Trepo - Selaus tekijän mukaan "Puhakka, Jaakko A."
Viitteet 1-20 / 20
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Anaerobes in bioelectrochemical systems
Advances in Biochemical Engineering/Biotechnology (2016)
chapterIn bioelectrochemical systems (BES), the catalytic activity of anaerobic microorganisms generates electrons at the anode which can be used, for example, for the production of electricity or chemical compounds. BES can be ... -
The effect of anode potential on bioelectrochemical and electrochemical tetrathionate degradation
(08.02.2016)
articleThe 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 ... -
Effect of hydraulic retention time on continuous electricity production from xylose in up-flow microbial fuel cell
(01.11.2017)
article<p>Aerobic wastewater management is energy intensive and thus anaerobic processes are of interest. In this study, a microbial fuel cell was used to produce electricity from xylose which is an important constituent ... -
The effect of start-up on energy recovery and compositional changes in brewery wastewater in bioelectrochemical systems
(01.04.2019)
article<p>Start-up of bioelectrochemical systems (BESs) fed with brewery wastewater was compared at different adjusted anode potentials (−200 and 0 mV vs. Ag/AgCl) and external resistances (50 and 1000 Ω). Current generation ... -
Effects of anode potentials on bioelectrogenic conversion of xylose and microbial community compositions
(05.09.2015)
article<p>The results on the effects of different anode potentials on current densities, coulombic efficiencies and microbial communities are contradictory and have not been studied with xylose, an important constituent of ... -
Effects of elevated pressures on the activity of acidophilic bioleaching microorganisms
(15.10.2019)
article<p>This study reports effects of elevated pressures on the oxidation of a soluble ferrous iron and low-grade sulphidic ore as little is known about biological iron and sulphur oxidation under these conditions. Pressure ... -
Effects of metal extraction liquors from electric vehicle battery materials production on iron and sulfur oxidation by heap bioleaching microorganisms
(15.03.2022)
article<p>This study reports the effects of metal extraction liquors that are used for production of electric vehicle batteries on biological iron and sulfur oxidation. These liquors include ammonium sulfate and organic ... -
Elemental sulphur production from thiosulphate under haloalkaline conditions in a Thioalkalivibrio versutus amended fluidized bed bioreactor
(08 / 2021)
article<p>Concentrated sulphurous and saline streams, produced for example by pulp and paper and petrochemical industries, pose challenges for both environmental and processes management. In this study, the potential of ... -
High tolerance of chemolithoautotrophic sulphur oxidizing bacteria towards pulp and paper mill wastewaters and their organic constituents supporting sulphur recovery in alkaline conditions
(15.12.2022)
article<p>This study reports the tolerance of chemolithoautotrophic biotransformation of sulphurous compounds towards pulp and paper (P&P) mill wastewaters (primary filtrate of bleaching (PFB) and composite wastewater ... -
High-rate and -yield continuous fluidized-bed bioconversion of glucose-to-gluconic acid for enhanced metal leaching
(2023)
articleContinuous low-cost bulk biolixiviant production remains as one of the main challenges of heterotrophic bioleaching towards large scale application. This study aimed at developing non-aseptic Gluconobacter oxydans-amended ... -
Increase in sedimentary organic carbon with a change from hypoxic to oxic conditions
(07 / 2021)
article<p>In the Seto Inland Sea, Japan, chemical oxygen demand has increased over recent decades, while average dissolved oxygen concentrations in the bottom water have increased. In this study, we investigated responses ... -
Indirect in situ bioleaching is an emerging tool for accessing deeply buried metal reserves, but can the process be managed? – A case study of copper leaching at 1 km depth
(11 / 2023)
article<p>Copper is a strategic raw material widely needed for electrification. One possibility to diversify the supply to answer the market demand is to produce copper with in situ technology. In this study, feasibility ... -
Kinetics and modelling of thiosulphate biotransformations by haloalkaliphilic Thioalkalivibrio versutus
(2020)
article<p>Biotransformation of thiosulphate by Thioalkalivibrio versutus was studied under haloalkaline conditions (pH 10, 0.66–1.2 M Na<sup>+</sup>) using batch assays and modelling tools for possible sulphur ... -
Leaching of rare earth elements and base metals from spent NiMH batteries using gluconate and its potential bio-oxidation products
(15.07.2021)
article<p>Gluconate is known to mediate metal leaching. However, during bioleaching by e.g., Gluconobacter oxydans, gluconate can be oxidized to 2-ketogluconate and 5-ketogluconate. The impact of bio-oxidation of gluconate ... -
Low residual dissolved phosphate in spent medium bioleaching enables rapid and enhanced solubilization of rare earth elements from end-of-life NiMH batteries
(01 / 2021)
article<p>Successful heterotrophic bioleaching with high metal yields requires an efficient leaching agent production and minimization of secondary reactions such as precipitation of leached metals with growth medium ... -
Potential of biological sulphur recovery from thiosulphate by haloalkaliphilic Thioalkalivibrio denitrificans
(22.10.2021)
articleThe aim of this study was to investigate the potential for elemental sulphur recovery from sulphurous solutions under aerobic and anoxic conditions by haloalkalophilic Thioalkalivibrio denitrificans at 0.8–19.6 g S2O32−-S ... -
Removal of arsenic from acidic liquors using chemical and autotrophic and mixed heterotrophic bacteria-produced biogenic schwertmannites
(27.08.2023)
article<p>Arsenic penetrates human society through a variety of geological and anthropogenic processes, posing significant health hazards. Acid mine drainage, which contains high concentrations of heavy metals and sulfate, ... -
Simulated acid mine drainage treatment in iron oxidizing ceramic membrane bioreactor with subsequent co-precipitation of iron and arsenic
(2021)
article<p>Acid mine drainage (AMD), generated in the active and abandoned mine sites, is characterized by low pH and high metal concentrations. One AMD treatment possibility is biologically oxidizing Fe<sup>2+</sup> ... -
Storing of exoelectrogenic anolyte for efficient microbial fuel cell recovery
(2018)
articleStarting up a microbial fuel cell (MFC) requires often a long-term culture enrichment period, which is a challenge after process upsets. The purpose of this study was to develop low cost storage for microbial fuel cell ...
