Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
권호 표지

Internal Short-circuiting Estimation in Clearwell : Part B. Improving T10/T Using Intra Basin and Diffuser Wall by Applying ISEM to Field

정수지 내부 단락류 발생 평가 : Part B. 내부 단락류 평가 방법의 현장 적용을 통한 내부 도류벽과 정류벽을 이용한 T10/T 증가분석

  • 신은허 (KAIST 건설 및 환경공학과) ;
  • 이승재 (KAIST 건설 및 환경공학과) ;
  • 김성훈 (KAIST 건설 및 환경공학과) ;
  • 박희경 (KAIST 건설 및 환경공학과)
  • Received : 2007.11.23
  • Accepted : 2008.01.30
  • Published : 2008.02.15
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Abstract

A large majority of clearwell must be modified with maintaining the present baffles since they were underground built with the material like concrete. Therefore it is unreasonable to apply the previous research in clearwell modification which is studied with the assumption that distance between baffles is constant. In this study, internal short-circuiting estimation method (ISEM), which has the advantage of being applied at any condition, is applied to evaluate modification of A clearwell and modify B and C clerwell which have unusual characteristics. After analyzing the hydraulic efficiency at current state, modifications, where baffles, intra basins and diffuser walls are additionally installed, are considered and evaluate using ISEM. And the effect of intra basin and diffuser wall on $T_{10}/T$ is estimated and application feasibility of ISEM is evaluated. The improvement of intra basins is almost same with that of baffles. Also, short-circuiting in effluent zone can be reduced with the same level of channel zone if intra basin is added in effluent zone. However, effect range is restricted to the next channel zone. Diffuser wall can obtain the lower ISI than minimum ISI of cases where baffles and intra basins are installed. Therefore, additional improvement of $T_{10}/T$ value can be expected after $T_{10}/T$ value converges maximum only using baffles

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References

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