1. Interdisciplinary Graduate School; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
2. Residues & Resource Reclamation Centre, Nanyang Environment and Water Research Institute, CleanTech One; Nanyang Technological University; Singapore 637141 Singapore
3. School of Chemical and Biomedical Engineering; Nanyang Technological University; 62 Nanyang Drive Singapore 637459 Singapore