Novel stepwise pH control strategy to improve short chain fatty acid production from sludge anaerobic fermentation

Zhao, J; Wang, D; Liu, Y; Ngo, HH; Guo, W; Yang, Q; Li, X

Novel stepwise pH control strategy to improve short chain fatty acid production from sludge anaerobic fermentation

Zhao, J Wang, D Liu, Y

Ngo, HH

Guo, W

Yang, Q Li, X

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Publication Type:: Journal Article
Citation:: Bioresource Technology, 2018, 249 pp. 431 - 438
Issue Date:: 2018-02-01

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Field	Value	Language
dc.contributor.author	Zhao, J	en_US
dc.contributor.author	Wang, D	en_US
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858	en_US
dc.contributor.author	Yang, Q	en_US
dc.contributor.author	Li, X	en_US
dc.date.available	2020-05-25T19:27:21Z
dc.date.issued	2018-02-01	en_US
dc.identifier.citation	Bioresource Technology, 2018, 249 pp. 431 - 438	en_US
dc.identifier.issn	0960-8524	en_US
dc.identifier.uri	http://hdl.handle.net/10453/122139
dc.description.abstract	© 2017 Elsevier Ltd This study reports an innovative strategy known as stepwise pH fermentation, developed to enhance the production of short chain volatile fatty acids (SCFA) from waste activated sludge (WAS) anaerobic fermentation. Experimental results confirmed the optimal pH for WAS disruption and acidification was 11 and 9, respectively, and corresponding optimal time was, respectively, 5 d and 2 d. In this scenario, the optimal SCFA yield was 2356 mg chemical oxygen demand (COD)/L, which was much higher than that derived from alkaline fermentation system. Investigation of the mechanism indicated that pH 11 could accelerate the disruption of WAS and inhibit the activities of methanogens; furthermore, pH 9 was beneficial to the activity of acid-producing bacteria, resulting in more SCFA production. Stepwise pH fermentation integrated with sodium chloride (NaCl) present in WAS had synergistic impacts on WAS anaerobic fermentation.	en_US
dc.relation.ispartof	Bioresource Technology	en_US
dc.relation.isbasedon	10.1016/j.biortech.2017.10.050	en_US
dc.subject.classification	Biotechnology	en_US
dc.subject.mesh	Bacteria	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	Novel stepwise pH control strategy to improve short chain fatty acid production from sludge anaerobic fermentation	en_US
dc.type	Journal Article
utslib.citation.volume	249	en_US
utslib.for	0904 Chemical Engineering	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	open_access
pubs.publication-status	Published	en_US
pubs.volume	249	en_US

Abstract:

© 2017 Elsevier Ltd This study reports an innovative strategy known as stepwise pH fermentation, developed to enhance the production of short chain volatile fatty acids (SCFA) from waste activated sludge (WAS) anaerobic fermentation. Experimental results confirmed the optimal pH for WAS disruption and acidification was 11 and 9, respectively, and corresponding optimal time was, respectively, 5 d and 2 d. In this scenario, the optimal SCFA yield was 2356 mg chemical oxygen demand (COD)/L, which was much higher than that derived from alkaline fermentation system. Investigation of the mechanism indicated that pH 11 could accelerate the disruption of WAS and inhibit the activities of methanogens; furthermore, pH 9 was beneficial to the activity of acid-producing bacteria, resulting in more SCFA production. Stepwise pH fermentation integrated with sodium chloride (NaCl) present in WAS had synergistic impacts on WAS anaerobic fermentation.

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http://hdl.handle.net/10453/122139