Factors affecting flux performance of forward osmosis systems

The performance of a forward osmosis (FO) system may be characterised by the assessment parameters: FO–RO flux ratio (Jw/Jw(RO)), apparent FO water permeability (Jw/(πds − πml)), and the newly developed flux efficiency factor (Jw,ob/Jw,re). The former two parameters offer information on extent of in...

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Main Authors: Lay, Winson Chee Loong, Zhang, Jinsong, Tang, Chuyang Y., Wang, Rong, Liu, Yu, Fane, Anthony Gordon
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2013
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Online Access:https://hdl.handle.net/10356/101110
http://hdl.handle.net/10220/13674
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1011102020-03-07T11:45:54Z Factors affecting flux performance of forward osmosis systems Lay, Winson Chee Loong Zhang, Jinsong Tang, Chuyang Y. Wang, Rong Liu, Yu Fane, Anthony Gordon School of Civil and Environmental Engineering Singapore Membrane Technology Centre DRNTU::Engineering::Civil engineering::Water resources The performance of a forward osmosis (FO) system may be characterised by the assessment parameters: FO–RO flux ratio (Jw/Jw(RO)), apparent FO water permeability (Jw/(πds − πml)), and the newly developed flux efficiency factor (Jw,ob/Jw,re). The former two parameters offer information on extent of internal concentration polarisation and driving force utilisation, respectively. The Jw,ob/Jw,re factor has practical relevance, and reveals the inevitable trade-off between flux and recovery (φ) for a FO system. The derived Jw,ob/Jw,re factors corresponded well to experimental observations. High water permeability, low salt-to-water permeability ratio, and large mass transfer coefficient improve the performance of a FO system, but these may also be influenced by operational and fouling effects, such as draw solute transmission, fouling resistance and cake-enhanced concentration polarisation. It was shown that membrane properties also play a significant role in fouling behaviour. Fouling amelioration factors include aeration and osmotic backwash. A thin-film composite membrane showed potential for FO application with favourable intrinsic transport parameters. It was demonstrated that a FO system could achieve stable water production with both relatively high flux efficiency (Jw,ob/Jw,re = 0.8) and high recovery (φ = 95.8%), which attested to the technology potential. 2013-09-25T02:52:51Z 2019-12-06T20:33:30Z 2013-09-25T02:52:51Z 2019-12-06T20:33:30Z 2012 2012 Journal Article Lay, W. C., Zhang, J., Tang, C., Wang, R., Liu, Y., & Fane, A. G. (2012). Factors affecting flux performance of forward osmosis systems. Journal of Membrane Science, (394-395), 151-168. https://hdl.handle.net/10356/101110 http://hdl.handle.net/10220/13674 10.1016/j.memsci.2011.12.035 en Journal of membrane science
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering::Water resources
spellingShingle DRNTU::Engineering::Civil engineering::Water resources
Lay, Winson Chee Loong
Zhang, Jinsong
Tang, Chuyang Y.
Wang, Rong
Liu, Yu
Fane, Anthony Gordon
Factors affecting flux performance of forward osmosis systems
description The performance of a forward osmosis (FO) system may be characterised by the assessment parameters: FO–RO flux ratio (Jw/Jw(RO)), apparent FO water permeability (Jw/(πds − πml)), and the newly developed flux efficiency factor (Jw,ob/Jw,re). The former two parameters offer information on extent of internal concentration polarisation and driving force utilisation, respectively. The Jw,ob/Jw,re factor has practical relevance, and reveals the inevitable trade-off between flux and recovery (φ) for a FO system. The derived Jw,ob/Jw,re factors corresponded well to experimental observations. High water permeability, low salt-to-water permeability ratio, and large mass transfer coefficient improve the performance of a FO system, but these may also be influenced by operational and fouling effects, such as draw solute transmission, fouling resistance and cake-enhanced concentration polarisation. It was shown that membrane properties also play a significant role in fouling behaviour. Fouling amelioration factors include aeration and osmotic backwash. A thin-film composite membrane showed potential for FO application with favourable intrinsic transport parameters. It was demonstrated that a FO system could achieve stable water production with both relatively high flux efficiency (Jw,ob/Jw,re = 0.8) and high recovery (φ = 95.8%), which attested to the technology potential.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Lay, Winson Chee Loong
Zhang, Jinsong
Tang, Chuyang Y.
Wang, Rong
Liu, Yu
Fane, Anthony Gordon
format Article
author Lay, Winson Chee Loong
Zhang, Jinsong
Tang, Chuyang Y.
Wang, Rong
Liu, Yu
Fane, Anthony Gordon
author_sort Lay, Winson Chee Loong
title Factors affecting flux performance of forward osmosis systems
title_short Factors affecting flux performance of forward osmosis systems
title_full Factors affecting flux performance of forward osmosis systems
title_fullStr Factors affecting flux performance of forward osmosis systems
title_full_unstemmed Factors affecting flux performance of forward osmosis systems
title_sort factors affecting flux performance of forward osmosis systems
publishDate 2013
url https://hdl.handle.net/10356/101110
http://hdl.handle.net/10220/13674
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