1. Department of Technology, University College Copenhagen, Sigurdsgade 26, 2200 Copenhagen, Denmark
2. Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
3. Department of Environmental Science, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark
4. Greater Copenhagen Utility HOFOR, Ørestads Boulevard 35, 2300 Copenhagen, Denmark