This case study from Bangladesh discusses the possibility of using waste heat from the “chulli” clay oven to pasteurise surface water.
ISLAM, M.F. ; JOHNSTON, R.B. (2006): Household Pasteurization of Drinking-water: The Chulli Water-treatment System. In: Journal of Health, Population, and Nutrition: Volume 24 , 3. URL [Accessed: 04.09.2011]