Method for preparing activated charcoal by using discarded edible mushroom slag

A technology for preparing activated carbon and fungus residue, which is applied in the field of utilization of waste edible fungus residue, can solve the problems of unreasonable utilization and limited ability to deal with fungus residue, and achieve the effects of eliminating environmental pollution, obvious market competitive advantages, and rich sources of raw materials

Inactive Publication Date: 2008-01-30
SICHUAN UNIV
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  • Abstract
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Problems solved by technology

However, the combustion of fungus residue can only obtain 10% of its heat energy, and its utiliz...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0032] Sieve the waste edible mushroom residue with a 3-20 mesh sieve to remove sand, soil and other impurities, and then pickle it with 20% nitric acid solution at a temperature of 45°C for 10 hours; The bacterium slag after the washing process is dried in a dryer, so that the moisture content of the dried bacterium slag is 20%, and then it is pulverized into powder with a particle size of 80 meshes; In terms of weight percentage, add 15% coal tar, stir and mix evenly, put it into a molding machine to make pellets with a particle size of 8mm, and then under the protection of an inert gas, heat up to 550°C at a rate of 20°C / min for carbonization , The carbonization time is 1 hour; the carbonized material is activated with carbon dioxide gas at a temperature of 800 ° C for 60 minutes. The yield of activated carbon is 30%, the iodine adsorption value is 800mg / g, and the strength of activated carbon is 90%.

Embodiment 2

[0034] Sieve the waste edible mushroom residue with a 3-20 mesh sieve to remove sand, soil and other impurities, and then pickle it with a nitric acid solution with a concentration of 30% at a temperature of 60°C for 3 hours; The bacterium slag after the washing process is dried in a dryer, so that the moisture content of the dried bacterium slag is 8%, and then it is pulverized into powder with a particle size of 50 mesh; In terms of weight percentage, add 20% polyvinyl alcohol, stir and mix evenly, put it into a molding machine to form a column with a diameter of 8mm, and then under the protection of an inert gas, raise the temperature to 600°C at a rate of 15°C / min for carbonization. The carbonization time is 1.5 hours; the carbonized material can be activated with carbon dioxide gas for 120 minutes at a temperature of 750°C. The yield of activated carbon is 27%, the iodine adsorption value is 900mg / g, and the strength of activated carbon is 85%.

Embodiment 3

[0036] Sieve the waste edible mushroom residue with a 3-20 mesh sieve to remove sand, soil and other impurities; dry the screened mushroom residue in a dryer so that the moisture content of the dried mushroom residue is 12%. Then it is pulverized into a powder of 100 mesh particle diameter; the particle diameter is 100 mesh powdery bacterium residue, by weight percentage, add 10% phenolic formaldehyde and stir and mix evenly, put into the forming machine and make a columnar shape with a diameter of 4mm, Then, under the protection of inert gas, carbonize at a rate of 10°C / min to 400°C for 2.5 hours; activate the carbonized material with water vapor at a temperature of 800°C for 80 minutes. The yield of activated carbon is 32%, the iodine adsorption value is 720mg / g, and the strength of activated carbon is 90%.

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Abstract

The invention discloses a method for preparing active carbon with waste edible fungi residues, and is characterized in that: the waste edible fungi residues are firstly sieved and go through acid washing, then are dried, crumbled or dried, crumbled and molded, and finally the active carbon is obtained upon carbonization and activation. The invention not only has abundant raw material sources, so nonrenewable resources such as coal, tar and valuable wood materials that are used commonly at present can be saved, but also has low product cost, high added value, obvious market competition advantages, prominent economic and social benefits, besides, a new way is found for solving the environment pollution caused by the waste fungi residues, thereby realizing series production of producing fungi and preparing active carbon with the fungi residues.

Description

technical field [0001] The invention belongs to the technical field of utilization of waste edible fungus residues, and in particular relates to a method for preparing activated carbon by using waste edible fungi residues. Background technique [0002] With the vigorous development of the edible fungus industry, the waste of edible fungi (also known as fungus residue) is increasing day by day. Except for a few wastes that are used as agricultural fertilizers, most of the wastes are discarded and piled outdoors. In addition to occupying land, it also causes rivers to be blocked. The pollution of drinking water has become so serious that it cannot be tolerated, and the direct and indirect economic losses brought about are also increasing. According to a survey of a town in Shifang District, Deyang City, Sichuan Province, the annual consumption of mushroom bags in the town’s edible fungus production reaches 0.6 kg of dry culture medium, and the waste generated annually reaches ...

Claims

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Application Information

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IPC IPC(8): C01B31/08
Inventor 华坚尹华强吴莉丽楚英豪胡勇赵瑞方
Owner SICHUAN UNIV
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