Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Characteristics of Membrane Fouling and Nitrification in Nitrifying Membrane Bioreactor

Nitrifying membrane bioreactor에서의 막 오염 및 질산화 특성

  • Lim, Kyoung-Jo (School of Chemical Engineering and Bioengineering, University of Ulsan) ;
  • Hong, Soon-Ho (School of Chemical Engineering and Bioengineering, University of Ulsan) ;
  • Yoo, Ik-Keun (School of Chemical Engineering and Bioengineering, University of Ulsan)
  • 임경조 (울산대학교 생명화학공학부) ;
  • 홍순호 (울산대학교 생명화학공학부) ;
  • 유익근 (울산대학교 생명화학공학부)
  • Received : 2011.02.10
  • Accepted : 2011.08.11
  • Published : 2011.09.30
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Abstract

The purpose of this study is to find the operational characteristics of nitrifier-dominated membrane bioreactor (MBR), which has been extensively studied for organic removal, especially in terms of nitrite ($NO_2$-N) build-up and membrane fouling. Membrane fouling is one of the important factor which determines the economics of MBR system. The characteristics of membrane fouling was monitored in terms of the fouling indices such as sludge volume index (SVI), the concentration of total organic carbon (TOC) and extracellular polymeric substances (EPS) in a membrane permeate or sludge extract, the absorbance of supernatant at 260 nm. Most of index values except for protein concentration in EPS had a close relation with the increase of suction pressure and SVI value. Nitrifying MBR was superior to the conventional organic-oxidizing MBR in terms of membrane fouling since the fouling index value of nitrifying MBR was lower than that of BOD-oxidizing MBR.

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