1. Department of Agrotechnology and Food Sciences, Sub-department of Environmental Technology, Wageningen University, P.O. Box 8129, 6700 EV, Wageningen, The Netherlands
2. Lettinga Associates Foundation (LeAF), P.O. Box 500 6700 AM Wageningen, The Netherlands
3. Wetsus, Centre for sustainable water technology, P.O. Box 1113 8900 CC Leeuwarden, The Netherlands
4. WERSC, P.O. Box 1300, Amman, Jordan
5. Landustrie Sneek BV, P.O. Box 199, 8600 AD Sneek, The Netherlands