Insight into biofouling mechanism in biofiltration-facilitated gravity-driven membrane (GDM) system: Beneficial effects of pre-deposited adsorbents

Feng, J; Li, X; Yang, Y; Fan, X; Zhou, Z; Ren, J; Tan, X; Li, H

Insight into biofouling mechanism in biofiltration-facilitated gravity-driven membrane (GDM) system: Beneficial effects of pre-deposited adsorbents

Feng, J Li, X Yang, Y Fan, X Zhou, Z Ren, J Tan, X Li, H

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Journal of Membrane Science, 2022, 662, pp. 121017
Issue Date:: 2022-10-15

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Field	Value	Language
dc.contributor.author	Feng, J
dc.contributor.author	Li, X
dc.contributor.author	Yang, Y
dc.contributor.author	Fan, X
dc.contributor.author	Zhou, Z
dc.contributor.author	Ren, J
dc.contributor.author	Tan, X
dc.contributor.author	Li, H
dc.date.accessioned	2023-04-18T03:48:00Z
dc.date.available	2023-04-18T03:48:00Z
dc.date.issued	2022-10-15
dc.identifier.citation	Journal of Membrane Science, 2022, 662, pp. 121017
dc.identifier.issn	0376-7388
dc.identifier.issn	1873-3123
dc.identifier.uri	http://hdl.handle.net/10453/169921
dc.description.abstract	The membrane fouling triggered by biofouling layer is the critical factor limiting the application of biofiltration-facilitated gravity-driven membrane (GDM) system in decentralized drinking water treatment. Powdered activated carbon (PAC) and alumina (AA) were used to mitigate membrane fouling by pre-deposition. Pre-deposited PAC and AA improved the stable flux of the biofiltration-facilitated GDM systems, increasing by 9.6% and 17.0%, respectively. The removal of dissolved organic carbon, UV254 and protein-like material was sequentially enhanced by pre-deposition of PAC and AA, respectively. Pre-deposited AA performed better than pre-deposition of PAC in restricting the adhesion of soluble microbial products to the membrane. After pre-deposition of PAC and AA, the porosities of the biofouling layers increased by 0.78% and 2.51%, and the protein/polysaccharide ratio in extracellular polymeric substances (EPS) decreased from 111.8% to 53.4% and 39.8%, respectively. The protein in tightly bound EPS showed a significant positive (p < 0.05) relationship with the total membrane resistance and genus Acidovorax. Zoogloea was the core genus among the bacterial communities related to EPS production. Overall, pre-deposition of PAC and AA can be a simple and effective strategy to alleviate membrane fouling in biofiltration-facilitated GDM.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Journal of Membrane Science
dc.relation.isbasedon	10.1016/j.memsci.2022.121017
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Chemical Engineering
dc.title	Insight into biofouling mechanism in biofiltration-facilitated gravity-driven membrane (GDM) system: Beneficial effects of pre-deposited adsorbents
dc.type	Journal Article
utslib.citation.volume	662
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
utslib.copyright.status	closed_access	*
dc.date.updated	2023-04-18T03:47:59Z
pubs.publication-status	Published
pubs.volume	662

Abstract:

The membrane fouling triggered by biofouling layer is the critical factor limiting the application of biofiltration-facilitated gravity-driven membrane (GDM) system in decentralized drinking water treatment. Powdered activated carbon (PAC) and alumina (AA) were used to mitigate membrane fouling by pre-deposition. Pre-deposited PAC and AA improved the stable flux of the biofiltration-facilitated GDM systems, increasing by 9.6% and 17.0%, respectively. The removal of dissolved organic carbon, UV254 and protein-like material was sequentially enhanced by pre-deposition of PAC and AA, respectively. Pre-deposited AA performed better than pre-deposition of PAC in restricting the adhesion of soluble microbial products to the membrane. After pre-deposition of PAC and AA, the porosities of the biofouling layers increased by 0.78% and 2.51%, and the protein/polysaccharide ratio in extracellular polymeric substances (EPS) decreased from 111.8% to 53.4% and 39.8%, respectively. The protein in tightly bound EPS showed a significant positive (p < 0.05) relationship with the total membrane resistance and genus Acidovorax. Zoogloea was the core genus among the bacterial communities related to EPS production. Overall, pre-deposition of PAC and AA can be a simple and effective strategy to alleviate membrane fouling in biofiltration-facilitated GDM.

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http://hdl.handle.net/10453/169921