Feasibility of enhancing short-chain fatty acids production from waste activated sludge after free ammonia pretreatment: Role and significance of rhamnolipid

Xu, Q; Liu, X; Fu, Y; Li, Y; Wang, D; Wang, Q; Liu, Y; An, H; Zhao, J; Wu, Y; Li, X; Yang, Q; Zeng, G

Feasibility of enhancing short-chain fatty acids production from waste activated sludge after free ammonia pretreatment: Role and significance of rhamnolipid

Xu, Q Liu, X Fu, Y Li, Y Wang, D Wang, Q

Liu, Y

An, H Zhao, J Wu, Y Li, X Yang, Q Zeng, G

Permalink

Publication Type:: Journal Article
Citation:: Bioresource Technology, 2018, 267 pp. 141 - 148
Issue Date:: 2018-11-01

Closed Access

	Filename	Description	Size
	feasibility.pdf	Published Version	2.04 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Xu, Q	en_US
dc.contributor.author	Liu, X	en_US
dc.contributor.author	Fu, Y	en_US
dc.contributor.author	Li, Y	en_US
dc.contributor.author	Wang, D	en_US
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331	en_US
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961	en_US
dc.contributor.author	An, H	en_US
dc.contributor.author	Zhao, J	en_US
dc.contributor.author	Wu, Y	en_US
dc.contributor.author	Li, X	en_US
dc.contributor.author	Yang, Q	en_US
dc.contributor.author	Zeng, G	en_US
dc.date.available	2018-07-05	en_US
dc.date.issued	2018-11-01	en_US
dc.identifier.citation	Bioresource Technology, 2018, 267 pp. 141 - 148	en_US
dc.identifier.issn	0960-8524	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131852
dc.description.abstract	© 2018 Elsevier Ltd This study reported a new, renewable and high-efficient strategy for anaerobic fermentation, i.e., using free ammonia (FA) to pretreat waste activated sludge (WAS) for 1 d and then combining with rhamnolipid (RL), by which the short-chain fatty acids (SCFA) production was remarkably improved. Experimental results showed the maximal SCFA production of 324.7 ± 13.9 mg COD/g VSS was achieved at 62.6 mg FA/L pretreatment combined with 0.04 g RL/g TSS, which was respectively 5.95-fold, 1.63-fold and 1.41-fold of that from control, FA pretreatment and RL pretreatment. Mechanism investigations revealed that FA + RL enhanced sludge solubilization and hydrolysis, providing more organics for subsequent SCFA production. It was also found that the combined method inhibited acidogenesis and methanogenesis, but the inhibition to methanogenesis was much severer than that to acidogenesis. Finally, the feasibility of NH4+-N and PO3−4-P, released in fermentation liquor, being recovered as magnesium ammonium phosphate (MAP) was confirmed.	en_US
dc.relation.ispartof	Bioresource Technology	en_US
dc.relation.isbasedon	10.1016/j.biortech.2018.07.018	en_US
dc.subject.classification	Biotechnology	en_US
dc.subject.mesh	Ammonia	en_US
dc.subject.mesh	Glycolipids	en_US
dc.subject.mesh	Fatty Acids, Volatile	en_US
dc.subject.mesh	Sewage	en_US
dc.subject.mesh	Fermentation	en_US
dc.subject.mesh	Hydrogen-Ion Concentration	en_US
dc.title	Feasibility of enhancing short-chain fatty acids production from waste activated sludge after free ammonia pretreatment: Role and significance of rhamnolipid	en_US
dc.type	Journal Article
utslib.citation.volume	267	en_US
utslib.for	1003 Industrial Biotechnology	en_US
utslib.for	1002 Environmental Biotechnology	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	267	en_US

Abstract:

© 2018 Elsevier Ltd This study reported a new, renewable and high-efficient strategy for anaerobic fermentation, i.e., using free ammonia (FA) to pretreat waste activated sludge (WAS) for 1 d and then combining with rhamnolipid (RL), by which the short-chain fatty acids (SCFA) production was remarkably improved. Experimental results showed the maximal SCFA production of 324.7 ± 13.9 mg COD/g VSS was achieved at 62.6 mg FA/L pretreatment combined with 0.04 g RL/g TSS, which was respectively 5.95-fold, 1.63-fold and 1.41-fold of that from control, FA pretreatment and RL pretreatment. Mechanism investigations revealed that FA + RL enhanced sludge solubilization and hydrolysis, providing more organics for subsequent SCFA production. It was also found that the combined method inhibited acidogenesis and methanogenesis, but the inhibition to methanogenesis was much severer than that to acidogenesis. Finally, the feasibility of NH4+-N and PO3−4-P, released in fermentation liquor, being recovered as magnesium ammonium phosphate (MAP) was confirmed.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/131852