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

R. Nalwanga, B. Quilty, C. Muyanja, Pilar Fernandez-Ibanez, K.G. McGuigan

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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 (
Original languageEnglish
Pages (from-to)195-202
JournalSolar Energy
Early online date31 Dec 2013
Publication statusE-pub ahead of print - 31 Dec 2013



  • Solar disinfection (SODIS)
  • Enhancement technologies
  • Compound parabolic collector (CPC)
  • Point of use water treatment

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