Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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DBPs Variation by Chlorination and Preozonation in Drinking Water

염소 및 오존소독시 정수처리공정별 소독부산물 발생 변화

  • Kim, Junsung (Department of Civil and Environmental Engineering, University of Massachusetts) ;
  • Choi, Yongwook (Department of Environmental System Engineering, Jeonju University) ;
  • Chung, Yong (Department of Preventive Medicine and Public Health, College of Medicine Yonsei University)
  • 김준성 (메사추세츠 주립대학 환경공학과) ;
  • 최용욱 (전주대학교 환경시스템학과) ;
  • 정용 (연세대학교 의과대학 예방의학교실)
  • Received : 2005.08.29
  • Accepted : 2005.10.13
  • Published : 2005.11.30
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Abstract

This study was researched for disinfection by-products (DBPs) by preozonation, prechlorination and/or postchlorination. DBPs including trihalomethanes (THMs), haloacetic acids (HAAs), halonitriles, and aldehydes were analyzed by the treatment steps of prechlorination, preozonation, sedimentation, filtration, and postchlorination comparatively. THMs were detected as $52.20{\mu}g/L$ after prechlorination and decreased during sedimentation and filtration process. The HAAs and aldehydes increased more during preozonaiton than prechlorination. However, chlorinated DBPs and aldehydes increased more by postchlorination. Chlorinated DBPs formed by preozonation increased 26% more than the chlorination process. If aldehydes were included in the total DBPs, DBPs increased up to 39% by preozonation. Preozonation could increase the removal efficiency of organic carbon during the coagulation and sedimentation processes. Ozonation might produce aldehydes that are not permitted for drinking water regulations. Also, DBPs were produced by preozonation than by chlorination. These results would bring a need for alternative disinfection studies to decrease DBPs.

Keywords

Acknowledgement

Supported by : 한국학술진흥재단

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