The operating pH in the anodic chamber affects the efficiency
of wastewater treatment and power generation in microbial fuel
cell (MFC). Highest current was reported between pH of 7 and 8.The current values were lower at pH of 9 and pH below 7 (He et al.,
2008). Ren et al. (2007) reported that significant decrease in power
production occurred when the pH in anode compartment dropped
to 5.2 due to the acidic products of fermentation, and power production
was quickly resumed when the pH of anolyte was increased
to 7.0. Most MFCs are operated at neutral pH in order to optimize
bacterial growth conditions. Pertaining to aquaculture, the pH of
water between 6.7 and 9.0 is suitable for fish survival and growth
(Santhosh and Singh, 2007).