Comparison of Chlorine, Chlorine Dioxide and Ozone as Disinfectants in Drinking Water

정수소독공정에 이용되는 염소, 이산화염소, 오존 소독제의 비교, 고찰에 관한 연구

  • Lee, Yoon-Jin (Department of Environmental Engineering, Konkuk University) ;
  • Lee, Sun-Jong (Department of Environmental Engineering, Konkuk University) ;
  • Lee, Dong-Chan (Department of Environmental Engineering, Konkuk University) ;
  • Kim, Hyun (Department of Environmental Engineering, Konkuk University) ;
  • Lee, Hwan (OIKOS Co., Ltd.) ;
  • Lee, Cheol-Hyo (OIKOS Co., Ltd.) ;
  • Nam, Sang-Ho (Department of Environmental Engineering, Konkuk University)
  • 이윤진 (건국대학교) ;
  • 이선종 (건국대학교) ;
  • 이동찬 (건국대학교) ;
  • 김현 (건국대학교) ;
  • 이환 ((주)오이코스) ;
  • 이철효 ((주)오이코스) ;
  • 남상호 (건국대학교)
  • Published : 2002.09.01

Abstract

The experiments for the characterization of inactivation were performed in a series of batch processes with the total coliform as a general indicator organism based on chlorine, chlorine dioxide and ozone as disinfectants. The water sam-ples were taken from the outlet of settling basin in a conventional surface water treatment system that is provided with the raw water drawn from the mid-stream of the Han River. The inactivation of total coliform was experimentally ana-lyzed for the dose of disinfectant contact time, pH, Temperature and DOC. The nearly 2.4,3.0,3.9 log inactivation of total coliform killed by injecting 1 mか1 at 5 minutes for chlorine, chlorine dioxide and ozone. For the inactivation of 99.9%(3 log), Disinfectants required were 1.70, 1.00 and 0.60 mか1 for chlorine, chlorine dioxide and ozone, respec-tively. The higher the pH is, the poorer the disinfections effects are in the range of pH 6-9 by using chlorine and ozone. But the irfluence of pH value on killing effects of chlorine dioxide is weak. The parameters estimated by the models of Chick-Watson, Hom, and Selleck from our experimental data obtained for chlorine are: log(N/ $N_{0}$ )=-0.16 CT with n= 1, log(N/ $N_{0}$ )=-0.71 $C^{0.87}$T with n$\neq$1, for Chicks-Watson model, log (N/ $N_{0}$ )= -1.87 $C^{0.47}$ $T^{0.36}$ for Hom model. For chlorine dioxide are: log(N/ $N_{0}$ )= -1.53 CT with n = 1, log(N/ $N_{0}$ )= -2.29 $C^{0.94}$T with n$\neq$1,, for Chicks-Watson model, log(N/ $N_{0}$ )= -3.64 $C^{0.43}$ $T^{0.24}$ for Hom model and for ozone are: log(N/ $N_{0}$ )= -2.59 CT with n = 1, log(N/ $N_{0}$ )= -2.28 $C^{0.36}$T with n$\neq$1, for Chicks-Watson model, log(N/ $N_{0}$ )= -4.53 $C^{0.26}$ $T^{0.19}$ for Hom model.19/ for Hom model.

Keywords

Chlorine;Chlorine dioxide;Ozone;Total

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