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Process for screening and refining wheat starch

A wheat starch and screening technology, applied in the field of wheat deep processing technology, can solve the problems of low added value, C starch phase cannot be stored for a long time, easy to ferment and deteriorate, etc., so as to increase added value, improve screening effect and quality, reduce Effects of sour factors

Active Publication Date: 2014-12-10
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the C starch phase (also called pentosan phase) contains a lot of starch, sugar and protein, although it is rich in nutrition (because it contains many beneficial ingredients, such as pentosan, etc.), it is easy to ferment and deteriorate, so C The starch phase (slurry state) cannot be stored for a long time and is generally sold as a raw material for the production of other products (e.g. alcohol) with very low added value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The sieving of wheat A starch of the present invention and refining process comprise the steps:

[0019] The A starch slurry raw material obtained from the three-phase decanter is firstly filtered through a round sieve (or flat sieve) with a pore size of 1 mm, and the gluten in the slurry raw material is filtered out, and the remaining slurry is first passed through a first-stage centrifugal sieve (such as a type of ZXS-850 centrifugal sieve) for sieving, the sieve mesh is 250 mesh, the rotating speed is 900r / min; then the oversize is pumped into the secondary centrifugal sieve (such as ZXS-850 centrifugal sieve) for sieving again, The sieve of the secondary centrifugal sieve is 200 mesh, and the rotating speed is 900r / min; Horizontal screw machine) for separation treatment, the obtained light phase substances such as soluble protein and sugar can be treated separately after collection (according to the treatment effect, it can be treated as wastewater or process water)...

Embodiment 2

[0022] The sieving of wheat B starch of the present invention and refining process comprise the steps:

[0023] Add the composite enzyme compounded by protease and pentosanase in the ratio of 1:3 to 1:5 to the B starch slurry raw material obtained from the three-phase decanter, and the addition amount of the composite enzyme is the slurry 1%~3% of the raw material. In actual use, the amount of compound enzyme added can be adjusted according to the concentration of the slurry raw material: when the concentration is high, the amount can be added, and when the concentration is low, the amount can be small; the compound enzyme can make the slurry raw material Degradation of sugars in the medium, destroying the combination of sugars and proteins, reducing the viscosity of the B starch slurry, which is beneficial to the screening of the subsequent process; the B starch slurry treated with compound enzymes first passes through a first-stage centrifugal sieve (such as the model is ZXS-...

Embodiment 3

[0025] The sieving of wheat C starch of the present invention and refining process comprise the steps:

[0026] A compound enzyme compounded by pentosanase, xylanase and dextranase in a ratio of 6:3:1 is added to the C starch slurry raw material obtained from the three-phase decanter, and compounded The amount of enzyme added is 2%~5% of the slurry raw material; similarly, the amount of compound enzyme added can be adjusted according to the concentration of the slurry raw material: when the concentration is high, the amount can be added, and when the concentration is low, the amount can be small; It can degrade the sugar in the slurry raw material, reduce the viscosity of the C starch slurry, which is more conducive to the screening of the subsequent process; similarly, the C starch slurry after the viscosity reduction treatment is subjected to two-stage screening treatment (same as Examples 1 and 2) After that, it enters the double-cone decanter to concentrate, enters the...

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Abstract

The invention discloses a process for screening and refining wheat starch. The process comprises the following steps: screening starch slurry material by a 250-mesh primary centrifugal screen at the rotation speed of 900r / min, screening oversize materials by a 200-mesh secondary centrifugal screen at a rotation speed of 900r / min, collecting the undersized materials screened out by the primary and the secondary centrifugal screen and feeding into a primary horizontal-spiral decanter centrifuge for separation treatment, wherein obtained light-phase substances such as soluble proteins and sugar can be treated in other ways, the obtained starch phase is concentrated by a secondary horizontal-spiral decanter centrifuge to obtain the finished starch slurry; and drying the finished starch slurry to obtain the standard finished starch product. Compared with the prior art, the process has the advantages of simple technology and reduction of energy consumption due to the use of the horizontal-spiral decanter centrifuge instead of the cyclone separator unit used in the conventional processes.

Description

technical field [0001] The invention relates to a wheat deep processing process, in particular to a screening and refining process of wheat starch. Background technique [0002] At present, in the processing of wheat starch, wheat grains or wheat flour are used as raw materials, and the starch phase separated by a three-phase decanter centrifuge includes a sub-heavy phase (raw material slurry containing A starch), a heavy phase (containing B starch Raw material slurry), C starch phase (slurry stock solution containing C starch). A starch is sieved and refined from the A starch phase, the particle size is in the range of 10~38μm and meets the national standard of wheat starch, and its project indicators need to meet: moisture (%) ≤ 14; acidity (dry basis) / 0 T≤2.0~3.5; Ash content (dry basis %)≤0.25~0.4; Protein (dry basis %)≤0.3~0.5; Spots (pcs / cm²) ≤2.00~4.00; Fineness 150(%, m / m) (100-mesh sieve pass rate (%)≥99.80~98.0; whiteness / %≥93.0~91.0; viscosity 6% starch paste ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B30/04
Inventor 李利民陈红杰赵波刘翀张珊珊
Owner HENAN UNIVERSITY OF TECHNOLOGY
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