Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Respirometry for COD Fractionation of Wastewater

미생물 호흡률 분석에 의한 하수의 유기물 분류

  • 최영균 (성균관대학교 토목환경공학과) ;
  • 김규동 (서울대학교 지구환경시스템공학부) ;
  • 김희준 (서울대학교 지구환경시스템공학부) ;
  • 김윤중 (서울대학교 지구환경시스템공학부) ;
  • 정태학 (서울대학교 지구환경시스템공학부)
  • Received : 2003.04.02
  • Accepted : 2003.06.24
  • Published : 2003.08.15
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Abstract

COD fractionation of primary settled municipal wastewater was conducted by respirometry. RBCOD (Readily Biodegradable COD) fraction was analyzed to be 21% of influent TCOD. However, SCOD fraction, analyzed by physical separation using $0.45{\mu}m$ membrane filter, was about 31% of TCOD. Therefore, 10% of soluble inert COD was comprised in TCOD. It means that kinetic analysis of activated sludge system was impossible because serious error would be occurred if SCOD was used as a biodegradable soluble component instead of RBCOD estimated from respirometry. In this study, RBCOD fraction of raw wastewater could be analyzed by respirometry within the error range of 57%. In addition, SBCOD (Slowly Biodegradable COD) content could be determined by kinetic simulation of the experimental results. SBCOD showed about 2-fold higher fraction (38% of TCOD) as compared with RBCOD.

Keywords

References

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