Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Comparison of Taste and Odor in Raw Water from the Main Daecheong Reservoir and Its Regulating Reservoir Downstream

대청호 원수와 하류 역조정지 원수에서의 이취미 비교

  • Bae, Byung-Uk (Department of Environmental Engineering, Daejeon University) ;
  • Lee, Yu-Jeong (Daejeon Metropolitan City Institute of Health and Environment) ;
  • Lim, Mun-Gu (Department of Environmental Engineering, Daejeon University)
  • 배병욱 (대전대학교 환경공학과) ;
  • 이유정 (대전광역시 보건환경연구원) ;
  • 임문구 (대전대학교 환경공학과)
  • Received : 2008.07.08
  • Accepted : 2008.08.05
  • Published : 2008.09.30
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Abstract

The Daecheong Reservoir is the largest multi-purpose reservoir in the Keum River basin. This water supply is subject to some of the most serious taste and odor (T&O) problems in the region. The intensity of T&O events increased due to eutrophication during the 1990s. In this study, the temporal occurrence of T&O in raw water from the main Daecheong Reservoir and its regulating reservoir was compared using both an instrumental method (CLSA+GC/MS) and threshold odor number (TON) test from April to December 2006. In addition, biofilms on the submerged macrophytes and rocks were analyzed for two typical T&O causing compounds, Geosmin and 2-MIB. The maximum concentration of Geosmin in the main reservoir was almost two times higher than that in the regulating reservoir. Interestingly, 2-MIB was only detected in water samples from the main reservoir. In the case of T&O causing compounds present in the biofilm on the submerged macrophytes and rocks, the regulating reservoir had lower concentrations compared to those of the main reservoir. It was found that both Geosmin and 2-MIB were detected from the biofilms much earlier than from the water samples. This result suggests that the occurrence of T&O compounds in the biofilms could be used as an early warning indicator of an imminent T&O outbreak in the water body.

Keywords

Acknowledgement

Supported by : 대전환경기술개발센터

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