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Bactericidal Effect of Solar Water Disinfection under Real Sunlight Conditions

Boyle, M., Sichel, C., Fernandez Ibanez, P, Arias-Quiroz, G. B., Iriarte-Puna, M., Mercado, A., Ubomba-Jaswa, E. and McGuigan, K. G. (2008) Bactericidal Effect of Solar Water Disinfection under Real Sunlight Conditions. Applied and Environmental Microbiology, 74 (10). pp. 2997-3001. [Journal article]

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URL: http://dx.doi.org/10.1128/AEM.02415-07

DOI: 10.1128/AEM.02415-07

Abstract

Batch solar disinfection (SODIS) inactivation kinetics are reported for suspensions in water of Campy- lobacter jejuni, Yersinia enterocolitica, enteropathogenic Escherichia coli, Staphylococcus epidermidis, and endo- spores of Bacillus subtilis, exposed to strong natural sunlight in Spain and Bolivia. The exposure time required for complete inactivation (at least 4-log-unit reduction and below the limit of detection, 17 CFU/ml) under conditions of strong natural sunlight (maximum global irradiance, 1,050 W m 2 10 W m 2) was as follows: C. jejuni, 20 min; S. epidermidis, 45 min; enteropathogenic E. coli, 90 min; Y. enterocolitica, 150 min. Following incomplete inactivation of B. subtilis endospores after the first day, reexposure of these samples on the following day found that 4% (standard error, 3%) of the endospores remained viable after a cumulative exposure time of 16 h of strong natural sunlight. SODIS is shown to be effective against the vegetative cells of a number of emerging waterborne pathogens; however, bacterial species which are spore forming may survive this inter- vention process.

Item Type:Journal article
Keywords:Campylobacter jejuni, Yersinia enterocolitica, S. epidermidis, and non-verotoxin-producing Escherichia coli O157
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:37916
Deposited By: Dr Pilar Fernandez-Ibanez
Deposited On:30 May 2017 08:24
Last Modified:30 May 2017 08:24

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