Insight into the granular characteristics and microbial communities of SNDPR in an innovative continuous flow reactor across varying COD concentrations.
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| Title: | Insight into the granular characteristics and microbial communities of SNDPR in an innovative continuous flow reactor across varying COD concentrations. |
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| Authors: | Li, Shuai1 (AUTHOR), Zhang, Sha1 (AUTHOR), Li, Dong1 (AUTHOR) lidong2006@bjut.edu.cn, Zeng, Huiping1 (AUTHOR), Yuan, Yixing2 (AUTHOR), Zhang, Jie1,2 (AUTHOR) |
| Source: | Environmental Technology. Apr2026, Vol. 47 Issue 10, p1599-1612. 14p. |
| Subject Terms: | *Chemical oxygen demand, *Biological nutrient removal, *Energy consumption, *Microbial communities, Filamentous bacteria, Tubular reactors, Microbial aggregation |
| Abstract: | The purpose of this study was to investigate the effects of COD interference on biological nutrient removal, granule characteristics, and microbial community dynamics in continuous-flow Simultaneous Nitrification, Denitrification, and phosphorus Removal (SNDPR) granular sludge under low aeration energy consumption conditions. The experiment employed an innovative Automatic Internal Circulation Continuous Flow Reactor (AIC-CFR) at an aeration rate of 0.8 L/min, maintaining the dissolved oxygen level below 0.5 mg/L, and the COD concentration increased from 300 to 500 mg/L in steps of 100 mg/L. The results demonstrated that increasing the COD concentration to 400 mg/L significantly enhanced the removal efficiencies of total phosphorus and total nitrogen, while simultaneously optimizing the settling properties of the granules. However, when the COD concentration reached 500 mg/L, the settling ability and stability of the granules deteriorated. As the COD concentration increased, the population of the filamentous archaea Methanothrix significantly increased, whereas the abundance of the filamentous bacteria Thiothrix gradually decreased. The abundance of these filamentous microorganisms was closely correlated with the sludge volume index, granular integrity coefficient, and extracellular polymeric substances. High-throughput sequencing results revealed that DPAOs-Pseudomonas have consistently been the absolute dominant genus in the system. It is AOA rather than AOB that undertakes the task of oxidizing ammonia nitrogen to nitrous nitrogen. Finally, a granular ecological conceptual model is proposed to elucidate the underlying mechanisms of the AIC-CFR system. This study elucidated the stability mechanism of SNDPR granules, providing technical support for the low-carbon engineering operation of granular sludge. [ABSTRACT FROM AUTHOR] |
| Copyright of Environmental Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 193084083 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Insight into the granular characteristics and microbial communities of SNDPR in an innovative continuous flow reactor across varying COD concentrations. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Li%2C+Shuai%22">Li, Shuai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Sha%22">Zhang, Sha</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Dong%22">Li, Dong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lidong2006@bjut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zeng%2C+Huiping%22">Zeng, Huiping</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yuan%2C+Yixing%22">Yuan, Yixing</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Jie%22">Zhang, Jie</searchLink><relatesTo>1,2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Environmental+Technology%22">Environmental Technology</searchLink>. Apr2026, Vol. 47 Issue 10, p1599-1612. 14p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Chemical+oxygen+demand%22">Chemical oxygen demand</searchLink><br />*<searchLink fieldCode="DE" term="%22Biological+nutrient+removal%22">Biological nutrient removal</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+consumption%22">Energy consumption</searchLink><br />*<searchLink fieldCode="DE" term="%22Microbial+communities%22">Microbial communities</searchLink><br /><searchLink fieldCode="DE" term="%22Filamentous+bacteria%22">Filamentous bacteria</searchLink><br /><searchLink fieldCode="DE" term="%22Tubular+reactors%22">Tubular reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Microbial+aggregation%22">Microbial aggregation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The purpose of this study was to investigate the effects of COD interference on biological nutrient removal, granule characteristics, and microbial community dynamics in continuous-flow Simultaneous Nitrification, Denitrification, and phosphorus Removal (SNDPR) granular sludge under low aeration energy consumption conditions. The experiment employed an innovative Automatic Internal Circulation Continuous Flow Reactor (AIC-CFR) at an aeration rate of 0.8 L/min, maintaining the dissolved oxygen level below 0.5 mg/L, and the COD concentration increased from 300 to 500 mg/L in steps of 100 mg/L. The results demonstrated that increasing the COD concentration to 400 mg/L significantly enhanced the removal efficiencies of total phosphorus and total nitrogen, while simultaneously optimizing the settling properties of the granules. However, when the COD concentration reached 500 mg/L, the settling ability and stability of the granules deteriorated. As the COD concentration increased, the population of the filamentous archaea Methanothrix significantly increased, whereas the abundance of the filamentous bacteria Thiothrix gradually decreased. The abundance of these filamentous microorganisms was closely correlated with the sludge volume index, granular integrity coefficient, and extracellular polymeric substances. High-throughput sequencing results revealed that DPAOs-Pseudomonas have consistently been the absolute dominant genus in the system. It is AOA rather than AOB that undertakes the task of oxidizing ammonia nitrogen to nitrous nitrogen. Finally, a granular ecological conceptual model is proposed to elucidate the underlying mechanisms of the AIC-CFR system. This study elucidated the stability mechanism of SNDPR granules, providing technical support for the low-carbon engineering operation of granular sludge. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Environmental Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/09593330.2026.2621362 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1599 Subjects: – SubjectFull: Chemical oxygen demand Type: general – SubjectFull: Biological nutrient removal Type: general – SubjectFull: Energy consumption Type: general – SubjectFull: Microbial communities Type: general – SubjectFull: Filamentous bacteria Type: general – SubjectFull: Tubular reactors Type: general – SubjectFull: Microbial aggregation Type: general Titles: – TitleFull: Insight into the granular characteristics and microbial communities of SNDPR in an innovative continuous flow reactor across varying COD concentrations. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Li, Shuai – PersonEntity: Name: NameFull: Zhang, Sha – PersonEntity: Name: NameFull: Li, Dong – PersonEntity: Name: NameFull: Zeng, Huiping – PersonEntity: Name: NameFull: Yuan, Yixing – PersonEntity: Name: NameFull: Zhang, Jie IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 04 Text: Apr2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 09593330 Numbering: – Type: volume Value: 47 – Type: issue Value: 10 Titles: – TitleFull: Environmental Technology Type: main |
| ResultId | 1 |
