Applying Subcritical Water Extraction to Obtain Bioactive Compounds and Cellulose Fibers from Brewer Spent Grains.

ABSTRACT: Of the three types of waste generated in beer processing, brewer's spent grain (BSG) is the most abundant and has a high potential for valorization. In this work, defatted BSG (DB) was subjected to an extraction process with subcritical water at different temperatures to obtain extracts rich in phenols and the cellulosic fractions, which were also purified by using hydrogen peroxide (H₂O₂). The results showed that the dry extracts obtained at 170 °C were richer in phenolics (24 mg Gallic Acid Equivalent (GAE) g^-1 DB), but with lower antioxidant capacity (71 mg DB·mg^-1 2,2-diphenyl-1-pikryl-hydrazyl). This extract also showed the highest antibacterial potential against L. innocua (80 mg·mL^-1) and E. coli (140 mg·mL^-1<

SUBMITTER: Gomez-Contreras PA 

PROVIDER: S-EPMC11510227 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature