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Abstract
A 90-liter stackable pilot microbial fuel cell was designed and proved to be capable for brewery wastewater treatment and simultaneous electricity harvested. The system was stacked by 5 easily-stackable modules, and operated in an energy self-sufficient manner for more than 6months. Tests were conducted under two different influent strengths (diluted wastewater, stage 1; raw wastewater, stage 2). The COD, SS removal efficiencies were 84.7% and 81.7% at stage 1, 87.6% and 86.3% at stage 2. The system produced enough energy (0.056kWh/m3 at stage 1, 0.097kWh/m3 at stage 2) to power the pumping system (0.027kWh/m3 at both stages), net electrical energy of 0.021kWh/m3 and 0.034kWh/m3 were harvested. These results show that this pilot-scale system could be used to effectively treat real wastewater with zero energy input.
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