Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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A Study on Autocontrolled SBR for Biological Nutrient Removal with External Carbon Sources

외부탄소원 주입시 영양염류의 생물학적 제거를 위한 자동제어 SBR 공정에 관한 연구

  • Lee, Byung-hun (Division of Environmental System Engineering, Pukyong National University) ;
  • Kang, Seong-jae (Division of Environmental System Engineering, Pukyong National University) ;
  • Lim, Sung-il (Division of Environmental System Engineering, Pukyong National University) ;
  • Yoo, Pyung-jong (Department of Environmental Conservation, Pusan Metropolitan City)
  • 이병헌 (부경대학교 환경공학과) ;
  • 강성재 (부경대학교 환경공학과) ;
  • 임성일 (부경대학교 환경공학과) ;
  • 유평종 (부산광역시 환경보전과)
  • Published : 2002.12.31
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Abstract

The purpose of this study is to develop effective operating process in order to achieve more suitable conditions of Anoxic-Oxic-Anoxic-Stripper(AOAS) SBR through real-time control. To improve the removal efficiency, glucose, methanol and synthetic food waste acid fermentant were added as an external carbon source, In the case of glucose and synthetic food waste acid fermentant, TN, TP were removed to average 86.9%, 73.0% respectively. Methanol was removed to average 64.6%, 55.4% respectively. The synthetic food waste acid fermentant proved to be the most efficient and allowed for the substitution of an external carbon source. The removal rate of $COD_{Cr}$, was approximately 90% at all cases. The results of the study that a correlation between ORP (Oxidation-Reduction Potential), pH and DO and nitrification or denitrification when an external carbon source is added and when it isn't was showed that ${\Delta}ORP$ is suitable parameter. ORP reacted properly to denitrification (${\Delta}ORP<-10$) and nitrification (${\Delta}ORP<0$). The use of real-time control saved anywhere between 61 and 67 minutes at the anoxic(1) stage and 26 to 52 minutes at the oxic(1) stage. When the time saved from the anoxic(1) and oxic(1) was added to the anoxic(2) stage for the removal efficiency of TN and TP increased from 0.7 to 13.9% and 12 to 35 % respectively.

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