Method for preparing rice hull ash active carbon from solid-state co-fermentation rice hull

A technology of solid-state fermentation and activated carbon, applied in chemical instruments and methods, solid waste removal, carbon compounds, etc., to achieve the effects of good surface micropore structure, easy operation, and simple preparation process

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

[0005] In the research on preparing carbonized rice husk adsorbent from rice husk, in order to improve the adsorption capacity of carbonized rice husk, chemical reagents such as acid and alkali are used to pretreat rice husk or activated carbonized rice husk, and two-step microbial fermentation pretreatment is used. However, the research on using mixed bacteria solid-state fermentation to pretreat rice husk and then dry distillation to prepare activated carbon from rice husk ash is still blank at home and abroad.

Method used

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  • Method for preparing rice hull ash active carbon from solid-state co-fermentation rice hull
  • Method for preparing rice hull ash active carbon from solid-state co-fermentation rice hull

Examples

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Embodiment 1

[0016] Example 1: Prepare rice husk ash activated carbon according to the following steps

[0017] In the first step, the white rot fungus was inserted into the rice husk fermentation medium and fermented at 25℃ for 9 days to obtain the fermentation substrate; the water content of the medium was 30%, and the inoculum was the spore suspension concentration of 10 7 cfu / mL, the inoculation volume is 5%; among them, the rice husk fermentation medium is composed of the following components by weight percentage: rice husk 10%, ammonium sulfate 3.0%, potassium dihydrogen phosphate 3.0%, magnesium sulfate 3.0%, Tween- 80 3.0%, pH4, the rest water;

[0018] In the second step, insert Trichoderma viride into the fermentation substrate of step 1, and ferment for 7 days at a temperature of 25°C. The inoculum is the spore suspension concentration of 10 7 cfu / mL, the inoculation volume is 5%;

[0019] The third step is carbonization to prepare rice husk ash activated carbon: firstly, the rice husk...

Embodiment 2

[0020] Example 2: Prepare rice husk ash activated carbon according to the following steps

[0021] In the first step, the white rot fungus is connected to the rice husk fermentation medium and fermented at 30℃ for 6 days to obtain the fermentation substrate; the water content of the medium is 55%, and the inoculum is 0.5×10. 7 cfu / mL, the inoculation volume is 15%; among them, the rice husk fermentation medium is composed of the following components by weight percentage: rice husk 15%, ammonium sulfate 1.75%, potassium dihydrogen phosphate 1.7%, magnesium sulfate 1.75%, Tween- 80 1.75%, pH 5.0, the rest is water;

[0022] In the second step, insert Aspergillus niger into the fermentation substrate of step 1, and ferment for 4 days at a temperature of 30°C. The inoculum amount is 0.5×10 spore suspension. 7 cfu / mL, the inoculation volume is 15%;

[0023] The third step is carbonization to prepare rice husk ash activated carbon: firstly, the rice husk treated in step two is dehydrated a...

Embodiment 3

[0024] Example 3: Prepare rice husk ash activated carbon according to the following steps

[0025] In the first step, the white rot fungus is connected to the rice husk fermentation medium and fermented at 35℃ for 3 days to obtain the fermentation substrate; the water content of the medium is 80%, and the inoculum is the spore suspension concentration of 10 8 cfu / mL, the inoculum volume is 25%; among them, the rice husk fermentation medium is composed of the following components by weight percentage: rice husk 20%, ammonium sulfate 0.5%, potassium dihydrogen phosphate 0.5%, magnesium sulfate 0.5%, Tween -80 0.5%, pH 6.5, the rest is water;

[0026] In the second step, insert Trichoderma reesei into the fermentation substrate of step 1, and ferment for 1 d at a temperature of 35°C. The inoculum is the spore suspension concentration of 10 8 cfu / mL, the inoculation volume is 25%;

[0027] The third step is carbonization to prepare rice husk ash activated carbon: firstly, the rice husk t...

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Abstract

The invention discloses a method for preparing rice hull ash active carbon from solid-state co-fermentation rice hull. The method comprises the steps of: firstly, incubating white-rot fungi in a rice hull fermentation culture medium, incubating trichoderma viride, or aspergillus niger or trichoderma reesei or trichoderma koningii or blue mould, and carrying out dry distillation to prepare the rice hull ash active carbon after solid-state co-fermentation. The method is simple in preparation process, and easy to operate; and the prepared rice hull ash active carbon has a good surface micro-pore structure and strong adsorptive property.

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 pretreating rice husks by mixed bacteria solid-state fermentation. Background technique [0002] Generally, natural rice husk contains 10%-12% water, 16%-20% polysaccharides, 26%-36% cellulose, 0.4%-0.8% crude fat, 18%-20% ash, and 20%-24 lignin. %, crude protein 1.5%-2.0% and 14%-16% SiO 2 . SiO 2 It is distributed in a grid shape and acts as a skeleton. Lignin, cellulose, etc. are filled in the grid. When the cellulose is partially degraded, the surface of the rice husk becomes microporous. 2 The grid nodes are exposed and become an ideal adsorbent raw material. If the incomplete combustion of rice husk is controlled, part of the carbon can be retained, and the result is carbonized rice husk. Observed by electron microscope, its structure is a hollow network structure. The fixed carbon in the rice husk ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08B09B3/00C01B32/225
Inventor 赵玉萍许兴友尹秀莲游庆红李文谦
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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