Method and device for continuously extracting starch in corn fiber skin by enzymic method

A corn fiber and continuous technology, applied in the field of enzymatic continuous extraction of starch from corn fiber husks, can solve the problems of high energy consumption, impossibility of industrial application, high processing cost, etc., achieve high concentration, good application and promotion prospects, and high extraction efficiency Effect

Active Publication Date: 2012-10-03
SHANDONG LUZHOU FOOD GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is used alone to extract starch from corn husks, not only the energy consumption of the pre-treatment is high, but the processing cost is too high, and the concentration of starch sugar in the extract is too low, only 1-1.5wt%, which cannot be applied industrially

Method used

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  • Method and device for continuously extracting starch in corn fiber skin by enzymic method
  • Method and device for continuously extracting starch in corn fiber skin by enzymic method
  • Method and device for continuously extracting starch in corn fiber skin by enzymic method

Examples

Experimental program
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Effect test

Embodiment 1

[0039]A device for continuously extracting starch in corn fiber husks by enzymatic method, comprising a frequency conversion speed regulation motor 1, an extraction cylinder 7, a screw conveying rod 5 and a storage tank 4, the extraction cylinder 7 is an inclined airtight cylinder, and the spiral The conveying rod 5 is arranged in the extraction cylinder 7, and one end of the screw conveying rod 5 is connected with the frequency conversion speed regulating motor 1 arranged outside the lower end of the extracting cylinder through a connecting rod. The length of the extraction cylinder is adapted to the inner diameter of the cylinder; the upper surface of the lower end of the side wall of the extraction cylinder 7 is provided with a feed inlet 2, and the lower surface of the lower end of the side wall of the extraction cylinder 7 is provided with a hydrolyzate outlet 3, and the hydrolyzate outlet 3 is connected to the storage tank 4 Through, a filter screen is arranged between th...

Embodiment 2

[0043] Utilize the device described in embodiment 1 to carry out the method for enzymatic continuous extraction of starch in corn fiber husks, the steps are as follows:

[0044] (1) Prepare an extract with a temperature of 70-72°C, a pH of 6, and 300 U / L of mesophilic α-amylase;

[0045] (2) According to the feed rate of 113.6kg / h (dry weight: 100kg / h) of corn fiber husks, add corn fiber husks to the extraction cylinder through the feed port, and the corn fiber husks are from the bottom of the extraction cylinder to the top of the extraction cylinder Movement, according to the liquid addition speed of 400L / h, add the extract prepared in step (1) to the extraction cylinder through the extraction liquid inlet, the extraction liquid moves from the top of the extraction cylinder to the bottom of the extraction cylinder, and passes through the corn fiber husk and the extraction liquid The reverse motion of contacting carries out the hydrolysis of the starch in the corn fiber husk, ...

Embodiment 3

[0052] Utilize the device described in embodiment 1 to carry out the method for enzymatic continuous extraction of starch in corn fiber husks, the steps are as follows:

[0053] (1) Prepare an extract solution with a temperature of 88-90°C, a pH of 6, and 900 U / ml of high-temperature α-amylase;

[0054] (2) According to the feed rate of 227.3kg / h (dry weight: 200kg / h) of corn fiber husks, add corn fiber husks to the extraction cylinder through the feed port, and the corn fiber husks are from the bottom of the extraction cylinder to the top of the extraction cylinder Movement, according to the liquid feeding speed of 1200L / h, add the extract prepared in step (1) to the extraction cylinder through the extraction liquid inlet, the extraction liquid moves from the top of the extraction cylinder to the bottom of the extraction cylinder, and passes through the corn fiber husk and the extraction liquid The reverse motion of the contact is carried out to hydrolyze the starch in the co...

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Abstract

The invention relates to a method and a device for continuously extracting starch in corn fiber skin by an enzymic method. The device comprises a motor, an extraction barrel, a screw conveyer bar and a storage tank, wherein the screw conveyer bar is arranged in the extraction barrel, and a hydrolysate outlet is communicated with the storage tank. The method comprises the following steps of: (1) preparing an extracting solution; (2) carrying out backward motion contact on the corn fiber skin and the extracting solution to hydrolyze starch in the corn fiber skin; and (3) when the content of the starch in corn fiber skin residues is larger than 1.5 wt%, regulating through reducing the feeding speed of the corn fiber skin, prolonging the hydrolysis time and / or improving the hydrolysate adding speed; and when the DE (Dextrose Equivalent) value of the hydrolysate is smaller than 15%, regulating through reducing the feeding speed of the corn fiber skin, prolonging the hydrolysis time and / or improving the amylase concentration of the extracting solution. The stable and continuous extraction of the starch in the corn fiber skin is realized by the method provided by the invention, the extraction efficiency is high, and the yield is high; and the hydrolysate concentration is high, which is as high as 3-5 times of intermittent extraction concentration.

Description

technical field [0001] The invention relates to a method and a device for continuously extracting starch from corn fiber husks by enzymatic method, belonging to the technical field of corn deep processing. Background technique [0002] Corn fiber husk is a by-product of the corn starch production process, and its yield generally reaches 12.5% ​​of the total amount of corn, of which the starch content in corn fiber husk reaches 16-20%, especially in the production of some corn deep processing enterprises with low technical level The starch content of the corn fiber husk is higher, reaching more than 20%, which greatly affects the yield of starch. Therefore, extracting the starch in the corn fiber husk is an important means to improve the efficiency of the starch and starch sugar industry. [0003] Corn fiber husks, a by-product of corn starch, are of low value and are mainly sold as feed ingredients. In addition to 16-20% starch, corn fiber hulls are also rich in cellulose a...

Claims

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Application Information

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IPC IPC(8): C12M1/40C12P19/14
CPCC12M33/16C12M21/18
Inventor 王德友牛纪超赵玉斌王新增
Owner SHANDONG LUZHOU FOOD GROUP
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