RT info:eu-repo/semantics/article
T1 Subcritical water as hydrolytic medium to recover and fractionate the protein fraction and phenolic compounds from craft brewer’s spent grain
A1 Alonso Riaño, Patricia
A1 Sanz Díez, Mª Teresa
A1 Benito Román, Oscar
A1 Beltrán Calvo, Sagrario
A1 Trigueros Andrés, Ester
K1 Subcritical water extraction
K1 Biorefinery
K1 Breweŕs spent grain
K1 Protein
K1 Amino acids
K1 Individual phenolic compounds
K1 Antioxidant capacity
K1 Ingeniería química
K1 Chemical engineering
K1 Alimentos
K1 Food
AB The valorization of the brewer’s spent grain (BSG) generated in a craft beer industry was studied by subcritical water hydrolysis in a semi-continuous fixed-bed reactor. Temperature was varied from 125 to 185 °C at a constant flow rate of 4 mL/min. Biomass hydrolysis yielded a maximum of 78% of solubilized protein at 185 °C. Free amino acids presented a maximum level at 160 °C with a value of 55 mg free amino acids/gprotein-BSG. Polar amino acid presented a maximum at lower temperatures than non-polar amino acids. The maximum in total phenolic compounds was reached at 185 °C. This maximum is the same for aldehyde phenolic compounds such as vanillin, syringic and protocatechuic aldehyde; however, for hydroxycinnamic acids, such as ferulic acid and p-coumaric, the maximum was obtained at 160 °C. This allows a fractionation of the bioactive compounds. Subcritical water addresses opportunities for small breweries to be incorporated within the biorefinery concept.
PB Elsevier
SN 0308-8146
YR 2021
FD 2021-07
LK http://hdl.handle.net/10259/5672
UL http://hdl.handle.net/10259/5672
LA eng
NO Agencia Estatal de Investigación [grant number PID2019-104950RB-I00 / AEI / 10.13039/501100011033] and the Junta de Castilla y León (JCyL) and the European Regional Development Fund (ERDF) [grant numbers BU301P18 and BU050P20]
DS Repositorio Institucional de la Universidad de Burgos
RD 20-abr-2024