Comparison of UV-C and UV-C LED germicidal efficiency for potable water use
Journal Title: Scientific Journal of Environmental Sciences - Year 2016, Vol 5, Issue 7
Abstract
Ultraviolet (UV) irradiation is a common disinfection option for water treatment. UV irradiation inactivates bacteria, viruses, and protozoa, with the benefits of no taste and odor issues, no known disinfection byproducts (DBPs), no danger of overdosing, relatively fast treatment rates compared to sand filtration. Ultraviolet-light-emitting diode (UV LED) contains no mercury, and its compact size and durable design offer excellent portability. The object of this study was to compare the inactivation efficiency of UV-C and UV-C LED for water disinfection. The collimated-beam system was used for this study. For the microorganisms to be tested, E. coli (ATCC 15597), which readily responds to UV light, and Bacillus subtilis sp. (ATCC 6633) were used. E. coli were 3 log inactivation of UV-C and UV-C LED applied fluence of 18 mJ/cm2 at pH 7 and Bacillus subtilis sp. were 2 log inactivation of UV-C and UV-C LED applied fluence of 40 mJ/cm2 at pH 7. UV-C LED disinfection was found to have nearly the same level of UV-C disinfection.
Authors and Affiliations
Sook Hyun Nam| Korea Institute of Civil Engineering and Building Technology, 283, Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do, 411-712, Korea., Eun Ju Kim| Korea Institute of Civil Engineering and Building Technology, 283, Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do, 411-712, Korea., Tae-Mun Hwang*| Korea Institute of Civil Engineering and Building Technology, 283, Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do, 411-712, Korea.
Keywords
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- EP ID EP1325
- DOI 10.14196/sjes.v5i7.2257
- Views 484
- Downloads 33
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