Bacterial dynamics and functions driven by bulking agents to mitigate gaseous emissions in kitchen waste composting.

Xu, Z; Xu, W; Zhang, L; Ma, Y; Li, Y; Li, G; Nghiem, LD; Luo, W

Bacterial dynamics and functions driven by bulking agents to mitigate gaseous emissions in kitchen waste composting.

Xu, Z Xu, W Zhang, L Ma, Y Li, Y Li, G Nghiem, LD Luo, W

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Bioresour Technol, 2021, 332, pp. 125028
Issue Date:: 2021-07

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Field	Value	Language
dc.contributor.author	Xu, Z
dc.contributor.author	Xu, W
dc.contributor.author	Zhang, L
dc.contributor.author	Ma, Y
dc.contributor.author	Li, Y
dc.contributor.author	Li, G
dc.contributor.author	Nghiem, LD
dc.contributor.author	Luo, W
dc.date.accessioned	2022-03-19T22:52:28Z
dc.date.available	2021-03-17
dc.date.available	2022-03-19T22:52:28Z
dc.date.issued	2021-07
dc.identifier.citation	Bioresour Technol, 2021, 332, pp. 125028
dc.identifier.issn	0960-8524
dc.identifier.issn	1873-2976
dc.identifier.uri	http://hdl.handle.net/10453/155373
dc.description.abstract	This study investigated the impacts of different bulking agents (i.e. garden waste, cornstalks, and spent mushroom substrates) on bacterial structure and functions for gaseous emissions during kitchen waste composting. High-throughput sequencing was integrated with functional Annotation of Prokaryotic Taxa (FAPROTAX) to decipher the bacterial structure and functions. Results show that adding cornstalks constructed a more complex and mutualistic bacterial network to enhance organic biodegradation. This scenario, however, aggravated the emission of ammonia and hydrogen sulphide with the enrichment of the genus Bacillus and Desulfitibacter at the thermophilic stage of composting to facilitate ammonification and sulphur-related respiration, respectively. By contrast, spent mushroom substrates facilitated the proliferation of the genus Pseudomonas to promote nitrate reduction at the cooling stage, leading to considerable emission of nitrous oxide. Compared to these two agents, garden waste contained less easily biodegradable substances to limit bacterial mutualism, thereby reducing gaseous emissions in composting.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Bioresour Technol
dc.relation.isbasedon	10.1016/j.biortech.2021.125028
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Biotechnology
dc.subject.mesh	Ammonia
dc.subject.mesh	Composting
dc.subject.mesh	Gardens
dc.subject.mesh	Gases
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Soil
dc.subject.mesh	Gases
dc.subject.mesh	Ammonia
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Soil
dc.subject.mesh	Gardens
dc.subject.mesh	Composting
dc.title	Bacterial dynamics and functions driven by bulking agents to mitigate gaseous emissions in kitchen waste composting.
dc.type	Journal Article
utslib.citation.volume	332
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	2022-03-19T22:52:24Z
pubs.publication-status	Published
pubs.volume	332

Abstract:

This study investigated the impacts of different bulking agents (i.e. garden waste, cornstalks, and spent mushroom substrates) on bacterial structure and functions for gaseous emissions during kitchen waste composting. High-throughput sequencing was integrated with functional Annotation of Prokaryotic Taxa (FAPROTAX) to decipher the bacterial structure and functions. Results show that adding cornstalks constructed a more complex and mutualistic bacterial network to enhance organic biodegradation. This scenario, however, aggravated the emission of ammonia and hydrogen sulphide with the enrichment of the genus Bacillus and Desulfitibacter at the thermophilic stage of composting to facilitate ammonification and sulphur-related respiration, respectively. By contrast, spent mushroom substrates facilitated the proliferation of the genus Pseudomonas to promote nitrate reduction at the cooling stage, leading to considerable emission of nitrous oxide. Compared to these two agents, garden waste contained less easily biodegradable substances to limit bacterial mutualism, thereby reducing gaseous emissions in composting.

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http://hdl.handle.net/10453/155373