Royal College of Surgeons in Ireland
Browse
Evaluation of Solar Disinfection of E. coli Under Sub-Saharan Fie.pdf (672.86 kB)

Evaluation of Solar Disinfection of E. coli Under Sub-Saharan Field Conditions Using a 25 Litre Borosilicate Glass Batch Reactor Fitted with a Compound Parabolic Collector.

Download (672.86 kB)
journal contribution
posted on 2019-11-22, 17:02 authored by R Nalwanga, B Quilty, C Muyanja, P Fernández Ibáñez, Kevin G. McGuigan

The bacterial inactivation efficacy of a solar water disinfection (SODIS) reactor consisting of a 25L borosilicate glass tube fitted with a compound parabolic collector (BGTR-CPC) was assessed under equatorial weather conditions in Uganda. The SODIS BGTR-CPC was tested over a 17-month period in Sub-Saharan conditions in Kampala, Uganda. The BGTR-CPC was filled with natural water from a nearby protected well. A wild strain of Escherichia coli isolated from local natural water was added to the reactor to give a starting population of between 105 and 107 CFU/100ml. This spiked water was exposed to natural sunlight. Satisfactory bacterial inactivation (log10 reduction values >6 units or inactivation to below the limit of detection (/100ml.)) 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-Saharan and other similar tropical climates if careful consideration of the cloud cover and rainfall is taken into account.

Funding

Funding was provided by the Irish Aid/HEA Programme for Strategic Cooperation and is gratefully acknowledged. Financial support by The Access to Research Infrastructures activity FP7-SFERA (Grant No. 228296) is also gratefully acknowledged.

History

Comments

This article is also available at http://www.journals.elsevier.com/solar-energy/

Published Citation

Nalwanga R, Quilty B, Muyanja C, Fernandez-Ibanez P, McGuigan KG. Evaluation of Solar Disinfection of E. coli Under Sub-Saharan Field Conditions Using a 25 Litre Borosilicate Glass Batch Reactor Fitted with a Compound Parabolic Collector. Solar Energy. 2014;100:195-202.

Publication Date

2014-01-01

Department/Unit

  • Physiology and Medical Physics