Room: Poster Area
Date: Friday, 22 May 2026
Time: 13:45 - 14:45 CEST
Session code 4DV.5
Biomass pre-treatment and production of intermediates (part 2)
Multiproduct Brewers’ Spent Grain (BSG) Biorefinery Using Enzyme-based Process and Hydrothermal Pretreatment Technologies
Short Introductive summary
Brewer’s spent grain (BSG), the main by-product of beer production, is a lignocellulosic biomass rich in fibre, proteins, and phenolic compounds, making it a promising feedstock for the production of xylooligosaccharides (XOS) with prebiotic properties. However, its high protein and starch content can hinder hydrothermal processing. This study combines enzymatic destarching and deproteinisation with liquid hot water pretreatment (185 °C) to improve biomass fractionation. The enzymatic treatment increased xylan content and reduced protein levels, enhancing processability. As a result, efficient hemicellulose solubilisation and XOS recovery were achieved, with 51% of the products exhibiting low degrees of polymerisation (DP2–DP5). These findings demonstrate the potential of BSG as a feedstock for XOS production within a biorefinery framework.
Presenter
Maria del Prado GARCIA APARICIO
CIEMAT, Advanced Biofuels and Bioproducts Unit, SPAIN
Presenter's biography
María García-Aparicio is a Tenured Scientist at the Advanced Biofuels and Bioproducts Unit at CIEMAT, with more than 20 years of experience in the valorisation of lignocellulosic biomass and agri-food by-products through enzymatic and microbial biorefinery approaches.
Biographies and Short introductive summaries are supplied directly by presenters and are published here unedited
Co-authors:
C. Álvarez Vaquerizo, CIEMAT, Madrid, SPAIN
A.D. Moreno García, CIEMAT, Madrid, SPAIN
M.d.P. Garcia Aparicio, CIEMAT, Madrid, SPAIN
M.J. Negro Álvarez, CIEMAT, Madrid, SPAIN
Session reference: 4DV.5.17