Objective The aim is to investigate the effect of electrogenic microorganisms on the electricity generation and perforinnances of sediment microbial fuel cell(SMFC)battery system using oily sludge as anode sludge by changing the types and distribution patterns of electricity-producing microorganisms.Methods The output voltage,power density and apparent internal resistance were collected.The oil removal rate was measured,and the electricity generation and degradation properties of SMFC and SMFC were compared,and the effects of different strains on the properties of SMFC were investigated.Results In the single bacteria SMFC,Citrobacter Frei SMFC had better electricity generation and degradation performances than the other five single bacteria SMFC.The electricity generation and degradation performance of mixed bacteria-SMFC were significantly improved comparing with that of single bacteria-SMFC,and Bacillus cereus+Bacillus palpis intermediate-SMFC had the best electricity generation and degradation performance,and the output voltage could reach 515.30 mV.The distribution of the bacteria around the anode material and in the anode bottom mud could degrade the organic matter in the oily sludge,but the distribution of the bacteria in the anode material is more conducive to the performance of SMFC's electricity generation and degradation.Conclusion Mixed bacteria could significantly improve the electricity generation and degradation performance of SMFC when comparing with single bacteria,and the distribution of bacteria on the anode material is more beneficial to the electricity generation and degradation performance of SMFC.
sediment microbial fuel cell(SMFC)oily sludgeelectrogenic microorganismsingle bacteriamixed bacteriastrain distribution
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