Articles producció científica> Enginyeria Química

Biofilm model development and process analysis of anaerobic bio-digestion of azo dyes

  • Identification data

    Identifier: imarina:9287475
    Authors:
    Amin MSAMozumder MSIStüber FGiralt JFortuny AFabregat AFont J
    Abstract:
    Ceramic-supported graphene oxide membrane bioreactors have already shown their potential for the anaerobic decolorization of wastewater containing azo dyes. The primary goal of this investigation was to develop a mathematical model that would be able to describe the steady-state behavior of this biodegradation process. The developed model was calibrated and validated using independent experimental data sets with various dye structure, feed concentration, hydraulic retention time (HRT), and support materials on which the biofilm was grown. The calibrated and validated model was used to analyze the intrinsic mechanism of the process and the main finding was that hydrolysis is the rate limiting step. Hydrolysis rate constant is decreased with increasing the complexity of the dye structure. Support materials with high electron transfer capacity increased the biofilm activity, therefore, increased the hydrolysis rate constant. Acetate concentration, used as an external carbon source, improved the dye removal efficiency. However, acetate to dye ratio did not have a direct relation to dye removal efficiency. Higher hydraulic retention time (HRT) increased the contact time between dye molecules and biofilm and enhanced the dye removal efficiency, too. However, it is essential to impose the right balance between HRT and external carbon sources to make the process feasible.
  • Others:

    Author, as appears in the article.: Amin MSA; Mozumder MSI; Stüber F; Giralt J; Fortuny A; Fabregat A; Font J
    Department: Enginyeria Química
    URV's Author/s: Fabregat Llangostera, Azael / Font Capafons, José / Fortuny Sanromà, Agustín / Giralt Marcé, Jaume / Stüber, Frank Erich
    Keywords: Model simulation Hydrolysis Biofilm Azo dyes Anaerobic bio-digestion
    Abstract: Ceramic-supported graphene oxide membrane bioreactors have already shown their potential for the anaerobic decolorization of wastewater containing azo dyes. The primary goal of this investigation was to develop a mathematical model that would be able to describe the steady-state behavior of this biodegradation process. The developed model was calibrated and validated using independent experimental data sets with various dye structure, feed concentration, hydraulic retention time (HRT), and support materials on which the biofilm was grown. The calibrated and validated model was used to analyze the intrinsic mechanism of the process and the main finding was that hydrolysis is the rate limiting step. Hydrolysis rate constant is decreased with increasing the complexity of the dye structure. Support materials with high electron transfer capacity increased the biofilm activity, therefore, increased the hydrolysis rate constant. Acetate concentration, used as an external carbon source, improved the dye removal efficiency. However, acetate to dye ratio did not have a direct relation to dye removal efficiency. Higher hydraulic retention time (HRT) increased the contact time between dye molecules and biofilm and enhanced the dye removal efficiency, too. However, it is essential to impose the right balance between HRT and external carbon sources to make the process feasible.
    Thematic Areas: Soil science Plant science Geociências General environmental science Environmental sciences Environmental science (miscellaneous) Environmental science (all) Engineering, environmental Biotechnology & applied microbiology Biodiversidade
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: jaume.giralt@urv.cat agustin.fortuny@urv.cat frankerich.stuber@urv.cat afabrega@urv.cat jose.font@urv.cat
    Author identifier: 0000-0001-5917-8741 0000-0001-9424-1400 0000-0002-5525-5401 0000-0002-4007-7905
    Record's date: 2024-08-03
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/pii/S2352186422003856
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Environmental Technology & Innovation. 29
    APA: Amin MSA; Mozumder MSI; Stüber F; Giralt J; Fortuny A; Fabregat A; Font J (2023). Biofilm model development and process analysis of anaerobic bio-digestion of azo dyes. Environmental Technology & Innovation, 29(), -. DOI: 10.1016/j.eti.2022.102962
    Article's DOI: 10.1016/j.eti.2022.102962
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2023
    Publication Type: Journal Publications
  • Keywords:

    Biotechnology & Applied Microbiology,Engineering, Environmental,Environmental Science (Miscellaneous),Environmental Sciences,Plant Science,Soil Science
    Model simulation
    Hydrolysis
    Biofilm
    Azo dyes
    Anaerobic bio-digestion
    Soil science
    Plant science
    Geociências
    General environmental science
    Environmental sciences
    Environmental science (miscellaneous)
    Environmental science (all)
    Engineering, environmental
    Biotechnology & applied microbiology
    Biodiversidade
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