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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 20, No. 4, 2016, pp. 955-962
Bioline Code: ja16100
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 20, No. 4, 2016, pp. 955-962

 en Evaluation of Escherichia coli check for this species in other resources as Indicator of Point-of-Use Chlorination Efficiency of Drinking Water
OLUSOJI, O. ADEBISI; IFEYINWA, S. OBUEKWE; FOLAHANMI, T. AKINSOLU & ALBERT, B. OLAYEMI

Abstract

In this study, the relevance of the presence of Escherichia coli check for this species in other resources in drinking water as an indicator of point-of-use chlorination efficiency is examined. The survival of clinical isolates of human enteric pathogenic bacteria ( Klebsiella pneumoniae check for this species in other resources , Pseudomonas aeruginosa check for this species in other resources , Salmonella typhi check for this species in other resources , Shigella dysenteriae check for this species in other resources , Staphylococcus aureus check for this species in other resources , Streptococcus faecalis check for this species in other resources and Vibrio cholerae check for this species in other resources ) as well as E. coli was monitored as a function of effective germicidal concentration and contact time. The inactivation kinetics indicated that the minimum effective dose for three-log units (99.9%) inactivation of E. coli (C·T99.9% = 10 mgl-1-min) can sufficiently eliminate the other pathogens (C·T99.9% ranged from 5.6–10.5 mgl-1-min); the exception being K. pneumoniae, which required more than 1.4-times higher dose. In general, the results implied that the branded hypochlorite solution should effectively inactivate almost all vegetative bacteria in household drinking water at the manufacturer’s recommended dosage of 0.5 mgl-1 after at least 30 minutes contact time. The application of point-of-use chemical disinfectants to drinking water in households will significantly reduce the incidence of water-borne infections particularly in rural communities where central treatment of water is mostly unavailable.

Keywords
Effective dose; Point-of-use disinfectants; Indicator bacteria; Pathogen; Escherichia coli; Chlorination

 
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