2026-04-20T12:58:22Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/62822022-12-02T13:08:56Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245
Repositorio Institucional de la Universidad de Burgos
author
Trigueros Andrés, Ester
author
Alonso Riaño, Patricia
author
Ramos Rodríguez, Cipriano
author
Diop, Cherif Ibrahima Khalil
author
Beltrán Calvo, Sagrario
author
Sanz Díez, Mª Teresa
2021-12-13T15:18:11Z
2021-12-13T15:18:11Z
2021-12
2213-3437
http://hdl.handle.net/10259/6282
10.1016/j.jece.2021.106768
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.
eng
Atribución 4.0 Internacional
Subcritical water hydrolysis (subW)
Heating
Residence time
Biorefinery
Macroalgae by-products
Bio compounds
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
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/6282/1/Trigueros-jece_2021.pdf
File
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Trigueros-jece_2021.pdf