Department of Chemistry, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy.
Bioresour Technol. 2013 Feb;130:366-71. doi: 10.1016/j.biortech.2012.11.080. Epub 2012 Nov 28.
The anode of a two-chamber methane-producing microbial electrolysis cell (MEC) was poised at +0.200V vs. the standard hydrogen electrode (SHE) and continuously fed (1.08gCOD/Ld) with acetate in anaerobic mineral medium. A gas mixture (carbon dioxide 30vol.% in N(2)) was continuously added to the cathode for both pH control and carbonate supply. At the anode, 94% of the influent acetate was removed, mostly through anaerobic oxidation (91% coulombic efficiency); the resulting electric current was mainly recovered as methane (79% cathode capture efficiency). Low biomass growth was observed at the anode and ammonium was transferred through the cationic membrane and concentrated at the cathode. These findings suggest that the MEC can be used for the treatment of low-strength wastewater, with good energy efficiency and low sludge production.
在两室产甲烷微生物电解池 (MEC) 中，阳极相对于标准氢电极 (SHE) 稳定在 +0.200V，并以厌氧矿物培养基中 1.08gCOD/Ld 的速率连续添加乙酸盐。阴极连续添加混合气体（N2 中的二氧化碳 30vol.%）以进行 pH 控制和碳酸盐供应。在阳极，94%的进水乙酸盐被去除，主要通过厌氧氧化（91%库仑效率）；产生的电流主要作为甲烷回收（79%阴极捕获效率）。在阳极观察到低生物量生长，铵通过阳离子膜传递并在阴极浓缩。这些发现表明，MEC 可用于处理低浓度废水，具有良好的能源效率和低污泥产量。
