Method and device for degrading aflatoxin

Abstract

The present invention provides a method for degrading aflatoxin, comprising the steps of crushing a solid material containing aflatoxin to make it in a fluidized state, and performing plasma treatment on the material in the fluidized state under a humidity environment of at least 70%; the gases introduced into the plasma treatment are ozone and NOx. The present invention also includes a device for degrading aflatoxin, comprising a fluidized bed and a plasma device; the fluidized bed is provided with a spray unit and a humidity control unit, the spray unit can spray atomized water into the fluidized bed, the humidity control unit is connected to the spray unit, and the water spraying amount of the spray unit can be controlled by the humidity control unit; the plasma device is connected to the fluidized bed, and ozone and NOx gas can be introduced into the fluidized bed. The present invention can destroy the structure of aflatoxin, achieve the purpose of thorough disinfection, and can also disinfect other pollutants, such as bacteria, molds, spores, vomitoxin, etc.

Description

Technical Field

[0001] The invention relates to a method and a device for degrading aflatoxin. Background Art

[0002] Aflatoxin, also known as aflatoxin, is a class of chemical compounds with similar chemical structures, derivatives of dihydrofuranocoumarin, produced by several molds such as Aspergillus flavus and Aspergillus parasiticus in moldy grains. Aflatoxin is mainly a secondary metabolite synthesized by complex enzymatic reactions of fungi such as Aspergillus flavus and Aspergillus parasiticus under certain environmental conditions. At present, a total of 18 species have been identified, which are divided into two major categories, B and G. Metabolism in animals can produce a variety of homologous derivatives such as aflatoxin M1 and M2. It causes serious pollution to grain and feed, among which aflatoxin B1 is the most toxic substance among aflatoxins. Aflatoxin mainly acts on the liver and causes liver lesions. Eating food containing aflatoxin can cause acute poisoning in humans and animals and thus cause diseases. Aflatoxin has strong carcinogenic effects, causes gene mutations and teratogenesis, and seriously threatens the health of animals and humans. How to remove aflatoxin from grain and feed has attracted widespread attention.

[0003] At present, the detoxification method of materials containing aflatoxin is mainly physical adsorption. For example, researchers have conducted in-depth research on the removal effect and mechanism of aflatoxin in peanut meal by various adsorbents such as montmorillonite, activated carbon, diatomaceous earth, and modified adsorbents. For example, Youjun Deng et al. confirmed the effectiveness of montmorillonite in adsorbing aflatoxin and deeply analyzed the binding mode between montmorillonite and aflatoxin molecules. In addition, researchers have also conducted a large number of animal toxicity tests such as tilapia, chicken, pig, duck, and sheep. For example, Abdel-Wahhab et al. conducted a toxicity test on bentonite on tilapia, confirming that bentonite has a certain adsorption capacity and high safety. This method mainly avoids the toxicity of aflatoxin to living organisms by reducing bioavailability. Since the active ingredients in low-temperature plasma have a certain disinfecting effect on various types of pollutants such as aflatoxin, low-temperature plasma provides a more environmentally friendly and safer detoxification mode.

[0004] Therefore, the present invention designs a process route for treating aflatoxin-containing solid materials by combining a fluidized bed and low-temperature plasma. The fluidized bed uses air to pass through a granular solid layer to put the aflatoxin-containing material in a suspended motion state. When the air passes through the material, the active ingredients generated by the jet low-temperature plasma are brought in, so that they are fully in contact with the pollutants in the material, thereby ensuring the disinfection effect and efficiency. Compared with a solution or water system, this process is a dry process, does not produce any pollutants, is environmentally friendly, has low energy consumption, and has a good disinfection effect. Summary of the invention

[0005] The first aspect of the present invention aims to provide a method for degrading aflatoxin, comprising the steps of crushing a solid material containing aflatoxin to make it in a fluidized state, and subjecting the fluidized material to plasma treatment in an environment with a humidity of at least 70%; the gases introduced into the plasma treatment are ozone and NOx.

[0006] The fluidized state described in the present invention is a conventional term in the art, and refers to a state in which solid particles are constantly floating and tumbling under the action of a fluid.

[0007] Ozone is a strong oxidant with a reduction potential of +2.07V, second only to fluorine. When ozone is in water, it undergoes a reduction reaction, producing single-atom oxygen (O) and hydroxyl (•OH) with extremely strong oxidizing ability, which can instantly decompose organic matter in water. The redox potential of hydroxyl is 2.80V, which is equivalent to the oxidizing ability of fluorine. It is a strong oxidant and catalyst, which can cause a chain reaction in organic matter, and the reaction is very rapid. Therefore, when ozone is dissolved in water, it can not only break the carbon chains of ene and alkynes in the structure of aflatoxin, but also has a strong oxidizing effect on its dichlorovinyl, nitro, methoxy, amino and other groups. This dual effect of breaking the connecting bond and group oxidation causes a complete change in the molecular structure of the above substances, thereby playing a role in detoxification and reducing pesticide residues. Most of the products after ozone oxidation are non-toxic and more hydrophilic than the substrate, and can be removed by water washing, while ozone itself decomposes into oxygen and will not cause secondary pollution.

[0008] Plasma technology is to discharge in the atmosphere. Various excited particles and high-energy electrons at the microscopic level have relatively high chemical activity. High-energy particles and free electrons will collide, thereby generating a large number of active free radicals (-OH; O2-, H2O2, O3, etc.). These high-energy particles can break the molecular bonds of chemical pollutants and form low-toxic or non-toxic small molecules. Plasma is efficient, low-temperature, free of solvent residues, and environmentally friendly during the treatment process, and can protect the nutrients in the material from being destroyed.

[0009] The plasma device described in the present invention is preferably a low-temperature plasma device, which can be in the form of a glow discharge jet, or in the form of a dielectric barrier discharge (DBD), a radio frequency discharge jet, a corona discharge jet, or the like.

[0010] The plasma device in the present invention discharges to generate high-energy electrons, which then excite nitrogen molecules in the air to generate NO, the initial component of nitrogen oxides. Subsequently, NO further reacts with ozone and oxygen to convert into nitrogen oxides. Due to the complexity of the plasma composition, the mechanism is relatively complicated. Among them, the main component of nitrogen oxides NOx is N 2 O 4 、 NO2 、 NO 5 and NO 3 , also known as reactive nitrides (RNS).

[0011] In one or more embodiments, the solid material is one or more of agricultural products, feed raw materials, processed agricultural products or feed; the agricultural products are peanuts, corn, sorghum, rice, millet, wheat, soybeans or nuts; the feed raw materials are bran, soybean meal, corn germ meal, cottonseed meal, peanut meal or rapeseed meal.

[0012] In one or more embodiments, the solid material containing aflatoxin is crushed to 20-60 mesh before entering the fluidized bed.

[0013] In one or more embodiments, the moisture content of the solid material is controlled to be 10-30%.

[0014] In one or more embodiments, if the moisture content of the solid material is greater than 30%, it is dried to a moisture content of 10-30%. The drying method can adopt existing conventional methods, such as oven drying, freeze drying, fluidized bed drying and flash drying.

[0015] In one or more embodiments, if the moisture content of the solid material is less than 10%, it is moistened to a moisture content of 10-30%. The moistening method may adopt existing conventional methods, such as spray moistening, high-pressure micro-mist humidification, steam humidification, and ultrasonic humidification.

[0016] In one or more embodiments, a fluidized bed apparatus is used to fluidize the pulverized material.

[0017] In one or more embodiments, the humid environment in which the fluidized material is located refers to an air humidity of 70-100%.

[0018] In one or more embodiments, the concentration of ozone in the gas introduced into the plasma treatment is greater than 1500 ppm, and the concentration of NOx is greater than 300 ppm.

[0019] In one or more embodiments, the ozone concentration may be 1500-2000 ppm, such as 1500-1600 ppm, 1600-1700 ppm, 1700-1800 ppm, 1800-1900 ppm, 1900-2000 ppm; the ozone concentration may also be 2000-4000 ppm, such as 3000-4000 ppm.

[0020] In one or more embodiments, the NOx concentration may be 300-1000ppm, such as 300-400ppm, 400-500ppm, 500-600ppm, 600-700ppm, 700-800ppm, 800-900ppm, 900-1000ppm; the NOx concentration may be 1000-2000ppm, such as 1000-1500ppm, 1500-2000ppm, etc.

[0021] In one or more embodiments, the method for degrading aflatoxin comprises the following steps:

[0022] (1) Grinding the solid material containing aflatoxin to 20-60 mesh, wherein the water content of the material is 10-30% of its mass;

[0023] (2) Load the crushed material into the fluidized bed and adjust the air pressure to 0.3-0.8 mbar to keep it in a fluidized state;

[0024] (3) Spray atomized water into the fluidized bed containing the crushed material to make the air humidity inside the fluidized bed 70-100%;

[0025] (4) Using a low-temperature plasma device, ozone and NOx gases are introduced into the fluidized bed in step (3); the concentration of the ozone is greater than 1500 ppm, and the concentration of the NOx is greater than 300 ppm.

[0026] The second aspect of the present invention aims to provide a device for degrading aflatoxin, comprising a fluidized bed and a plasma device; the fluidized bed is provided with a spray unit and a humidity control unit, the spray unit can spray atomized water into the fluidized bed, the humidity control unit is connected to the spray unit, and the water spraying amount of the spray unit can be controlled by the humidity control unit; the plasma device is connected to the fluidized bed, and ozone and NOx gas can be introduced into the fluidized bed.

[0027] The third aspect of the present invention aims to provide the use of the above-mentioned device in degrading aflatoxin contained in solid materials.

[0028] The fourth aspect of the present invention aims to provide a method for preparing feed for livestock and poultry, the method comprising:

[0029] 1) a step of treating solid materials using any of the methods of the present invention; and

[0030] 2) a step of preparing the feed using the solid material obtained in step 1);

[0031] In one or more embodiments, preferably, the step 2) comprises the step of directly mixing the material obtained in step 1) with other ingredients, or fermenting the material obtained in step 1) and then mixing it with other ingredients, or puffing the material obtained in step 1) and then mixing it with other ingredients to prepare the feed.

[0032] The ingredients in the preparation of the above feed can be any common ingredients in existing feed formulas, such as lactose, rice protein, vegetable oil, calcium hydrogen phosphate, stone powder, fish meal, various amino acids, various trace elements, various minerals, various vitamins, yeast nucleic acid, salt, citric acid, zinc oxide, organic iron, flavoring agent, choline and the like in any combination.

[0033] The peanut meal and corn meal treated by the method of the present invention can be used as a plant-derived protein feed and energy feed for the preparation of formula feed. The feed preparation method of the present invention can adopt existing conventional methods, such as cleaning, crushing, batching, mixing, post-processing (conditioning, puffing, granulation, drying, sieving), packaging, transportation and storage of the treated materials to prepare feed for laying hens or pig feed and other livestock and poultry.

[0034] Compared with the existing adsorption method, the low-temperature plasma of the present invention can destroy the structure of aflatoxin, achieve the purpose of thorough disinfection, and at the same time, can also disinfect other pollutants, such as bacteria, mold, spores, vomitoxin, etc., making the peanut meal treated by low-temperature plasma safer. The combined fluidized bed allows the active ingredients of the low-temperature plasma to fully contact with pollutants such as aflatoxin, thereby improving the disinfection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a diagram of the device for degrading aflatoxin described in the present invention. DETAILED DESCRIPTION

[0036] The following is a detailed description of the present invention. The following description of the technical features is based on representative embodiments and specific examples of the present invention, but the present invention is not limited to these embodiments and specific examples. It should be noted that:

[0037] It should be understood that within the scope of the present invention, the above-mentioned technical features of the present invention and the technical features specifically described below (such as embodiments) can be combined with each other to form a preferred technical solution.

[0038] In order to enable those skilled in the art to understand the characteristics and effects of the present invention, the following is a general description and definition of the terms and expressions mentioned in the specification and claims. Unless otherwise specified, all technical and scientific terms used in the text are the common meanings understood by those skilled in the art for the present invention. In the event of a conflict, the definition in this specification shall prevail.

[0039] The theories or mechanisms described and disclosed herein, whether correct or incorrect, should not limit the scope of the present invention in any way, that is, the present invention can be implemented without being limited by any specific theory or mechanism.

[0040] In this article, all features such as values, quantities, contents and concentrations defined in the form of numerical ranges or percentage ranges are for simplicity and convenience only. Accordingly, the description of numerical ranges or percentage ranges should be considered to have included and specifically disclosed all possible secondary ranges and individual values ​​within the range (including integers and fractions). In this article, unless otherwise specified, percentages refer to mass percentages.

[0041] In this document, in order to make the description concise, not all possible combinations of various technical features in various embodiments or examples are described. Therefore, as long as there is no contradiction in the combination of these technical features, the various technical features in various embodiments or examples can be combined arbitrarily, and all possible combinations should be considered to be within the scope of this specification.

[0042] The first aspect of the present invention aims to provide a method for degrading aflatoxin, comprising the steps of crushing a solid material containing aflatoxin to make it in a fluidized state, and subjecting the fluidized material to plasma treatment in an environment with a humidity of at least 70%; the gases introduced into the plasma treatment are ozone and NOx.

[0043] Ozone is a strong oxidant with a reduction potential of +2.07V, second only to fluorine. When ozone is in water, it undergoes a reduction reaction, producing single-atom oxygen (O) and hydroxyl (•OH) with extremely strong oxidizing ability, which can instantly decompose organic matter in water. The redox potential of hydroxyl is 2.80V, which is equivalent to the oxidizing ability of fluorine. It is a strong oxidant and catalyst, which can cause a chain reaction in organic matter, and the reaction is very rapid. Therefore, when ozone is dissolved in water, it can not only break the carbon chains of ene and alkynes in the structure of aflatoxin, but also has a strong oxidizing effect on its dichlorovinyl, nitro, methoxy, amino and other groups. This dual effect of breaking the connecting bond and group oxidation causes a complete change in the molecular structure of the above substances, thereby playing a role in detoxification and reducing pesticide residues. Most of the products after ozone oxidation are non-toxic and more hydrophilic than the substrate, and can be removed by water washing, while ozone itself decomposes into oxygen and will not cause secondary pollution.

[0044] Plasma technology is to discharge in the atmosphere. Various excited particles and high-energy electrons at the microscopic level have relatively high chemical activity. High-energy particles and free electrons will collide, thereby generating a large number of active free radicals (-OH; O2-, H2O2, O3, etc.). These high-energy particles can break the molecular bonds of chemical pollutants and form low-toxic or non-toxic small molecules. Plasma is efficient, low-temperature, free of solvent residues, and environmentally friendly during the treatment process, and can protect the nutrients in the material from being destroyed.

[0045] In one or more specific embodiments, the NOx component is N 2 O 4 、 NO 2 、 NO 5 and NO 3 mixture.

[0046] In one or more specific embodiments, the solid material is one or more of agricultural products, feed raw materials, processed agricultural products or feed; the agricultural products are peanuts, corn, sorghum, rice, millet, wheat, soybeans or nuts; the feed raw materials are bran, soybean meal, corn germ meal, cottonseed meal, peanut meal or rapeseed meal.

[0047] In one or more specific embodiments, the solid material containing aflatoxin is crushed to 20-60 mesh before entering the fluidized bed.

[0048] In one or more specific embodiments, the moisture content of the solid material is controlled to be 10-30%; if the moisture content of the solid material is greater than 30%, it is dried to a moisture content of 10-30%; if the moisture content of the solid material is less than 10%, it is moistened to a moisture content of 10-30%.

[0049] In one or more embodiments, if the moisture content of the solid material is greater than 30%, it is dried to a moisture content of 10-30%. The drying method can adopt existing conventional methods, such as oven drying, freeze drying, fluidized bed drying and flash drying.

[0050] In one or more embodiments, if the moisture content of the solid material is less than 10%, it is moistened to a moisture content of 10-30%. The moistening method may adopt existing conventional methods, such as spray moistening, high-pressure micro-mist humidification, steam humidification, and ultrasonic humidification.

[0051] In one or more specific embodiments, a fluidized bed device is used to fluidize the pulverized material.

[0052] In one or more specific embodiments, the humid environment where the fluidized material is located refers to air humidity of 70-100%.

[0053] In one or more specific embodiments, the concentration of ozone in the gas introduced into the plasma treatment is greater than 1500 ppm, and the concentration of NOx is greater than 300 ppm.

[0054] In one or more specific embodiments, the ozone concentration may be 1500-2000 ppm, such as 1500-1600 ppm, 1600-1700 ppm, 1700-1800 ppm, 1800-1900 ppm, 1900-2000 ppm; the ozone concentration may also be 2000-4000 ppm, such as 3000-4000 ppm.

[0055] In one or more specific embodiments, the concentration of NOx can be 300-1000ppm, such as 300-400ppm, 400-500ppm, 500-600ppm, 600-700ppm, 700-800ppm, 800-900ppm, 900-1000ppm; the concentration of NOx can be 1000-2000ppm, such as 1000-1500ppm, 1500-2000ppm, etc.

[0056] In one or more specific embodiments, the method for degrading aflatoxin comprises the following steps:

[0057] (1) Grinding the solid material containing aflatoxin to 20-60 mesh, wherein the water content of the material is 10-30% of its mass;

[0058] (2) Load the crushed material into the fluidized bed and adjust the air pressure to 0.3-0.8 mbar to keep it in a fluidized state;

[0059] (3) Spray atomized water into the fluidized bed containing the crushed material to make the air humidity inside the fluidized bed 70-100%;

[0060] (4) Using a low-temperature plasma device, ozone and NOx gases are introduced into the fluidized bed in step (3); the concentration of the ozone is greater than 1500 ppm, and the concentration of the NOx is greater than 300 ppm.

[0061] The second aspect of the present invention aims to provide a device for degrading aflatoxin, comprising a fluidized bed and a plasma device; the fluidized bed is provided with a spray unit and a humidity control unit, the spray unit can spray atomized water into the fluidized bed, the humidity control unit is connected to the spray unit, and the water spraying amount of the spray unit can be controlled by the humidity control unit; the plasma device is connected to the fluidized bed, and ozone and NOx gas can be introduced into the fluidized bed.

[0062] The third aspect of the present invention aims to provide the use of the above-mentioned device in degrading aflatoxin contained in solid materials.

[0063] The fourth aspect of the present invention aims to provide a method for preparing feed for livestock and poultry, the method comprising:

[0064] 1) a step of treating solid materials using any of the methods of the present invention; and

[0065] 2) a step of preparing the feed using the solid material obtained in step 1);

[0066] In one or more embodiments, preferably, the step 2) comprises the step of directly mixing the material obtained in step 1) with other ingredients, or fermenting the material obtained in step 1) and then mixing it with other ingredients, or puffing the material obtained in step 1) and then mixing it with other ingredients to prepare the feed;

[0067] The ingredients in the preparation of the above feed can be any common ingredients in existing feed formulas, such as lactose, rice protein, vegetable oil, calcium hydrogen phosphate, stone powder, fish meal, various amino acids, various trace elements, various minerals, various vitamins, yeast nucleic acid, salt, citric acid, zinc oxide, organic iron, flavoring agent, choline and the like in any combination.

[0068] The peanut meal and corn meal treated by the method of the present invention can be used as a plant-derived protein feed and energy feed for the preparation of formula feed. The feed preparation method of the present invention can adopt existing conventional methods, such as cleaning, crushing, batching, mixing, post-processing (conditioning, puffing, granulation, drying, sieving), packaging, transportation and storage of the treated materials to prepare feed for laying hens or pig feed and other livestock and poultry.

[0069] The following specific implementation methods and examples are provided to illustrate the method for degrading aflatoxin of the present invention and are not intended to limit the scope of the present invention.

[0070] 1. Aflatoxin B1 (AFB1) content test method:

[0071] The experiment used the aflatoxin B1 fluorescence quantitative rapid detector produced by Nanjing Micro-Test Biotechnology Co., Ltd. The specific operation steps are as follows:

[0072] 1) Take 5±0.05 g of the solid material treated by the method of the present invention and put it into a 50 ml centrifuge tube;

[0073] 2) Add 25 ml of acetonitrile-water (840:160 v / v), vortex for 5 min, let stand for a few seconds, take 1 ml of the liquid into a 2 ml centrifuge tube, and centrifuge at 4000 rpm for 2 min;

[0074] 3) Add 750ul of sample diluent to the centrifuge tube, then add 50ul of centrifuge supernatant, mix well with a vortex oscillator for 3-5 seconds, take 100ul of the diluted liquid and add it to the sample well of the test card;

[0075] 4) Place the test card in a 37°C constant temperature incubator and cover it for 8 minutes; then insert the test card into the test port of the instrument, read and print the results.

[0076] The method for preparing acetonitrile water is to accurately measure 840 ml of anhydrous acetonitrile (AR grade), add 160 ml of pure water, mix well and seal for storage.

[0077] 2. Ozone and nitrogen oxide content detection method:

[0078] The concentrations of ozone and nitrogen oxides were measured by collecting the low-temperature plasma gas under each experimental condition in a sealed bag, using short-time detection tubes (ozone and nitrogen oxide tube numbers CH21001 and CH31001, respectively), with an accuracy of ±10 ~ 15% (Draegerwerk AG, Germany). Each test tube contains a colorimetric indicator that changes color when in contact with a specific gas. Precision gas detection pumps (Draeger safety AG&Co. KGaA, Germany), each pump is equivalent to 100 ml. High concentration ozone, less gas samples are collected in 5 to 20 ml syringes and connected to the detection tubes through flexible tubing.

[0079] 3. The devices used in the following embodiments:

[0080] like Figure 1 As shown, a device for degrading aflatoxin includes a fluidized bed (experimental-grade fluidized bed reactor (MIDIGLATT), from GLATT, Germany) and a low-temperature plasma device (article number TS-APJ01, from Shenzhen Eastcom High-Tech Automation Equipment Cable Co., Ltd.); a spray unit and a humidity control unit are provided in the fluidized bed, the spray unit can spray atomized water into the fluidized bed, the humidity control unit is connected to the spray unit, and the water spraying amount of the spray unit can be controlled by the humidity control unit; the plasma device is connected to the fluidized bed, and ozone and NOx gas can be introduced into the fluidized bed through the low-temperature plasma jet.

[0081] When the device is working, compressed air is introduced into the fluidized bed. The fluidized bed uses air to pass through the granular solid layer to put the material containing aflatoxin into a suspended state. When the air passes through the material, the active ingredients produced by the jet low-temperature plasma are brought in, allowing them to fully contact with the pollutants in the material, thereby ensuring the disinfection effect and efficiency.

[0082] 4. The preparation method of peanut meal in the following examples and comparative examples:

[0083] After cleaning and removing stones, peach pits and other hard blocks, the peanut kernel raw material is crushed into 6-8 petals by a crusher for uniform rolling in the next step. After being pressed into embryo sheets with a thickness of about 0.5-1.6 mm by an embryo press, it is transferred to a steaming and frying pan to complete the frying of embryos. The steaming and frying pan has 6 layers, divided into upper and lower layers, the upper three layers are steamed embryos, and the lower three layers are fried embryos. The moisture content of the embryos is 10-14% and 3-4.5% respectively. The fried embryos are pressed in an expeller to obtain pressed crude oil and by-product peanut cakes. The pressed crude oil goes to the downstream refining section, and the peanut cakes are sent to the leaching workshop, and extracted with 55°C edible grade n-hexane to obtain leached crude oil and peanut meal. Among them, the obtained peanut meal is dried in a 60°C oven to different moisture contents of 6-50%, that is, the peanut meal raw material used in the following examples and comparative examples.

[0084] 5. The preparation method of corn meal in the following examples and comparative examples:

[0085] The preparation process of corn meal raw materials is divided into two stages, namely the germ extraction stage and the leaching stage. 1. The corn raw materials are cleaned to remove stones, branches and other hard objects, and then moistened with direct steam to separate the skin, germ and endosperm. The total residence time of this step is 12 minutes, and the water content is 3-6%; after moistening, it goes to the crusher for impact or rolling, breaking the endosperm into 4-6 petals, and then screened and separated by suction to separate the small residue and corn husk, and then separated by gravity classifier The germ and endosperm are sent to the embryo rolling machine for rolling, the germ is flattened, and the endosperm is crushed, and finally the flaky germ is screened through a flat screen, which is the embryo material used in the leaching stage. 2. The embryo material is cleaned to remove starch and other grains, so that the grain content in the germ is less than 3%, and then the cleaned embryo material is softened, with a moisture content of 12%, a temperature of 65°C, and softening for 15-20 min; the softened embryo material is sent to the embryo rolling machine to be pressed into embryos with a thickness of 0.3-0.4 mm; finally, the embryo pieces are tempered to control the moisture content to 7-8%, and then sent to the leaching workshop, and extracted with No. 6 solvent oil at 50-55°C to obtain leached crude oil and corn meal. Among them, the corn meal is dried in a 60°C oven to different moisture contents of 6-50%, that is, the corn meal raw material used in the following examples and comparative examples.

[0086] Embodiment 1:

[0087] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0088] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0089] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1810 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 405 ppm.

[0090] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0091] Embodiment 2:

[0092] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0093] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 70%. The humidity is controlled by the humidity control unit;

[0094] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1870 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 392 ppm.

[0095] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0096] Embodiment 3:

[0097] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0098] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 100%. The humidity is controlled by the humidity control unit;

[0099] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1577 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 310 ppm.

[0100] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0101] Embodiment 4:

[0102] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.3 mbar.

[0103] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0104] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1780 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 359 ppm.

[0105] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0106] Embodiment 5:

[0107] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.8 mbar.

[0108] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0109] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1560 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 305 ppm.

[0110] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0111] Embodiment 6:

[0112] (1) 1 kg of 40-mesh peanut meal (moisture content of 6%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0113] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0114] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1790 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 458 ppm.

[0115] (4) After stabilization, the peanut meal is processed for 20 min to obtain the processed peanut meal.

[0116] Embodiment 7:

[0117] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0118] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0119] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 3880 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 1450 ppm.

[0120] (4) After stabilization, the peanut meal is processed for 60 min to obtain the processed peanut meal.

[0121] Embodiment 8:

[0122] (1) 1 kg of 40-mesh peanut meal (moisture content of 6%) was evenly sprayed with atomized water to make the moisture content of the meal 10%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0123] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0124] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1796 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 475 ppm.

[0125] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0126] Embodiment 9:

[0127] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 30%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0128] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0129] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1599 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 350 ppm.

[0130] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0131] Embodiment 10:

[0132] (1) 1 kg of 40-mesh corn meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the corn meal in a fluidized state with an air pressure of 0.5 mbar.

[0133] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0134] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1835 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 455 ppm.

[0135] (4) After stabilization, the corn meal is processed for 30 min to obtain the processed corn meal.

[0136] Embodiment 11:

[0137] (1) 500 g of 40-mesh corn meal (8% moisture content) and 500 g of 40-mesh peanut meal (8% moisture content) were mixed and evenly sprayed with atomized water to make the moisture content of the meal 20%. Then, the mixture was loaded into a 10 L fluidized bed and air was introduced to make the mixture in a fluidized state with an air pressure of 0.5 mbar.

[0138] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0139] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1801 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 401 ppm.

[0140] (4) After stabilization, the mixture is treated for 30 min to obtain a mixture of treated corn meal and peanut meal.

[0141] Embodiment 12:

[0142] (1) 1 kg of 20-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0143] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0144] (3) When the low-temperature plasma equipment was turned on, the ozone concentration was 1789 ppm and the NOx component (N2O4, NO2, NO5, NO3) concentration was 411 ppm.

[0145] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0146] Embodiment 13:

[0147] (1) 1 kg of 60-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0148] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0149] (3) When the low-temperature plasma equipment is turned on, the ozone concentration is 1877 ppm and the NOx component (N2O4, NO2, NO5, NO3) concentration is 424 ppm.

[0150] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0151] Embodiment 14:

[0152] (1) Take 1 kg of 40-mesh peanut meal with a moisture content of 50%. Dry it in a 60°C oven until the moisture content is 30%. Then load it into a 10 L fluidized bed and introduce air to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0153] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0154] (3) When the low-temperature plasma equipment is turned on, the ozone concentration is 1879 ppm and the NOx component (N2O4, NO2, NO5, NO3) concentration is 452 ppm.

[0155] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0156] Embodiment 15:

[0157] (1) Take 1 kg of 60-mesh peanut meal with a moisture content of 20% and directly load it into a 10-L fluidized bed. Let air flow in to fluidize the peanut meal at a pressure of 0.5 mbar.

[0158] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0159] (3) When the low-temperature plasma equipment is turned on, the ozone concentration is 1862 ppm and the NOx component (N2O4, NO2, NO5, NO3) concentration is 414 ppm.

[0160] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0161] Comparative Example 1:

[0162] (1) 1 kg of 40-mesh peanut meal (moisture content 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed without air;

[0163] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0164] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 3740 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 1500 ppm.

[0165] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0166] Comparative Example 2:

[0167] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced at a pressure of 0.28 mbar and the bed was static.

[0168] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0169] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1892ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 460ppm.

[0170] (4) After stabilization, the peanut meal is processed for 30 minutes to obtain the processed peanut meal.

[0171] Comparative Example 3:

[0172] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed and introduced with air at a pressure of 0.85 mbar;

[0173] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0174] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1520 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 372 ppm.

[0175] (4) After stabilization, the peanut meal is processed for 30 minutes to obtain the processed peanut meal.

[0176] Comparative Example 4:

[0177] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0178] (2) Spray atomized water into the system from the spray unit to humidify the air and ensure that the humidity inside the fluidized bed is 45%. The humidity is controlled by the humidity control unit;

[0179] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 2110 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 560 ppm.

[0180] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0181] Comparative Example 5:

[0182] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Dry air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0183] (2) Humidity is controlled by the humidity control unit, and the internal humidity is 5%;

[0184] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 2650 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 602 ppm.

[0185] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0186] Comparative Example 6:

[0187] (1) 1 kg of 40-mesh peanut meal (moisture content of 6%) was evenly sprayed with atomized water to make the moisture content of the meal 9%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0188] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0189] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 2450 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 458 ppm.

[0190] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0191] Comparative Example 7:

[0192] (1) Take 1 kg of 40-mesh peanut meal (water content of 6%) and load it into a 10-L fluidized bed. Let air flow in to fluidize the peanut meal at a pressure of 0.5 mbar.

[0193] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0194] (3) Turn on the low-temperature plasma equipment. The ozone concentration is 1680 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 320 ppm.

[0195] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0196] Comparative Example 8:

[0197] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0198] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0199] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1699 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 470 ppm.

[0200] (4) After stabilization, the peanut meal is processed for 10 min to obtain the processed peanut meal.

[0201] Comparative Example 9:

[0202] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0203] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0204] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1480 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 298 ppm.

[0205] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0206] Comparative Example 10:

[0207] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to a moisture content of 35%, and then loaded into a 10-L fluidized bed and introduced with air at a pressure of 0.5 mbar.

[0208] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0209] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1588 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 360 ppm.

[0210] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0211] Comparative Example 11:

[0212] (1) 1 kg of uncrushed peanut meal (water content 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, loaded into a 10 L fluidized bed, and air was introduced at a pressure of 0.5 mbar;

[0213] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0214] (3) Turn on the low-temperature plasma equipment. The ozone concentration is 1699 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 330 ppm.

[0215] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0216] Comparative Example 12:

[0217] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0218] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0219] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1499 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 332 ppm.

[0220] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0221] Comparative Example 13:

[0222] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0223] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0224] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1525 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 298 ppm.

[0225] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0226] Comparative Example 14:

[0227] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0228] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0229] (3) When the low-temperature plasma equipment is turned on, the ozone concentration is 1799 ppm and the NOx component (N2O4, NO2, NO5, NO3) concentration is 441 ppm.

[0230] (4) After stabilization, the peanut meal is processed for 62 min to obtain the processed peanut meal.

[0231] Comparative Example 15:

[0232] (1) 1 kg of 10-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0233] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0234] (3) When the low-temperature plasma equipment is turned on, the ozone concentration is 1896 ppm and the NOx component (N2O4, NO2, NO5, NO3) concentration is 461 ppm.

[0235] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0236] Comparative Example 16:

[0237] (1) 1 kg of 80-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0238] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0239] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1990 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 473 ppm.

[0240] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0241] Comparative Example 17:

[0242] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0243] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0244] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 1782 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 0 ppm.

[0245] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0246] Comparative Example 18:

[0247] (1) 1 kg of 40-mesh peanut meal (moisture content of 8%) was evenly sprayed with atomized water to make the moisture content of the meal 20%, and then loaded into a 10-L fluidized bed. Air was introduced to make the peanut meal in a fluidized state with an air pressure of 0.5 mbar.

[0248] (2) Spray atomized water into the system from the spray unit to humidify the air to ensure that the humidity inside the fluidized bed is 85%. The humidity is controlled by the humidity control unit;

[0249] (3) Turn on the low-temperature plasma equipment, the ozone concentration is 0 ppm, and the NOx component (N2O4, NO2, NO5, NO3) concentration is 397 ppm.

[0250] (4) After stabilization, the peanut meal is processed for 30 min to obtain the processed peanut meal.

[0251]

[0252] ;

[0253] It can be seen from the above embodiments and comparative examples that the present invention combines a fluidized bed to allow the active ingredients of low-temperature plasma to fully contact with pollutants such as aflatoxin, and has an obvious disinfection effect and is simple to operate.

[0254] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A method for degrading aflatoxin, comprising the steps of crushing a solid material containing aflatoxin to make it in a fluidized state, and subjecting the fluidized material to a plasma treatment in an environment with a humidity of at least 70%; the gas introduced into the plasma treatment is ozone and NO x ;in, The solid material containing aflatoxin is crushed into 20-60 meshes, and the water content of the solid material is controlled to 10-30%; Load the crushed material into the fluidized bed and adjust the wind pressure to 0.3-0.8mbar to make it in a fluidized state; In the gas introduced into the plasma treatment, the concentration of ozone is greater than 1500ppm, and the concentration of NOx is greater than 300ppm; the introduction time of the gas is 20-60min.

2. The method according to claim 1, characterized in that The solid material is one or more of agricultural products, feed raw materials, processed agricultural products or feed.

3. The method according to claim 2, characterized in that The agricultural products are peanuts, corn, sorghum, rice, millet, wheat, soybeans or nuts.

4. The method according to claim 2, characterized in that The feed raw material is bran, soybean meal, corn germ meal, cotton meal, peanut meal or rapeseed meal.

5. The method according to claim 1, characterized in that If the moisture content of the solid material is greater than 30%, it is dried to a moisture content of 10-30%; if the moisture content of the solid material is less than 10%, it is moistened to a moisture content of 10-30%.

6. The method according to claim 1, characterized in that The fluidized bed equipment is used to make the crushed materials in a fluidized state.

7. The method according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) Grinding the solid material containing aflatoxin into 20-60 meshes and making the water content of the material 10-30% of its mass; (2) Load the crushed material into the fluidized bed and adjust the air pressure to 0.3-0.8 mbar to keep it in a fluidized state; (3) Spray atomized water into the fluidized bed containing the crushed material to make the air humidity inside the fluidized bed 70-100%; (4) Using a low-temperature plasma device to introduce ozone and NO into the fluidized bed in step (3) x gas; the concentration of ozone is greater than 1500ppm, the NO x The concentration is greater than 300ppm; the gas is introduced for 20-60min.

8. A method for preparing feed for livestock and poultry, characterized in that: The method comprises: 1) a step of treating solid materials using the method according to any one of claims 1 to 7; and 2) A step of preparing the feed using the solid material obtained in step 1).

9. The method according to claim 8, characterized in that The step 2) comprises the steps of directly mixing the solid material obtained in step 1) with other ingredients, or fermenting the solid material obtained in step 1) and then mixing it with other ingredients, or puffing the solid material obtained in step 1) and then mixing it with other ingredients to prepare the feed.

Images