brewer’s spent grain

The main indicators of the filtration drying process of barley brewer’s spent grains for industrial drying, as well as the parameters of the necessary drying equipment, were calculated. To compare the effectiveness of the filtration method of drying barley brewer’s spent grain, the drying was calculated for a similar technical task in a rotary dryer. It was found that filtration drying can reduce the required drying time by more than 10 times while increasing the specific energy consumption for removing 1 kg of moisture by 16.8% compared to drying in the rotary dryer.

In this work, the calculation of specific energy consumption for the process of the barley brewer’s spent grain filtration drying was investigated.

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.