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Disinfection Efficiency of Medium Pressure UV Lamp on Major Bacteria in Sand Filtered Water  

Ahn, Seoung-Koo (Department of Environmental Engineering, University of Seoul)
Yang, Yoon-Yong (Korean Bioinformation Center, Korea Research Institute of Bioscience & Biotechnology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.32, no.12, 2010 , pp. 1141-1146 More about this Journal
Abstract
Isolated the heterotrophic aerobic bacteria in sandfiltered water on NA and TSBA solid medium, selected 8 dominant species and identified by Sherlock System. Each samples are irradiated 0, 5, 16, 40 and $60\;mJ/cm^2$ using on CBD (Collimated Beam Device) Medium Pressure UV lamp after these identified bacterium did liquid culture how to make $10^6{\sim}10^7\;cells/mL$ suspended in dilution water. Then cultured bacteria are estimated inactivation rate on plate media. Identified Gram positive group are Bacillus Subtilus, Bacillus megaterium, Rhodococcus erythropolis and Microbacterium laevaniformans; Gram negative group are Pseudomonas vesicularis, Pseudomonas pseudoflava, Alcaligenes paradoxus and Zooglea ramigera. These isolation of bacterium are more stronger reference strain and high resistance of MP UV irradiation, Besides Gram negative bacterium are more sensitive Gram positive bacterium on MP UV dose. Now we are estimating to $60{\sim}100\;mJ/cm^2$ MP UV dose for efficient disinfection in water treatment plant.
Keywords
Heterotrophic Bacteria; Medium Pressure UV Lamp; Gram Positive; Water Treatment Plant; Disinfection;
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