高锰酸钾用于生物燃料电池阴极电子受体

为提高生物燃料电池(MFC)的输出功率和有机物的降解效率,实验以KMnO4为阴极电子受体,泡沫金属为阳极.葡萄糖模拟废水为基质,设计了新型双室生物燃料电池,考察了KMnO4浓度、pH值对MFC产电性能的影响.结果表明,KMnO4浓度为500 mg/L时,MFC的最大开路电压可达1.68 V,最大输出比功率为8 657 mW/m3,电池的内阻为232 Ω.同时化学需氧量(COD)去除率为87.1%,库仑效率为45.2%.阴极液的pH值对电池的产电性能有显著影响,酸性溶液条件下有利于改善电池的性能.本研究设计的MFC可有效地降解有机物回收电能,同时提高了电池的产电能力,具有显著的经济、环境效益和应用前景.

Cathodic electron acceptors of KMnO4 in microbial fuel cell

In order to promote the energy output of microbial fuel cell(MFC)and degradation efficiency of organic matter,a new two-chamber microbial fuel cell was constructed by using permanganate as cathodic electron acceptors,foamed metal as anode and glucose as the anode fed.The influence of permanganate concentration and pH about performance of MFC were researched.The results demonstrate that the maximum open circuit voltage and maximum power density can reach 1.68 V,8 657 mW/m3 of MFC,the internal resistance of the cell is 232 W,when permanganate concentration is 500 mg/L and pH=2.0.Meanwhile,COD removal efficiency and coulombic efficiency are 87.1% and 45.2%.PH of catholyte affects performance of MFC,which is meliorated when the catholyte is acidity.MFC are capable degradation of organic matter with recovery of energy,at the same time,performance of MFC was improved simultaneously,which possibly captured considerable benefits in terms of environments and economics,the application prospect is comprehensive.