Combined Effect of Free Nitrous Acid Pretreatment and Sodium Dodecylbenzene Sulfonate on Short-Chain Fatty Acid Production from Waste Activated Sludge.

Zhao, J; Liu, Y; Ni, B; Wang, Q; Wang, D; Yang, Q; Sun, Y; Zeng, G; Li, X

Combined Effect of Free Nitrous Acid Pretreatment and Sodium Dodecylbenzene Sulfonate on Short-Chain Fatty Acid Production from Waste Activated Sludge.

Zhao, J Liu, Y

Ni, B

Wang, Q

Wang, D Yang, Q Sun, Y Zeng, G Li, X

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Publisher:: NATURE PUBLISHING GROUP
Publication Type:: Journal Article
Citation:: Sci Rep, 2016, 6, (1), pp. 21622
Issue Date:: 2016-02-12

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Field	Value	Language
dc.contributor.author	Zhao, J
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961
dc.contributor.author	Ni, B https://orcid.org/0000-0002-1129-7837
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.contributor.author	Wang, D
dc.contributor.author	Yang, Q
dc.contributor.author	Sun, Y
dc.contributor.author	Zeng, G
dc.contributor.author	Li, X
dc.date.accessioned	2023-03-23T22:52:47Z
dc.date.available	2016-01-20
dc.date.available	2023-03-23T22:52:47Z
dc.date.issued	2016-02-12
dc.identifier.citation	Sci Rep, 2016, 6, (1), pp. 21622
dc.identifier.issn	2045-2322
dc.identifier.issn	2045-2322
dc.identifier.uri	http://hdl.handle.net/10453/168264
dc.description.abstract	Free nitrous acid (FNA) serving as a pretreatment is an effective approach to accelerate sludge disintegration. Also, sodium dodecylbenzene sulfonate (SDBS), a type of surfactants, has been determined at significant levels in sewage sludge, which thereby affects the characteristics of sludge. Both FNA pretreatment and sludge SDBS levels can affect short-chain fatty acid (SCFA) generation from sludge anaerobic fermentation. To date, however, the combined effect of FNA pretreatment and SDBS presence on SCFA production as well as the corresponding mechanisms have never been documented. This work therefore aims to provide such support. Experimental results showed that the combination of FNA and SDBS treatment not only improved SCFA accumulation but also shortened the fermentation time. The maximal SCFA accumulation of 334.5 mg chemical oxygen demand (COD)/g volatile suspended solids (VSS) was achieved at 1.54 mg FNA/L treatment and 0.02 g/g dry sludge, which was respectively 1.79-fold and 1.41-fold of that from FNA treatment and sludge containing SDBS alone. Mechanism investigations revealed that the combined FNA pretreatment and SDBS accelerated solubilization, hydrolysis, and acidification steps but inhibited the methanogenesis. All those observations were in agreement with SCFA enhancement.
dc.format	Electronic
dc.language	eng
dc.publisher	NATURE PUBLISHING GROUP
dc.relation.ispartof	Sci Rep
dc.relation.isbasedon	10.1038/srep21622
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.mesh	Benzenesulfonates
dc.subject.mesh	Dextrans
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Fermentation
dc.subject.mesh	Methane
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Serum Albumin
dc.subject.mesh	Sewage
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Methane
dc.subject.mesh	Benzenesulfonates
dc.subject.mesh	Dextrans
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Serum Albumin
dc.subject.mesh	Sewage
dc.subject.mesh	Fermentation
dc.subject.mesh	Benzenesulfonates
dc.subject.mesh	Dextrans
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Fermentation
dc.subject.mesh	Methane
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Serum Albumin
dc.subject.mesh	Sewage
dc.title	Combined Effect of Free Nitrous Acid Pretreatment and Sodium Dodecylbenzene Sulfonate on Short-Chain Fatty Acid Production from Waste Activated Sludge.
dc.type	Journal Article
utslib.citation.volume	6
utslib.location.activity	England
utslib.for	0904 Chemical 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	*
dc.date.updated	2023-03-23T22:52:44Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	6
utslib.citation.issue	1

Abstract:

Free nitrous acid (FNA) serving as a pretreatment is an effective approach to accelerate sludge disintegration. Also, sodium dodecylbenzene sulfonate (SDBS), a type of surfactants, has been determined at significant levels in sewage sludge, which thereby affects the characteristics of sludge. Both FNA pretreatment and sludge SDBS levels can affect short-chain fatty acid (SCFA) generation from sludge anaerobic fermentation. To date, however, the combined effect of FNA pretreatment and SDBS presence on SCFA production as well as the corresponding mechanisms have never been documented. This work therefore aims to provide such support. Experimental results showed that the combination of FNA and SDBS treatment not only improved SCFA accumulation but also shortened the fermentation time. The maximal SCFA accumulation of 334.5 mg chemical oxygen demand (COD)/g volatile suspended solids (VSS) was achieved at 1.54 mg FNA/L treatment and 0.02 g/g dry sludge, which was respectively 1.79-fold and 1.41-fold of that from FNA treatment and sludge containing SDBS alone. Mechanism investigations revealed that the combined FNA pretreatment and SDBS accelerated solubilization, hydrolysis, and acidification steps but inhibited the methanogenesis. All those observations were in agreement with SCFA enhancement.

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http://hdl.handle.net/10453/168264