IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v19y2022i21p14610-d965683.html
   My bibliography  Save this article

Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants

Author

Listed:
  • Jinxia Zhou

    (State Key Laboratory of Pulp and Paper Engineering, South China University of Technology (SCUT), Guangzhou 510640, China
    These authors contributed equally to this work.)

  • Yunlu Jia

    (State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
    These authors contributed equally to this work.)

  • Xiaobei Gong

    (State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China)

  • Hao Liu

    (State Key Laboratory of Pulp and Paper Engineering, South China University of Technology (SCUT), Guangzhou 510640, China
    Bengbu-SCUT Research Center for Advanced Manufacturing of Biomaterials, Bengbu 233010, China)

  • Chengwu Sun

    (Bengbu-SCUT Research Center for Advanced Manufacturing of Biomaterials, Bengbu 233010, China)

Abstract

Time-resolved monitoring of microalgae agglomeration facilitates screening of coagulants/flocculants (CFs) from numerous biopolymer candidates. Herein, a filtering-flowing analysis (FFA) apparatus was developed in which dispersed microalgal cells were separated from coagulates and flocs formed by CFs and pumped into spectrophotometer for real-time quantification. Polysaccharides-based CFs for Microcystis aeruginosa and several other microalgae were tested. Cationic hydroxyethyl cellulose (CHEC), chitosan quaternary ammonium (CQA) and cationic guar gum (CGG) all triggered coagulation obeying a pseudo-second-order model. Maximal coagulation efficiencies were achieved at their respective critical dosages, i.e., 0.086 g/g M.a. CHEC, 0.022 g/g M.a. CQA, and 0.216 g/g M.a. CGG. Although not active independently, bacterial exopolysaccharides (BEPS) aided coagulation of M. aeruginosa and allowed near 100% flocculation efficiency when 0.115 g/g M.a. CQA and 1.44 g/g M.a. xanthan were applied simultaneously. The apparatus is applicable to other microalgae species including Spirulina platensis , S. maxima , Chlorella vulgaris and Isochrysis galbana . Bio-based CFs sorted out using this apparatus could help develop cleaner processes for both remediation of harmful cyanobacterial blooms and microalgae-based biorefineries.

Suggested Citation

  • Jinxia Zhou & Yunlu Jia & Xiaobei Gong & Hao Liu & Chengwu Sun, 2022. "Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants," IJERPH, MDPI, vol. 19(21), pages 1-11, November.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:21:p:14610-:d:965683
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/19/21/14610/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1660-4601/19/21/14610/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jijerp:v:19:y:2022:i:21:p:14610-:d:965683. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.