Aprovechamiento de subproductos de la industria cervecera artesanal como insumo en el proceso de bioconversión

Abstract

Agro-industrial by-products from the brewing and agri-food industries offer significant potential for valorization through sustainable biotechnological processes. This study evaluated the bioconversion of Hermetia illucens larvae using brewers’ spent grain, banana peel, and brewer’s yeast to optimize larval biomass production for protein meal applications. Four substrate formulations were tested, including ground and non-ground treatments, under ambient process conditions, with pH and productive performance monitored throughout the experiment. Process performance was assessed using the Bioconversion Efficiency Ratio (BER), Reduction Rate (RR), Waste Reduction Index (WRI), final biomass yield, and proximate composition. Results indicated that substrate grinding increased residue reduction rates, while final biomass yield was primarily determined by substrate formulation. Mixture B produced the highest biomass yield and protein content (33.16%) and the lowest fat content (7.69%). These findings highlight the importance of substrate formulation in maximizing biomass production and nutritional quality, supporting the technical and economic feasibility of Hermetia illucens-based bioconversion systems. Keywords: Bioconversion; agro-industrial waste; Hermetia illucens; protein