상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제32권5호
  • /
  • Pages.453-460
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  • 2018
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  • 1225-7672(pISSN)
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  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
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수산화나트륨의 노출 강도가 PVDF 분리막 성능에 미치는 영향

Effects of exposure intensity of sodium hydroxide on PVDF membrane performance

  • 이용수 (한양대학교, 건설환경공학과) ;
  • 강하영 ((주)제일엔지니어링종합건축사사무소, 상하수도사업부) ;
  • 김우하 ((주)제일엔지니어링종합건축사사무소, 상하수도사업부) ;
  • 이창규 (한양대학교, 건설환경공학과) ;
  • 김종오 (한양대학교, 건설환경공학과)
  • Lee, Yong-Soo (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Kang, Ha-Young (Water Supply & Sewerage Business Div., Cheil Engineering co., Ltd.) ;
  • Kim, Woo-Ha (Water Supply & Sewerage Business Div., Cheil Engineering co., Ltd.) ;
  • Lee, Chang-Kyu (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Kim, Jong-Oh (Department of Civil and Environmental Engineering, Hanyang University)
  • 투고 : 2018.03.12
  • 심사 : 2018.10.05
  • 발행 : 2018.10.15
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초록

The impact of sodium hydroxide, which is one of chemicals of clean in place (CIP) for removing membrane fouling, on the PVDF membrane is reviewed with respect to physical/chemical structural change, the permeability affected therefrom. Based on the cleaning concentration applied in membrane water treatment facilities, 10% of accumulated defluorination was confirmed up to 166g.hr/L which reflects the exposure time. However, membrane resistance was confirmed to be reduced by about 10%. Through FT-IR and EDS analysis, reduction of F and change of are confirmed as factors that affect the permeability of membrane. Membrane resistance, which affects permeability, is affected by loss of additives for hydrophilicity, rather than defluorination of PVDF material. Therefore, in order to check membrane degradation degree, an accelerated test by NaOH was carried out, loss of additives was confirmed, and then PVDF inherent characteristic was observed.

키워드

참고문헌

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