The end result can be stored frozen in a bin or bag and used as needed. It should be loose and dry, yet still remain moist inside of individual grains. Frozen shelflife of two to three months. Note: This preparation of spent grain will increase the volume of the grain by roughly 25%.
Waste brewer's spent grain was converted to value added products. Solid-state fermentation was used to enhance nutrients. Levels of amino acids, citric acid, antioxidant and vitamins were increased. Untargeted metabolomics is beneficial in investigating fermentation variations.