Enhanced methane production in an anaerobic digestion and microbial electrolysis cell coupled system with co-cultivation of Geobacter and Methanosarcina

作     者：Qi Yin Xiaoyu Zhu Guoqiang Zhan Tao Bo Yanfei Yang Yong Tao Xiaohong He Daping Li Zhiying Yan 

作者机构：Key Laboratory of Environmental and Applied Microbiology Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041 China Environmental Microbiology Key Laboratory of Sichuan Province Chengdu 610041 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2016年第28卷第4期

页      面：210-214页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080702[工学-热能工程] 0808[工学-电气工程] 08[工学] 0807[工学-动力工程及工程热物理] 09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by the National Natural Science Foundation of China(Nos.31270166,31300116 and 51408580) the Chinese Academy of Sciences foundation(Nos.Y4C5011100 and KLCAS-2013-03) 

主　　题：AD–MEC coupled system Geobacter Methanosarcina Co cultivation Methane production 

摘      要：The anaerobic digestion（AD）and microbial electrolysis cell（MEC）coupled system has been proved to be a promising process for biomethane *** this paper,it was found that by co-cultivating Geobacter with Methanosarcina in an AD–MEC coupled system,methane yield was further increased by 24.1%,achieving to 360.2 m L/g-COD,which was comparable to the theoretical methane yield of an anaerobic *** the presence of Geobacter,the maximum chemical oxygen demand（COD）removal rate（216.8 mg COD/（L·hr））and current density（304.3 A/m3）were both increased by 1.3 and 1.8 fold compared to the previous study without Geobacter,resulting in overall energy efficiency reaching up to 74.6%.Community analysis demonstrated that Geobacter and Methanosarcina could coexist together in the biofilm,and the electrochemical activities of both were confirmed by cyclic *** study observed that the carbon dioxide content in total gas generated from the AD reactor with Geobacter was only half of that generated from the same reactor without Geobacter,suggesting that Methanosarcina may obtain the electron transferred from Geobacter for the reduction of carbon dioxide to *** together,Geobacter not only can improve the performance of the MEC system,but also can enhance methane production.