Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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A Study on Biological Wastewater Treatment using the Combination of Anaerobic and Two Intermittent Aeration Tanks Operated Alternately: A Pilot-scale Study

혐기 및 2단 교호(交互) 간헐포기조를 이용한 하수고도처리에 관한 연구: 파일럿 규모의 실험결과를 중심으로

  • Choi, Yong-Su (Water Environment & Remediation Center, Korea Institute of Science & Technology) ;
  • Hong, Seok-Won (Water Environment & Remediation Center, Korea Institute of Science & Technology) ;
  • Kwon, Gihan (Water Environment & Remediation Center, Korea Institute of Science & Technology)
  • 최용수 (한국과학기술연구원, 수질환경 및 복원연구센터) ;
  • 홍석원 (한국과학기술연구원, 수질환경 및 복원연구센터) ;
  • 권기한 (한국과학기술연구원, 수질환경 및 복원연구센터)
  • Received : 2004.03.09
  • Accepted : 2004.03.30
  • Published : 2004.05.30
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Abstract

The performance of a newly designed wastewater treatment process equipped with an anaerobic and two intermittent aeration tanks operated alternately was investigated. During the experimental period, several types of cyclic operating schedules with different aeration and non aeration time were examined for the optimization. At all modes, the removals of organic matter and SS were highly achieved. With respect to T-N removal, however, the cycle length for aeration on/off affected the efficiencies. At the optimal operating mode, the ORP bending point indicating the disappearance of nitrate was observed. Considering the influent wastewater characteristics and cyclic operating schedules, it can be suggested that T-P removal is much more BOD/T-P ratio and/or its load dependant rather than the aeration on/off time. The results obtained from pilot-scale test showed the competitive advantage of this alternating process through an omission of nitrate recycle and operational flexibility against influent load variations when comparing with other continuous flow processes.

Keywords

References

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