지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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In a desalination technology using RO membranes, chemical cleaning makes damage for membrane surface and membrane life be shortened. In this research cleaning technology using direct osmosis (DO) was introduced to apply it under the condition of high pH and high concentration of feed. When the high concentration of feed is injected to the concentrate side after release of operating pressure, then backward flow occurred from treated water toward concentrated for osmotic pressure. This flow reduces fouling on the membrane surface. Namely, flux of DO was monitored under pH 3, 5, 10 and 12 conditions at feed concentrations of NaCl 40,000 mg/L, 120,000 mg/L and 160,000 mg/L. As a result, DO flux in pH 12 increased about 21% than pH 3. DO cleaning was performed under the concentrate NaCl 160,000 mg/L of pH 12 during 20 minutes. Three kinds of synthetic feed water were used as concentrates. They consisted of organic, inorganic and seawater; chemicals of SiO2 (200 mg/L), humic acid (50 mg/L) sodium alginate (50 mg/L) and seawater. As a result, fluxes were recovered to 17% in organic fouling, 15% in inorganic fouling and 14% of seawater fouling after cleaning using DO under the condition of concentrate NaCl 160,000 mg/L of pH 12.
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등록된 정보가 없습니다.
참고문헌 (11)
참고문헌 신청
오혜진 / 2010 / 역삼투막 공정에서 SiO2와 CaSO4에 대한 세정 특성분석
메나함엘리메리 / 201002 / Organic fouling of forward osmosis membranes: Fouling reversibility and cleaning without chemical reagents / JOURNAL OF MEMBRANE SCIENCE 348(1-2):337~345
Baoxia Mi. / 2008 / Chemical and physical aspects of organic fouling of forward osmosis membranes / Journal of membrane science 320:292~302
E. S. Lee / 2010 / Membrane characterization by dynamic hysteresis
Elizabeth M. Van Wagner / 2009 / Effect of crossflow testing conditions, including feed pH and continuous feed filtration on commercial reverse osmosis membrane performance / Journal of MembraneScience 345:97~109
메나함엘리메리 / 201002 / Organic fouling of forward osmosis membranes: Fouling reversibility and cleaning without chemical reagents / JOURNAL OF MEMBRANE SCIENCE 348(1-2):337~345
Baoxia Mi. / 2008 / Chemical and physical aspects of organic fouling of forward osmosis membranes / Journal of membrane science 320:292~302
E. S. Lee / 2010 / Membrane characterization by dynamic hysteresis
Elizabeth M. Van Wagner / 2009 / Effect of crossflow testing conditions, including feed pH and continuous feed filtration on commercial reverse osmosis membrane performance / Journal of MembraneScience 345:97~109
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