1. a Faculty of Civil Engineering and Geosciences, Section Sanitary Engineering, Department of Water Management, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, The Netherlands
2. b NX Filtration, Nanotechnology Research, Josink Esweg 44, 7545 PN, Enschede, The Netherlands
3. c Faculty of Applied Science, Department of Biotechnology, Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands
4. d Department of Biotechnology and Food Science, Norwegian University of Science and Technology, N-7491, Trondheim, Norway