Bioelectricity Generation and Bioremediation of an Azo-Dye in a Microbial Fuel Cell Coupled Activated Sludge Process.

The coulombic efficiency (CE) of the system was lower as compared to the values reported in literature due to the toxic nature of the azo-dye [ 20 , 25 ].The highest coulombic efficiency of 10.36%was obtained for 200 ppm of ANB( Fig 3B ), which is slightly lower than the value reported by Bakhshian et al.[ 20 ] but much higher than the values reported by Zhang et al.[ 39 ].The toxic effects are quite significant at higher concentrations of ANB (e.g. 400 ppm) resulting in to lower CE value.

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