• 关键词：不锈钢毡  微生物电解池  有机物废弃物  甲烷制备  纯化

• 基金项目：天津市应用基础与前沿技术研究计划（青年项目）（No.14JCQNJC08300）；天津大学自主创新基金（No.2015XRG-0049）；公益性行业（农业）科研专项经费资助课题（No.201303101-01）

• 薄涛
• 天津大学环境科学与工程学院, 天津 300350

• 翟洪艳
• 天津大学环境科学与工程学院, 天津 300350

• 季民
• 天津大学环境科学与工程学院, 天津 300350

• 摘要：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（1.0 V）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） L_Met·d^-1·L_R^-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.

• Abstract：To achieve energy recycle from organic waste, a microbial electrolysis cell (MEC) with a stainless steel felt electrode was applied to treat acetate-containing artificial wastewater. The effects of external voltages on the acetate removal, CH₄ gas production, microbial consortium and activity were studied. The acetate removal rate reached a maximum of (167.30±0.71) mg·L^-1·h^-1 in the MEC with an external voltage of 0.4 V, whereas the highest CH₄ percentage (96.98%±1.19%), CH₄ production rate ((1.18±0.04) L_Met·d^-1·L_R^-1) and acetate removal efficiency (100%±0.05%) occurred in the MEC with an external voltage of 1.0 V. Additionally, the external voltage could enhance the microbial activity and the relative abundance of hydrogenotrophic methanogens on the cathode. In the MEC with an external voltage of 1.0 V, the abundance of hydrogenotrophic methanogens reached the highest value of 78.87%, and Methanospirillum, whose abundance was 68.38%, was the major hydrogenotrophic methanogens. It was demonstrated that the acetate removal rate, methane production rate and methane purity could be improved in MEC by an appropriate external voltage.

• Key words：stainless steel felt  microbial electrolysis cell  waste organic  methane production  purification

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