1. University of Copenhagen, Faculty of Science, Department of Plant and Environmental Sciences, Plant and Soil Section, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
2. Technical University of Denmark, Department of Chemical and Biochemical Engineering, Søltofts Plads 229, 2800 Kgs. Lyngby, Denmark
3. Suez Environnement. 38, Rue du President Wilson; 78230 Le Pecq, France
4. University of Copenhagen, Faculty of Science, Department of Geosciences and Natural Resource Management, Section for Forest, Nature and Biomass, Rolighedsvej 23, 1958 Frederiksberg C, Denmark
5. Roskilde University, Department of People and Technology, Universitetsvej 1, 4000 Roskilde, Denmark