1. Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau 999078, China
2. Brook Byers Institute for Sustainable Systems and School of Civil and Environmental Engineering, Georgia Institute of Technology, 828 West Peachtree Street, Atlanta, Georgia 30332, United States
3. Wastewater Treatment Laboratory, FYT Graduate School, The Hong Kong University of Science and Technology, Guangzhou 511458, China