Elucidation of physicochemical scaling mechanisms in membrane distillation (MD): Implication to the control of inorganic fouling

Kim, J; Kim, HW; Tijing, LD; Shon, HK; Hong, S

Elucidation of physicochemical scaling mechanisms in membrane distillation (MD): Implication to the control of inorganic fouling

Kim, J Kim, HW Tijing, LD Shon, HK Hong, S

Permalink

Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Desalination, 2022, 527
Issue Date:: 2022-04-01

Closed Access

	Filename	Description	Size
	Elucidation of physicochemical scaling mechanisms in membrane distillation (MD) Implication to the control of inorganic fouling.pdf	Published version	3.8 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, J
dc.contributor.author	Kim, HW
dc.contributor.author	Tijing, LD
dc.contributor.author	Shon, HK
dc.contributor.author	Hong, S
dc.date.accessioned	2023-03-23T04:45:42Z
dc.date.available	2023-03-23T04:45:42Z
dc.date.issued	2022-04-01
dc.identifier.citation	Desalination, 2022, 527
dc.identifier.issn	0011-9164
dc.identifier.issn	1873-4464
dc.identifier.uri	http://hdl.handle.net/10453/168211
dc.description.abstract	This study elucidates the physicochemical mechanisms of monovalent and multivalent inorganic scaling and suggests an optimal cleaning strategy for efficient membrane distillation (MD) operation. Three distinct stages of MD inorganic scaling were clearly identified by i) experimentally measuring transient flux, ii) rejection behavior resulted from the deposition of a scale, and iii) SEM-EDX analysis of the membrane. During stage 1, no scale was found over the membrane surface showing almost stable water flux and permeate conductivity. In stage 2, the onset of inorganic scaling resulted in the deposition of scaling on some parts of the membrane surface, partially covering the membrane pores, which lead to a sudden reduction in the water flux despite a steady solute rejection. However, as scaling expands into the pore in final stage 3, the permeate conductivity increased, indicating a reduction in rejection. Then, the pores were completely blocked, and the water flux reached almost zero. To simulate this scaling formation more fundamentally, the saturation index (SI) and supersaturation (S) concepts were introduced. The type and timing of scaling were successfully predicted by the SI value, and the amount of scaling was accurately estimated by the S value. Moreover, through the analysis of this physicochemical mechanism of inorganic scaling, an optimal cleaning strategy for sustainable MD operation was proposed.
dc.language	English
dc.publisher	ELSEVIER
dc.relation.ispartof	Desalination
dc.relation.isbasedon	10.1016/j.desal.2022.115573
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Chemical Engineering
dc.title	Elucidation of physicochemical scaling mechanisms in membrane distillation (MD): Implication to the control of inorganic fouling
dc.type	Journal Article
utslib.citation.volume	527
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	2023-03-23T04:45:41Z
pubs.publication-status	Published
pubs.volume	527

Abstract:

This study elucidates the physicochemical mechanisms of monovalent and multivalent inorganic scaling and suggests an optimal cleaning strategy for efficient membrane distillation (MD) operation. Three distinct stages of MD inorganic scaling were clearly identified by i) experimentally measuring transient flux, ii) rejection behavior resulted from the deposition of a scale, and iii) SEM-EDX analysis of the membrane. During stage 1, no scale was found over the membrane surface showing almost stable water flux and permeate conductivity. In stage 2, the onset of inorganic scaling resulted in the deposition of scaling on some parts of the membrane surface, partially covering the membrane pores, which lead to a sudden reduction in the water flux despite a steady solute rejection. However, as scaling expands into the pore in final stage 3, the permeate conductivity increased, indicating a reduction in rejection. Then, the pores were completely blocked, and the water flux reached almost zero. To simulate this scaling formation more fundamentally, the saturation index (SI) and supersaturation (S) concepts were introduced. The type and timing of scaling were successfully predicted by the SI value, and the amount of scaling was accurately estimated by the S value. Moreover, through the analysis of this physicochemical mechanism of inorganic scaling, an optimal cleaning strategy for sustainable MD operation was proposed.

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

http://hdl.handle.net/10453/168211