Evaluation of ethanol as draw solute for forward osmosis (FO) process of highly saline (waste)water

Kim, J; Lim, J; Hong, S

Evaluation of ethanol as draw solute for forward osmosis (FO) process of highly saline (waste)water

Kim, J

Lim, J Hong, S

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Publication Type:: Journal Article
Citation:: Desalination, 2019, 456 pp. 23 - 31
Issue Date:: 2019-04-15

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Field	Value	Language
dc.contributor.author	Kim, J https://orcid.org/0000-0002-6500-514X	en_US
dc.contributor.author	Lim, J	en_US
dc.contributor.author	Hong, S	en_US
dc.date.issued	2019-04-15	en_US
dc.identifier.citation	Desalination, 2019, 456 pp. 23 - 31	en_US
dc.identifier.issn	0011-9164	en_US
dc.identifier.uri	http://hdl.handle.net/10453/135244
dc.description.abstract	© 2019 Elsevier B.V. In the study, ethanol was evaluated for its potential as a draw solution in forward osmosis (FO) in terms of performance for treating highly saline (waste)waters and energy requirements for regeneration. When compared to NH4HCO3 (a thermolytic draw solution) ethanol exhibited significantly higher osmotic pressure and significantly easier regeneration. In FO experiments using commercial TFC FO membranes, the ethanol draw solution exhibited a water flux comparable to that of NH4HCO3 at equivalent osmotic pressure albeit a relatively high reverse solute flux (RSF) due to its volatility. The modeling prediction based on membrane transport properties obtained from the FO experiments revealed the critical role of the ethanol permeability of the membrane in the overall FO performance, thereby suggesting the necessity of a higher water-ethanol selective membranes for the extensive application of the ethanol draw solution for the treatment of highly saline wastewater. Easy-regeneration of the ethanol draw solution was also demonstrated based on experimental results obtained using laboratory scale vacuum distillation at room temperature and exergy analysis of the integrated system. The results indicated that the regeneration process required an estimated 8.8 kWh/m3, thereby supporting the feasibility of ethanol as a potent draw solution for FO application of highly saline waters.	en_US
dc.relation.ispartof	Desalination	en_US
dc.relation.isbasedon	10.1016/j.desal.2019.01.012	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	Evaluation of ethanol as draw solute for forward osmosis (FO) process of highly saline (waste)water	en_US
dc.type	Journal Article
utslib.citation.volume	456	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/Students
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	456	en_US

Abstract:

© 2019 Elsevier B.V. In the study, ethanol was evaluated for its potential as a draw solution in forward osmosis (FO) in terms of performance for treating highly saline (waste)waters and energy requirements for regeneration. When compared to NH4HCO3 (a thermolytic draw solution) ethanol exhibited significantly higher osmotic pressure and significantly easier regeneration. In FO experiments using commercial TFC FO membranes, the ethanol draw solution exhibited a water flux comparable to that of NH4HCO3 at equivalent osmotic pressure albeit a relatively high reverse solute flux (RSF) due to its volatility. The modeling prediction based on membrane transport properties obtained from the FO experiments revealed the critical role of the ethanol permeability of the membrane in the overall FO performance, thereby suggesting the necessity of a higher water-ethanol selective membranes for the extensive application of the ethanol draw solution for the treatment of highly saline wastewater. Easy-regeneration of the ethanol draw solution was also demonstrated based on experimental results obtained using laboratory scale vacuum distillation at room temperature and exergy analysis of the integrated system. The results indicated that the regeneration process required an estimated 8.8 kWh/m3, thereby supporting the feasibility of ethanol as a potent draw solution for FO application of highly saline waters.

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http://hdl.handle.net/10453/135244