NDLI: Point-of-use water disinfection using UV light-emitting diodes to reduce bacterial contamination.

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Point-of-use water disinfection using UV light-emitting diodes to reduce bacterial contamination.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Nelson, Kristina Y. Yost, Christopher K. Runtz, Ken J. Ono, Takaya McMartin, Dena W.
Description	Country affiliation: Canada Author Affiliation: Nelson KY ( Environmental Systems Engineering, University of Regina, 3737 Wascana Parkway, Regina, SK, S4S 0A2, Canada. kristina.nelson@sasktel.net)
Abstract	The treatment process described in this research explores the impact of exposing water samples containing fecal coliforms to the radiation produced by single ultraviolet (UV) light-emitting diodes (LEDs) operating at 265 nm. UV LEDs are long lasting, compact in size and produce more efficient light output than traditional mercury-vapour bulbs, making them ideal for application in point-of-use disinfection systems, such as in remote areas. In this study, contaminated water samples containing either a pure culture of Escherichia coli or tertiary effluent from the City of Regina Wastewater Treatment Plant were used to study the application and efficiency of using UV LEDs for water disinfection. The results indicate that bacterial inactivation was achieved in a time-dependent manner, with 1- and 2.5-log E. coli reductions in water following 20 and 50 min of UV LED exposure, respectively. Ultraviolet radiation was less effective in reducing coliform bacteria in wastewater samples due to the elevated turbidity levels. Further work remains to be completed to optimize the application of UV LEDs for point-of-use disinfection systems; however, the results from this study support that bacterial inactivation using UV LEDs is possible, meriting further future technological development of the LEDs.
ISSN	09441344
Issue Number	8
Volume Number	20
e-ISSN	16147499
Journal	Environmental Science and Pollution Research
Language	English
Publisher	Springer
Publisher Date	2013-08-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Disinfection Instrumentation Escherichia Coli Radiation Effects Ultraviolet Rays Waste Disposal, Fluid Water Pollutants Bacterial Load Methods Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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