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Title: Chlorine residual efficiency in inactivating bacteria from secondary contamination in Isfahan, 2002
Authors: Tavakoli, A.
Yazdani, R.
Shahmansouri, M.R.
Isfahani, B.N.
Issue Date: 2005
Language: English
Abstract: To 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
Description: 425-434
Keywords: Aeromonas hydrophila
Colony Count, Microbial
Drug Resistance,Bacterial
Enterococcus faecalis
Escherichia coli
Subject: Chlorine
ISSN: 1020-3397
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Appears in Collections:EMRO Journal Articles (EMHJ)

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