碱处理污泥为底物的微生物燃料电池产电特性

Electricity Generation by Microbial Fuel Cell Using Excess Sludge with Alkaline Pretreatment as Substrate

利用剩余污泥作为接种体,在不添加任何营养元素的情况下,成功启动了两室型微生物燃料电池(MFC)。对剩余污泥进行碱解预处理,考察将其作为MFC底物的可行性,同时分析了剩余污泥经不同时间的碱处理,MFC产电性能的变化及其对污泥的降解效果。结果表明:利用碱预处理污泥作为底物时,MFC的稳定输出电压、最大产电功率密度和对TCOD的去除率均提高,同时周期运行时间延长。并且,随着碱处理时间的延长,MFC的稳定输出电压、产电功率密度和对TCOD的去除率均增大。当碱处理时间为24 h时,稳定输出电压达到630 mV(外阻R=500Ω),最大产电功率密度为11.73 W/m3,对TCOD的去除率为25.3%。这与碱处理使得固体有机物被水解有关。

A two-chamber microbial fuel cell （MFC） was successfully started up using excess sludge without adding nutrients as inoculum. The feasibility that excess sludge with alkaline pretreatment would be used as substrate of MFC was investigated. The electricity generation performance and the sludge degradation effect of MFC were analyzed at different alkaline pretreatment periods of excess sludge. The results indicated that the stable output voltage, the maximum power density and the TCOD removal efficiency of MFC improved. At the same time, the length of the MFC cycle was extended. In addition, the stable output voltage, the maximum power density and the TCOD removal efficiency of MFC were increased by extending the alkaline pretreatment time. When the alkaline pretreatment time of ex- cess sludge was 24 h, a stable output voltage of 630 mV and a maximum power density of 11.73 W/m^3 were obtained at external resistance of 500 1Ω. Meanwhile, the TCOD removal rate was 25.3%, which was relevant to the hydrolysis of solid organic matters.