IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v242y2025ics096014812500120x.html
   My bibliography  Save this article

Enhancing anaerobic digestion of waste activated sludge with iron modified tea-based biochar via improving electron transfer and metabolic activity

Author

Listed:
  • Zhao, Zisheng
  • Wu, Hongxin
  • An, Yu
  • Huang, Long
  • Zhang, Guangyi

Abstract

Iron modified biochar (IMBC) derived from the discarded tea leaves was added into waste activated sludge anaerobic digester to improve methane production. Results showed that biochar modified with iron could effectively increase the number of functional groups (e.g., C=O), which contributed to enhancing the electroactivity of the biochar. During anaerobic digestion, IMBC added reactor exhibited highest methane production (145.4 mL/g VS), which was 21.9 % and 9.1 % higher than that in control and BC added reactor, respectively. Mechanisms exploration indicated that the addition of IMBC could significantly enhance the activity of enzyme related to hydrolysis, acidification and methanogenesis, and improve the electron transfer efficiency. Furthermore, the analysis of gene frequency for metabolic pathways (based on the Kyoto Encyclopedia of Genes and Genomes (KEGG)) indicated that genes related to functional metabolism pathways were improved with addition of IMBC. These results demonstrated that IMBC could enhance microbial activity and the expression of related functional genes, thereby improving methane production.

Suggested Citation

  • Zhao, Zisheng & Wu, Hongxin & An, Yu & Huang, Long & Zhang, Guangyi, 2025. "Enhancing anaerobic digestion of waste activated sludge with iron modified tea-based biochar via improving electron transfer and metabolic activity," Renewable Energy, Elsevier, vol. 242(C).
    • Handle: RePEc:eee:renene:v:242:y:2025:i:c:s096014812500120x
    DOI: 10.1016/j.renene.2025.122458
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S096014812500120X
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2025.122458?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    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:eee:renene:v:242:y:2025:i:c:s096014812500120x. 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: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    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.