상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제17권4호
  • /
  • Pages.550-558
  • /
  • 2003
  • /
  • 1225-7672(pISSN)
  • /
  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
권호 표지

반응조 형상이 상향류 혐기성 슬러지 소화에 미치는 영향

Effects of Reactor Configuration on Upflow Anaerobic Sludge Digestion

  • 김대영 (서울대학교 지구환경시스템 공학부) ;
  • 김희준 (서울대학교 지구환경시스템 공학부) ;
  • 박기영 (한국과학기술원 환경.공정연구부) ;
  • 최영균 (성균관대학교 토목환경공학과) ;
  • 정태학 (서울대학교 지구환경시스템 공학부)
  • 투고 : 2003.05.23
  • 심사 : 2003.07.02
  • 발행 : 2003.08.15
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초록

Digestion of primary sludge was conducted to evaluate the effects of reactor configuration using UAD, CUAD, TPAD, and semi-continuos CSTR. Highest VSS reduction and gas production were obtained in CUAD at all HRT. More efficient digestion was accomplished in upflow digesters compared to TPAD and CSTR. Higher thickening of solids in reactor and longer solids retention were main reasons for the enhanced digestion in CUAD and UAD. Performance based on the SRT of CUAD was nearly identical to that of UAD. However, those of TPAD and CSTR were lower than that of CUAD. Particulate and soluble organics in upflow reactors were well adsorbed due to secreted extracellular polymeric substances from the sludge granules. These might result in close proximity of microorganisms and substrates and enhanced hydrolysis. Additionally, diverse anaerobic microorganisms and neutral pH in upflow reactor could induce more activity of hydrolytic enzymes and sludge granules might offer lower thermodynamic energy state. While, excessive mixing in CSTR could break conglomerates of enzymes and substrates into fine particles, which resulted in lowered hydrolysis. Low pH level in acid fermenter of TPAD lowered hydrolysis of the particulate substrates.

키워드

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