Zero valent iron significantly enhances methane production from waste activated sludge by improving biochemical methane potential rather than hydrolysis rate.

Liu, Y; Wang, Q; Zhang, Y; Ni, B-J

Zero valent iron significantly enhances methane production from waste activated sludge by improving biochemical methane potential rather than hydrolysis rate.

Liu, Y

Wang, Q

Zhang, Y Ni, B-J

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Publisher:: NATURE PUBLISHING GROUP
Publication Type:: Journal Article
Citation:: Sci Rep, 2015, 5, (1), pp. 8263
Issue Date:: 2015-02-05

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Field	Value	Language
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	Zhang, Y
dc.contributor.author	Ni, B-J
dc.date.accessioned	2023-03-23T23:05:30Z
dc.date.available	2015-01-14
dc.date.available	2023-03-23T23:05:30Z
dc.date.issued	2015-02-05
dc.identifier.citation	Sci Rep, 2015, 5, (1), pp. 8263
dc.identifier.issn	2045-2322
dc.identifier.issn	2045-2322
dc.identifier.uri	http://hdl.handle.net/10453/168276
dc.description.abstract	Anaerobic digestion has been widely applied for waste activated sludge (WAS) treatment. However, methane production from anaerobic digestion of WAS is usually limited by the slow hydrolysis rate and/or poor biochemical methane potential of WAS. This work systematically studied the effects of three different types of zero valent iron (i.e., iron powder, clean scrap and rusty scrap) on methane production from WAS in anaerobic digestion, by using both experimental and mathematical approaches. The results demonstrated that both the clean and the rusty iron scrap were more effective than the iron powder for improving methane production from WAS. Model-based analysis showed that ZVI addition significantly enhanced methane production from WAS through improving the biochemical methane potential of WAS rather than its hydrolysis rate. Economic analysis indicated that the ZVI-based technology for enhancing methane production from WAS is economically attractive, particularly considering that iron scrap can be freely acquired from industrial waste. Based on these results, the ZVI-based anaerobic digestion process of this work could be easily integrated with the conventional chemical phosphorus removal process in wastewater treatment plant to form a cost-effective and environment-friendly approach, enabling maximum resource recovery/reuse while achieving enhanced methane production in wastewater treatment system.
dc.format	Electronic
dc.language	eng
dc.publisher	NATURE PUBLISHING GROUP
dc.relation	http://purl.org/au-research/grants/arc/DE130100451
dc.relation	http://purl.org/au-research/grants/arc/LP110201095
dc.relation	http://purl.org/au-research/grants/arc/DP130103147
dc.relation.ispartof	Sci Rep
dc.relation.isbasedon	10.1038/srep08263
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.mesh	Hydrolysis
dc.subject.mesh	Iron
dc.subject.mesh	Methane
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Iron
dc.subject.mesh	Methane
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Hydrolysis
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Hydrolysis
dc.subject.mesh	Iron
dc.subject.mesh	Methane
dc.subject.mesh	Models, Theoretical
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.title	Zero valent iron significantly enhances methane production from waste activated sludge by improving biochemical methane potential rather than hydrolysis rate.
dc.type	Journal Article
utslib.citation.volume	5
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	2023-03-23T23:05:23Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	5
utslib.citation.issue	1

Abstract:

Anaerobic digestion has been widely applied for waste activated sludge (WAS) treatment. However, methane production from anaerobic digestion of WAS is usually limited by the slow hydrolysis rate and/or poor biochemical methane potential of WAS. This work systematically studied the effects of three different types of zero valent iron (i.e., iron powder, clean scrap and rusty scrap) on methane production from WAS in anaerobic digestion, by using both experimental and mathematical approaches. The results demonstrated that both the clean and the rusty iron scrap were more effective than the iron powder for improving methane production from WAS. Model-based analysis showed that ZVI addition significantly enhanced methane production from WAS through improving the biochemical methane potential of WAS rather than its hydrolysis rate. Economic analysis indicated that the ZVI-based technology for enhancing methane production from WAS is economically attractive, particularly considering that iron scrap can be freely acquired from industrial waste. Based on these results, the ZVI-based anaerobic digestion process of this work could be easily integrated with the conventional chemical phosphorus removal process in wastewater treatment plant to form a cost-effective and environment-friendly approach, enabling maximum resource recovery/reuse while achieving enhanced methane production in wastewater treatment system.

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http://hdl.handle.net/10453/168276