1. Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
2. Process and Systems Engineering Center (PROSYS), Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs Lyngby, Denmark
3. Singapore Centre for Environmental Life Sciences Engineering, National University of Singapore, Singapore 119077, Singapore
4. Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, New South Wales 2007, Australia
5. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore