The Journal of Health, Population and Nutrition
Vol. 24, No. 3, 2006, pp. 356-362
Bioline Code: hn06044
Full paper language: English
Document type: Research Article
Document available free of charge
The Journal of Health, Population and Nutrition, Vol. 24, No. 3, 2006, pp. 356-362
© Copyright 2006 - ICDDR,B: Centre for Health and Population Research
Household Pasteurization of Drinking-water: The Chulli Water-treatment System|
Islam, Mohammad Fakhrul & Johnston, Richard B.
A simple flow-through system has been developed which makes use of wasted heat generated in traditional clay ovens (chullis) to pasteurize surface water. A hollow aluminium coil is built into the clay chulli, and water is passed through the coil during normal cooking events. By adjusting the flow rate, effluent temperature can be maintained at approximately 70°C. Laboratory testing, along with over 400 field tests on chulli systems deployed in six pilot villages, showed that the treatment completely inactivated thermotolerant coliforms. The chulli system produces up to 90 litres per day of treated water at the household level, without any additional time or fuel requirement. The technology has been developed to provide a safe alternative source of drinking-water in arsenic-contaminated areas, but can also have wide application wherever people consume microbiologically-contaminated water.
Drinking-water; Arsenic; Arsenic contamination; Water treatment; Water quality; Pasteurization; Bacteria; Disinfection; Water supply; Thermal inactivation; Bangladesh
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