Continuous process for producing ethanol using raw starch
AssigneeBroin and Associates, Inc.
InventorsSteven Lewis, Shon Van Hulzen, Debbie Roth
Life of this patent
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Abstract
The present invention relates to methods for producing high levels of alcohol during fermentation of plant material, and to the high alcohol beer produced. The method can include adding substrate continuously or clarifying continuously. The present invention also relates to methods for producing high protein distiller's dried grain from fermentation of plant material, and to the high protein distiller's dried grain produced. The present invention further relates to reduced stack emissions from drying distillation products from the production of ethanol.
Claims20
A process for producing ethanol from plant material, comprising:
- reducing the plant material to produce material comprising starch;
- the reduced plant material having particle size such that at least about 50% of the particles fit through a sieve with a 0.1-0.5 mm mesh;
- saccharifying the starch, without cooking, with an enzyme composition;
- fermenting the incubated starch to yield a composition comprising at least 15 vol-% ethanol;
- fermenting comprising reducing temperature of fermenting mixture;
- and
- recovering the ethanol and co-products from the fermentation;
- fermenting comprising adding substrate continuously and clarifying continuously.
A process for producing ethanol from plant material, comprising:
- reducing the plant material to produce material comprising starch;
- the reduced plant material having particle size such that at least about 50% of the particles fit through a sieve with a 0.1-0.5 mm mesh;
- saccharifying the starch, without cooking, with an enzyme composition;
- fermenting the incubated starch to yield a composition comprising at least 15 vol-% ethanol;
- fermenting comprising reducing temperature of fermenting mixture;
- fermenting comprising adding substrate continuously and clarifying continuously;
- recovering the ethanol and co-products from the fermentation;
- and
- drying a co-product by ring drying, flash drying, or fluid bed drying.
Dependencies are inferred from the claim text.