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双室微生物燃料电池处理硝酸盐废水

Keywords: 双室微生物燃料电池,阴极微生物,产能,硝酸盐

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Abstract:

基于双室微生物燃料电池(microbialfuelcell,MFC),针对阴极分别接种活性污泥(A-MFC)和反硝化细菌(D-MFC),研究其产电情况和硝酸盐废水去除效果。结果表明,在产电的同时都可有效去除废水中的硝酸盐污染物。在外接电阻100Ω的情况下,2种MFC均具有良好的产电性能,A-MFC和D-MFC达到的最大输出电压分别为119.6mV和117.2mV,最大功率密度分别为23.40mW/m2和26.63mW/m2;同时两者在阴极室的平均反硝化速率分别为1.86mg/(L·d)和2.19mg/(L·d),阳极室的平均COD去除率分别为81.9%和82.4%。另外,通过扫描电镜观察可知,A-MFC和D-MFC阴极碳布表面形貌存在差异,并且阳极与阴极碳布表面形貌差异显著。

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