Biogas sparging to control fouling and enhance resource recovery from anaerobically digested sludge centrate by forward osmosis

Vu, MT; Nguyen, LN; Hasan Johir, MA; Zhang, X; Nghiem, LD; Elimelech, M

Biogas sparging to control fouling and enhance resource recovery from anaerobically digested sludge centrate by forward osmosis

Vu, MT Nguyen, LN Hasan Johir, MA Zhang, X Nghiem, LD Elimelech, M

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Journal of Membrane Science, 2021, 625
Issue Date:: 2021-05-01

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Field	Value	Language
dc.contributor.author	Vu, MT
dc.contributor.author	Nguyen, LN
dc.contributor.author	Hasan Johir, MA
dc.contributor.author	Zhang, X
dc.contributor.author	Nghiem, LD
dc.contributor.author	Elimelech, M
dc.date.accessioned	2021-11-16T22:56:44Z
dc.date.available	2021-11-16T22:56:44Z
dc.date.issued	2021-05-01
dc.identifier.citation	Journal of Membrane Science, 2021, 625
dc.identifier.issn	0376-7388
dc.identifier.issn	1873-3123
dc.identifier.uri	http://hdl.handle.net/10453/151650
dc.description.abstract	This study demonstrates the proof-of-concept of biogas sparging to control membrane fouling during sludge centrate pre-concentration by forward osmosis (FO). Sludge centrate sparging by biogas reduced membrane fouling (measured by water flux decline) and filtration time by two and eight times, respectively, compared to FO operation without biogas sparging at the same water recovery of 60%. In addition, the water flux was almost fully recovered by physical flushing when biogas sparging was applied. Biogas sparging also resulted in a significant improvement in the enrichment of organic, ammonia, and phosphate to close to the theoretical value based on mass balance calculation. In other words, organic matter and nutrients were retained in the bulk solution for subsequent recovery. Fouling mitigation and nutrient enrichment improvement by biogas sparging could be attributed to carbonate buffering to maintain a near neutral pH for preventing calcium phosphate precipitation on the membrane surface and ammonia volatilisation.
dc.language	English
dc.publisher	ELSEVIER
dc.relation	http://purl.org/au-research/grants/arc/IH170100009
dc.relation.ispartof	Journal of Membrane Science
dc.relation.isbasedon	10.1016/j.memsci.2021.119176
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Chemical Engineering
dc.title	Biogas sparging to control fouling and enhance resource recovery from anaerobically digested sludge centrate by forward osmosis
dc.type	Journal Article
utslib.citation.volume	625
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	open_access	*
utslib.copyright.embargo	2023-05-31T00:00:00+1000Z
dc.date.updated	2021-11-16T22:56:42Z
pubs.publication-status	Published
pubs.volume	625

Abstract:

This study demonstrates the proof-of-concept of biogas sparging to control membrane fouling during sludge centrate pre-concentration by forward osmosis (FO). Sludge centrate sparging by biogas reduced membrane fouling (measured by water flux decline) and filtration time by two and eight times, respectively, compared to FO operation without biogas sparging at the same water recovery of 60%. In addition, the water flux was almost fully recovered by physical flushing when biogas sparging was applied. Biogas sparging also resulted in a significant improvement in the enrichment of organic, ammonia, and phosphate to close to the theoretical value based on mass balance calculation. In other words, organic matter and nutrients were retained in the bulk solution for subsequent recovery. Fouling mitigation and nutrient enrichment improvement by biogas sparging could be attributed to carbonate buffering to maintain a near neutral pH for preventing calcium phosphate precipitation on the membrane surface and ammonia volatilisation.

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http://hdl.handle.net/10453/151650