1. Water Reclamation (Plants) Department, PUB, Singapore, 40 Scotts Road #15-01, Environment Building, Singapore 228231
2. Changi Water Reclamation Plant, 10 Changi East Close, Singapore 498785
3. Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft 2629 HZ, The Netherlands
4. Department of Civil and Environmental Engineering, University of Michigan, 2350 Hayward Street, Ann Arbor, MI 48109, USA