Revealing the mechanisms of polypyrrole (Ppy) enhancing methane production from anaerobic digestion of waste activated sludge (WAS).

Qian, J; Zhang, Y; Bai, L; Yan, X; Du, Y; Ma, R; Ni, B-J

Revealing the mechanisms of polypyrrole (Ppy) enhancing methane production from anaerobic digestion of waste activated sludge (WAS).

Qian, J Zhang, Y Bai, L Yan, X Du, Y Ma, R Ni, B-J

Permalink

Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Water Res, 2022, 226, pp. 119291
Issue Date:: 2022-11-01

Closed Access

	Filename	Description	Size
	Revealing the mechanisms of polypyrrole.pdf		4.07 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	Qian, J
dc.contributor.author	Zhang, Y
dc.contributor.author	Bai, L
dc.contributor.author	Yan, X
dc.contributor.author	Du, Y
dc.contributor.author	Ma, R
dc.contributor.author	Ni, B-J
dc.date.accessioned	2023-03-23T01:55:15Z
dc.date.available	2022-10-22
dc.date.available	2023-03-23T01:55:15Z
dc.date.issued	2022-11-01
dc.identifier.citation	Water Res, 2022, 226, pp. 119291
dc.identifier.issn	0043-1354
dc.identifier.issn	1879-2448
dc.identifier.uri	http://hdl.handle.net/10453/168146
dc.description.abstract	Anaerobic digestion (AD) is a promising method for treating waste activated sludge (WAS), but the low methane yield limits its large-scale application. The addition of conductive nanomaterials has been demonstrated to enhance the activity of AD via promoting the direct interspecies electron transfer (DIET). In this study, novel conductive polypyrrole (Ppy) was prepared to effectively improve the AD performance of WAS. The results showed that the accumulative methane production was enhanced by 27.83% by Ppy, with both acidogenesis and methanogenesis being efficiently accelerated. The microbial community analysis indicated that the abundance of bacteria associated with acidogenesis process was significantly elevated by Ppy. Further investigation by metatranscriptomics revealed that fadE and fadN genes (to express the key enzymes in fatty acid metabolism) were highly expressed in the Ppy-driven AD, suggesting that Ppy promoted electron generation during acid production. For methanogenesis metabolism, genes related to acetate utilization and CO2 utilization methanogenesis were also up-regulated by Ppy, illustrating that Ppy facilitates the utilization of acetate and electrons by methanogenic archaea, thus potentially promoting the methanogenesis through DIET.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Water Res
dc.relation.isbasedon	10.1016/j.watres.2022.119291
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Engineering
dc.subject.mesh	Sewage
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Polymers
dc.subject.mesh	Pyrroles
dc.subject.mesh	Bioreactors
dc.subject.mesh	Methane
dc.subject.mesh	Methane
dc.subject.mesh	Pyrroles
dc.subject.mesh	Polymers
dc.subject.mesh	Bioreactors
dc.subject.mesh	Sewage
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Sewage
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Polymers
dc.subject.mesh	Pyrroles
dc.subject.mesh	Bioreactors
dc.subject.mesh	Methane
dc.title	Revealing the mechanisms of polypyrrole (Ppy) enhancing methane production from anaerobic digestion of waste activated sludge (WAS).
dc.type	Journal Article
utslib.citation.volume	226
utslib.location.activity	England
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	*
dc.date.updated	2023-03-23T01:55:10Z
pubs.publication-status	Published
pubs.volume	226

Abstract:

Anaerobic digestion (AD) is a promising method for treating waste activated sludge (WAS), but the low methane yield limits its large-scale application. The addition of conductive nanomaterials has been demonstrated to enhance the activity of AD via promoting the direct interspecies electron transfer (DIET). In this study, novel conductive polypyrrole (Ppy) was prepared to effectively improve the AD performance of WAS. The results showed that the accumulative methane production was enhanced by 27.83% by Ppy, with both acidogenesis and methanogenesis being efficiently accelerated. The microbial community analysis indicated that the abundance of bacteria associated with acidogenesis process was significantly elevated by Ppy. Further investigation by metatranscriptomics revealed that fadE and fadN genes (to express the key enzymes in fatty acid metabolism) were highly expressed in the Ppy-driven AD, suggesting that Ppy promoted electron generation during acid production. For methanogenesis metabolism, genes related to acetate utilization and CO2 utilization methanogenesis were also up-regulated by Ppy, illustrating that Ppy facilitates the utilization of acetate and electrons by methanogenic archaea, thus potentially promoting the methanogenesis through DIET.

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

http://hdl.handle.net/10453/168146