Enhanced hydrogen accumulation from waste activated sludge by combining ultrasonic and free nitrous acid pretreatment: Performance, mechanism, and implication

Niu, Q; Xu, Q; Wang, Y; Wang, D; Liu, X; Liu, Y; Wang, Q; Ni, BJ; Yang, Q; Li, X; Li, H

Enhanced hydrogen accumulation from waste activated sludge by combining ultrasonic and free nitrous acid pretreatment: Performance, mechanism, and implication

Niu, Q Xu, Q Wang, Y Wang, D Liu, X Liu, Y

Wang, Q

Ni, BJ

Yang, Q Li, X Li, H

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Publication Type:: Journal Article
Citation:: Bioresource Technology, 2019, 285
Issue Date:: 2019-08-01

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Field	Value	Language
dc.contributor.author	Niu, Q	en_US
dc.contributor.author	Xu, Q	en_US
dc.contributor.author	Wang, Y	en_US
dc.contributor.author	Wang, D	en_US
dc.contributor.author	Liu, X	en_US
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961	en_US
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331	en_US
dc.contributor.author	Ni, BJ https://orcid.org/0000-0002-1129-7837	en_US
dc.contributor.author	Yang, Q	en_US
dc.contributor.author	Li, X	en_US
dc.contributor.author	Li, H	en_US
dc.date.available	2019-04-17	en_US
dc.date.issued	2019-08-01	en_US
dc.identifier.citation	Bioresource Technology, 2019, 285	en_US
dc.identifier.issn	0960-8524	en_US
dc.identifier.uri	http://hdl.handle.net/10453/135227
dc.description.abstract	© 2019 Elsevier Ltd This study presents a novel and effective method, i.e., adding nitrite into acidic fermentations after ultrasonic (US) pretreatment to form free nitrous acid (FNA), to further enhance hydrogen yield. Experimental results showed that when 180 mg/L nitrite was added into the US (2 W/mL, 15 min) pretreated waste activated sludge (WAS), the maximal hydrogen yield of 24.81 ± 1.24 mL/g VSS (volatile suspended solids) was obtained under acidic fermentation (1.0 mg/L FNA was initially formed under this condition), which was 2.21-folds (or 1.36-folds) of that from US pretreatment (or FNA treatment) alone. This combination approach caused a positive synergy on sludge disintegration and enhanced the transformation of the released organics from non-biodegradable to biodegradable. Further study showed that the inhibiting effect of this combination method on hydrogen consuming microorganism was severer. Considering its pollution free, this combination strategy is an attractive technology for hydrogen recovery from WAS.	en_US
dc.relation.ispartof	Bioresource Technology	en_US
dc.relation.isbasedon	10.1016/j.biortech.2019.121363	en_US
dc.subject.classification	Biotechnology	en_US
dc.subject.mesh	Nitrous Acid	en_US
dc.subject.mesh	Hydrogen	en_US
dc.subject.mesh	Sewage	en_US
dc.subject.mesh	Fermentation	en_US
dc.subject.mesh	Ultrasonics	en_US
dc.title	Enhanced hydrogen accumulation from waste activated sludge by combining ultrasonic and free nitrous acid pretreatment: Performance, mechanism, and implication	en_US
dc.type	Journal Article
utslib.citation.volume	285	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	285	en_US

Abstract:

© 2019 Elsevier Ltd This study presents a novel and effective method, i.e., adding nitrite into acidic fermentations after ultrasonic (US) pretreatment to form free nitrous acid (FNA), to further enhance hydrogen yield. Experimental results showed that when 180 mg/L nitrite was added into the US (2 W/mL, 15 min) pretreated waste activated sludge (WAS), the maximal hydrogen yield of 24.81 ± 1.24 mL/g VSS (volatile suspended solids) was obtained under acidic fermentation (1.0 mg/L FNA was initially formed under this condition), which was 2.21-folds (or 1.36-folds) of that from US pretreatment (or FNA treatment) alone. This combination approach caused a positive synergy on sludge disintegration and enhanced the transformation of the released organics from non-biodegradable to biodegradable. Further study showed that the inhibiting effect of this combination method on hydrogen consuming microorganism was severer. Considering its pollution free, this combination strategy is an attractive technology for hydrogen recovery from WAS.

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http://hdl.handle.net/10453/135227