以吡啶和葡萄糖为燃料的MFC产电特性研究

Power Generation from Pyridine and Glucose Using Microbial Fuel Cell

不同类型的有机物对MFC的产电性能有不同的影响,通过构建填料型MFC,以吡啶和葡萄糖为混合燃料,以铁氰化钾为电子受体,对有机物在MFC中的降解以及产电性进行研究.结果表明,外阻为1 000Ω的条件下,MFC的最大输出电压随着葡萄糖浓度的降低而降低,当吡啶初始浓度为500 mg/L,葡萄糖浓度分别为500、250、100 mg/L时,运行周期逐渐缩短,分别为49.5、25.7、25.2 h;最大体积功率密度为48.5、36.2、15.2 W/m3,最高电压为623 mV.MFC可实现对吡啶的高效降解,24h内吡啶去除率高达95%,但葡萄糖的浓度对吡啶的降解速率影响不大;高浓度吡啶存在的条件下对MFC利用葡萄糖产电的性能影响不大.利用500 mg/L单一吡啶作为MFC的燃料时,无明显产电现象.MFC利用吡啶和葡萄糖作为混合燃料时,可以在实现吡啶降解的同时稳定地向外输出电能.

Different organics have different effects on the power generation of microbial fuel cell.A packing-type MFC was constructed to investigate organic matter degradation and power generation.Experiments were conducted using an initial pyridine concentration of 500mg/L with different glucose concentrations（500,250,and 100mg/L） as the MFC fuel.Results showed that maximum voltages decreased with the decrease of concentration of glucose and the maximum voltage was 623 mV.The cycle time were 49.5,25.7,25.2 h respectively.Correspondingly,the maximal volumetric power densities were 48.5,36.2,15.2W/m^3.Pyridine removal rate reached 95% within 24 h using MFC,which was not affected by concentration of glucose.Power generation using glucose was not affected in the presence of high concentration of pyridine. However,the phenomenon of electricity production was not obvious when using 500mg/L pyridine as sole fuel.The results clearly demonstrated the feasibility of using the MFC to generate electricity when using pyridine and glucose mixture as fuel and simultaneously enhanced pyridine degradation.