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Electricity Production in Microbial Fuel Cell Subjected to Different Operational Modes
Pages: 483-490
Year: Issue:  5
Journal: Acta Metallurgica Sinica

Keyword:  Microbial fuel cellsInoculum speciesCathodic electron acceptorsElectricity production;
Abstract: The effects of inoculum species, substrate concentration, temperature, and cathodic electron acceptors on electricity production of microbial fuel cells(MFCs) were investigated in terms of start-up time and power output. When inoculated with aeration tank sludge, this MFC outperformed the cell that was inoculated with anaerobic sludge in terms of start-up time and power output. After running for a certain time period, the dominant populations of the two MFCs varied significantly. Within the tested range of substrate concentration(200–1800 mg L-1), the voltage output increased and the time span of the electricity generation lengthened with increasing substrate concentration. As the temperature declined from 35 to 10 °C, the maximum power density reduced from 2.229 to 1.620 W m-3, and anodic polarization resistance correspondingly dropped from 118 to 98 X. The voltage output of MFC–Cu2+was 0.447 V, which is slightly lower than that achieved with MFC–[Fe(CN)6]3-(0.492 V), thereby indicating that MFCs could be used to treat wastewater containing Cu2+pollutant in the cathode chamber with removal of organics in anode chamber and simultaneous electricity generation.
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