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High-efficiency combined corn stalk processing method

A corn stalk and combined processing technology, applied in fermentation and other directions, can solve the problems of incomplete destruction of cell wall barrier structure, threat to human health, waste of environment, etc., achieve important promotion and application value, and overcome technical thresholds that are difficult to transform and utilize efficiently Effect

Active Publication Date: 2013-09-25
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other crop stalks, corn stalks have the advantages of special structure, high degree of lignification, high nutrient availability, and easy collection. However, 42% of the corn stalks produced each year are directly returned to the field or returned to the field ( silage feed), 30% is used for agricultural fuel, and the proportion of high value-added processing and utilization is less than 10%, causing serious waste and environmental pollution
Ammonification and acid-base hydrolysis either need to add chemical reagents, or produce furfural, a by-product harmful to human body, which not only threatens human health, but also causes environmental pollution; steam explosion (steam explosion) is relatively clean and can be melted to a certain extent Lignin and hemicellulose degrade, loosen and soften cellulose, increase the porosity and biological accessibility of straw, but the overall damage to the cell wall barrier structure is not complete, and the energy consumption is high and the noise is large; the existing mechanical crushing particle size (The smallest can reach 50μm) is not yet able to effectively destroy the dense shielding layer of the cell wall. In view of the super flexibility of corn stalks, it is very difficult to crush them directly to a finer particle size. Problems such as agglomeration and heat generation will occur due to the increase of straw size, and the crushing efficiency is low. Therefore, ultrafine crushing of straw flexible materials is a major technical problem that has not been solved so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 25 kg of corn stalks, use a shredder to cut it into flake pieces with a length of 2 cm, a width of 1 cm, and a thickness of 0.5 cm; use a micro pulverizer to crush the flakes into 52 μm straw powder; use a ball mill to grind the above straw powder 16 minutes, the rotating speed is 1350rpm, until it is ground into ultrafine straw powder with a particle size of 10 μm.

Embodiment 2

[0020] Take 15 kg of corn stalks, cut them into 1 cm long, 1.5 cm wide, and 0.63 cm thick flaky pieces with a shredder; use a micro pulverizer to crush the flaky pieces into 80 μm straw powder; use a ball mill to grind the above stalks The powder was ground for 12 minutes at a rotational speed of 1050 rpm until it was ground into ultrafine straw powder with a particle size of 15 μm.

Embodiment 3

[0022] Take 10 kg of corn stalks, cut them into 1.5 cm long, 0.5 cm wide, and 0.2 cm thick flaky fragments with a shredder; crush the flaky fragments into 95 μm straw powder with a micro pulverizer; use a ball mill to grind the above straw The powder was ground for 8 minutes at a rotational speed of 1200 rpm until it was ground into an ultrafine straw powder with a particle size of 11 μm.

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Abstract

The invention relates to a high-efficiency combined corn stalk processing method which comprises the following steps: crushing corn stalks into stalk powder with the size of 50-100mu m through a micro crusher; grinding the stalk powder into 10-20mu m by using a ball mill to obtain superfine stalk powder; and finally, adding 650-750IU / g of composite cellulase into the superfine stalk powder, and performing enzymolysis at 50 DEG C for 5-7 hours to obtain the final high-efficiency corn stalk processing product. According to the method, the technical problem of flexible barrier superfine crushing of the corn stalks is innovatively solved, high-efficiency treatment and conversion of the corn stalks is realized, and the method is clean, environment-friendly and zero in discharge and has important popularization and application values.

Description

technical field [0001] The invention relates to a processing method of corn stalks, in particular to a combined processing method of high-efficiency ultrafine pulverization and enzymatic hydrolysis of corn stalks, and belongs to the field of comprehensive processing and utilization of agricultural crop stalks. Background technique [0002] my country's annual output of crop straw is more than 600 million tons, of which the output of corn straw is 270 million tons, ranking first among all kinds of straw. Compared with other crop stalks, corn stalks have the advantages of special structure, high degree of lignification, high nutrient availability, and easy collection. However, 42% of the corn stalks produced each year are directly returned to the field or returned to the field ( Preparation of silage feed), 30% is used for agricultural fuel, and the proportion of high value-added processing and utilization is less than 10%, causing serious waste and environmental pollution. I...

Claims

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Application Information

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IPC IPC(8): C12P19/14
Inventor 李永富王莉史锋陈正行
Owner JIANGNAN UNIV
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