Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7080113 | Bioresource Technology | 2013 | 9 Pages |
Abstract
Microbial bioanodes were formed in pulp and paper effluent on graphite plate electrodes under constant polarization at â0.3Â 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 48Â h and inlet COD from 500 to 5200Â mg/L. Current densities around 4Â A/m2 were obtained and voltammetry curves indicated that 6Â A/m2 could be reached at +0.1Â 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 400Â mg/L. An inhibition effect occurred above inlet COD of around 3000Â mg/L.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Stephanie F. Ketep, Eric Fourest, Alain Bergel,