单室无膜微生物电解池处理厨余垃圾的效能

Running performance of single-chamber membrane-free microbial electrolysis cell using food waste as substrate

为实现固体污染物的高效处理与能量回收,以厨余垃圾为底物,构建单室无膜微生物电解池(MEC),考察不同外加电压对系统处理厨余垃圾效能的影响。结果表明,在外加电压0~1.4V范围内,MEC系统累积甲烷产率和TS去除率随电压的升高而升高,最大值分别为271±23mL/g和44.3%±2.6%,较传统厌氧消化(即0V电压组)分别提高了66.3%和43.8%。更高的外加电压(2.0V)则对厌氧微生物代谢活性产生抑制作用,导致系统运行性能大幅度下降。在适合的外加电压范围内,MEC能够有效提高对厨余垃圾的处理效果。

This paper seeks to achieve the high-efficient treatment and energy recovery of high-solid pollutants.The study is focused on investigating the influence of different applied voltages on operation performance by constructing the single-chamber membrane-free microbial electrolysis cell(MEC)using food waste as substrate.The results indicate that with applied voltage range from 0 to 1.4 V,MEC system sees the cumulative methane yield and TS removal rate increasing with the increase of applied voltage,showing the maximum values of 271±23 mL/g and 44.3±2.6%respectively,a 66.3%and 43.8%increase over traditional anaerobic digestion(i.e.0 V voltage group).However,higher applied voltage of 2.0 V could inhibit the activities of anaerobic microorganisms,with a consequent significant decrease in system running performance.The desirable applied voltages could give MEC an effective improvement in the treatment efficiency of food waste.