以吲哚为燃料的微生物燃料电池降解和产电特性

以铁氰化钾为电子受体,在两极阴阳室内使用碳毛刷纤维为电极材料构建了循环式微生物燃料电池(MFC),研究了以吲哚为单一燃料和吲哚+葡萄糖为混合燃料条件下MFC的产电特性以及对吲哚和COD的去除效果.结果表明,以1000mg/L葡萄糖+250mg/L吲哚为混合燃料时,MFC的最高电压和最大功率密度分别为660mV和51.2W/m3(阳极),MFC运行10h对吲哚和COD的去除率分别为100%和89.5%;分别以250,500mg/L吲哚为单一燃料时,MFC的平均最高电压分别为115,118mV,最大功率密度分别为2.1,2.3W/m3(阳极).在MFC中,250,500mg/L吲哚被完全降解的时间分别为6,30h.MFC能够利用吲哚为燃料,在实现高效降解吲哚的同时对外产生电能,可用于处理含有毒且难降解有机物的焦化工业废水.

Electricity generation from indole degradation using the microbial fuel cell

A sequential microbial fuel cell (MFC) was constructed to investigate indole degradation and simultaneous electricity generation using indole and a mixture of indole + glucose as the fuel. When 250mg/L indole and 500mg/L indole were used as the fuels in the MFC, the maximum voltage outputs were 115,118mV, respectively, and the corresponding average removal efficiencies of indole were 100% and 62%. Moreover, 250mg /L and 500mg/L indole were removed completely in the MFC within 6, 30h. When a mixture of 1000 mg/L glucose + 250mg/L indole was used as the fuel, the maximum power density was 51.2W/m3 in the MFC. Within 10 h, the averaged removal rates of indole and COD in the MFC were 100% and 89.5%, respectively. The MFC could enhance biodegradation of recalcitrant contaminants such as indole in practical applications of wastewater treatment.