Model-based development of strategies enabling effective enrichment and application of comammox bacteria in floccular sludge under mainstream conditions.
- Publisher:
- ELSEVIER
- Publication Type:
- Journal Article
- Citation:
- Sci Total Environ, 2023, 895, pp. 165051
- Issue Date:
- 2023-10-15
Closed Access
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1-s2.0-S0048969723036744-main.pdf | Published version | 3.64 MB | Adobe PDF |
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Full metadata record
Field | Value | Language |
---|---|---|
dc.contributor.author | Zhu, Y | |
dc.contributor.author | Hou, J | |
dc.contributor.author | Liu, J | |
dc.contributor.author | Huo, P | |
dc.contributor.author | Yang, L | |
dc.contributor.author | Zheng, M | |
dc.contributor.author |
Wei, W https://orcid.org/0000-0001-5613-337X |
|
dc.contributor.author | Ni, B-J | |
dc.contributor.author | Chen, X | |
dc.date.accessioned | 2024-04-10T06:05:09Z | |
dc.date.available | 2023-06-19 | |
dc.date.available | 2024-04-10T06:05:09Z | |
dc.date.issued | 2023-10-15 | |
dc.identifier.citation | Sci Total Environ, 2023, 895, pp. 165051 | |
dc.identifier.issn | 0048-9697 | |
dc.identifier.issn | 1879-1026 | |
dc.identifier.uri | http://hdl.handle.net/10453/177653 | |
dc.description.abstract | The discovery of complete ammonium oxidation (comammox) has redefined the perception of the nitrification process which plays a vital part in biological nitrogen removal (BNR) from wastewater. Despite the reported detection or cultivation of comammox bacteria in biofilm or granular sludge reactors, limited attempts have been made to enrich or assess comammox bacteria in floccular sludge reactors with suspended growth of microbes, which are most extensively applied at wastewater treatment plants. Therefore, through making use of a comammox-inclusive bioprocess model reliably evaluated using batch experimental data with joint contributions of different nitrifying guilds, this work probed into the proliferation and functioning of comammox bacteria in two commonly-used floccular sludge reactor configurations, i.e., continuous stirred tank reactor (CSTR) and sequencing batch reactor (SBR), under mainstream conditions. The results indicated that compared with the studied SBR, the CSTR was observed to favor the enrichment of comammox bacteria through maintaining a sufficient sludge retention time (40-100 d) while avoiding an extremely low DO level (e.g., 0.05 g-O2/m3), irrespective of the varied influent NH4+-N of 10-100 g-N/m3. Meanwhile, the inoculum sludge was found to greatly influence the start-up process of the studied CSTR. By inoculating the CSTR with a sufficient amount of sludge, finally enriched floccular sludge with a high abundance of comammox bacteria (up to 70.5 %) could be rapidly obtained. These results not only benefitted further investigation and application of comammox-inclusive sustainable BNR technologies but also explained, to some extent, the discrepancy in the reported presence and abundance of comammox bacteria at wastewater treatment plants adopting floccular sludge-based BNR technologies. | |
dc.format | Print-Electronic | |
dc.language | eng | |
dc.publisher | ELSEVIER | |
dc.relation | http://purl.org/au-research/grants/arc/DP220101142 | |
dc.relation.ispartof | Sci Total Environ | |
dc.relation.isbasedon | 10.1016/j.scitotenv.2023.165051 | |
dc.rights | info:eu-repo/semantics/closedAccess | |
dc.subject.classification | Environmental Sciences | |
dc.subject.mesh | Sewage | |
dc.subject.mesh | Bioreactors | |
dc.subject.mesh | Wastewater | |
dc.subject.mesh | Nitrification | |
dc.subject.mesh | Bacteria | |
dc.subject.mesh | Nitrogen | |
dc.subject.mesh | Oxidation-Reduction | |
dc.subject.mesh | Ammonia | |
dc.subject.mesh | Bacteria | |
dc.subject.mesh | Nitrogen | |
dc.subject.mesh | Ammonia | |
dc.subject.mesh | Bioreactors | |
dc.subject.mesh | Sewage | |
dc.subject.mesh | Oxidation-Reduction | |
dc.subject.mesh | Nitrification | |
dc.subject.mesh | Wastewater | |
dc.subject.mesh | Sewage | |
dc.subject.mesh | Bioreactors | |
dc.subject.mesh | Wastewater | |
dc.subject.mesh | Nitrification | |
dc.subject.mesh | Bacteria | |
dc.subject.mesh | Nitrogen | |
dc.subject.mesh | Oxidation-Reduction | |
dc.subject.mesh | Ammonia | |
dc.title | Model-based development of strategies enabling effective enrichment and application of comammox bacteria in floccular sludge under mainstream conditions. | |
dc.type | Journal Article | |
utslib.citation.volume | 895 | |
utslib.location.activity | Netherlands | |
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 | 2024-04-10T06:05:07Z | |
pubs.publication-status | Published | |
pubs.volume | 895 |
Abstract:
The discovery of complete ammonium oxidation (comammox) has redefined the perception of the nitrification process which plays a vital part in biological nitrogen removal (BNR) from wastewater. Despite the reported detection or cultivation of comammox bacteria in biofilm or granular sludge reactors, limited attempts have been made to enrich or assess comammox bacteria in floccular sludge reactors with suspended growth of microbes, which are most extensively applied at wastewater treatment plants. Therefore, through making use of a comammox-inclusive bioprocess model reliably evaluated using batch experimental data with joint contributions of different nitrifying guilds, this work probed into the proliferation and functioning of comammox bacteria in two commonly-used floccular sludge reactor configurations, i.e., continuous stirred tank reactor (CSTR) and sequencing batch reactor (SBR), under mainstream conditions. The results indicated that compared with the studied SBR, the CSTR was observed to favor the enrichment of comammox bacteria through maintaining a sufficient sludge retention time (40-100 d) while avoiding an extremely low DO level (e.g., 0.05 g-O2/m3), irrespective of the varied influent NH4+-N of 10-100 g-N/m3. Meanwhile, the inoculum sludge was found to greatly influence the start-up process of the studied CSTR. By inoculating the CSTR with a sufficient amount of sludge, finally enriched floccular sludge with a high abundance of comammox bacteria (up to 70.5 %) could be rapidly obtained. These results not only benefitted further investigation and application of comammox-inclusive sustainable BNR technologies but also explained, to some extent, the discrepancy in the reported presence and abundance of comammox bacteria at wastewater treatment plants adopting floccular sludge-based BNR technologies.
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