한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제26권1호
  • /
  • Pages.81-88
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  • 2010
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  • 2289-0971(pISSN)
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  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
권호 표지

고부하 유기성 폐수처리를 위한 분리막 결합형 순산소 고효율 포기장치의 총괄 산소전달효율 평가

Comparison of Overall Oxygen Transfer Coefficient in the Membrane Coupled High Performance Reactor for a High Organic Loading Wastewater Treatment

  • 강범희 (공주대학교 건설환경공학부) ;
  • 임경호 (공주대학교 건설환경공학부) ;
  • 이상민 (공주대학교 환경공학과)
  • Kang, Bum-Hee (Department of Civil & Environmental Engineering, Kongju National University) ;
  • Lim, Kyeong-Ho (Department of Civil & Environmental Engineering, Kongju National University) ;
  • Lee, Sang-Min (Department of Environmental Engineering, Kongju National University)
  • 투고 : 2009.09.08
  • 심사 : 2009.10.28
  • 발행 : 2010.01.30
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초록

This study was conducted to find the capability of comparison of overall oxygen transfer coefficient in the membrane coupled high performance reactor (MPHCR) in treating high organic loading wastewater. Effluent quality had been analyzed while the influent organic loading rate was changed from 2 to $7kg\;COD/m^3{\cdot}day$. The oxygen transfer coefficients had been investigated using two-phase nozzle for operating variables which were internal circulation flowrate (5~8 L/min), air flow rate (0.0125~0.2 L/min), liquid temperature ($10{\sim}20^{\circ}C$), and pure-oxygen flow rate (0.0125~0.2 L/min). The overall oxygen transfer coefficient was increased with flowrate of internal circulation and air and high temperature. Especially, internal circulation flow rate showed distinct effect on overall oxygen transfer coefficient due to an increase of gas holdup and air-liquid contract area by two-phase nozzle. In the high range of organic loading rate from 4 to $7kg\;COD/m^3{\cdot}day$, the removable efficiency of COD was 91%. Conventional activated sludge process usually treat organic loading from 0.32 to $0.64kg\;COD/m^3{\cdot}day$ however, the MPHCR can treat 10 to 20 times higher if it would be compared to the conventional activated sludge process. Foaming problem often happened and caused biomass wash out of the reactor, therefore, the foaming should be controlled for the enhanced operation.

키워드

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