School of Ocean Science and Technology,Dalian University of Technology,Panjin 124221,China;
School of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China;
Key Laboratory of Industrial Ecology and Environmental Engineering(Dalian University of Technology),Ministry of Education,School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China;
Fe(0)-cathode; CH_(4)production; Anaerobic digestion; Direct electron transfer; Microbial electrochemical system;