The mitigation effect of free ammonia and free nitrous acid on nitrous oxide production from the full-nitrification and partial-nitritation systems.

Peng, L; Qiu, H; Li, S; Xu, Y; Liang, C; Wang, N; Liu, Y; Ni, B-J

The mitigation effect of free ammonia and free nitrous acid on nitrous oxide production from the full-nitrification and partial-nitritation systems.

Peng, L Qiu, H Li, S Xu, Y Liang, C Wang, N Liu, Y

Ni, B-J

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Bioresour Technol, 2023, 372, pp. 128564
Issue Date:: 2023-03

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Field	Value	Language
dc.contributor.author	Peng, L
dc.contributor.author	Qiu, H
dc.contributor.author	Li, S
dc.contributor.author	Xu, Y
dc.contributor.author	Liang, C
dc.contributor.author	Wang, N
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961
dc.contributor.author	Ni, B-J
dc.date.accessioned	2023-03-13T03:23:53Z
dc.date.available	2022-12-29
dc.date.available	2023-03-13T03:23:53Z
dc.date.issued	2023-03
dc.identifier.citation	Bioresour Technol, 2023, 372, pp. 128564
dc.identifier.issn	0960-8524
dc.identifier.issn	1873-2976
dc.identifier.uri	http://hdl.handle.net/10453/167131
dc.description.abstract	The potentials of using endogenous free ammonia (FA) and free nitrous acid (FNA) as nitrous oxide (N2O) mitigators were investigated in treatment of both mainstream and sidestream wastewater. Although the N2O emission factor of a sidestream partial-nitritation (PN) reactor (averaged 1.70 % ± 0.39 %, n = 30) was about 2.4 times higher than a mainstream full-nitrification (FN) reactor (averaged 0.72 % ± 0.24 %, n = 30) (P < 0.01), one-hour exposure of PN sludge to 1.5 mg HNO2-N/L FNA could virtually abolish N2O emission. As for FN sludge, both 45 mg NH3-N/L FA and 0.015 mg HNO2-N/L FNA successfully mitigated N2O production at varying dissolved oxygen (DO) levels (50 % vs 61 %), while 1.5 mg HNO2-N/L FNA not only reduced more N2O (92 %) but also altered the N2O dependency on DO. Both FNA and FA sludge treatment were effective N2O mitigation strategies with FNA toward the end of carbon neutrality and FA being more economically appealing (2 % cost saving).
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier BV
dc.relation.ispartof	Bioresour Technol
dc.relation.isbasedon	10.1016/j.biortech.2022.128564
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Biotechnology
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Ammonia
dc.subject.mesh	Nitrification
dc.subject.mesh	Sewage
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Bioreactors
dc.subject.mesh	Oxygen
dc.subject.mesh	Nitrites
dc.subject.mesh	Nitrous Acid
dc.subject.mesh	Nitrites
dc.subject.mesh	Oxygen
dc.subject.mesh	Ammonia
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Bioreactors
dc.subject.mesh	Sewage
dc.subject.mesh	Nitrification
dc.title	The mitigation effect of free ammonia and free nitrous acid on nitrous oxide production from the full-nitrification and partial-nitritation systems.
dc.type	Journal Article
utslib.citation.volume	372
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	2023-03-13T03:23:37Z
pubs.publication-status	Published
pubs.volume	372

Abstract:

The potentials of using endogenous free ammonia (FA) and free nitrous acid (FNA) as nitrous oxide (N2O) mitigators were investigated in treatment of both mainstream and sidestream wastewater. Although the N2O emission factor of a sidestream partial-nitritation (PN) reactor (averaged 1.70 % ± 0.39 %, n = 30) was about 2.4 times higher than a mainstream full-nitrification (FN) reactor (averaged 0.72 % ± 0.24 %, n = 30) (P < 0.01), one-hour exposure of PN sludge to 1.5 mg HNO2-N/L FNA could virtually abolish N2O emission. As for FN sludge, both 45 mg NH3-N/L FA and 0.015 mg HNO2-N/L FNA successfully mitigated N2O production at varying dissolved oxygen (DO) levels (50 % vs 61 %), while 1.5 mg HNO2-N/L FNA not only reduced more N2O (92 %) but also altered the N2O dependency on DO. Both FNA and FA sludge treatment were effective N2O mitigation strategies with FNA toward the end of carbon neutrality and FA being more economically appealing (2 % cost saving).

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http://hdl.handle.net/10453/167131