Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Chemically enhanced steam cleaning for the control of ceramic membrane fouling caused by manganese and humic acid

망간과 휴믹산에 의한 세라믹 막 오염의 제어를 위한 약품 스팀세정의 적용

  • An, Sun-A (Department of Environmental Engineering and Energy, Myongji University) ;
  • Park, Cheol-Gyu (Department of Environmental Engineering and Energy, Myongji University) ;
  • Lee, Jin-San (Department of Environmental Engineering and Energy, Myongji University) ;
  • Kim, Han-Seung (Department of Environmental Engineering and Energy, Myongji University)
  • 안선아 (명지대학교 환경에너지공학과) ;
  • 박철규 (명지대학교 환경에너지공학과) ;
  • 이진산 (명지대학교 환경에너지공학과) ;
  • 김한승 (명지대학교 환경에너지공학과)
  • Received : 2021.11.05
  • Accepted : 2021.11.26
  • Published : 2021.12.15
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Abstract

In this study, chemically enhanced steam cleaning(CESC) was applied as a novel and efficient method for the control of organic and inorganic fouling in ceramic membrane filtration. The constant filtration regression model and the resistance in series model(RISM) were used to investigate the membrane fouling mechanisms. For total filtration, the coefficient of determination(R2) with an approximate value of 1 was obtained in the intermediate blocking model which is considered as the dominant contamination mechanism. In addition, most of the coefficient values showed similar values and this means that the complex fouling was formed during the filtration period. In the RISM, R c/R f increased about 4.37 times in chemically enhanced steam cleaning compared to physical backwashing, which implies that the internal fouling resistance was converted to cake layer resistance, so that the membrane fouling hardly to be removed by physical backwashing could be efficiently removed by chemically enhanced steam cleaning. The results of flux recovery rate showed that high-temperature steam may loosen the structure of the membrane cake layer due to the increase in diffusivity and solubility of chemicals and finally enhance the cleaning effect. As a consequence, it is expected that chemically enhanced steam cleaning can drastically improve the efficiency of membrane filtration process when the characteristics of the foulant are identified.

Keywords

Acknowledgement

본 연구는 한국환경산업기술원 "수열 활용확대 기술 및 환경적합성 기술개발사업(G232020120072)"의 지원으로 수행되었습니다.

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