Pilot-scale membrane capacitive deionisation for effective bromide removal and high water recovery in seawater desalination

Dorji, P; Kim, DI; Hong, S; Phuntsho, S; Shon, HK

Pilot-scale membrane capacitive deionisation for effective bromide removal and high water recovery in seawater desalination

Dorji, P

Kim, DI Hong, S Phuntsho, S

Shon, HK

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Desalination, 2020, 479
Issue Date:: 2020-04-01

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Field	Value	Language
dc.contributor.author	Dorji, P https://orcid.org/0000-0003-0973-7773
dc.contributor.author	Kim, DI
dc.contributor.author	Hong, S
dc.contributor.author	Phuntsho, S https://orcid.org/0000-0002-3917-3916
dc.contributor.author	Shon, HK
dc.date.accessioned	2021-03-28T01:26:12Z
dc.date.available	2021-03-28T01:26:12Z
dc.date.issued	2020-04-01
dc.identifier.citation	Desalination, 2020, 479
dc.identifier.issn	0011-9164
dc.identifier.issn	1873-4464
dc.identifier.uri	http://hdl.handle.net/10453/147562
dc.description.abstract	© 2020 Although seawater desalination is becoming an important technology for freshwater production, the presence of a high concentration of bromide in the seawater presents a major challenge. Bromide is one of the major inorganic precursors for the formation of disinfection by-products such as bromate, which is highly regulated due to its toxicity and carcinogenicity. Hence, a significant reduction of bromide ions is required prior to water disinfection. In Australia, all the desalination plants have to operate a two-stage reverse osmosis system to ensure effective bromide removal, which adds significant cost to the desalination system. In this study, a pilot-scale membrane capacitive deionisation (MCDI) was investigated as a potential alternative to the 2nd stage RO in seawater desalination. Moreover, strategies to enhance water recovery in MCDI was also carried out by using lower flow rates and shorter duration during the desorption stage. In order to reduce energy consumption in MCDI, a combined short-circuit and reverse polarity desorption is introduced. The results showed that MCDI can effectively remove bromide and dissolved salt at a much lower energy consumption compared with membrane process and that MCDI can be operated to achieve high water recovery without increasing the total energy consumption.
dc.language	English
dc.publisher	ELSEVIER
dc.relation.ispartof	Desalination
dc.relation.isbasedon	10.1016/j.desal.2020.114309
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Chemical Engineering
dc.title	Pilot-scale membrane capacitive deionisation for effective bromide removal and high water recovery in seawater desalination
dc.type	Journal Article
utslib.citation.volume	479
utslib.for	090404 Membrane and Separation Technologies
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
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
utslib.copyright.status	closed_access	*
dc.date.updated	2021-03-28T01:26:09Z
pubs.publication-status	Published
pubs.volume	479

Abstract:

© 2020 Although seawater desalination is becoming an important technology for freshwater production, the presence of a high concentration of bromide in the seawater presents a major challenge. Bromide is one of the major inorganic precursors for the formation of disinfection by-products such as bromate, which is highly regulated due to its toxicity and carcinogenicity. Hence, a significant reduction of bromide ions is required prior to water disinfection. In Australia, all the desalination plants have to operate a two-stage reverse osmosis system to ensure effective bromide removal, which adds significant cost to the desalination system. In this study, a pilot-scale membrane capacitive deionisation (MCDI) was investigated as a potential alternative to the 2nd stage RO in seawater desalination. Moreover, strategies to enhance water recovery in MCDI was also carried out by using lower flow rates and shorter duration during the desorption stage. In order to reduce energy consumption in MCDI, a combined short-circuit and reverse polarity desorption is introduced. The results showed that MCDI can effectively remove bromide and dissolved salt at a much lower energy consumption compared with membrane process and that MCDI can be operated to achieve high water recovery without increasing the total energy consumption.

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http://hdl.handle.net/10453/147562