• Title/Summary/Keyword: two stage hybrid system

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Increase of Recovery Ratio by Two Stage Membrane Process (the Pressurized PVDF Membrane Followed by Submerged PE Membrane) (PVDF 가압식과 PE 침지식 분리막을 결합한 2단 막여과 공정의 성능검토 및 회수율 증대 방안 연구)

  • Kim, Junhyeon;Mun, Baeksu;Jang, Hong-Jin;Kim, Jinho;Kim, Byungseok
    • Membrane Journal
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    • v.23 no.1
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    • pp.45-53
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    • 2013
  • Membrane filtration processes are increasingly popular for drinking water treatment that requires high quality of water. But pre-treatment system (Coagulation/Flocculation/Sedimentation) requires increased footprint and installation cost. In addition, 5~10% of the concentrate are formed. In this study, the pressurized PVDF membrane (ECONITY Co., Ltd.) system was tested with surface water (Han River, South Korea) without pre-treatment. As a result, permeate flux was operated between 1 m/d and 2.4 m/d (at $25^{\circ}C$) without chemical cleaning for one year and membrane permeate turbidity was maintained stably under 0.05 NTU regardless of raw water turbidity. And we studied application of concetrate treatment of pressurized PVDF membrane by submerged PE membrane (ECONITY Co., Ltd.). As a result, we increased recovery of total treatment process to 99.5%.