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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/6282

    Título
    Kinetic study of the semi-continuous extraction/hydrolysis of the protein and polysaccharide fraction of the industrial solid residue from red macroalgae by subcritical water
    Autor
    Trigueros Andrés, EsterUBU authority Orcid
    Alonso Riaño, PatriciaUBU authority Orcid
    Ramos Rodríguez, CiprianoUBU authority Orcid
    Diop, Cherif Ibrahima KhalilUBU authority Orcid
    Beltrán Calvo, SagrarioUBU authority Orcid
    Sanz Díez, Mª TeresaUBU authority Orcid
    Publicado en
    Journal of Environmental Chemical Engineering. 2021, V. 9, n. 6, 106768
    Editorial
    Elsevier
    Fecha de publicación
    2021-12
    ISSN
    2213-3437
    DOI
    10.1016/j.jece.2021.106768
    Abstract
    The valorization of the underexploited solid residue after agar extraction from red marine algae was studied by subcritical water treatment. Experiments were carried out in two different semi-continuous fix-bed reactor configurations at 185 ºC at different subcritical water residence times. The use of a by-pass section allowed to heat the water previous contact to the biomass, avoiding the exposure of the sample to high temperatures during the heating procedure and reducing the formation of degradation products. Higher hydrolysis yields were obtained for the protein fraction (reaching 96.1%) than for the carbohydrate fraction (reaching 45.7%, 11.3%, 27.5% and 57.6% for galactans, glucans, arabinans and uronic acids, respectively). With the decrease of the residence time, by increasing the flow rate, higher initial hydrolysis rates were obtained due to enhancing diffusion of the hydrolysis products into the bulk solution. It was determined a similar dependence of the initial hydrolysis rates on the residence time for the carbohydrate oligomers and total protein fraction, but the release of free amino acids was less dependent on increasing flow rate due to higher diffusion coefficients for small molecules.
    Palabras clave
    Subcritical water hydrolysis (subW)
    Heating
    Residence time
    Biorefinery
    Macroalgae by-products
    Bio compounds
    Materia
    Ingeniería química
    Chemical engineering
    URI
    http://hdl.handle.net/10259/6282
    Versión del editor
    https://doi.org/10.1016/j.jece.2021.106768
    Collections
    • Artículos BIOIND
    Atribución 4.0 Internacional
    Documento(s) sujeto(s) a una licencia Creative Commons Atribución 4.0 Internacional
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