1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;
2. Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;
3. Department of Urban Water and Waste Management, University of Duisburg-Essen, Essen, Germany;
4. Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA;
5. Department of Environmental Engineering, College of Engineering, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do, Republic of Korea;
6. Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido, Japan;
7. Biological and Environmental Science & Engineering, Water Desalination and Reuse Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia;
8. Department of Bioenvironmental Engineering, Chung-Yuan Christian University, Chung-Li, Taiwan;
9. School of Biological Sciences, The University of Hong Kong, Hong Kong;
10. Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, Taiwan