RT info:eu-repo/semantics/conferenceObject
T1 Biocascade approach to valorize okara by using subcritical water to obtain valuable compounds: scaling up proces
A1 Barea Gómez, Pedro
A1 Illera Gigante, Alba Ester
A1 Melgosa Gómez, Rodrigo
A1 Benito Román, Oscar
A1 Candela Gil, Helena
A1 Beltrán Calvo, Sagrario
A1 Sanz Díez, Mª Teresa
K1 Okara
K1 Subcritical water
K1 Bio-cascade
K1 Protein
K1 Scale-up
AB The use of water under subcritical conditions (subW) for the processing of okara, a by-product ofsoybean beverage production, has promoted advancements in sustainable resource management.A key advantage of using water as a solvent is the elimination of the need for additional chemicals.Industrial okara (Frías Nutrición S.A.U., Burgos, Spain) exhibits a moisture content of 82% w/wand a protein content of 32% w/w. The subW process is environmentally friendly and eliminatesthe need for a drying step, thus reducing energy costs. Various stages have been proposed tofractionate the valuable bioactive compounds of this by-product: (1) extraction of isoflavones at120 °C in a batch reactor and (2) extraction and hydrolysis of proteins from the residual solid athigher temperatures in a semi-continuous reactor. More than 1000 μg isoflavones/g dry okara wasobtained after 30 min at 120 °C, with the genistein family being the most abundant group. Theresidual solid was processed in a 2-liter semicontinuous extractor without drying. A total of 625grams of solid were placed in baskets horizontally. Water flowed at 0.82 L/min, with a residencetime of 2.7 minutes. Two sequential temperatures were tested, 180ºC and 270ºC. At 270ºC,approximately 80% of the protein was hydrolyzed. Very low concentrations of degradationproducts were observed, owing to the short residence time. A medium productivity values of 1.2g protein/Lh was achieved in a semi-continuous plant. SubW treatment is a promising greenchemistry approach for the sustainable valorization of by-products.
YR 2025
FD 2025
LK https://hdl.handle.net/10259/12213
UL https://hdl.handle.net/10259/12213
LA eng
NO Póster presentado en: XVI International Scientific Agriculture Symposium "Agrosym 2025", Jahorina, Bosnia and Herzegovina, October 2-5, 2025
NO This work was supported by the Spanish Research Agency (AEI) [grant number PID2022-136385OB-I00], Junta de Castilla y León (JCyL), and European Regional Development Fund (ERDF) [grant number BU027P23]. A.E. Illera postdoctoral contract was funded by BU027P23. H Candela pre-doctoral contract was funded by JCyL and the European Social Fund [ORDEN EDU/1009/2024]. P. Barea pre-doctoral contract is funded by JCyL and the European Social Fund (ESF) [ORDEN EDU/1868/2022].
DS Repositorio Institucional de la Universidad de Burgos
RD 03-oct-2026