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电极面积对无质子交换膜微生物燃料电池协同去污能力的影响

Keywords: 微生物燃料电池,单室型,电极面积,厌氧消化,脱氮

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Abstract:

以间距是180μm的不锈钢网为电极,构建了单室型无质子交换膜微生物燃料电池(MFC)污水处理系统。分别驯化、培养厌氧消化菌和反硝化菌,厌氧消化菌在阳极附着成膜组成生物阳极氧化去除有机污染物,反硝化菌在阴极附着成膜组成生物阴极反硝化去除含氮污染物,研究了电极面积对污染物协同去除能力的影响。当电极面积为45mm×100mm和45mm×50mm时,两系统的开路电压最大值分别为(182.8±6.2)mV和(161.8±5.4)mV,COD、NH4+-N和NO3--N最大去除率分别为96.5%、99.7%、99.7%和85.4%、92.2%、97.9%;出水中NO2--N的含量分别低于(0.072±0.006)mg/L和(0.084±0.008)mg/L。这表明电极面积大的系统具有较好的有机污染物和含氮污染物协同去除能力。

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