Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Comparison of Biological Nutrient Removal Efficiencies on the Different Types of Membrane

분리막 종류에 따른 하수의 생물학적 고도처리 효율 비교 연구

  • Park, Jong-Bu (Research Institute of Technology, Hanwha E&C Corp) ;
  • Shin, Kyung-Sook (Research Institute of Technology, Hanwha E&C Corp) ;
  • Hur, Hyung-Woo (Research Institute of Technology, Hanwha E&C Corp) ;
  • Kang, Ho (Department of Environmetal Engineering, Chungnam University)
  • 박종부 ((주)한화건설 기술연구소) ;
  • 신경숙 ((주)한화건설 기술연구소) ;
  • 허형우 ((주)한화건설 기술연구소) ;
  • 강호 (충남대학교 환경공학과)
  • Received : 2011.02.23
  • Accepted : 2011.04.05
  • Published : 2011.05.30
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Abstract

This study was performed to investigate the characteristics of nutrient removal of municipal wastewater in the membrane bioreactor system with the different types of membrane. Membrane bioreactor consists of three reactors such as two intermittent anaerobic and the submerged membrane aerobic reactor with flat sheet and hollow fiber membrane, respectively. The removal efficiencies of $COD_{cr}$, BOD, SS, TN and TP on the flat sheet membrane bioreactor were 94.3%, 99.0%, 99.9%, 70.3% and 63.1%, respectively. In addition, The removal efficiencies of $COD_{cr}$, BOD, SS, TN and TP on the hollow fiber membrane bioreactor were 94.0%, 99.3%, 99.9%, 69.9% and 66.9%, respectively. The estimated true biomass yield, specific denitrification rate (SDNR), specific nitrification rate (SNR) and phosphorus removal content on the flat sheet membrane bioreactor were $0.33kgVSS/kgBOD{\cdot}d$, $0.043mgNO_3-N/mgVSS{\cdot}d$, $0.031mgNH_4-N/mgVSS{\cdot}d$, and 0.144 kgP/d, respectively. In addition, the estimated true biomass yield, specific denitrification rate (SDNR), specific nitrification rate (SNR) and phosphorus removal content on the hollow fiber membrane bioreactor were $0.30kgVSS/kgBOD{\cdot}d$, $0.067mgNO_3-N/mgVSS{\cdot}d$, $0.028mgNH_4-N/mgVSS{\cdot}d$, and 0.121 kgP/d, respectively. There was little difference between the flat sheet and hollow fiber on the nutrient removal efficiencies except SNR and SDNR. These differences between them were caused by the air demand to prevent the membrane fouling. The flux and oxygen demand for air scouring were $19.0L/m^2/hr$ and $2.28m^3/min$ for the flat sheet membrane, and $20.7L/m^2/hr$ and $1.77m^3/min$ for the hollow fiber membrane on an average.

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