Insights into N2O turnovers under polyethylene terephthalate microplastics stress in mainstream biological nitrogen removal process.
- Publisher:
- PERGAMON-ELSEVIER SCIENCE LTD
- Publication Type:
- Journal Article
- Citation:
- Water Res, 2022, 224, pp. 119037
- Issue Date:
- 2022-10-01
Closed Access
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Insights into N2O turnovers.pdf | 6.26 MB | Adobe PDF |
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Full metadata record
Field | Value | Language |
---|---|---|
dc.contributor.author | He, Y | |
dc.contributor.author | Liu, Y | |
dc.contributor.author | Yan, M | |
dc.contributor.author | Zhao, T | |
dc.contributor.author | Liu, Y | |
dc.contributor.author | Zhu, T | |
dc.contributor.author | Ni, B-J | |
dc.date.accessioned | 2023-03-23T02:06:19Z | |
dc.date.available | 2022-08-28 | |
dc.date.available | 2023-03-23T02:06:19Z | |
dc.date.issued | 2022-10-01 | |
dc.identifier.citation | Water Res, 2022, 224, pp. 119037 | |
dc.identifier.issn | 0043-1354 | |
dc.identifier.issn | 1879-2448 | |
dc.identifier.uri | http://hdl.handle.net/10453/168151 | |
dc.description.abstract | The ubiquitous microplastics in wastewater have raised growing concerns due to their unintended effects on microbial activities. However, whether and how microplastics affect nitrous oxide (N2O) (a potent greenhouse gas) turnovers in mainstream biological nitrogen removal (BNR) process remain unclear. This work therefore aimed to fill such knowledge gap by conducting both long-term and batch tests. After over 100 days of feeding with wastewater containing polyethylene terephthalate (PET) microplastics (0-500 μg/L), the long-term results showed that both production and reduction of N2O during denitrification were reduced, as well as the N2O production during nitrification. Accordingly, 60% reduction in N2O accumulation and 70% reduction in N2O production were observed in the denitrification and nitrification batch tests, respectively. Nevertheless, the long-term N2O emission factors under PET microplastics stress were comparable to that in the control reactor, mainly because PET microplastics led to more nitrite accumulation in anoxic period. With the aid of online N2O sensors and site-preference analysis, it was demonstrated that the heterotrophic bacteria pathway and ammonia oxidizing bacteria denitrification pathway for N2O production were negatively affected by PET microplastics, whereas a clear increase in the contribution of hydroxylamine pathway (+ 22.9%) was observed. Further investigation revealed that PET microplastics even at environmental level (i.e. 10 μg/L) significantly reshaped the BNR sludge characteristics (e.g. much larger particle size) and microbial communities (e.g. Thauera, Rhodobacte and Nitrospira) as well as the nitrogen metabolism pathways, which were chiefly responsible for the changes of N2O turnovers and N2O production pathways under the PET microplastics stress. | |
dc.format | Print-Electronic | |
dc.language | eng | |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | |
dc.relation.ispartof | Water Res | |
dc.relation.isbasedon | 10.1016/j.watres.2022.119037 | |
dc.rights | info:eu-repo/semantics/closedAccess | |
dc.subject.classification | Environmental Engineering | |
dc.subject.mesh | Ammonia | |
dc.subject.mesh | Bioreactors | |
dc.subject.mesh | Denitrification | |
dc.subject.mesh | Greenhouse Gases | |
dc.subject.mesh | Hydroxylamines | |
dc.subject.mesh | Microplastics | |
dc.subject.mesh | Nitrification | |
dc.subject.mesh | Nitrites | |
dc.subject.mesh | Nitrogen | |
dc.subject.mesh | Nitrous Oxide | |
dc.subject.mesh | Plastics | |
dc.subject.mesh | Polyethylene Terephthalates | |
dc.subject.mesh | Sewage | |
dc.subject.mesh | Wastewater | |
dc.subject.mesh | Nitrites | |
dc.subject.mesh | Nitrogen | |
dc.subject.mesh | Ammonia | |
dc.subject.mesh | Nitrous Oxide | |
dc.subject.mesh | Hydroxylamines | |
dc.subject.mesh | Plastics | |
dc.subject.mesh | Polyethylene Terephthalates | |
dc.subject.mesh | Bioreactors | |
dc.subject.mesh | Sewage | |
dc.subject.mesh | Denitrification | |
dc.subject.mesh | Nitrification | |
dc.subject.mesh | Greenhouse Gases | |
dc.subject.mesh | Microplastics | |
dc.subject.mesh | Wastewater | |
dc.subject.mesh | Ammonia | |
dc.subject.mesh | Bioreactors | |
dc.subject.mesh | Denitrification | |
dc.subject.mesh | Greenhouse Gases | |
dc.subject.mesh | Hydroxylamines | |
dc.subject.mesh | Microplastics | |
dc.subject.mesh | Nitrification | |
dc.subject.mesh | Nitrites | |
dc.subject.mesh | Nitrogen | |
dc.subject.mesh | Nitrous Oxide | |
dc.subject.mesh | Plastics | |
dc.subject.mesh | Polyethylene Terephthalates | |
dc.subject.mesh | Sewage | |
dc.subject.mesh | Wastewater | |
dc.title | Insights into N2O turnovers under polyethylene terephthalate microplastics stress in mainstream biological nitrogen removal process. | |
dc.type | Journal Article | |
utslib.citation.volume | 224 | |
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 | 2023-03-23T02:06:02Z | |
pubs.publication-status | Published | |
pubs.volume | 224 |
Abstract:
The ubiquitous microplastics in wastewater have raised growing concerns due to their unintended effects on microbial activities. However, whether and how microplastics affect nitrous oxide (N2O) (a potent greenhouse gas) turnovers in mainstream biological nitrogen removal (BNR) process remain unclear. This work therefore aimed to fill such knowledge gap by conducting both long-term and batch tests. After over 100 days of feeding with wastewater containing polyethylene terephthalate (PET) microplastics (0-500 μg/L), the long-term results showed that both production and reduction of N2O during denitrification were reduced, as well as the N2O production during nitrification. Accordingly, 60% reduction in N2O accumulation and 70% reduction in N2O production were observed in the denitrification and nitrification batch tests, respectively. Nevertheless, the long-term N2O emission factors under PET microplastics stress were comparable to that in the control reactor, mainly because PET microplastics led to more nitrite accumulation in anoxic period. With the aid of online N2O sensors and site-preference analysis, it was demonstrated that the heterotrophic bacteria pathway and ammonia oxidizing bacteria denitrification pathway for N2O production were negatively affected by PET microplastics, whereas a clear increase in the contribution of hydroxylamine pathway (+ 22.9%) was observed. Further investigation revealed that PET microplastics even at environmental level (i.e. 10 μg/L) significantly reshaped the BNR sludge characteristics (e.g. much larger particle size) and microbial communities (e.g. Thauera, Rhodobacte and Nitrospira) as well as the nitrogen metabolism pathways, which were chiefly responsible for the changes of N2O turnovers and N2O production pathways under the PET microplastics stress.
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