Effect of Cross-flow Velocity on the Critical Flux of Ceramic Membrane Filtration as a Pre-treatment for Seawater Desalination

doi:10.1016/S1004-9541(13)60470-X

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (4): 341-347.DOI: 10.1016/S1004-9541(13)60470-X

• 分离科学与工程 • 下一篇

Effect of Cross-flow Velocity on the Critical Flux of Ceramic Membrane Filtration as a Pre-treatment for Seawater Desalination

崔朝亮¹, 彭文博², 范益群¹, 邢卫红¹, 徐南平¹

1 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China;
2 Jiangsu Jiuwu High-Tech Co., Ltd, Nanjing 210061, China

收稿日期:2012-01-31 修回日期:2012-12-25 出版日期:2013-04-28 发布日期:2013-04-26
通讯作者: FAN Yiqun
基金资助:
Supported by the National High Technology Research and Development of China (2007AA030303).

Effect of Cross-flow Velocity on the Critical Flux of Ceramic Membrane Filtration as a Pre-treatment for Seawater Desalination

CUI Zhaoliang¹, PENG Wenbo², FAN Yiqun¹, XING Weihong¹, XU Nanping ¹

1 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China;
2 Jiangsu Jiuwu High-Tech Co., Ltd, Nanjing 210061, China

Received:2012-01-31 Revised:2012-12-25 Online:2013-04-28 Published:2013-04-26
Supported by:
Supported by the National High Technology Research and Development of China (2007AA030303).

摘要/Abstract

摘要： Pre-treatment, which supplies a stable, high-quality feed for reverse osmosis (RO) membranes, is a critical step for successful operation in a seawater reverse osmosis plant. In this study, ceramic membrane systems were employed as pre-treatment for seawater desalination. A laboratory experiment was performed to investigate the effect of the cross-flow velocity on the critical flux and consequently to optimize the permeate flux. Then a pilot test was performed to investigate the long-term performance. The result shows that there is no significant effect of the cross-flow velocity on the critical flux when the cross-flow velocity varies in laminar flow region only or in turbulent flow region only, but the effect is distinct when the cross-flow velocity varies in the transition region. The membrane fouling is slight at the permeate flux of 150 L穖^-2穐^-1 and the system is stable, producing a high-quality feed (the turbidity and silt density index are less than 0.1 NTU and 3.0, respectively) for RO to run for 2922.4 h without chemical cleaning. Thus the ceramic membranes are suitable to filtrate seawater as the pre-treatment for RO.

关键词: ceramic membrane, seawater desalination, pre-treatment, critical flux

Abstract: Pre-treatment, which supplies a stable, high-quality feed for reverse osmosis (RO) membranes, is a critical step for successful operation in a seawater reverse osmosis plant. In this study, ceramic membrane systems were employed as pre-treatment for seawater desalination. A laboratory experiment was performed to investigate the effect of the cross-flow velocity on the critical flux and consequently to optimize the permeate flux. Then a pilot test was performed to investigate the long-term performance. The result shows that there is no significant effect of the cross-flow velocity on the critical flux when the cross-flow velocity varies in laminar flow region only or in turbulent flow region only, but the effect is distinct when the cross-flow velocity varies in the transition region. The membrane fouling is slight at the permeate flux of 150 L穖^-2穐^-1 and the system is stable, producing a high-quality feed (the turbidity and silt density index are less than 0.1 NTU and 3.0, respectively) for RO to run for 2922.4 h without chemical cleaning. Thus the ceramic membranes are suitable to filtrate seawater as the pre-treatment for RO.

Key words: ceramic membrane, seawater desalination, pre-treatment, critical flux

崔朝亮, 彭文博, 范益群, 邢卫红, 徐南平. Effect of Cross-flow Velocity on the Critical Flux of Ceramic Membrane Filtration as a Pre-treatment for Seawater Desalination[J]. Chinese Journal of Chemical Engineering, 2013, 21(4): 341-347.

CUI Zhaoliang, PENG Wenbo, FAN Yiqun, XING Weihong, XU Nanping . Effect of Cross-flow Velocity on the Critical Flux of Ceramic Membrane Filtration as a Pre-treatment for Seawater Desalination[J]. Chin.J.Chem.Eng., 2013, 21(4): 341-347.

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Effect of Cross-flow Velocity on the Critical Flux of Ceramic Membrane Filtration as a Pre-treatment for Seawater Desalination

Effect of Cross-flow Velocity on the Critical Flux of Ceramic Membrane Filtration as a Pre-treatment for Seawater Desalination

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