Chlorine residual efficiency in inactivating bacteria from secondary contamination in Isfahan, 2002
AbstractTo investigate the inactivation of potential pathogens, we evaluated survival rates for Escherichia coli, Enterococcus faecalis, Aeromonas hydrophila and Salmonella typhi in samples taken from the Isfahan drinking water system. Chlorine residual, pH, temperature and total organic carbon levels were measured. The organism most sensitive to chlorine was A. hydrophila. It was inactived in < 100 minutes at chlorine levels of 0.11 mg/L to 0.90 mg/L. The other 3 organisms showed higher resistance. E. coli tolerated 0.30 mg/L chlorine for > 1000 minutes while Ent. faecalis and S. typhi survived at total chlorine concentration of 0.50 mg/L for 100 minutes. We concluded that total chlorine levels of less than 0.71 mg/L in water supply systems cannot provide the recommended safety levels
Tavakoli, A., Yazdani, R., Shahmansouri, M.R. & Isfahani, B.N. (2005). Chlorine residual efficiency in inactivating bacteria from secondary contamination in Isfahan, 2002. http://www.who.int/iris/handle/10665/116963
EMHJ - Eastern Mediterranean Health Journal, 11 (3), 425-434, 2005
MetadataShow full item record
Showing items related by title and MeSH subject.
Principles and practices of drinking-water chlorination: a guide to strengthening chlorination practices in small-to medium sized water supplies. World Health Organization. Regional Office for South-East Asia (2017)The WHO/AusAID (DFAT) Partnership for Water Quality and Health has been promoting Water Safety Plans (WSPs) in SEARO countries for more than 10 years. WSPs are designed to benefit all water users by ensuring improved water quality throughout a water supply system and are seen as a way of improving health and enhancing system sustainability. One of the biggest challenges for sustainable implementation of WSPs and delivery of safe water, especially for smaller systems, is good chlorination practice. WHO contracted a water treatment expert ...