Evaluation of an intermittent-aeration constructed wetland for removing residual organics and nutrients from secondary effluent: Performance and microbial analysis.

Li, J; Zheng, L; Ye, C; Ni, B; Wang, X; Liu, H

Evaluation of an intermittent-aeration constructed wetland for removing residual organics and nutrients from secondary effluent: Performance and microbial analysis.

Li, J Zheng, L

Ye, C Ni, B Wang, X Liu, H

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Bioresour Technol, 2021, 329, pp. 124897
Issue Date:: 2021-06

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Field	Value	Language
dc.contributor.author	Li, J
dc.contributor.author	Zheng, L https://orcid.org/0000-0002-6352-8975
dc.contributor.author	Ye, C
dc.contributor.author	Ni, B
dc.contributor.author	Wang, X
dc.contributor.author	Liu, H
dc.date.accessioned	2022-04-23T22:52:09Z
dc.date.available	2021-02-20
dc.date.available	2022-04-23T22:52:09Z
dc.date.issued	2021-06
dc.identifier.citation	Bioresour Technol, 2021, 329, pp. 124897
dc.identifier.issn	0960-8524
dc.identifier.issn	1873-2976
dc.identifier.uri	http://hdl.handle.net/10453/156564
dc.description.abstract	This study proposed a novel intermittent-aeration constructed wetland (CW) to resolve the vertical loss of oxygen in tertiary treatment. Compared to the non-aeration CW, the intermittent-aeration CW presented a better removal performance (90.8% chemical oxygen demand, 94.3% ammonia nitrogen, 91.5% total nitrogen and 94.1% total phosphorus) at a dissolved oxygen of 3 mg L-1 and hydraulic retention time of 2 days. It was mainly attributed to the higher abundance and greater diversity of bacterial community due to the oxygen supply. High-throughput sequencing indicated that high abundance of phyla Proteobacteria (35.34%) and Bacteroidetes (18.20%) in intermittent-aeration CW were responsible for simultaneous nitrogen and phosphorus removal. Besides, the dominant families Burkholderiaceae (11.16%), Microtrichales (6.88%) and Saprospiraceae (6.50%) were also detected, which was vital to hydrolyze and utilize complex organic matters. In general, oxygen supply upregulated the metabolism pathways of amino acid and carbohydrate, bringing a greater biodegradation potential for removing contaminants.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Bioresour Technol
dc.relation.isbasedon	10.1016/j.biortech.2021.124897
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Biotechnology
dc.subject.mesh	Biological Oxygen Demand Analysis
dc.subject.mesh	Humans
dc.subject.mesh	Nitrogen
dc.subject.mesh	Nutrients
dc.subject.mesh	Phosphorus
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Wetlands
dc.subject.mesh	Humans
dc.subject.mesh	Nitrogen
dc.subject.mesh	Phosphorus
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Wetlands
dc.subject.mesh	Biological Oxygen Demand Analysis
dc.subject.mesh	Nutrients
dc.title	Evaluation of an intermittent-aeration constructed wetland for removing residual organics and nutrients from secondary effluent: Performance and microbial analysis.
dc.type	Journal Article
utslib.citation.volume	329
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
utslib.copyright.status	closed_access	*
dc.date.updated	2022-04-23T22:52:03Z
pubs.publication-status	Published
pubs.volume	329

Abstract:

This study proposed a novel intermittent-aeration constructed wetland (CW) to resolve the vertical loss of oxygen in tertiary treatment. Compared to the non-aeration CW, the intermittent-aeration CW presented a better removal performance (90.8% chemical oxygen demand, 94.3% ammonia nitrogen, 91.5% total nitrogen and 94.1% total phosphorus) at a dissolved oxygen of 3 mg L-1 and hydraulic retention time of 2 days. It was mainly attributed to the higher abundance and greater diversity of bacterial community due to the oxygen supply. High-throughput sequencing indicated that high abundance of phyla Proteobacteria (35.34%) and Bacteroidetes (18.20%) in intermittent-aeration CW were responsible for simultaneous nitrogen and phosphorus removal. Besides, the dominant families Burkholderiaceae (11.16%), Microtrichales (6.88%) and Saprospiraceae (6.50%) were also detected, which was vital to hydrolyze and utilize complex organic matters. In general, oxygen supply upregulated the metabolism pathways of amino acid and carbohydrate, bringing a greater biodegradation potential for removing contaminants.

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http://hdl.handle.net/10453/156564