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Common deinking method employing cutinase and chemical reagents

一种化学试剂、角质酶的技术，应用在酶工程领域，能够解决酶用量大、成本增加等问题，达到效果好、提高再利用率、减少酶用量以及化学试剂的用量的效果

Active Publication Date: 2016-03-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical application, the current enzymatic deinking method has the problems of large enzyme consumption and increased cost.

Method used

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  • Common deinking method employing cutinase and chemical reagents
  • Common deinking method employing cutinase and chemical reagents
  • Common deinking method employing cutinase and chemical reagents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: separate cutinase carries out deinking or chemical method deinking

[0036] Thermobifidafusca cutinase deinking:

[0037] 1. Pulping: Take 200g of pulp (absolute dry pulp), adjust the pulp concentration to 10%, the number of revolutions is 225r / min, and the time is 30 minutes.

[0038] 2. Enzyme treatment: In a constant temperature water bath, the temperature is 60°C, the treatment time is 120 minutes, and the hands are rubbed every 10 minutes.

[0039] 3. Slurry washing and dehydration: Dilute the waste paper pulp after bio-enzyme treatment with 5L deionized water, then wash the pulp with a washing bag, and finally tear the pulp cake into small pieces, and air-dry at room temperature.

[0040] 4. Flotation: The waste paper pulp after bio-enzyme treatment is carried out in a laboratory flotation cell, and the flotation conditions: heating water to adjust the slurry concentration to 1%, the temperature is 45°C, and the flotation time is 60min. After flota...

Embodiment 2

[0060] Embodiment 2: adopt Thermobifidafusca cutinase and chemical reagent to carry out deinking jointly

[0061] Cutinase deinking:

[0062] 1. Pulping: take 200g of pulp (absolute dry pulp), adjust the pulp concentration to 10%, the number of revolutions is 225r / min, and the time is 20 minutes.

[0063] 2. Enzyme treatment: In a constant temperature water bath, the temperature is 50°C, the treatment time is 120 minutes, and the hands are rubbed every 10 minutes.

[0064] 3. Chemical treatment: In a constant temperature water bath, the temperature is 50°C, the treatment time is 60min, add 1% Na 2 SiO 3 ,0.2%MgSO 4 ,0.2%EDTA,1%H 2 o 2 .

[0065] 4. Slurry washing and dehydration: Dilute the treated waste paper pulp with 5L of deionized water, then wash the pulp with a washing bag, and finally tear the pulp cake into small pieces, and air-dry at room temperature.

[0066] 5. Flotation: The waste paper pulp after the bio-enzyme treatment is carried out in a laboratory flo...

Embodiment 3

[0074] Embodiment 3: adopt Fusariumsolani cutinase and chemical reagent to carry out deinking jointly

[0075] Cutinase deinking:

[0076] 1. Pulping: take 200g of pulp (absolute dry pulp), adjust the pulp concentration to 10%, the number of revolutions is 225r / min, and the time is 20 minutes.

[0077] 2. Enzyme treatment: In a constant temperature water bath, the temperature is 50°C, the treatment time is 120 minutes, and the hands are rubbed every 10 minutes.

[0078] 3. Chemical treatment: In a constant temperature water bath, the temperature is 50°C, the treatment time is 60min, add 2% Na 2 SiO 3 ,0.1%MgSO 4 ,0.1%EDTA,2%H 2 o 2 .

[0079] 4. Slurry washing and dehydration: Dilute the treated waste paper pulp with 5L of deionized water, then wash the pulp with a washing bag, and finally tear the pulp cake into small pieces, and air-dry at room temperature.

[0080] 5. Flotation: The waste paper pulp after the bio-enzyme treatment is carried out in a laboratory flotat...

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Abstract

The invention discloses a common deinking method employing cutinase and chemical reagents, and belongs to the technical field of enzyme engineering. The method comprises the following steps: repulping, enzyme treatment, chemical treatment, pulp washing and dewatering, and flotation, wherein the cutinase is utilized in the enzyme treatment; the amount of the cutinase is 10-20U / g oven dry stock; and the chemical treatment is treatment by adding 0.5%-4% of Na2SiO3, 0.1%-0.8% of MgSO4, 0.1%-0.8% of EDTA and 0.1%-4% of H2O2. Through combined deinking of an enzymic method and a chemical method, the problems of large enzyme amount and high cost in deinking of an existing enzymic method can be solved; the synergistic effect is generated by the enzymic method and the chemical reagent method through selection of the variety and the amount of the chemical reagents; and the deinking treatment effect is significantly enhanced. In addition, an alkaline matter does not need to use, so that the problem of sewage treatment in deinking in a conventional method is solved.

Description

technical field [0001] The invention relates to a method for jointly deinking using cutinase and chemical reagents, and belongs to the technical field of enzyme engineering. Background technique [0002] Secondary fibers, or recycled fibers, have been used for many years in the production of paper and board. With the world's paper and cardboard production and demand increasing day by day, people's awareness of environmental protection has strengthened, and countries around the world have strengthened the protection of forest resources, which forces the paper industry to increase the proportion of secondary fibers in the raw material structure. The recycling of waste paper is an effective way to solve the three problems faced by the paper industry, such as resource shortage, energy shortage and serious pollution. It is an important measure to implement clean production and the only way to adhere to sustainable development. According to the survey data of the China Paper Asso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C5/02C09D9/00
CPCC09D9/00D21C5/005D21C5/027Y02W30/64
Inventor 吴敬洪若宇宿玲恰
Owner JIANGNAN UNIV
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