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Venturi - Passive Chlorinator Our team has designed a novel liquid chlorine doser (the Venturi) that employs properties of fluid dynamics to automatically add liquid chlorine at the point of water collection (e.g. taps), without moving parts or electricity. The Venturi’s ability to precisely dose at tap outflows across varying flow rates enables consistent dosing under the taste detection limit of most users, increasing user acceptability. The use of dilute bleach as the chlorine source enables a large potential target market because dilute bleach is widely available in low-income settings. The Venturi was originally designed by Stanford engineers to fit onto shared handpumps, commonly found in low income urban settings. The most recent version of the device was co-designed by MSR Global Health and Stanford University to fit onto shared taps at Kenyan kiosks. The Venturi uses commercially available Waterguard as its liquid chlorine source; bottles can be poured directly into the device when refills are needed. Recently we completed a field test of the chlorinator at kiosks in Kisumu, Kenya in collaboration with SWAP, PATH, and MSR Global Health. |
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Recent Manuscripts
- Pickering et. al., “Effect of in-line drinking water chlorination at the point of collection on child diarrhoea in urban Bangladesh: a double-blind, cluster-randomised controlled trial”, The Lancet Global Health (2019)
- Crider et. al., “Can you taste it? Taste detection and acceptability thresholds for chlorine residual in drinking water in Dhaka, Bangladesh”, Science of the Total Environment (2018)
- Nuhu Amin et. al., “Field trial of an automated batch chlorinator system at shared water points in an urban community of Dhaka, Bangladesh”, Journal of Water, Sanitation and Hygiene for Development (2016)
- Pickering et. al., “Differences in Field Effectiveness and Adoption between a Novel Automated Chlorination System and Household Manual Chlorination of Drinking Water in Dhaka, Bangladesh: A Randomized Controlled Trial”, PLOS ONE (2015)
