A Study on First Flush Storage Tank Design for Combined Sewer Overflows (CSOs) Control

합류식하수도 월류수 관리를 위한 초기우수 저류조 설계방안 연구

  • Son, Bongho (Railroad & Soil Environment Research Center, Woosong University) ;
  • Oa, Seongwook (Department of Railroad, Civil & Environmental Eng. Woosong University)
  • 손봉호 (우송대학교 철도.토양환경연구센타) ;
  • 어성욱 (우송대학교 철도건설시스템학과)
  • Received : 2011.06.08
  • Accepted : 2011.07.13
  • Published : 2011.09.30

Abstract

One of the best way to control Combined Sewer Overflow (CSO) is proposed to construct first flush storage tank. But there is little known parameters for optimum design of these facilities. This study was conducted to get optimum design parameters for a first flush storage tank construction. The optimization of the tank is generally based upon some measure of SS(Suspended Solid) mass holding efficiency. Water quality deterioration of receiving water body happened right after first time occurring rainfall in dry weather seasons. So, design rainfall intensity is used at 2 mm/hr for peak of monthly average intensities of dry seasons. The capacities for each evaluated catchment are designed from 14.4 min to 16.1 min HRT of CSOs flow at design rainfall intensity. Owing to all storage tanks are connected to interception sewer having a redundancy, the suggested volume could be cut down.

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