1. Laboratory for Technical Chemistry and Environmental Engineering, Ghent University Technologiepark 9, 9052 Ghent (Zwijnaarde), Belgium (E-mail: Danielle.Baetens@vito.be)
2. Laboratory of Environmental Engineering, Helsinki University of Technology, Finland
3. Department of Environmental Science and Engineering, Technical University of Denmark
4. Department of Chemistry, University “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy
5. Department of Biochemical Engineering, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands, (E-mail: Mark.VanLoosdrecht@stm.tudelft.nl)