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Evaluation of Removal Characteristics of Taste and Odor causing Compounds and Organic matters using Ozone/Granular Activated Carbon($O_{3}$/GAC) Process

오존($O_{3}$).입상활성탄(GAC) 공정을 이용한 맛.냄새 유발물질과 유기물질의 제거특성 평가

  • 함영완 (고려대학교 건축사회환경공학부) ;
  • 주영길 (고려대학교 건축사회환경공학부) ;
  • 오효근 (용인시 상하수도 사업소 정수과) ;
  • 이병욱 (용인시 상하수도 사업소 정수과) ;
  • 김현기 (용인시 상하수도 사업소 정수과) ;
  • 김덕구 ((주)도화엔지니어링 상하수도부) ;
  • 홍승관 (고려대학교 건축사회환경공학부)
  • Published : 2012.04.16

Abstract

This study assessed the removal characteristics of taste and odor causing compounds (2-methylisoborneol and geosmin) and organic matters, using a pilot-scale ozone/granular activated carbon ($O_{3}$/GAC) process treating surface water of Pal-dang reservoir in the Han river over a 3-month period. Experiments were conducted to verify the removal efficiency of $O_{3}$/GAC process which has two different empty bed contact time (EBCT) ($O_{3}$/GAC column 1 : 10 min and 2 : 15.1 min) with 10.86 min contact time of ozonation at 1.0 mg/L $O_{3}$. Spiking test using geosmin and 2-MIB was also conducted systematically to mimic the conditions when the algae appears, specifically at the levels similar to the concentrations experienced (geosmin: 250 ng/L) in the winter of 2011. In single ozonation process, organic materials, disinfection by-products (DBPs) and their precursors were disassembled but not removed completely. Meanwhile, it was verified that organic matters, taste and odor causing compounds, and DBPs were well removed when sequentially passing through the GAC process. The pilot results also showed that GAC column with larger EBCT achieved higher removal efficiency. Specifically, in spiking tests, single $O_{3}$ process showed approximately 89% removal efficiency of geosmin and 2-MIB. $O_{3}$/GAC combined process demonstrated excellent removal of geosmin and 2-MIB, which are higher than 95%.

Keywords

Geosmin;Granular activated carbon (GAC);Organic matters;Ozonation, 2-Methylisoborneol (2-MIB)

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  2. Rejection property of geosmin and 2-Methylisoborneol (MIB) with high concentration level at multi stage nanofiltration (NF) membrane system vol.28, pp.4, 2014, https://doi.org/10.11001/jksww.2014.28.4.397
  3. Study on the applicability of the ozone / AOP and activated carbon process for the removal of trace organic contaminants and taste odor causing substances vol.17, pp.2, 2015, https://doi.org/10.17663/JWR.2015.17.2.155