Combined effect of air and mechanical scouring of membranes for fouling reduction in submerged membrane reactor

Pradhan, M; Vigneswaran, S; Kandasamy, J; Aim, RB

Combined effect of air and mechanical scouring of membranes for fouling reduction in submerged membrane reactor

Pradhan, M Vigneswaran, S

Kandasamy, J Aim, RB

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Publication Type:: Journal Article
Citation:: Desalination, 2012, 288 pp. 58 - 65
Issue Date:: 2012-03-01

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Field	Value	Language
dc.contributor.author	Pradhan, M	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.contributor.author	Kandasamy, J	en_US
dc.contributor.author	Aim, RB	en_US
dc.date.issued	2012-03-01	en_US
dc.identifier.citation	Desalination, 2012, 288 pp. 58 - 65	en_US
dc.identifier.issn	0011-9164	en_US
dc.identifier.uri	http://hdl.handle.net/10453/23071
dc.description.abstract	This study investigated the combined effect of air flow and use of granular support medium in suspension in a submerged membrane reactor to reduce membrane fouling. Lower membrane fouling and a slower rise in transmembrane pressure (TMP) were noticed when a higher air flow rate was used for membrane scouring. Further fouling reduction was achieved by adding a granular medium in the reactor. The results showed that in the absence of the granular medium, when air flow was tripled (from 600 to 1800L/h/m 2), the TMP development was decreased by 60%. TMP further dropped to 85% with the addition of granular medium (for the same air flow rate). The doubling of the air flow rate (from 600 to 1200L/h/m 2), without granular medium, led to a 32% reduction in TMP development at 10L/m 2 h. The same result was obtained at a lower air flow rate of 600L/h/m 2 with the granular medium. This result shows that the same reduction of TMP can be obtained by adding granular medium instead of doubling air flow rate. Therefore adding granular medium in the suspension (mechanical scouring) with air flow (air scouring) could be a sustainable alternative to applying high air flow in submerged membrane systems. © 2011 Elsevier B.V.	en_US
dc.relation.ispartof	Desalination	en_US
dc.relation.isbasedon	10.1016/j.desal.2011.12.010	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	Combined effect of air and mechanical scouring of membranes for fouling reduction in submerged membrane reactor	en_US
dc.type	Journal Article
utslib.citation.volume	288	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0907 Environmental 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
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	288	en_US

Abstract:

This study investigated the combined effect of air flow and use of granular support medium in suspension in a submerged membrane reactor to reduce membrane fouling. Lower membrane fouling and a slower rise in transmembrane pressure (TMP) were noticed when a higher air flow rate was used for membrane scouring. Further fouling reduction was achieved by adding a granular medium in the reactor. The results showed that in the absence of the granular medium, when air flow was tripled (from 600 to 1800L/h/m 2), the TMP development was decreased by 60%. TMP further dropped to 85% with the addition of granular medium (for the same air flow rate). The doubling of the air flow rate (from 600 to 1200L/h/m 2), without granular medium, led to a 32% reduction in TMP development at 10L/m 2 h. The same result was obtained at a lower air flow rate of 600L/h/m 2 with the granular medium. This result shows that the same reduction of TMP can be obtained by adding granular medium instead of doubling air flow rate. Therefore adding granular medium in the suspension (mechanical scouring) with air flow (air scouring) could be a sustainable alternative to applying high air flow in submerged membrane systems. © 2011 Elsevier B.V.

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http://hdl.handle.net/10453/23071