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Evaluation of solar disinfection of E. coli under Sub-Saharan field conditions using a 25L borosilicate glass batch reactor fitted with a compound parabolic collector

Nalwanga, R., Quilty, B., Muyanja, C., Fernandez-Ibanez, Pilar and McGuigan, K.G. (2013) Evaluation of solar disinfection of E. coli under Sub-Saharan field conditions using a 25L borosilicate glass batch reactor fitted with a compound parabolic collector. Solar Energy, 100 . pp. 195-202. [Journal article]

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URL: http://dx.doi.org/10.1016/j.solener.2013.12.011

DOI: doi:10.1016/j.solener.2013.12.011

Abstract

The bacterial inactivation efficacy of a solar water disinfection (SODIS) reactor consisting of a 25 L borosilicate glass tube fitted witha compound parabolic collector (BGTR-CPC) was assessed under equatorial weather conditions in Uganda. The SODIS BGTR-CPCwas tested over a 17 month period in Sub-Saharan conditions in Kampala, Uganda. The BGTR-CPC was filled with natural water froma nearby protected well. A wild strain of Escherichia coli isolated from local natural water was added to the reactor to give a startingpopulation of between 105 and 107 CFU/100 ml. This spiked water was exposed to natural sunlight. Satisfactory bacterial inactivation(log10 reduction values >6 units or inactivation to below the limit of detection (<1 CFU/100 ml)) was observed for 11 of 13 experiments.Rainfall and overcast/cloudy conditions were factors on both of the occasions when incomplete inactivation was observed. In conclusion,the use of CPC SODIS technology is suitable for treating drinking water both at household level and institutional level in Sub-Saharanand other similar tropical climates if careful consideration of the cloud cover and rainfall is taken into account.

Item Type:Journal article
Keywords:Solar disinfection (SODIS); Enhancement technologies; Compound parabolic collector (CPC); Point of use water treatment
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:36793
Deposited By: Dr Pilar Fernandez-Ibanez
Deposited On:15 Feb 2017 13:41
Last Modified:17 Oct 2017 16:27

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