In-situ monitoring of membrane fouling migration and compression mechanism with improved ultraviolet technique in membrane bioreactors.

Cui, Z; Wang, X; Ngo, H; Zhu, G

In-situ monitoring of membrane fouling migration and compression mechanism with improved ultraviolet technique in membrane bioreactors.

Cui, Z Wang, X Ngo, H

Zhu, G

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Bioresour Technol, 2022, 347, pp. 126684
Issue Date:: 2022-03

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Field	Value	Language
dc.contributor.author	Cui, Z
dc.contributor.author	Wang, X
dc.contributor.author	Ngo, H https://orcid.org/0000-0002-0296-2866
dc.contributor.author	Zhu, G
dc.date.accessioned	2023-04-06T01:52:15Z
dc.date.available	2022-01-03
dc.date.available	2023-04-06T01:52:15Z
dc.date.issued	2022-03
dc.identifier.citation	Bioresour Technol, 2022, 347, pp. 126684
dc.identifier.issn	0960-8524
dc.identifier.issn	1873-2976
dc.identifier.uri	http://hdl.handle.net/10453/169260
dc.description.abstract	An improved UV spectrum in-situ monitoring system was applied to explore the membrane fouling behavior in membrane bioreactors (MBRs). The changes in absorbance curve illustrated that the formation of a stubborn fouling layer includes the migration and compression of membrane surface foulants. The initial flux negatively correlates with the migration degree (unevenness) of membrane fouling, while fiber length is positively correlated. In further experiments, ultrasonic thickness measurement excludes fouling layer compression caused by spatial collapse under external force. Moisture content measurement tests demonstrated that the moisture content changed from 52% to 31% after fouling layer compression, which confirmed that the fouling layer compression is mainly caused by the "high pressure dehydration effect". Finally, a membrane backwashing strategy based on fouling layer compression theory indicated that the backwashing process should be carried out at a stage where the accumulation of membrane fouling is constant but the fouling layer is not compressed.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation.ispartof	Bioresour Technol
dc.relation.isbasedon	10.1016/j.biortech.2022.126684
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Biotechnology
dc.subject.mesh	Bioreactors
dc.subject.mesh	Carbohydrates
dc.subject.mesh	Filtration
dc.subject.mesh	Membranes, Artificial
dc.subject.mesh	Physical Phenomena
dc.subject.mesh	Pressure
dc.subject.mesh	Carbohydrates
dc.subject.mesh	Membranes, Artificial
dc.subject.mesh	Filtration
dc.subject.mesh	Bioreactors
dc.subject.mesh	Pressure
dc.subject.mesh	Physical Phenomena
dc.subject.mesh	Bioreactors
dc.subject.mesh	Carbohydrates
dc.subject.mesh	Filtration
dc.subject.mesh	Membranes, Artificial
dc.subject.mesh	Physical Phenomena
dc.subject.mesh	Pressure
dc.title	In-situ monitoring of membrane fouling migration and compression mechanism with improved ultraviolet technique in membrane bioreactors.
dc.type	Journal Article
utslib.citation.volume	347
utslib.location.activity	England
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	2023-04-06T01:52:13Z
pubs.publication-status	Published
pubs.volume	347

Abstract:

An improved UV spectrum in-situ monitoring system was applied to explore the membrane fouling behavior in membrane bioreactors (MBRs). The changes in absorbance curve illustrated that the formation of a stubborn fouling layer includes the migration and compression of membrane surface foulants. The initial flux negatively correlates with the migration degree (unevenness) of membrane fouling, while fiber length is positively correlated. In further experiments, ultrasonic thickness measurement excludes fouling layer compression caused by spatial collapse under external force. Moisture content measurement tests demonstrated that the moisture content changed from 52% to 31% after fouling layer compression, which confirmed that the fouling layer compression is mainly caused by the "high pressure dehydration effect". Finally, a membrane backwashing strategy based on fouling layer compression theory indicated that the backwashing process should be carried out at a stage where the accumulation of membrane fouling is constant but the fouling layer is not compressed.

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http://hdl.handle.net/10453/169260