Production of clean starch hydrolysates
AssigneeDanisco US Inc.
InventorsRobert I Christensen, Jayarama K Shetty
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Abstract
Described is a process for producing high quality starch hydrolysates using course-ground grains and seeds in a high temperature steeping process. The process is ideal for producing high quality starch hydrolysates in an energy-efficient manner, as well as for producing high quality animal feed and oil co-products.
Claims22
A process for producing a soluble starch hydrolysate from grains or seeds, comprising steeping coarsely-ground grains or seeds at a temperature above the gelatinization temperature of starch in the grains or seeds in the presence of a thermostable α-amylase to produce a starch hydrolysate from starch present in the grains or seeds;
- and recovering the soluble starch hydrolysate from the steeping water.
The process of any of the preceding claims, wherein the starch hydrolysate is separated from depleted coarsely-ground grains or seeds during or following recovery of the starch hydrolysate from the steeping water.
The process of any of the preceding claims, wherein the thermostable α-amylase is exogenous or non-native with respect to the grains or seeds.
The process of any of the preceding claims, wherein steeping is performed in the presence of a secondary exogenous or non-native beneficial enzyme.
The process of any of the preceding claims, wherein the average particle size of the coarsely-ground grains or seeds is greater than at least 50%, at least 60%, at least 70%, at least 70%, at least 80%, at least 90% or greater, than particles screened though a 500 μm filter.
The process of any of the preceding claims, wherein the average particle size of the coarsely-ground grains or seeds is greater than 2 mm.
The process of any of the preceding claims, wherein the steeping temperature is at least 75° C.
The process of any of the preceding claims, wherein steeping is performed without subsequent germ separation.
The process of any of the preceding claims, wherein the soluble starch hydrolysate is fermented.
The process of any of the preceding claims, wherein fermentation is performed without prior or subsequent fiber separation.
An ethanol fermentation process utilizing the steep liquor described in previous claims, where the ethanol concentration exceeds 15% w/w in final fermentation broth.
Dependencies are inferred from the claim text.