N2O production by ammonia oxidizing bacteria in an enriched nitrifying sludge linearly depends on inorganic carbon concentration.

Peng, L; Ni, B-J; Ye, L; Yuan, Z

N2O production by ammonia oxidizing bacteria in an enriched nitrifying sludge linearly depends on inorganic carbon concentration.

Peng, L Ni, B-J Ye, L Yuan, Z

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Water Res, 2015, 74, pp. 58-66
Issue Date:: 2015-05-01

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Field	Value	Language
dc.contributor.author	Peng, L
dc.contributor.author	Ni, B-J
dc.contributor.author	Ye, L
dc.contributor.author	Yuan, Z
dc.date.accessioned	2023-03-23T23:02:01Z
dc.date.available	2015-02-02
dc.date.available	2023-03-23T23:02:01Z
dc.date.issued	2015-05-01
dc.identifier.citation	Water Res, 2015, 74, pp. 58-66
dc.identifier.issn	0043-1354
dc.identifier.issn	1879-2448
dc.identifier.uri	http://hdl.handle.net/10453/168271
dc.description.abstract	The effect of inorganic carbon (IC) on nitrous oxide (N2O) production by ammonia oxidizing bacteria (AOB) was investigated over a concentration range of 0-12 mmol C/L, encompassing typical IC levels in a wastewater treatment reactors. The AOB culture was enriched along with nitrite-oxidizing bacteria (NOB) in a sequencing batch reactor (SBR) to perform complete nitrification. Batch experiments were conducted with continuous carbon dioxide (CO2) stripping or at controlled IC concentrations. The results revealed a linear relationship between N2O production rate (N2OR) and IC concentration (R(2) = 0.97) within the IC range studied, suggesting a substantial effect of IC on N2O production by AOB. Similar results were also obtained with an AOB culture treating anaerobic sludge digestion liquor. The fundamental mechanism responsible for this dependency is unclear; however, in agreement with previous studies, it was observed that the ammonia oxidation rate (AOR) was also influenced by the IC concentration, which could be well described by the Monod kinetics. These resulted in an exponential relationship between N2OR and AOR, as previously observed in experiments where AOR was altered by varying dissolved oxygen and ammonia concentrations. It is therefore possible that IC indirectly affected N2OR by causing a change in AOR. The observation in this study indicates that alkalinity (mostly contributed by IC) could be a significant factor influencing N2O production and should be taken into consideration in estimating and mitigating N2O emissions in wastewater treatment systems.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation	http://purl.org/au-research/grants/arc/DE130100451
dc.relation.ispartof	Water Res
dc.relation.isbasedon	10.1016/j.watres.2015.02.003
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Engineering
dc.subject.mesh	Ammonia
dc.subject.mesh	Bacteria
dc.subject.mesh	Bioreactors
dc.subject.mesh	Carbon
dc.subject.mesh	Nitrification
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Oxidation-Reduction
dc.subject.mesh	Oxygen
dc.subject.mesh	Sewage
dc.subject.mesh	Bacteria
dc.subject.mesh	Carbon
dc.subject.mesh	Oxygen
dc.subject.mesh	Ammonia
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Bioreactors
dc.subject.mesh	Sewage
dc.subject.mesh	Oxidation-Reduction
dc.subject.mesh	Nitrification
dc.subject.mesh	Ammonia
dc.subject.mesh	Bacteria
dc.subject.mesh	Bioreactors
dc.subject.mesh	Carbon
dc.subject.mesh	Nitrification
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Oxidation-Reduction
dc.subject.mesh	Oxygen
dc.subject.mesh	Sewage
dc.title	N2O production by ammonia oxidizing bacteria in an enriched nitrifying sludge linearly depends on inorganic carbon concentration.
dc.type	Journal Article
utslib.citation.volume	74
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	2023-03-23T23:02:00Z
pubs.publication-status	Published
pubs.volume	74

Abstract:

The effect of inorganic carbon (IC) on nitrous oxide (N2O) production by ammonia oxidizing bacteria (AOB) was investigated over a concentration range of 0-12 mmol C/L, encompassing typical IC levels in a wastewater treatment reactors. The AOB culture was enriched along with nitrite-oxidizing bacteria (NOB) in a sequencing batch reactor (SBR) to perform complete nitrification. Batch experiments were conducted with continuous carbon dioxide (CO2) stripping or at controlled IC concentrations. The results revealed a linear relationship between N2O production rate (N2OR) and IC concentration (R(2) = 0.97) within the IC range studied, suggesting a substantial effect of IC on N2O production by AOB. Similar results were also obtained with an AOB culture treating anaerobic sludge digestion liquor. The fundamental mechanism responsible for this dependency is unclear; however, in agreement with previous studies, it was observed that the ammonia oxidation rate (AOR) was also influenced by the IC concentration, which could be well described by the Monod kinetics. These resulted in an exponential relationship between N2OR and AOR, as previously observed in experiments where AOR was altered by varying dissolved oxygen and ammonia concentrations. It is therefore possible that IC indirectly affected N2OR by causing a change in AOR. The observation in this study indicates that alkalinity (mostly contributed by IC) could be a significant factor influencing N2O production and should be taken into consideration in estimating and mitigating N2O emissions in wastewater treatment systems.

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http://hdl.handle.net/10453/168271