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Method for bacterially degumming corn bran fibers

A degumming method and technology of corn husks, applied in the field of microbial degumming of corn husk fibers, can solve problems such as fiber damage and environmental pollution, and achieve the effects of reducing damage, reducing fiber damage, and low fiber residual glue rate

Active Publication Date: 2018-02-27
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, alkali degumming is mainly used for degumming corn husks. Although there is also a chemical-biological combination method for degumming corn husks in the prior art, the main role is still alkali treatment, and this method not only damages the fiber. Pollution is serious

Method used

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  • Method for bacterially degumming corn bran fibers
  • Method for bacterially degumming corn bran fibers

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preparation example Construction

[0028] (3) Preparation of corn husk fiber microbial degumming solution, aspergillus niger (Aspergillus niger) HYA4 is cultivated in a solid fermentation medium, the fermented product is extracted and centrifuged to obtain a supernatant as a degumming solution;

[0029] The Aspergillus niger HYA4 has a preservation number of CGMCC No.1897;

[0030] The described solid fermentation medium and culture conditions are: bran:straw=3:2, ammonium sulfate addition is 5.5%, material-to-water ratio is 1:3, initial pH is 5.5, culture temperature is 32~36 DEG C, culture The period is 72h;

[0031] The preparation method of the degumming solution is as follows: add water to Aspergillus niger (Aspergillus niger) HYA4 solid fermentation culture for 1.5h with a water ratio of 1:20, and then centrifuge, the centrifugal speed is 3000r / min, and the centrifugation time is 10min;

[0032] Before the described Aspergillus niger (Aspergillus niger) HYA4 solid fermentation, the strain preservation st...

Embodiment 1

[0058] (1) select corn husks without mildew, and remove dust and debris on the corn husks;

[0059] (2) Carry out soaking pretreatment to corn husk fiber, the bath ratio is 1:10 (w / v), the concentration of pulling apart powder BX is 2g / L, and treatment time is 4h;

[0060] (3) Inoculate Aspergillus niger (Aspergillus niger) HYA4 on a solid fermentation medium, the composition of the medium is bran: straw = 3:2, the amount of ammonium sulfate added is 5.5%, the ratio of material to water is 1:3, and the initial pH is 5.5 After cultivating at 36°C for 72 hours, the fermentation was completed, and water was added to the solid fermentation culture of Aspergillus niger (Aspergillus niger) HYA4 for 1.5 hours with a water ratio of 1:20, and then centrifuged at a speed of 3000r / min, and the centrifugation time was 10min, the resulting supernatant was used as a degumming solution;

[0061] (4) Microbial degumming of corn bran fiber, place the corn bran fiber after step (2) pretreatmen...

Embodiment 2

[0065] (1) select corn husks without mildew, and remove dust and debris on the corn husks;

[0066] (2) Carry out soaking pretreatment to the corn husk fiber, the bath ratio is 1:15 (w / v), the BX concentration of pulling apart powder is 1.5g / L, and the treatment time is 5h;

[0067] (3) Inoculate Aspergillus niger (Aspergillus niger) HYA4 on a solid fermentation medium, the medium composition is bran: straw=3:2, the amount of ammonium sulfate added is 5.5%, the ratio of material to water is 1:3, and the initial pH is 5.5 After cultivating at 36°C for 72 hours, the fermentation was completed, and water was added to the solid fermentation culture of Aspergillus niger (Aspergillus niger) HYA4 for 1.5 hours with a water ratio of 1:20, and then centrifuged at a speed of 3000r / min, and the centrifugation time was 10min, the resulting supernatant was used as a degumming solution;

[0068] (4) Microbial degumming of corn husk fiber, place the pretreated corn husk fiber in step (2) in...

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Abstract

The invention provides a method for bacterially degumming corn bran fibers, belonging to the technical field of renewable resource utilization. The method comprises the following steps: (1) selectingcorn brans without mildew, cleaning dust and foreign substances on the corn brans; (2) performing soak pretreatment on corn bran fibers; (3) fermenting with Aspergillus niger HYA4 solids to prepare acorn bran fiber bacterial degumming solution; (4) bacterially degumming the corn bran fibers; (5) soaking with a potassium hydroxide solution; and (6) washing and drying to obtain the corn bran fibers. The degumming method has small damage on corn bran fibers, and the prepared corn bran fibers have relatively low residual gum content, relatively high strength and flexible fibers; and the effects of no pollution to the environment, and environmental protection can be realized.

Description

[0001] This application claims the priority of a Chinese patent application filed with the China Patent Office on December 21, 2016, with application number 201611187045.X, and the title of the invention is "A Method for Microbial Degumming of Corn Fiber", the entire contents of which are incorporated herein by reference In this application. technical field [0002] The invention belongs to the technical field of renewable resource utilization, and in particular relates to a microbial degumming method for corn bran fiber. Background technique [0003] Humans have a long history of planting corn. In my country, the sown area of ​​corn is second only to rice and wheat, ranking third among food crops. In addition to harvesting corn kernels as food every year, a large amount of corn husks will also be produced. This is a huge and valuable resource, but it has not been rationally and effectively developed and utilized for a long time. Most of the corn husks are used for cooking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01C1/02D01C1/04
CPCD01C1/00D01C1/02D01C1/04
Inventor 田英华刘晓兰王路
Owner QIQIHAR UNIVERSITY
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