Aproveitamento de resíduo cervejeiro - bagaço de malte: uma revisão

Abstract

Brewer's Spent Grain (BSG) is a byproduct produced in massive quantities by the brewing industry. It contains significant amounts of nutrients, such as fiber, proteins, and bioactive compounds. Generally, BSG is disposed of in landfills and/or composted, however, it has great potential to be using in new products. This review aims to analyze, through a bibliographic study covering the last 15 years, the use of brewing industry byproduct in various applications. The Web of Science platform was used to conduct the literature review, applying selected keywords and specific filters. Additionally, Google Scholar was used to complement the search. A total of 397 articles were found, and charts were generated based on the applied filters using the platform’s tools. From these articles, a refinement was conducted to identify the main applications of BSG, which include animal feed, human food, compound extraction, and energy generation. Moreover, BSG has also been explored to produce thermoplastic composites and fiber-based panels. In animal feed, BSG can be incorporated into the diets of ruminants, pigs, fish, goats, and other animals. The inclusion levels vary, as excessive amounts may negatively impact weight gain. In human food, BSG can be incorporated to meat products, bread, cakes, cookies, snacks, extruded products, and other food formulations. The most suggested addition level was 10% of the total formulation. It is a common consensus among all researchers that BSG is rich in protein, fiber, and bioactive compounds, which can be utilized in the development of new food products and as a nutrient source for animals. Furthermore, its utilization has a positive environmental impact by reducing the amount of waste disposed of in landfills and other ecosystems.