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Application of UV Technology for Surface Disinfection  

Cho, Min (School of Civil and Environmental Engineering, Georgia Institute of Technology)
Jeong, Woo-Dong (School of Chemical and Biological Engineering, Seoul National University)
Yoon, Je-Yong (School of Chemical and Biological Engineering, Seoul National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.29, no.9, 2007 , pp. 1020-1026 More about this Journal
Abstract
The control of pathogenic microorganisms is important issue in human environments, especially in surface area. However, surface disinfection has not been fully researched. In this study, the surface disinfection under UV irradiation was performed to investigate the quantitative kinetics for Bacillus subtilis spore inactivation in several experimental conditions, such as light intensity, temperature and surface roughness. This study reports that UV light would apparently inactivates the microorganisms and the required IT value for 2 log (99%) Bacillus subtilis spore inactivation was found to be 14.5 $mJ/cm^2$ in plain surface, as predicted by the Delayed Chick-Watson model. When UV was irradiated, there were no significant temperature effects. However, the experimental result shows that the more increased IT values are required at larger surface roughness.
Keywords
Surface Disinfection; UV Irradiation; Microbial inactivation; Bacillus subtilis spore;
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