IDEAS home Printed from https://ideas.repec.org/a/gam/jijerp/v19y2022i22p14726-d967627.html
   My bibliography  Save this article

Improved Dewaterability of Waste Activated Sludge by Fe(II)-Activated Potassium Periodate Oxidation

Author

Listed:
  • Hong Xiao

    (College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
    These authors contributed equally to this work.)

  • Qing Liu

    (College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
    These authors contributed equally to this work.)

  • Yingjun Wang

    (College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China)

  • Ying Zhu

    (College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China)

  • Dexin Fang

    (College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China)

  • Ganxue Wu

    (College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China)

  • Zhenxing Zeng

    (College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China)

  • Hong Peng

    (College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China)

Abstract

Fe(II)-activated potassium periodate (KIO 4 ) oxidation was used to improve the dewaterability of waste-activated sludge for the first time. Compared with those of raw sludge, the capillary suction time (CST), specific resistance filtration (SRF), and water content of filter cake (W C ) of sludge treated using the Fe(II)/KIO 4 process under the optimal conditions (i.e., the initial pH = 6.8, KIO 4 dose = 1.4 mmol/g volatile suspended solids, Fe(II)/KIO 4 molar ratio = 1.2) decreased by 64.34%, 84.13%, and 6.69%, respectively. For conditioned sludge flocs, the Zeta potential and particle size were increased, and hydrophilic proteins in extracellular polymeric substances (EPS) were partly degraded, accompanied by the transformation of tightly bound EPS into soluble EPS and the conversion of dense sludge flocs into loose and porous ones. During Fe(II)/KIO 4 oxidation, Fe(IV) and the accompanying • OH were determined as the predominant reactive species and the underlying mechanism of sludge EPS degradation was proposed. This work provides a prospective method for conditioning the sludge dewaterability.

Suggested Citation

  • Hong Xiao & Qing Liu & Yingjun Wang & Ying Zhu & Dexin Fang & Ganxue Wu & Zhenxing Zeng & Hong Peng, 2022. "Improved Dewaterability of Waste Activated Sludge by Fe(II)-Activated Potassium Periodate Oxidation," IJERPH, MDPI, vol. 19(22), pages 1-16, November.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:22:p:14726-:d:967627
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1660-4601/19/22/14726/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1660-4601/19/22/14726/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Tomasz Kamizela & Małgorzata Worwąg & Mariusz Kowalczyk, 2023. "Environmentally Safe Method for Conditioning and Dewatering Sewage Sludge Using Iron Coagulant, Cellulose and Perlite," Energies, MDPI, vol. 17(1), pages 1-21, December.

    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:22:p:14726-:d:967627. 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.