Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A Study on Treatment of CSOs by Vortex Separator and Continuous Fiber-Filter System

Vortex separator와 연속식 섬유사여과를 이용한 CSOs 처리연구

  • 이범준 (서울시립대학교 환경공학부) ;
  • 나지훈 (서울시립대학교 환경공학부) ;
  • 김진성 (서울시립대학교 환경공학부) ;
  • 주재영 (서울시립대학교 환경공학부) ;
  • 배윤선 (서울시립대학교 환경공학부) ;
  • 정인호 (서울시립대학교 환경공학부) ;
  • 박철휘 (서울시립대학교 환경공학부)
  • Received : 2010.01.18
  • Accepted : 2010.08.13
  • Published : 2010.08.15
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Abstract

This study was conducted to confirm the CSOs characteristics, and to estimate treatment efficiency of CSO treatment process. Flowrate was average $53,500m^3$/d, maximum $58,100m^3$/d during dry season, but after rain-fall, the flowrate was increased more than twice that of the dry season. And, water pollution concentrations, such as $COD_{Cr}$, SS, $BOD_5$, TN and TP of after rain-fall, were also increased. Thus, for more efficient treatment of pollutants during rainy season, The vortex separator and continuous fiber filter devices were used. From the results on particle range, removal efficiency of particle was 99.7% at the particle size range of $40{\sim}100{\mu}m$ but decreased as 55-80% at the below $40{\mu}m$. The removal efficiencies of $COD_{Cr}$, SS, TN and TP were approx. 70, 60, 70 and 50, respectively during the dry season and approx. 50, 50, 8 and 18% during the rainy season. Also, when compared with the primary sediment basin, $COD_{Cr}$, SS, TN and TP removal efficiencies were high. especially, at the case of TN and TP, TN was more removed than TP because of higher conversion factor value. But we needed more study for the injection of a coagulants to get more stable treatment efficiency for soluble pollutants. Consequently, This process can be used for CSOs treatment as well as replace the primary sedimentation basin during the dry season.

Keywords

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