Free ammonia pretreatment assists potassium ferrate to enhance the production of short-chain fatty acids from waste activated sludge: Performance, mechanisms and applications

Zhang, J; Sui, K; Wang, D; Liu, X; Li, L; Li, X; Xu, Q; Liu, Y; Wang, Q; Yang, Q

Free ammonia pretreatment assists potassium ferrate to enhance the production of short-chain fatty acids from waste activated sludge: Performance, mechanisms and applications

Zhang, J Sui, K Wang, D Liu, X Li, L Li, X Xu, Q Liu, Y

Wang, Q

Yang, Q

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Journal of Cleaner Production, 2021, 328, pp. 1-10
Issue Date:: 2021-12-15

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Field	Value	Language
dc.contributor.author	Zhang, J
dc.contributor.author	Sui, K
dc.contributor.author	Wang, D
dc.contributor.author	Liu, X
dc.contributor.author	Li, L
dc.contributor.author	Li, X
dc.contributor.author	Xu, Q
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.contributor.author	Yang, Q
dc.date.accessioned	2022-04-12T05:49:52Z
dc.date.available	2022-04-12T05:49:52Z
dc.date.issued	2021-12-15
dc.identifier.citation	Journal of Cleaner Production, 2021, 328, pp. 1-10
dc.identifier.issn	0959-6526
dc.identifier.issn	0959-6526
dc.identifier.uri	http://hdl.handle.net/10453/156128
dc.description.abstract	Anaerobic fermentation of waste activated sludge (WAS) is often limited by low disintegration rates of WAS and quick consumptions of short-chain fatty acids (SCFAs) by methanogens. This work proposed a novel, efficient and harmless pretreatment approach i.e., using potassium ferrate (PF) combined with free ammonia (FA), to enhance the disintegration of WAS and the accumulation of SCFAs from WAS anaerobic fermentation. It was found in this work, the best pretreating condition of WAS is 0.10 g PF/g VSS + 180 mg FA/L, under which the SCFAs consistence reached its maximum value (342.5 mg COD/g VSS), which was respectively 7.45-fold, 3.50-fold and 2.06-fold of that from the Blank, FA and PF reactor. Further in-depth mechanism study showed that the disintegration of WAS promoted and the biodegradability of fermentation broth enhanced under the PF + FA pretreatment condition. Moreover, the populations of fecal coliforms in WAS reduced significantly when PF + FA was adopted. Considering that FA could be produced in situ during the ammoniating process, the findings in this work promoted the utilization of PF-based pretreatment method in actual operations.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Journal of Cleaner Production
dc.relation.isbasedon	10.1016/j.jclepro.2021.129620
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0907 Environmental Engineering, 0910 Manufacturing Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Environmental Sciences
dc.title	Free ammonia pretreatment assists potassium ferrate to enhance the production of short-chain fatty acids from waste activated sludge: Performance, mechanisms and applications
dc.type	Journal Article
utslib.citation.volume	328
utslib.for	0907 Environmental Engineering
utslib.for	0910 Manufacturing Engineering
utslib.for	0915 Interdisciplinary 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	*
pubs.consider-herdc	false
utslib.copyright.embargo	2023-12-15T00:00:00+1000Z
dc.date.updated	2022-04-12T05:49:48Z
pubs.publication-status	Published
pubs.volume	328

Abstract:

Anaerobic fermentation of waste activated sludge (WAS) is often limited by low disintegration rates of WAS and quick consumptions of short-chain fatty acids (SCFAs) by methanogens. This work proposed a novel, efficient and harmless pretreatment approach i.e., using potassium ferrate (PF) combined with free ammonia (FA), to enhance the disintegration of WAS and the accumulation of SCFAs from WAS anaerobic fermentation. It was found in this work, the best pretreating condition of WAS is 0.10 g PF/g VSS + 180 mg FA/L, under which the SCFAs consistence reached its maximum value (342.5 mg COD/g VSS), which was respectively 7.45-fold, 3.50-fold and 2.06-fold of that from the Blank, FA and PF reactor. Further in-depth mechanism study showed that the disintegration of WAS promoted and the biodegradability of fermentation broth enhanced under the PF + FA pretreatment condition. Moreover, the populations of fecal coliforms in WAS reduced significantly when PF + FA was adopted. Considering that FA could be produced in situ during the ammoniating process, the findings in this work promoted the utilization of PF-based pretreatment method in actual operations.

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http://hdl.handle.net/10453/156128