Brewery spent grains
Brewery spent grains are a by-product of beer breweries. It mainly consists of the outside of the malting barley and protein parts of the malting barley, from which the brewer has obtained the carbohydrates. By means of the sprouting of malting barley, malt is created, in which an important part of the starch is converted into malt sugars. The malt mixture is pumped into clarification vessels, in which the soluble components are washed out during stirring and the addition of warm water. The sugary water, called wort, is further used for the production of beer. The protein-rich barley residues are left behind in the clarification vat and are marketed as brewery spent grains.