Wastewater remediation using microbial fuel cells (MFC) is an advanced method to produce energy and reduce environmental pollution, yet actual energy yields are low and mineral matter is hardly removed. Here we constructed a dual-membrane cylinder photo-microbial fuel cell (DCP-MFC), equipped with cation and anion exchange membranes, to produce electricity and microalgae, and to remove both organics and minerals. Results show that this cell displayed higher electric generation capacity, of 671.6 mV and 0.39 W/m², during 1000 h of stable running, than the control cell, of 601.2 mV and 0.31 W/m². Microalgal biomass increased from 2.90 to 3.80 g/L owing to dissolved oxygen scavenging. Nitrogen recovery increased from 0 to 92.6%. Energy yield increased from 2.33 kJ for the control MFC to 118.28 kJ for microalgal cultivation, and to 155.21 kJ for the DCP-MFC. Microbial community analysis revealed that nitrate was mostly converted into nitrite by denitrifying bacteria in the anode chamber, then used by microalgae in the cathode chamber of the DCP-MFC.

使用微生物燃料电池（MFC）进行废水修复是一种产生能量并减少环境污染的先进方法，但实际的能源产量很低，几乎无法去除矿物质。在这里，我们构造了一个装有阳离子和阴离子交换膜的双膜圆柱光微生物燃料电池（DCP-MFC），以产生电和微藻类，并去除有机物和矿物质。结果显示，在稳定运行1000小时后，该电池的发电容量为671.6 mV和0.39 W / m ²，比对照电池更高，为601.2 mV和0.31 W / m ²。由于溶解氧的清除，微藻生物量从2.90 g / L增加到3.80 g / L。氮回收率从0增加到92.6％。能量产量从对照MFC的2.33 kJ增加到微藻培养的118.28 kJ，DCP-MFC的能量产量从155.21 kJ增加。微生物群落分析表明，硝酸盐主要通过阳极室中细菌的反硝化作用而转化为亚硝酸盐，然后由DCP-MFC阴极室中的微藻使用。