Bioelectricity generation in continuously-fed microbial fuel cell: Effects of anode electrode material and hydraulic retention time

The main aim of this study is to investigate the bioelectricity production in continuously-fed dual chambered microbial fuel cell (MFC). Initially, MFC was operated with different anode electrode material at constant hydraulic retention time (HRT) of 2 d to evaluate the effect of electrode material on electricity production. Pt electrode yielded about 642 mW/m2 power density, which was 4 times higher than that of the MFC with the mixed metal oxide titanium (Ti-TiO2). Further, MFC equipped with Pt electrode was operated at varying HRT (2-0.5 d). The power density generation increased with decreasing HRT, corresponding to 1313 mW/m2 which was maximum value obtained during this study. Additionally, decreasing HRT from 2 to 0.5 d resulted in increasing effluent dissolved organic carbon (DOC) concentration from 1.92 g/L to 2.23 g/L, corresponding to DOC removal efficiencies of 46% and 38%, respectively.