1. State
Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150090, PR China
2. Department
of Chemical Engineering, Process Engineering for Sustainable Systems
(ProcESS), KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
3. Faculty
of Engineering and the Built Environment, Tshwane University of Technology, Private Bag X680, Pretoria 0001, South Africa