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Pretreatment method for enzymolysis of wheat straws

A pretreatment and straw technology, applied in the direction of fermentation, etc., can solve the problem of not being able to improve the multiple utilization of straw, and achieve the effects of being conducive to sustainable development, reducing capital consumption, and high conversion efficiency

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

Although this patent can fully realize pollution-free discharge and meet the requirements of environmentally friendly pulping, it cannot improve the multiple utilization of straw and realize the reuse of biomass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) First screen the connecting rods, cut the straws into 5cm sections with tools, then soak the wheat straw straws in water at about 90°C for 30 minutes, and then squeeze the soaked straws with an extruder to remove the straws. of moisture. Add 10% of H to the extruded wheat straw relative to the mass of the dry wheat straw 2 o 2 , the H 2 o 2The mass concentration is 30%, then add 10% NaOH relative to the mass of dry wheat straw, and then add distilled water. Control at 90°C, cooking time is 1h.

[0041] (2) will go through H 2 o 2 The wheat straw pretreated with NaOH is placed in an extruder and extruded again, and the extruded liquid is collected, and the extruded wheat straw is fully washed with water until the pH value is neutral, and then extruded Dehydration to obtain the treated wheat straw.

[0042] (3) Add 5.0% NaOH relative to the absolute dry wheat straw mass and 5.0% NaOH relative to the absolute dry wheat straw mass 2 SO 3 Dissolve in distilled ...

Embodiment 2

[0048] (1) First, screen the connecting rods, cut the straws into 5cm sections with tools, soak the wheat straw straws in water at about 100°C for 45 minutes, and then squeeze the soaked straws with an extruder to remove the stalks. of moisture. Add 15% of H to the extruded wheat straw relative to the mass of the dry wheat straw 2 o 2 , the H 2 o 2 The mass concentration of the dry wheat straw is 30%, then add 20% NaOH relative to the mass of the dry wheat straw, and then add distilled water. At 100°C, the cooking time is 2h.

[0049] (2) will go through H 2 o 2 The wheat straw pretreated with NaOH is placed in an extruder and extruded again, and the extruded liquid is collected, and the extruded wheat straw is fully washed with water until the pH value is neutral, and then extruded Dehydration to obtain the treated wheat straw.

[0050] (3) NaOH relative to the absolute dry wheat straw mass 8% and NaOH relative to the absolute dry wheat straw mass 8% 2 SO 3 Dissolve...

Embodiment 3

[0056] (1) First, screen the connecting rods, cut the straws into 5cm sections with tools, soak the wheat straw straws in water at about 100°C for 60 minutes, and then squeeze the soaked straws with an extruder to remove the straws. of moisture. Add 20% H to the extruded wheat straw relative to the mass of the dry wheat straw 2 o 2 , the H 2 o 2 The mass concentration is 30%, then add 30% NaOH relative to the mass of dry wheat straw, and then add distilled water. Control at 120°C, cooking time is 3h.

[0057] (2) will go through H 2 o 2 The wheat straw pretreated with NaOH is placed in an extruder and extruded again, and the extruded liquid is collected, and the extruded wheat straw is fully washed with water until the pH value is neutral, and then extruded Dehydration to obtain the treated wheat straw.

[0058] (3) Add 10% NaOH relative to the absolute dry wheat straw mass and 10% NaOH relative to the absolute dry wheat straw mass 2 SO 3 Dissolve it in distilled wat...

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Abstract

The invention relates to a pretreatment method for hydrolysis transformation of wheat straws. The method comprises soaking wheat straws in water, adding hydrogen peroxide, sodium hydroxide and distilled water into the wheat straws, carrying out stewing, carrying out extrusion through an extruder, carrying out two-stage grinding disintegrating treatment, carrying out screening, carrying out enzymatic hydrolysis, adding an enzyme solution into the enzymatic hydrolysis product under aseptic conditions, and carrying out enzymatic hydrolysis at a constant temperature to obtain a hydrolysate of wheat straws. The method fully utilizes existing devices in the pulping industry, reduces additional investment, greatly saves an economic cost, has a great significance to the recycling of the existing paper making industry and is conducive to the sustainable development of the pulping and paper making industry.

Description

technical field [0001] The invention belongs to the technical field of resource utilization after hydrolysis of wheat straw, and provides a high-efficiency hydrolysis pretreatment technology. Background technique [0002] Biomass is the most abundant organic energy on the earth, an inexhaustible renewable energy, and the fourth largest energy on the earth after coal, oil and natural gas resources. Biomass is the most important source of energy for human society, with an annual output of 170 billion tons. These abundant biomass resources are of great significance to the sustainable development of the world economy, environmental protection and effective use of resources. At present, the utilization of biomass resources at home and abroad is mainly reflected in fuel ethanol, biodiesel, biomass electricity, biogas, and biomass materials. [0003] The pulp and paper industry is the earliest industry to utilize natural cellulose, and it is also the only industry that collects, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/02
CPCC12P19/02C12P19/14C12P2201/00
Inventor 阎永平
Owner QILU UNIV OF TECH
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