1. Department of Environmental Engineering College of Biology and the Environment Nanjing Forestry University 159 Longpan Road Nanjing Jiangsu Province 210037 China
2. The Residues and Resource Reclamation Centre Nanyang Environment and Water Resource Institute Nanyang Technological University 1 Cleantech Loop, CleanTechOne, #06‐08 Singapore 637141 Singapore
3. School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Avenue Singapore 637459 Singapore