Biological Nitrogen Removal through Nitritation Coupled with Thiosulfate-Driven Denitritation.

Qian, J; Zhou, J; Zhang, Z; Liu, R; Wang, Q

Biological Nitrogen Removal through Nitritation Coupled with Thiosulfate-Driven Denitritation.

Qian, J Zhou, J Zhang, Z Liu, R Wang, Q

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Publisher:: NATURE PUBLISHING GROUP
Publication Type:: Journal Article
Citation:: Sci Rep, 2016, 6, (1), pp. 27502
Issue Date:: 2016-06-08

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Field	Value	Language
dc.contributor.author	Qian, J
dc.contributor.author	Zhou, J
dc.contributor.author	Zhang, Z
dc.contributor.author	Liu, R
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.date.accessioned	2022-08-02T21:37:54Z
dc.date.available	2016-05-19
dc.date.available	2022-08-02T21:37:54Z
dc.date.issued	2016-06-08
dc.identifier.citation	Sci Rep, 2016, 6, (1), pp. 27502
dc.identifier.issn	2045-2322
dc.identifier.issn	2045-2322
dc.identifier.uri	http://hdl.handle.net/10453/159507
dc.description.abstract	A novel biological nitrogen removal system based on nitritation coupled with thiosulfate-driven denitritation (Nitritation-TDD) was developed to achieve a high nitrogen removal rate and low sludge production. A nitritation sequential batch reactor (nitritation SBR) and an anoxic up-flow sludge bed (AnUSB) reactor were applied for effective nitritation and denitritation, respectively. Above 75% nitrite was accumulated in the nitritation SBR with an influent ammonia loading rate of 0.43 kg N/d/m(3). During Nitritation-TDD operation, particle sizes (d50) of the sludge decreased from 406 to 225 um in nitritation SBR and from 327-183 um in AnUSB reactor. Pyrosequencing tests revealed that ammonium-oxidizing bacteria (AOB) population was stabilized at approximately 7.0% (calculated as population of AOB-related genus divided by the total microbial population) in the nitritation SBR. In contrast, nitrite-oxidizing bacteria (NOB) population decreased from 6.5-0.6% over the same time, indicating the effective nitrite accumulation in the nitritation SBR. Thiobacillus, accounting for 34.2% in the AnUSB reactor, was mainly responsible for nitrogen removal via autotrophic denitritation, using an external source of thiosulfate as electron donor. Also, it was found that free nitrous acid could directly affect the denitritation activity.
dc.format	Electronic
dc.language	eng
dc.publisher	NATURE PUBLISHING GROUP
dc.relation	http://purl.org/au-research/grants/arc/DE160100667
dc.relation.ispartof	Sci Rep
dc.relation.isbasedon	10.1038/srep27502
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.mesh	Biomass
dc.subject.mesh	Bioreactors
dc.subject.mesh	Denitrification
dc.subject.mesh	Nitrates
dc.subject.mesh	Nitrogen
dc.subject.mesh	Particle Size
dc.subject.mesh	Sewage
dc.subject.mesh	Thiosulfates
dc.subject.mesh	Nitrates
dc.subject.mesh	Thiosulfates
dc.subject.mesh	Nitrogen
dc.subject.mesh	Bioreactors
dc.subject.mesh	Biomass
dc.subject.mesh	Sewage
dc.subject.mesh	Particle Size
dc.subject.mesh	Denitrification
dc.title	Biological Nitrogen Removal through Nitritation Coupled with Thiosulfate-Driven Denitritation.
dc.type	Journal Article
utslib.citation.volume	6
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	open_access	*
dc.date.updated	2022-08-02T21:37:51Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	6
utslib.citation.issue	1

Abstract:

A novel biological nitrogen removal system based on nitritation coupled with thiosulfate-driven denitritation (Nitritation-TDD) was developed to achieve a high nitrogen removal rate and low sludge production. A nitritation sequential batch reactor (nitritation SBR) and an anoxic up-flow sludge bed (AnUSB) reactor were applied for effective nitritation and denitritation, respectively. Above 75% nitrite was accumulated in the nitritation SBR with an influent ammonia loading rate of 0.43 kg N/d/m(3). During Nitritation-TDD operation, particle sizes (d50) of the sludge decreased from 406 to 225 um in nitritation SBR and from 327-183 um in AnUSB reactor. Pyrosequencing tests revealed that ammonium-oxidizing bacteria (AOB) population was stabilized at approximately 7.0% (calculated as population of AOB-related genus divided by the total microbial population) in the nitritation SBR. In contrast, nitrite-oxidizing bacteria (NOB) population decreased from 6.5-0.6% over the same time, indicating the effective nitrite accumulation in the nitritation SBR. Thiobacillus, accounting for 34.2% in the AnUSB reactor, was mainly responsible for nitrogen removal via autotrophic denitritation, using an external source of thiosulfate as electron donor. Also, it was found that free nitrous acid could directly affect the denitritation activity.

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http://hdl.handle.net/10453/159507