Straw treatment process for improving fermentation efficiency of corn straw

A corn stalk and fermentation efficiency technology, applied in the biological field, can solve problems such as the inability to maintain the continuity of the heat transfer channel, the unfavorable heat transfer of the material layer, and the fault of the heat transfer channel, so as to achieve low-cost resource utilization and facilitate the growth of microorganisms , Improve the effect of compactness

Inactive Publication Date: 2020-04-17

安徽正基生态农业有限公司

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AI-Extracted Technical Summary

Problems solved by technology

Simple puffing treatment of corn stalks can achieve rapid start-up of fermentation and increase fermentation efficiency to a certain extent, but as the fermentation progresses, the growth of microorganisms on the surface of the material changes the porosity of the material layer, making the material layer The distance between them in...

Method used

Choose the corn stalk starter 200g that Hebi City Tian Muyang Biotechnology Co., Ltd. produces, sprinkle on the corn stalk to be fermented that 100kg present embodiment improves and stir, fermented corn stalk moisture is adjusted to 65%, corn stalk After the straw was compacted and sealed, it was fermented. It was observed that the corn straw had been decomposed for 4 days. After the fermentation, the total organic matter content was 62.3%, the total nutrient (calculated on a dry basis) was 21.6%, and the number of viable bacteria was 2.8×1010cfu/ml; Sprinkle the same 200g of corn stalk starter on 100kg of untreated corn stalks and stir ev...

Abstract

The invention discloses a straw treatment process for improving the fermentation efficiency of corn straw and relates to the field of biotechnology. The straw treatment process comprises the followingspecific processes that 1), a chitosan solution and a nanocellulose aqueous solution are mixed, then N-N methylene bisacrylamide is added, gel is placed in a mold, and nano-nano cellulose/chitosan composite aerogel is obtained; 2), the silica functionalized nano nano-cellulose/chitosan composite aerogel is prepared; 3), the corn straw is immersed in zinc carbonate dispersion liquid and then takenout and dried; and 4), the silica functionalized nano-cellulose/ chitosan composite aerogel and the heat-treated corn straw are uniformly mixed and compacted through a compactor, and then the corn straw to be fermented can be obtained. According to the straw treatment process for improving the fermentation efficiency of the corn straw, the temperature of a material layer in the fermentation process of the corn straw to be fermented can be balanced, so that microbial growth is facilitated, the fermentation efficiency is improved, and the yield of the organic substance is increased, so that theutilization rate of the corn straw is increased, and the efficient and low-cost resource utilization of the corn straw is realized.

Application Domain

Solid waste disposalTransportation and packaging +1

Technology Topic

Corn stoverMicrobiological growth +7

Examples

Experimental program(3)

Example Embodiment

[0014] Example 1

[0015] A straw treatment process for improving the fermentation efficiency of corn straw, the specific process method is as follows:

[0016] 1) At room temperature, according to the volume ratio of 1:1, add the 3% concentration of chitosan solution to the 3% concentration of nanocellulose aqueous solution, and then slowly add 0.02% of the nanocellulose aqueous solution weight of NN methylene Base bisacrylamide, stirred at a speed of 80r/min for 2h to form a uniform dispersion system, then put the solution in a mold, let it stand at room temperature until the gel is stably formed, and then place it in a 50% tert-butyl Perform solvent replacement in the alcohol solution for 30 hours, and replace the solution every 8 hours during the replacement process. After the replacement is completed, freeze-dry at -55°C for 25 hours to obtain nano-nanocellulose/chitosan composite aerogel;

[0017] 2) Immerse the nano-nanocellulose/chitosan composite aerogel into the mixed solution of tetramethylorthosilicate and absolute ethanol with a volume ratio of 1:1, keep it for 30 minutes, and then immerse the nano-nanocellulose/shell The polyglycan composite aerogel is taken out, washed with absolute ethanol and then immersed in a mixture of absolute ethanol and water with a volume ratio of 3:1. Adjust the pH to 3 and keep it for 2 hours. Take out the product and put it in with distilled water. In an autoclave, hydrothermally reacted at 120°C for 6 hours, then freeze-dried at -40°C for 35 hours to obtain silica-functionalized nanocellulose/chitosan composite aerogel;

[0018] 3) Add zinc carbonate powder to water, shake and disperse under 400W ultrasonic for 35 minutes to obtain a zinc carbonate dispersion with a content of 10%, then chop corn stalks and immerse in the zinc carbonate dispersion, soak for 1 hour at room temperature, and wait for soaking After the end, take out the corn stover, heat it at 110℃ for 2h, and then cool it to room temperature naturally;

[0019] 4) According to the mass ratio of 1:35, mix the silica-functionalized nano-cellulose/chitosan composite aerogel with the heat-treated corn stalks evenly, and the corn stalks to be fermented can be obtained after being compacted by a compactor .

[0020] Select 200g of corn stalk starter produced by Hebi Tianmuyang Biological Technology Co., Ltd., sprinkle on 100kg of the corn stalks to be fermented raised in this embodiment and stir evenly, adjust the moisture of the fermented corn stalks to 65%, and compact the corn stalks Fermentation is carried out after sealing. According to observation, the maturity time of the corn stalks is 4 days. After the fermentation, the total organic matter content is 62.3%, the total nutrients (on a dry basis) is 21.6%, and the number of viable bacteria is 2.8×10 10 cfu/ml; Sprinkle the same 200g corn stalk starter on 100 kg of untreated corn stalks and stir evenly, adjust the moisture of the fermented corn stalks to 65%, and press and seal the corn stalks for fermentation. After observation, the The maturity time of corn stalks is 10 days, the total organic matter content after fermentation is 41.5%, the total nutrients (calculated on a dry basis) are 13.7%, and the number of viable bacteria is 1.1×10 10 cfu/ml, it can be seen that the processing of corn stalks in the present invention improves fermentation efficiency, increases the output of organic matter, thereby improves the utilization rate of corn stalks, and realizes high-efficiency and low-cost resource utilization of corn stalks.

Example Embodiment

[0021] Example 2

[0022] A straw treatment process for improving the fermentation efficiency of corn straw, the specific process method is as follows:

[0023] 1) At room temperature, add a 4% chitosan solution to a 5% nanocellulose aqueous solution according to a volume ratio of 1:1, and then slowly add 0.03% NN methylene by weight of the nanocellulose aqueous solution Base bisacrylamide, stirred for 1.5h at a speed of 100r/min to form a uniform dispersion system, then put the solution in a mold, let it stand at room temperature until the gel is stably formed, and then place it in a 60% tertiary Perform solvent replacement in the butanol solution for 25 hours, and replace the solution every 7 hours during the replacement process. After the replacement is completed, freeze-dry at -58°C for 23 hours to obtain nano-nanocellulose/chitosan composite aerogel;

[0024] 2) Immerse the nano-nanocellulose/chitosan composite aerogel into the mixed solution of tetramethylorthosilicate and absolute ethanol with a volume ratio of 1:1, keep it for 35 minutes, and then immerse the nano-nanocellulose/shell The polyglycan composite aerogel was taken out, washed with absolute ethanol, and immersed in a mixture of absolute ethanol and water with a volume ratio of 3.5:1, adjusted to pH 3, maintained for 2.5h, removed the product, and placed it with distilled water Put it in an autoclave, hydrothermally react at 125°C for 5 hours, and then freeze-dry at -45°C for 32 hours to obtain a silica-functionalized nanocellulose/chitosan composite aerogel;

[0025] 3) Add zinc carbonate powder to water, shake and disperse under 500W ultrasonic for 30min to obtain a zinc carbonate dispersion with a content of 12%, then chop corn stalks and immerse in the zinc carbonate dispersion, soak for 1.5h at room temperature, and wait. After soaking, take out the corn stover, heat it at 120℃ for 1.5h, and then cool it to room temperature naturally;

[0026] 4) According to the mass ratio of 1:37, mix the silica-functionalized nano-cellulose/chitosan composite aerogel with the heat-treated corn stalks evenly, and the corn stalks to be fermented can be obtained after being compacted by a compactor .

Example Embodiment

[0027] Example 3

[0028] A straw treatment process for improving the fermentation efficiency of corn straw, the specific process method is as follows:

[0029] 1) At room temperature, according to the volume ratio of 1:1, add the chitosan solution with a concentration of 5% to the aqueous solution of nanocellulose with a concentration of 7%, and then slowly add the NN methylene 0.04% by weight of the nanocellulose aqueous solution Base bisacrylamide, stirred at 120r/min for 1h to form a uniform dispersion system, then put the solution in the mold, let it stand at room temperature until the gel is stable and formed, and then place it in 70% tert-butyl Perform solvent replacement in the alcohol solution for 20 hours, and replace the solution every 6 hours during the replacement process. After the replacement is completed, freeze-dry at -60°C for 20 hours to obtain the nano-nanocellulose/chitosan composite aerogel;

[0030] 2) Immerse the nano-nanocellulose/chitosan composite aerogel into the mixed solution of tetramethylorthosilicate and absolute ethanol with a volume ratio of 1:1, keep it for 40 minutes, and then immerse the nano-nanocellulose/shell The polyglycan composite aerogel is taken out, washed with absolute ethanol and then immersed in a 4:1 volume ratio of absolute ethanol and water mixture, adjusted to pH 4, kept for 3 hours, taken out the product, and put it in with distilled water In an autoclave, hydrothermally reacted at 130°C for 3h, and then freeze-dried at -50°C for 30h to obtain silica-functionalized nanocellulose/chitosan composite aerogel;

[0031] 3) Add zinc carbonate powder to water, shake and disperse under 600W ultrasonic for 25min to obtain a zinc carbonate dispersion with a content of 15%, then chop corn stalks and immerse in the zinc carbonate dispersion, soak for 2h at room temperature, and wait for soaking After the end, take out the corn stover, heat it at 130℃ for 1h, and then cool it to room temperature naturally;

[0032] 4) According to the mass ratio of 1:40, mix the silica-functionalized nano-cellulose/chitosan composite aerogel with the heat-treated corn stalks uniformly, and the corn stalks to be fermented can be obtained after being compacted by a compactor .

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Classification and recommendation of technical efficacy words

Improve compactness
avoid death

Straw treatment process for improving fermentation efficiency of corn straw

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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