利用玉米浸泡液产电的微生物燃料电池研究  

Electricity Generation from Corn Steepwater Using Microbial Fuel Cell Technology

作　　者：卢娜[1,2] 周顺桂[2] 张锦涛[1,2] 倪晋仁[1] 

机构地区：[1]北京大学环境工程系,水沙科学教育部重点实验室,北京100871 [2]广东省生态环境与土壤研究所广东省农业环境治理综合实验室,广州510650

出　　处：《环境科学》2009年第2期563-567,共5页Environmental Science

基　　金：国家自然科学基金项目(20777013);广东省自然科学基金项目(07006759)

摘　　要：以玉米淀粉生产过程中的浸泡液(玉米浸泡液)作为接种液和基质,利用"三合一"膜电极的单室空气阴极微生物燃料电池进行试验,采用在线监测电压和废水分析方法对产电功率和化学需氧量(COD)、氨氮进行测定,探讨高COD、高氨氮有机废水产电及废水处理的可行性.结果表明,经过94d(1个周期)的连续运行(固定外电阻为1000Ω),17d时输出电压达到最大(525.0mV),稳定期最大输出功率可达169.6mW/m2,此时电池相应的电流密度为440.2mA/m2,内阻约为350Ω,开路电压619.5mV;但燃料电池电子利用效率较低(库仑效率为1.6%);1个周期结束时浸泡液的COD去除率达到51.6%,氨氮去除率25.8%.本试验利用玉米浸泡液成功获得电能,同时对浸泡液有效地进行了处理,为其资源化利用提供新途径.Corn steepwater containing 49 732.2 mg/L of chemical oxygen demand （COD） was used as fuel for a membrane electrode assembly microbial fuel cell （MEA-MFC）, which could generate electricity and treat the wastewater at the same time. During a batch experiment of 94 days with a fixed 1 000 Ω external resistance, the maximum voltage output of 525.0 mV and power density of 169.6 mW/m^2 were obtained after 17 days,corresponding to the current density, internal resistance and open voltage of 440.2 mA/m^2, 350 Ω and 619.5 mV, respectively. However, data showed that the coulombic efficiency was only 1.6%, suggesting very limited COD was utilized for electricity generation. At the conclusion of the test, the removals of COD and ammonia-nitrogen were achieved 51.6 % and 25.8 %, respectively. This study demonstrates that corn steepwater can be used for power generation in MFC with simultaneous accomplishments of wastewater treatment, providing a novel approach for the safe disposal and recycle of corn steepwater.

关 键 词：微生物燃料电池 玉米浸泡液 “三合一”膜电极 产电 

分 类 号：X382[环境科学与工程—环境工程]