Abstract The dual-chamber microbial fuel cell (MFC) used lactic acid bacteria for the electricity production microorganisms and adopted glucose as the only electron donor. The property and mechanism of electricity production were also investigated on lactic acid bacteria microbial fuel cells. When the concentration of the substrate was 1.5 g/L at 30 ℃, the opencircuit voltage of the MFC kept at 500 mV. Under the experimental conditions, the maximum power density reached 393.23 mW/m2 and the internal resistance was about 500 Ω on the MFC. The change of the metabolites contents in the lactic acid bacteria MFC electricity production process was analyzed by the gas chromatography. The results indicated that both the normal metabolic pathways which was not involved in the production of electricity and the electricity production process, were related to homolactic fermention, the classical pathway of heterolactic fermentation and bifidobacterium fermentation. After adding ethanol in the process of the electricity production for lactic acid bacteria MFC, the results showed that ethanol was not conducive to the electricity production. This indicated that the key metabolic pathway in lactic acid bacteria producing electricity process was heterolactic fermentation.
YANG Jing-Na, SUN Yu-Di, GUAN Yi.Property and Mechanism of Electricity Production on Lactic Acid Bacteria Microbial Fuel Cells[J] Chemcial Industry and Engineering, 2014,V31(5): 43-48
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2014, Vol. 31 
