Applications of Brewer’s Spent Grain Hemicelluloses in Biorefineries: Extraction and Value-Added Product Obtention

A circular economy is imperative for environmental sustainability. In this context, biorefineries stand out as a means of production able to reduce the carbon footprint and impact global warming. Biorefineries may employ lignocellulosic biomass from various plant sources produce bioproducts with potential replace fossil derivatives through synthesis by microorganisms without competing food crops. Brewer’s spent grain (BSG), residue brewery process, an option use, being cheap raw material highly available throughout year. The chemical composition quite variable, significant amounts hemicellulose, mainly consisting xylose arabinose monomers that can be technologically converted into value-added products such xylooligosaccharides, xylitol, second-generation ethanol (2G ethanol), biofilms furfural. To end, catalysts are unusual in making increasingly competitive market, selectively optimizing reactions reducing processes these bioproducts. present review addresses primary methods extracting processing hemicelluloses BSG using either biocatalysts (enzymes) or homogenous (acids, alkali, salts) heterogenous (solid acids metal oxide) used pretreat obtain preferred byproducts. state art optimized catalysis mechanisms also presented.