1. Process and Systems Engineering Center (PROSYS), Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
2. Biofos A/S, Refshalevej 250, 1432 Copenhagen, Denmark
3. Unisense Environment A/S, Tueager 1, DK-8200 Aarhus N, Denmark