1. KU Leuven, Faculteit Industriële Ingenieurswetenschappen, Campus Groep T Leuven, Leuven, B-3000, Belgium
2. Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom
3. Water Research Group, Department of Civil Engineering, University of Cape Town, Rondebosch, 7700, South Africa