1. Department of Environmental Engineering, Technical University of Denmark, Building 115, DK 2800 Lyngby, Denmark
2. Department of Civil and Environmental Engineering, Marquette University, 1515 W. Wisconsin Avenue, Milawaukee, WI 53233, USA
3. K-Konsult, Water Projects, Stockholm S11780, Sweden
4. I. Krüger AS, Gladsaxevej 363, DK 2860 Soborg, Denmark
5. Water Quality Institute, Sciencepark, Gustav Wiedsvej 11, DK 8000, Denmark
6. Institute of Sanitary Engineering, Technical University of Aachen, Mies von der Rohe strasse 1, DK-5100, Aachen, Germany