Methods of and systems for a dry milling process with two steps liquefications
AssigneeLee Tech LLC
InventorChie Ying Lee
Life of this patent
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Abstract
The present disclosure provides a two-step liquefication (e.g., using a high (>23 Be) and a low Be (<5 Be) liquid media) process in a dry milling process/plant. The dry milling process comprises liquifying starch from milled corns making a liquefied starch slurry in a first liquefication tank having a slurry >23 Be, performing a first solid/liquid separation using a first paddle screen after the liquifying starch, soaking, cooking, or degrading protein in a second liquefication tank with a slurry <5 Be, and performing a second solid/liquid separation using a second paddle screen after the soaking, cooking, or degrading protein in a second liquefication tank.
Claims10
A dry milling process comprising:
- a liquifying starch in floury endosperm from milled corn kernels making a liquefied starch slurry in a first liquefication tank having a slurry of 20-27 Be;
- b. performing solid/liquid separation forming a liquid portion and a solid portion;
- c. sending the liquid portion containing the starch in the floury endosperm to a fermenter;
- d. sending the solid portion for reducing a density of the slurry of 20-27 Be to a slurry <5 Be by using a washing water from backset stream after the first liquefication tank and before a second liquefication tank, wherein the solid portion comprises grit and germ particles;
- e. soaking, cooking, or degrading protein using a protein cell wall degrading enzyme in the second liquefication tank having the slurry <5 Be, wherein the protein cell wall degrading enzyme contains cellulase, protease, cell wall degrading enzymes, or a combination of thereof;
- f. performing wet grinding after the second liquefication tank to break up and release starch in horny endosperm and oil;
- and
- g. liquefying starch in the horny endosperm in the second liquefication tank having the slurry <5 Be.
A dry milling process comprising:
- a. liquifying starch in floury endosperm from milled corn kernels making a liquefied starch slurry in a first liquefication tank having a slurry of 20-27 Be;
- b. performing solid/liquid separation forming a liquid portion and a solid portion;
- c. sending the liquid portion containing the starch in the floury endosperm to a fermenter;
- d. sending the solid portion for reducing a density of the slurry of 20-27 Be to a slurry <5 Be by using a washing water from backset stream after the first liquefication tank and before a second liquefication tank, wherein the solid portion comprises grit and germ particles;
- e. degrading protein using a protein cell wall degrading enzyme in the second liquefication tank having the slurry <5 Be, wherein the protein cell wall degrading enzyme contains cellulase, protease, cell wall degrading enzymes, or a combination of thereof;
- f. performing wet grinding after the second liquefication tank to break up and release starch in horny endosperm and oil;
- and
- g. liquefying starch in the horny endosperm in the second liquefication tank having the slurry <5 Be.
Dependencies are inferred from the claim text.