Effect of flow rate, draw solution concentration and temperature on the performance of TFC FO membrane, and the potential use of ro reject brine as a draw solution in FO–RO hybrid systems

Akther, N; Daer, S; Hasan, SW

Effect of flow rate, draw solution concentration and temperature on the performance of TFC FO membrane, and the potential use of ro reject brine as a draw solution in FO–RO hybrid systems

Akther, N

Daer, S Hasan, SW

Permalink

Publisher:: DESALINATION PUBL
Publication Type:: Journal Article
Citation:: Desalination and Water Treatment, 2018, 136, pp. 65-71
Issue Date:: 2018-12-01

Closed Access

	Filename	Description	Size
	Effect of flow rate, draw solution concentration and temperature on the performance of TFC FO membrane, and the potential use of RO reject brine as a draw solution in FO-RO hybrid systems.pdf	Accepted version	771.96 kB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Akther, N https://orcid.org/0000-0001-8706-9542
dc.contributor.author	Daer, S
dc.contributor.author	Hasan, SW
dc.date.accessioned	2020-11-11T08:26:26Z
dc.date.available	2020-11-11T08:26:26Z
dc.date.issued	2018-12-01
dc.identifier.citation	Desalination and Water Treatment, 2018, 136, pp. 65-71
dc.identifier.issn	1944-3994
dc.identifier.issn	1944-3986
dc.identifier.uri	http://hdl.handle.net/10453/143913
dc.description.abstract	© 2018 Desalination Publications. All rights reserved. The main objective of this research study was to investigate the effect of feed and draw solution flow rate, draw solution concentration (2.5–7.7 wt% NaCl) and draw solution temperature (23°C–60°C) on the performance of a commercial polyamide thin-film composite forward osmosis (FO) flat sheet membrane in the active-layer-facing-draw solution (AL-DS) membrane orientation. Increasing the feed and draw solution flow rate improved the membrane flux by mitigating concentration polarization effects on both sides of the membrane. The membrane flux also increased at higher draw solution concentration due to higher osmotic pressure. Additionally, it was found that increasing the draw solution temperature slightly improved the membrane flux but the temperature effect was negligible due to the severe effect of concentration polarization. It was observed from experimental results that the salt rejection was maintained above 98% at all operating conditions, and an optimal water flux of 11.4 L m–2 h–1 was reported at a flow rate of 48 mL min–1 with deionized water as feed and 7.7 wt% NaCl as draw solution at 40°C. The water flux across the membranes decreased when brine at 7.7 wt% NaCl was used as the draw solution and raw seawater as the feed solution in active-layer-facing-feed solution (AL-FS) membrane orientation because of concentration polarization effects and lower osmotic pressure. The results showed that the performance of FO membranes is influenced by the operating conditions. Therefore, optimizing these conditions is essential and can significantly improve the performance of FO membranes.
dc.language	English
dc.publisher	DESALINATION PUBL
dc.relation.ispartof	Desalination and Water Treatment
dc.relation.isbasedon	10.5004/dwt.2018.23195
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.title	Effect of flow rate, draw solution concentration and temperature on the performance of TFC FO membrane, and the potential use of ro reject brine as a draw solution in FO–RO hybrid systems
dc.type	Journal Article
utslib.citation.volume	136
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2020-11-11T08:26:22Z
pubs.publication-status	Published
pubs.volume	136

Abstract:

© 2018 Desalination Publications. All rights reserved. The main objective of this research study was to investigate the effect of feed and draw solution flow rate, draw solution concentration (2.5–7.7 wt% NaCl) and draw solution temperature (23°C–60°C) on the performance of a commercial polyamide thin-film composite forward osmosis (FO) flat sheet membrane in the active-layer-facing-draw solution (AL-DS) membrane orientation. Increasing the feed and draw solution flow rate improved the membrane flux by mitigating concentration polarization effects on both sides of the membrane. The membrane flux also increased at higher draw solution concentration due to higher osmotic pressure. Additionally, it was found that increasing the draw solution temperature slightly improved the membrane flux but the temperature effect was negligible due to the severe effect of concentration polarization. It was observed from experimental results that the salt rejection was maintained above 98% at all operating conditions, and an optimal water flux of 11.4 L m–2 h–1 was reported at a flow rate of 48 mL min–1 with deionized water as feed and 7.7 wt% NaCl as draw solution at 40°C. The water flux across the membranes decreased when brine at 7.7 wt% NaCl was used as the draw solution and raw seawater as the feed solution in active-layer-facing-feed solution (AL-FS) membrane orientation because of concentration polarization effects and lower osmotic pressure. The results showed that the performance of FO membranes is influenced by the operating conditions. Therefore, optimizing these conditions is essential and can significantly improve the performance of FO membranes.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/143913