1. School of Environment and Natural Resources, Renmin University of China, Beijing 100872, PR China
2. Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
3. College of Architecture and Environment, Sichuan University, Chengdu 610065, PR China
4. Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, PR China
5. Chair of Urban Water Systems Engineering, Technical University of Munich, Garching 85748, Germany