1. Nanyang Environment and Water Research Institute, Interdisciplinary Graduate School, Nanyang Technological Univ., 50 Nanyang Ave., Singapore 639798; Nanyang Environment and Water Research Institute, Nanyang Technological Univ., 1 Cleantech Loop, Cleantech One #06-08, Singapore 637141. ORCID:
2. Nanyang Environment and Water Research Institute, Nanyang Technological Univ., 1 Cleantech Loop, Cleantech One #06-08, Singapore 637141.
3. Environmental Bio-Innovations Group, School of Civil and Environmental Engineering, Nanyang Technological Univ., N1-01a-13, 50 Nanyang Ave., Singapore 639798.
4. Grundfos Holding A/S, Poul Due Jensens Vej 7, DK-8850 Bjerringbro, Denmark.
5. Grundfos (Singapore) Pte. Ltd., 25 Jalan Tukang, Singapore 619264.
6. Professor, Environmental Bio-Innovations Group, School of Civil and Environmental Engineering, Nanyang Technological Univ., N1-01a-13, 50 Nanyang Ave., Singapore 639798; School of Civil and Environmental Engineering, Nanyang Technological Univ., N1-01a-29, 50 Nanyang Ave., Singapore 639798 (corresponding author).