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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

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

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

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

Particle growth with photochemical age from new particle formation to haze in the winter of Beijing, China

Secondary aerosol formation in the aging process of primary emission is the main reason for haze pollution in eastern China. Pollution evolution with photochemical age was studied for the first time at a comprehensive field observation station during winter in Beijing. The photochemical age was used as an estimate of the timescale attributed to the aging process and was estimated from the ratio of toluene to benzene in this study. A low photochemical age indicates a fresh emission. The photochemical age of air masses during new particle formation (NPF) days was lower than that on haze days. In general, the strongest NPF events, along with a peak of the formation rate of 1.5 nm (J1.5) and 3 nm particles (J3), were observed when the photochemical age was between 12 and 24 h while rarely took place with photochemical ages less than 12 h. When photochemical age was larger than 48 h, haze occurred and NPF was suppressed. The sources and sinks of nanoparticles had distinct relation with the photochemical age. Our results show that the condensation sink (CS) showed a valley with photochemical ages ranging from 12 to 24 h, while H2SO4 concentration showed no obvious trend with the photochemical age. The high concentrations of precursor vapours within an air mass lead to persistent nucleation with photochemical age ranging from 12 to 48 h in winter. Coincidently, the fast increase of PM2.5 mass was also observed during this range of photochemical age. Noteworthy, CS increased with the photochemical age on NPF days only, which is the likely reason for the observation that the PM2.5 mass increased faster with photochemical age on NPF days compared with other days. The evolution of particles with the photochemical age provides new insights into understanding how particles originating from NPF transform to haze pollution.

General information

Publication status: E-pub ahead of print
MoE publication type: A1 Journal article-refereed
Organisations: Physics, Research group: The Instrumentation, Emissions, and Atmospheric Aerosols Group, Beijing University of Chemical Technology, University of Helsinki, Shanghai Institute of Ceramics Chinese Academy of Sciences, Research Center for Eco-Environmental Sciences Chinese Academy of Sciences, Tsinghua University, Nanjing University
Contributors: Chu, B., Dada, L., Liu, Y., Yao, L., Wang, Y., Du, W., Cai, J., Dällenbach, K. R., Chen, X., Simonen, P., Zhou, Y., Deng, C., Fu, Y., Yin, R., Li, H., He, X. C., Feng, Z., Yan, C., Kangasluoma, J., Bianchi, F., Jiang, J., Kujansuu, J., Kerminen, V. M., Petäjä, T., He, H., Kulmala, M.
Number of pages: 7
Publication date: 2020
Peer-reviewed: Yes

Publication information

Journal: Science of the Total Environment
Volume: 753
Article number: 142207
ISSN (Print): 0048-9697
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Environmental Chemistry, Waste Management and Disposal, Pollution
Keywords: Condensation sink, Haze, New particle formation, Photochemical aging, Pollution evolution
Source: Scopus
Source ID: 85090708523

Research output: Contribution to journalArticleScientificpeer-review

The most difficult at-fault fatal crashes to avoid with current active safety technology

Objective: We studied which current fatal at-fault crashes would occur despite the most advanced current active safety devices (up to SAE level 2 of driving automation) and how frequent these crashes would be.
Methods: We carried out a cross-sectional study of passenger cars that were first registered during the period 1st January 2010 to 31st December 2017 in Finland. To gain the true exposure for these cars, we accessed the national Vehicular and Driver Data Register to obtain the mileage information and the registration count for the study period of 2010-17. Similarly, we accessed the registry of Finnish road accident investigation teams and included all fatal at-fault crashes among the cars in our study for the same period. We used a real world reference technology for each active safety system in our analysis and chose one car brand as an example. This gave us exact system specifications and enabled testing the operation of the systems on the road. We performed field tests to gain further information on the precise operation of the safety systems in different operating conditions. Finally, we gathered all information on the studied active safety systems and analyzed the investigated at-fault fatal crashes case-by-case using our four level method.
Results: Cars in our study were the primary party in 113 investigated fatal accidents during the years 2010-17. In 87 of the accidents, the leading cause of death was the injuries due to the crash, and these cases were classified as “unavoidable” (n = 58, 67 %), “avoidable” (n = 26, 30 %) or unsolved (n = 3, 3 %). Of the 58 “unavoidable” crashes 21 (36 %) were suicides, 21 (36%) involved active driver input which would have prevented the safety system operation, 15 (17 %) featured circumstances beyond the safety system performance and in one loss-of-control crash the driver had disabled the relevant safety system (electronic stability control). The registration years of the cars in our study (2010-17) totaled 3,772,864 and during this period, the cars travelled 75.9 billion kilometers. The crash incidence of the “unavoidable” at-fault fatal crashes was 0.76-0.80 fatal crashes per billion kilometers and 15-16 fatal crashes per million registration years.
Conclusions: We calculated a crash incidence for the “unavoidable” crashes which was 20–27% smaller than the observed crash rate of ESC-fitted passenger cars in our previous study. We concluded that suicides, active driver input until the crash, and challenging weather and road conditions are the most difficult factors for current active safety systems. Our analysis did not account for issues such as system usability or driver acceptance and therefore our results should be regarded as something that is currently theoretically achievable. However, the observed incidence is a good reference for automated driving development and the crash rate of automated cars.

General information

Publication status: E-pub ahead of print
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Transport Research Centre Verne, Aalto University, Helsinki University, Finnish Crash Data Institute
Contributors: Koisaari, T., Utriainen, R., Kari, T., Tervo, T.
Publication date: 13 Dec 2019
Peer-reviewed: Yes

Publication information

Journal: Accident Analysis and Prevention
Volume: 135
Issue number: 2020
Article number: 105396
ISSN (Print): 0001-4575
Ratings: 
  • Scopus rating (2019): CiteScore 6.4 SJR 1.69 SNIP 2.296
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Highly ductile amorphous oxide at room temperature and high strain rate

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

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

Improved water services cooperation through clarification of rules and roles

Water services face global challenges, many of which are institutional by nature. While technical solutions may suit several situations, institutional frameworks are likely to vary more. On the basis of constructive research approach and new institutional economics we analyze and illustrate water services and the roles of various water sector actors in Finnish water utility setting using the "soccer analogy" by the Nobel Laureate D.C. North: Institutions are the "formal and informal rules of the game" while organizations are the "players". Additionally, we assess the Finnish water governance system and discuss issues of scale and fragmentation and distinguish terms water provision and production. Finally, we elaborate the limitations of the soccer analogy to water services through ownership of the systems. According to the soccer analogy, inclusive institutional development requires skillful players (competent staff), team play (collaboration), proper coaching (education), supporters (citizens, media), managers (policymakers), and referees (authorities). We argue that institutional diversity and player/stakeholder collaboration are the foundation for enhancing good multi-level water governance, and that water management, although fragmented, should be seen as a connector of different sectors. For successful outcomes, scientific results should be communicated to public in more common language.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Research group: Capacity Development of Water and Environmental Services CADWES
Contributors: Inha, L. M., Katko, T. S., Rajala, R. P.
Publication date: 19 Oct 2019
Peer-reviewed: Yes

Publication information

Journal: Water (Switzerland)
Volume: 11
Issue number: 10
Article number: 2172
ISSN (Print): 2073-4441
Ratings: 
  • Scopus rating (2019): CiteScore 3 SJR 0.657 SNIP 1.074
Original language: English
ASJC Scopus subject areas: Biochemistry, Geography, Planning and Development, Aquatic Science, Water Science and Technology
Keywords: Good governance, Institutional diversity, Institutions, Rules and roles, Soccer analogy, Stakeholder collaboration
Electronic versions: 
Source: Scopus
Source ID: 85074329077

Research output: Contribution to journalArticleScientificpeer-review

Transient–state operation of an anoxic biotrickling filter for H2S removal

The application of an anoxic biotrickling filter (BTF) for H2S removal from contaminated gas streams is a promising technology for simultaneous H2S and NO3− removal. Three transient–state conditions, i.e. different liquid flow rates, wet–dry bed operations and H2S shock loads, were applied to a laboratory–scale anoxic BTF. In addition, bioaugmentation of the BTF with a H2S removing–strain, Paracoccus MAL 1HM19, to enhance the biomass stability was investigated. Liquid flow rates (120, 60 and 30 L d−1) affected the pH and NO3− removal efficiency (RE) in the liquid phase. Wet–dry bed operations at 2–2 h and 24–24 h reduced the H2S elimination capacity (EC) by 60–80%, while the operations at 1–1 h and 12–12 h had a lower effect on the BTF performance. When the BTF was subjected to H2S shock loads by instantly increasing the gas flow rate (from 60 to 200 L h−1) and H2S inlet concentration (from 112 (± 15) to 947 (± 151) ppmv), the BTF still showed a good H2S RE (>93%, EC of 37.8 g S m–3 h–1). Bioaugmentation with Paracoccus MAL 1HM19 enhanced the oxidation of the accumulated S0 to sulfate in the anoxic BTF.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science and Environmental Engineering, Department of Civil, Architectural and Environmental Engineering (DICEA), University of Naples Federico II, Wageningen University and the UNESCO-IHE Institute for Water Education, Delft, The Netherlands, 18.10.2013, Hydraulic and Environmental Engineering (IHE) Inst. for Water Education
Contributors: Khanongnuch, R., Di Capua, F., Lakaniemi, A., Rene, E. R., Lens, P.
Number of pages: 10
Pages: 42-51
Publication date: 5 Sep 2019
Peer-reviewed: Yes

Publication information

Journal: Journal of Hazardous Materials
Volume: 377
ISSN (Print): 0304-3894
Ratings: 
  • Scopus rating (2019): CiteScore 13.1 SJR 2.01 SNIP 2.159
Original language: English

Research output: Contribution to journalArticleScientificpeer-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

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

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

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

General information

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

Publication information

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

Bibliographical note

EXT="Kuusela, Mikko"

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

Long-term performance evaluation of an anoxic sulfur oxidizing moving bed biofilm reactor under nitrate limited conditions

An anoxic sulfur-oxidizing moving bed biofilm reactor (MBBR) treating sulfur and nitrate-contaminated synthetic wastewater was monitored for 306 days under feed nitrogen-to-sulfur (N/S) molar ratios of 0.5, 0.3 and 0.1. Thiosulfate (S2O32−) removal efficiencies (RE) exceeding 98% were observed at a N/S ratio of 0.5 and a S2O32− loading rate of 0.9 g S2O32−–S L−1 d−1, whereas a RE of 82.3 (±2.6)% and 37.7 (±3.4)% were observed at N/S ratios of 0.3 and 0.1, respectively. Complete nitrate (NO3−) removal was obtained at all tested N/S ratios. A comparison of the kinetic parameters of the MBBR biomass under the same stoichiometric conditions (N/S ratio of 0.5) revealed a 1.3-fold increase of the maximum specific rate of S2O32− oxidation (rmax) and a 30-fold increase of the affinity constant for S2O32− (Ks) compared to those observed after long-term NO3− limitation (N/S ratio of 0.1). The MBBR showed optimal resilience to NO3− limitation as the S2O32− RE recovered from 37.3% to 94.1% within two days after increasing the N/S ratio from 0.1 to 0.5. Based on PCR-DGGE analysis, sulfur-oxidizing nitrate-reducing bacteria, i.e. Thiobacillus sp. and Sulfuritalea sp., dominated in the MBBR biofilm during the entire study.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Bio- and Circular Economy, Materials Science and Environmental Engineering, Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, ENEA/CREATE/Università Degli Studi Napoli Federico II, Wageningen University and the UNESCO-IHE Institute for Water Education, Delft, The Netherlands, 18.10.2013, Hydraulic and Environmental Engineering (IHE) Inst. for Water Education
Contributors: Khanongnuch, R., Di Capua, F., Lakaniemi, A., Rene, E. R., Lens, P.
Pages: 1072-1081
Publication date: 29 Apr 2019
Peer-reviewed: Yes

Publication information

Journal: Environmental Science: Water Research & Technology
Volume: 5
Issue number: 6
ISSN (Print): 2053-1400
Ratings: 
  • Scopus rating (2019): CiteScore 5.5 SJR 1.058 SNIP 1.094
Original language: English

Research output: Contribution to journalArticleScientificpeer-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

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

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

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

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

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

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

Microstructure-property relationships of novel ultra-high strength press hardening steels

The industrial significance of microalloyed martensitic steels manufactured via cold rolling, reaustenitization, and quenching has been typically recognized as low. However, it is currently believed that microalloying can improve the in-service properties of ultra-high-strength press hardening steels. In this work, five 34MnB5-based steels were designed to address the role of Ti and V when combined with Cr or Mo. Microstructure-property relationships were analyzed after die quenching and additional bake hardening (BH) heat treatment using advanced methods of microscopy, glow discharge optical emission spectroscopy, quasi-static tensile tests, and three-point bending tests. Results indicate that both Ti and V can provide grain size refinement through the formation of stabile nanosized precipitates. The BH treatment improved postuniform elongation values, indicating a trend of improved ductility. However, the expected improvements in bendability were clearly confirmed only for two V-microalloyed steels with the alloying concepts of 0.3Cr-0.15V-0.03Al-0.02Ti-0.0020B and 0.3Mo-0.15V-0.0060N (without Al-Ti-B additions) (wt pct). Thus, it was discovered that microalloying with V, when combined with either Cr or Mo, provides a promising combination of mechanical properties as far as the austenitization parameters are appropriately controlled.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science, Research group: Metals Technology, Research group: Materials Characterization, SSAB Europe Oy
Contributors: Järvinen, H., Honkanen, M., Oja, O., Järvenpää, M., Peura, P.
Number of pages: 21
Pages: 816-836
Publication date: 2019
Peer-reviewed: Yes
Early online date: 29 Nov 2018

Publication information

Journal: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume: 50
Issue number: 2
ISSN (Print): 1073-5623
Ratings: 
  • Scopus rating (2019): CiteScore 3.9 SJR 0.906 SNIP 1.22
Original language: English
ASJC Scopus subject areas: Condensed Matter Physics, Mechanics of Materials, Metals and Alloys
Keywords: Press hardening, Bake hardening, Martensite, EBSD, TEM, Mechanical behavior
Electronic versions: 
URLs: 

Research output: Contribution to journalArticleScientificpeer-review

Towards the EU emissions targets of 2050: optimal energy renovation measures of Finnish apartment buildings

Member countries of the European Union have released targets to reduce carbon dioxide emissions by 80% by the year 2050. Energy use in buildings is a major source of these emissions, which is why this study focused on the cost-optimal renovation of Finnish apartment buildings. Apartment buildings from four different construction years (pre-1976, 1976–2002, 2003–2009 and post-2010) were modelled, using three different heating systems: district heating, ground-source heat pump and exhaust air heat pump. Multi-objective optimisation was utilised to find the most cost-effective energy renovation measures. Most cost-effective renovation measures were ground-source heat pumps, demand-based ventilation and solar electricity. Additional thermal insulation of walls was usually too expensive. By performing only the cost-effective renovations, the emissions could be reduced by 80%, 82%, 69% and 68%, from the oldest to the newest buildings, respectively. This could be done with the initial investment cost of 296, 235, 115 and 104 €/m2, respectively.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Aalto University, Nanjing Tech University
Contributors: Hirvonen, J., Jokisalo, J., Heljo, J., Kosonen, R.
Publication date: 2019
Peer-reviewed: Yes
Early online date: 2018

Publication information

Journal: International Journal of Sustainable Energy
Volume: 38
Issue number: 7
ISSN (Print): 1478-6451
Ratings: 
  • Scopus rating (2019): CiteScore 3 SJR 0.427 SNIP 0.595
Original language: English
ASJC Scopus subject areas: Renewable Energy, Sustainability and the Environment, Fuel Technology, Energy(all), Process Chemistry and Technology, Fluid Flow and Transfer Processes
Keywords: apartment building, Cost-optimal renovation, energy performance, greenhouse gas emissions, multi-objective optimisation
Source: Scopus
Source ID: 85058681434

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

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

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

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

Microalgae grow on source separated human urine in Nordic climate: Outdoor pilot-scale cultivation

Human urine contributes approximately 80% of nitrogen and 50% of phosphorous in urban wastewaters while having a volume of only 1–1.5 L/d per capita compared to 150–200 L/d per capita of wastewater generated. There is interest to study source separation of urine and search methods to recover the nutrients form the urine. In this study, the objective was to use the nutrients in source separated urine for outdoor cultivation of microalgae in Nordic climate. A freshwater green microalga Scenedesmus acuminatus was grown in different dilutions (1:20 and 1:15) of source separated human urine, in a semi-continuously operated outdoor raceway pond with a liquid volume of 2000 L, at hydraulic retention time of 15 d. The microalgae could remove 52% nitrogen and 38% phosphorus even at culture temperatures as low as 5 °C, while obtaining a biomass density of 0.34 g VSS/L. Harvested microalgal biomass could be used to produce methane with a yield of 285 L CH4/kg volatile solids.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Research group: Bio- and Circular Economy, Materials Science and Environmental Engineering
Contributors: Chatterjee, P., Granatier, M., Ramasamy, P., Kokko, M., Lakaniemi, A., Rintala, J.
Number of pages: 9
Pages: 119 - 127
Publication date: 2019
Peer-reviewed: Yes

Publication information

Journal: Journal of Environmental Management
Volume: 237
ISSN (Print): 0301-4797
Ratings: 
  • Scopus rating (2019): CiteScore 7.6 SJR 1.321 SNIP 1.839
Original language: English
Keywords: Microalgae, Nutrient recovery, Raceway pond, Source separated human urine

Bibliographical note

INT=msee,"Granatier, Marianna"

Source: Bibtex
Source ID: CHATTERJEE2019119

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

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

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

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

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

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

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

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

Radon, fungal spores and MVOCs reduction in crawl space house: A case study and crawl space development by hygrothermal modelling

In this case study was to investigate how ventilation of the crawl space will influence on concentrations of radon, fungal spores and MVOCs in the crawl space and indoors of detached house. The crawl space pressurisation by exhaust air from indoors was successful to prevent the convective flow of radon from the soil, but it increased microbial growth in the crawl space. After installation of the supply and exhaust ventilation in the crawl-space and in the living space, the concentrations of fungal spores in the crawl space and also entry of radon and MVOCs into a house decreased. A microbiologically safe crawl space was determined with hygrothermal simulation utilizing the Finnish Mould Growth Model and a two year examination period. The optional structures of the crawl space being depressurised with exhaust ventilation included an open base uncovered ground and various air-sealed closed structures. When mould growth of building materials was at medium resistant sensitivity class, mould was not observed during different air change rates in any of the examined structures. Open base uncovered gravel ground is a functional solution of a crawl space, only when there are no organic materials. The air-sealed ground structure is recommended build with concrete + insulation and when air exchange rate (ach) varied from 0.2 to 1 h−1. A concrete ground in the crawl space having ach from 0.2 to 0.6 h−1 is also very effective. XPS insulation and plastic sheet covered ground are not recommendable due to their high mould index.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering, Ramboll Finland Ltd., Ita-Suomen yliopisto
Contributors: Keskikuru, T., Salo, J., Huttunen, P., Kokotti, H., Hyttinen, M., Halonen, R., Vinha, J.
Number of pages: 10
Pages: 1-10
Publication date: 15 Jun 2018
Peer-reviewed: Yes

Publication information

Journal: Building and Environment
Volume: 138
ISSN (Print): 0360-1323
Ratings: 
  • Scopus rating (2018): CiteScore 8.1 SJR 1.879 SNIP 2.241
Original language: English
ASJC Scopus subject areas: Environmental Engineering, Civil and Structural Engineering, Geography, Planning and Development, Building and Construction
Keywords: Air change, Crawl space, Ground covers, Modelling, Mould growth, Radon
URLs: 

Bibliographical note

INT=rak,"Salo, J."

Source: Scopus
Source ID: 85046008041

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

UV-Blocking Synthetic Biopolymer from Biomass-Based Bifuran Diester and Ethylene Glycol

A furan-based synthetic biopolymer composed of a bifuran monomer and ethylene glycol was synthesized through melt polycondensation, and the resulting polyester was found to have promising thermal and mechanical properties. The bifuran monomer, dimethyl 2,2′-bifuran-5,5′-dicarboxylate, was prepared using a palladium-catalyzed, phosphine ligand-free direct coupling protocol. A titanium-catalyzed polycondensation procedure was found effective at polymerizing the bifuran monomer with ethylene glycol. The prepared bifuran polyester exhibited several intriguing properties including high tensile modulus. In addition, the bifuran monomer furnished the polyester with a relatively high glass transition temperature. Films prepared from the new polyester also had excellent oxygen and water barrier properties, which were found to be superior to those of poly(ethylene terephthalate). Moreover, the novel polyester also has good ultraviolet radiation blocking properties.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Chemistry & Advanced Materials, University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FI-90014 Oulu, University of Oulu, Fibre and Particle Engineering Research Unit, P.O. Box 4300, FI-90014 Oulu
Contributors: Kainulainen, T. P., Sirviö, J. A., Sethi, J., Hukka, T. I., Heiskanen, J. P.
Number of pages: 8
Pages: 1822-1829
Publication date: 21 Feb 2018
Peer-reviewed: Yes
Early online date: 21 Feb 2018

Publication information

Journal: Macromolecules
Volume: 51
Issue number: 5
ISSN (Print): 0024-9297
Ratings: 
  • Scopus rating (2018): CiteScore 9.9 SJR 2.243 SNIP 1.492
Original language: English
ASJC Scopus subject areas: Chemistry(all), Materials Science(all)
Keywords: Biopolymers, Synthesis, Characterization, Thermal analysis, Spectroscopy

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

Recycling potential of post-consumer plastic packaging waste in Finland

Recycling of plastics is urged by the need for closing material loops to maintain our natural resources when striving towards circular economy, but also by the concern raced by observations of plastic scrap in oceans and lakes. Packaging industry is the sector using the largest share of plastics, hence packaging dominates in the plastic waste flow. The aim of this paper was to sum up the recycling potential of post-consumer plastic packaging waste in Finland. This potential was evaluated based on the quantity, composition and mechanical quality of the plastic packaging waste generated by consumers and collected as a source-separated fraction, within the mixed municipal solid waste (MSW) or within energy waste.

Based on the assessment 86,000–117,000 tons (18 kg/person/a) of post-consumer plastic packaging waste was generated in Finland in 2014. The majority, 84% of the waste was in the mixed MSW flow in 2014. Due to the launching of new sorting facilities and separate collections for post-consumer plastic packaging in 2016, almost 40% of the post-consumer plastic packaging could become available for recycling. However, a 50% recycling rate for post-consumer plastic packaging (other than PET bottles) would be needed to increase the overall MSW recycling rate from the current 41% by around two percentage points.

The share of monotype plastics in the overall MSW plastics fraction was 80%, hence by volume the recycling potential of MSW plastics is high. Polypropylene (PP) and low density polyethylene (LDPE) were the most common plastic types present in mixed MSW, followed by polyethylene terephthalate (PET), polystyrene (PS) and high density polyethylene (HDPE). If all the Finnish plastic packaging waste collected through the three collection types would be available for recycling, then 19,000–25,000 tons of recycled PP and 6000–8000 tons of recycled HDPE would be available on the local market. However, this assessment includes uncertainties due to performing the composition study only on mixed MSW plastic fraction. In order to obtain more precise figures of the recycling potential of post-consumer plastic packaging, more studies should be performed on both the quantities and the qualities of plastic wastes.

The mechanical and rheological test results indicated that even plastic wastes originating from the mixed MSW, can be useful raw materials. Recycled HDPE showed a smaller decline in the mechanical properties than recycled PP. The origin and processing method of waste plastic seemed to have less effect on the mechanical quality than the type of plastic. The applicability of a plastic waste for a product needs to be assessed case by case, due to product specific quality requirements. In addition to mechanical properties, the chemical composition of plastic wastes is of major importance, in order to be able to restrict hazardous substances from being circulated undesirably.

In addition to quantity and quality of plastic wastes, the sustainability of the whole recycling chain needs to be assessed prior to launching operations so that the chain can be optimized to generate both environmental and economic benefits to society and operators.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Materials Science
Contributors: Dahlbo, H., Poliakova, V., Mylläri, V., Sahimaa, O., Anderson, R.
Pages: 52-61
Publication date: 2018
Peer-reviewed: Yes
Early online date: 31 Oct 2017

Publication information

Journal: Waste Management
Volume: 71
ISSN (Print): 0956-053X
Ratings: 
  • Scopus rating (2018): CiteScore 8.2 SJR 1.523 SNIP 2.232
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

Suomen vesihuollon kehitys kansainvälisessä kontekstissa

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering
Contributors: Katko, T. .., Juuti, P.
Number of pages: 20
Pages: 5-24
Publication date: 2018
Peer-reviewed: Yes

Publication information

Journal: Tekniikan Waiheita: Teknik I Tiden
Volume: 36
Issue number: 2
ISSN (Print): 0780-5772
Original language: Finnish
ASJC Scopus subject areas: Environmental Science(all), Engineering(all)
Keywords: water services, strategic development, sustainable development, long-term development, History, Futures

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

Landowners’ willingness to promote bioenergy production on wasteland − future impact on land use of cutaway peatlands

Landowners are the key players in bioenergy production on wasteland; such as cutaway peatlands. In this study, the landowner's interest to use cutaway peatlands for bioenergy production was investigated using a survey and GIS (Geographic Information Systems) methods in an area in South Ostrobothnia, Finland. The focus was to identify which different bioenergy production chains are preferred by the respondents: combustion, gasification or biogas production from agriculture, energy-willow short-rotation forestry or forestry based energy crops. Also, the influence of personal environmental values on the selection was measured and the future impacts and barriers for the land use were assessed. Afforestation was the most popular after-use method among the landowners. The next most favorable method was energy crop cultivation but it was highly dependent on economic profitability and subsidies. Currently, approximately 8.2% or 500 ha of the total peat extraction area could be used for bioenergy production in the region by 2035. Based on the survey, forest based biomass is the best option if bioenergy is to be produced. The next choice was agro biomass and the least favored plant was willow. This study suggests that the biggest cutaway peatlands will be converted to forest energy in the future. Suggestive results were that the owners with high environmental values are especially interested in agro biomass growing and the landowner having a distant home place does not have a negative influence on bioenergy production. Altogether, land use and biomass production of cutaway peatlands is connected with the demands of the Finnish bio-economy.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Bio- and Circular Economy, Jyväskylän yliopisto, Seinäjoki University of Applied Sciences
Contributors: Laasasenaho, K., Lensu, A., Rintala, J., Lauhanen, R.
Number of pages: 9
Pages: 167-175
Publication date: 1 Dec 2017
Peer-reviewed: Yes

Publication information

Journal: Land Use Policy
Volume: 69
ISSN (Print): 0264-8377
Ratings: 
  • Scopus rating (2017): CiteScore 5.1 SJR 1.348 SNIP 1.76
Original language: English
ASJC Scopus subject areas: Forestry, Geography, Planning and Development, Nature and Landscape Conservation, Management, Monitoring, Policy and Law
Keywords: Biogas, Combustion, Energy crop, Gasification, GIS, Willow
Electronic versions: 
URLs: 
Source: Scopus
Source ID: 85029532718

Research output: Contribution to journalArticleScientificpeer-review

Sata vuotta vesihuoltoa Suomessa

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering
Contributors: Juuti, P., Katko, T. S., Rajala, R.
Number of pages: 3
Pages: 13-15
Publication date: Dec 2017
Peer-reviewed: Yes

Publication information

Journal: Vesitalous
Volume: 58
Issue number: 6
ISSN (Print): 0505-3838
Original language: Finnish

Research output: Contribution to journalArticleScientificpeer-review

Vesihuollon ammattilaiset ovat verkostoituneet kautta aikojen

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Civil Engineering
Contributors: Katko, T. S., Juuti, P., Rajala, R.
Number of pages: 4
Pages: 16-19
Publication date: Dec 2017
Peer-reviewed: Yes

Publication information

Journal: Vesitalous
Volume: 58
Issue number: 6
ISSN (Print): 0505-3838
Original language: Finnish

Research output: Contribution to journalArticleScientificpeer-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

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

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

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

Service Failures of Rural Water Supply Systems in Ethiopia and Their Policy Implications

As the world is striving to improve water supply coverage, a significant number of rural communities are forced to turn back to unprotected sources due to service breakdowns of their water supply systems. Yet, these communities do not seem to receive the same attention as those building new systems. The purpose of this article is to reveal and diagnose the determinant factors of service failures and to propose mitigation measures to the rural water supply in Ethiopia. The study is conducted through a literature review and field discussions with experts (n = 48) and artisans (n = 35), who have been involved in the implementation, operation, and maintenance of the systems. Moreover, failed schemes (n = 20) were visited, and discussions were held with village elders of each water point. The findings indicate that lack of uniformity of implementation approaches, and institutional and organizational incapability of the local government aggravate the service failures. The further capacity building, institutionalization, and improving remuneration of employees are likely to reduce the problems substantially.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering
Contributors: Behailu, B. M., Hukka, J. J., Katko, T. S.
Pages: 179-196
Publication date: 2017
Peer-reviewed: Yes
Early online date: 1 Jul 2016

Publication information

Journal: Public Works Management & Policy
Volume: 22
Issue number: 2
ISSN (Print): 1087-724X
Ratings: 
  • Scopus rating (2017): CiteScore 1 SJR 0.307 SNIP 0.724
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Influence of TiO2 compact layer precursor on the performance of perovskite solar cells

The optimization of the hole-blocking layer in perovskite solar cells (PSC), typically based on TiO2, is crucial, as it strongly affects the device performance. In this work, we thoroughly characterize the thickness, roughness, and crystal structure of a set of TiO2 compact layers produced by spin coating of different precursor sols and correlate the choice of the TiO2 precursor to the photovoltaic performance of the PSC. By replacing the commonly used titanium isopropoxide (TTIP) blocking layer precursor with titanium tetrachloride (TiCl4), a clear enhancement in the PSC performance was observed, particularly in the hysteresis behavior and stability. The results from the morphological/structural analysis and transient photoluminescence studies clarify the different behavior of the compact layers in PSCs.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Supramolecular photochemistry, Åbo Akademi, Aalto University, VTT
Contributors: Vivo, P., Ojanperä, A., Smått, J., Sánden, S., Hashmi, S. G., Kaunisto, K., Ihalainen, P., Masood, M. T., Österbacka, R., Lund, P. D., Lemmetyinen, H.
Pages: 287-293
Publication date: 2017
Peer-reviewed: Yes
Early online date: 17 Nov 2016

Publication information

Journal: Organic Electronics
Volume: 41
ISSN (Print): 1566-1199
Ratings: 
  • Scopus rating (2017): CiteScore 6 SJR 1.085 SNIP 0.884
Original language: English

Bibliographical note

EXT="Kaunisto, Kimmo"

Research output: Contribution to journalArticleScientificpeer-review

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

Taking Water Services to the Next Level: A Paradigm Shift?

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O.
Number of pages: 6
Pages: 12-17
Publication date: 2017
Peer-reviewed: Yes
Early online date: 2016

Publication information

Journal: Public Works Management & Policy
Volume: 22
Issue number: 1
ISSN (Print): 1087-724X
Ratings: 
  • Scopus rating (2017): CiteScore 1 SJR 0.307 SNIP 0.724
Original language: English
Source: Bibtex
Source ID: urn:4eb95b4aa19d4699d23b10a4c3e5cb33

Research output: Contribution to journalComment/debateScientificpeer-review

Long term stability of air processed inkjet infiltrated carbon-based printed perovskite solar cells under intense ultra-violet light soaking

The long term stability of air processed inkjet infiltrated carbon based perovskite solar cells (CPSCs) is investigated under intense ultra-violet light soaking equivalent to 1.5 Sun UV light illumination. Two batches of the fabricated CPSCs were exposed systematically i.e. first without implementing any protective coating and then epoxying the CPSCs through a low cost commonly available epoxy which was applied to serve as a barrier against moisture and humidity intrusion. The CPSCs with no protective layer against moisture and humidity exhibited impressive preliminary stability for hundreds of hours during their exposure to intense UV light and provided great motivation to test the CPSCs further with more optimization. As a result, the CPSCs having commonly available epoxy as a protective barrier exhibited remarkable durability and showed no performance degradation for a period of 1002 hours under intense and continuous 1.5 Sun equivalent UV light illumination proving that the technology is clearly not inherently unstable and that future developments might lead to market breakthroughs.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Chemistry and Bioengineering, Research group: Supramolecular photochemistry, Aalto University, Solaronix, Ecole Polytechnique Fédérale de Lausanne
Contributors: Hashmi, S. G., Tiihonen, A., Martineau, D., Özkan, M., Vivo, P., Kaunisto, K., Vainio, U., Zakeeruddin, S. M., Grätzel, M.
Pages: 4797-4802
Publication date: 2017
Peer-reviewed: Yes
Early online date: 10 Feb 2017

Publication information

Journal: Journal of Materials Chemistry A
Volume: 5
Issue number: 10
ISSN (Print): 2050-7488
Ratings: 
  • Scopus rating (2017): CiteScore 16 SJR 3.488 SNIP 1.544
Original language: English

Bibliographical note

EXT="Kaunisto, Kimmo"

Research output: Contribution to journalArticleScientificpeer-review

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

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

Indigenous practices of water management for sustainable services: Case of Borana and Konso, Ethiopia

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Behailu, B. M., Pietilä, P. E., Katko, T. S.
Number of pages: 11
Pages: 1-11
Publication date: 6 Dec 2016
Peer-reviewed: Yes

Publication information

Journal: SAGE OPEN
Volume: 6
Issue number: 4
ISSN (Print): 2158-2440
Ratings: 
  • Scopus rating (2016): CiteScore 0.7 SJR 0.219 SNIP 0.536
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

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

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

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

Planning land use for biogas energy crop production: The potential of cutaway peat production lands

Each year, thousands of hectares of peatland that had been harvested are being released in Finland, which can offer an opportunity to increase energy crops and attain the bioenergy targets for non-agriculture lands. In this study, the Geographic Information System (GIS) method was used to improve the assessment of decentralized renewable energy resources. The amount of peat production lands and future cutaway areas for energy crop production was calculated as a case study by using ArcGIS and the Finnish Topographic database. There are almost 1000 km2 of peat production lands in Finland, and theoretically, approximately 300 km2 of cutaway peatlands could be used for energy crops after 30 years. The dry biomass yield of reed canary grass (Phalaris arundinacea) or timothy-fescue grass (mix of Phleum pratense and Festuca pratensis) could be higher than 100 Gg a-1 in these lands indicating methane potential of approximately 300 GWh. The exhausted peat production areas in the western region of Finland have significant potential for use for energy crops; North and South Ostrobothnia account for almost 45% of the total peat production land. A future goal could be to use the cutaway peat production lands more efficiently for bioenergy to mitigate climate change. Since the use of wastelands (including peatlands) are being considered in Europe as a way to avoid competition with food production, the GIS method used in the study to identify suitable peat lands could be applicable to biomass resource studies being conducted in many countries.

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: Laasasenaho, K., Lensu, A., Rintala, J.
Number of pages: 8
Pages: 355-362
Publication date: 1 Feb 2016
Peer-reviewed: Yes

Publication information

Journal: Biomass & Bioenergy
Volume: 85
ISSN (Print): 0961-9534
Ratings: 
  • Scopus rating (2016): CiteScore 6.4 SJR 1.198 SNIP 1.411
Original language: English
ASJC Scopus subject areas: Agronomy and Crop Science, Forestry, Renewable Energy, Sustainability and the Environment, Waste Management and Disposal
Keywords: Bioenergy, Festuca pratensis, GIS, Phalaris arundinacea, Phleum pratense, Wasteland

Bibliographical note

EXT="Laasasenaho, Kari"

Source: Scopus
Source ID: 84953292007

Research output: Contribution to journalArticleScientificpeer-review

Plasma-Assisted Fabrication of Fe2O3 - Co3O4 Nanomaterials as Anodes for Photoelectrochemical Water Splitting

Nanocomposite Fe2O3?Co3O4 photoanodes for photoelectrochemical H2O splitting were prepared by a plasma-assisted route. Specifically, Fe2O3 nanostructures were grown by plasma enhanced-chemical vapor deposition, followed by cobalt sputtering for different process durations. The systems were annealed in air after, or both prior and after, sputtering of Co, to analyze the treatment influence on functional performances. The interplay between processing conditions and chemico-physical features was investigated by a multi-technique characterization. Photocurrent density measurements in sunlight-assisted H2O splitting revealed a performance improvement upon Co3O4 loading. A cathodic shift of the onset potential was also observed, highlighting Co3O4 activity as catalyst for the oxygen evolution reaction.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Supramolecular photochemistry
Contributors: Carraro, G., Maccato, C., Gasparotto, A., Kaunisto, K., Sada, C., Barreca, D.
Number of pages: 10
Pages: 191-200
Publication date: 1 Jan 2016
Peer-reviewed: Yes
Early online date: 2015

Publication information

Journal: Plasma Processes and Polymers
Volume: 13
Issue number: 1
ISSN (Print): 1612-8869
Ratings: 
  • Scopus rating (2016): CiteScore 4.7 SJR 0.881 SNIP 0.915
Original language: English
Keywords: Co3O4, Fe2O3, plasma-enhanced chemical vapor deposition (PE-CVD), sputtering, water splitting
Source: Bibtex
Source ID: urn:fea2caf64465a2349fed5a21683d16de

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

Revisiting cellulase production and redefining current strategies based on major challenges Article reference: RSER5103

Lignocellulosic biomass has been considered as an important and sustainable source of renewable energy. Cellulose constitutes the major component of the lignocellulosic biomass and also offers maximum recalcitrance towards its fullest utilization. The enzymatic breakdown of cellulose is achieved through cellulases. Diverse forms of microbes including fungi, bacteria, actinomycetes and yeast are known to produce cellulases that have found extensive application in various industries. Due to the current global political unrest over oil prices and the threat of global warming following combustion of fossil fuels, the paradigm of research is now focused on biofuel production from plant biomass. Conventional approaches have not been economically feasible for meeting the demands of the industry. This review provides an update regarding the status of present microbial cellulase production technologies and research with special reference to solid state fermentation and different molecular techniques such as mutagenesis, metabolic engineering and heterologous gene expression of cellulases from different microbial domains with improved catalytic and stability properties. Metagenomic and genomic studies for mining of novel cellulase genes in addition to screening of culturable strains using conventional methods have been advanced. In addition the bottlenecks associated with cellulase production and how the future research needs to be directed to provide a comprehensive technology for the production of cellulases with novel traits for application at an industrial level without economic constraints are discussed.

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: Kuhad, R. C., Deswal, D., Sharma, S., Bhattacharya, A., Kumar Jain, K., Kaur, A., Pletschke, B. I., Singh, A., Karp, M.
Number of pages: 24
Pages: 249-272
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: Renewable and Sustainable Energy Reviews
Volume: 55
ISSN (Print): 1364-0321
Ratings: 
  • Scopus rating (2016): CiteScore 12.9 SJR 2.998 SNIP 3.543
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Use of diluted urine for cultivation of Chlorella vulgaris

Our aim was to study the biomass growth of microalga Chlorella vulgaris using diluted human urine as a sole nutrient source. Batch cultivations (21 days) were conducted in five different urine dilutions (1:25-1:300), in 1:100-diluted urine as such and with added trace elements, and as a reference, in artificial growth medium. The highest biomass density was obtained in 1:100-diluted urine with and without additional trace elements (0.73 and 0.60 g L(-1), respectively). Similar biomass growth trends and densities were obtained with 1:25- and 1:300-diluted urine (0.52 vs. 0.48 gVSS L(-1)) indicating that urine at dilution 1:25 can be used to cultivate microalgal based biomass. Interestingly, even 1:300-diluted urine contained sufficiently nutrients and trace elements to support biomass growth. Biomass production was similar despite pH-variation from < 5 to 9 in different incubations indicating robustness of the biomass growth. Ammonium formation did not inhibit overall biomass growth. At the beginning of cultivation, the majority of the biomass consisted of living algal cells, while towards the end, their share decreased and the estimated share of bacteria and cell debris increased.

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: Jaatinen, S., Lakaniemi, A., Rintala, J.
Number of pages: 12
Pages: 1159-1170
Publication date: 2016
Peer-reviewed: Yes
Early online date: 7 Nov 2015

Publication information

Journal: Environmental Technology
Volume: 37
Issue number: 9
ISSN (Print): 0959-3330
Ratings: 
  • Scopus rating (2016): CiteScore 3.1 SJR 0.569 SNIP 0.836
Original language: English
Source: PubMed
Source ID: 26508358

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

Preferential adsorption of Cu in a multi-metal mixture onto biogenic elemental selenium nanoparticles

Preferential adsorption of Cu contained in wastewaters is desirable as the Cu can then be reprocessed and reused more easily. In this study, biogenic elemental selenium nanoparticles (BioSeNPs) were assessed for their ability to preferentially adsorb Cu from an equimolar mixture containing Cu, Cd and Zn. Variations in metal to BioSeNPs ratios and initial metal solution pH improved the preferential adsorption capacity of BioSeNPs toward Cu, with the ratio of Cu adsorbed to combined Cd and Zn adsorbed varying from 2.3 to 6.6. More than 78% of the added Cu was adsorbed at an initial metal solution pH of 5.2 and metal to BioSeNPs ratio of 0.21mgmg-1 when the ratio of Cu adsorbed to the sum of Cd and Zn adsorbed was 2.3. Infrared spectroscopy revealed that the Cu, Cd and Zn were interacting with the hydroxyl and carboxyl surface functional groups of the BioSeNPs. The modeling of BioSeNPs' acid-base titration revealed the presence of high concentrations of carboxylic groups (C=60.3molkg-1) with a pKa of 3.9, providing further evidence of their interaction with Cu. The adsorption of Cu resulted in a lower colloidal stability of the BioSeNPs as indicated by more than 99% retention of added BioSeNPs after adsorption of heavy metals and filtration. BioSeNPs showed a good preferential adsorption capacity toward Cu as compared to other adsorbent. This study provides a proof-of-concept for the preferential adsorption of Cu onto BioSeNPs which are present in the effluent of a bioreactor treating selenium oxyanions containing wastewater.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Tampere University of Technology, Research group: Industrial Bioengineering and Applied Organic Chemistry, Université Paris-Est
Contributors: Jain, R., Dominic, D., Jordan, N., Rene, E. R., Weiss, S., van Hullebusch, E. D., Hübner, R., Lens, P. N. L.
Pages: 917–925
Publication date: 2016
Peer-reviewed: Yes
Early online date: 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
ASJC Scopus subject areas: Chemical Engineering(all), Chemistry(all), Industrial and Manufacturing Engineering, Environmental Chemistry
Keywords: Biogenic, Copper, FT-IR, Heavy metals, Preferential adsorption, Selenium nanoparticles
Source: Scopus
Source ID: 84942540702

Research output: Contribution to journalArticleScientificpeer-review

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

Modelling of plastic culvert and road embankment interaction in 3D

A series of 3D Finite Element simulations was performed to investigate the effect of different factors influencing the distortions undergone by a plastic culvert tube while subject to external loading from a heavy truck. The applied simulation model was verified by full-scale loading tests carried out on a number of actual culvert installation sites. Based on the results of the study, it can be concluded that both installation depth and quality of the material surrounding the culvert have a dominant effect on culvert distortions while the effects of material quality above the culvert and the type of tyre configuration transmitting the wheel load are much less pronounced.

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: Kolisoja, P., Kalliainen, A.
Number of pages: 8
Pages: 427-434
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: Procedia Engineering
Volume: 143
ISSN (Print): 1877-7058
Ratings: 
  • Scopus rating (2016): CiteScore 0.9 SJR 0.286 SNIP 0.725
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

Sorption of zinc onto elemental selenium nanoparticles immobilized in Phanerochaete chrysosporium pellets

The use of a novel hybrid biosorbent, elemental selenium nanoparticles (nSe0) immobilized in pellets of Phanerochaete chrysosporium, to remove Zn from aqueous solutions was investigated. Fungal pellets containing nSe0 (nSe0-pellets) showed to be better biosorbents as they removed more Zn (88.1 ± 5.3 %) compared to Se-free fungal pellets (56.2 ± 2.8 %) at pH 4.5 and an initial Zn concentration of 10 mg L−1. The enhanced sorption capacity of nSe0-pellets was attributed to a higher concentration of sorption sites resulting in a more negative surface charge density, as determined by analysis of the potentiometric titration data. Fourier transform infrared spectroscopy (FT-IR) analysis of fungal pellets prior to and after being loaded with Zn showed the functional groups, including hydroxyl and carboxyl groups, involved in the sorption process. The experimental data indicated that the sorption rate of the nSe0-pellets fitted well to the pseudo-second order kinetic model (R2 = 0.99), and the sorption isotherm was best represented by the Sips model (Langmuir-Freundlich) with heterogeneous factor n = 1 (R2 = 0.99), which is equivalent to the Langmuir model. Operational advantages of fungal pelleted reactors and the Zn removal efficiencies achieved by nSe0-pellets under mild acidic conditions make nSe0-pellet based bioreactors an efficient biosorption process.

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, Hydraulic and Environmental Engineering (IHE) Inst. for Water Education, Environmental Engineering and Water Technology Department, Université Paris-Est
Contributors: Espinosa-Ortiz, E. J., Shakya, M., Jain, R., Rene, E. R., van Hullebusch, E. D., Lens, P. N. L.
Number of pages: 12
Pages: 21619–21630
Publication date: 2016
Peer-reviewed: Yes

Publication information

Journal: Environmental Science and Pollution Research
Volume: 23
Issue number: 21
ISSN (Print): 0944-1344
Ratings: 
  • Scopus rating (2016): CiteScore 4 SJR 0.891 SNIP 1.127
Original language: English
ASJC Scopus subject areas: Environmental Chemistry, Medicine(all), Pollution, Health, Toxicology and Mutagenesis
Keywords: Fungal pellets, Hybrid biosorbent, Phanerochaete chrysosporium, Selenium nanoparticles, Zinc biosorption
Source: Scopus
Source ID: 84982179903

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

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

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

Viewpoint - Paradigm Shift of Water Services in Finland: From Production Mentality to Service Mindset

In this article, the current management paradigm of water services in Finland is conceptualised. For this purpose, the managers of water utility in ten Finnish municipalities were interviewed. Consequently, the ways in which water services are perceived and managed are also described in this article. In addition, it is argued that the current paradigm produces systemic behaviour that can be considered to give rise to unsustainable ways of developing water services. Based on the problems of the current paradigm, an alternative paradigm is drafted that rethinks the value-creation logic. This alternative paradigm implies that one should be aware of the interactions between systems in which water services play a crucial role, and act accordingly.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O., Takala, A.
Number of pages: 14
Pages: 433-446
Publication date: Oct 2015
Peer-reviewed: Yes

Publication information

Journal: Water Alternatives
Volume: 8
Issue number: 3
ISSN (Print): 1965-0175
Ratings: 
  • Scopus rating (2015): CiteScore 4.5 SJR 0.899 SNIP 1.402
Original language: English

Bibliographical note

Versio ja lupa ok 11.1.2016 /KK

Research output: Contribution to journalArticleScientificpeer-review

The Effect of Phosphorus Exposure on Diesel Oxidation Catalysts-Part II: Characterization of Structural Changes by Transmission Electron Microscopy

Phosphorus poisoning and its effect on the diesel oxidation catalysts morphology was studied by transmission electron microscopy (TEM). The studied catalyst samples were PtPd or Pt supported on the alumina-based washcoat including additives. The laboratory-scale phosphorus exposures were carried out with two different phosphorus concentrations. The cross-sectional TEM samples were prepared from the fresh and phosphorus-treated catalysts. After phosphorus exposures, significant structural changes were observed compared to the fresh catalysts. The shape of the noble metal particles had changed from irregular to more spherical-shaped particles. In addition, phosphorus was detected throughout the catalyst TEM samples but the amount varied depending on the local composition of the support. Phosphorus accumulated mainly in the alumina-containing areas of the support and indications of dense and amorphous aluminium phosphates were found. Based on the results gained, cross-sectional TEM characterization is essential to observe these kinds of morphological changes in the catalysts caused e.g. by phosphorus exposures. In addition, cross-sectional TEM samples are needed to study the effect of local variation in the support composition on the phosphorus accumulation.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Materials Science, Research group: Materials Characterization, Univ Oulu, University of Oulu, Fac Technol Mass & Heat Transfer Proc Engn, Aalto University, Dinex Ecocat Oy
Contributors: Honkanen, M., Kärkkäinen, M., Heikkinen, O., Kallinen, K., Kolli, T., Huuhtanen, M., Lahtinen, J., Keiski, R. L., Lepistö, T., Vippola, M.
Number of pages: 6
Pages: 971-976
Publication date: Oct 2015
Peer-reviewed: Yes

Publication information

Journal: Topics in Catalysis
Volume: 58
Issue number: 14
ISSN (Print): 1022-5528
Ratings: 
  • Scopus rating (2015): CiteScore 4.7 SJR 0.926 SNIP 0.777
Original language: English
Keywords: Diesel oxidation catalyst, Phosphorus poisoning, Structural characterization, Transmission electron microscopy, 3-WAY CATALYST, DEACTIVATION, MECHANISMS, EXHAUST, IMPACT
Source: WOS
Source ID: 000362581900017

Research output: Contribution to journalArticleScientificpeer-review

The Effect of Phosphorus Exposure on Diesel Oxidation Catalysts-Part I: Activity Measurements, Elementary and Surface Analyses

The effects of phosphorus poisoning on the activity of PtPd and Pt diesel oxidation catalysts and on the activity of the support material were investigated using the gas phase laboratory-scale-aging procedure. The catalysts were treated using two different phosphorus concentrations (0.065 and 0.13 mol/L (NH4)(2)HPO). The deactivation was studied by inductively coupled plasma optical emission spectroscopy, electron microscopy, X-ray diffractometry, X-ray photoelectron spectrometry and Fourier-transform infrared reflectance, N-2-physisorption, and activity measurements with CO, C3H6 and NO. The amount of accumulated phosphorus was higher on the Pt catalyst surface than on the PtPd catalyst and significantly higher on the surface of the bare support material. Phosphorus concentration was uniform throughout the support layer (down to the 10 mu m), and phosphorus was found as phosphate, although it can also form compounds like AIPO(4) with the support. The treatment with low phosphorus concentration was found to have a clear deactivation effect only for C3H6 oxidation activity on PtPd catalysts above 200 degrees C. The treatment with high phosphorus concentration significantly decreased the activity of both the PtPd and Pt catalysts. In particular, the C3H6 and NO oxidation activities of the fresh and P-treated Pt catalysts were higher than those of the PtPd catalysts for the entire temperature range.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Materials Science, Research group: Materials Characterization, Univ Oulu, University of Oulu, Fac Technol, Environm & Chem Engn, Aalto University, Dinex Ecocat Oy, Catalyst Res
Contributors: Kärkkäinen, M., Kolli, T., Honkanen, M., Heikkinen, O., Huuhtanen, M., Kallinen, K., Lepistö, T., Lahtinen, J., Vippola, M., Keiski, R. L.
Number of pages: 10
Pages: 961-970
Publication date: Oct 2015
Peer-reviewed: Yes

Publication information

Journal: Topics in Catalysis
Volume: 58
Issue number: 14
ISSN (Print): 1022-5528
Ratings: 
  • Scopus rating (2015): CiteScore 4.7 SJR 0.926 SNIP 0.777
Original language: English
Keywords: Phosphorus, Deactivation, Poisoning, Diesel oxidation catalyst, Platinum, Palladium, NO OXIDATION, THERMAL-STABILITY, DEACTIVATION, REDUCTION, MECHANISMS, BEHAVIOR, EXHAUST
Source: WOS
Source ID: 000362581900016

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

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

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

General information

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

Publication information

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

Bibliographical note

EXT="Çakmakçi, Mehmet"

Source: Scopus
Source ID: 84934932934

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

Short Global History of Fountains

Water fountains are part of every human settlement, and historical and mythological stories. They are the source from which life-sustaining water was distributed to people until piped systems started providing fresh tap water inside buildings. In many places, people visit fountains to experience the freshness of running water, to prepare for prayers, or to make a wish. Fountains have also provided water for the people of cities under siege, and purified believers as part of holy rites. The Castalia shrine in Delphi, Greece, for its part, is a spot where various groups of people come to socialize, which greatly improves the quality of their lives. This paper is a look back through the history of fountains in various parts of the world. Experts from various areas have identified the historic, cultural, and ritualistic aspects of fountains and their findings are summarized. The paper concludes by providing a glimpse into the role of fountains in modern society and their continued influence in our lives today.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Life Cycle Effectiveness of the Built Environment (LCE@BE), NTUA, Dept Architecture Engn, PhDc, Univ Perugia, Dept Phys & Geol, Natl Res Ctr, Water Pollut Res Dept, Univ Salerno, Dept Ind Engn, Yunnan Acad Social Sci, Federutility, Natl Fdn Agr Res NAGREF, Inst Irakl, University of Tampere, Former organisation of the author
Contributors: Juuti, P. S., Antoniou, G. P., Dragoni, W., El-Gohary, F., De Feo, G., Katko, T. S., Rajala, R. P., Zheng, X. Y., Drusiani, R., Angelakis, A. N.
Number of pages: 35
Pages: 2314-2348
Publication date: May 2015
Peer-reviewed: Yes

Publication information

Journal: Water
Volume: 7
Issue number: 5
ISSN (Print): 2073-4441
Ratings: 
  • Scopus rating (2015): CiteScore 1.9 SJR 0.53 SNIP 1.057
Original language: English
Keywords: Chinese civilizations, Egyptians, Etruscans, Minoans, Hellenes, Medieval times, Ottomans, Romans, water distribution, water supply systems, URBAN WATER, SYSTEMS

Bibliographical note

EXT="Juuti, Petri S."
EXT="Rajala, Riikka P."

Source: WOS
Source ID: 000356935900013

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

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

Appropriate pricing policy needed worldwide for improving water services infrastructure

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

Tighter contracts or more trust? Outsourcing in Finnish water utilities

This article discusses the outsourcing of water utility operations and the prerequisites for successful partnerships between water utilities and external service providers. A questionnaire survey in Finland indicated that the outsourcing of various water utility operations will increase in the future. This trend includes great opportunities to utilize the best features of external service providers and efficiently develop the water services sector. However, the outsourcing also includes risks because there is a lack of trust between water utilities and private companies. Therefore, “hard,” rigid contracts are preferred to reduce the uncertainty in outsourcing such undertakings. In uncertain conditions, this approach may not be an effective and fruitful development path in the long term. If relationships are more trust based, uncertainty can actually strengthen these relationships. Thus, more attention should be paid to building trust instead of intensively attempting to reduce uncertainty.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Life Cycle Effectiveness of the Built Environment (LCE@BE)
Contributors: Heino, O., Katko, T. S., Pietilä, P. E.
Number of pages: 19
Pages: 360-378
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Public Works Management and Policy
Volume: 20
Issue number: 4
ISSN (Print): 1087-724X
Ratings: 
  • Scopus rating (2015): CiteScore 0.9 SJR 0.242 SNIP 0.41
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-12-12<br/>Publisher name: Sage Publications, Inc.

Source: researchoutputwizard
Source ID: 441

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

Social Norms in Water Services: Exploring the Fair Price of Water

The aim of this article is to analyse price fairness in water services. Although a considerable amount of literature has been published on water pricing, these studies have mainly approached the question from instrumental and rational perspectives. Little attention has been paid to the human side of water pricing. Therefore, the general objective of this research is to shed light on these softer factors, filling the gap in knowledge of the emotional connections with water services. In this research, we explored people’s ideas and views about water pricing by conducting 74 interviews in 11 municipalities in Finland. The results suggest that people are not just rational consumers of a good but also have emotional ties to water utilities and municipal decision-making. The general attitude towards a water utility is confident and sympathetic if its operations and municipal decision-making processes are considered as fair, and vice versa. This is a topical issue as many water utilities are facing pressures to increase water prices; being fair appeared to be crucial way to gain appreciation and support through difficult times. Because fairness seems to be an emergent property of social experiences, special attention should be paid to the “soft side” of water services.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O., Takala, A.
Number of pages: 15
Pages: 844-858
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Water Alternatives
Volume: 8
Issue number: 1
ISSN (Print): 1965-0175
Ratings: 
  • Scopus rating (2015): CiteScore 4.5 SJR 0.899 SNIP 1.402
Original language: English
Keywords: Water services, Water pricing, Price fairness, Social Norms, Finland

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

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

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

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

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

Utility–Customer Communication: The Case of Water Utilities

The aim of this article is to shed light on the theory and praxis of utility stakeholder communication. Our general research objective is to contrast citizens’ experiences of utility-specific information needs with the views of communication managers of municipal water utilities. Empirical data for the study were gathered using two methods. Citizens’ views were gathered from street interviews in several Finnish middle-sized cities, whereas the views of communication professionals of municipal water utilities were collected via email-based survey. Empirical analysis shows that one-way communication has its relevance, and it should actually be improved most notably in exceptional situations, such as water supply disruptions. More profound changes in customer communication require, however, that utilities support customers’ strive for sustainable and economical water consumption. The overall challenge to utilities is to get closer to the everyday needs of their customers and to develop new communication culture to support such an endeavor.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, University of Tampere
Contributors: Heino, O., Anttiroiko, A.
Pages: 220-230
Publication date: 2015
Peer-reviewed: Yes
Early online date: 22 Sep 2015

Publication information

Journal: Public Works Management and Policy
Volume: 21
Issue number: 3
ISSN (Print): 1087-724X
Ratings: 
  • Scopus rating (2015): CiteScore 0.9 SJR 0.242 SNIP 0.41
Original language: English

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

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

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

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

General information

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

Publication information

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

Research output: Contribution to journalArticleScientificpeer-review

Konvergenssi ja divergenssi ongelmatyyppien luonnehtijoina: Esimerkkinä vesihuoltoinfrastruktuurin ikääntyminen

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O.
Number of pages: 8
Pages: 39-46
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Tiedepolitiikka
Volume: 40
Issue number: 3
ISSN (Print): 0782-0674
Original language: Finnish

Research output: Contribution to journalArticleScientificpeer-review

Resilient Asset Management and Governance Fordeteriorating Water Services Infrastructure

This paper argues that strategic asset management and a sound regulatory regime are required urgently if we want to change the current paradigm of aging and decaying water services infrastructure and expand the coverage of improved water services in the developing economies. In the OECD countries access to safe water supply and sanitation has largely been ensured through substantial investment over many decades. Yet, significant investments will still be required to rehabilitate the existing infrastructures, to bring them into conformity with more stringent environmental and health regulations, and to maintain service quality in the future. In the non-OECD countries the challenges are more daunting. Large parts of their population have no access and many suffer from unsatisfactory services. Nearly one billion people lack access to clean drinking water and 2.6 billion people lack access to improved sanitation services.Lack of sound economic regulatory frameworks and enforcement regimes, and poor asset management practices, in particular underpricing of water services is a common problem throughout the world.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering, Department of Chemistry and Bioengineering
Contributors: Hukka, J. J., Katko, T. S.
Number of pages: 8
Pages: 112-119
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Procedia Economics and Finance
Volume: 21
ISSN (Print): 2212-5671
Original language: English
Keywords: aging and deteriorating water services infrastructure, investment gap, strategic asset management, regulatory and enforcement framework, sustainability.
Source: RIS
Source ID: urn:B63C341C3AC1323B613E64632E9D1135

Research output: Contribution to journalArticleScientificpeer-review

Kohti tasapuolisempaa tutkimuksen arviointia: Pääkirjoitus

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Civil Engineering
Contributors: Katko, T. S.
Number of pages: 2
Pages: 4-5
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Ympäristöhistoria: Finnish Journal of Environmental History
Volume: 5
Issue number: 1
ISSN (Print): 1799-6953
Original language: Finnish

Research output: Contribution to journalArticleScientificpeer-review

Importance and challenges of sharing experiences among an international and interdisciplinary group of doctoral students

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry
Contributors: Kurki, V., Sidaraviciute, R., Sörensen, J., Kibocha, S. N., Retike, I., Ikobe, G., Tichonovas, M., Elijosiute, E., Rajala, R.
Number of pages: 7
Pages: 45-51
Publication date: 2015
Peer-reviewed: Yes

Publication information

Journal: Ympäristöhistoria: Finnish Journal of Environmental History
Issue number: 1/2015
ISSN (Print): 1799-6953
Original language: English

Bibliographical note

EXT="Kibocha, Samuel Ngari"
EXT="Rajala, Riikka"

Research output: Contribution to journalArticleScientificpeer-review

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

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

Inhibitory effects of substrate and soluble end products on biohydrogen production of the alkalithermophile Caloramator celer: Kinetic, metabolic and transcription analyses

In this study the tolerance of the alkalithermophile Caloramator celer towards substrate (glucose) and soluble end product (acetate, formate and ethanol) inhibition was assessed employing nonlinear inhibition models. In addition, the effects of subinhibitory concentrations of end products on fermentative metabolism and regulation of 12 key genes involved in pyruvate catabolism were studied. Optimal growth and H2 production were found at 50 mM of glucose and the critical substrate concentration was observed at 290-360 mM. Two inhibition models revealed that ethanol had a higher inhibitory effect on growth rate, whereas H2 production kinetics was more sensitive towards increasing concentrations of acetate and formate. Acetate, the main soluble metabolite of the fermentation, inhibited the H2 production by increasing the ionic strength in the medium. Subinhibitory concentrations of soluble end products induced changes in the metabolite profile of C. celer, specifically exogenous acetate (80 mM) and ethanol (40 mM) slightly increased the H2 yield by 4 and 7%, respectively. However, despite the observed metabolic shifts, gene regulation was minimal and not always in agreement with the measured product yields. Overall, the results suggest that further optimization of the H2 production process from C. celer should focus on methods to evolve adapted osmotolerant strains and/or remove soluble metabolites, especially acetate, from the culture. Copyright © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Research group: Industrial Bioengineering and Applied Organic Chemistry, Urban circular bioeconomy (UrCirBio)
Contributors: Ciranna, A., Ferrari, R., Santala, V., Karp, M.
Number of pages: 11
Pages: 6391-6401
Publication date: 15 Apr 2014
Peer-reviewed: Yes

Publication information

Journal: International Journal of Hydrogen Energy
Volume: 39
Issue number: 12
ISSN (Print): 0360-3199
Ratings: 
  • Scopus rating (2014): CiteScore 5.6 SJR 1.207 SNIP 1.488
Original language: English
ASJC Scopus subject areas: Renewable Energy, Sustainability and the Environment, Fuel Technology, Condensed Matter Physics, Energy Engineering and Power Technology
Keywords: Acetate, Dark fermentation, End product inhibition, Gene expression, Kinetic model, Substrate inhibition

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-04-29<br/>Publisher name: Elsevier Ltd; International Association for Hydrogen Energy

Source: researchoutputwizard
Source ID: 235

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Bibliographical note

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

Source: researchoutputwizard
Source ID: 236

Research output: Contribution to journalArticleScientificpeer-review

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

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

Metabolic engineering of Acinetobacter baylyi ADP1 for improved growth on gluconate and glucose

A high growth rate in bacterial cultures is usually achieved by optimizing growth conditions, but metabolism of the bacterium limits the maximal growth rate attainable on the carbon source used. This limitation can be circumvented by engineering the metabolism of the bacterium. Acinetobacter baylyi has become a model organism for studies of bacterial metabolism and metabolic engineering due to its wide substrate spectrum and easy-to-engineer genome. It produces naturally storage lipids, such as wax esters, and has a unique gluconate catabolism as it lacks a gene for pyruvate kinase. We engineered the central metabolism of A. baylyi ADP1 more favorable for gluconate catabolism by expressing the pyruvate kinase gene (pykF) of Escherichia coli. This modification increased growth rate when cultivated on gluconate or glucose as a sole carbon source in a batch cultivation. The engineered cells reached stationary phase on these carbon sources approximately twice as fast as control cells carrying an empty plasmid and produced similar amount of biomass. Furthermore, when grown on either gluconate or glucose, pykF expression did not lead to significant accumulation of overflow metabolites and consumption of the substrate remained unaltered. Increased growth rate on glucose was not accompanied with decreased wax ester production, and the pykF-expressing cells accumulated significantly more of these storage lipids with respect to cultivation time.

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)
Contributors: Kannisto, M., Aho, T., Karp, M., Santala, V.
Number of pages: 7
Pages: 7021-7027
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Applied and Environmental Microbiology
Volume: 80
Issue number: 22
ISSN (Print): 0099-2240
Ratings: 
  • Scopus rating (2014): CiteScore 7.4 SJR 1.872 SNIP 1.394
Original language: English
ASJC Scopus subject areas: Applied Microbiology and Biotechnology, Food Science, Biotechnology, Ecology, Medicine(all)

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-11-20<br/>Publisher name: American Society for Microbiology

Source: researchoutputwizard
Source ID: 650

Research output: Contribution to journalArticleScientificpeer-review

Influence of temperature and pretreatments on the anaerobic digestion of wastewater grown microalgae in a laboratory-scale accumulating-volume reactor

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Kinnunen, V., Craggs, R., Rintala, J.
Number of pages: 11
Pages: 247-257
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Water Research
Volume: 57
Ratings: 
  • Scopus rating (2014): CiteScore 9.7 SJR 2.946 SNIP 2.688
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-05-06<br/>Publisher name: I W A Publishing; Water Quality Association

Source: researchoutputwizard
Source ID: 726

Research output: Contribution to journalArticleScientificpeer-review

The effect of torrefaction on the chlorine content and heating value of eight woody biomass samples

This study examined and compared the effect of torrefaction on the heating value, elementary composition, and chlorine content of eight woody biomasses. The biomass samples were torrefied in a specially constructed batch reactor at 260 °C for 30, 60, and 90 min. The original biomasses as well as the solid, liquid, and gaseous torrefaction reaction products were analyzed separately. The higher heating values (HHV) of dry samples increased from 19.5–21.0 MJ  kg−1 to 21.2–23.2 MJ  kg−1 during 60 min of torrefaction. In all samples, the HHV increased 9 % on average. Furthermore, the effect of torrefaction time on the biomass HHV was studied. Measurements showed that after a certain point, increasing the torrefaction time had no effect on the samples' HHV. This optimal torrefaction time varied considerably between the samples. For more reactive biomasses, i.e., birch and aspen, the optimal torrefaction time was close 30 min whereas the HHV of less reactive biomasses, e.g., stumps, increased markedly even after a 60-min torrefaction. Another significant observation was that torrefaction reduced the chlorine content of the biomass samples. The chlorine concentration of the solid product dropped in most samples from the original by half or even as much as 90 %. The highest relative chlorine decrease was observed in the Eucalyptus dunnii sample, which also had the highest chlorine content of all the studied biomasses. The relative carbon content of the biomass samples increased during torrefaction as the average elementary composition changed from CH0.123O0.827 to CH0.105O0.674 after a 60-min torrefaction.

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)
Contributors: Keipi, T., Tolvanen, H., Kokko, L., Raiko, R.
Number of pages: 8
Pages: 232-239
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Biomass & Bioenergy
Volume: 66
ISSN (Print): 0961-9534
Ratings: 
  • Scopus rating (2014): CiteScore 7.3 SJR 1.865 SNIP 1.973
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-05-28<br/>Publisher name: Pergamon; Imprint: Elsevier

Source: researchoutputwizard
Source ID: 698

Research output: Contribution to journalArticleScientificpeer-review

Lähteet Suomen vesihuollossa

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Katko, T., Juuti, P. S.
Number of pages: 4
Pages: 15-18
Publication date: 2014
Peer-reviewed: Yes

Publication information

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

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-10-07

Source: researchoutputwizard
Source ID: 677

Research output: Contribution to journalArticleScientificpeer-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

Inverse infrastructures: self-organization in the water services

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O., Anttiroiko, A.
Number of pages: 17
Pages: 299-315
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Water Policy
ISSN (Print): 1366-7017
Ratings: 
  • Scopus rating (2014): CiteScore 1.8 SJR 0.46 SNIP 0.771
Original language: English

Bibliographical note

siirretään 2015 : Water Policy In Press, Uncorrected Proof © IWA Publishing 2014 doi:10.2166/wp.2014.095<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2015-01-15

Source: researchoutputwizard
Source ID: 439

Research output: Contribution to journalArticleScientificpeer-review

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

E-sail test payload of the ESTCube-1 nanosatellite

General information

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

Publication information

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

Bibliographical note

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

Source: researchoutputwizard
Source ID: 285

Research output: Contribution to journalArticleScientificpeer-review

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

General information

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

Publication information

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

Bibliographical note

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

Source: researchoutputwizard
Source ID: 178

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Bibliographical note

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

Source: researchoutputwizard
Source ID: 629

Research output: Contribution to journalArticleScientificpeer-review

Long-term thermophilic mono-digestion of rendering wastes and co-digestion with potato pulp

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Urban circular bioeconomy (UrCirBio)
Contributors: Bayr, S., Ojanperä, M., Kaparaju, P., Rintala, J.
Number of pages: 7
Pages: 1853-1859
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Waste Management
Volume: 34
Issue number: 10
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: 2014-09-30<br/>Publisher name: Pergamon

Source: researchoutputwizard
Source ID: 157

Research output: Contribution to journalArticleScientificpeer-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

Kohti hajautettua infrastruktuuripolitiikkaa? Paikalliset vesiosuuskunnat perusrakenteiden tuottajina

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, University of Tampere
Contributors: Heino, O., Anttiroiko, A.
Number of pages: 13
Pages: 38-50
Publication date: 2014
Peer-reviewed: Yes

Publication information

Journal: Maaseudun uusi aika
Volume: 22
Issue number: 3
ISSN (Print): 1237-413X
Original language: Finnish

Research output: Contribution to journalArticleScientificpeer-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

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

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

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

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

Pollutants source control and health effects

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Kelishadi, R., Amin, M. M., Haghdoost, A. A., Gupta, A. K., Tuhkanen, T. A.
Number of pages: 2
Pages: 1-2
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: Journal of Environmental and Public Health
Volume: 2013
Article number: 209739
ISSN (Print): 1687-9805
Ratings: 
  • Scopus rating (2013): CiteScore 1.9 SJR 0.638 SNIP 0.925
Original language: English

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-12-29<br/>Publisher name: Hindawi

Source: researchoutputwizard
Source ID: 2539

Research output: Contribution to journalArticleScientificpeer-review

Halpaa eli hyvää - minkälaisia merkityksiä vesihuoltoala rakentaa itsestään

General information

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

Publication information

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

Bibliographical note

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

Source: researchoutputwizard
Source ID: 2275

Research output: Contribution to journalArticleScientificpeer-review

Käänteiset infrastruktuurit ja integroiva infrastruktuuripolitiikka

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Anttiroiko, A., Heino, O.
Number of pages: 14
Pages: 30-43
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: Yhdyskuntasuunnittelu
Volume: 51
Issue number: 3
ISSN (Print): 1459-6806
Original language: Finnish

Bibliographical note

Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2014-12-30<br/>Publisher name: Yhdyskuntasuunnittelun Seura

Source: researchoutputwizard
Source ID: 1932

Research output: Contribution to journalArticleScientificpeer-review

Managed aquifer recharge in community water supply: the Finnish experience and some international comparisons

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Life Cycle Effectiveness of the Built Environment (LCE@BE)
Contributors: Kurki, V., Lipponen, A., Katko, T.
Number of pages: 16
Pages: 774-789
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: Water International
Volume: 38
Issue number: 6
ISSN (Print): 0250-8060
Ratings: 
  • Scopus rating (2013): CiteScore 1.7 SJR 0.503 SNIP 0.565
Original language: English

Bibliographical note

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

Source: researchoutputwizard
Source ID: 2661

Research output: Contribution to journalArticleScientificpeer-review

Testing activity-based costing to large-scale combined heat and power plant using bioenergy

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Korpunen, H., Raiko, R.
Number of pages: 11
Pages: 1-11
Publication date: 2013
Peer-reviewed: Yes

Publication information

Journal: International Journal of Energy Research
ISSN (Print): 0363-907X
Ratings: 
  • Scopus rating (2013): CiteScore 4.2 SJR 1.043 SNIP 1.666
Original language: English

Bibliographical note

ei vielä UT 2013-09-19 : This article was published online on [29 April 2013].Errors were subsequently identified in Table V.This notice is included in the online and print versions to indicate that both have been corrected [14 June 2013]<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-09-29<br/>Publisher name: John Wiley & Sons Ltd.

Source: researchoutputwizard
Source ID: 2622

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

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

General information

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

Publication information

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

Bibliographical note

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

Source: researchoutputwizard
Source ID: 4531

Research output: Contribution to journalArticleScientificpeer-review

Occupational Exposure to Electric Fields and Currents Associated With 110 kv Substation Tasks

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Kuisti, H. A., Tarao, H., Elovaara, J. A.
Pages: 438-442
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Bioelectromagnetics
Volume: 33
Issue number: 5
ISSN (Print): 0197-8462
Ratings: 
  • Scopus rating (2012): CiteScore 4.2 SJR 0.628 SNIP 1.155
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1<br/>Publisher name: Wiley Periodicals, Inc

Source: researchoutputwizard
Source ID: 4530

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

Water - The Most Important Subject of the World

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Heino, O., Takala, A., Vihanta, J.
Number of pages: 15
Pages: 44-58
Publication date: 2012
Peer-reviewed: Yes

Publication information

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

Bibliographical note

ei ut-numeroa 13.8.2013<br/>Contribution: organisation=keb,FACT1=1<br/>Portfolio EDEND: 2013-07-29

Source: researchoutputwizard
Source ID: 4197

Research output: Contribution to journalArticleScientificpeer-review

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

Impacts of changing operational parameters of in situ chemical oxidation (ISCO) on removal of aged PAHs from soil

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Cajal-Marinosa, P., de la Calle, R., Rivas, F. J., Tuhkanen, T.
Pages: 429-436
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Journal of Advanced Oxidation Technologies
Volume: 15
Issue number: 2
ISSN (Print): 1203-8407
Ratings: 
  • Scopus rating (2012): CiteScore 1.4 SJR 0.408 SNIP 0.495
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: Science & Technology Integration,

Source: researchoutputwizard
Source ID: 3951

Research output: Contribution to journalArticleScientificpeer-review

Insentiivit julkisen sektorin innovaatiotoiminnan edistämisen välineinä. Esimerkkinä Georgian osavaltion palvelu-uudistus

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Anttiroiko, A., Heino, O.
Number of pages: 8
Pages: 298-305
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Työelämän tutkimus
Volume: 10
Issue number: 3
ISSN (Print): 0788-091X
Original language: Finnish

Bibliographical note

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

Source: researchoutputwizard
Source ID: 3857

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Bibliographical note

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

Source: researchoutputwizard
Source ID: 4534

Research output: Contribution to journalArticleScientificpeer-review

White-Collar Workers' Self-Reported Physical Symptoms Associated With Using Computers

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Pääkkönen, R., Gobba, F.
Pages: 137-147
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: International Journal of Occupational Safety and Ergonomics
Volume: 18
Issue number: 2
ISSN (Print): 1080-3548
Ratings: 
  • Scopus rating (2012): CiteScore 1 SJR 0.343 SNIP 0.684
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1<br/>Publisher name: Centralny Instytut Ochrony Pracy Central Institute for Labour Protection / Poland

Source: researchoutputwizard
Source ID: 4535

Research output: Contribution to journalArticleScientificpeer-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

Treatment of Composted Soils contaminated with Petroleum Hydrocarbons using Chemical Oxidation followed by Enhanced Aerobic Bioremediation

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Cajal-Marinosa, P., Reich, O., Mobes, A., Tuhkanen, T.
Pages: 217-223
Publication date: 2012
Peer-reviewed: Yes

Publication information

Journal: Journal of Advanced Oxidation Technologies
Volume: 15
Issue number: 1
ISSN (Print): 1203-8407
Ratings: 
  • Scopus rating (2012): CiteScore 1.4 SJR 0.408 SNIP 0.495
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1<br/>Publisher name: Science & Technology Integration

Source: researchoutputwizard
Source ID: 3952

Research output: Contribution to journalArticleScientificpeer-review

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

General information

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

Publication information

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

Bibliographical note

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

Source: researchoutputwizard
Source ID: 4515

Research output: Contribution to journalArticleScientificpeer-review

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

Occupational Exposure to Electric and Magnetic Fields While Working at Switching and Transforminig Stations of 110 kV

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Kuisti, H., Pääkkönen, R., Vanhala, P., Elovaara, J.
Pages: 526-536
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: Annals of Occupational Hygiene
Volume: 55
Issue number: 5
ISSN (Print): 0003-4878
Ratings: 
  • Scopus rating (2011): CiteScore 3.4 SJR 1.194 SNIP 1.59
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 6418

Research output: Contribution to journalArticleScientificpeer-review

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

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

General information

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

Publication information

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

Bibliographical note

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

Source: researchoutputwizard
Source ID: 6062

Research output: Contribution to journalArticleScientificpeer-review

Working-aged population's mental symptoms and the use of the Internet

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Pääkkönen, R.
Pages: 25-28
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: Mental Illness
Volume: 3
Issue number: 1
ISSN (Print): 2036-7457
Ratings: 
  • Scopus rating (2011): SJR 0.338 SNIP 0.288
Original language: English

Bibliographical note

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

Source: researchoutputwizard
Source ID: 6422

Research output: Contribution to journalArticleScientificpeer-review

Hyvän veden ja hyvien yhteyksien kaupunki - Riihimäen Veden historia

General information

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

Publication information

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

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 6248

Research output: Contribution to journalArticleScientificpeer-review

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

Occupational exposure to electric fields and induced currents associated with 400 kV substation tasks from different service platforms

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Elovaara, J. A., Kuisti, H. A.
Pages: 79-83
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: Bioelectromagnetics
ISSN (Print): 0197-8462
Ratings: 
  • Scopus rating (2011): CiteScore 4.5 SJR 0.539 SNIP 1.223
Original language: English

Bibliographical note

Poistettu tupla r=3246<br/>Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 6417

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

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

Physical symptoms in young adults and their use of different computers and mobile phones

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Pääkkönen, R.
Pages: 361-371
Publication date: 2011
Peer-reviewed: Yes

Publication information

Journal: International Journal of Occupational Safety and Ergonomics
Volume: 17
Issue number: 4
ISSN (Print): 1080-3548
Ratings: 
  • Scopus rating (2011): CiteScore 0.7 SJR 0.274 SNIP 0.579
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 6421

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

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

Self-reported use of ICT (Information and communication technology) uptake in 2002 and discomfort amongst Finns aged 45-66

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Pääkkönen, R.
Pages: 85-90
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Applied Ergonomics
Issue number: 42
ISSN (Print): 0003-6870
Ratings: 
  • Scopus rating (2010): SJR 0.885 SNIP 1.743
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 8438

Research output: Contribution to journalArticleScientificpeer-review

Integration of water and wastewater utilities

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Katko, T. S., Kurki, V. O., Juuti, P. S., Rajala, R. P., Seppälä, O. T.
Pages: 62-70
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Journal American Water Works Association
Volume: 102
Issue number: 9
ISSN (Print): 0003-150X
Ratings: 
  • Scopus rating (2010): SJR 0.429 SNIP 0.773
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8314

Research output: Contribution to journalArticleScientificpeer-review

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

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

Occupational exposure to electric and magnetic fields during work tasks at 110 kV substations in the Tampere region

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Pääkkönen, R.
Pages: 252-254
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Bioelectromagnetics
Volume: 31
Issue number: 3
ISSN (Print): 0197-8462
Ratings: 
  • Scopus rating (2010): SJR 0.827 SNIP 1.251
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 8437

Research output: Contribution to journalArticleScientificpeer-review

Water and the city

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering, Former organisation of the author
Contributors: Katko, T. S., Juuti, P., Tempelhoff, J.
Pages: 213-234
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: 8313

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

Towards balanced public-private co-operation in urban water management

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Hukka, J. J., Katko, T. S., Pietilä, P. E., Seppälä, O. T.
Pages: 71-81
Publication date: 2010
Peer-reviewed: Yes

Publication information

Journal: Journal of Management & Public Policy
Volume: 2
Issue number: 1
ISSN (Print): 0976-013X
Original language: English

Bibliographical note

Contribution: organisation=keb bio,FACT1=1

Source: researchoutputwizard
Source ID: 8110

Research output: Contribution to journalArticleScientificpeer-review

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

General information

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

Publication information

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

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 8075

Research output: Contribution to journalArticleScientificpeer-review

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

The designing and the implementation of WWW-course &wuot;Electricity, Electronics and Environment&wuot;

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Koskiranta, M., Lehtelä, R., Vesapuisto, M., Tepsa, K., Puro, H.
Pages: 75-78
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: 8436

Research output: Contribution to journalArticleScientificpeer-review

Water, policy and governance

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Chemistry and Bioengineering
Contributors: Hukka, J. J., Castro, J. E., Pietilä, P. E.
Pages: 235-251
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: 8109

Research output: Contribution to journalArticleScientificpeer-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

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

General information

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

Publication information

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

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 7971

Research output: Contribution to journalArticleScientificpeer-review

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

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

Mental symptoms and the use of new technical equipment

General information

Publication status: Published
MoE publication type: A1 Journal article-refereed
Organisations: Department of Energy and Process Engineering
Contributors: Korpinen, L., Pääkkönen, R.
Pages: 385-400
Publication date: 2009
Peer-reviewed: Yes

Publication information

Journal: International Journal of Occupational Safety and Ergonomics
Volume: 15
Issue number: 4
ISSN (Print): 1080-3548
Ratings: 
  • Scopus rating (2009): SJR 0.284 SNIP 0.688
Original language: English

Bibliographical note

Contribution: organisation=epr,FACT1=1

Source: researchoutputwizard
Source ID: 10519

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

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

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

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

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