Abstract
In this study, a microbial fuel cell (MFC) was developed to treat waste, produce electricity and to grow microalgae simultaneously. Dead microalgae biomass (a potential pollution vector in streams) was used as a substrate at anode. CO2 generated at anode was used to grow freshwater microalgae at cathode. The performance of microalgae-fed MFC was compared with acetate-fed MFC. The maximum power density of 1926±21.4mW/m2 (8.67±0.10W/m3, at Rext=100Ω) and Coulombic efficiency (CE) of 6.3±0.2% were obtained at 2500mg COD/L of microalgae powder (0.5g/L). Microalgae captured CO2 (5–14%, v/v) to produce a biomass concentration of 1247±52mg/L. However, microalgae could not grow in acetate-fed (0.5g/L) MFC (acetate-control) and without anodic CO2 supplying MFC (CO2-control).
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