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Heterotrophic Bacteria in Terms of Free Chlorine Residuals in water Distribution Systems  

Yoon, Tae-Ho (Water Technology Research Institute Seoul Metropolitan Government, Water Quality Research Division)
Lee, Yoon-Jin (Dept. of Environmental Engineering, Konkuk University)
Rhee, Ok-Jae (Water Technology Research Institute Seoul Metropolitan Government, Water Quality Research Division)
Lee, Euk-Wang (Water Technology Research Institute Seoul Metropolitan Government, Water Quality Research Division)
Kim, Hyun (Dept. of Environmental Engineering, Konkuk University)
Lee, Dong-Chan (Dept. of Environmental Engineering, Konkuk University)
Nam, Sang-Ho (Dept. of Environmental Engineering, Konkuk University)
Publication Information
Journal of Environmental Health Sciences / v.28, no.3, 2002 , pp. 9-18 More about this Journal
Abstract
This study was to observe the occurrence of heterotrophic bacteria in terms of free chlorine residuals in two different water distribution systems belong to both K and Y water treatment plant. The data analyzed in this study showed that in distribution systems(DS), the free chlorine residuals were decreased from 0.10 to 0.56 ㎎/1 for K, and 0.51 and 0.78 ㎎/l for Y The decay of free chlorine were clearly higher in both March and August than those in January. The HPC in DS were ranged from 0 to 40 CFU/ml for K,0 to 270 CFU/ml for Y, on R2A medium. In particular, Its level was relatively high at consumers' ground storage tanks, taps and point-of-end area of Y, The predominant genera found in the distribution systems were Acinetobacter, Sphingomonas (branch of Pseudomonas), Microroccus, Bacillus, Staphylococcus. The diversity of heterotrophic bacteria was increased in the end-point area. Most of them were either encapsulated cells or cocci of gram-positve. In conclusion, the point-of-end area in distribution systems showed that the longer flow distance from WTP the greater diversity and higher level of heterotrophic bacteria due to the significant decay of free chlorine residuals.
Keywords
Heterotrophic bacteria; Chlorine residuals; Distribution systems;
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1 조용모, 홍헌표, 이연희 : 수돗물 직결공급체계 도입에 관한 연구. 서울시정개발연구원, 125-132, 1996
2 LeChevallier, M. w., Babcock, T. S. and Lee, R. G. : Examination and characterization of distribution system biofilms. Appl. Environ. Microbial., 53(12), 2714-2724, 1987
3 Geldreich, E. E., Fox, K. R., Goodrich, J. A., Rice, E. W., Clark, R. M. and Swerdlow, D. L. : Searching for a water supply connection in the cabool. Missouri, Decease Outbreak of Escherichia coli 0157 H7, Wat. Res., 26(8), 1127-1137, 1992
4 서울시 : 저수조 실태조사 및 개선방안 연구. 수도기술연구소, 92-112, 1999
5 박성주 : 상수도 급수계통에서의 세균 재생장 및 생물막 형성에 관한 연구. 서울대학교 박사학위논문, 98-104, 1993
6 조용모, 조항문, 이연희 : 효율적인 배수계통 구축에 관한 연구. 서울시정개발연구원, 25-35, 1998
7 조영희 : 수돗물에서 BDOC가 세균의 소독과 재증식에 미치는 영향. 건국대학교 석사학위논문, 3-15, 1996
8 한국수도협회 : 저수조(물탱크)의 위생관리. 12-13, 1995
9 LeChevallier, M. W., Cawthon, C. D. and Lee, R. G. : Factors promoting survival of bacteria in contami-nated water supplies. Appli. Environ., Microbial., 54(3), 649-654, 1988
10 LeChevallier, M. W., Cameron, S. C. and McFeters, G. A.: New medium for improved recovery of coliform bacteria from drinking water. Appli. Envi-ron., Microbial., 45(2), 484-492, 1982
11 Reilly, J. K. and Kippin, J. S. : Relationship of bac-terial counts with turbidity and free chlorine in two distribution systems. J. AWWA, 75(2), 309-312, 1983
12 이현동, 정원식, 문숙미 : 상수도 배관망에서의 수질변화에 관한 연구. 대한 상하수도학회지, 11(3), 59-65, 1997
13 Charaklis, W. G. and Marshall, K. C. : Biofilms, John Wiley & Sons Inc., New York, 20-36, 1990
14 Stewart, M. H. and Olson, B. H.: Mechanisms of bacterial resistance to inorganic chloramines. Proceeding of the AWWA Water Quality Technology Conference, Portland, Denver, 1986
15 Payment, P., Gamache, F. and Paquette, G. : Compar-ison of microbiological data from two water filtra-tion plants and their distribution system. Water Sci. Technol., 21(3), 287-289, 1989