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Method for recycling dry branches and fallen leaves

A litter and leaf recycling technology, which is applied in the field of lignocellulosic raw material recycling, can solve problems such as difficult resource utilization of plant biomass, negative effects on forests and the environment, forest litter fires, etc., to increase product revenue, Improve the utilization rate of raw materials and reduce the effect of pollution discharge

Inactive Publication Date: 2014-04-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. The problem of difficult resource utilization of plant biomass due to the existence of anti-degradation barriers
[0005] 3. Negative effects of excessively thick litter on forests and the environment
[0006] 4. Disposal of litter collected by sanitation
If an effective treatment method cannot be found, it will further cause environmental problems
[0007] 5. The problem of fire caused by forest litter

Method used

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  • Method for recycling dry branches and fallen leaves
  • Method for recycling dry branches and fallen leaves
  • Method for recycling dry branches and fallen leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] All the litter is used to prepare the board after steam explosion-hot pressing

[0037] After the collected litter is processed into 60-600 mesh after 1.8MPa, 5min steam explosion, it is fully stirred with non-formaldehyde additives and spread into a multi-layer gradual structure. After a certain temperature and pressure, One-time hot pressing. The formaldehyde emission of the product is 0.01mg / L, the water swelling rate is 1.1%, the static bending strength is 19.7MPa, and the internal bonding strength is 0.7Mpa.

Embodiment 2

[0039] All the litter is used to prepare fertilizer after steam explosion-solid fermentation

[0040] Cut the litter to a length of 1-4cm, put it in the steam explosion tank, add 3% ammonia, close the feed valve, use 1.5MPa, 7min after steam explosion, get the litter after steam explosion ammoniated treatment . Mix the steam explosion ammoniated materials: bran: quicklime=100:7:0.3, and then insert 3% of the substrate weight of Bacillus megaterium phosphate, 3% of Bacillus bacterium, 4% of brown spherical nitrogen-fixing bacteria , And then according to the solid-liquid ratio of 1:2, natural composting in summer for 4 days, that is, the solid-state fermented material is obtained, then 2 times the clay is mixed into it, and then naturally dried to obtain an organic fertilizer product, which contains 55% organic matter, 10 % Inorganic ingredients, 4% humic acid, bacteria count 1.8 billion / g ecological fertilizer.

Embodiment 3

[0042] Cellulose enzymatic hydrolysis and extraction of litter to produce monosaccharide and lignin products

[0043] The litter that can be crushed under lighter force or the litter collected by environmental sanitation (containing a small amount of litter), its anti-degradation barrier has been cracked to a greater extent under the biological, chemical, and physical effects of the natural habitat, and can be directly enzyme solution.

[0044] According to the quality of the absolute dry material, the amount of cellulase added is 30FPU / g substrate, the buffer is acetic acid-sodium acetate buffer, the amount added is 1:10 (w / w) according to the solid-liquid ratio, and the bacteriostatic agent azide The addition amount of sodium sulfide was 0.3% (w / v), and the reaction was carried out in a water bath shaker at 50°C. The rotation speed of the shaker was 150 n / min. After 48 hours of enzymolysis, the conversion rate of cellulose reached 60%. After the enzymolysis is completed, the fil...

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Abstract

The invention relates to a method for recycling dry branches and fallen leaves, belonging to the field of recycling of lignocellulose. The method for recycling the dry branches and fallen leaves comprises the steps: 1, completely transforming into a product, namely, directly firing, pressing to obtain a solid fuel for generating power, preparing a panel by using steam explosion and hot pressing, or preparing a fertilizer by steam explosion and solid fermentation; 2, transforming into a plurality of products by grading, namely, performing cellulase enzymolysis-extraction to co-produce monosaccharide and lignin products, performing steam explosion-washing-cellulase enzymolysis-extraction to co-produce hemicellulose monosaccharide, cellulose monosaccharide and lignin products, and performing steam explosion-washing-extraction to co-procedure hemicellulose monosaccharide, cellulose and lignin products. The method for recycling the dry branches and the fallen leaves, provided by the invention, is established on the basis of pretreating the dry branches and the fallen leaves through biological, chemical, physical and physical-chemical functions in a natural environment, and the dry branches and the fallen leaves are transformed into multiple different products according to the demand through a clean and efficient manner.

Description

【Technical Field】 [0001] The invention belongs to the application field of resource utilization of lignocellulose raw materials, and particularly relates to a method for resource utilization of litter. 【Background technique】 [0002] Litter refers to the branches and leaves fallen off during the natural growth of trees, mainly including natural pruning (after the young forest is closed, the branches at the base of the canopy gradually wither due to insufficient light) or natural fallen branches and leaves in different seasons. The existence of litter has a certain beneficial effect on forest ecosystems, tourist attractions, urban greening, road greening and other tree locations, including water conservation and nitrogen source as fertilizer. The litter to be used in this patent is correct The part where the trees grow. Therefore, the resource utilization of litter in this article can solve the following problems: [0003] 1. Resources, energy and environmental issues. At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05F17/00C12P19/14C12P19/02C12P19/04C12P5/02C12P7/06C12P7/16
CPCY02E50/10Y02E50/30Y02W30/40
Inventor 陈洪章赵军英
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI