Functional evaluation of pollutant transformation in sediment from combined sewer system

Shi, X; Ngo, HH; Sang, L; Jin, P; Wang, XC; Wang, G

Functional evaluation of pollutant transformation in sediment from combined sewer system

Shi, X Ngo, HH

Sang, L Jin, P Wang, XC Wang, G

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Publication Type:: Journal Article
Citation:: Environmental Pollution, 2018, 238 pp. 85 - 93
Issue Date:: 2018-07-01

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Field	Value	Language
dc.contributor.author	Shi, X	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.contributor.author	Sang, L	en_US
dc.contributor.author	Jin, P	en_US
dc.contributor.author	Wang, XC	en_US
dc.contributor.author	Wang, G	en_US
dc.date.available	2020-07-01T19:09:51Z
dc.date.issued	2018-07-01	en_US
dc.identifier.citation	Environmental Pollution, 2018, 238 pp. 85 - 93	en_US
dc.identifier.issn	0269-7491	en_US
dc.identifier.uri	http://hdl.handle.net/10453/128043
dc.description.abstract	© 2018 Elsevier Ltd In this study, a pilot combined sewer system was constructed to characterize the pollutant transformation in sewer sediment. The results showed that particulate contaminants deposited from sewage could be transformed into dissolved matter by distinct pollutant transformation pathways. Although the oxidation-reduction potential (ORP) was varied from −80 mV to −340 mV in different region of the sediment, the fermentation was the dominant process in all regions of the sediment, which induced hydrolysis and decomposition of particulate contaminants. As a result, the accumulation of dissolved organic matter and the variation of ORP values along the sediment depth led to the depth-dependent reproduction characteristics of methanogens and sulfate-reducing bacteria, which were existed in the middle and deep layer of the sediment respectively. However, the diversity of nitrifying and polyphosphate-accumulating bacteria was low in sewer sediment and those microbial communities showed a non-significant correlation with nitrogen and phosphorus contaminants, which indicated that the enrichment of nitrogen and phosphorus contaminants was mainly caused by physical deposition process. Thus, this study proposed a promising pathway to evaluate pollutant transformation and can help provide theoretical foundation for urban sewer improvement.	en_US
dc.relation.ispartof	Environmental Pollution	en_US
dc.relation.isbasedon	10.1016/j.envpol.2018.03.007	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Bacteria	en_US
dc.subject.mesh	Nitrogen	en_US
dc.subject.mesh	Phosphorus	en_US
dc.subject.mesh	Water Pollutants	en_US
dc.subject.mesh	Polymerase Chain Reaction	en_US
dc.subject.mesh	Sewage	en_US
dc.subject.mesh	Fermentation	en_US
dc.subject.mesh	Geologic Sediments	en_US
dc.subject.mesh	Microbial Consortia	en_US
dc.subject.mesh	Environmental Restoration and Remediation	en_US
dc.title	Functional evaluation of pollutant transformation in sediment from combined sewer system	en_US
dc.type	Journal Article
utslib.citation.volume	238	en_US
utslib.for	0907 Environmental Engineering	en_US
pubs.embargo.period	Not known	en_US
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	*
pubs.publication-status	Published	en_US
pubs.volume	238	en_US

Abstract:

© 2018 Elsevier Ltd In this study, a pilot combined sewer system was constructed to characterize the pollutant transformation in sewer sediment. The results showed that particulate contaminants deposited from sewage could be transformed into dissolved matter by distinct pollutant transformation pathways. Although the oxidation-reduction potential (ORP) was varied from −80 mV to −340 mV in different region of the sediment, the fermentation was the dominant process in all regions of the sediment, which induced hydrolysis and decomposition of particulate contaminants. As a result, the accumulation of dissolved organic matter and the variation of ORP values along the sediment depth led to the depth-dependent reproduction characteristics of methanogens and sulfate-reducing bacteria, which were existed in the middle and deep layer of the sediment respectively. However, the diversity of nitrifying and polyphosphate-accumulating bacteria was low in sewer sediment and those microbial communities showed a non-significant correlation with nitrogen and phosphorus contaminants, which indicated that the enrichment of nitrogen and phosphorus contaminants was mainly caused by physical deposition process. Thus, this study proposed a promising pathway to evaluate pollutant transformation and can help provide theoretical foundation for urban sewer improvement.

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http://hdl.handle.net/10453/128043