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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/76984

    Título
    Novel fluidized-bed bioreactors with density-graded carriers for the bioremediation of nitrate in uranium industry effluents
    Autor
    Venturini, Mariano
    Bucci, Paula
    Muñoz Torre, RaúlAutoridad UVA Orcid
    Año del Documento
    2025
    Editorial
    Royal Society of Chemistry
    Descripción
    Producción Científica
    Documento Fuente
    Environmental Science: Water Research and Technology, 2025, vol. 11, n. 5. p. 1339-1351
    Zusammenfassung
    This study presents an innovative bioreactor system that employs density-graded floating carriers to effectively remediate complex uranium-contaminated effluents generated by the nuclear industry. By combining the advantages of fixed-bed and fluidized-bed reactors, our system utilizes floating carriers to create a stratified biofilm environment, optimizing biomass retention and mass transfer. Controlled redox potential (ORP) enhances the removal of uranium and associated contaminants, especially in effluents with high-nitrate concentrations. The fluidized-bed configuration, with a high carrier load, minimizes biofilm-induced clogging, ensuring sustained performance. Carriers were synthesized with acrylate polymers in different compositions: HEMA 50%/0 AA, HEMA 50%/25% AA and HEMA 50%/50% AA w/w to obtain different hydrodynamic properties. The particle terminal velocities and drag coefficients of carriers were 3.14 × 10−6 m s−1, 5 × 10−5 m s−1, and 2 × 10−4 m s−1 and 661 976, 20 734, and 26 221, respectively. The system achieved nitrate and COD removal efficiencies of up to 90% and 84%, respectively, at a hydraulic retention time of 23.9 h and with low energy consumption. The system behaved like a fluidized bed with a high carrier load similar to the PBBR, showing piston flux and variable column fluidization based on carrier densities. Frictions and collisions prevented clogging due to biofilm formation, ensuring sustained performance.
    Materias (normalizadas)
    Water sustainability
    Water impact
    Materias Unesco
    3303.11 Química Industrial
    ISSN
    2053-1400
    Revisión por pares
    SI
    DOI
    10.1039/D5EW00077G
    Patrocinador
    Comisión Nacional de Energía Atómica, Gobierno de Argentina
    Version del Editor
    https://pubs.rsc.org/en/content/articlelanding/2025/ew/d5ew00077g
    Propietario de los Derechos
    © 2025 The Author(s)
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/76984
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP48 - Artículos de revista [271]
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    Novel fluidized-bed bioreactors with density-graded carriers for the bioremediation of nitrate in uranium industry effluents.pdf
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