1. Experimental and theoretical characterization of microbial bioanodes formed in pulp and paper mill effluent in electrochemically controlled conditions
- Author
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Alain Bergel, Eric Fourest, Stephanie F. Ketep, Centre National de la Recherche Scientifique - CNRS (FRANCE), Centre Technique du Papier - CTP (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Laboratoire de Génie Chimique - LGC (Toulouse, France), Centre Technique du Papier (CTP), Laboratoire de génie chimique [ancien site de Basso-Cambo] (LGC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
- Subjects
Paper ,Environmental Engineering ,Microbial fuel cell ,Time Factors ,Hydraulic retention time ,020209 energy ,Analytical chemistry ,Industrial Waste ,Bioengineering ,02 engineering and technology ,010501 environmental sciences ,Electrochemistry ,01 natural sciences ,Michaelis–Menten kinetics ,Waste Disposal, Fluid ,[CHIM.GENI]Chemical Sciences/Chemical engineering ,Electricity ,0202 electrical engineering, electronic engineering, information engineering ,Génie chimique ,Waste Management and Disposal ,Voltammetry ,Effluent ,Electrodes ,0105 earth and related environmental sciences ,Biological Oxygen Demand Analysis ,Bacteria ,Renewable Energy, Sustainability and the Environment ,Chemistry ,business.industry ,Bioanode ,Environmental engineering ,Reproducibility of Results ,Paper mill ,General Medicine ,Electrochemical Techniques ,Models, Theoretical ,Microbial anode ,Pulp mill effluent ,business ,Energy source - Abstract
International audience; Microbial bioanodes were formed in pulp and paper effluent on graphite plate electrodes under constant polarization at -0.3 V/SCE, without any addition of nutriment or substrate. The bioanodes were characterized in 3-electrode set-ups, in continuous mode, with hydraulic retention times from 6 to 48 h and inlet COD from 500 to 5200 mg/L. Current densities around 4 A/m2 were obtained and voltammetry curves indicated that 6 A/m2 could be reached at +0.1 V/SCE. A theoretical model was designed, which allowed the effects of HRT and COD to be distinguished in the complex experimental data obtained with concomitant variations of the two parameters. COD removal due to the electrochemical process was proportional to the hydraulic retention time and obeyed a Michaelis-Menten law with respect to the COD of the outlet flow, with a Michaelis constant KCOD of 400 mg/L. An inhibition effect occurred above inlet COD of around 3000 mg/L.
- Published
- 2013
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