Detoxification apparatus and detoxification method for aflatoxins in granular agricultural products

Abstract

The present application relates to the technical field of agricultural product safety, and provides a detoxification device and method for aflatoxin in granular agricultural products, the detoxification device comprising a gas-liquid mixing device, an ozone generator, a micro-nano bubble releaser and a reaction tank; the water inlet and the water outlet of the gas-liquid mixing device are communicated with the reaction tank through water inlet pipeline and water outlet pipeline respectively, and the ozone outlet of the ozone generator is communicated with the reaction tank through an ozone pipeline; the ozone aerator and the micro-nano bubble releaser arranged in the reaction tank are connected with the ozone pipeline and the water outlet pipeline respectively; the water in the reaction tank flows through the gas-liquid mixing device and mixes with the preset gas through the water inlet pipeline, and then flows to the micro-nano bubble releaser through the water outlet pipeline, and the micro-nano bubbles are released through the micro-nano bubble releaser; the ozone generated by the ozone generator is released into the reaction tank through the ozone pipeline and the ozone aerator, and the ozone and the micro-nano bubbles are mixed in the water to remove the aflatoxin in the granular agricultural products.

Description

Technical Field

[0001] This invention relates to the field of agricultural product safety technology, and in particular to a detoxification device and method for aflatoxin in granular agricultural products. Background Technology

[0002] Agricultural products are essential to our daily lives, and their safety is directly related to human health. Affected by various factors, agricultural products are easily contaminated by fungal toxins during planting, harvesting, storage, transportation, and processing, with aflatoxin contamination being the most common problem. Aflatoxin (AFT) is a secondary metabolite produced by molds or parasitic Aspergillus and is currently the most toxic of all fungal toxins. More than 20 aflatoxins and their derivatives have been isolated, including aflatoxin B1 (AFB1) and aflatoxin B2 (AFB2). Aflatoxin B1 is the most toxic, being 10 times more toxic than potassium cyanide and 68 times more toxic than arsenic.

[0003] Currently, the technologies used for detoxification of agricultural and sideline products are mainly divided into physical, chemical, and biological methods. All three methods have a certain detoxification effect on aflatoxin. Compared with chemical and biological methods, physical methods have advantages such as simple operation, low cost, good repeatability, and high scalability, and are more widely used in practice. Due to the unique characteristics of solid granular agricultural and sideline products, physical adsorption methods cannot be used for detoxification. Therefore, removing aflatoxin from solid granular agricultural and sideline products without altering their original properties is one of the major challenges currently facing the entire agricultural and food industries.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a simple, rapid, low-energy-consumption, and industrially applicable device and method for detoxifying aflatoxin from granular agricultural products.

[0006] This invention provides a device for detoxifying aflatoxin from granular agricultural products, comprising a gas-liquid mixing device, an ozone generator, a micro-nano bubble releaser, and a reaction tank;

[0007] The inlet of the gas-liquid mixing device is connected to the reaction tank through an inlet pipe, the outlet of the gas-liquid mixing device is connected to the reaction tank through an outlet pipe, and the ozone outlet of the ozone generator is connected to the reaction tank through an ozone pipe.

[0008] An ozone aerator and a micro-nano bubble releaser are installed near the bottom of the reaction tank. One end of the ozone pipeline is connected to the ozone aerator, and the other end of the water outlet pipeline is connected to the micro-nano bubble releaser.

[0009] In this process, water in the reaction tank flows through the inlet pipe to the gas-liquid mixing device and mixes with a preset gas. Then, it flows through the outlet pipe to the micro-nano bubble releaser and releases micro-nano bubbles through the micro-nano bubble releaser. Ozone generated by the ozone generator is released into the reaction tank containing the micro-nano bubbles through the ozone pipe and the ozone aeration head.

[0010] According to the present invention, the device for detoxifying aflatoxin in granular agricultural products includes a gas-liquid mixing device comprising a gas-liquid mixing pump and a water tank. The inlet of the gas-liquid mixing pump is connected to the reaction tank through the inlet pipe, the outlet of the gas-liquid mixing pump is connected to the inlet of the water tank, the air inlet of the gas-liquid mixing pump is connected to a gas source, and the outlet of the water tank is connected to the reaction tank through the outlet pipe.

[0011] According to the detoxification device for aflatoxin in granular agricultural products provided by the present invention, the water inlet end of the water inlet pipe, the micro-nano bubble releaser, and the ozone aerator are all immersed in the water in the reaction tank.

[0012] According to the detoxification device for aflatoxin in granular agricultural products provided by the present invention, the air inlet of the gas-liquid mixing pump is vented with air or ozone, and the flow rate of the vented air or ozone is greater than 0 and less than or equal to 1.5 L / min.

[0013] According to the detoxification device for aflatoxin in granular agricultural products provided by the present invention, the inlet water pipe is provided with an inlet regulating valve and a vacuum gauge, and the outlet water pipe is provided with an outlet regulating valve and a pressure gauge.

[0014] According to the detoxification device for aflatoxin in granular agricultural products provided by the present invention, the ozone generator is further provided with an air inlet, an air outlet, and an ozone inlet. An air flow meter is provided on the pipeline between the air outlet and the ozone inlet. Air enters the ozone generator through the air inlet, is compressed, flows through the air outlet to the air flow meter, and after the flow rate is adjusted by the air flow meter, it enters the ozone generated by the ozone generator through the ozone inlet.

[0015] According to the detoxification device for aflatoxin in granular agricultural products provided by the present invention, the ozone aerator has a particle size of 1μm-10μm.

[0016] The present invention also provides a method for detoxifying aflatoxin from granular agricultural products, using the detoxification device described above, and the detoxification method includes the following steps:

[0017] Step 1: Inject a predetermined volume of water into the reaction tank;

[0018] Step 2: Turn on the gas-liquid mixing device. Water in the reaction tank flows into the gas-liquid mixing device through the water inlet pipe, mixes with the preset gas, and then flows through the water outlet pipe to the micro-nano bubble releaser, and releases micro-nano bubbles into the water through the micro-nano bubble releaser.

[0019] Step 3: Turn on the ozone generator. The ozone generated by the ozone generator flows through the ozone pipeline to the ozone aeration head, and is released into the water of the reaction tank through the ozone aeration head and mixed with the micro-nano bubbles to obtain an ozone micro-nano bubble mixture.

[0020] Step four: Add granular agricultural products containing aflatoxin to the ozone micro-nano bubble mixture, whereby the aflatoxin in the granular agricultural products is removed by the ozone micro-nano bubble mixture.

[0021] According to the method for detoxifying aflatoxin from granular agricultural products provided by the present invention, the step of adding granular agricultural products containing aflatoxin to the ozone micro-nano bubble mixture includes:

[0022] The granular agricultural products containing aflatoxin are placed in 100-300 mesh gauze or woven bags, and then the granular agricultural products packaged in the gauze or woven bags are placed in the ozone micro-nano bubble mixture.

[0023] According to the method for detoxifying aflatoxin from granular agricultural products provided by the present invention, in step one, the volume of water injected into the reaction tank is greater than 4L.

[0024] The above-described technical solution of the present invention has the following beneficial effects:

[0025] This invention provides a device and method for detoxifying aflatoxin from granular agricultural products. The device combines a gas-liquid mixing unit, an ozone generator, a micro-nano bubble emitter, and a reaction tank. It employs a mixture of ozone and micro-nano bubble water to detoxify aflatoxin from solid granular agricultural products, removing or degrading the toxins on the surface of the products without affecting their inherent properties. Because micro-nano bubbles have a large specific surface area, high mass transfer efficiency, and readily generate free radicals, mixing micro-nano bubble water with ozone can improve the ozone mass transfer coefficient and solubility, promoting the generation of hydroxyl radicals from the micro-nano bubbles. This significantly enhances the ozone oxidation effect, thereby strengthening the detoxification process. Furthermore, the entire detoxification system is a circulating ozone micro-nano bubble water treatment system. After aflatoxin in solid granular agricultural products is degraded, the liquid used in the reaction tank is circulated and released through a gas-liquid mixing device, and then micro-nano bubbles are released again through a micro-nano bubble releaser. This achieves resource recycling, extends the contact time between ozone and micro-nano bubbles, further improves detoxification efficiency, achieves ideal detoxification results, and ensures the safety of agricultural products for consumption. Therefore, the detoxification device and method for aflatoxin in granular agricultural products provided by this invention have advantages such as simple operation, fast detoxification speed, low energy consumption, and industrial applicability. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a detoxification device for aflatoxin in granular agricultural products provided in an embodiment of the present invention;

[0028] Figure 2 This is a flowchart of a method for detoxifying aflatoxin in granular agricultural products provided in an embodiment of the present invention;

[0029] Figure 3 The graph shows experimental data on the detoxification of peanut meal under different pressure values ​​provided in Embodiment 1 of the present invention.

[0030] Figure 4 This is a graph showing experimental data on the detoxification of peanut meal with different particle sizes provided in Embodiment 2 of the present invention;

[0031] Figure 5 This is a graph showing experimental data on the detoxification of peanut meal at different treatment times, provided in Embodiment 3 of the present invention.

[0032] Figure label:

[0033] 1. Reaction tank; 2. Inlet regulating valve; 3. Vacuum gauge; 4. Inlet; 5. Gas-liquid mixing pump; 6. Preset gas inlet; 7. Water tank; 8. Outlet; 9. Pressure gauge; 10. Outlet regulating valve; 11. Micro-nano bubble releaser; 12. Ozone aerator head; 13. Ozone outlet; 14. Ozone generator; 15. Ozone inlet; 16. Air flow meter; 17. Air outlet; 18. Air inlet; 19. Inlet water pipe; 20. Outlet water pipe; 21. Ozone pipe; 22. Gas-liquid mixing device. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] Please see Figure 1 The present invention provides a detoxification device for aflatoxin in granular agricultural products. The detoxification device includes a gas-liquid mixing device 22, an ozone generator 14, a micro-nano bubble releaser 11, and a reaction tank 1.

[0036] The reaction tank 1 contains water and granular agricultural products containing aflatoxin. The gas-liquid mixing device 22 draws in water and a preset gas from the reaction tank 1 and mixes the gas and water. The ozone generator 14 generates ozone, and the micro-nano bubble releaser 11 releases micro-nano bubbles.

[0037] Specifically, the gas-liquid mixing device 22 is provided with an inlet 4 and an outlet 8. The inlet 4 of the gas-liquid mixing device 22 is connected to the reaction tank 1 through an inlet pipe 19, and the outlet 8 of the gas-liquid mixing device 22 is connected to the reaction tank 1 through an outlet pipe 20.

[0038] In one embodiment, the gas-liquid mixing device 22 includes a gas-liquid mixing pump 5 and a water tank 7. The gas-liquid mixing pump 5 has an inlet 4 and an outlet, and the water tank 7 has an inlet and an outlet 8. The inlet 4 of the gas-liquid mixing pump 5 is connected to the reaction tank 1 via an inlet pipe 19, the outlet of the gas-liquid mixing pump 5 is connected to the inlet of the water tank 7, and the outlet 8 of the water tank 7 is connected to the reaction tank 1 via an outlet pipe 20. The gas-liquid mixing pump 5 also includes a preset gas inlet 6, which is connected to a gas source.

[0039] Ozone generator 14 is an air-source ozone generator, which is equipped with an air inlet 18, an air outlet 17, an ozone inlet 15, and an ozone outlet 13. An air flow meter 16 is installed on the pipeline between the air outlet 17 and the ozone inlet 15. Air enters the compressor of ozone generator 14 through the air inlet 18, is compressed, and then flows through the air outlet 17 to the air flow meter 16. After the flow rate is regulated by the air flow meter 16, the air enters the ozone generator 14 through the ozone inlet 15 to generate ozone. The ozone outlet 13 is connected to the reaction tank 1 through the ozone pipeline 21.

[0040] An ozone aerator 12 and a micro-nano bubble emitter 11 are located near the bottom of the reaction tank 1. One end of the ozone pipeline 21 is connected to the ozone aerator 12, and the other end of the water outlet pipeline 20 is connected to the micro-nano bubble emitter 11.

[0041] In this process, water in reaction tank 1 flows through inlet pipe 19 and gas-liquid mixing device 22 to mix with preset gas, and then flows through outlet pipe 20 to micro-nano bubble releaser 11, where micro-nano bubbles are released. Ozone generated by ozone generator 14 is released through ozone pipe 21 and ozone aeration head 12 into the reaction tank containing micro-nano bubbles. After the micro-nano bubbles and ozone are mixed in the water, an ozone micro-nano bubble mixture is formed.

[0042] Furthermore, the water inlet pipe 19, the micro-nano bubble releaser 11, and the ozone aerator 12 are all installed in the reaction tank 1, and the water inlet end of the water inlet pipe 19, the micro-nano bubble releaser 11, and the ozone aerator 12 are all immersed in the water in the reaction tank 1, so as to ensure that the water in the reaction tank 1 can enter the gas-liquid mixing device 22 through the water inlet pipe 19, and that micro-nano bubbles and ozone can be released into the water for mixing.

[0043] In one embodiment, the water outlet pipe 20, the water inlet pipe 19, and the ozone pipe 21 are all installed on the reaction tank 1 in a non-fixed manner, and their positions can be moved according to actual use.

[0044] In one embodiment, the inner diameter of both the outlet pipe 20 and the inlet pipe 19 is 20 mm, and the inner diameter of the ozone pipe 21 is 6 mm-8 mm.

[0045] In one embodiment, the micro-nano bubble emitter 11 and the ozone aerator 12 are detachably installed on the water outlet pipe 20 and the ozone pipe 21, respectively, for replacement.

[0046] In one embodiment, the inlet pipe 19 is equipped with an inlet regulating valve 2 and a vacuum gauge 3, and the outlet pipe 20 is equipped with an outlet regulating valve 10 and a pressure gauge 9. By adjusting the inlet regulating valve 2 and the outlet regulating valve 10, the reading of the pressure gauge 9 is controlled, thereby controlling the size and number of micro-nano bubbles generated by the micro-nano bubble releaser 11.

[0047] The vacuum gauge 3 operates within a range of -0.03 MPa to -0.1 MPa; the pressure gauge 9 operates within a range of 0.2 MPa to 0.4 MPa. Preferably, the operating parameter of the pressure gauge 9 can be set at 0.34 MPa.

[0048] Furthermore, the preset gas inlet 6 of the gas-liquid mixing pump 5 can be used to introduce air or ozone, and the flow rate of the introduced air or ozone is greater than 0 and less than or equal to 1.5 L / min. Preferably, the flow rate of the introduced air or ozone is controlled at 0.75 L / min.

[0049] In this embodiment, the particle size of the ozone aerator 12 is 1μm-10μm. Preferably, the particle size of the ozone aerator 12 is 5μm.

[0050] This detoxification device uses micro-nano aeration stones for ozone aeration. By adjusting the ozone flow rate, ozone diffuses through the micro-nano-sized pores of the ozone aeration head 12 in the form of micro-nano bubbles into the liquid (water), which is also at the micro-nano level. This reduces ozone mass transfer resistance, improves ozone mass transfer efficiency, and significantly reduces energy consumption. Simultaneously, the gas-liquid interface generates some hydroxyl radicals, further enhancing the ozone oxidation effect.

[0051] In this embodiment, reaction tank 1 is a covered glass vessel of about 10L in size, or it can be replaced with a plastic container. In order for the detoxification device to work properly, the water or liquid in the reaction tank should not be less than 4L. However, if it is a smaller gas-liquid mixing pump and water tank, the amount of water to be added can be considered separately.

[0052] In one embodiment, a water purifier is installed on the water inlet pipe 19 to prevent particulate agricultural products from flowing into the gas-liquid mixing device 22 and the micro-nano bubble releaser 11 and causing blockage.

[0053] Ozone technology offers effective detoxification without generating secondary pollution. However, numerous studies have shown that ozone technology also has certain limitations, such as a relatively long detoxification time for solid particulate products and a relatively low ozone oxidation rate and efficiency.

[0054] Based on this, the present invention provides a detoxification device for aflatoxin in granular agricultural products, which combines a gas-liquid mixing device, an ozone generator, a micro-nano bubble releaser, and a reaction tank. It employs a mixture of ozone and micro-nano bubble water to detoxify aflatoxin from solid granular agricultural products. The aflatoxin in the solid granular agricultural products is absorbed and degraded by micro-nano bubble water or ozone-micro-nano bubble water, or directly degraded, removing aflatoxin from the surface of the solid granular agricultural products. During this process, the inherent characteristics of the solid granular agricultural products remain unaffected. This detoxification device fully utilizes the combined effects of the high adsorption capacity and high mass transfer efficiency of micro-nano bubbles (due to their large specific surface area), the high energy during bubble bursting, and the strong oxidizing power of ozone, significantly improving the detoxification efficiency of aflatoxin in solid granular agricultural products, shortening the detoxification time, and maintaining the inherent characteristics of the solid granular agricultural products.

[0055] In addition, the entire detoxification device of the present invention is a circulating ozone micro-nano bubble water treatment system. That is, after aflatoxin in solid particulate agricultural products is degraded, the liquid used in the reaction tank is circulated and released through a gas-liquid mixing device, and then micro-nano bubbles are circulated and released through a micro-nano bubble releaser, thereby realizing the recycling of resources. This can prolong the action time of ozone and micro-nano bubbles, further improve the detoxification efficiency, and ensure the food safety of agricultural products.

[0056] Please see Figure 2 This invention also provides a method for detoxifying aflatoxin from granular agricultural products. This detoxification method uses the detoxification device described above and includes the following steps:

[0057] Step 1: Inject a predetermined volume of water into the reaction tank.

[0058] The water injected into the reaction tank can be tap water or purified water. Furthermore, to ensure the detoxification device functions properly, the water or liquid in the reaction tank should be at least 4L; however, for smaller gas-liquid mixing pumps and water tanks, the water volume can be adjusted accordingly.

[0059] Step 2: Turn on the gas-liquid mixing device. Water in the reaction tank flows into the gas-liquid mixing device through the water inlet pipe, mixes with the preset gas, and then flows through the water outlet pipe to the micro-nano bubble releaser, which releases micro-nano bubbles into the water.

[0060] Specifically, the gas-liquid mixing device includes a gas-liquid mixing pump and a water tank. After the power is turned on, the water in the reaction tank is drawn into the gas-liquid mixing pump. By adjusting the flow rate of the preset gas inlet, the preset gas and water are vortex-mixed in the gas-liquid mixing pump and then flow through the water tank along the water outlet pipe to the micro-nano bubble releaser. The micro-nano bubble releaser releases micro-nano bubbles into the water in the reaction tank, so that micro-nano bubble water is formed in the reaction tank.

[0061] The preset gas can be air or ozone.

[0062] Step 3: Turn on the ozone generator. The ozone generated by the ozone generator flows through the ozone pipeline to the ozone aerator head, and is released into the water of the reaction tank through the ozone aerator head to mix with micro-nano bubbles to obtain ozone micro-nano bubble mixture.

[0063] Step 4: Place granular agricultural products containing aflatoxin into the ozone micro-nano bubble mixture. The aflatoxin in the granular agricultural products is removed by the ozone micro-nano bubble mixture.

[0064] In one embodiment, step four, which involves adding granular agricultural products containing aflatoxin to the ozone micro-nano bubble mixture, includes:

[0065] The granular agricultural products containing aflatoxin are placed in 100-300 mesh gauze or woven bags, and then the gauze or woven bag-packaged granular agricultural products are placed in ozone micro-nano bubble mixture, thereby preventing the granular or fine powder agricultural products from entering the micro-nano bubble releaser and causing blockage.

[0066] Alternatively, granular agricultural products containing aflatoxin can be directly placed into the ozone micro-nano bubble mixture. Simply install a water purifier on the inlet pipe to prevent granular or fine powdery agricultural products from entering the micro-nano bubble emitter and causing blockage.

[0067] The following detailed description of the method for detoxifying aflatoxin in granular agricultural products provided by the present invention is illustrated through specific embodiments.

[0068] Example 1

[0069] This embodiment describes a method for detoxifying aflatoxin from solid granular agricultural products under different pressure conditions, including the following steps:

[0070] Step 1: Pour 8L of tap water into the reaction tank;

[0071] The second step is to turn on the power supply of the gas-liquid mixing pump in the gas-liquid mixing device and draw the water in the reaction tank into the gas-liquid mixing pump.

[0072] The third step is to adjust the air flow rate in the preset gas inlet of the gas-liquid mixing pump to control the air flow rate at 0.75L / min. After the air and water are vortex-mixed in the gas-liquid mixing pump, they flow through the water tank and along the water outlet pipe to the micro-nano bubble releaser.

[0073] Step 4: Adjust the inlet or outlet regulating valve to keep the pressure gauge reading between 0.2 MPa and 0.4 MPa;

[0074] Step 5: Turn on the ozone generator power, turn on the gas source switch and adjust the air inlet flow rate to 5L / min. After 2-3 minutes, turn on the ozone switch. The generated ozone is released into the reaction tank through the ozone aeration head along the ozone pipeline and mixes with the generated micro-nano bubbles to obtain an ozone micro-nano bubble mixture.

[0075] Step 6: Add 30g of peanut meal wrapped in 200-mesh nylon gauze to the ozone micro-nano bubble mixture. After 30 minutes, turn off the power to the ozone generator and the gas-liquid mixing pump.

[0076] The seventh step is to test and calculate the toxins in the processed peanut meal.

[0077] Regarding the above experimental steps, adjustable parameters also include the amount of ozone in the reaction tank, the size of peanut meal particles, the treatment time, and the feed-to-liquid ratio.

[0078] Experimental results are as follows Figure 3 As shown, taking the data of two toxins, AFB1 and AFB2, as an example, the results show that within a certain range, the higher the outlet pressure of the gas-liquid mixing device, the higher the AFT removal rate gradually increases. When the pressure is 0.34 MPa, the AFT removal rate begins to level off, especially for AFB1. From the perspective of energy saving and safety, 0.34 MPa is ultimately selected as the optimal pressure.

[0079] Example 2

[0080] This embodiment describes a method for detoxifying aflatoxin from solid granular agricultural products under conditions of different peanut meal particle sizes, including the following steps:

[0081] Step 1: Pour 8L of tap water into the reaction tank;

[0082] The second step is to turn on the power supply of the gas-liquid mixing pump in the gas-liquid mixing device and draw the water in the reaction tank into the gas-liquid mixing pump.

[0083] The third step is to adjust the air flow rate in the preset gas inlet of the gas-liquid mixing pump to control the air flow rate at 0.75L / min. After the air and water are vortex-mixed in the gas-liquid mixing pump, they flow through the water tank and along the water outlet pipe to the micro-nano bubble releaser.

[0084] Step 4: Adjust the inlet or outlet regulating valve to keep the pressure gauge reading at 0.34 MPa;

[0085] Step 5: Turn on the ozone generator power, turn on the gas source switch and adjust the air inlet flow rate to 5L / min. After 2-3 minutes, turn on the ozone switch. The generated ozone is released into the reaction tank through the ozone aeration head along the ozone pipeline and mixed with micro-nano bubbles to obtain ozone micro-nano bubble mixture.

[0086] Step 6: Add 30g of peanut meal of different particle sizes wrapped in 200-mesh nylon gauze to the ozone micro-nano bubble mixture. After processing for 30 minutes, turn off the power to the ozone generator and the gas-liquid mixing pump.

[0087] The seventh step is to test and calculate the toxins in the processed peanut meal.

[0088] Experimental results are as follows Figure 4 As shown, the results indicate that smaller peanut meal particle size leads to a slight but insignificant increase in AFT removal rate. Therefore, we hypothesize that within a certain range, variations in the particle size of powdered peanut meal have almost no effect on the AFT removal rate.

[0089] Example 3

[0090] This embodiment describes a method for detoxifying aflatoxin from solid granular agricultural products at different processing times, including the following steps:

[0091] Step 1: Pour 8L of tap water into the reaction tank;

[0092] The second step is to turn on the power supply of the gas-liquid mixing pump in the gas-liquid mixing device and draw the water in the reaction tank into the gas-liquid mixing pump.

[0093] The third step is to adjust the air flow rate in the preset gas inlet of the gas-liquid mixing pump to control the air flow rate at 0.75L / min. After the air and water are vortex-mixed in the gas-liquid mixing pump, they flow through the water tank and along the water outlet pipe to the micro-nano bubble releaser.

[0094] Step 4: Adjust the inlet or outlet regulating valve to keep the pressure gauge reading at 0.34 MPa;

[0095] Step 5: Turn on the ozone generator power, turn on the gas source switch and adjust the air inlet flow rate to 5L / min. After 2-3 minutes, turn on the ozone switch. The generated ozone is released into the reaction tank through the ozone aeration head along the ozone pipeline and mixed with micro-nano bubbles to obtain ozone micro-nano bubble mixture.

[0096] Step 6: Add 30g of peanut meal wrapped in 200-mesh nylon gauze and passed through a 10-mesh sieve to the ozone micro-nano bubble mixture. After a certain period of time, turn off the power to the ozone generator and the gas-liquid mixing pump.

[0097] The seventh step is to test and calculate the toxins in the processed peanut meal.

[0098] Experimental results are as follows Figure 5 As shown, the results indicate that the AFT removal rate increases with time over a certain period of time, reaching a maximum of over 75%. Calculations show that the aflatoxin content in peanut meal can be lower than the limit standard after 120 minutes of treatment. From the perspective of green energy saving, 120 minutes is selected as the optimal time point.

[0099] The present invention provides a method for detoxifying aflatoxin from granular agricultural products. This method employs a mixture of ozone and micro / nano bubble water to remove or degrade the toxins on the surface of the granular agricultural products, ensuring that the inherent properties of the products remain unaffected. Because micro / nano bubbles possess characteristics such as large specific surface area, high mass transfer efficiency, and easy generation of free radicals, mixing micro / nano bubble water with ozone can improve the ozone mass transfer coefficient and solubility, promote the generation of hydroxyl free radicals from the micro / nano bubbles, and significantly enhance the ozone oxidation effect, thereby strengthening the detoxification effect.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detoxifying aflatoxin from granular agricultural products, characterized in that, Includes a gas-liquid mixing device, an ozone generator, a micro-nano bubble emitter, and a reaction tank; The inlet of the gas-liquid mixing device is connected to the reaction tank through an inlet pipe, the outlet of the gas-liquid mixing device is connected to the reaction tank through an outlet pipe, and the ozone outlet of the ozone generator is connected to the reaction tank through an ozone pipe. An ozone aerator and a micro-nano bubble releaser are installed near the bottom of the reaction tank. One end of the ozone pipeline is connected to the ozone aerator, and the other end of the water outlet pipeline is connected to the micro-nano bubble releaser. In this process, water in the reaction tank flows through the inlet pipe to the gas-liquid mixing device and mixes with a preset gas. Then, it flows through the outlet pipe to the micro-nano bubble releaser and releases micro-nano bubbles through the micro-nano bubble releaser. Ozone generated by the ozone generator is released through the ozone pipe and the ozone aeration head into the reaction tank containing the micro-nano bubbles. The micro-nano bubbles and ozone mix in the water to form an ozone micro-nano bubble mixture. The inlet pipe is equipped with an inlet regulating valve and a vacuum gauge, and the outlet pipe is equipped with an outlet regulating valve and a pressure gauge; When the detoxification device is in operation, the pressure gauge reading is maintained at 0.34 MPa by adjusting the inlet regulating valve and / or the outlet regulating valve.

2. The device for detoxifying aflatoxin from granular agricultural products according to claim 1, characterized in that, The gas-liquid mixing device includes a gas-liquid mixing pump and a water tank. The inlet of the gas-liquid mixing pump is connected to the reaction tank through the inlet pipe, the outlet of the gas-liquid mixing pump is connected to the inlet of the water tank, the air inlet of the gas-liquid mixing pump is connected to an air source, and the outlet of the water tank is connected to the reaction tank through the outlet pipe.

3. The aflatoxin detoxification device for granular agricultural products according to claim 2, characterized in that, The inlet end of the water inlet pipe, the micro-nano bubble releaser, and the ozone aerator are all immersed in the water in the reaction tank.

4. The device for detoxifying aflatoxin from granular agricultural products according to claim 2, characterized in that, The air inlet of the gas-liquid mixing pump is supplied with air or ozone, and the flow rate of the supplied air or ozone is greater than 0 and less than or equal to 1.5 L / min.

5. The device for detoxifying aflatoxin from granular agricultural products according to claim 1, characterized in that, The ozone generator is also provided with an air inlet, an air outlet, and an ozone inlet. An air flow meter is installed on the pipeline between the air outlet and the ozone inlet. Air enters the ozone generator through the air inlet, is compressed, flows through the air outlet to the air flow meter, and after the flow rate is adjusted by the air flow meter, it enters the ozone generator through the ozone inlet to produce ozone.

6. The device for detoxifying aflatoxin from granular agricultural products according to claim 1, characterized in that, The ozone aerator has a particle size of 1µm-10µm.

7. A method for detoxifying aflatoxin from granular agricultural products, characterized in that, Using the detoxification apparatus as described in any one of claims 1-6, the detoxification method includes the following steps: Step 1: Inject a predetermined volume of water into the reaction tank; Step 2: Turn on the gas-liquid mixing device. Water in the reaction tank flows into the gas-liquid mixing device through the water inlet pipe, mixes with the preset gas, and then flows through the water outlet pipe to the micro-nano bubble releaser, and releases micro-nano bubbles into the water through the micro-nano bubble releaser. Step 3: Turn on the ozone generator. The ozone generated by the ozone generator flows through the ozone pipeline to the ozone aeration head, and is released into the water of the reaction tank through the ozone aeration head and mixed with the micro-nano bubbles to obtain an ozone micro-nano bubble mixture. Step four: Add granular agricultural products containing aflatoxin to the ozone micro-nano bubble mixture, whereby the aflatoxin in the granular agricultural products is removed by the ozone micro-nano bubble mixture.

8. The method for detoxifying aflatoxin from granular agricultural products according to claim 7, characterized in that, The step of adding granular agricultural products containing aflatoxin to the ozone micro-nano bubble mixture includes: The granular agricultural products containing aflatoxin are placed in 100-300 mesh gauze or woven bags, and then the granular agricultural products packaged in the gauze or woven bags are placed in the ozone micro-nano bubble mixture.

9. The method for detoxifying aflatoxin from granular agricultural products according to claim 7, characterized in that, In step one, the volume of water injected into the reaction tank is greater than 4 L.

Images