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Photocatalytic enhancement of solar water disinfection for application in developing regions

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Dunlop, PSM, Alrousan, DM, Polo-Lopez, MI, Fernandez-Ibanez, P and Byrne, JA (2009) Photocatalytic enhancement of solar water disinfection for application in developing regions. In: International Workshop on Urbanisation, Land Use, Land Degradation, and Environment, Denizli, Turkey. NAM S&T Centre; Pamukkale University. 7 pp. [Conference contribution]

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Abstract

Solar water disinfection (SODIS) is an effective, simple, household level, point-of-use technology suitable for application in developing countries. Contaminated water is placed in a plastic container (typically a 2L PET bottle) and exposed to sunlight for at least 6 hours. Laboratory and field trials have demonstrated SODIS to effective against a wide range of waterborne pathogens with health impact assessments demonstrating significant benefits from consumption of SODIS treated water. Photocatalytic (PC) enhancement of the SODIS process could provide larger volumes of safe drinking water and reduce the sunlight exposure time.Pilot scale, modular PC-SODIS reactors were designed and constructed from low-cost materials and tested, under real sunlight the south of Spain, for their efficiency to disinfect water containing ~1 x106 Escherichia coil cells/mL. The inclusion of an immobilised nanostructured titanium dioxide coating within 1.25 L static batch and 7 L re-circulating reactors accelerated the rate of disinfection with 6-log kill observed in 3 hours. Complete disinfection was not observed in re-circulating SODIS reactors. Photocatalytic enhancement was observed during full sun and cloudy weather conditions.

Item Type:Conference contribution (Paper)
Keywords:photocatalysis; titanium dioxide; disinfection; SODIS; pilot-scale
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:14014
Deposited By:Dr Patrick Dunlop
Deposited On:02 Jun 2010 09:15
Last Modified:18 Aug 2011 11:16

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