Method and device for producing fermented feed raw material using distiller's grains

Abstract

The invention discloses a method and device for producing fermented feed raw materials by using distiller's grains. 70% of rice husks in distiller's grains dehydrated by air heat pump are separated and subjected to chemical catalytic hydrolysis treatment to produce monosaccharides, disaccharides and oligosaccharides as ideal carbon sources for microbial fermentation. Cheap inorganic nitrogen, i.e. ammonium as the main nitrogen and organic nitrogen in white distiller's grains after rice husking are used as the auxiliary nitrogen are converted into bacterial protein by domesticated hyperosmotic microorganisms, so that the crude protein content in the white distiller's grains is increased from about 15% to about 35%. This method is superior to the method of adding expensive carbon source and nitrogen source materials, and uses multiple enzymes and multiple microorganisms to decompose rice husks to produce carbon sources and ferment to produce protein feed raw materials. The process flow is simple, the production cost is low, and there are good economic and ecological benefits.

Description

Technical Field

[0001] The invention relates to the field of feed raw material processing, in particular to a method and a device for producing fermented feed raw materials by utilizing distiller's grains. Background Art

[0002] 1. my country uses 23% of its total annual grain output as feed. my country is also a country lacking in protein resources. Soybean imports account for 80% of demand. Soybean meal after oil extraction is basically used as feed protein raw material. It is of great strategic significance to use protein-containing solid waste such as liquor lees, beer lees, and vinegar lees to make fermented protein feed raw materials and reduce soybean imports.

[0003] 2. Liquor factories use grain fermentation to make liquor, which produces a large amount of liquor lees with a water content of about 80%, but rice husks account for 70% of it, which is easy to ferment and deteriorate, polluting the environment. It is not feasible to sell liquor lees directly to breeding farms as cattle and sheep feed raw materials without any treatment, which is prone to epidemic infectious diseases. According to the national standard "GB34330-2017 General Rules for Solid Waste Identification" promulgated by the Ministry of Ecological Environment Protection on August 31, 2017, "The products produced by using solid waste must meet the product quality standards of alternative raw materials formulated by the state, local governments or industry, and shall not be managed as solid waste, but in accordance with the corresponding product management." At least the feed raw material standard of dry liquor lees with a water content of ≤13% must be processed. Due to the high content of rice husks and the low crude protein content of about 15%, even if it is dehydrated to the water content standard of dry liquor lees raw materials plus the dehydration cost, the manufacturer has no economic benefits and is not very motivated.

[0004] 3. It is a good choice to pre-treat the liquor lees and then add protein-containing raw materials or non-protein nitrogen raw materials to convert them into protein nitrogen through microorganisms to increase the content to 25% or more.

[0005] 4. What method should be used for pretreatment to degrade crude fiber in rice husk into microbial fermentation? The required carbon source is a key issue. The second key issue is what cheap protein-containing raw materials should be added to increase the crude protein content. The representative practices in China are:

[0006] (1) Dry the white wine lees naturally and then screen them, remove the rice husks and use them as a fuel supplement. Add wheat bran to supplement the carbon source. (A method for producing high-protein wine lees feed disclosed in invention patent publication number CN104982651A) The problem with this method is that the yield of feed raw materials is very low due to the removal of 70% of the rice husks, and the addition of wheat bran to solve the carbon source and supplement the protein source is very costly and the economic benefits are not very good.

[0007] (2) Invention patent publication number CN108902446A discloses a high-protein white wine lees feed and its preparation method, wherein rice husk is not pretreated, wheat bran is added as a carbon source, the amount of which is 12.5%-20% of the white wine lees, silkworm pupa powder is used as a nitrogen source accounting for 12% of the fresh white wine lees, and brewer's grains with a relatively high protein content and containing about 25% crude protein are added as a supplementary nitrogen source. Non-protein nitrogen ammonia salt is added as a quick-acting nitrogen source, the amount of which is 10%-14% of the weight of the fresh white wine lees, and microorganisms that can decompose crude fiber, such as Pleurotus eryngii, Pleurotus eryngii, white rot fungi, Trichoderma and Aspergillus niger, are used to degrade cellulose, hemicellulose and lignin in rice husk in steps. Silkworm pupa powder itself contains 54% crude protein, and brewer's grains contain 25% protein, which are sufficient protein sources. The added multi-strain bacteria are all devoted to decomposing crude fiber and solving the carbon source problem, but the key problem is that no microorganisms that form new bacterial proteins are added, which is a major drawback. The remaining yeast mold in the brewer's grains and white wine grains is also inactivated. The multi-strain fermentation steps are very complicated, and the added carbon source wheat bran and protein nitrogen silkworm pupa powder are very expensive. The patented fermentation results only reduce the crude fiber content by 12%-15%, and increase the crude protein content to 25%-28%, which can be achieved without fermentation. It costs so much and the crude protein content of the fermented protein feed raw material is not high.

[0008] 5. The invention patent publication number CN1049050A discloses a method for producing protein feed raw materials by enzymatic fermentation of white wine lees. The white wine lees are pretreated and steam exploded at 180℃-250℃, pressure 0.5Mpa-2.0Mpa, and time 1min-10min. The cellulose, hemicellulose, and lignin in the rice husk can be separated, but the hemicellulose is partially degraded, and the cellulose and lignin are not degraded. However, it is conducive to the degradation of microorganisms and biological enzymes in the next step (but without the hydrolysis treatment of the present invention, it is better to degrade into sugars as an ideal carbon source for microorganisms). After the rice husk of this invention is pretreated, protease, cellulase, xylanase, phytase, amylase, and saccharification enzyme are added, but the key lignin-degrading Trichoderma and laccase are lacking. The live bacteria are tropical Candida, Bacillus, and Lactobacillus plantarum. The added xylanase, phytase, and protease are useless. The live bacteria are only tropical Candida, which can form new bacterial proteins. In short, this patent uses steam explosion pretreatment and biological enzymatic hydrolysis of raw materials, and adds live bacteria for fermentation, which ultimately increases the crude protein content of feed raw materials from 15.05% of white wine grains to 25.25%, 25.85%, and 26.14%, without adding any carbon source or nitrogen source raw materials. However, the cost of adding 6 kinds of biological enzymes is also very high, and the process flow is complicated. Summary of the invention

[0009] One of the technical problems to be solved by the present invention is to provide a method for producing fermented feed raw materials using distiller's grains with low production cost and high crude protein content in view of the above-mentioned shortcomings of the prior art in producing fermented feed raw materials using distiller's grains.

[0010] The second technical problem to be solved by the present invention is to provide a device for producing fermented feed raw materials using distiller's grains with low production cost and high crude protein content.

[0011] The method for producing fermented feed raw materials using distiller's grains as the first aspect of the present invention comprises the following steps:

[0012] Step 1: Wine lees treatment

[0013] The lees are pressurized by an air heat pump, and the pressure is released while impacting the fixed target to dehydrate the lees, and then the rice husks are separated from the lees by screening to obtain rice hulled lees;

[0014] Step 2: Adding a catalyst to the rice husk obtained in step 1 for chemical catalytic hydrolysis and then centrifuging to produce a solution containing monosaccharides, disaccharides and oligosaccharides as a microbial carbon source, and separating lignin and silicon dioxide residue as a raw material for organic fertilizer;

[0015] Step 3: Ingredients

[0016] The rice husk-removed distiller's grains obtained in step 1 and the solution containing monosaccharides, disaccharides and oligosaccharides obtained in step 2 are used as carbon sources, inorganic ammonium is used as a non-protein nitrogen source, and the corresponding domesticated and screened hypertonic bacterial solution and additives are mixed and formulated by computer in proportion;

[0017] Step 4: Fermentation

[0018] The prepared materials in step 3 are subjected to solid fermentation treatment, and the mixed nitrogen source mainly composed of monosaccharides, disaccharides, oligosaccharides and non-protein nitrogen ammonium and supplemented by organic nitrogen in lees is converted into bacterial protein feed raw materials by microorganisms;

[0019] Step 5: Dehydration and packaging

[0020] The feed raw materials in step five are dehydrated at low temperature by using an air heat pump, and then measured and packaged, and the products are put into storage.

[0021] In a preferred embodiment of the present invention, in step 1, the lees are white wine lees containing rice husk, beer lees containing rice husk or vinegar lees containing rice husk.

[0022] In a preferred embodiment of the present invention, in step one, when dehydration is performed by pressurizing and releasing the pressure of an air heat pump while impacting a fixed target, the pressure of the air heat pump is controlled at 0.1MPa-0.8MPa, the pressurization time is 10min-30min, the pressure is released to normal pressure to generate aerosol, and the impact force generated by impacting the fixed target is released for the second time to perform negative pressure dehydration in the form of aerosol. The number of reciprocating pressurization and pressure release to impact the fixed target is adjusted to a water content of 20%-50%, and the naturally generated compression heat causes the material to heat up by 60℃-90℃.

[0023] In a preferred embodiment of the present invention, in step 2, the chemical catalytic hydrolysis is controlled by an air heat pump, the pressure of the controlled air heat pump is 1.0MPa-3.0MPa, the temperature generated by the compression heat is 100°C-200°C, and the hydrolysis time is 1h-6h.

[0024] In a preferred embodiment of the present invention, in step 2, the catalyst is hydrochloric acid or an organic acid, and the added amount is based on the feed-grade industrial standard concentration, which is 2% to 8% of the dry weight of rice husk.

[0025] In a preferred embodiment of the present invention, the organic acid is one of acetic acid, propionic acid, butyric acid, and lactic acid, or a combination of any two or more thereof.

[0026] In a preferred embodiment of the present invention, in step three, the inorganic ammonium is one of liquid ammonia, aqueous ammonia, ammonium bicarbonate, and ammonium sulfate, or a mixture of any two or more thereof.

[0027] In a preferred embodiment of the present invention, in step three, the amount of inorganic ammonium added is 5%-15% of the mass of the dehulled distiller's grains calculated as N.

[0028] In a preferred embodiment of the present invention, in step three, the adapted hypertonic bacterial solution that has been domesticated and screened is a hypertonic microorganism that has been domesticated and screened multiple times at different concentrations using 5%-18% ammonium salt solution to adapt to utilizing organic protein nitrogen as a supplement and non-protein nitrogen ammonium as a main component.

[0029] In a preferred embodiment of the present invention, in step three, the adapted acclimated and screened hypertonic bacterial solution is a mixed fermentation hypertonic bacterial solution of Aspergillus niger, Aspergillus oryzae and yeast among Aspergillus fungi that have been acclimated and screened multiple times with 5%-18% ammonium salt solution at different concentrations to adapt to the use of organic protein nitrogen as a supplement and non-protein nitrogen ammonium as a main component.

[0030] In a preferred embodiment of the present invention, in step three, the additive is used to adjust the pH value of the mixed computer ingredients to a suitable value.

[0031] In a preferred embodiment of the present invention, in step three, the additive is a nutrient element necessary for microbial fermentation, specifically a salt containing calcium, magnesium, manganese and biotin.

[0032] As a second aspect of the present invention, a device for producing fermented feed raw materials using distiller's grains comprises a pressurized and depressurized shock flow dehydration device, a screening and separation device, a first air heat pump, a chemical catalytic hydrolysis device, a second air heat pump, a centrifugal separation device, a rice husk-removed distiller's grains tank, a solid fermentation device, a computer mixing and batching device, a low-temperature dehydration device, a third air heat pump, and a metering and packaging device; the feed inlet of the pressurized and depressurized shock flow dehydration device is connected to the discharge port of the distiller's grains tank, the air inlet of the pressurized and depressurized shock flow dehydration device is connected to the air outlet of the first air heat pump; the discharge port of the pressurized and depressurized shock flow dehydration device is connected to the feed inlet of the screening and separation device; the rice husk outlet of the screening and separation device is connected to the rice husk inlet of the chemical catalytic hydrolysis device; the rice husk-removed distiller's grains outlet of the screening and separation device is connected to the feed inlet of the rice husk-removed distiller's grains tank, the catalyst inlet of the chemical catalytic hydrolysis device is connected to the outlet of the catalyst tank, and the discharge port of the chemical catalytic hydrolysis device is connected to the feed port of the centrifugal separation device The air inlet of the chemical catalytic hydrolysis device is connected to the air outlet of the second air heat pump; the liquid discharge port of the centrifugal separation device is connected to the feed port of the monosaccharide, disaccharide and oligosaccharide solution of the computer mixing and batching device, the additive inlet of the computer mixing and batching device is connected to the outlet of the additive tank, the nitrogen source inlet of the inorganic ammonium of the computer mixing and batching device is connected to the outlet of the nitrogen source tank of the inorganic ammonium, the inlet of the domesticated and screened hypertonic microbial liquid of the computer mixing and batching device is connected to the outlet of the domesticated and screened hypertonic microbial liquid tank, the discharge port of the computer mixing and batching device is connected to the inlet of the solid fermentation device, the air inlet of the solid fermentation device is connected to the first outlet of the third air heat pump; the air material outlet of the solid fermentation device is connected to the feed port of the low-temperature dehydration device, the air inlet of the low-temperature dehydration device is connected to the second outlet of the third air heat pump, and the discharge port of the low-temperature dehydration device is connected to the feed port of the metering and packaging device.

[0033] Due to the adoption of the following technical solutions, the key technical features of the present invention are as follows:

[0034] 1. The rice husk in the distiller's grains is hydrolyzed into monosaccharides, disaccharides and oligosaccharides as an ideal carbon source for microbial fermentation.

[0035] 2. It is to add non-protein nitrogen ammonium as the main component and organic nitrogen in white wine lees as the auxiliary component to convert non-protein nitrogen into microbial protein by fermentation of hyperosmotic microorganisms that have been domesticated and screened to be resistant to high concentration of ammonium.

[0036] The advantages of the present invention are:

[0037] 1. No external carbon source such as wheat bran is added, nor is any nitrogen source containing protein nitrogen such as silkworm pupa powder, so as to reduce the cost of fermented feed raw materials.

[0038] 2. 70% of the rice husk is separated and hydrolyzed to produce monosaccharides, disaccharides and oligosaccharides as an ideal carbon source for microbial fermentation, which greatly reduces the crude fiber content and ensures the yield and quality of fermented feed raw materials.

[0039] 3. Use non-protein nitrogen ammonium to replace protein nitrogen to reduce the cost of fermented feed raw materials.

[0040] 4. The fermentation of a mixed strain of domesticated and screened hyperosmotic microorganisms is used for microbial transformation to convert non-protein nitrogen into bacterial protein, so that the crude protein content of the fermented feed raw materials can reach about 35%, which is higher than the crude protein content of 25%-28% of the fermented protein feed raw materials produced by traditional fermentation technology.

[0041] The present invention separates rice husks and performs chemical catalytic hydrolysis treatment which is superior to steam explosion treatment to directly hydrolyze cellulose and hemicellulose in the rice husks into small molecular monosaccharides, disaccharides and oligosaccharides, which are directly used as ideal carbon sources for microbial fermentation. The nitrogen source is inorganic ammonium with non-protein nitrogen, and fermentation microorganisms such as Aspergillus and yeasts that can utilize inorganic nitrogen as the main component and organic nitrogen, i.e. amino acid nitrogen and protein peptides, remaining in a small amount of white wine lees as the auxiliary component are used for fermentation to convert cheap inorganic nitrogen into microbial cell protein, resulting in a total crude protein content of up to 36%, and a production cost is not high, which is lower than the production cost in the above patents, a crude protein content is higher than that in the above patents, and a process flow is simpler than that in the above patents. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The present invention is a schematic flow chart of an apparatus and method for producing fermented feed raw materials using distiller's grains. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] See also Figure 1 The device for producing fermented feed raw materials using distiller's grains shown in the figure includes a pressurized and released impact flow dehydration device 10, a screening and separation device 20, a first air heat pump 30, a chemical catalytic hydrolysis device 40, a second air heat pump 170, a centrifugal separation device 50, a rice husk-removing distiller's grains tank 60, a solid fermentation device 70, a computer mixing and batching device 80, a low-temperature dehydration device 90, a third air heat pump 100, and a metering and packaging device 110.

[0045] The feed port 11 of the pressurized and pressure-released impact flow dehydration device 10 is connected to the discharge port 121 of the lees tank 120, the air inlet 12 of the pressurized and pressure-released impact flow dehydration device 10 is connected to the air outlet 31 of the first air heat pump 30; the discharge port 13 of the pressurized and pressure-released impact flow dehydration device 10 is connected to the feed port 21 of the screening and separation device 20.

[0046] The rice husk outlet 22 of the screening and separation device 20 is connected to the rice husk inlet 41 of the chemical catalytic hydrolysis device 40 ; the rice husk-removed distiller's grains outlet 23 of the screening and separation device 20 is connected to the feed inlet 61 of the rice husk-removed distiller's grains tank 60 .

[0047] The catalyst inlet 42 of the chemical catalytic hydrolysis device 40 is connected to the outlet 131 of the catalyst tank 130 , the discharge port 43 of the chemical catalytic hydrolysis device 40 is connected to the feed port 51 of the centrifugal separation device 50 , and the air inlet 44 of the chemical catalytic hydrolysis device 40 is connected to the air outlet 171 of the second air heat pump 170 .

[0048] The liquid discharge port 52 of the centrifugal separation device 50 is connected to the monosaccharide, disaccharide and oligosaccharide solution feed port 81 of the computer mixing and batching device 80, and the solid discharge port 53 of the centrifugal separation device 50 outputs lignin and silicon dioxide residue.

[0049] The additive inlet 82 of the computer mixing and batching device 80 is connected to the outlet 141 of the additive tank 140, the inorganic ammonium nitrogen source inlet 83 of the computer mixing and batching device 80 is connected to the outlet 151 of the inorganic ammonium nitrogen source tank 150, the domesticated and screened hypertonic microbial liquid inlet 84 of the computer mixing and batching device 80 is connected to the outlet 161 of the domesticated and screened hypertonic microbial liquid tank 160, the dehulled rice lees 85 of the computer mixing and batching device 80 is connected to the discharge port 62 of the dehulled rice lees tank 60, and the discharge port 86 of the computer mixing and batching device 80 is connected to the inlet 71 of the solid fermentation device 70.

[0050] The air inlet 72 of the solid fermentation device 70 is connected to the first outlet 101 of the third air heat pump 100; the air material outlet 74 of the solid fermentation device 70 is connected to the feed port 91 of the low-temperature dehydration device 90, the air inlet 92 of the low-temperature dehydration device 90 is connected to the second outlet 102 of the third air heat pump 100, and the discharge port 93 of the low-temperature dehydration device 90 is connected to the feed port 111 of the metering and packaging device 110.

[0051] The lees of the present invention are white wine lees containing rice husks, beer lees containing rice husks or vinegar lees containing rice husks. The method of using white wine lees to produce fermented feed raw materials is described below by taking white wine lees as an example.

[0052] The method for producing fermented feed raw materials using distiller's grains comprises the following steps:

[0053] Step 1: Add the white wine lees with a water content of about 80% into the pressurized and depressurized impact flow dehydration device 10, and use the first air heat pump 30 to pressurize, release the pressure to normal pressure, and impact the fixed target at the same time to generate aerosol for dehydration. The pressure of the air heat pump is controlled at 0.4Mpa, the pressurization time is 10min, the pressure is released to normal pressure to generate aerosol, and the impact force generated by impacting the fixed target is released for dehydration in the form of aerosol. The number of reciprocating pressurization and depressurization to impact the fixed target is based on the water content reaching 40%, and the number of reciprocating times is 3 times. The naturally generated compression heat heats the material to 60°C for screening, and separates the rice husk and other white wine lees.

[0054] Step 2: The separated rice husks are sent to the chemical catalytic hydrolysis device 40, and the catalyst hydrochloric acid is added to the chemical catalytic hydrolysis device 40 with a standard concentration of 37% as the base and an amount of 3% of the dry weight of the rice husks is added to prepare a hydrochloric acid solution with a concentration of 10%. The pressure of the second air heat pump 170 controlled by the catalytic hydrolysis is 0.9 MPa, and the temperature generated by the compression heat is 160°C. After the hydrolysis time is 2 hours, the solution containing monosaccharides, disaccharides and oligosaccharides is centrifuged to separate as a carbon source for microorganisms, and no external carbon source is added. The solid phase separated by centrifugation is unhydrolyzed lignin and silicon dioxide as raw materials for producing organic fertilizer.

[0055] Step 3: Add ammonium bicarbonate and ammonium sulfate in a ratio of 1:1 to the carbon source of monosaccharide, disaccharide and oligosaccharide solution and the nitrogen source of inorganic ammonium as fermentation material, with N accounting for 5% of the fermentation material. In addition to the nitrogen source additive, various microbial cultures are sequentially added with 5%, 10%, 15%, and 18% ammonium bicarbonate and ammonium sulfate in a ratio of 1:1 to perform acclimatization screening of different concentrations of strains and prepare hypertonic microbial cultures, which is already a public mature technology. The additives are essential nutrients for microbial fermentation, specifically salts containing calcium, magnesium, manganese and biotin, which are mature technologies.

[0056] The microbial strains are hyperosmotic Aspergillus niger and hyperosmotic yeast that can utilize inorganic nitrogen as the main and organic nitrogen as the auxiliary. The appropriate pH is adjusted to 4.5. The hyperosmotic bacterial liquid prepared by domestication screening is mixed with monosaccharide, disaccharide, oligosaccharide bacterial liquid and white wine lees solid material containing 5% of ammonium bicarbonate and ammonium sulfate in a ratio of 1:1 and additives are mixed in proportion by computer mixing and batching device 80 and sent to solid fermentation device 70 for solid fermentation. The computer batching ratio and fermentation technology are mature and known public technologies. The water content is controlled at 55%, and the solid fermentation is carried out. The hyperosmotic microorganisms Aspergillus niger and yeast convert the carbon source and non-protein nitrogen ammonium bicarbonate and ammonium sulfate into bacterial protein and the remaining non-protein nitrogen, which meets the standard requirements. The fermentation control conditions are mature and public technologies. After the fermentation is completed, the air heat pump temperature is controlled at 60°C for drying and dehydration to a water content of ≤13%, which is a fermented protein feed raw material, containing up to 36.2% crude protein. The crude fiber is 6.98%, and the crude ash content is 12.96%.

Claims

1. A method for producing fermented feed raw materials using distiller's grains, characterized in that: The steps include: Step 1: Wine lees treatment The lees are dehydrated by pressurizing and releasing the pressure with an air heat pump and simultaneously impacting a fixed target, and then the lees are screened to separate the rice husks in the lees to obtain the rice hull-removed lees; in step 1, the pressure of the air heat pump is controlled at 0.1MPa-0.8MPa when dehydrating by pressurizing and releasing the pressure with an air heat pump and simultaneously impacting a fixed target, the pressurization time is 10min-30min, the pressure is released to normal pressure to generate aerosol, and the impact force generated by impacting the fixed target is released twice to dehydrate in the form of negative pressure, and the number of reciprocating pressurization and pressure release to impact the fixed target is made so that the water content reaches 20%-50%, and the naturally generated compression heat causes the material to heat up by 60℃-90℃; Step 2: Adding a catalyst to the rice husk obtained in step 1 for chemical catalytic hydrolysis and then centrifuging to produce a solution containing monosaccharides, disaccharides and oligosaccharides as a microbial carbon source, and separating lignin and silicon dioxide residue as a raw material for organic fertilizer; In step 2, the chemical catalytic hydrolysis is controlled by an air heat pump, the pressure of the controlled air heat pump is 1.0MPa-3.0MPa, the temperature generated by the compression heat is 100°C-200°C, and the hydrolysis time is 1h-6h; Step 3: Ingredients The hulled distiller's grains obtained in step 1 and the solution containing monosaccharides, disaccharides and oligosaccharides obtained in step 2 are used as carbon sources, inorganic ammonium is used as a non-protein nitrogen source, and the corresponding domesticated and screened hypertonic bacterial solution and additives are mixed and formulated by computer in proportion; in step 3, the corresponding domesticated and screened hypertonic bacterial solution is a hypertonic microorganism that is domesticated and screened multiple times with 5%-18% ammonium salt solution at different concentrations to adapt to the use of organic protein nitrogen as a supplement and non-protein nitrogen ammonium as a main source; Step 4: Fermentation The prepared materials in step 3 are subjected to solid fermentation treatment, and the mixed nitrogen source mainly composed of monosaccharides, disaccharides, oligosaccharides and non-protein nitrogen ammonium and supplemented by organic nitrogen in lees is converted into bacterial protein feed raw materials by microorganisms; Step 5: Dehydration and packaging The feed raw materials in step five are dehydrated at low temperature by using an air heat pump, and then measured and packaged, and the products are put into storage.

2. The method for producing fermented feed raw materials using distiller's grains as claimed in claim 1, characterized in that: In step 1, the lees are white wine lees containing rice husk, beer lees containing rice husk or vinegar lees containing rice husk.

3. The method for producing fermented feed raw materials using distiller's grains as claimed in claim 1, characterized in that: In step 2, the catalyst is hydrochloric acid or organic acid, and the added amount is based on the feed-grade industrial standard concentration, which is 2%-8% of the dry weight of rice husk.

4. A method for producing fermented feed raw materials using distiller's grains as claimed in claim 3, characterized in that: The organic acid is one of acetic acid, propionic acid, butyric acid, and lactic acid, or a combination of any two or more thereof.

5. The method for producing fermented feed raw materials using distiller's grains as claimed in claim 1, characterized in that: In step 3, the inorganic ammonium is one of liquid ammonia, aqueous ammonia, ammonium bicarbonate, and ammonium sulfate, or a mixture of any two or more thereof.

6. A method for producing fermented feed raw materials using distiller's grains as claimed in claim 5, characterized in that: In step 3, the amount of inorganic ammonium added is 5%-15% of the mass of the dehulled distiller's grains calculated as N.

7. The method for producing fermented feed raw materials using distiller's grains as claimed in claim 1, characterized in that: The hypertonic microorganism mainly containing non-protein nitrogen ammonium is a mixed fermentation hypertonic bacterial liquid of Aspergillus niger, Aspergillus oryzae and yeast among Aspergillus fungi.

8. The method for producing fermented feed raw materials using distiller's grains as claimed in claim 1, characterized in that: In step three, the additive is used to adjust the pH value of the mixed computer ingredients to be appropriate.

9. A method for producing fermented feed raw materials using distiller's grains as claimed in claim 8, characterized in that: In step three, the additives are essential nutrients for microbial fermentation, specifically salts containing calcium, magnesium, manganese and biotin.

10. A device for realizing the method of producing fermented feed raw materials using distiller's grains as described in any one of claims 1 to 9 comprises a pressurized and depressurized shock flow dehydration device, a screening and separation device, a first air heat pump, a chemical catalytic hydrolysis device, a second air heat pump, a centrifugal separation device, a rice husk-removed distiller's grains tank, a solid fermentation device, a computer mixing and batching device, a low-temperature dehydration device, a third air heat pump, and a metering and packaging device; the feed inlet of the pressurized and depressurized shock flow dehydration device is connected to the discharge port of the distiller's grains tank, the air inlet of the pressurized and depressurized shock flow dehydration device is connected to the air outlet of the first air heat pump; the discharge port of the pressurized and depressurized shock flow dehydration device is connected to the feed inlet of the screening and separation device; the rice husk outlet of the screening and separation device is connected to the rice husk inlet of the chemical catalytic hydrolysis device; the rice husk-removed distiller's grains outlet of the screening and separation device is connected to the feed inlet of the rice husk-removed distiller's grains tank, the catalyst inlet of the chemical catalytic hydrolysis device is connected to the outlet of the catalyst tank, and the discharge port of the chemical catalytic hydrolysis device is connected to the centrifugal separation device. The feed port of the device is connected, the air inlet of the chemical catalytic hydrolysis device is connected to the air outlet of the second air heat pump; the liquid discharge port of the centrifugal separation device is connected to the feed port of the monosaccharide, disaccharide and oligosaccharide solution of the computer mixing and batching device, the additive inlet of the computer mixing and batching device is connected to the outlet of the additive tank, the nitrogen source inlet of the inorganic ammonium of the computer mixing and batching device is connected to the outlet of the nitrogen source tank of the inorganic ammonium, the inlet of the domesticated and screened hypertonic microbial liquid of the computer mixing and batching device is connected to the outlet of the domesticated and screened hypertonic microbial liquid tank, the discharge port of the computer mixing and batching device is connected to the inlet of the solid fermentation device, the air inlet of the solid fermentation device is connected to the first outlet of the third air heat pump; the air material outlet of the solid fermentation device is connected to the feed port of the low-temperature dehydration device, the air inlet of the low-temperature dehydration device is connected to the second outlet of the third air heat pump, and the discharge port of the low-temperature dehydration device is connected to the feed port of the metering and packaging device.

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