Process for producing protein-rich product, fibrous product and/or vegetable oil from brewer's spent grain
AssigneesKirin Beer Kabushiki Kaisha, Chiyoda Corporation
InventorsSohtaroh Kishi, Takashi Kimura, Takeshi Minami, Haruto Kobayashi
Life of this patent
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Abstract
A process for producing a protein-rich product and/or a fibrous product is disclosed which includes the steps of pressing brewer's spent grain (BSG) in a wet state, and sieving the resulting pressed BSG in the presence of water to thereby separate it into a protein-containing fraction and a fibrous fraction.
Claims19
A process for producing a protein-rich product and a fibrous product from brewer's spent grain containing germ, husks and a proteinaceous material adhering to the husks, said process comprising:
- providing a wet brewer's spent grain having a water content of at least 65% by weight;
- passing said wet brewer's spent grain through a roll mill to press said brewer's spent grain with simultaneous grinding of the germ and the proteinaceous material, thereby separating said germ and proteinaceous material from said husks;
- and
- sieving the brewer's spent grain in water, using a screen of 20-50 mesh, after passage through the roll mill to obtain a protein-rich product, containing the germ and at least 50% proteinaceous material, as a minus fraction and the husks as a plus fraction.
A process for producing a protein-rich product and a fibrous product from brewer's spent grain containing germ, husks and a proteinaceous material adhering to the husks, said process comprising:
- providing a wet brewer's spent grain having a water content of at least 65% by weight;
- passing said wet brewer's spent grain through a roll mill to press and grind said brewer's spent grain with simultaneous grinding of the germ and the proteinaceous material, thereby separating said germ and proteinaceous material from said husks;
- and
- sieving the brewer's spent grain after passage through the roll mill, using a 5-20 mesh screen, to obtain a protein-rich fraction, containing the germ and proteinaceous material, as a minus fraction and the husks as a plus fraction;
- sieving said protein-rich fraction into a coarse fraction and a fine fraction, using a 20-50 mesh screen, said fine fraction containing at least 50% protein;
- recovering said fine fraction as a protein-rich product;
- extracting said coarse fraction with a 0.05 N-0.15 N alkaline aqueous solution at a temperature of 60.degree.-100.degree. C. for a period of time of 10-40 minutes to obtain an extract;
- acidifying said extract to form a precipitate;
- and
- separating and recovering said precipitate as protein-rich product.
Dependencies are inferred from the claim text.