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Brewer’s spent grain (BSG) is a byproduct of the brewing process that accounts for approximately 85% of the waste produced by a brewery. BSG is composed of barley malt grain husks and is the solid food waste residue after wort production. Once the malt is mixed with hot water and steeped into sugars, the liquid wort is separated from the solids. This liquid is fermented by the brewing yeast to produce alcohol. Once the barley has been soaked, sprouted and dried it is deemed “spent” beca …