1. College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, United Kingdom
2. Research Centre for Water Environment Technology, Department of Urban Engineering, The University of Tokyo, Tokyo 113-0033, Japan
3. College of Environment and Recourses, Jilin University, Changchun 130012, China
4. Dŵr Cymru Welsh Water, Newport, NP10 8FZ, United Kingdom