以双室型微生物燃料电池为试验装置,比较铁氰化钾、重铬酸钾、高锰酸钾作为阴极电子受体时微生物燃料电池的电压和功率输出.结果表明,高锰酸钾与重铬酸钾混合电子受体对微生物燃料电池性能的提高没有显著效果,不如两者的单独表现；高锰酸钾对应的最高输出电压可达1 160 mV,但很不稳定,会很快下降到600 mV左右,在实际应用中有一定障碍；在酸性条件(pH=3.0)下,重铬酸钾的开路电压为1 081.2 mV,最大输出功率密度为35.1 W/m3,电池内阻为170.27 Ω,而且表现稳定,是理想的阴极电子受体.%A dual-chamber microbial fuel cell (MFC) was used as experimental facility, the comparison of external voltage and power output with ferricyanide, potassium dichromate and potassium permanganate as cathode electron acceptor was conducted. The results showed that the performance of MFC with the mixed electron receivers (potassium dichromate : potassium permanganate =1:1) was not better than the two separate ones. The external voltage of MFC with potassium permanganate could reach 1 160 mV, but not stable and quickly dropped to 600 mV in the end of incubation, it had difficulties in practice. At the acid condition (pH 3.0), the open circuit potential, (OCP) of the MFC with potassium dichromate could reach 1 081.2 mV, the maximum power density could reach to 35.1 W/m3, and the internal resistance was 170.27 D,. Due to its high and stable power output, potassium dichromate is an ideal cathode electron acceptor, which promised that the MFC has a good renewable energy application prospect.
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