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
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
Patrocinador
Comisión Nacional de Energía Atómica, Gobierno de Argentina
Version del Editor
Propietario de los Derechos
© 2025 The Author(s)
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
Aparece en las colecciones
Dateien zu dieser Ressource
Tamaño:
826.3Kb
Formato:
Adobe PDF
