Nalwanga R., Quilty B., Muyanja C., Fernandez-Ibañez P., McGuigan K.G.
Dept. of Physiology and Medical Physics, Royal College of Surgeons, Dublin, Ireland; School of Biotechnology, Dublin City University, Dublin, Ireland; School of Food Technology and Nutrition Makerere University, Kampala, Uganda; Plataforma Solar de Almería - CIEMAT, P.O. Box 22, 07200 Tabernas, Almería, Spain
Nalwanga, R., Dept. of Physiology and Medical Physics, Royal College of Surgeons, Dublin, Ireland, School of Biotechnology, Dublin City University, Dublin, Ireland; Quilty, B., School of Biotechnology, Dublin City University, Dublin, Ireland; Muyanja, C., School of Food Technology and Nutrition Makerere University, Kampala, Uganda; Fernandez-Ibañez, P., Plataforma Solar de Almería - CIEMAT, P.O. Box 22, 07200 Tabernas, Almería, Spain; McGuigan, K.G., Dept. of Physiology and Medical Physics, Royal College of Surgeons, Dublin, Ireland
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 17month 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 107CFU/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 (<1CFU/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. © 2013.
Bacterial inactivation; Borosilicate glass batches; Compound parabolic collector; Enhancement technologies; Limit of detection; Point of use; Solar disinfection; Solar water disinfection; Batch reactors; Borosilicate glass; Escherichia coli; Rain; Disinfection; bacterium; cloud cover; disinfection; drinking water; fieldwork; glass; rainfall; silicate; solar power; water treatment; Kampala; Uganda; Bacteria (microorganisms); Escherichia coli