1. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore
2. Residues and Resource Reclamation Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore
3. Interdisciplinary Graduate Program, Nanyang Technological University, 61 Nanyang Drive, Singapore 637335, Singapore