Microwave Assisted Liquefaction with Crude Glycerol as a Potential Method of Brewer’s Spent Grain Utilization

Abstract

Abstract. Brewer's spent grain was applied as a low-cost industrial type of lignocellulose biomass in a liquefaction process with crude glycerol. Influence of the reaction time and solvent:biomass ratio on the efficiency of the process, chemical structure and basic properties of obtained biopolyols was analyzed. Spectroscopic studies of the prepared polyols and solid residues shed light on the biomass degradation mechanism through application of microwaves and further reaction of degradation products with solvent particles.

More than just a beer—the potential applications of by-products from beer manufacturing in polymer technology

“…Nevertheless, to the best of our knowledge, there are no literature works reporting the application of BSG-originated phenolics in polymer materials. work [159], we used the brewers' spent grain as a biomass feedstock for crude glycerol-based microwave liquefaction aimed at manufacturing biopolyols for polyurethanes. The general scheme of the process is presented in Fig.…”

“…Fig. 5 The general scheme of microwave-assisted liquefaction of BSG resulting in biopolyol for polyurethanes [159] Fig. 6 The appearance of BSG without additional treatment A very interesting application of BSG in polymer technology was also presented by Ferreira et al [170], who used it to prepare disposable trays for food packaging.…”