The Effect of Suspended Sludge on Electricity Generation in Microbial Fuel Cells
Analyzing effect of suspended sludge on power production is important to better understand how to improve microbial fuel cells (MFCs). In this paper, a comparison of two parallel single-chambered MFCs with or without suspended sludge operated in fed-batch mode was investigated to study the effect of suspended sludge on electricity generation. For the power generation from the glucose wastewater, both MFCs generated the steady voltage of 0.45～0.50V. However compared to the MFC without suspended sludge, Coulombic efficiency of the MFC with suspended sludge was slight lower (2.3％-2.5％) than that without suspended sludge (2.9-3.1％) and the duration of stationary phase in each cycle with suspended sludge was 13.7～29.8％ shorter than that of without suspended sludge. These results show that no obvious positive effect of suspended sludge on power generation was observed for MFC using glucose wastewater. When feces sewage was used, unlike the steady voltage (0.43-0.47V) and Coulombic efficiency (3.5～3.9％) from MFC with suspended sludge, the working voltage (0.45-0.65V) and Coulombic efficiency (1.5～4.3％) from the system without suspended sludge was fluctuant, therefore suspended sludge is necessary to obtain steady power output from more recalcitrant complex compounds.
suspended sludge microbial fuel cells electricity generation glucose wastewater feces sewage
Yinfang Zhi Hong Liu Lu Yao
Bioengineering Department Beijing University of Aeronautics and Astronautics Beijing, China Department of Environmental Engineering Beijing University of Aeronautics and Astronautics Beijing,
国际会议
上海
英文
3545-3549
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）