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Biological compound enzyme and method thereof used for straw papermaking

A compound enzymatic and biological technology, which is applied in pulp beating/refining method, papermaking, using microorganism/enzymatic cellulose treatment, etc.

Inactive Publication Date: 2017-08-22
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a biological compound enzyme biochemical agent and its preparation method for straw bio-pulp by adopting biological fermentation technology in order to overcome the existing problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The biological compound enzyme biochemical agent is composed of the following raw materials mixed by weight percentage: white rot fungus 15%, chrysosporium flat grass fungus 20%, xylanase 20%, glucoamylase 15%, and yeast 30%.

[0042] The biological complex enzyme biochemical agent and the carrier are mixed in a mass ratio of 1:0.8.

[0043] The carrier is obtained by mixing polylactic acid-glycolic acid copolymer and chitin. The polylactic acid-glycolic acid copolymer is 20 wt% and the chitin is 80 wt%. The poly(lactic-co-glycolic acid) (PLGA) is formed by random polymerization of two monomers-lactic acid and glycolic acid, and the polymer is composed of 75% lactic acid and 25% glycolic acid , The molecular weight is 15000-25000, and its glass transition temperature is between 40-60 °C. The chitin, whose chemical name is β-(1,4)-2-acetamido-2-deoxy-D-glucose, was purchased from Qingdao Belt Biotechnology Co., Ltd.

[0044] The preparation method of the biological composite ...

Embodiment 2

[0047] Others are the same as Example 1, the difference is:

[0048] The biological compound enzyme biochemical agent is composed of the following raw materials mixed by weight percentage: white rot fungus 15%, chrysosporium flat grass fungus 25%, xylanase 10%, glucoamylase 20%, and yeast 35%.

[0049] The biological complex enzyme biochemical agent and the carrier are mixed in a mass ratio of 1:1. The carrier is obtained by mixing polylactic acid-glycolic acid copolymer and chitin. The polylactic acid-glycolic acid copolymer is 25wt% and the chitin is 75wt%.

[0050] The preparation method of the biological composite enzyme biochemical agent preparation includes the following steps:

[0051] The above-mentioned bacteria and enzymes are mixed according to the percentages and mixed with the carrier, stirred uniformly, and then allowed to stand for 5 hours, and finally dried at a low temperature at 6°C, and the moisture content after drying is controlled at 5% to obtain a biological com...

Embodiment 3

[0053] Others are the same as Example 1, the difference is:

[0054] The biological compound enzyme biochemical agent is composed of the following raw materials mixed by weight percentage: white rot fungus 20%, chrysosporium flat grass fungus 10%, xylanase 15%, glucoamylase 10-25%, yeast 20% -35%.

[0055] The biological complex enzyme biochemical agent and the carrier are mixed in a mass ratio of 1:1.2. The carrier is obtained by mixing polylactic acid-glycolic acid copolymer and chitin. The polylactic acid-glycolic acid copolymer is 30 wt% and the chitin is 70 wt%.

[0056] The preparation method of the biological composite enzyme biochemical agent preparation includes the following steps:

[0057] The above-mentioned bacteria and enzymes are mixed according to the percentage and mixed with the carrier, stirred evenly, and then allowed to stand for 8 hours, and finally placed at 2°C for low-temperature drying, and the moisture content after drying is controlled at 10% to obtain the...

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Abstract

The invention discloses a pulping and papermaking process through multiple combined biological enzymes. The process disclosed by the invention is a biological pulping method comprising the following steps: fermenting white-rot fungi, phanerochaete chrysosporium, xylanase, glucoamylase and saccharomycetes to prepare paper pulp; taking agricultural straws and the like as main raw materials, cutting grass, removing impurities, puffing, fermenting the combined biological enzyme fungi, pulp washing, pulp selecting, pulp grinding and separating, thereby obtaining the pulp. Black liquor is not produced in the pulping process, the fermentation water and pulping water can be recycled, and wastewater zero discharging can be achieved.

Description

Technical field [0001] The invention belongs to the field of biological pulping, and relates to a composite enzyme and a production process of using the composite enzyme to ferment paper pulp. Background technique [0002] The paper industry is one of the important basic industries of our national economy. At the same time, the papermaking industry is also a processing and manufacturing industry with high resource and energy consumption intensity, large amount of pollutants, and serious environmental impact. In addition to a large amount of sewage, a large amount of solid waste is generated in the papermaking process. With the gradual expansion of the scale of the industry, the environmental impact of these solid wastes has become increasingly prominent, and various ecological and social problems that follow have gradually become prominent. [0003] Nowadays, the commonly used paper-making pulping method has high energy consumption, and the biological decomposition method is us...

Claims

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Application Information

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IPC IPC(8): D21B1/06D21B1/00D21C5/00D21C9/02D21D1/20D21D5/02
CPCD21B1/00D21B1/061D21C5/005D21C9/02D21D1/20D21D5/02
Inventor 阎永平
Owner QILU UNIV OF TECH
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