Autotrophic denitrification of NO for effectively recovering N2O through using thiosulfate as sole electron donor.

Wu, L; Wang, L-K; Wei, W; Ni, B-J

Autotrophic denitrification of NO for effectively recovering N2O through using thiosulfate as sole electron donor.

Wu, L Wang, L-K Wei, W

Ni, B-J

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Bioresour Technol, 2022, 347, pp. 126681
Issue Date:: 2022-03

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Field	Value	Language
dc.contributor.author	Wu, L
dc.contributor.author	Wang, L-K
dc.contributor.author	Wei, W https://orcid.org/0000-0001-5613-337X
dc.contributor.author	Ni, B-J
dc.date.accessioned	2023-03-20T04:06:22Z
dc.date.available	2022-01-01
dc.date.available	2023-03-20T04:06:22Z
dc.date.issued	2022-03
dc.identifier.citation	Bioresour Technol, 2022, 347, pp. 126681
dc.identifier.issn	0960-8524
dc.identifier.issn	1873-2976
dc.identifier.uri	http://hdl.handle.net/10453/167749
dc.description.abstract	To reclaim nitrous oxide (N2O) as an energy resource economically, this study developed an autotrophic denitrification-based system with thiosulfate (S2O32-) and nitric oxide (NO) as electron donor and acceptor, respectively. NO from flue gases is absorbed on Fe(II)EDTA to overcome its low solubility in liquid phase by forming Fe(II)EDTA-NO. Short-term batch tests and long-term continuous experiments were conducted to investigate the N2O production profile and NO conversion efficiency from thiosulfate-based denitrification under varied Fe (II)EDTA-NO conditions (5-20 mM). Up to 39% of NO was converted to gaseous N2O at 20 mM Fe(II)EDTA-NO amid batch test due to the inhibition of key enzymatic activities by NO and the acidic conditions following thiosulfate oxidation. Higher Fe(II)EDTA-NO levels induced lower enzymatic activities with N2OR being suppressed harder than NOR. Microbial diversity was reduced in the continuous thiosulfate-driven Fe(II)EDTA-NO-based denitrification system. NO-resistant bacteria and sulfide-tolerant denitrifiers were enriched, facilitating NO conversion to N2O thereafter.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	ELSEVIER SCI LTD
dc.relation	http://purl.org/au-research/grants/arc/FT160100195
dc.relation	http://purl.org/au-research/grants/arc/DE220100530
dc.relation.ispartof	Bioresour Technol
dc.relation.isbasedon	10.1016/j.biortech.2022.126681
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Biotechnology
dc.subject.mesh	Autotrophic Processes
dc.subject.mesh	Bioreactors
dc.subject.mesh	Denitrification
dc.subject.mesh	Electrons
dc.subject.mesh	Nitric Oxide
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Thiosulfates
dc.subject.mesh	Thiosulfates
dc.subject.mesh	Nitric Oxide
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Bioreactors
dc.subject.mesh	Electrons
dc.subject.mesh	Autotrophic Processes
dc.subject.mesh	Denitrification
dc.subject.mesh	Autotrophic Processes
dc.subject.mesh	Bioreactors
dc.subject.mesh	Denitrification
dc.subject.mesh	Electrons
dc.subject.mesh	Nitric Oxide
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Thiosulfates
dc.title	Autotrophic denitrification of NO for effectively recovering N2O through using thiosulfate as sole electron donor.
dc.type	Journal Article
utslib.citation.volume	347
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	2023-03-20T04:06:21Z
pubs.publication-status	Published
pubs.volume	347

Abstract:

To reclaim nitrous oxide (N2O) as an energy resource economically, this study developed an autotrophic denitrification-based system with thiosulfate (S2O32-) and nitric oxide (NO) as electron donor and acceptor, respectively. NO from flue gases is absorbed on Fe(II)EDTA to overcome its low solubility in liquid phase by forming Fe(II)EDTA-NO. Short-term batch tests and long-term continuous experiments were conducted to investigate the N2O production profile and NO conversion efficiency from thiosulfate-based denitrification under varied Fe (II)EDTA-NO conditions (5-20 mM). Up to 39% of NO was converted to gaseous N2O at 20 mM Fe(II)EDTA-NO amid batch test due to the inhibition of key enzymatic activities by NO and the acidic conditions following thiosulfate oxidation. Higher Fe(II)EDTA-NO levels induced lower enzymatic activities with N2OR being suppressed harder than NOR. Microbial diversity was reduced in the continuous thiosulfate-driven Fe(II)EDTA-NO-based denitrification system. NO-resistant bacteria and sulfide-tolerant denitrifiers were enriched, facilitating NO conversion to N2O thereafter.

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http://hdl.handle.net/10453/167749