[1] Malawi Univ Business & Appl Sci, Ctr Water Sanitat Hlth & Appropriate Technol Dev, Private Bag 303, Blantyre 312225, Malawi
[2] Univ KwaZulu Natal, Sanitat & Hyg Res & Dev Ctr, 2Water, Durban, South Africa
[3] Univ Northern British Columbia, Prince George, BC, Canada
[4] Gwanda State Univ, Harare, Zimbabwe
[5] Univ Utrecht, Utrecht, Netherlands
[6] Univ Strathclyde, Dept Civil & Environm Engn, Glasgow, Scotland
[7] Parakata RSR, Mexico City, Mexico
[8] Nelson Mandela African Inst Sci & Technol, WISE Futures Ctr, Arusha, Tanzania