates, namely cellulose and technical lignin, was investigated. A two-stage culture with cellulose fermentation to organic acids by Clostridium cellulolyticum and subsequent upgrading of the organic acids to 1-undecene by engineered Acinetobacter baylyi ADP1 was established. As a result, A. baylyi ADP1 synthesised 107 μg L-1 of 1-undecene from cellulose. Additionally, ligninolytic effects by A. baylyi ADP1 on softwood were confirmed and downstream processing for continuous 1-undecene collection was introduced. In addition, the synthesis of poly-α-olefin trimers (C33) by the oligomerization of 1-undecene was demonstrated. This study demonstrates the potential of integrated multistage processes in treating challenging substrates.

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: Salmela, M., Lehtinen, T., Efimova, E., Santala, S., Santala, V.
Number of pages: 10
Pages: 5067-5076
Publication date: 2020
Peer-reviewed: Yes

Publication information

Journal: Green Chemistry
Volume: 22
Issue number: 15
ISSN (Print): 1463-9262
Original language: English
ASJC Scopus subject areas: Environmental Chemistry, Pollution
Source: Scopus
Source ID: 85089692039

Research output: Contribution to journalArticleScientificpeer-review

Näkökulma-kolumni: Putkiremontit kestävät aivan liian kauan

General information

Publication status: Published
Organisations: Civil Engineering
Contributors: Saari, A.
Publication date: 24 Nov 2016

Publication information

Publisher: Sanoma Talotekniikkajulkaisut Oy
Year: 2016
Original language: Finnish

Research output: Other contributionScientific

Subpicosecond to Second Time-Scale Charge Carrier Kinetics in Hematite-Titania Nanocomposite Photoanodes

Water splitting with hematite is negatively affected by poor intrinsic charge transport properties. However, they can be modified by forming heterojunctions to improve charge separation. For this purpose, charge dynamics of TiO2:alpha-Fe2O3 nanocomposite photoanodes are studied using transient absorption spectroscopy to monitor the evolution of photogenerated charge carriers as a function of applied bias voltage. The bias affects the charge carrier dynamics, leading to trapped electrons in the submillisecond time scale and an accumulation of holes with a lifetime of 0.4 +/- 0.1 s. By contrast, slower electron trapping and only few long-lived holes are observed in a bare hematite photoanode. The decay of the long-lived holes is 1 order of magnitude faster for the composite photoanodes than previously published for doped hematite, indicative of higher catalytic efficiency. These results illustrate the advantages of using composite materials to overcome poor charge carrier dynamics, leading to a 30-fold enhancement in photocurrent.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Frontier Photonics, Department of Chemistry and Bioengineering, Research group: Supramolecular photochemistry, Tampere University of Technology, ETH Zürich, Laboratory for Multifunctional Materials
Contributors: Ruoko, T. P., Kaunisto, K., Bärtsch, M., Pohjola, J., Hiltunen, A., Niederberger, M., Tkachenko, N. V., Lemmetyinen, H.
Number of pages: 6
Pages: 2859-2864
Publication date: 8 Jul 2015
Peer-reviewed: Yes

Publication information

Journal: Journal of Physical Chemistry Letters
Volume: 6
Issue number: 15
ISSN (Print): 1948-7185
Ratings: 
  • Scopus rating (2015): CiteScore 12.7 SJR 4.143 SNIP 1.719
Original language: English
ASJC Scopus subject areas: Materials Science(all)
Keywords: FILM ELECTRODES, IRON-OXIDE, SEMICONDUCTOR ELECTRODES, WATER OXIDATION, VISIBLE-LIGHT, ALPHA-FE2O3, PHOTOELECTRODES, TIO2, RECOMBINATION, ELECTROLYSIS
Electronic versions: 

Bibliographical note

AUX=mol,"Pohjola, Juuso"

Source: Scopus
Source ID: 84938694613

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

Methylophaga and Hyphomicrobium can be used as target genera in monitoring saline water methanol-utilizing denitrification

Which bacterial taxonomic groups can be used in monitoring saline water methanol-utilizing denitrification and whether nitrate is transformed into N2 in the process are unclear. Therefore, methylotrophic bacterial communities of two efficiently functioning (nitrate/nitrite reduction was 63–96 %) tropical and cool seawater reactors at a public aquarium were investigated with clone library analysis and 454 pyrosequencing of the 16S rRNA genes. Transformation of nitrate into N2 was confirmed using 15N labeling in incubation of carrier material from the tropical reactor. Combining the data with previous study results, Methylophaga and Hyphomicrobium were determined to be suitable target genera for monitoring the function of saline water methanol-fed denitrification systems. However, monitoring was not possible at the single species level. Interestingly, potential nitrate-reducing methylotrophs within Filomicrobium and closely related Fil I and Fil II clusters were detected in the reactors suggesting that they also contributed to methylotrophic denitrification in the saline environment.

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, Univ Helsinki, University of Helsinki, Dept Environm Sci, Univ Jyvaskyla, University of Jyvaskyla, Dept Biol & Environm Sci, Nanosci Ctr
Contributors: Rissanen, A. J., Ojala, A., Dernjatin, M., Jaakkola, J., Tiirola, M.
Pages: 1-11
Publication date: 1 Oct 2016
Peer-reviewed: Yes

Publication information

Journal: Journal of Industrial Microbiology and Biotechnology
ISSN (Print): 1367-5435
Ratings: 
  • Scopus rating (2016): CiteScore 5.1 SJR 0.958 SNIP 0.94
Original language: English
Electronic versions: 
URLs: 

Research output: Contribution to journalArticleScientificpeer-review

Methylophilaceae and Hyphomicrobium as target taxonomic groups in monitoring the function of methanol-fed denitrification biofilters in municipal wastewater treatment plants

Molecular monitoring of bacterial communities can explain and predict the stability of bioprocesses in varying physicochemical conditions. To study methanol-fed denitrification biofilters of municipal wastewater treatment plants, bacterial communities of two full-scale biofilters were compared through fingerprinting and sequencing of the 16S rRNA genes. Additionally, 16S rRNA gene fingerprinting was used for 10-week temporal monitoring of the bacterial community in one of the biofilters. Combining the data with previous study results, the family Methylophilaceae and genus Hyphomicrobium were determined as suitable target groups for monitoring. An increase in the relative abundance of Hyphomicrobium-related biomarkers occurred simultaneously with increases in water flow, NO x(-) load, and methanol addition, as well as a higher denitrification rate, although the dominating biomarkers linked to Methylophilaceae showed an opposite pattern. The results indicate that during increased loading, stability of the bioprocess is maintained by selection of more efficient denitrifier populations, and this progress can be analyzed using simple molecular fingerprinting.

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, University of Jyväskylä
Contributors: Rissanen, A. J., Ojala, A., Fred, T., Toivonen, J., Tiirola, M.
Pages: 1-13
Publication date: 8 Nov 2016
Peer-reviewed: Yes

Publication information

Journal: Journal of Industrial Microbiology and Biotechnology
ISSN (Print): 1367-5435
Ratings: 
  • Scopus rating (2016): CiteScore 5.1 SJR 0.958 SNIP 0.94
Original language: English
Electronic versions: 
URLs: 
Source: PubMed
Source ID: 27826724

Research output: Contribution to journalArticleScientificpeer-review

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

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

Spatial variations in bacterial and archaeal abundance and community composition in boreal forest pine mycorrhizospheres

Mycorrhizal fungi have a strong impact on soil biota. In this study, bacterial and archaeal populations in different parts of Suillus bovinus - Pinus sylvestris mycorrhizospheres in boreal forest were quantified and identified by DNA analysis. The numbers of bacterial and archaeal 16S rRNA gene copies were highest in uncolonized humus and lowest in fruiting bodies. The numbers of bacterial 16S rRNA gene copies varied from 1.3 × 107 to 3.1 × 109 copies g−1 fw and archaeal copies from 4.1 × 107 to 9.6 × 108 copies g−1 fw. The relatively high number of archaeal 16S rRNA gene copies was likely due to the cold and highly organic habitat. The presence of hyphae appeared to further promote archaeal numbers and the archaea:bacteria ratio was over one in samples containing only fungal material. Most detected archaea belonged to terrestrial Thaumarchaeota. Proteobacteria, Actinobacteria and Acidobacteria were predictably the dominating bacterial taxa in the samples with clear trend of Betaproteobacteria preferring the pine root habitats.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Research group: Bio- and Circular Economy, University of Helsinki
Contributors: Rinta-Kanto, J. M., Timonen, S.
Number of pages: 7
Publication date: 2020
Peer-reviewed: Yes

Publication information

Journal: EUROPEAN JOURNAL OF SOIL BIOLOGY
Volume: 97
Article number: 103168
ISSN (Print): 1164-5563
Original language: English
ASJC Scopus subject areas: Microbiology, Soil Science, Insect Science
Keywords: Archaea, Bacteria, Ectomycorrhiza, Microbial community, Mycorrhizosphere, Sporocarp
Source: Scopus
Source ID: 85079366441

Research output: Contribution to journalArticleScientificpeer-review

Sanitation, water and health

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Rautanen, S., Luonsi, A., Nygård, H., Vuorinen, H., Rajala, R.
Pages: 173-194
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Environment and History
Volume: 16
Issue number: 2
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: 9094

Research output: Contribution to journalArticleScientificpeer-review

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

Luminescent bacteria-based sensing method for methylmercury specific determination

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Rantala, A., Utriainen, M., Kaushik, N., Virta, M., Välimaa, A., Karp, M.
Pages: 1041-1049
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: Analytical and Bioanalytical Chemistry
Volume: 400
Issue number: 4
ISSN (Print): 1618-2642
Ratings: 
  • Scopus rating (2011): CiteScore 5.4 SJR 1.37 SNIP 1.277
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 7088

Research output: Contribution to journalArticleScientificpeer-review

Kuka päättää vesihuollon tulevaisuudesta? (Who decides on the future of the water supply?)

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Chemistry and Bioengineering, Department of Civil Engineering, Former organisation of the author
Contributors: Rajala, R., Juuti, P., Katko, T.
Number of pages: 2
Pages: 33-34
Publication date: 2014
Peer-reviewed: No

Publication information

Journal: Vesitalous
Volume: 51
Issue number: 1
ISSN (Print): 0505-3838
Original language: Finnish

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-09-16<br/>Publisher name: Maa- Ja Vesitekniikan Tuki

Source: researchoutputwizard
Source ID: 1334

Research output: Contribution to journalArticleScientific

Pohjavesi, meidän vesi

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: 110-147
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): ISBN 978-951-44-8136-9

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

Verkoston varrella

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: 184-229
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): ISBN 978-951-44-8136-9

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

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

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

Students’ Perceived Priorities on Water as a Human Right, Natural Resource, and Multiple Goods

s often noted, water is one of the most critical natural resources in the world—one we must take care of so that future generations can enjoy safe water. This study specifically explores university-level water and environmental students’ views on perceived priorities on water. The recent debate on water policy and its complexity is first reviewed, followed by a study on how students perceived water through six predetermined criteria. Interactive learning events (n = 241) were arranged worldwide in 2011–2015 in seven countries and one region: Finland, Latvia, South Africa, Brazil, Mexico, Sri Lanka, USA, and Southern Africa region. The relative distribution of the criteria totaling 100% were as follows: Basic human right 31%, natural resource 25%, economic good 15%, public and social good both 11%, and cultural good 7%. The views did not substantially differentiate despite the different socio-economic conditions. Yet, basic human right should be interpreted wisely remembering environmental, economic, and other realities. Here, the target group consisted of water and environmental students, and it would be very interesting to conduct a comparative study among students in other fields (sociology, economics, etc.). On the whole, we should further analyze the value of water and its priorities to make it easier to manage water resources in the future.

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, University of Latvia
Contributors: Rajala, R. P., Katko, T. S., Springe, G.
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: Sustainability
Volume: 11
Issue number: 22
Article number: 6354
ISSN (Print): 2071-1050
Ratings: 
  • Scopus rating (2019): CiteScore 3.2 SJR 0.581 SNIP 1.165
Original language: English

Research output: Contribution to journalArticleScientificpeer-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

Nature and extent of potable water consumption in Tampere (Finland) and Carletonville (South Africa)

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., Nealer, E.
Number of pages: 14
Pages: 149-162
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

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

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

Two Years after Donor Funding Ended: Success Factors for Schools to Keep their Urine-Diverting Dry Toilets (UDDTs) Clean and Well Maintained

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Chemistry and Bioengineering
Contributors: Pynnönen, K., Tuhkanen, T., Rieck, C., von Munch, E.
Number of pages: 10
Pages: 1-10
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: 5122

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

Simultaneous detection of three antiviral and four antibiotic compounds in source-separated urine with liquid chromatography

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Pynnönen, S., Tuhkanen, T. A.
Number of pages: 9
Pages: 219-227
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Journal of Separation Science
Volume: 37
Issue number: 3
ISSN (Print): 1615-9306
Ratings: 
  • Scopus rating (2014): CiteScore 4.4 SJR 1.124 SNIP 1.005
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-02-15<br/>Publisher name: Wiley - V C H Verlag GmbH & Co. KGaA

Source: researchoutputwizard
Source ID: 1319

Research output: Contribution to journalArticleScientificpeer-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

Rural household electricity load profiles with a load simulation tool

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Energy and Process Engineering
Contributors: Poudyal, A., Mustonen, S., Paatero, J.
Pages: 1358-1366
Publication date: 2010

Host publication information

Title of host publication: International Conference on Applied Energy (ICAE 2010), Energy Solutions for a Sustainable World, 21-23 April 2010, Singapore

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 9035

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

The effect of lake bottom sediment layers on radionuclide transport from bedrock to biosphere and doses to humans

General information

Publication status: Published
Organisations: Pori, Research group: Data-analytics and Optimization
Contributors: Pohjola, J., Turunen, J., Lipping, T.
Number of pages: 2
Pages: 439-440
Publication date: 3 Sep 2017
Peer-reviewed: Unknown
Event: Paper presented at 4th International Conference on Radioecology & Environmental Radioactivity, Berlin, Germany.
ASJC Scopus subject areas: Computer Science Applications

Bibliographical note

Abstracts Book ISBN: 978-2-9545237-7-4

Research output: Other conference contributionPaper, poster or abstractScientific

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

Reducing CO2 emissions from freight: Recent developments in freight transport in the Nordic countries and instruments for CO2 reductions

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
Contributors: Pinchasik, D., Hovi, I. B., Vierth, I., Mellin, A., Liimatainen, H., Kristensen, N.
Number of pages: 129
Publication date: 2018

Publication information

Publisher: NORDIC COUNCIL OF MINISTERS
ISBN (Print): 978-92-893-5901-6
ISBN (Electronic): 978-92-893-5902-3
Original language: English

Publication series

Name: Temanord
ISSN (Print): 0908-6692

Research output: Book/ReportCommissioned reportProfessional

Vesi kuntayhteistyön voiteluaineena

General information

Publication status: Published
MoE publication type: D5 Text book, professional manual or guide or a dictionary
Organisations: Department of Chemistry and Bioengineering
Contributors: Pietilä, P., Katko, T., Kurki, V.
Number of pages: 111
Publication date: 2010

Publication information

Place of publication: Helsinki
Publisher: Kaks - Kunnallisalan kehittämissäätiö
ISBN (Print): 978-952-5801-23-1
Original language: Finnish

Publication series

Name: Kunnallisalan kehittämissäätiö tutkimusjulkaisut
Publisher: Kaks - Kunnallisalan kehittämissäätiö
Volume: 62
ISSN (Print): 1235-6956

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8998

Research output: Book/ReportBookProfessional

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

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

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

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

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

Removal of odours in dry toilets by biofiltration

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Chemistry and Bioengineering
Contributors: Palmroth, M., Kolha, V., Ramos Garcia, A., Perrier, L., Richter, C., Tuhkanen, T.
Number of pages: 4
Pages: 1-4
Publication date: 2012

Host publication information

Title of host publication: ECO STP, EcoTechnologies for Wasterwater Treatment, Technical, Environmental & Economic Challenges, Santiago de Compostela, Spain, 25-27 June 2012
Publisher: International Water Association IWA
ISBN (Print): 978-84-695-3605-6

Publication series

Name: EcoTechnologies for Wasterwater Treatment, IWA International Conference

Bibliographical note

ei ut-numeroa 27.8.2013<br/>Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: International Water Association IWA

Source: researchoutputwizard
Source ID: 5010

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

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

The effect of climate change on freeze-thaw durability of concrete structures in Finland

Lahdensivu presented in his Doctoral Thesis (Durability Properties and Actual Deterioration of Finnish Concrete Facades and Balconies, 2012) that without proper air-entrainment outdoor concrete structures have needed average of 307 freeze-thaw cycles (threshold value: t ≤ -5 °C) after a rain event in southern Finland and 388 cycles in inland for incipient freeze-thaw damage to occur. The difference between figures can be explained by the greater amount of wind-driven rain (WDR) before the freeze-thaw cycle on coastal areas.
As a consequence of climate change it has been shown that by the end of the century, the amount of WDR is going to increase 30 % at southern Finland and 40 % at inland. At the same time the amount of freeze-thaw cycles after a rain event are decreasing significantly at both locations which indicates freeze-thaw durability-wise longer service life for outdoor concrete structures. However, the latest studies show that while the amount of freeze-thaw cycles is decreasing, the amount of WDR before the cycles is also increasing significantly.
The WDR at winter time in Finland is highly orientated on west to south-east directions which can be seen also by the degradation rate observations of concrete facades and balconies based on condition assessments. In this study, the changes at WDR before the freeze-thaw events and the effect of climate change on them depending on the structure orientation are calculated to estimate the changes of climatic stress level on outdoor concrete structures.

General information

Publication status: Published
Organisations: Department of Civil Engineering, Research group: Service Life Engineering of Structures, Tampere University of Technology
Contributors: Pakkala, T., Lemberg, A., Lahdensivu, J.
Number of pages: 1
Pages: 53
Publication date: Jun 2016
Peer-reviewed: Unknown
Event: Paper presented at OCEANEXT : Interdisciplinary Conference, .
ASJC Scopus subject areas: Civil and Structural Engineering
Keywords: Freeze/thaw, Concrete, Wind-driven rain, Service life

Bibliographical note

INT=rak,"Lemberg, Antti-Matti"

Research output: Other conference contributionPaper, poster or abstractScientific

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

Occupational Exposure to Extremely Low Frequency Electric Fields in Office Work

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Pääkkönen, R., Tarao, H., Gobba, F., Korpinen, L.
Pages: 823-825
Publication date: 2012

Host publication information

Title of host publication: PIERS 2012 Moscow Proceedings, August 19-23, 2012, Moscow, Russia
Publisher: Electromagnetics Academy
ISBN (Print): 978-1-934142-22-6

Publication series

Name: Progress in Electromagnetics Research Symposium
ISSN (Print): 1559-9450

Bibliographical note

ei ut-numeroa 27.8.2013<br/>Contribution: organisation=epr,FACT1=1<br/>Publisher name: Electromagnetics Academy

Source: researchoutputwizard
Source ID: 4997

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

The doors of operating devices mitigation influence to the electric field exposure at 110kV substation tasks on service platforms

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Pääkkönen, R., Lahtinen, S., Korpinen, L.
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 26.4.2014<br/>Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 6939

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

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

The potential of biomethane in replacing fossil fuels in heavy transport-a case study on Finland

Electrification is a frequently discussed solution for reducing transport related carbon dioxide emissions. However, transport sectors such as aviation and heavy-duty vehicles remain dependent on on-board fuels. Here, biomethane is still a little exploited solution, and the case of heavy-duty vehicles is particularly underappreciated despite the recent technical advances and potentially notable emission reductions. This paper discusses the potential of biomethane in heavy-duty road transport in the case of Finland, where the utilization rate is low compared to the technical potential. To this end, the potential of biomethane production through both anaerobic digestion and gasification was calculated in three scenarios for the heavy-duty transport fleet, based on the literature values of biomethane potential and truck class fuel consumption. The authors find that approximately half of the heavy-duty transport in Finland could be biomethane fueled by 2030. The estimated production costs for biomethane (81-190 €/MWh) would be competitive with the current consumer diesel price (152 €/MWh). Utilizing the total biomethane potential in heavy-duty transport would furthermore decrease the respective carbon dioxide emissions by 50%. To accelerate the transition in the heavy-duty transport sector, a more comprehensive political framework is needed, taking into account both production and consumption.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Bio- and Circular Economy, Materials Science and Environmental Engineering, MAB Powertec Oy, Tampere University
Contributors: Pääkkönen, A., Aro, K., Aalto, P., Konttinen, J., Kojo, M.
Publication date: 1 Sep 2019
Peer-reviewed: Yes

Publication information

Journal: Sustainability
Volume: 11
Issue number: 17
Article number: 4750
ISSN (Print): 2071-1050
Ratings: 
  • Scopus rating (2019): CiteScore 3.2 SJR 0.581 SNIP 1.165
Original language: English
ASJC Scopus subject areas: Geography, Planning and Development, Renewable Energy, Sustainability and the Environment, Management, Monitoring, Policy and Law
Keywords: Anaerobic digestion, Biomethane, Carbon emission reduction, Finland, Heavy-duty transport, Renewable transport fuels, Transition, Wood gasification
Electronic versions: 
Source: Scopus
Source ID: 85071977101

Research output: Contribution to journalArticleScientificpeer-review

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

Revisiting the feasibility of biomass-fueled CHP in future energy systems – Case study of the Åland Islands

Biomass has been widely recognized as a sustainable fuel for balancing energy systems with high amounts of varying renewable energy production, mainly from wind or solar power. Combined heat and power (CHP) is an efficient technology for biomass utilization and energy system balancing. Currently, the increasing amount of renewable power production often reduces the price of electricity, which makes CHP plants uneconomical. However, this might not be the case in the future, when the subsidies for developing renewable energy sources are reduced or removed. This paper presents a feasibility analysis of the potential for operational flexibility in a bio-fueled CHP plant in a real-life environment using a spreadsheet model. Three different renewable power production schemes for the Åland Islands were analyzed: the present system, a balanced scenario and a high-wind scenario. The analysis was conducted for three different-sized CHP plants run in modes which followed either the heat or the power load. Moreover, in one case two more parameters affecting the magnitude and rate of the flexibility were thoroughly examined: the start-up time and the minimum plant load. The results showed that biomass does have a place in future energy systems, and the spreadsheet tool can effectively be used for a CHP feasibility assessment in different operational environments; both for existing CHP plants and for planning new investments. The results indicate that the availability of inexpensive fuel and sufficient income from heat sales have to be secured as the operational environment of the CHP plant changes. The examination of the operational mode revealed that in the power-following mode, where the CHP plant can offer flexibility services, the plant’s profitability depends on the rate of compensation for the excess heat or spinning hours.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Bio- and Circular Economy, Materials Science and Environmental Engineering, Valmet Technologies
Contributors: Pääkkönen, A., Joronen, T.
Pages: 66 - 75
Publication date: 15 May 2019
Peer-reviewed: Yes

Publication information

Journal: Energy Conversion and Management
Volume: 188
ISSN (Print): 0196-8904
Ratings: 
  • Scopus rating (2019): CiteScore 13.6 SJR 2.924 SNIP 2.364
Original language: English
Keywords: Biomass, Operational flexibility, Bio-CHP profitability
Source: Bibtex
Source ID: PAAKKONEN201966

Research output: Contribution to journalArticleScientificpeer-review

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

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

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"

Awarding institution:Tampereen teknillinen yliopisto - Tampere University of Technology<br/>Submitter:Submitted by Kaisa Kulkki (kaisa.kulkki@tut.fi) on 2015-02-17T12:35:27Z
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Source: researchoutputwizard
Source ID: 123456789/22778

Research output: Book/ReportDoctoral thesisMonograph

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

Reduction of combustion-generated emissions by means of multiobjective optimization and computational fluid dynamics

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Department of Energy and Process Engineering
Contributors: Oksanen, A., Saario, A. J.
Number of pages: 17
Pages: 1-17
Publication date: 2011

Host publication information

Title of host publication: CFD & Optimization 2011, Methods and Applications, ECCOMAS Thematic Conference, 23-25 May 2011, Antalya, Turkey
Place of publication: Antalya
Publisher: ECCOMAS
ISBN (Print): 978-605-61427-4-1

Publication series

Name: ECCOMAS Thematic Conference on CFD & Optimization, Methods and Applications
Publisher: ECCOMAS

Bibliographical note

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

Source: researchoutputwizard
Source ID: 6920

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

Simulointi nopeuttaa käyttöiän määritystä

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Department of Materials Science, Research group: Tribology and Machine Elements, Department of Mechanical Engineering and Industrial Systems, Research group: Kokeellinen virtaustekniikka, Research area: Applied Mechanics, Department of Intelligent Hydraulics and Automation, Research group: Fluid power automation in mobile machines, Department of Electrical Engineering, Research area: Reliability
Contributors: Ojala, P., Saarenrinne, P., Miettinen, J., Multanen, P., Kiilunen, J., Hietala, J., Kolu, A., Pippola, J., Mostofizadeh, M., Ylönen, M.
Number of pages: 4
Pages: 24-27
Publication date: 2015
Peer-reviewed: Unknown

Publication information

Journal: Promaint
Volume: 2
ISSN (Print): 1797-2000
Original language: Finnish

Bibliographical note

ORG=mol,0.25
ORG=mei,0.25
ORG=iha,0.25
ORG=dee,0.25

Research output: Contribution to journalArticleProfessional

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

Modelling of seep through of humidity to electric connector with stochastic processes

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Materials Science, Research group: Tribology and Machine Elements, Automation and Hydraulic Engineering, Research group: Autonomous heavy duty vehicles, Sandvik Mining and Construction Oy
Contributors: Ojala, P., Hietala, J., Miettinen, J., Julkunen, P., Nieminen, I.
Publication date: 2017

Host publication information

Title of host publication: ESREL 2017. Safety and Reliability. Theory and Applications
Publisher: CRC Press
Editors: Cepin, M., Bris, R.
ISBN (Print): 978-1-138-62937-0
ISBN (Electronic): 978-1-351-80973-3

Bibliographical note

EXT="Julkunen, Pasi"

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

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

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

Metals removal and recovery in bioelectrochemical systems: A review

Metal laden wastes and contamination pose a threat to ecosystem well being and human health. Metal containing waste streams are also a valuable resource for recovery of precious and scarce elements. Although biological methods are inexpensive and effective for treating metal wastewaters and in situ bioremediation of metal(loid) contamination, little progress has been made towards metal(loid) recovery. Bioelectrochemical systems are emerging as a new technology platform for removal and recovery of metal ions from metallurgical wastes, process streams and wastewaters. Biodegradation of organic matter by electroactive biofilms at the anode has been successfully coupled to cathodic reduction of metal ions. Until now, leaching of Co(II) from LiCoO<inf>2</inf> particles, and removal of metal ions i.e. Co(III/II), Cr(VI), Cu(II), Hg(II), Ag(I), Se(IV), and Cd(II) from aqueous solutions has been demonstrated. This article reviews the state of art research of bioelectrochemical systems for removal and recovery of metal(loid) ions and pertaining removal mechanisms.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Urban circular bioeconomy (UrCirBio), CSIR-Indian Institute of Chemical Technology, Bhabha Atomic Research Centre
Contributors: Nancharaiah, Y. V., Venkata Mohan, S., Lens, P.
Number of pages: 13
Pages: 102-114
Publication date: 2015
Peer-reviewed: Yes
Early online date: 17 Jun 2015

Publication information

Journal: Bioresource Technology
Volume: 195
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: Bioelectrochemical treatment (BET), Biorecovery, Heavy metals, Microbial fuel cells, Wastewater treatment
Source: Scopus
Source ID: 84945442633

Research output: Contribution to journalReview ArticleScientificpeer-review

Recent advances in nutrient removal and recovery in biological and bioelectrochemical systems

Nitrogen and phosphorous are key pollutants in wastewater to be removed and recovered for sustainable development. Traditionally, nitrogen removal is practiced through energy intensive biological nitrification and denitrification entailing a major cost in wastewater treatment. Recent innovations in nitrogen removal aim at reducing energy requirements and recovering ammonium nitrogen. Bioelectrochemical systems (BES) are promising for recovering ammonium nitrogen from nitrogen rich waste streams (urine, digester liquor, swine liquor, and landfill leachate) profitably. Phosphorus is removed from the wastewater in the form of polyphosphate granules by polyphosphate accumulating organisms. Alternatively, phosphorous is removed/recovered as Fe-P or struvite through chemical precipitation (iron or magnesium dosing). In this article, recent advances in nutrients removal from wastewater coupled to recovery are presented by applying a waste biorefinery concept. Potential capabilities of BES in recovering nitrogen and phosphorous are reviewed to spur future investigations towards development of nutrient recovery biotechnologies.

General information

Publication status: Published
MoE publication type: A2 Review article in a scientific journal
Organisations: Department of Chemistry and Bioengineering
Contributors: Nancharaiah, Y. V., Venkata Mohan, S., Lens, P. N. L.
Pages: 173–185
Publication date: Sep 2016
Peer-reviewed: Yes

Publication information

Journal: Bioresource Technology
Volume: 215
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: Microbial fuel cells, Nitrogen removal, Phosphorus removal, Waste biorefinery, Wastewater
Source: Scopus
Source ID: 84962019395

Research output: Contribution to journalReview ArticleScientificpeer-review

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

Modeling of autonomous power systems - A mathematical model of a hybrid power system

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Energia- ja prosessitekniikka
Contributors: Mustonen, S., Nanthavong, K.
Pages: 6 p
Publication date: 2006

Host publication information

Title of host publication: Proceedings of the 2nd Joint International Conference on "Sustainable Energy and Environment (SEE 2006)" 21-23 November, 2006, Bangkok, Thailand

Bibliographical note

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

Source: researchoutputwizard
Source ID: 17171

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

Rural electrification of remote areas - Case studies of two renewable energy projects in Laos and The Philippines

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Energy and Process Engineering
Contributors: Mustonen, S.
Pages: 8 p
Publication date: 2008

Host publication information

Title of host publication: International Conference on Environment 2008 (ICENV 2008), 15-17 December, 2008, Penang, Malaysia

Bibliographical note

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

Source: researchoutputwizard
Source ID: 13098

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

Rural energy survey and scenario analysis of village energy consumption: A case study in Lao People’s Democratic Republic

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Mustonen, S. M.
Pages: 1040-1048
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Energy Policy
Volume: 38
Issue number: 2
ISSN (Print): 0301-4215
Ratings: 
  • Scopus rating (2010): SJR 1.478 SNIP 1.844
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 8824

Research output: Contribution to journalArticleScientificpeer-review

Waste water treatment by multi-stage biofilm processes : Results of the VESITURVA project

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Chemistry and Bioengineering
Contributors: Mononen, T., Coloma, S., Romantschuk, M., Vikman, M., Kapanen, A., Lehtonen, A., Saario, E., Itävaara, M., Malinen, E., Kostia, S., Tuhkanen, T.
Number of pages: 74
Publication date: 2013

Publication information

Place of publication: Espoo
Publisher: VALTION TEKNILLINEN TUTKIMUSKESKUS
ISBN (Print): 978-951-38-7991-4
ISBN (Electronic): 978-951-38-7992-1
Original language: English

Publication series

Name: VTT Technology
Publisher: Valtion teknillinen tutkimuskeskus
No.: 98
ISSN (Print): 2242-1211
ISSN (Electronic): 2242-122X

Bibliographical note

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

Source: researchoutputwizard
Source ID: 2936

Research output: Book/ReportCommissioned reportProfessional

Stabilization of fine fraction from landfill mining in leach bed reactor

General information

Publication status: Published
MoE publication type: B3 Non-refereed article in conference proceedings
Organisations: Department of Chemistry and Bioengineering, Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Mönkäre, T., Palmroth, M., Rintala, J.
Number of pages: 11
Pages: 1-11
Publication date: 2014

Host publication information

Title of host publication: Proceedings SUM 2014, Second Symposium on Urban Mining, Bergamo, Italy, 19-21 May, 2014 : Organised by IWWG - International Waste Working Group
Publisher: CISA Publishers
ISBN (Print): 978-88-6265-031-1

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-06-27<br/>Publisher name: CISA Publishers

Source: researchoutputwizard
Source ID: 1097

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

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

Stabilization of fine fraction from landfill mining in anaerobic and aerobic laboratory leach bed reactors

Fine fraction (FF, <20mm) from mined landfill was stabilized in four laboratory-scale leach bed reactors (LBR) over 180days. The aim was to study feasibility of biotechnological methods to treat FF and if further stabilization of FF is possible. Four different stabilization methods were compared and their effects upon quality of FF were evaluated. Also during the stabilization experiment, leachate quality as well as gas composition and quantity were analyzed. The methods studied included three anaerobic LBRs (one without water addition, one with water addition, and one with leachate recirculation) and one aerobic LBR (with water addition). During the experiment, the most methane was produced in anaerobic LBR without water addition (18.0LCH<inf>4</inf>/kgVS), while water addition and leachate recirculation depressed methane production slightly, to 16.1 and 16.4LCH<inf>4</inf>/kgVS, respectively. Organic matter was also removed via the leachate and was measured as chemical oxygen demand (COD). Calculated removal of organic matter in gas and leachate was highest in LBR with water addition (59gCOD/kgVS), compared with LBR without water addition or with leachate recirculation (51gCOD/kgVS). Concentrations of COD, ammonium nitrogen and anions in leachate decreased during the experiment, indicating washout mechanism caused by water additions. Aeration increased sulfate and nitrate concentrations in leachate due to oxidized sulfide and ammonium. Molecular weight distributions of leachates showed that all the size categories decreased, especially low molecular weight compounds, which were reduced the most. Aerobic stabilization resulted in the lowest final VS/TS (13.1%), lowest respiration activity (0.9-1.2mgO<inf>2</inf>/gTS), and lowest methane production after treatment (0.0-0.8LCH<inf>4</inf>/kgVS), with 29% of VS being removed from FF. Anaerobic stabilization methods also reduced organic matter by 9-20% compared with the initial amount. Stabilization reduced the quantity of soluble nitrogen in FF and did not alter concentration of soluble and insoluble phosphorus, and insoluble nitrogen. All four stabilization methods decreased organic matter and thus are possible stabilization methods for FF, but aerobic treatment was the most efficient in this study.

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: Mönkäre, T. J., Palmroth, M. R. T., Rintala, J. A.
Number of pages: 8
Pages: 468-475
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Waste Management
Volume: 45
ISSN (Print): 0956-053X
Ratings: 
  • Scopus rating (2015): CiteScore 6.3 SJR 1.732 SNIP 2.268
Original language: English
ASJC Scopus subject areas: Waste Management and Disposal
Keywords: Aerobic stabilization, Anaerobic stabilization, Fine fraction, Landfill mining, Leach bed reactor
Electronic versions: 
URLs: 
Source: Scopus
Source ID: 84945472197

Research output: Contribution to journalArticleScientificpeer-review

Ravinnevisio: Selvitys Pirkanmaan puhdistamolietteiden ja biojätteiden ravinteista ja niiden potentiaalisesta käytöstä

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Natural Resources Institute Finland (Luke)
Contributors: Mönkäre, T., Kinnunen, V., Tampio, E., Ervasti, S., Lehtonen, E., Kettunen, R., Rasi, S., Rintala, J.
Number of pages: 56
Publication date: Jun 2016

Publication information

Publisher: Pirkanmaan ELY-keskus
ISBN (Print): 978-952-314-489-7
Original language: Finnish

Publication series

Name: Raportteja
Publisher: Pirkanmaan ELY-keskus
No.: 74
ISSN (Electronic): 2242-2854

Research output: Book/ReportCommissioned reportProfessional

Screening biological methods for laboratory scale stabilization of fine fraction from landfill mining

Abstract Increasing interest for the landfill mining and the amount of fine fraction (FF) in landfills (40–70% (w/w) of landfill content) mean that sustainable treatment and utilization methods for FF are needed. For this study FF (<20 mm) was mined from a municipal solid waste (MSW) landfill operated from 1967 to 1989. FF, which resembles soil, was stabilized in laboratory scale reactors in two phases: first, anaerobically for 101 days and second, for 72 days using four different methods: anaerobic with the addition of moisture (water) or inoculum (sewage sludge) and aerobic with continuous water washing, with, or without, bulking material. The aim was to evaluate the effect on the stability of mined FF, which has been rarely reported, and to study the quality and quantity of gas and leachate produced during the stabilization experiment. The study showed that aerobic treatment reduced respiration activity (final values 0.9–1.1 mg O2/g TS) and residual methane potential (1.1 L CH4/kg TS) better than anaerobic methods (1.8–2.3 mg O2/g TS and 1.3–2.4 L CH4/kg TS, respectively). Bulking material mixed in FF in one aerobic reactor had no effect on the stability of FF. The benefit of anaerobic treatment was the production of methane, which could be utilized as energy. Even though the inoculum addition increased methane production from FF about 30%, but the methane production was still relatively low (in total 1.5–1.7 L CH4/kg TS). Continuous water washing was essential to remove leachable organic matter and soluble nutrients from FF, while increasing the volume of leachate collected. In the aerobic treatment, nitrogen was oxidized into nitrite and nitrate and then washed out in the leachate. Both anaerobic and aerobic methods could be used for FF stabilization. The use of FF, in landscaping for example, is possible because its nutrient content (4 g N/kg TS and 1 g P/kg TS) can increase the nutrient content of soil, but this may have limitations due to the possible presence of heavy metal and other contaminants.

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: 9
Pages: 739-747
Publication date: 2017
Peer-reviewed: Yes
Early online date: 16 Nov 2016

Publication information

Journal: Waste Management
Volume: 60
ISSN (Print): 0956-053X
Ratings: 
  • Scopus rating (2017): CiteScore 7 SJR 1.456 SNIP 2.14
Original language: English
Keywords: Aerobic stabilization, Anaerobic stabilization, Fine fraction, Landfill mining, Leachate
Electronic versions: 
URLs: 
Source: RIS
Source ID: urn:592197DDB3F400BDF07AF04E54A2897D

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

Scaling up the treatment of the fine fraction from landfill mining: Mass balance and cost structure

The treatment of the fine fraction (FF) obtained from landfill mining is necessary in order to reduce the amount of organic matter and biological activity in FF, thus increasing its potential to be utilized after landfill mining. This paper suggests the scaled up anaerobic and aerobic treatment of FF, with or without continuous irrigation, and presents the mass balance and cost structure of such treatment based on two hypothetical landfills. The physical treatment structure for the treatment of FF should prevent emissions, and in this paper, it includes suitable bottom and top liners as well as the collection and treatment of the gaseous and leachate emissions formed during the treatment. Methane produced in anaerobic treatments could either be utilized for energy recovery or be flared. The cost of the anaerobic and aerobic treatment of FF, including investments and operation costs, are 20–65 €/t FF, depending on size of the landfill. The costs of anaerobic treatment and passive aeration are similar, and active aeration is slightly more expensive, but the cost of the continuous irrigation is the most significant, as it multiplies the leachate treatment costs. The overall cost of treatment could be lowered by reducing the treatment time and utilizing existing landfill structures. The results of this paper can be used in planning and estimating the cost of the biological treatment of FF when evaluating landfill mining projects, as the fate of FF may have a major impact on the economics of landfill mining projects.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Bio- and Circular Economy, Materials Science and Environmental Engineering, Mustankorkea Ltd. Waste Management Company
Contributors: Mönkäre, T., Palmroth, M. R., Sormunen, K., Rintala, J.
Number of pages: 8
Pages: 464-471
Publication date: 15 Mar 2019
Peer-reviewed: Yes

Publication information

Journal: Waste Management
Volume: 87
ISSN (Print): 0956-053X
Ratings: 
  • Scopus rating (2019): CiteScore 9.6 SJR 1.634 SNIP 2.106
Original language: English
ASJC Scopus subject areas: Waste Management and Disposal
Keywords: Biological treatment, Cost structure, Fine fraction, Landfill mining, Mass balance
Source: Scopus
Source ID: 85061658603

Research output: Contribution to journalArticleScientificpeer-review

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

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

Rakennusten energiankulutuksen perusskenaario Suomessa 2015-2050

Ilmaston lämpenemistä aiheuttavista kasvihuonekaasupäästöistä noin 80 % on peräisin energian tuotannosta ja kulutuksesta (ml. liikenne), mikä tarkoittaa, että energia- ja ilmastopolitiikka ovat tiivis kokonaisuus. Vuonna 2016 Suomessa valmisteltiin uutta energia- ja ilmastostrategiaa, johon kuuluu myös skenaarioiden valmistelu. Tässä raportissa esitetty työ tukee strategian valmistelutyötä. Raportti jakaantuu kahteen osaan: rakennuskannan energiankäytön ennustamiseen ja puun pienpolton lisäämisen tarkasteluihin. Työssä tehtiin rakennustyypeittäin perusskenaarion mukainen tarkastelu, joka jatkaa tulevaisuuteen energiatilastojen lukuja vuodesta 2015 aina vuoteen 2050. Perusskenaariolla arvioidaan jo päätettyjen ja toimeenpantujen politiikkatoimien vaikutusta tulevaisuuden kehitykseen. Rakennuskannan energiankäytön osalta tehtiin ennuste peruskehityksestä ja lisäksi matalamman talouskasvun ennuste. Energiankulutus on esitetty sekä hankitun energian tasolla että hyötyenergiana. Varsinaisten asuinrakennusten (pientalot, rivi- ja ketjutalot, asuinkerrostalot) hankitun energian määrässä on pieni laskeva trendi, mutta energiantarve pysyy oleellisesti samalla tasolla tarkasteluajanjaksolla. Aurinkolämmön kehitykselle muodostettiin maltillinen lineaariseen kasvuun perustuva ennuste. Toiseksi työssä tarkasteltiin puun pienpolton lisäämisestä aiheutuvia pienhiukkaspäästöjä ja niiden vaikutusta väestöaltistukseen. Laskentaesimerkin perusteella voidaan todeta, että myös modernien, verrattain vähäpäästöisten varaavien takkojen kasvava käyttö lisää hengitysilman pienhiukkaspitoisuuksia.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Civil Engineering, Research group: Real estate development
Contributors: Mattinen, M., Heljo, J., Savolahti, M.
Number of pages: 66
Publication date: 13 Sep 2016

Publication information

Place of publication: Helsinki
Publisher: Suomen ympäristökeskus
ISBN (Electronic): 978-952-11-4644-2
Original language: Finnish

Publication series

Name: Suomen ympäristökeskuksen raportteja
Publisher: Suomen ympäristökeskus
No.: 35/2016
ISSN (Electronic): 1796-1726
Keywords: rakennuskanta, energiankulutus, skenaario, pienhiukkaset, päästöt, strategiatyö

Research output: Book/ReportCommissioned reportProfessional

Modeling of Finnish building sector energy consumption and greenhouse gas emission: specification of POLIREM policy scenario model

Monitoring needs have increased in recent years, and answers to various questions related to the energy use of the building stock are needed faster than before. POLIREM model is a calculation model that assesses the effect of different policy scenarios on the Finnish building stock. The model determines the energy consumption and greenhouse gas emissions, and its purpose is to assist in the reporting and scenario work. The model has a strong linkage with the statistical data, and a top-down approach, which makes the POLIREM different from previous bottom-up style building stock models.

The POLIREM model was originally developed at the Tampere University of Technology in MS excel environment. In this work, the model was converted into a coded version that ensures flexible scenario building, including ease of updating the input data, as well as enabling further integration of new features and/or data sources. This report provides a technical specification of the python-coded scenario model POLIREM.

This report is part of development work to establish national reporting system/evaluation scheme, and fulfils requirements for openness by describing transparently the used evaluation method for building
stock modelling.

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Civil Engineering, Research group: Real estate development, Finnish Environment Institute
Contributors: Mattinen, M., Heljo, J.
Number of pages: 23
Publication date: 2016

Publication information

Publisher: Suomen ympäristökeskus
ISBN (Electronic): 978-952-11-4576-6
Original language: English

Publication series

Name: Reports of the Finnish Environment Institute
Publisher: Finnish Environment Institute
No.: 26/2016
ISSN (Electronic): 1796-1726
Keywords: modelling, building stock, Energy consumption, Scenarios, climate policy, environmental reporting, Greenhouse gases, EMISSIONS

Research output: Book/ReportCommissioned reportProfessional

Simultaneous nutrient removal and lipid production with Chlorella vulgaris on sterilized and non-sterilized anaerobically pretreated piggery wastewater

Piggery wastewater is a potent nutrient source for microalgal lipid production. Wastewater has been usually sterilized when used for microalgal cultivation. This is uneconomical in large-scale applications. Therefore, lipid productivity of Chlorella vulgaris CY5 using sterilized and non-sterilized diluted anaerobically pretreated piggery wastewater was studied in batch reactors. The maximum average lipid productivity was obtained after 12 days of incubation and it was higher with the sterilized wastewater than with the non-sterilized one (117g/L/d vs. 91.3g/L/d), due to the higher biomass concentration. Because of the unexpected increase of dissolved organic carbon (DOC) in the cultures, second experiment was conducted to characterize the composition of produced DOC in non-sterilized wastewater. Carbohydrate content increased in the liquid phase but decreased in the biomass after nitrogen had been exhausted. After 12 days of incubation, soluble chemical oxygen demand (COD<inf>s</inf>) was 414±56mg/L, biomass production was 2.8±0.15g/L, and lipid content was 30.3±1.2wt%. Average lipid productivity from day zero to day 12 was 70.5±1.1g/L/d. C. vulgaris removed nutrients from the non-sterilized wastewater and produced oleaginous biomass, although the lipid productivity was higher with sterilized wastewater.

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), Center of Bioscience and Biotechnology, Research Center for Energy Technology and Strategy, National Cheng Kung University, Department of Environmental Engineering, Department of Chemical Engineering
Contributors: Marjakangas, J. M., Chen, C. Y., Lakaniemi, A. M., Puhakka, J. A., Whang, L. M., Chang, J. S.
Number of pages: 8
Pages: 177-184
Publication date: 5 Nov 2015
Peer-reviewed: Yes
Early online date: 23 Jul 2015

Publication information

Journal: Biochemical Engineering Journal
Volume: 103
ISSN (Print): 1369-703X
Ratings: 
  • Scopus rating (2015): CiteScore 4.6 SJR 0.952 SNIP 1.075
Original language: English
ASJC Scopus subject areas: Biotechnology, Bioengineering, Biomedical Engineering, Environmental Engineering
Keywords: Aerobic process, Lipid production, Microalgae, Piggery wastewater, Sterilization, Wastewater treatment
Source: Scopus
Source ID: 84939202209

Research output: Contribution to journalArticleScientificpeer-review

Selecting an indigenous microalgal strain for lipid production in anaerobically treated piggery wastewater

The aim of this study was to select a potential microalgal strain for lipid production and to examine the suitability of anaerobically treated piggery wastewater as a nutrient source for production of lipid-rich biomass with the selected microalga. Biomass and lipid productivity of three microalgal strains (Chlorella sorokiniana CY1, Chlorella vulgaris CY5 and Chlamydomonas sp. JSC-04) were compared by using different media, nitrogen sources, and nitrogen concentrations. The highest lipid content and productivity (62.5 wt%, 162 mg/L/d) were obtained with C. vulgaris with BG-11 with 62 mg N/L. Secondly, C. vulgaris was cultivated in sterilized, diluted (1–20×), anaerobically treated piggery wastewater. Biomass production decreased and lipid content increased, when wastewater was more diluted. The highest lipid content of 54.7 wt% was obtained with 20× dilution, while the highest lipid productivity of 100.7 mg/L/d with 5× dilution. Piggery wastewater is a promising resource for mass production of oleaginous microalgal biomass.

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: Marjakangas, J. M., Chen, C., Lakaniemi, A., Puhakka, J. A., Whang, L., Chang, J.
Number of pages: 8
Pages: 369-376
Publication date: Sep 2015
Peer-reviewed: Yes

Publication information

Journal: Bioresource Technology
Volume: 191
ISSN (Print): 0960-8524
Ratings: 
  • Scopus rating (2015): CiteScore 9.2 SJR 2.243 SNIP 1.899
Original language: English
Keywords: Lipid production, Chlorella vulgaris, Piggery wastewater
Source: RIS
Source ID: urn:99005CD93E391712ED9AA9AF768F175C

Research output: Contribution to journalArticleScientificpeer-review

Production of Oleaginous Microbial Biomass by Reusing Wastewaters

Global energy demand continues to increase, which raises the question regarding how to solve the energy crisis caused by diminishing fossil fuels. There is no single alternative energy source that could substitute the fossil fuels, but microbial single cell oils (SCO) could be part of the solution. SCOs can be produced by cultivating microorganisms in wastewater in which nutrients and carbon from the wastewater are used for biomass production. In optimized conditions, microorganisms begin to accumulate lipids, and these lipids can be further refined for the production of biodiesel or renewable diesel. The lipid accumulation of the microorganisms may be enhanced by culturing the microorganisms under stressful conditions. The most commonly used strategy for enhancing lipid accumulation is nitrogen starvation, but it is even more effective when combined with another stress factor, such as moderately increased salinity. In microbial lipid production, the major cost factor is often the substrate needed for the microorganisms. Therefore, utilizing inexpensive substrates and waste materials for the cultivation of oleaginous microorganisms is very desirable. Various wastewaters from municipalities, agriculture, and industrial sources have been studied, and many of these wastewaters have shown the potential for lipid-rich biomass production. Unfortunately, most of the studies have been conducted using sterilized wastewater. In large-scale applications, the sterilization of the wastewater is not cost-effective; therefore, lipid-accumulating microorganisms able to compete with the indigenous microorganisms of the wastewater need to be further studied. The aim of this work was to sustainably produce oleaginous biomass by reusing the carbon and nutrients from wastewaters. This work included an evaluation of the suitability of various wastewaters for lipid-lipid rich biomass production (Paper I), the isolation of yeasts and fungi, which could possibly accumulate lipids by utilizing wastewater as substrate (Paper II), and the determination of the ability of the isolated microorganisms to accumulate lipids by comparing them with known lipid accumulating yeasts (Paper II). Unlike yeasts and fungi, microalgae are able to use an inorganic carbon source for their growth. This feature enables the combination of wastewater and flue gas treatment. Therefore, the growth and lipid accumulation of three microalgal species were compared (Paper III), and the suitability of the most potential microalgal species for accumulating lipids in sterilized and non-sterilized wastewater was studied (Paper III & IV). Based on the results of this study, palm oil mill effluent (POME) has more potential for lipid production than chemithermomechanical pulp mill effluent (CTMP) or municipal wastewate r (MWW) (Paper I). The residual lipids and solids of POME obstructed the analyses of the microbial SCOs. Eukaryotes isolated from POME with agar plates were genetically identified as Candida silvae NRRL Y-6725 (with 100% similarity), Galactomyces geotrichum LMA-20 (with 99.8% similarity), Lecythophora hoffmannii CBS245.38T (with 96.7% similarity), and Graphium penicillioides JCM9300 (with 99.3% similarity) (Paper II). The fungus Graphium penicillioides had a great potential for lipid accumulation based on the comparison study with well-known oleaginous yeast strains (Yarrowia lipolytica DSMZ8212, Cryptococcus curvatus DSMZ70022, & Cryptococcus albidus DSMZ701097) in a synthetic medium (Paper II). The lipid content per dry weight was higher with G. penicillioides compared to C. curvatus after 15 days of incubation (29.1±3.0 wt% vs 20.2±2.9 wt%, Paper II). Unfortunately, the overall lipid concentration was lower due to a lower biomass concentration. G. penicillioides contained more than 20% lipids, so it can be called oleaginous. From the three microalgae isolated from a Taiwanese freshwater area (Chlorella sorokiniana CY1, Chlorella vulgaris CY5, & Chlamydomonas sp. JSC-04), C. vulgaris accumulated more lipids when various media, nitrogen sources, and nitrogen concentrations were studied (Paper III). The C. vulgaris in the BG-11 medium, initially containing 0.38 g NaNO3/L, produced 3.8 g/L biomass and 57.5 wt% lipids after 12 days of incubation. The most suitable wastewater dilution for the lipid accumulation of C. vulgaris on sterilized anaerobically treated piggery wastewater was 5x dilution, which resulted in initial chemical oxygen demand and total Kjeldahl nitrogen of 75.4 mg/L and 57.4 mg/L, respectively. C. vulgaris was suitable for accumulating lipids on both sterilized and non-sterilized anaerobically treated piggery wastewater (PW) (Paper IV). The highest lipid content and productivity with the non-sterilized wastewater were rather promising (32.5±3.2 wt%, 71.2±2.2 g/L/d). However, under the conditions of these experiments, C. vulgaris excreted dissolved organic carbon (Paper III & IV), and the aim in wastewater treatment is the removal of organic carbon. In summary, this work demonstrates the potential of indigenous eukaryotic microorganisms for lipid-rich biomass production. G. penicillioides isolated from POME has the potential for lipid-rich biomass production in a synthetic medium, which has not been previously reported. Similarly, C. vulgaris has the potential for lipid-rich biomass production in non-sterilized piggery wastewater, while most of the studies in the literature on C. vulgaris and wastewater have been conducted using sterilized wastewater. To enable simultaneous accumulation of lipids and efficient treatment of wastewater, special attention should be focused on the growth conditions.

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: Marjakangas, J.
Number of pages: 58
Publication date: 28 Nov 2015

Publication information

Publisher: Tampere University of Technology
ISBN (Print): 978-952-15-3631-1
ISBN (Electronic): 978-952-15-3632-8
Original language: English

Publication series

Name: Tampere University of Technology. Publication
Publisher: Tampere University of Technology
Volume: 1348
ISSN (Print): 1459-2045

Bibliographical note

Awarding institution:Tampere University of Technology

Research output: Book/ReportDoctoral thesisCollection of Articles

Sisäympäristön laadun ja terveellisyyden arviointi energiaparannuskohteissa

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, Natl Inst Hlth & Welf, Finland National Institute for Health & Welfare, Dept Environm Hlth
Contributors: Mari, T., Leivo, V., Pekkonen, M., Aaltonen, A., Kiviste, M., Haverinen-Shaughnessy, U.
Number of pages: 6
Pages: 13-18
Publication date: 16 Mar 2016

Host publication information

Title of host publication: Sisäilmastoseminaari 2016, Sisäilmayhdistys raportti 34
Publisher: SIY SISÄILMATIETO OY
ISBN (Print): 978-952-5236-44-6

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

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

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

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

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

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
Contributors: Mäkinen, J., Mela, H.
Number of pages: 4
Publication date: 28 Nov 2019

Publication information

Place of publication: Helsinki
Publisher: Suomen ympäristökeskus (SYKE)
ISBN (Electronic): 978-952-11-5114-9
Original language: Finnish

Research output: Book/ReportCommissioned reportProfessional

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

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

Methane oxidation potential of boreal landfill cover materials: The governing factors and enhancement by nutrient manipulation

Methanotrophs inhabiting landfill covers are in a crucial role in mitigating CH4 emissions, but the characteristics of the cover material or ambient temperature do not always enable the maximal CH4 oxidation potential (MOP). This study aimed at identifying the factors governing MOPs of different materials used for constructing biocovers and other cover structures. We also tested whether the activity of methanotrophs could be enhanced at cold temperature (4 and 12 °C) by improving the nutrient content (NO3-, PO43-, trace elements) of the cover material. Compost samples from biocovers designed to support CH4 oxidation were exhibiting the highest MOPs (4.16 µmol CH4 gdw-1 h-1), but also the soil samples collected from other cover structures were oxidising CH4 (0.41 µmol CH4 gdw-1 h-1). The best predictors for the MOPs were the NO3- content and activity of heterotrophic bacteria at 72.8 %, which were higher in the compost samples than in the soil samples. The depletion of NO3- from the landfill cover material limiting the activity of methanotrophs could not be confirmed by the nutrient manipulation assay at 4 °C as the addition of nitrogen decreased the MOPs from 0.090 µmol CH4 gdw-1 h-1 to < 0.085 µmol CH4 gdw-1 h-1. At 12 °C, all nutrient additions reduced the MOPs. The inhibition was believed to result from high ionic concentration caused by nutrient addition. At 4 °C, the addition of trace elements increased the MOPs (> 0.096 µmol CH4 gdw-1 h-1) suggesting that this was attributable to stimulation of the enzymatic activity of the psychrotolerant methanotrophs.

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: Maanoja, S. T., Rintala, J. A.
Number of pages: 9
Pages: 399-407
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Waste Management
Volume: 46
ISSN (Print): 0956-053X
Ratings: 
  • Scopus rating (2015): CiteScore 6.3 SJR 1.732 SNIP 2.268
Original language: English
Keywords: Greenhouse gases, Landfill, Cover material, Methane oxidation, Nutrients

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

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

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

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

Sleepers

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

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

Tutkimusohjelma Elinkaaritehokas RAta (TERA): Kokonaisvaltainen ote ratarakennetutkimukseen

General information

Publication status: Published
Organisations: Civil Engineering, Research group: Track Structures
Contributors: Luomala, H.
Publication date: 15 Nov 2016

Publication information

Media of output: Rakennustekniikan vuosiseminaari 2016
Year: 2016
Original language: Finnish

Research output: Other contributionScientific

The effect of anode potential on bioelectrochemical and electrochemical tetrathionate degradation

The effect of poised anode potential on electricity production and tetrathionate degradation was studied in two-chamber flow-through electrochemical (ES) and bioelectrochemical systems (BES). The minimum anode potential (vs. Ag/AgCl) for positive current generation was 0.3 V in BES and 0.5 V in the abiotic ES. The anode potential required to obtain average current density above 70 mA m-2 was 0.4 V in BES and above 0.7 V in ES. ES provided higher coulombic efficiency, but the average tetrathionate degradation rate remained significantly higher in BES (above 110 mg L-1 d-1) than in the abiotic ES (below 35 mg L-1 d-1). This study shows that at anode potentials below 0.7 V, the electrochemical tetrathionate degradation is only efficient with microbial catalyst and that significantly higher tetrathionate degradation rates can be obtained with bioelectrochemical systems than with electrochemical systems at the tested anode potentials.

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: L.K. Sulonen, M., Lakaniemi, A., Kokko, M. E., Puhakka, J. A.
Number of pages: 8
Pages: 173-180
Publication date: Feb 2017
Peer-reviewed: Yes
Early online date: 8 Dec 2016

Publication information

Journal: Bioresource Technology
Volume: 226
ISSN (Print): 0960-8524
Ratings: 
  • Scopus rating (2017): CiteScore 10 SJR 2.029 SNIP 1.84
Original language: English
Keywords: Bioelectrochemical cell, Electrochemical cell, Tetrathionate, Anode potential, Current generation
Electronic versions: 
URLs: 
Source: RIS
Source ID: urn:6A72F358ABAE0BB9DC836F7776FCED75

Research output: Contribution to journalArticleScientificpeer-review

Liikenteen päästötavoitteiden saavuttaminen 2030 - politiikkatoimenpiteiden tarkastelu

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Civil Engineering
Contributors: Liimatainen, H., Viri, R.
Publication date: 30 May 2017

Publication information

Publisher: Suomen ilmastopaneeli
Original language: Finnish

Research output: Book/ReportCommissioned reportProfessional

Yli 60 tonnin yhdistelmät parantaneet kuljetusten tehokkuutta

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Civil Engineering
Contributors: Liimatainen, H.
Pages: 30-32
Publication date: 4 Sep 2017
Peer-reviewed: Unknown

Publication information

Journal: Tie ja Liikenne
Volume: 2017
Issue number: 4
ISSN (Print): 0355-7855
Original language: Finnish

Research output: Contribution to journalArticleProfessional

Possible Impact of Long and Heavy Vehicles in the United Kingdom—A Commodity Level Approach

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Heriot-Watt University
Contributors: Liimatainen, H., Greening, P., Dadhich, P., Keyes, A.
Number of pages: 19
Publication date: 4 Aug 2018
Peer-reviewed: Yes

Publication information

Journal: Sustainability
Volume: 10
Issue number: 8
ISSN (Print): 2071-1050
Ratings: 
  • Scopus rating (2018): CiteScore 2.8 SJR 0.549 SNIP 1.201
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Sähköautoilun edistäminen vaatii latausmahdollisuuksien kehittämistä

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
Contributors: Liimatainen, H., Utriainen, R., Viri, R.
Number of pages: 7
Publication date: 29 Aug 2018

Publication information

Publisher: Suomen ilmastopaneeli
Original language: Finnish

Research output: Book/ReportCommissioned reportProfessional

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

The potential of electric trucks – An international commodity-level analysis

Development of battery technology is making battery electric heavy duty trucks technically and commercially viable and several manufacturers have introduced battery electric trucks recently. However, the national and sectoral differences in freight transport operations affect the viability of electric trucks. The aim of this paper is to develop a methodology for estimating the potential of electric trucks and demonstrate the results in Switzerland and Finland. Commodity-level analysis of the continuous road freight survey data were carried out in both countries. As much as 71% of Swiss road freight transport tonne-kilometers may be electrified using battery electric trucks but Finland has very limited potential of 35%, due to the use of long and heavy truck-trailer combinations. Within both countries the electrification potential varies considerably between commodities, although in Finland more so than in Switzerland. Commodities which are constrained by payload volume rather than weight and are to large extent carried using medium duty or <26t rigid trucks trucks seem to provide high potential for electrification even with the current technology. Electric trucks increase the annual electricity consumption by only 1–3%, but truck charging is likely to have a large impact on local grids near logistics centres and rest stations along major roads. A spatial analysis by routing the trips reported in the datasets used in this study should be carried out. Future research should also include comparison between the alternate ways of electrifying road freight transport, i.e. batteries with charging, batteries with battery swapping and electrified road systems.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Transport Research Centre Verne, Civil Engineering, HCI e 486.1
Contributors: Liimatainen, H., van Vliet, O., Aplyn, D.
Number of pages: 11
Pages: 804-814
Publication date: 15 Feb 2019
Peer-reviewed: Yes
Early online date: 14 Dec 2018

Publication information

Journal: Applied Energy
Volume: 236
ISSN (Print): 0306-2619
Ratings: 
  • Scopus rating (2019): CiteScore 16.4 SJR 3.607 SNIP 2.865
Original language: English
ASJC Scopus subject areas: Building and Construction, Energy(all), Mechanical Engineering, Management, Monitoring, Policy and Law
Keywords: Charging infrastructure, Electric trucks, Logistics, Road freight transport
Electronic versions: 
Source: Scopus
Source ID: 85058374379

Research output: Contribution to journalArticleScientificpeer-review

Measures for Energy Efficient and Low Emission Private Mobility

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Civil Engineering, Research group: Transport Research Centre Verne
Contributors: Liimatainen, H.
Publication date: 2020

Host publication information

Title of host publication: Affordable and Clean Energy. Encyclopedia of the UN Sustainable Development Goals.
Publisher: Springer
ISBN (Electronic): 978-3-319-71057-0

Publication series

Name: Encyclopedia of the UN Sustainable Development Goals
ISSN (Electronic): 2523-7403

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

Study of Aerosols of Black Liquor Combustion

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.
Number of pages: 11
Pages: 1-11
Publication date: 2011

Host publication information

Title of host publication: 11th International Conference on Energy for Clean Environment, 5-8 July 2011, Lisbon Portugal
Place of publication: Lisbon
Publisher: Clean Air conference series

Publication series

Name: International Conference on Energy for Clean Environment
Publisher: Clean Air conference series

Bibliographical note

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

Source: researchoutputwizard
Source ID: 6600

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

Modeling of Fine Particles and Alkali Metal Compounds in Kraft Recovery Boiler Furnace

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)
Contributors: Leppänen, A., Välimäki, E., Oksanen, A.
Number of pages: 8
Pages: 1-8
Publication date: 2011

Host publication information

Title of host publication: The 2011 TAPPI PEERS Conference, 2-5 October 2011, Oregon Convention Center in Portland, Oregon USA
Place of publication: Norcross, GA
Publisher: TAPPI

Publication series

Name: TAPPI PEERS Conference
Publisher: TAPPI

Bibliographical note

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

Source: researchoutputwizard
Source ID: 6599

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

Modeling fine particles and alkali metal compound behavior in a kraft recovery boiler

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering, Research group: Power Plant and Combustion Technology, Urban circular bioeconomy (UrCirBio), Valmet Technologies Oy
Contributors: Leppänen, A., Välimäki, E., Oksanen, A.
Number of pages: 6
Pages: 9-14
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: TAPPI Journal
Volume: 11
Issue number: 7
ISSN (Print): 0734-1415
Ratings: 
  • Scopus rating (2012): SJR 0.331 SNIP 0.741
Original language: English

Bibliographical note

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

Source: researchoutputwizard
Source ID: 4694

Research output: Contribution to journalArticleScientificpeer-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

Numerical modeling of fine particle and deposit formation in a recovery boiler

In kraft pulp mills, black liquor is concentrated and burned in recovery boilers to produce steam and power and to recover pulping chemicals. Black liquor contains a large amount of alkali compounds, which form ash with low melting temperatures upon combustion. This causes many problems in recovery boiler operation, including fouling of the heat transfer surfaces, plugging of the flue gas passages, reduction of the heat transfer rate, and corrosion of the superheater tubes. This paper presents a model for simulating fine fume particles formed as a result of condensation of alkali compound vapors in the recovery boiler. The modeling method combines CFD modeling, equilibrium chemistry, and fine particle dynamics in a way that enables simulation of a full scale three-dimensional boiler environment. The model has been partially validated with measurements performed in an operating recovery boiler. The modeling results, particularly for the fume particle composition, agree well with the actual measurements. (C) 2014 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: Power Plant and Combustion Technology, Urban circular bioeconomy (UrCirBio), University of Toronto, Canada, VTT Technical Research Centre of Finland, Valmet Technologies Oy
Contributors: Leppänen, A., Tran, H., Taipale, R., Välimäki, E., Oksanen, A.
Number of pages: 9
Pages: 45-53
Publication date: 1 Aug 2014
Peer-reviewed: Yes
Early online date: 16 Apr 2014

Publication information

Journal: Fuel
Volume: 129
ISSN (Print): 0016-2361
Ratings: 
  • Scopus rating (2014): CiteScore 5.6 SJR 1.634 SNIP 2.29
Original language: English
Keywords: Kraft recovery boiler, Alkali metal, Fine particle, Deposition, Computational fluid dynamics, FUME FORMATION, BLACK LIQUOR, COMBUSTION, BEHAVIOR, DUST

Bibliographical note

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

Source: researchoutputwizard
Source ID: 922

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

Modelling fume deposit growth in recovery boilers: effect of flue gas and deposit temperature

The high ash content of black liquor causes fouling problems in the Kraft recovery boiler. The ash-forming elements condense into submicron-sized fume particles in the superheater area and the boiler bank and can deposit on heat-transfer surfaces. The fume deposits can then lower heat-transfer rate, plug flue gas flow, and expose surfaces to corrosion. This paper presents the results of a sensitivity analysis obtained using a CFD (computational fluid dynamics)-based sub-model of the formation of fume particles and deposits, showing how flue gas and deposit surface temperatures affect instantaneous fume deposit growth. The results indicate that fume deposit growth is a self-limiting process because the growth rate decreases as the deposit surface temperature increases. On the other hand, increasing the flue gas temperature increases the fume deposition rate when the element release factors are kept constant.

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, University of Toronto, Canada, Valmet Technologies Oy
Contributors: Leppänen, A., Tran, H., Välimäki, E., Oksanen, A.
Number of pages: 8
Pages: 50-57
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Journal of Science and Technology for Forest Products and Processes
Volume: 4
Issue number: 1
ISSN (Print): 1927-6311
Ratings: 
  • Scopus rating (2014): SJR 0.239 SNIP 0.28
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-12-12<br/>Publisher name: PAPTAC, Pulp and Paper Technical Association of Canada

Source: researchoutputwizard
Source ID: 924

Research output: Contribution to journalArticleScientificpeer-review

Liite 6: Yleistä kaivannaisjätealueista ja patoturvallisuudesta

General information

Publication status: Published
MoE publication type: D2 Article in professional manuals or guides or professional information systems or text book material
Organisations: Department of Civil Engineering, Research group: Earth Constructions
Contributors: Leppänen, M., Välisalo, T. (ed.), Laasonen, J.
Publication date: 2014

Host publication information

Title of host publication: Kaivosten stressitesti 2013
Publisher: Ympäristöministeriö
ISBN (Electronic): 978-952-11-4269-7

Publication series

Name: Ympäristöministeriön raportteja

Research output: Chapter in Book/Report/Conference proceedingChapterProfessional

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

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

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

Kokeellinen tutkimus savupiipun läpivientieristeen orgaanisen aineen palamisen vaikutuksesta paloturvallisuuteen

General information

Publication status: Published
MoE publication type: D3 Professional conference proceedings
Organisations: Civil Engineering, Research group: Responsible Construction
Contributors: Leppänen, P., Malaska, M.
Number of pages: 6
Pages: 15-20
Publication date: 29 Aug 2017

Host publication information

Title of host publication: Pelastustieto : Palotutkimuksen päivät 2017, erikoisnumero
Publisher: Palo- ja pelastustieto ry

Publication series

Name: Pelastustieto
ISSN (Print): 0031-0476

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

Technical suitability of the fine fraction of municipal solid waste incineration bottom ash to the landfill capping liner

To protect the natural aggregates and promote the circular economy the suitable secondary aggregates have been studied intensively in last decades in Finland. One promising secondary aggregate is bottom ash from the municipal solid waste incineration (MSWI) process.
The municipal incinerator bottom ash (MIBA, also called MSWI BA) contains heavy metals and other contaminants limiting its environmental acceptability. The fines contain typically the highest concentrations of contaminants. The portion of inert particles such as rock, glass and mineral waste is higher in coarser fractions.
The aim of the study was to assess the suitability of the fines of MIBA to the mineral liner in landfill capping. Based on the environmental permit, the target permeability value for capping liner is k ≤ 1 · 10-9 m/s. The permeability of the fines of MIBA is typically around 1 · 10-7 m/s when well compacted. In order to achieve the required permeability, bentonite or other additivies are needed. The grains are porous and the pH is high, typically 10-12, which effect on the amount of bentonite required. In addition, the MIBA contain high concentrations of diluting chlorides, sulfides and calcium, which decrease the swelling properties of the bentonite. The swelling capacity of bentonite decreases when permeating aggressive leakages with high cation concentration. Therefore a special polymer treated bentonite were chosen for the tests. The addition of superabsorbent polymers, which have much higher resistance to aggressive leakages, greatly improve the performance and self-healing capacity of bentonite.
First, laboratory tests were performed to estimate the proper amount and quality of the bentonite needed to achieve the permeability required. Two bentonite types were tested, the common natural bentonite and a special polymer modified bentonite produced by Cetco. The swelling index of both types of bentonite were tested by a eluate of MIBA. Several permeability tests were performed to evaluate the effect of dry density, bentonite quality and dose, and portion of coarser grains (2-5 mm).
After laboratory testing, a test area was constructed on an old waste fill to the Ämmässuo. During the construction, it was noticed that the water content effects significantly on the compaction result. The mineral liner was covered by a 1,5 mm thick LLDPE geomembrane and protective geotextile. The liner structure is covered only by a 0,5 m thick drainage layer from crushed rock. No surface layer were constructed.
After one year, the liner was exposed and studied. The quality of the structures, especially the mineral liner were visually evaluated and gas emissions were measured from the surface. The density of the layer was measured by volymeter and troxler and the water content and permeability were measured in laboratory. Based on the visual inspection the surface of the mineral liner was smooth, and the layer homogenious and hardened

General information

Publication status: Published
MoE publication type: A3 Part of a book or another research book
Organisations: Civil Engineering, Research group: Earth Constructions
Contributors: Leppänen, M., Sarkkila, J., Hämäläinen, H., Rinkinen, J.
Pages: 168-175
Publication date: 6 Jun 2018

Host publication information

Title of host publication: Proceedings of the 10th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials WASCON 2018 : No Gradle, No Grave - Circular Economy into Practice
Publisher: RIL - Finnish Association of Civil Engineers
Editors: Raasakka, V., Lahtinen, P.
ISBN (Electronic): 978-951-758-631-3
Keywords: municipal solid waste bottom slag, Landfill cover, bentonite, chemical incompability

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

KUPERA-kaupunkien teknisen sektorin johto kaipaa toimintakulttuuriin muutosta : Haasteista innovatiivisiin mahdollisuuksiin

General information

Publication status: Published
MoE publication type: D1 Article in a trade journal
Organisations: Former organisation of the author
Contributors: Leponiemi, U., Heino, O.
Pages: 51-52
Publication date: 2011
Peer-reviewed: Unknown

Publication information

Journal: Kuntatekniikka
Issue number: 7
ISSN (Print): 1238-125X
Original language: Finnish

Bibliographical note

Affiliaatio: Johtamiskorkeakoulu, Tampereen Yliopisto<br/>Contribution: organisation=keb,FACT1=1

Source: researchoutputwizard
Source ID: 6593

Research output: Contribution to journalArticleProfessional

Kirjastolta uutta tiedonhankinnan opetusta tukemaan opetusta antavien yksiköiden toimintaa

General information

Publication status: Published
MoE publication type: A4 Article in a conference publication
Organisations: Library, Department of Energy and Process Engineering
Contributors: Lepistö, K., Korpinen, L.
Pages: 136-138
Publication date: 2010

Host publication information

Title of host publication: ReflekTori 2010 Tekniikan opetuksen symposium 9.-10.2010, Espoo. Dipoli-raportit B
Editor: Myller, E.
ISBN (Print): 978-952-60-3477-5

Bibliographical note

Contribution: organisation=epr,FACT1=1<br/>Contribution: organisation=kir,FACT2=0

Source: researchoutputwizard
Source ID: 8616

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

Particulate Mass and Nonvolatile Particle Number Emissions from Marine Engines Using Low-Sulfur Fuels, Natural Gas, or Scrubbers

In order to meet stringent fuel sulfur limits, ships are increasingly utilizing new fuels or, alternatively, scrubbers to reduce sulfur emissions from the combustion of sulfur-rich heavy fuel oil. The effects of these methods on particle emissions are important, because particle emissions from shipping traffic are known to have both climatic and health effects. In this study, the effects of lower sulfur level liquid fuels, natural gas (NG), and exhaust scrubbers on particulate mass (PM) and nonvolatile particle number (PN greater than 23 nm) emissions were studied by measurements in laboratory tests and in use. The fuel change to lower sulfur level fuels or to NG and the use of scrubbers significantly decreased the PM emissions. However, this was not directly linked with nonvolatile PN emission reduction, which should be taken into consideration when discussing the health effects of emitted particles. The lowest PM and PN emissions were measured when utilizing NG as fuel, indicating that the use of NG could be one way to comply with up-coming regulations for inland waterway vessels. Low PN levels were associated with low elemental carbon. However, a simultaneously observed methane slip should be taken into consideration when evaluating the climatic impacts of NG-fueled engines.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: The Instrumentation, Emissions, and Atmospheric Aerosols Group, Physics, Research area: Aerosol Physics, VTT Technical Research Centre of Finland, Finnish Meteorological Institute
Contributors: Lehtoranta, K., Aakko-Saksa, P., Murtonen, T., Vesala, H., Ntziachristos, L., Rönkkö, T., Karjalainen, P., Kuittinen, N., Timonen, H.
Number of pages: 8
Pages: 3315-3322
Publication date: 19 Feb 2019
Peer-reviewed: Yes

Publication information

Journal: Environmental Science and Technology
Volume: 53
Issue number: 6
ISSN (Print): 0013-936X
Ratings: 
  • Scopus rating (2019): CiteScore 12.6 SJR 2.704 SNIP 2.06
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Power generation in fed-batch and continuous up-flow microbial fuel cell from synthetic wastewater

Up-flow bioreactors have the advantages of retaining very high cell density and having high mass transfer efficiency. The recirculation rate could improve the up-flow rate in up-flow bioreactor. A two-chamber UFMFC (up-flow microbial fuel cell) is constructed with flat graphite electrodes and anion exchange membrane for electricity generation. The anode chamber is seeded with compost culture enriched on xylose and operated on synthetic wastewater with 0.5 g/L xylose, external resistance of 100 Ω, at pH 7.0 and 37 °C in fed-batch mode. The cathode chamber in the top of the UFMFC is filled with potassium ferricyanide (pH 7.0) as the electron acceptor. The effects of different recirculation rates of 1.2, 2.4, 4.8 and 7.2 RV (reactor-volumes)/h to increase the mass transfer and electricity production are determined in fed-batch mode. At a recirculation rate of 4.8 RV/h, a power density of 356 ± 24 mW/m2 with CE (coulombic efficiency) of 21.3 ± 1.0% is obtained. Decreasing HRT (hydraulic retention time) could improve the electricity production performance of UFMFC in continuous mode. The power generation is increased to 372 ± 20 mW/m2, while CE remains at 13.4 ± 0.5% with HRT of 1.7 d and optimum recirculation rate of 4.8 RV/h on continuous mode. Microbial communities were characterized with PCR (polymerase chain reaction) - DGGE (denaturing gradient gel electrophoresis). In the end of the experiment, the biofilm contained both fermenting and exoelectrogenic bacteria, while fermenting and nitrate-reducing bacteria were mainly present in the anodic solutions. Moreover, some changes occurred in the microbial communities of the anodic solutions when the MFCs were switched from fed-batch to continuous mode, while the differences were minor between different recirculation rates in fed-batch mode.

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: Lay, C., Kokko, M. E., Puhakka, J. A.
Number of pages: 7
Pages: 235-241
Publication date: 1 Nov 2015
Peer-reviewed: Yes

Publication information

Journal: Energy
Volume: 91
ISSN (Print): 0360-5442
Ratings: 
  • Scopus rating (2015): CiteScore 7.4 SJR 2.22 SNIP 2.027
Original language: English
ASJC Scopus subject areas: Energy(all), Pollution
Keywords: Continuous mode, Microbial fuel cell, Recirculation rate, Two chamber, Up-flow, Xylose
Source: Scopus
Source ID: 84946031190

Research output: Contribution to journalArticleScientificpeer-review

Kyläyhteisöt palvelukulutuksen alustana

General information

Publication status: Published
MoE publication type: D4 Published development or research report or study
Organisations: Department of Chemistry and Bioengineering
Contributors: Laukka, A., Heino, O., Valkama, P., Salonen, A.
Number of pages: 16
Publication date: 2013

Publication information

Place of publication: Tampere
Publisher: Maaseutupolitiikan yhteistyöryhmä, YTR
ISBN (Print): 978-952-227-782-4
Original language: Finnish

Publication series

Name: Maaseutupolitiikan yhteistyöryhmän julkaisuja
Publisher: Maaseutupolitiikan yhteistyöryhmä, YTR
No.: 6
ISSN (Print): 1238-6464

Bibliographical note

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

Source: researchoutputwizard
Source ID: 2732

Research output: Book/ReportCommissioned reportProfessional

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

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

Production of Electricity and Butanol from Microalgal Biomass in Microbial Fuel Cells

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., Tuovinen, O. H., Puhakka, J. A.
Pages: 481-491
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: BioEnergy Research
Volume: 5
Issue number: 2
ISSN (Print): 1939-1234
Ratings: 
  • Scopus rating (2012): CiteScore 4.5 SJR 1.349 SNIP 1.668
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: Springer New York LLC

Source: researchoutputwizard
Source ID: 4645

Research output: Contribution to journalArticleScientificpeer-review

Mine wastewater treatment using Phalaris arundinacea plant material hydrolyzate as substrate for sulfate-reducing bioreactor

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Lakaniemi, A., Nevatalo, L. M., Kaksonen, A. H., Puhakka, J. A.
Pages: 3931-3939
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Bioresource Technology
Volume: 101
Issue number: 11
ISSN (Print): 0960-8524
Ratings: 
  • Scopus rating (2010): SJR 2.089 SNIP 2.348
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8565

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

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

Water Supply and Sanitation in a Green Economy Society: The Case of Finland

A green economy specifically considers the welfare of the environment and is closely aligned with sustainable development—in both, the use of natural resources should be less than their natural production. In this article, the concept of a green economy is discussed from the viewpoint of water services, a crucial part of a sustainable society, with the objective of enhancing knowledge about sustainable and resilient water services that will meet society’s future demands. Drawing from a literature review and a stakeholder workshop attended by 68 experts, it seeks to answer three research questions: (a) What are appropriate and sustainable urban water supply and sanitation policies for a society that is adopting the basic principles of a green economy? (b) What should be the role of water supply and sanitation in a green and circular economy and what are the current challenges to meeting this objective? and (c) What actions are needed in the Finnish water and sanitation services (WSS) sector to effectively meet the requirements of a green and circular economy? The results are applied to the specific case of Finland, and recommendations and conclusions for the Finnish society and its water services are presented.

General information

Publication status: E-pub ahead of print
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Finnish Environment Institute
Contributors: Laitinen, J., Antikainen, R., Hukka, J. J., Katko, T. S.
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: Public Works Management and Policy
ISSN (Print): 1087-724X
Ratings: 
  • Scopus rating (2019): CiteScore 1.9 SJR 0.448 SNIP 1.183
Original language: English
ASJC Scopus subject areas: Business, Management and Accounting (miscellaneous), Sociology and Political Science, Public Administration
Keywords: green economy, sanitation, sustainable development, water services, water supply

Bibliographical note

EXT="Laitinen, Jyrki"

Source: Scopus
Source ID: 85066303562

Research output: Contribution to journalArticleScientificpeer-review

Turning up the heat on printability

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Energy and Process Engineering
Contributors: Lahti, J., Tuominen, M.
Pages: 7-7
Publication date: 2010
Peer-reviewed: No

Publication information

Journal: Packaging Professional (The Magazine of the Packaging Society)
Volume: 33
Issue number: 5
ISSN (Print): 1477-8467
Original language: English

Bibliographical note

Contribution: organisation=epr pap,FACT1=1

Source: researchoutputwizard
Source ID: 8551

Research output: Contribution to journalArticleScientific

Turning up the heat on printability

General information

Publication status: Published
MoE publication type: B1 Article in a scientific magazine
Organisations: Department of Energy and Process Engineering
Contributors: Lahti, J., Tuominen, M.
Pages: 15-15
Publication date: 2010
Peer-reviewed: No

Publication information

Journal: Materials World
Volume: 18
Issue number: 10
ISSN (Print): 0967-8638
Ratings: 
  • Scopus rating (2010): SJR 0.103 SNIP 0
Original language: English

Bibliographical note

Contribution: organisation=epr pap,FACT1=1

Source: researchoutputwizard
Source ID: 8552

Research output: Contribution to journalArticleScientific

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

Paperinjalostus- ja pakkaustekniikan tutkimusyksikkö uudistaa kurssitarjontaa

General information

Publication status: Published
MoE publication type: E1 Popularised article, newspaper article
Organisations: Department of Energy and Process Engineering
Contributors: Lahti, J., Kuusipalo, J.
Number of pages: 1
Pages: 1-1
Publication date: 2010
Peer-reviewed: Unknown

Publication information

Journal: Anturi
Issue number: 5
ISSN (Print): 0782-7849
Original language: Finnish

Bibliographical note

Contribution: organisation=epr pap,FACT1=1

Source: researchoutputwizard
Source ID: 8550

Research output: Contribution to journalArticleGeneral public

Nanoscale Surface Processing of Extrusion Coated Substrates with Atmospheric Plasma Technology

General information

Publication status: Published
Organisations: Department of Materials Science, Research group: Paper Converting and Packaging, Engineering materials science and solutions (EMASS)
Contributors: Lahti, J.
Publication date: 2013
Peer-reviewed: Unknown
Event: Paper presented at 14th TAPPI. European Place Conference 6-8 May 2013 Swissotel Dresden, Germa, .

Research output: Other conference contributionPaper, poster or abstractScientific

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

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