Zhen Guangyin, is currently JSPS research fellow at the National Institute for Environmental Studies (NIES), Japan. He received his BEng Degree in Environmental Engineering from Hunan University, China in 2008 and his Ph.D. from Tongji University, China in 2014. Prior to joining in the NIES, he worked as a visiting researcher at the Tohoku University, Japan. He has authored or co-authored 26 peer-reviewed international papers, 5 Chinese papers and 4 invited book chapters. His principal research interests lie in sewage sludge treatment and renewable energy conversion (anaerobic digestion, microbial electrolysis cell, etc.).