Organic fouling mechanisms in forward osmosis membrane process under elevated feed and draw solution temperatures

Kim, Y; Lee, S; Shon, HK; Hong, S

Organic fouling mechanisms in forward osmosis membrane process under elevated feed and draw solution temperatures

Kim, Y

Lee, S Shon, HK

Hong, S

Permalink

Publication Type:: Journal Article
Citation:: Desalination, 2015, 355 pp. 169 - 177
Issue Date:: 2015-01-01

Closed Access

	Filename	Description	Size
	Organic fouling mechanisms in forward osmosis membrane process under elevated feed and draw solution temperaturesThis item is a favouritemain.pdf	Published Version	1.02 MB	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	Kim, Y https://orcid.org/0000-0002-4101-4885	en_US
dc.contributor.author	Lee, S	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.contributor.author	Hong, S	en_US
dc.date.issued	2015-01-01	en_US
dc.identifier.citation	Desalination, 2015, 355 pp. 169 - 177	en_US
dc.identifier.issn	0011-9164	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131973
dc.description.abstract	© 2014. Organic fouling mechanisms in forward osmosis (FO) were systematically investigated at varying feed and draw temperatures. The effect of temperature variation on FO performance was first examined without foulants. When draw temperature increased, internal concentration polarization (ICP) decreased, which caused water flux to increase. Water flux was also improved with increasing feed temperature due to water permeability increased by decreased viscosity. Thus it can be deduced that water flux enhancement was induced by combined effects of reduced ICP and enhanced water permeability. A series of fouling experiments was then elaborately designed to fundamentally elucidate organic fouling mechanisms. Results demonstrated that organic fouling was significantly influenced by convective and diffusive organic transports induced by increasing temperature. Faster flux decline was observed with increasing draw temperature, primarily due to increased permeation drag. When increasing feed temperature, FO membrane was less fouled, attributing to enhanced organic back diffusion from membrane surface as well as increased organic solubility. Furthermore, fouling became more severe above certain critical flux at which organic convection by permeation drag dominated fouling mechanism as seen with escalating both temperatures simultaneously. Findings from this study can be utilized beneficially when FO temperature may be varied and needs to be optimized.	en_US
dc.relation.ispartof	Desalination	en_US
dc.relation.isbasedon	10.1016/j.desal.2014.10.041	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	Organic fouling mechanisms in forward osmosis membrane process under elevated feed and draw solution temperatures	en_US
dc.type	Journal Article
utslib.citation.volume	355	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	355	en_US

Abstract:

© 2014. Organic fouling mechanisms in forward osmosis (FO) were systematically investigated at varying feed and draw temperatures. The effect of temperature variation on FO performance was first examined without foulants. When draw temperature increased, internal concentration polarization (ICP) decreased, which caused water flux to increase. Water flux was also improved with increasing feed temperature due to water permeability increased by decreased viscosity. Thus it can be deduced that water flux enhancement was induced by combined effects of reduced ICP and enhanced water permeability. A series of fouling experiments was then elaborately designed to fundamentally elucidate organic fouling mechanisms. Results demonstrated that organic fouling was significantly influenced by convective and diffusive organic transports induced by increasing temperature. Faster flux decline was observed with increasing draw temperature, primarily due to increased permeation drag. When increasing feed temperature, FO membrane was less fouled, attributing to enhanced organic back diffusion from membrane surface as well as increased organic solubility. Furthermore, fouling became more severe above certain critical flux at which organic convection by permeation drag dominated fouling mechanism as seen with escalating both temperatures simultaneously. Findings from this study can be utilized beneficially when FO temperature may be varied and needs to be optimized.

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

http://hdl.handle.net/10453/131973