Levantamento sistemático da utilização do bagaço de malte para bioprocessos

Abstract

The growing demand for sustainable solutions has encouraged the utilization of agro-industrial residues such as brewer's spent grain (BSG), the main by-product of beer production, whose inadequate disposal represents a signifi cant environmental liability - Brazil generates approximately 2 million tons of this residue annually. This study conducted a systematic literature review on the application of BSG in bioprocesses, identifying its potential as a raw material for biofuels, enzymes, bioplastics, and organic acids. Through a structured search in scientifi c databases, it was found that the residue has been primarily used in the production of bioethanol, biogas, xylanases, and cellulases, with pretreatments such as acid and enzymatic hydrolysis being essential to release fermentable sugars. The results also point to challenges such as material heterogeneity and processing costs, although BSG demonstrates viability as a versatile substrate to boost the circular bioeconomy.