1. Department of Environmental and Resource Engineering, Technical University of Denmark, Bygningstorvet, Building 115, 2800 Kgs. Lyngby, Denmark
2. Department of Water and Biotechnology, Danish Technological Institute, Kongsvang Alle 29, DK-8000 Aarhus C, Denmark
3. Alumichem (Norlex Systems A/S), Bistrupvej 172, 3460 Birkerød, Denmark
4. SK Forsyning, Nordvej 7, 4200 Slagelse, Denmark