Paper pulp production method by soft rot fungus biodegradation of lignin

A biodegradation and production method technology, applied in the field of pulp manufacturing, can solve the problems of short life cycle of white rot fungi, long culture cycle, unsuitable for industrial production, etc. Effect

Inactive Publication Date: 2012-06-27
张健
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AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the above-mentioned existing biological pulping method is not suitable for industrial production due to the short life cycle of white rot fungi and too long culture period, the present invention proposes a method of using soft rot fungi to rapidly and selectively decompose various Process for the production of pulp by biodegradation of lignin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Firstly, the wood-like material is squeezed several times with a rolling mill, split, cracked, and crisped along the fiber direction into fragments with a length of about 50mm, and then torn and rubbed into pieces along the fiber direction by the rubbing machine;

[0053] The second step is to carry out biodecomposition, immerse the broken strips into the pool of soft rot fungus liquid for biodecomposition, the pool contains 3.5 billion soft rot fungi / m3 of water and 1.4 billion black rot fungi / Cubic meters of water, 750 million white rot bacteria / cubic meters of water, 500 million brown rot fungi / cubic meters of water, and 300 g / cubic meters of nutrient solution for strain rejuvenation. The bacteria water is poured once every hour; the bacteria water in the pool is not discharged; the decomposition time is 48 hours, and a large amount of lignin in the decomposed raw pulp fragments is decomposed into a small amount of CO by soft rot bacteria 2 and water, the shredded s...

Embodiment 2

[0059] The raw materials are wheat straw, rice straw, and asparagus, which are cut into sections with a length of about 200mm, and then torn and shredded along the fiber direction by a shredder;

[0060] In the second step of biodecomposition, immerse the broken strips into a pool of soft rot fungus liquid for biodecomposition. The pool contains 2.5 billion soft rot fungi / m3 of water and 700 million black rot fungi / m3 Rice water, and bacteria rejuvenation nutrient solution 200 g / m3 of water; keep the temperature at 30-35 ° C; pour the bacteria water in the pool every 2 hours, and the bacteria water in the pool will not be discharged; the decomposition time is 6 hours, and the broken strips are further Cracked into crisp fiber bundles;

[0061] Afterwards, dispersing, refining, sieving and squeezing are the same as in Example 1 to obtain a pulp product, and the pulp reaches the corresponding national standard of wheat straw, rice straw, and asparagus grass.

Embodiment 3

[0063] The raw material is broken, and the reed is cut into sections of about 100mm, which are torn along the fiber direction by the rubbing machine and rubbed into shreds;

[0064] In the second step of biodecomposition, immerse the broken strips into the pool of soft rot fungus liquid for biodecomposition. The pool contains 3 billion soft rot fungi per cubic meter of water and 450 grams of bacteria rejuvenation nutrient solution / cubic meter of water; the temperature is maintained at 30-35°C; the pool is poured with bacterial water every 2 hours, and the bacterial water in the pool is not discharged; the decomposition time is 38 hours, and the broken strips are further cracked into loose fiber bundles

[0065] The subsequent decompression, refining, sieving and squeezing are the same as in Example 1 to obtain a pulp product, and the pulp reaches the corresponding national standard for making pulp from reed raw materials.

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Abstract

The invention relates to a paper pulp production method by soft rot fungus biodegradation of lignin. With the combination of machining, crushed raw materials are immersed in water tank filled with a soft rot fungus liquid for biodegradation. The biodegradation is carried out at the temperature of 30-45 DEG C for 6-48 hours. According to the method, no chemicals are used in the production process. The method provided by the invention has advantages of no pollution, water saving, little material loss and low energy consumption. The cost by the method is only 40% of that by a conventional chemical method for pulping. Wheat straw, straw, reed, Eulaliopsis binata, tobacco rod, bagasse, bamboo, timber and the like are used as raw materials for paper pulp production. In addition, zero discharge of water for paper pulp production is realized. The paper pulp produced by the method is excellent in quality, contains no chemical toxicant, can be used to produce daily paper such as food packing paper, medical packing paper and the like. In addition, there is no pollution during the production process. The method provided by the invention has very high economic benefits and social benefits and is an ecological balanced high-tech value-promotion technology.

Description

technical field [0001] The invention relates to a process for making pulp, in particular to a pulp production method utilizing soft rot fungus biodegradation combined with mechanical processing. Background technique [0002] The invention of paper has greatly promoted the development of a civilized society. At present, the world's annual per capita paper consumption is 81.4 kg, and China's annual per capita paper consumption is 64.3 kg. China's total paper consumption ranks first in the world. China produced 84.61 million tons of paper in 2010, of which 35.86 million tons were imported pulp, and the rest of the pulp was mainly recycled waste paper. [0003] The commonly used papermaking production processes are mainly "alkali method" and "sulfite method". lignin pulp. Lignin is the substance that binds cellulose in plants. Only when the lignin is decomposed and the fibers are scattered and flocculated can pulp be produced. As a result, a large number of chemical raw mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02
CPCY02W30/64
Inventor 张健
Owner 张健
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