Feasibility of Partial Nitrification Combined with Nitrite-Denitrification Phosphorus Removal and Simultaneous Nitrification-Endogenous Denitrification for Synchronous Chemical Oxygen Demand, Nitrogen, and Phosphorus Removal

Zhen, J; Zhao, Y; Yu, X; Guo, W; Qiao, Z; Ismail, S; Ni, SQ

Feasibility of Partial Nitrification Combined with Nitrite-Denitrification Phosphorus Removal and Simultaneous Nitrification-Endogenous Denitrification for Synchronous Chemical Oxygen Demand, Nitrogen, and Phosphorus Removal

Zhen, J Zhao, Y Yu, X Guo, W

Qiao, Z Ismail, S Ni, SQ

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Publisher:: American Chemical Society (ACS)
Publication Type:: Journal Article
Citation:: ACS ES and T Water, 2022, 2, (6), pp. 1119-1131
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Zhen, J
dc.contributor.author	Zhao, Y
dc.contributor.author	Yu, X
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858
dc.contributor.author	Qiao, Z
dc.contributor.author	Ismail, S
dc.contributor.author	Ni, SQ
dc.date.accessioned	2023-01-26T01:34:01Z
dc.date.available	2023-01-26T01:34:01Z
dc.date.issued	2022-01-01
dc.identifier.citation	ACS ES and T Water, 2022, 2, (6), pp. 1119-1131
dc.identifier.issn	2690-0637
dc.identifier.issn	2690-0637
dc.identifier.uri	http://hdl.handle.net/10453/165453
dc.description.abstract	A combination of partial nitrification and nitrite-denitrifying phosphorus removal and simultaneous nitrification-endogenous denitrification (nDNPR-SNED) in two sequencing batch reactors was developed for synchronous chemical oxygen demand (COD), nitrogen (N), and phosphorus (P) removal by regulating dissolved oxygen (DO) and influent nitrite concentrations. COD, total nitrogen, and P removal efficiencies of 87.4 ± 0.5, 91.6 ± 1.1, and 97.8 ± 0.6% were obtained after 112 days of anaerobic/anoxic/aerobic operation. Mass balance analysis confirmed that 91.9% of the COD was stored as intracellular carbon at the anaerobic stage, and 99.6% of PO43-P and 99.8% of NO2-N were eliminated via the nDNPR process at the anoxic stage, and at the aerobic stage, the SNED process contributed to 68.7% nitrogen removal. Genera of Candidatus Competibacter, Dechloromonas, Ellin6067, and Nitrospirae were the dominant consortia with a relative abundance of 26.5, 16.5, 1.0, and 1.1%, respectively. In the metabolic pathway model, β-hydroxybutyrate was the main endogenous driving force for nitrogen and phosphorus removal. Compared with conventional biological nitrogen and phosphorus removal processes, the combined process could achieve 6.7% saving in the total cost. The proposed approach provides an economic and technical alternative for C-, N-, and P-laden wastewater treatment, reducing both carbon demand and aeration consumption.
dc.language	en
dc.publisher	American Chemical Society (ACS)
dc.relation.ispartof	ACS ES and T Water
dc.relation.isbasedon	10.1021/acsestwater.2c00126
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.rights	This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in ACS ES&T Water, copyright © 2022 American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acsestwater.2c00126
dc.title	Feasibility of Partial Nitrification Combined with Nitrite-Denitrification Phosphorus Removal and Simultaneous Nitrification-Endogenous Denitrification for Synchronous Chemical Oxygen Demand, Nitrogen, and Phosphorus Removal
dc.type	Journal Article
utslib.citation.volume	2
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	*
utslib.copyright.embargo	2023-05-26T00:00:00+1000Z
dc.date.updated	2023-01-26T01:33:51Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	2
utslib.citation.issue	6

Abstract:

A combination of partial nitrification and nitrite-denitrifying phosphorus removal and simultaneous nitrification-endogenous denitrification (nDNPR-SNED) in two sequencing batch reactors was developed for synchronous chemical oxygen demand (COD), nitrogen (N), and phosphorus (P) removal by regulating dissolved oxygen (DO) and influent nitrite concentrations. COD, total nitrogen, and P removal efficiencies of 87.4 ± 0.5, 91.6 ± 1.1, and 97.8 ± 0.6% were obtained after 112 days of anaerobic/anoxic/aerobic operation. Mass balance analysis confirmed that 91.9% of the COD was stored as intracellular carbon at the anaerobic stage, and 99.6% of PO43-P and 99.8% of NO2-N were eliminated via the nDNPR process at the anoxic stage, and at the aerobic stage, the SNED process contributed to 68.7% nitrogen removal. Genera of Candidatus Competibacter, Dechloromonas, Ellin6067, and Nitrospirae were the dominant consortia with a relative abundance of 26.5, 16.5, 1.0, and 1.1%, respectively. In the metabolic pathway model, β-hydroxybutyrate was the main endogenous driving force for nitrogen and phosphorus removal. Compared with conventional biological nitrogen and phosphorus removal processes, the combined process could achieve 6.7% saving in the total cost. The proposed approach provides an economic and technical alternative for C-, N-, and P-laden wastewater treatment, reducing both carbon demand and aeration consumption.

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