不同接种条件下微生物燃料电池产电特性分析

Power-generation performance of microbial fuel cells with different inoculations

比较了11种不同来源的接种物对微生物燃料电池产电性能的影响,并考察了接种污泥的TCOD和pH值等特性对电池产电情况的影响.结果表明,以华南农业大学资源环境学院新肥室沼气池污泥为接种物的燃料电池产电效果最好,产生的最大电压为0.53V(外电阻为500Ω),最大功率密度达到9.12W/m3.污泥的初始TCOD越高,所产生的电能越多;而pH值在5.6～7.8范围内时,对MFC产电能力的影响不大.通过扫描电镜对阳极表面微生物的观察发现,不同接种物电池阳极富集的微生物存在很大差异,这可能是影响微生物燃料电池产电性能的最主要因素之一.

Power-generation performance of microbial fuel cells（MFC） with two chambers was studied under the condition that 11 inoculum from the different origins,and the effects of inoculum parameters such as sludge concentration and pH were also investigated.The power-generation performance of MFC was best comparing with other inoculums by using biogas digester sludge as inoculum from new fertilizer laboratory in Natural Resources and Environment College,South China Agricultural University.The voltage over external resistance was 0.53V and the maximum power density was 9.12W/m3（external resistance 500 Ω）.And the higher the total COD（TCOD） of sludge was,the more power output of MFC was.PH value had no obvious effects on MFC performance in the range of pH value 5.6～7.8.It could be observed according to bacterial growths on the surface of the anodes by scanning electron microscopy that there were huge differences of microbial communities＇ enrichment on the surface of anode.That is maybe the one of the key effective parameters of the power-generation of MFC.