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Marika Kokko
Tampere University of Technology
21Publications
6H-index
147Citations
Publications 21
Newest
#1Paolo Dessì (National University of Ireland, Galway)H-Index: 5
#2Pritha Chatterjee (IITH: Indian Institute of Technology, Hyderabad)H-Index: 6
Last.Piet N.L. Lens (National University of Ireland, Galway)H-Index: 43
view all 7 authors...
Abstract The microbial communities developed from a mixed-species culture in up-flow and flow-through configurations of thermophilic (55 °C) microbial fuel cells (MFCs), and their power production from acetate, were investigated. The up-flow MFC was operated for 202 days, obtaining an average power density of 0.13 W/m3, and Tepidiphilus was the dominant transcriptionally-active microorganisms. The planktonic community developed in the up-flow MFC was used to inoculate a flow-through MFC resultin...
Abstract Facilitating anaerobic degradation of long-chain fatty acids (LCFA) is key for tapping the high methane production potential of the fats, oil and grease (FOG) content of dairy wastewaters. In this study, the feasibility of using high-rate granular sludge reactors for the treatment of mixed LCFA-containing synthetic dairy wastewater (SDW) was assessed at 20 °C. The effects of the LCFA concentration (33–45% of COD) and organic loading rates (2–3 gCOD/L·d) were determined using three paral...
#1Johanna M. Haavisto (Sciences Po)H-Index: 3
#2Paolo Dessì (National University of Ireland, Galway)H-Index: 5
Last.Jaakko A. Puhakka (Sciences Po)H-Index: 40
view all 9 authors...
Abstract The aim of this study was to determine an optimal anode material for electricity production and COD removal from xylose containing synthetic wastewater in an up-flow microbial fuel cell (MFC), and assess its suitability for treatment of thermomechanical pulping (TMP) wastewater with an enrichment culture at 37 °C. The anode materials tested included carbon-based electrodes (graphite plate, carbon cloth and zeolite coated carbon cloth), metal-based electrodes (tin coated copper) and a me...
#1Pritha Chatterjee (IITH: Indian Institute of Technology, Hyderabad)H-Index: 6
#2Paolo Dessì (National University of Ireland, Galway)H-Index: 5
Last.Piet N.L. Lens (National University of Ireland, Galway)H-Index: 43
view all 5 authors...
Abstract Microbial electrochemical technologies (MET), also known as bioelectrochemical systems (BES), use microorganisms as biocatalysts to recover valuable resources like bioelectricity, hydrogen, nutrients, metals, and industrial chemicals from wastes and wastewaters. MET are therefore expected to play a key role in waste management and reduction of the carbon footprint in the near future. However, considerable fundamental and technological challenges still need to be addressed before using M...
#1Suniti SinghH-Index: 1
Last.Jukka RintalaH-Index: 48
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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 ...
#1Pritha Chatterjee (UTA: University of Tampere)H-Index: 6
#2Marianna Granatier (Aalto University)H-Index: 1
Last.Jukka RintalaH-Index: 48
view all 6 authors...
Abstract 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 Sc...
#1Pritha Chatterjee (TUT: Tampere University of Technology)H-Index: 6
#2Leija Lahtinen (TUT: Tampere University of Technology)H-Index: 1
Last.Jukka Rintala (TUT: Tampere University of Technology)H-Index: 48
view all 4 authors...
Abstract Anaerobic treatment of sedimented fibers collected from bottom of a bay that had been receiving pulp and paper mill wastewater for about 70 years were studied for the first time in semi-continuously fed continuously stirred tank reactors (CSTR). Anaerobic treatment of the fiber sediment was shown to be feasible, without dilution and with nitrogen and buffer supplement, at organic loading rates (OLR) up to 2.5 kg VS/m3d and hydraulic retention times (HRT) of 60 d resulting in methane yiel...
#1Marika Kokko (TUT: Tampere University of Technology)H-Index: 6
#2Veera Koskue (TUT: Tampere University of Technology)H-Index: 1
Last.Jukka Rintala (TUT: Tampere University of Technology)H-Index: 48
view all 3 authors...
Abstract Since the 1980s, the pulp and paper industry in Finland has resulted in the accumulation of fibres in lake sediments. One such site in Lake Nasijarvi contains approximately 1.5 million m3 sedimented fibres. In this study, the methane production potential of the sedimented fibres (on average 13% total solids (TS)) was determined in batch assays. Furthermore, the methane production from solid (on average 20% TS) and liquid fractions of sedimented fibres after solid-liquid separation was s...
#1Mira L.K. Sulonen (TUT: Tampere University of Technology)H-Index: 5
#2Marika Kokko (TUT: Tampere University of Technology)H-Index: 6
Last.Jaakko A. Puhakka (TUT: Tampere University of Technology)H-Index: 40
view all 4 authors...
Abstract This study demonstrates (bio)electrochemical tetrathionate (S4O62 −) degradation with simultaneous elemental copper recovery from simulated acidic mining water. The effect of applied external voltage on anodic tetrathionate removal, cathodic copper removal and current density was studied using two-chamber flow-through bioelectrochemical (MEC) and abiotic electrochemical (EC) systems. At low applied cell voltages (≤ 0.5 V), the highest tetrathionate removal rate (150–170 mg L− 1 d− 1) an...
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