Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Effect of Foulant Characteristics on Membrane Fouling Index

오염물질의 특성이 막오염 지수에 미치는 영향

  • 박찬혁 (고려대학교 공과대학 사회환경시스템공학과) ;
  • 김하나 (고려대학교 공과대학 사회환경시스템공학과) ;
  • 홍승관 (고려대학교 공과대학 사회환경시스템공학과)
  • Received : 2005.09.05
  • Accepted : 2005.12.13
  • Published : 2005.12.15
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Abstract

This study was performed to investigate the effect of foulant characteristics on Membrane fouling index such as Silt Density Index (SDI) and Modified Fouling Index (MFI). A linear relationship was found relating the fouling index (both SDI and MFI) on particle concentration, but fouling index values were nonlinearly (exponentially) with increasing organic concentration. When organic matter was the primary cause of fouling, the MFI was not accurately predicted due to internal fouling such as pore adsorption. The fouling index was determined mainly by particle characteristics when both particle and organic coexisted in the feed water. This observation was attributed to lessening of organic pore adsorption by particle cake layer formed on the membrane surface. Bench-scale actual fouling experiments demonstrated that permeate flux declines much faster with feed water containing particles than organic matters although fouling potential predicted by SDI values were identical, indicating that the accurate prediction of fouling potential requires the development of fouling index reflecting different foulant characteristics.

Keywords

Acknowledgement

Grant : 상업용 FRM(Fouling Resistant membrane)의 비교 평가 및 Fouling Mechanism 규명

Supported by : (주)새한 CSM

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