Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Respirometry for the Assessment of Organics Biodegradability in Municipal Wastewater: I. Respirometry

호흡률법에 의한 하수의 생분해 특성 평가: I. 호흡률법

  • 김동한 (서원대학교 환경건설정보학과) ;
  • 김희준 (서울대학교 지구환경시스템공학부) ;
  • 정태학 (서울대학교 지구환경시스템공학부)
  • Received : 2003.08.30
  • Accepted : 2003.12.30
  • Published : 2004.02.15
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Abstract

Organics may be divided into biodegradable and nonbiodegradable fractions on the basis of biodegradability. Biodegradable organics may be subdivided into readily and slowly biodegradable fractions. As this biodegradability of organics in municipal wastewater has a great influence on the efficiency of a biological nutrient removal process, it has been assessed by respirometry. The respirometer, which consisted of a respiration chamber and a respiration cell, was used to measure the respiration rate of biomass utilizing the readily biodegradable organics. The readily biodegradable organics are about 10% of the COD in municipal wastewater. The adequate ratio of wastewater to sludge volume and the concentration of sludge are required in measuring the respiration rate due to the readily biodegradable organics. By using a biochemical oxygen demand test, the slowly biodegradable organics including biomass are estimated about 66% of COD. The soluble inert organics are about 11% of COD. On the basis of mass balance, the particulate inert organics are estimated about 13% of COD.

Keywords

References

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