1. Postdoc, Institute for Water and Wastewater Technology, Durban Univ. of Technology, PO Box 1334, Durban 4000, South Africa.
2. Assistant Professor, Dept. of Civil Engineering, National Institute of Technology, Srinagar, Jammu and Kashmir 190006, India; Honorary Research Associate, Institute for Water and Wastewater Technology, Durban Univ. of Technology, PO Box 1334, Durban 4000, South Africa. ORCID: .
3. Professor, Institute for Water and Wastewater Technology, Durban Univ. of Technology, PO Box 1334, Durban 4000, South Africa.
4. Senior Lecturer, Dept. of Civil Engineering and Geomatics, Durban Univ. of Technology, PO Box 1334, Durban 4000, South Africa.
5. Professor, Institute for Water and Wastewater Technology, Durban Univ. of Technology, PO Box 1334, Durban 4000, South Africa (corresponding author).