Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Effects of Inflow Fluctuation on the Removal Efficiency in Low Strength Sewage Treatment using Sequencing Batch Reactor Process during Rainfall

강우시 저농도 고수리부하가 회분식 반응조 제거효율에 미치는 영향

  • Oa, Seongwook (Department of Railroad, Civil & Environmental Engineering, Woosong University) ;
  • Kim, Geonha (Department of Civil & Environmental Engineering, Hannam University) ;
  • Son, Bongho (Department of Railroad, Civil & Environmental Engineering, Woosong University)
  • 어성욱 (우송대학교 철도건설환경공학과) ;
  • 김건하 (한남대학교 토목환경공학과) ;
  • 손봉호 (우송대학교 철도건설환경공학과)
  • Received : 2005.09.02
  • Accepted : 2005.11.01
  • Published : 2006.01.30
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Abstract

Many small scale Sewage Treatment Plants (STPs) are currently being constructed at many rural areas. The STPs in rural area suffer from low concentration and large inflow quantity fluctuation during wet weather mainly due to illicit combined sewer system. Sequencing Batch Reactor (SBR) is a process effectively coping with these obstacles. The main objective of this study was to evaluate SBR with high hydraulic loading and low inflow concentration. The operating conditions tested were: organic loading rate = $0.17-0.42KgBOD/m^3/d$, hydraulic loadings = $12.1-61.5m^3/m^2/d$, average MLSS concentration = 2500 mg/L, F/M ratio = 0.026-0.17 KgBOD/Kg MLSS, HRT = 9-12 hr HRT, and SRT = 5.6-33.6 days. Organic loading rate on SBR did not impact significantly on BOD and SS removal efficiencies. To increase treatment efficiencies, low hydraulic loading rate with low concentration was required. The results suggested that low influent concentration with high inflow rates during wet weather requires extended time for settling.

Keywords

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