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为实现有机废弃物能源化利用,采用不锈钢毡电极微生物电解池(MEC)处理含乙酸的模拟废水,系统地研究了外加电压对乙酸去除、甲烷(CH4)生成、微生物种群和活性等方面的影响.结果表明,MEC(0.4 V)中乙酸去除速度最快,可以达到(167.30±0.71)mg·L~(-1)·h-1;MEC(1.0V)中CH4浓度、CH4产生速度和乙酸去除率达最大值,分别为96.98%±1.19%、(1.18±0.04)LMet·d-1·LR-1和100%±0.05%.另外,外加电压可提高阴极微生物代谢活性和嗜氢产甲烷菌的相对丰度.外加电压为1.0 V时,嗜氢产甲烷菌相对丰度达78.87%,其中Methanospirillum最为丰富,其含量占到全部微生物的68.38%.研究证明MEC可以实现乙酸的快速去除、甲烷高效制备和甲烷原位纯化.
In order to realize the energy utilization of organic wastes, the simulated wastewater containing acetic acid was treated by stainless steel felt electrode microbial cell (MEC), and the effects of applied voltage on acetic acid removal, methane (CH4) formation, microbial population and activity were studied systematically .The results showed that the removal rate of acetic acid in MEC (0.4 V) was the fastest (167.30 ± 0.71) mg · L -1 · h-1, the concentration of CH 4, CH 4 production rate and acetic acid The maximum removal rates were 96.98% ± 1.19%, (1.18 ± 0.04) LMet · d-1 · LR-1 and 100% ± 0.05% respectively.In addition, the applied voltage could increase the metabolic activity of the cathode microorganism and increase the methane production The relative abundance of bacteria was 1.0 V. The relative abundance of Methanospiril was 78.87% when the applied voltage was 1.0 V, among which Methanospirillum was the most abundant, accounting for 68.38% of all the microorganisms.The results showed that MEC could achieve the rapid removal of acetic acid, Methane is efficiently produced and methane is purified in situ.