2026-04-20T11:35:20Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/55372021-11-02T12:02:27Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4569

Sanz Díez, Mª Teresa 530 500 Alonso Riaño, Patricia aad9756c-ad87-4f31-ba02-459668ce3469 500 Trigueros Andrés, Ester 557 500 Kashaninejad, Mansoore 19b83798-8191-4640-90af-544afd7ca648 500 Aymara Caiza, Daysi M. 2f7015ed-d35a-460b-a556-dda8e56405f1 500 Benito Román, Oscar 59 500 0000-0002-4418-0045 Ruiz Pérez, María Olga 503 500 Escudero Barbero, Isabel 161 500 Benito Román, Oscar 59 500 0000-0002-4418-0045 Beltrán Calvo, Sagrario 57 500 2020-10-29T12:07:44Z 2020-10-29T12:07:44Z 2020 http://hdl.handle.net/10259/5537 Póster presentado en: 1er Encuentro Ibérico de Fluidos Supercríticos/1º Encontro Ibérico de Fluidos Supercríticos. 2020, 18-19 de febrero, Santiago de Compostela The biorefinery concept involves the valorization and conversion of biomass into different bioproducts, including energy, materials and chemicals that can replace products derived from fossil carbon sources. The integral valorization of biomass requires the extraction and fractionation of the different constituents thereof, extractables, lipids, proteins and structural components such as cellulose, hemicellulose and lignin. In this work, the use of emerging and clean technologies for the integral valorization of different types of biomass is proposed. First, the use supercritical CO2 (SCCO2) extraction is proposed for recovering the lipid fraction and ultrasonic assisted extraction to recover the hydrophilic fraction, to subsequently perform a fractionation and hydrolysis of the residual biomass using pressurized liquid water. Several types of biomass are being studied, both second and third generation. Among second generation biomass, the brewery spent grain (BSG), which accounts for 85% of the by-products generated in beer processing [1], has been selected as case study of this communication. The extraction of the lipid fraction with SCCO2 has been carried out in a 26.5 mL capacity extractor at different pressures (20-40 MPa) and temperatures (40-80 °C). The lipid fraction obtained has been characterized by determining its lipid profile and antioxidant capacity. The experiments of fractionation and hydrolysis in subcritical water (scW) have been carried out in a semi-continuous reactor, varying the extraction temperature. The different fractions obtained have been characterized by HPLC with two series detectors, UVD and RID, to determine the content in monomeric sugars and oligomers. Protein, free amino acids, total polyphenols and total organic carbon have been also determined. The composition of the BSG according to the biomass characterization protocols of NREL [2] was 21.1 % arabinoxylans, 25.6 % glucanes, 5.1 % soluble lignin, 10.5 % insoluble lignin, 1.2 % ashes, 16.7 % proteins, 5.6 % lipids and 14.4 % extractables. Worth noting the presence of insoluble lignin as well as the high content of arabinoxylans and glucanes, 10% of which were residual starch. The extraction curves obtained when studying the extraction of the lipid fraction of BSG with SCCO2, showed that the extraction rate and the extraction yield increased with increasing temperature and pressure, with the major fatty acid being linoleic acid. Regarding fractionation of the carbohydrate fraction, we have observed that, as temperature increases, hydrolysis increases. Figure 1a shows the sugars yield, including monomeric sugars and oligomers. Degradation of sugars due to the high residence times produces acids (Fig. 1b), hydroxymethylfurfural (HMF) and furfural (Fig. 1c). The treatment of biomass by scW, allows also recovering the entire protein fraction by increasing the temperature up to around 185ºC. In addition, partial hydrolysis of the protein fraction occurs, obtaining as major free aminoacids valine, aspartic acid, alanine and glycine. We can conclude that the fractionation of BSG through emerging and clean technologies allows an integral recovery of BSG, obtaining extracts with high antioxidant capacity. Pressurized water hydrolysis allows the recovery and fractionation of the carbohydrate and protein fraction. JCyL and ERDF for financial support of project BU301P18. To Hiperbaric, S.A. for financial support of Project BIOLIGNO. application/pdf eng Ingeniería química Chemical engineering Integral valorization of agro-food biomass through pressurized fluids. Case study: Brewery Spent Grain (BSG) info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/acceptedVersion info:eu-repo/semantics/openAccess info:eu-repo/grantAgreement/JCyL/BU301P18 ORIGINAL Integral_valorization_of_agro-food.pdf Integral_valorization_of_agro-food.pdf application/pdf 421868 https://riubu.ubu.es/bitstream/10259/5537/1/Integral_valorization_of_agro-food.pdf 8490ed260565ee89714da1d42ce70df4 MD5 1 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/5537/2/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 2 THUMBNAIL Integral_valorization_of_agro-food.pdf.jpg Integral_valorization_of_agro-food.pdf.jpg IM Thumbnail image/jpeg 6264 https://riubu.ubu.es/bitstream/10259/5537/3/Integral_valorization_of_agro-food.pdf.jpg ef71d00a18d7f0470980ef3bf3e98457 MD5 3 TEXT Integral_valorization_of_agro-food.pdf.txt Integral_valorization_of_agro-food.pdf.txt Extracted text text/plain 4817 https://riubu.ubu.es/bitstream/10259/5537/4/Integral_valorization_of_agro-food.pdf.txt d48ffd643b417fa090971ffd46f1b2c2 MD5 4 10259/5537 oai:riubu.ubu.es:10259/5537 2021-11-02 13:02:27.224 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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