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Method for microbial solid degumming of kenaf bast fiber

A bast fiber and microbial technology, applied in the field of degumming and pulping of kenaf bast fiber, can solve problems such as fiber damage, difficulty in treatment, and process limitations, so as to improve resource utilization, reduce solid load, and reduce environmental pollution Effect

Inactive Publication Date: 2011-05-04
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the past, the kenaf bast fiber was degummed by alkali method to obtain the fiber raw materials required for papermaking and textile, but the fiber will be damaged by alkali to varying degrees, resulting in a very low product yield.
In addition, the water-adding ratio of raw materials during degumming is 1:20-30, and a large amount of waste water will be generated in the degumming process, which is difficult to treat and seriously pollutes the environment, so the process is strictly limited
[0003] The water-adding ratio of raw materials in the liquid microbial degumming developed in the past ten years is about 1:20-30, and a large amount of wastewater will also be generated during the degumming process. Although the cost of sewage treatment has been reduced, it is still one of the problems that plague the development of the industry. one

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Select the bast part of kenaf, make it into fiber bundles, add tap water at a mass ratio of 1:2.0, adjust the pH value to 7 with lime water, add a microbial culture solution with a water ratio of 3% of the total amount, keep it at 25 ° C for 3 days, and take it out. Observe the fiber bundles and tear them into a mesh by hand. After removing the degumming waste water, washing with clear water and drying, the residual glue rate in the papermaking fiber raw material is 0.4%.

Embodiment 2

[0016] Select the bast part of kenaf, make it into fiber bundles, add tap water at a mass ratio of 1:2.5, adjust the pH value to 8 with lime water, add a microbial solution with a water ratio of 4% in total, keep it warm at 30°C for 4 days, and take out the fiber bundles Observe and tear it into a net shape by hand. The degumming waste water is removed, washed with clear water and dried to obtain the textile fiber raw material, and the residual glue rate in the fiber raw material is 0.3%.

Embodiment 3

[0018] Select the bast part of kenaf, make it into fiber bundles, add tap water at a mass ratio of 1:2.0, adjust the pH value to 6 with citric acid water, add a microbial solution with a water ratio of 5% of the total amount, and incubate at 35°C for 2 days. Take out the fiber bundle for observation, and when it is torn into a net shape by hand, the degumming is over. The degumming waste water is removed, washed with clear water and dried to obtain the textile fiber raw material, and the residual glue rate in the fiber raw material is 0.2%.

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Abstract

The invention provides a method for microbial solid degumming of kenaf bast fiber. Under a condition of smaller water addition ratio, pre-culturing special bacteria are added to complete the degumming; and a selected microbe is bacillus subtilis. The method belongs to water saving process technology. A fibrous raw material which is obtained after the degumming and used for paper making and spinning completely meets the requirements on paper making and spinning, the residual gum ratio is between 0.2 and 0.6 percent; and compared with the prior process, the long-fiber ratio is improved by 8 percent. The degumming method provided by the invention has the advantages of little water consumption and big material charging quantity, and can fundamentally solve the pollution problem caused by the chemical degumming; moreover, the waste water generated in degumming does not contain any chemical residue, so that the method has wide application prospect.

Description

technical field [0001] The invention belongs to a method for degumming and pulping kenaf bast fibers, and in particular relates to a method for degumming kenaf bast fibers by selecting microorganisms—Bacillus subtilis. Background technique [0002] In the past, the kenaf bast fiber was degummed by alkali method to obtain the fiber raw material required for papermaking and textile, but the fiber will be damaged by alkali to varying degrees, resulting in a very low product yield. In addition, the water ratio of the raw materials during degumming is 1:20-30, and a large amount of waste water will be generated during the degumming process, which is difficult to treat and seriously pollutes the environment, so the process is strictly limited. [0003] The water-adding ratio of raw materials in the liquid microbial degumming developed in the past ten years is about 1:20-30, and a large amount of wastewater will also be generated during the degumming process. Although the cost of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/22D01C1/04C12S3/04C12R1/125
Inventor 何连芳张玉苍
Owner DALIAN POLYTECHNIC UNIVERSITY
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