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Feasibility Study of UV-Disinfection for Water Reuse of Effluent from Wastewater Treatment Plant  

윤춘경 (건국대학교 대학원 지역건설환경공학과)
정광욱 (건국대학교 대학원 지역건설환경공학과)
함종화 (건국대학교 대학원 지역건설환경공학과)
전지홍 (건국대학교 대학원 지역건설환경공학과)
Publication Information
Magazine of the Korean Society of Agricultural Engineers / v.45, no.2, 2003 , pp. 126-137 More about this Journal
Abstract
The feasibility study of UV-disinfection system was performed for disinfection of effluent from wastewater treatment plant. Three low-pressure UV lamps of 17, 25, and 41 W were examined with various flow rates. Low-pressure UV lamps of 17W were examined with various turbidity, DOM (dissolved organic matter), and SS (suspended solid). The pilot plant was a flow-through type UV-disinfection system, and the range of exposure time varied from 5 to 40 seconds, turbidity from 0 to 40 NTU, DOM from 0 to 30 mg/L, and SS from 10 to 40 mg/L. The 41W lamp demonstrated complete disinfection showing no survival ratio in all the experimental conditions, and generally 17W and 25W lamps also showed high removal ratio over 97%. For the same UV dose (UV intensity times exposure time), high intensity-short exposure conditions showed better disinfection efficiency than low intensity-long exposure conditions. While the effects of turbidity and DOM were not apparent, the effects of SS was significant on the disinfection efficiency which indicates that SS control before UV-disinfection appears to be necessary to increase removal efficiency. Considering characteristics of effluent from existing wastewater treatment plants, cost-effectiveness, stable performance, and minimum maintenance, the flow-through type UV-disinfection system with high intensity and low-pressure lamps was thought to be a competitive disinfection system for wastewater reclamation.
Keywords
Water reuse; UV-disinfection; Line-throw type; UV dose; Turbidity; Dissolved organic matter; Suspended solid; Treatment efficiency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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