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Investigating the microbial inactivation efficiency of a 25 L batch solar disinfection (SODIS) reactor enhanced with a compound parabolic collector (CPC) for household use

Ubomba-Jaswa, Eunice, Fernandez Ibanez, P, Navntoft, Christian, Polo-López, M. Inmaculada and McGuigan, Kevin G. (2010) Investigating the microbial inactivation efficiency of a 25 L batch solar disinfection (SODIS) reactor enhanced with a compound parabolic collector (CPC) for household use. Journal of Chemical Technology & Biotechnology, 85 (8). pp. 1028-1037. [Journal article]

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URL: http://dx.doi.org/10.1002/jctb.2398

DOI: 10.1002/jctb.2398

Abstract

BACKGROUND: A simple point-of-use solar disinfection (SODIS) reactor was designed to treat 25 L of water and was constructed from a methacrylate tube placed along the linear focus of a compound parabolic concentrator (CPC) and mounted at 37◦ inclination. Experiments were carried out over a 7 month period by seeding a 106 CFU mL−1 concentration of Escherichia coli K-12 in 25 L of well water or turbid water to mimic field conditions and determine the microbial effectiveness of the reactor.RESULTS: During periods of strong sunlight, complete inactivation of bacteria occurred in under 6 h, even with water temperatures <40◦C. Under cloudy and low solar intensity conditions, prolonged exposure was needed. Turbid water (100 NTU) was disinfected in 7 h with water temperatures >50 ◦ C. No regrowth of bacteria occurred within 24 h and 48 h following solar disinfection. The construction cost of this prototype reactor was approximately US$200 but with an expected lifetime of 10 years, the running cost of the reactor is expected to be US$0.002 L−1.CONCLUSION: This study confirms that significant water disinfection can be achieved using a low cost CPC-enhanced 25 L batch SODIS reactor.

Item Type:Journal article
Keywords:solar disinfection (SODIS); household water treatment; Escherichia coli; compound parabolic concentrator (CPC); enhanced batch reactor (EBR)
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:37905
Deposited By: Dr Pilar Fernandez-Ibanez
Deposited On:30 May 2017 08:18
Last Modified:17 Oct 2017 16:29

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