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Optimization of coagulation process and its influence on membrane fouling for Anaerobic-Anoxic-Oxic-Anoxic Membrane Bioreactor (A2OA-MBR).

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Title: Optimization of coagulation process and its influence on membrane fouling for Anaerobic-Anoxic-Oxic-Anoxic Membrane Bioreactor (A2OA-MBR).
Authors: Tan, Xiaoping1 (AUTHOR), Kuang, Ke1 (AUTHOR), Li, Jie1 (AUTHOR), Lai, Caijing2 (AUTHOR), Chen, Zebin1 (AUTHOR), Wang, Ziyuan1 (AUTHOR), Song, Wei2 (AUTHOR), Wu, Yi3 (AUTHOR), Lin, Dachao2 (AUTHOR) dachiu_lam@foxmail.com, Du, Xing2 (AUTHOR) hitduxing@163.com
Source: Journal of Environmental Sciences (Elsevier). Nov2025, Vol. 157, p756-768. 13p.
Subject Terms: *Coagulation (Sewage purification), *Sewage purification, *Wastewater treatment, *Chemical oxygen demand, Hollow fibers, Coagulants
Abstract: As part of sewage treatment, coagulation could remove phosphorus from the effluent of the Anaerobic-Anoxic-Oxic-Anoxic (A2OA) biological process. The importance in investigating the influence of coagulation on Anaerobic-Anoxic-Oxic-Anoxic Membrane Bioreactor (A2OA-MBR) should be emphasized. In this study, systematic optimization of coagulation parameters for greater pollutant removal was conducted in terms of coagulant dosage, coagulation residence time and stirring hydraulic conditions. Coagulation process could remarkably remove turbidity, phosphorus, chemical oxygen demand, humic-like, protein-like and polysaccharide-like substances from secondary effluent and A2OA sludge-liquid mixture. Furthermore, the influence of coagulation on membrane fouling development during the ultrafiltration of secondary effluent and A2OA sludge-liquid mixture was investigated based on optimum coagulation parameters. Coagulation simultaneously reduced reversible membrane fouling and the irreversible one by 86 % and 16 %, respectively. According to excitation-emission matrix and attenuated total reflection-fourier transform infrared spectra, membrane fouling was primarily influenced by the cake layer, although pore fouling might be aggravated by A2OA processes. Besides, the feasibility of coagulation-assisted A2OA-MBR was also assessed using hollow fiber membranes. It exhibited excellent potential in alleviating membrane fouling, while regular cleaning twice a day was not enough to suppress transmembrane pressure increase during direct domestic wastewater ultrafiltration. Additionally, both polysaccharide-like and protein-like foulants were vital components for membrane fouling during wastewater treatment. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Journal of Environmental Sciences (Elsevier) is the property of Elsevier B.V. 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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  Data: Optimization of coagulation process and its influence on membrane fouling for Anaerobic-Anoxic-Oxic-Anoxic Membrane Bioreactor (A2OA-MBR).
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  Data: <searchLink fieldCode="AR" term="%22Tan%2C+Xiaoping%22">Tan, Xiaoping</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kuang%2C+Ke%22">Kuang, Ke</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Jie%22">Li, Jie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lai%2C+Caijing%22">Lai, Caijing</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Zebin%22">Chen, Zebin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Ziyuan%22">Wang, Ziyuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Wei%22">Song, Wei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Yi%22">Wu, Yi</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lin%2C+Dachao%22">Lin, Dachao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> dachiu_lam@foxmail.com</i><br /><searchLink fieldCode="AR" term="%22Du%2C+Xing%22">Du, Xing</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> hitduxing@163.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Environmental+Sciences+%28Elsevier%29%22">Journal of Environmental Sciences (Elsevier)</searchLink>. Nov2025, Vol. 157, p756-768. 13p.
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  Data: *<searchLink fieldCode="DE" term="%22Coagulation+%28Sewage+purification%29%22">Coagulation (Sewage purification)</searchLink><br />*<searchLink fieldCode="DE" term="%22Sewage+purification%22">Sewage purification</searchLink><br />*<searchLink fieldCode="DE" term="%22Wastewater+treatment%22">Wastewater treatment</searchLink><br />*<searchLink fieldCode="DE" term="%22Chemical+oxygen+demand%22">Chemical oxygen demand</searchLink><br /><searchLink fieldCode="DE" term="%22Hollow+fibers%22">Hollow fibers</searchLink><br /><searchLink fieldCode="DE" term="%22Coagulants%22">Coagulants</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: As part of sewage treatment, coagulation could remove phosphorus from the effluent of the Anaerobic-Anoxic-Oxic-Anoxic (A2OA) biological process. The importance in investigating the influence of coagulation on Anaerobic-Anoxic-Oxic-Anoxic Membrane Bioreactor (A2OA-MBR) should be emphasized. In this study, systematic optimization of coagulation parameters for greater pollutant removal was conducted in terms of coagulant dosage, coagulation residence time and stirring hydraulic conditions. Coagulation process could remarkably remove turbidity, phosphorus, chemical oxygen demand, humic-like, protein-like and polysaccharide-like substances from secondary effluent and A2OA sludge-liquid mixture. Furthermore, the influence of coagulation on membrane fouling development during the ultrafiltration of secondary effluent and A2OA sludge-liquid mixture was investigated based on optimum coagulation parameters. Coagulation simultaneously reduced reversible membrane fouling and the irreversible one by 86 % and 16 %, respectively. According to excitation-emission matrix and attenuated total reflection-fourier transform infrared spectra, membrane fouling was primarily influenced by the cake layer, although pore fouling might be aggravated by A2OA processes. Besides, the feasibility of coagulation-assisted A2OA-MBR was also assessed using hollow fiber membranes. It exhibited excellent potential in alleviating membrane fouling, while regular cleaning twice a day was not enough to suppress transmembrane pressure increase during direct domestic wastewater ultrafiltration. Additionally, both polysaccharide-like and protein-like foulants were vital components for membrane fouling during wastewater treatment. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Environmental Sciences (Elsevier) is the property of Elsevier B.V. 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:
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      – Type: doi
        Value: 10.1016/j.jes.2024.12.006
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 756
    Subjects:
      – SubjectFull: Coagulation (Sewage purification)
        Type: general
      – SubjectFull: Sewage purification
        Type: general
      – SubjectFull: Wastewater treatment
        Type: general
      – SubjectFull: Chemical oxygen demand
        Type: general
      – SubjectFull: Hollow fibers
        Type: general
      – SubjectFull: Coagulants
        Type: general
    Titles:
      – TitleFull: Optimization of coagulation process and its influence on membrane fouling for Anaerobic-Anoxic-Oxic-Anoxic Membrane Bioreactor (A2OA-MBR).
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            NameFull: Tan, Xiaoping
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            NameFull: Kuang, Ke
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            – D: 01
              M: 11
              Text: Nov2025
              Type: published
              Y: 2025
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