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Method for preparing rice hull ash active carbon by enzymatic pretreatment of rice hull

A rice husk ash, pretreatment technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., to achieve the effect of strong adsorption performance, good microporous structure, neat and dense arrangement

Inactive Publication Date: 2013-05-29
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the research on preparing rice husk ash adsorbent from rice husk, the pretreatment of rice husk mainly adopts the method of chemical reagent treatment such as acid and alkali, and also adopts the method of two-step microbial fermentation treatment, while the enzymatic method is used to pretreat rice husk , and then dry distillation to prepare rice husks is still blank at home and abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Prepare rice husk ash activated carbon according to the following steps

[0016] The first step is the construction of lignin degrading enzyme system: lignin peroxidase, manganese peroxidase and laccase are mixed according to the enzyme activity ratio of 1:0.1:0.1;

[0017] The second step, degradation of rice husk lignin: rice husk and lignin degrading enzyme system are mixed at a solid-liquid ratio of 1:5 (m / v), enzymatically hydrolyzed at 20°C for 50 hours;

[0018] The third step is the construction of the cellulose degrading enzyme system: endoglucanase, exoglucanase and β-glucosidase are mixed according to the enzyme activity ratio of 1:0.1:0.1;

[0019] The fourth step is the degradation of rice husk cellulose: rice husk and cellulose degrading enzyme system are mixed at a solid-liquid ratio of 1:5 (m / v), and enzymatically hydrolyzed at 20°C for 50 hours;

[0020] The fifth step is carbonization to prepare rice husk ash activated carbon: first, deh...

Embodiment 2

[0021] Embodiment 2: Prepare rice husk ash activated carbon according to the following steps

[0022] The first step is the construction of lignin degrading enzyme system: lignin peroxidase, manganese peroxidase and laccase are mixed according to the enzyme activity ratio of 1:50:50;

[0023] The second step is the degradation of rice husk lignin: rice husk and lignin degrading enzyme system are mixed at a solid-liquid ratio of 1:27.5 (m / v), and enzymatically hydrolyzed at 38°C for 27 hours;

[0024] The third step is the construction of the cellulose degrading enzyme system: endoglucanase, exoglucanase and β-glucosidase are mixed according to the enzyme activity ratio of 1:50:50;

[0025] The fourth step is the degradation of rice husk cellulose: rice husk and cellulose degrading enzyme system are mixed at a solid-liquid ratio of 1:27.5 (m / v), and enzymatically hydrolyzed at 38°C for 27 hours;

[0026] The fifth step, carbonization to prepare rice husk ash activated carbon: ...

Embodiment 3

[0027] Embodiment 3: Prepare rice husk ash activated carbon according to the following steps

[0028] The first step is the construction of lignin degrading enzyme system: lignin peroxidase, manganese peroxidase and laccase are mixed according to the enzyme activity ratio of 1:100:100;

[0029] The second step, degradation of rice husk lignin: rice husk and lignin degrading enzyme system are mixed at a solid-liquid ratio of 1:50 (m / v), enzymatically hydrolyzed at 55°C for 4 hours;

[0030] The third step is the construction of the cellulose degrading enzyme system: endoglucanase, exoglucanase and β-glucosidase are mixed according to the enzyme activity ratio of 1:100:100;

[0031] The fourth step is the degradation of rice husk cellulose: rice husk and cellulose degrading enzyme system are mixed at a solid-liquid ratio of 1:50 (m / v), and enzymatically hydrolyzed at 55°C for 4 hours;

[0032] The fifth step is carbonization to prepare rice husk ash activated carbon: first, deh...

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Abstract

The invention discloses a method for preparing rice hull ash active carbon by enzymatic pretreatment of rice hull. The method comprises the steps of: firstly, building a lignin degradation enzyme system with a certain enzyme activity ratio to degrade rice hull, wherein the lignin degradation enzyme system is composed of lignin peroxidase, manganese peroxidase and laccase, then degrading the rice hull by a cellulose degradation enzyme system with a certain enzyme activity ratio, wherein the cellulose degradation enzyme system is composed of endoglucanase, exoglucanase and beta-glucosaccharase, and finally distilling to prepare the rice hull ash. The rice hull is subjected to pretreatment by the lignin degradation enzyme system and the cellulose degradation enzyme system; the surface micro-pore structure of the rich hull active carbon is improved; and the adsorptive property is good.

Description

technical field [0001] The invention relates to a method for preparing rice husk ash activated carbon, in particular to a method for preparing rice husk ash activated carbon by enzymatically pretreating rice husks. Background technique [0002] my country is a large agricultural production country, but there are few high-value achievements in the comprehensive utilization of rice husks. If rice husks can be used rationally, its potential is huge and the prospect is broad. [0003] If the incomplete combustion of rice husk is controlled, the structure is a hollow network structure, which is a good raw material for preparing activated carbon, and does not contain harmful impurities (such as lead and arsenic), and is especially suitable for use in the food industry. The market potential is huge, but the current chemical and physical methods of treating rice husk and rice husk ash cannot improve the adsorption performance, thus affecting the large-scale application of rice husk....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C01B32/324
Inventor 赵玉萍许兴友
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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