以两种酚类有机物为基质的微生物燃料电池产电特性

以城市污水处理厂的厌氧污泥为接种微生物,在外电阻为1900Ω下,采用双室微生物燃料电池(MFC)分别对以难降解的有毒有机物2,4-二氯苯酚(DCP),对硝基苯酚(PNP),对硝基苯酚和2,4-二氯苯酚为基质时进行有机物降解和产电性能的研究。实验结果表明以DCP(50 mg/L)为单一基质时,MFC的运行周期长达225 h左右,负载两端的最大电压值达393.7 mV,库仑效率为13.73%;而以PNP和DCP为混合基质时,PNP明显促进DCP的降解,使得DCP的去除率高达64.52%,同时PNP的去除率也达到94.47%。实验最终表明,MFC能够以2,4-二氯苯酚和对硝基苯酚为基质,在实现DCP和PNP降解的同时可稳定高效地向外输出电能。

Power generation using two kinds of phenolic compounds as substrates in MFC

The power generation and phenolic compounds degradation were studied in a two-chambered microbial fuel cell(MFC).The two kinds of phenolic compounds 2,4-dichlorophenol(DCP),p-nitrophenol(PNP),DCP-PNP) were used as the substrates in the MFC that was inoculated with anaerobic sludge of municipal sewage plant,when connected 1 900 Ω external resistor.The results showed that the electric cycle was about 225 h,the maximal voltage output obtained was 393.7 mV and the coulombic efficiency(CE) was 13.73% when DCP(50 mg/L) was used as the sole substrate;the degradation efficiency of DCP increased to 64.52%,accordingly,the degradation efficiency of PNP was 94.47% when DCP-PNP was used as the co-substrate.It was indicated that DCP and PNP can be used as the substrates in the MFC for generating power and biodegraded effectively.