• Title/Summary/Keyword: reverse osmosis membrane

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Effect of Salt Concentration and Temperature in Synthetic Dyestuff Wastewater Treatment using Plate and Frame Membrane Module (평판형 막모듈을 이용한 합성염료 폐수처리에 있어서 염농도 및 온도의 영향)

  • Kim, Sun-Il;Lee, Bong-Woo;Yun, Young-Jae
    • Journal of Environmental Science International
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    • v.7 no.2
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    • pp.209-216
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    • 1998
  • Nanofiltration[NF45] and reverse osmosis membrane(HR98PP) separation treatment of dyestuff wastewater was carried out In order to separate relatively pure water from synthetic dyestuff wastewater, which consists of reactive dye, acid dye, basic dye, direct dye, and disperse dye. The experiments were performed by using the plate and frame membrane module. In the nanofiltration and reverse osmosis membrane separation, When the NaCl concentration was 0.1, 5.0, and 20.091, retention was 63.0, 46.0, 0.9%, respectively. When permeate flux was 125.0, 67.5, and 45.0 L/$m^2$ h, the osmotic pressure increased with Increasing the NaCl concentration. Permeate flux of two membranes Increased as temperature Increased due to segmental movement of polymer of the membrane and the rejection rate of dyestuff was decreased gradually. It was found that the rejection rate was about 95% in the nanofiltratlon, while the reverse osmosis membrane showed a high rejection rate of 99% under all temperature and pressures conditions.

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Factors related to Performance of Reverse Osmosis Membrane in Seawater Desalination Process (해수담수화 공정에서 역삼투막의 거동에 영향을 주는 요인)

  • Park, Jun-Young;Hong, Sung-Ho;Kim, Ji-Hoon;Jeong, Woo-Won;Nam, Jong-Woo;Kim, Young-Hoon;Lee, Chang-Ha;Kim, Hyung-Soo
    • Journal of Korean Society of Water and Wastewater
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    • v.25 no.2
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    • pp.171-176
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    • 2011
  • Organic matters that comprise a tiny part of seawater generally occur over 50% of membrane fouling in Reverse Osmosis Process. This study evaluates Foundation efficiency of reverse osmosis membranes under brackish and seawater conditions and resistance of organic fouling. Moreover, analyzing the membrane surface through roughness, contact angle and zeta potential results in roughness and contact angle are proportional to flux decline rate (FDR), yet FDR has high value when zeta potential is low level. Furthermore, with various membrane fouling of different raw water conditions, the flux tends to improve when pH value is high and raw water which is complex with organic and cation pollutes membrane faster than organic separated raw water condition.