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Water Science & Technology—WST Vol 57 No 4 pp 575–579 © IWA Publishing 2008 doi:10.2166/wst.2008.084 Combining biocatalyzed electrolysis with anaerobic digestionP. Clauwaert, R. Tolêdo, D. van der Ha, R. Crab, W. Verstraete, H. Hu, K. M. Udert and K. RabaeyLaboratory of Microbial Ecology and Technology (LabMET), Ghent University, Coupure L 653, B-9000, Ghent, willy.verstraete@ugent.beSchool of Chemical, Environmental and Mining Engineering, University of Nottingham, University Park, NG7 2RD, Nottingham, UK Swiss Federal Institute for Environmental Science and Technology (EAWAG), P.O. Box 611, 8600, Dübendorf, Switzerland Advanced Wastewater Management Centre, University of Queensland, Brisbane, QLD 4072, Australia ABSTRACT Biocatalyzed electrolysis is a microbial fuel cell based technology for the generation of hydrogen gas and other reduced products out of electron donors. Examples of electron donors are acetate and wastewater. An external power supply can support the process and therefore circumvent thermodynamical constraints that normally render the generation of compounds such as hydrogen unlikely. We have investigated the possibility of biocatalyzed electrolysis for the generation of methane. The cathodically produced hydrogen could be converted into methane at a ratio of 0.41 mole methane mole-1 acetate, at temperatures of 22±2°C. The anodic oxidation of acetate was not hampered by ammonium concentrations up to 5 g N L-1.An overview is given of potential applications for biocatalyzed electrolysis. Keywords: ammonium toxicity; BEAMR; biological cathode; hydrogen; manure; methane; MFC; urine eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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