상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제20권4호
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  • Pages.627-635
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  • 2006
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  • 1225-7672(pISSN)
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  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
권호 표지

합류식 하수관거 월류수의 지표미생물 배출 특성

Discharge Characteristics of the Indicator Microorganisms of Combined Sewer Overflows

  • 김건하 (한남대학교 공과대학 토목환경공학과)
  • 투고 : 2006.05.17
  • 심사 : 2006.07.27
  • 발행 : 2006.08.15
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초록

Combined sewer overflow (CSOs) is a primary diffuse source degrading water quality of urban streams. In this study, CSOs caused by 5 different rainfall events at an urban watershed located in Daejeon city were monitored for the indicator microorganism concentrations. Event mean concentration (EMC) of the indicator microorganisms were: total coliform = $2.46{\times}10^6CFU/100mL$; fecal coliform = $1.01{\times}10^6CFU/100mL$; E.coli = $5.20{\times}10^5CFU/100mL$; and Fecal Streptococci = $6.08{\times}10^5CFU/100mL$. In addition, coliform concentrations were well correlated with suspended solid concentrations and the first flush effects were identified. Settling tests were carried out to estimate removal rate of indicator organisms by sedimentation from CSOs. As microorganisms are discharged in association with suspended solid, ten minutes of settlement can lower 44% of indicator microorganism leading.

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