Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Evaluation of membrane fouling characteristics due to manganese and chemical cleaning efficiency in microfiltration membrane process

막여과 정수처리공정에서 망간에 의한 막오염 특성 및 화학세정효율 평가

  • Kang, Joon-Seok (Department of Environmental Engineering and Energy, Myongji University) ;
  • Park, Seogyeong (Department of Environmental Engineering and Energy, Myongji University) ;
  • Song, Jiyoung (Department of Environmental Engineering and Energy, Myongji University) ;
  • Jeong, Ahyoung (Department of Environmental Engineering and Energy, Myongji University) ;
  • Lee, Jeong-Jun (Department of Environmental Engineering and Energy, Myongji University) ;
  • Kim, Han-Seung (Department of Environmental Engineering and Energy, Myongji University)
  • 강준석 (명지대학교 환경에너지공학과) ;
  • 박서경 (명지대학교 환경에너지공학과) ;
  • 송지영 (명지대학교 환경에너지공학과) ;
  • 정아영 (명지대학교 환경에너지공학과) ;
  • 이정준 (명지대학교 환경에너지공학과) ;
  • 김한승 (명지대학교 환경에너지공학과)
  • Received : 2017.11.07
  • Accepted : 2017.11.28
  • Published : 2017.12.15
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Abstract

In water treatment process using microfiltration membranes, manganese is a substance that causes inorganic membrane fouling. As a result of analysis on the operation data taken from I WTP(Water Treatment Plant), it was confirmed that the increase of TMP was very severe during the period of manganese inflow. The membrane fouling fastened the increase of TMP and shortened the service time of filtration or the cleaning cycle. The TMP of the membrane increased to the maximum of $2.13kgf/cm^2$, but it was recovered to the initial level ($0.17kgf/cm^2$) by the 1st acid cleaning step. It was obvious that the main membrane fouling contaminants are due to inorganic substances. As a result of the analysis on the chemical waste, the concentrations of aluminum(146-164 mg/L) and manganese(110-126 mg/L) were very high. It is considered that aluminum was due to the residual unreacted during coagulation step as a pretreatment process. And manganese is thought to be due to the adsorption on the membrane surface as an adsorbate in feed water component during filtration step. For the efficient maintenance of the membrane filtration facilities, optimization of chemical concentration and CIP conditions is very important when finding the abnormal level of influent including foulants such as manganese.

Keywords

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