| 利用玉米浸泡液产电的微生物燃料电池研究 |
| 摘要点击 2969 全文点击 1563 投稿时间：2008-04-02 修订日期：2008-05-20 |
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| 中文关键词 微生物燃料电池 玉米浸泡液 “三合一”膜电极 产电 |
| 英文关键词 microbial fuel cell(MFC) corn steepwater assembly membrane electrode power generation |
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| 中文摘要 |
| 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94 d（1个周期）的连续运行（固定外电阻为1 000 Ω），17 d时输出电压达到最大（525.0 mV），稳定期最大输出功率可达169.6 mW/m2，此时电池相应的电流密度为440.2 mA/m2，内阻约为350 Ω，开路电压619.5 mV；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. |
| 英文摘要 |
| 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/m2 were obtained after 17 days，corresponding to the current density，internal resistance and open voltage of 440.2 mA/m2， 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. |
