Efficient detoxification method for whole soybeans

Abstract

The invention discloses an efficient detoxification method for whole soybeans, and relates to the technical field of food processing. The detoxification method comprises the following steps: (1) carrying out polishing treatment on whole soybeans, then carrying out freeze thawing treatment to obtain pretreated soybeans, spraying acidified water mist to the pretreated soybeans, and carrying out temperature control treatment to obtain primarily treated soybeans; (2) performing steam pressurization detoxification distillation on the primarily treated soybeans; then reducing the pressure to normal pressure, and adding an ethanol solution for micro-pressure detoxification distillation; reducing the pressure to normal pressure, adding an acetic acid solution, and performing micro-pressure detoxification distillation; and finally reducing the pressure to normal pressure, adding an ethanol solution, decompressing, detoxifying and distilling. The method solves the problems of poor phytic acid removal effect and high soybean protein nutrition loss of the existing treatment method, the whole soybean is detoxified by using the method, trypsin inhibition factors and purine can be efficiently removed, phytic acid can be well degraded, the dosage of ethanol and acetic acid is less, and the method is suitable for industrial production. The treatment time is shorter, and the loss of protein nutrition is less.

Description

Technical Field

[0001] The invention relates to the technical field of food processing, in particular to a highly efficient detoxification method for whole soybeans. Background Art

[0002] Soybeans are rich in protein, and their nutritional value is close to that of animal proteins. They are an important protein resource, but soybeans also contain many anti-nutritional factors, such as trypsin inhibitors, purines, phytic acid, flatulence factors, lipoxygenase, hemagglutinin, urease, and antigenic proteins. These anti-nutritional factors interfere with the digestion and absorption of nutrients, disrupt normal metabolism, and cause adverse physiological reactions. For example, trypsin inhibitors can inactivate trypsin in the small intestine, resulting in reduced protein digestibility and loss of exogenous nitrogen; phytic acid (the content of phytic acid in beans is 0.2% to 2.9%) can form insoluble complexes with protein molecules, affecting the digestibility of protein and its functional properties, and can bind to starch chains. Inhibit the degradation of starch and fat, and can also form complexes with mineral elements such as iron, calcium, magnesium, and zinc, affecting human digestion and absorption. Therefore, the presence of anti-nutritional factors seriously hinders the effective utilization of bean nutrients.

[0003] For soybean protein, proper heat treatment can loosen its protein molecular structure, expose more enzyme cleavage sites, and facilitate digestive enzymes to hydrolyze it into small molecular peptides and amino acids, which are easier to be digested and absorbed by the human body. However, high-temperature heat treatment or improper heat treatment will lead to excessive denaturation of protein, that is, destroy the protein structure, cause irreversible aggregation and cross-linking, form large molecular insoluble substances, and cannot be decomposed and absorbed by digestive enzymes. Some amino acids will also be destroyed and reduced, reducing its nutritional value. At present, industrial production often uses high temperatures of about 120-130℃ for a long time to eliminate or reduce the activity of anti-nutritional factors in soybeans. Some anti-nutritional factors even require higher temperatures. For example, phytic acid needs to be treated at a high temperature of 140℃ to reduce by about 60%. However, due to the high treatment temperature and long treatment time, the protein loss in soybeans is more serious.

[0004] The applicant has also conducted relevant research on the method of removing anti-nutritional factors from soybeans and published a related patent: Whole soybean detoxification and ripening technology (CN 102511746 B). This technology uses mixed hot steam of water, ethanol and acetic acid to detoxify whole soybeans, which can have a good removal effect on trypsin inhibitors and purines. However, the applicant found that this technology also has some problems in the production practice process, such as the phytic acid removal effect is not significant enough, and the amount of ethanol and acetic acid is relatively large. At this amount, high-temperature steam treatment for a long time will result in a high loss of soybean protein nutrition and a large loss of amino acids. Further improvements are needed to improve the nutritional value of the treated soybeans. Summary of the invention

[0005] In view of the above shortcomings, the present invention provides an efficient detoxification method for whole soybeans, which solves the problems of poor phytic acid removal effect and high loss of soybean protein nutrition in the current treatment methods. The present invention can be used to detoxify whole soybeans, which can not only efficiently remove trypsin inhibitors and purines, but also degrade phytic acid well, and use less ethanol and acetic acid, shorten the processing time, and reduce protein nutrition loss. The specific technical scheme is as follows:

[0006] An efficient detoxification method for whole soybeans comprises the following steps:

[0007] (1) polishing whole soybeans, and then freeze-thawing them to obtain pretreated soybeans, spraying acidified water mist on the pretreated soybeans, controlling the temperature to 35-37° C., and treating for 80-90 minutes to obtain primary treated soybeans;

[0008] (2) The primary treated soybeans are placed in a distillation tank, which is connected to an evaporator. After adding water of the same weight as the primary treated soybeans to the evaporator, water vapor is introduced into the distillation tank under pressure for detoxification distillation for 1 to 5 minutes; then the pressure is reduced to normal pressure, and an ethanol solution of 1 to 2% by weight of the primary treated soybeans is added to the evaporator, and mixed vapor is continuously introduced for detoxification distillation for 1 to 5 minutes under micro-pressure; then the pressure is reduced to normal pressure, and an acetic acid solution of 0.01 to 2% by weight of the primary treated soybeans is added to the evaporator, and mixed vapor is continuously introduced for detoxification distillation for 5 to 10 minutes under micro-pressure; finally, the pressure is reduced to normal pressure, and an ethanol solution of 0.001 to 0.015% by weight of the primary treated soybeans is added to the evaporator, mixed vapor is introduced for detoxification distillation for 1 to 2 minutes, and then the pressure is reduced for 3 to 5 minutes to obtain the product.

[0009] Furthermore, in step (1), the freeze-thaw treatment is to first place the dried whole soybeans in a cold storage at -5°C to -20°C for 10 to 12 hours, then take them out and thaw them at room temperature for 3 to 5 hours, then continue to refrigerate and thaw, and repeat 2 to 3 times.

[0010] Furthermore, in step (1), the acidified water mist is prepared by adjusting the pH of water to 5 to 6 using acetic acid.

[0011] Furthermore, in step (2), the pressure in the pressurization condition is 0.1 to 5 MPa.

[0012] Furthermore, in step (2), the pressure in the micro-pressure condition is 0.001 to 0.005 MPa.

[0013] Furthermore, in step (2), the pressure in the reduced pressure condition is -0.05 to -0.02 MPa.

[0014] The above pressures are all relative pressures.

[0015] Furthermore, in step (2), the mass concentration of the ethanol solution is 40-60%; the mass concentration of the acetic acid solution is 1-3%.

[0016] Furthermore, in step (2), the distillation tank processes 100 to 150 kg of soybeans; the steam flow rate of the water vapor is set to 3 to 5 kg / min, and the steam flow rate of the mixed steam is set to 1 to 2 kg / min.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can efficiently remove anti-nutritional factors such as trypsin inhibitors, purines and phytic acid, while preventing the nutritional value of soybean protein from being reduced due to excessive denaturation. It was found through testing that after soybeans were detoxified using the method of the present invention, the trypsin inhibitor content was less than 0.2 mg / g, the inosine nucleotide content was reduced to 0.11-0.18 mg / 100g, the guanine nucleotide content was reduced to 1.44-1.72 mg / 100g, the adenine nucleotide content was reduced to 2.39-2.71 mg / 100g, the phytic acid removal rate was more than 90%, and the anti-nutritional factor removal effect was significant. Compared with ordinary soybeans (ordinary soybean trypsin inhibitor>75 mg / g, purine nucleotides about 100 mg / 100g), most of the anti-nutritional factors have been removed, reaching the qualified detoxified soybean standard.

[0019] 2. The present invention performs freeze-thaw treatment after polishing soybeans. Repeated freeze-thaw treatment can enhance the permeability of soybean cell walls. At this time, water mist can smoothly penetrate into the cells. Under certain temperature (35-37° C.) and pH (5-6) conditions, endogenous phytase in soybeans is activated, and endogenous phytase can degrade phytic acid. Acetic acid promotes the release of phytic acid, so that the endogenous phytase has a better effect and a higher efficiency in removing phytic acid. Finally, the removal rate of phytic acid can be as high as more than 90%.

[0020] 3. The present invention first introduces water vapor under pressurized conditions to perform detoxification distillation. This step can not only perform preliminary detoxification, but also promote soybean expansion, increase the heating area of ​​anti-nutritional factors, and promote their efficient removal even if very little ethanol and acetic acid are used in the later treatment; then, ethanol and acetic acid are continuously introduced under micro-pressure conditions, which can promote the removal of anti-nutritional factors, reduce the amount of ethanol and acetic acid and the treatment time, and further reduce the loss of amino acids and proteins (short-term high-temperature treatment has a smaller protein loss); finally, a smaller amount of ethanol is used to completely remove the remaining small amount of anti-nutritional factors, and water vapor is quickly volatilized under reduced pressure conditions, so that the anti-nutritional factors can be quickly removed with the steam, and at the same time, reduced pressure can reduce the temperature, which can reduce the loss of amino acids and proteins to a lower level, thereby ensuring the nutritional value of soybeans. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0022] The pressures mentioned below are all relative pressures.

[0023] Example 1

[0024] The highly efficient detoxification method of whole soybeans comprises the following steps:

[0025] (1) 100 kg of whole soybeans were polished and then freeze-thawed, i.e., the dried whole soybeans were placed in a cold storage at -5°C for 12 hours, then taken out and thawed at room temperature for 3 hours, and then refrigerated and thawed for 3 times, and then the pre-treated soybeans were sprayed with acidified water mist, the temperature was controlled at 35°C, and the treatment was performed for 90 minutes to obtain primary treated soybeans; the acidified water mist was prepared by adjusting the pH of water to 5 using acetic acid.

[0026] (2) The primary treated soybeans are placed in a distillation tank, which is connected to an evaporator. The distillation tank and the evaporator are connected by a pipeline. After adding water of the same weight as the primary treated soybeans to the evaporator, water vapor is introduced into the distillation tank under a pressure of 0.1 MPa for detoxification distillation for 5 minutes, and the steam flow rate of the water vapor is set to 3 kg / min; then the pressure is reduced to normal pressure, and a 40% ethanol solution of 1% by weight of the primary treated soybeans is added to the evaporator, and the mixed steam is continued to be introduced under a micro-pressure condition of 0.001 MPa for detoxification distillation for 5 minutes, and the steam flow rate of the mixed steam is set to 1 kg / min. n; then reduce to normal pressure, add 1% acetic acid solution with a mass concentration of 0.01% of the weight of the primary treated soybeans to the evaporator, continue to pass mixed steam for detoxification distillation for 10 minutes under a micro-pressure condition of 0.001MPa, and the steam flow rate of the mixed steam is set to 1kg / min; finally reduce to normal pressure, add 40% ethanol solution with a mass concentration of 0.001% of the weight of the primary treated soybeans to the evaporator, pass mixed steam for detoxification distillation for 1 minute, and the steam flow rate of the mixed steam is set to 1kg / min, and then decompress at 80°C for 3 minutes, and the decompression pressure is -0.05MPa. Take out the soybeans from the distillation tank, vacuum pack them, and leave the factory.

[0027] Example 2

[0028] The highly efficient detoxification method of whole soybeans comprises the following steps:

[0029] (1) 150 kg of whole soybeans were polished and then freeze-thawed, i.e., the dried whole soybeans were placed in a cold storage at -20°C for 10 hours, taken out and thawed at room temperature for 5 hours, and then refrigerated and thawed, and repeated twice to obtain pretreated soybeans. Acidified water mist was sprayed on the pretreated soybeans, the temperature was controlled at 37°C, and the treatment was performed for 80 minutes to obtain primary treated soybeans; the acidified water mist was prepared by adjusting the pH of water to 6 using acetic acid.

[0030] (2) The primary treated soybeans are placed in a distillation tank, which is connected to an evaporator. The distillation tank and the evaporator are connected by a pipeline. After adding water of the same weight as the primary treated soybeans to the evaporator, water vapor is introduced into the distillation tank under a pressure of 5 MPa for detoxification distillation for 1 minute, and the steam flow rate of the water vapor is set to 5 kg / min; then the pressure is reduced to normal pressure, and a 60% ethanol solution with a mass concentration of 2% of the weight of the primary treated soybeans is added to the evaporator. The mixed steam is continued to be introduced for detoxification distillation for 1 minute under a micro-pressure condition of 0.005 MPa, and the steam flow rate of the mixed steam is set to 2 kg / m in; then reduce to normal pressure, add 3% acetic acid solution with a mass concentration of 2% of the weight of the primary treated soybeans to the evaporator, continue to pass mixed steam for detoxification distillation for 5 minutes under a micro-pressure condition of 0.005MPa, and the steam flow rate of the mixed steam is set to 2kg / min; finally reduce to normal pressure, add 60% ethanol solution with a mass concentration of 0.015% of the weight of the primary treated soybeans to the evaporator, pass mixed steam for detoxification distillation for 2 minutes, and the steam flow rate of the mixed steam is set to 2kg / min, and then decompress at 70°C for 5 minutes, and the decompression pressure is -0.02MPa. Take out the soybeans from the distillation tank, vacuum pack them, and leave the factory.

[0031] Example 3

[0032] The highly efficient detoxification method of whole soybeans comprises the following steps:

[0033] (1) 120 kg of whole soybeans were polished and then freeze-thawed, i.e., the dried whole soybeans were placed in a cold storage at -14°C for 11 hours, taken out and thawed at room temperature for 4 hours, and then refrigerated and thawed for 3 times to obtain pretreated soybeans. Acidified water mist was sprayed on the pretreated soybeans, the temperature was controlled at 36°C, and the treatment was performed for 88 minutes to obtain primary treated soybeans; the acidified water mist was prepared by adjusting the pH of water to 5.5 with acetic acid.

[0034] (2) The primary treated soybeans are placed in a distillation tank, which is connected to an evaporator. The distillation tank and the evaporator are connected by a pipeline. After adding water of the same weight as the primary treated soybeans to the evaporator, water vapor is introduced into the distillation tank under a pressure of 2.5 MPa for detoxification distillation for 3 minutes, and the steam flow rate of the water vapor is set to 4 kg / min; then the pressure is reduced to normal pressure, and a 50% ethanol solution with a mass concentration of 1.5% of the weight of the primary treated soybeans is added to the evaporator. The mixed steam is continued to be introduced for detoxification distillation for 4 minutes under a micro-pressure condition of 0.003 MPa, and the steam flow rate of the mixed steam is set to 1.5 kg / m in; then reduce to normal pressure, add 1% of the weight of the primary treated soybeans and a 2% acetic acid solution to the evaporator, continue to pass mixed steam to detoxify and distill for 6 minutes under a micro-pressure condition of 0.003MPa, and the steam flow rate of the mixed steam is set to 1.5kg / min; finally reduce to normal pressure, add 0.01% of the weight of the primary treated soybeans and a 50% ethanol solution to the evaporator, pass mixed steam to detoxify and distill for 1.5 minutes, and the steam flow rate of the mixed steam is set to 1.5kg / min, and then decompress at 75°C for 4 minutes, and the decompression pressure is -0.04MPa. Take out the soybeans from the distillation tank, vacuum pack them, and leave the factory.

[0035] The removal of anti-nutritional factors in soybeans treated in Examples 1 to 3 was detected respectively, and the results are shown in Table 1:

[0036] Sample description: Example 1 product "Kangzhidou" sample 1 box, 75g / bag, 75g x 30 bags / box, vacuum packed, outer carton packed, packed in good condition. The samples of Example 2 and Example 3 have the same specifications as Example 1, and the packaging is intact.

[0037] Inspection items:

[0038] Trypsin inhibitor concentration: tested according to GB 5009.224-2016;

[0039] Purine content: The inosine nucleotide content, guanine nucleotide content and adenine nucleotide content are all tested with reference to GB 5413.40-2016 and determined by high performance liquid chromatography (HPLC);

[0040] Phytic acid removal rate: Phytic acid removal rate = (phytic acid content of soybeans before treatment - phytic acid content of soybeans after treatment) / phytic acid content of soybeans before treatment × 100%, wherein the phytic acid content is detected with reference to GB 5009.153-2016.

[0041] Table 1 Effect of removing anti-nutritional factors from soybean after treatment in each embodiment

[0042]

[0043]

[0044] Table 1 shows that the trypsin inhibitor concentration of soybeans treated by the method of the present invention is less than 0.2 mg / g, the inosine nucleotide content is reduced to 0.11-0.18 mg / 100g, the guanine nucleotide content is reduced to 1.44-1.72 mg / 100g, the adenine nucleotide content is reduced to 2.39-2.71 mg / 100g, the phytic acid removal rate is more than 90%, and the anti-nutritional factor removal effect is significant. Compared with ordinary soybeans (ordinary soybean trypsin inhibitor> 75 mg / g, purine nucleotides are about 100 mg / 100g), most of the anti-nutritional factors have been removed, reaching the qualified detoxified soybean standard.

[0045] The changes of amino acids in soybeans before and after the treatment of Examples 1 to 3 were detected respectively, and the results are shown in Table 2:

[0046] Each embodiment takes the same batch of soybeans, a part of which is directly extracted with soybean protein and used to detect the amino acid content as the amino acid content before treatment, and the other part of soybeans is detoxified by the method of each embodiment. After the treatment, soybean protein is extracted and the amino acid content is detected, and the amino acid loss rate = (amino acid content before treatment-amino acid content after treatment) / amino acid content before treatment × 100%. Among them, the method of extracting soybean protein is: after the soybeans are crushed and ground into pulp, the pH value is adjusted to 8.0, stirred at room temperature for 90 minutes, filtered to remove insoluble impurities, centrifuged for 10 minutes, the filtrate is taken, the pH value of the filtrate is adjusted to 4.5, left to stand at room temperature for 30 minutes, centrifuged for 5 minutes, the supernatant is removed, and the precipitate is collected to obtain soybean protein isolate. After the soybean protein is extracted, it is detected by an amino acid automatic analyzer.

[0047] Table 2 Changes of amino acids in soybeans before and after treatment in each example

[0048]

[0049]

[0050] Table 2 shows that the loss rate of amino acids in detoxification by the method of the present invention is very small. Except for the cystine loss rate of about 10%, the loss rates of other amino acids can be basically controlled within 1-8%, and some individual amino acids are not even lost, thus ensuring the nutritional value of soybeans.

[0051] Comparative Example 1

[0052] The soybean detoxification process in this comparative example does not include step (1), and the other steps are the same as those in Example 1.

[0053] Comparative Example 2

[0054] In the soybean detoxification treatment step (1) of this comparative example, no freeze-thaw treatment was performed, and acidified water mist was directly sprayed. The other steps were the same as those in Example 1.

[0055] The content of each anti-nutritional factor of Comparative Example 1 and Comparative Example 2 was tested, and the results are shown in Table 3:

[0056] Table 3 Comparison of test results of each group

[0057]

[0058] The data of Example 1 and Comparative Example 1 show that without step (1), the phytic acid removal effect is poor, and the removal rate is only 68.2%, indicating that freeze-thaw treatment combined with spraying water mist treatment after acidification can effectively remove phytic acid. The data of Example 1 and Comparative Examples 1 and 2 show that freeze-thaw treatment not only has an enhanced effect on the removal of phytic acid, but also can improve the removal effect of trypsin inhibitors and purines.

[0059] Comparative Example 3

[0060] In the soybean detoxification process of this comparative example, in step (2), water vapor was not introduced under pressure to perform detoxification distillation, but ethanol was directly added for distillation. The other steps were the same as those in Example 1.

[0061] Comparative Example 4

[0062] In the soybean detoxification process of this comparative example, the "micro-pressure condition" of step (2) was changed to "normal pressure", and the other steps were the same as those in Example 1.

[0063] The content of each anti-nutritional factor of Comparative Example 3 and Comparative Example 4 was tested, and the results are shown in Table 4:

[0064] Table 4 Comparison of test results of each group

[0065]

[0066] The data of Example 1 and Comparative Example 3 in the above table show that the preliminary treatment by introducing water vapor under pressure before distilling ethanol and acetic acid can improve the concentration of trypsin inhibitors and the removal effect of purine. The data of Example 1 and Comparative Example 4 show that the removal effect of trypsin inhibitors and purine can be improved by using micro-pressure conditions during distillation with ethanol and acetic acid.

[0067] Comparative Example 5

[0068] In the soybean detoxification process of this comparative example, the "reduced pressure condition" of step (2) was changed to "normal pressure", and the other steps were the same as those in Example 1.

[0069] Comparative Example 6

[0070] The detoxification is carried out by using the patented whole soybean detoxification and ripening technology (CN 102511746 B).

[0071] The changes of amino acids in soybeans before and after the treatment of Comparative Example 5 and Comparative Example 6 were detected respectively, and the detection method was the same as above. The results are shown in Table 5:

[0072] Table 5 Changes of amino acids in soybeans before and after treatment of each comparative example

[0073] Category / Project Example 1 Loss rate (%) Comparative Example 5 Loss Rate (%) Comparative Example 6 Loss Rate (%) Aspartic acid Asp 2.5 3.8 6.3 Threonine 3.6 4.1 6.2 Ser 2.2 2.8 5.1 Glu 1.5 2.1 4.8 Proline Pro 1.0 1.7 3.8 Glycine 0 1.0 3.4 Alanine Ala 2.1 2.9 5.9 Cystine 12.2 16.5 21.6 Valine 5.3 6.6 9.5 MethionineMet 0.9 2.2 5.3 Isoleucine Ile 1.0 1.7 3.5 Leucine 3.3 4.2 6.5 Tyrosine 0 1.0 2.7 Phenylalanine pHe 0 0.5 1.6 His 0 0.8 2.4 Lysine 5.2 6.3 9.8 Arginine 3.2 3.9 6.1 Tryptophan Trp 7.9 8.4 10.7

[0074] The data of Example 1 and Comparative Example 5 show that the loss rate of amino acids can be reduced by performing a decompression treatment when adding ethanol for distillation at the end; the data of Example 1 and Comparative Example 6 show that compared with the traditional method, the loss rate of amino acids in the detoxification method of the present invention is smaller, thereby ensuring the nutritional value of soybeans.

[0075] In summary, the present invention solves the problems of poor phytic acid removal effect and high soybean protein nutrient loss in the current treatment methods. The present invention is used to detoxify whole soybeans, which can not only efficiently remove trypsin inhibitors and purines, but also degrade phytic acid well, with less ethanol and acetic acid usage, shorter processing time, and less protein nutrient loss.

[0076] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A highly efficient detoxification method for whole soybeans, characterized in that: The following steps are involved: (1) polishing whole soybeans, and then freeze-thawing them to obtain pretreated soybeans, spraying acidified water mist on the pretreated soybeans, controlling the temperature to 35-37° C., and treating for 80-90 minutes to obtain primary treated soybeans; (2) The primary treated soybeans are placed in a distillation tank, which is connected to an evaporator. After adding water of the same weight as the primary treated soybeans into the evaporator, water vapor is introduced into the distillation tank, and detoxification distillation is performed under pressure for 1 to 5 minutes; then the pressure is reduced to normal pressure, and an ethanol solution of 1 to 2% by weight of the primary treated soybeans is added into the evaporator, and mixed vapor is continuously introduced, and detoxification distillation is performed under micro-pressure for 1 to 5 minutes; then the pressure is reduced to normal pressure, and an acetic acid solution of 0.01 to 2% by weight of the primary treated soybeans is added into the evaporator, and mixed vapor is continuously introduced, and detoxification distillation is performed under micro-pressure for 5 to 10 minutes; finally, the pressure is reduced to normal pressure, and an ethanol solution of 0.001 to 0.015% by weight of the primary treated soybeans is added into the evaporator, and mixed vapor is introduced for detoxification distillation for 1 to 2 minutes, and then the pressure is reduced for 3 to 5 minutes to obtain the product.

2. The method for efficiently detoxifying whole soybeans according to claim 1, characterized in that: In step (1), the freeze-thaw treatment is to first place the dried whole soybeans in a cold storage at -5°C to -20°C for 10 to 12 hours, then take them out and place them at room temperature for thawing for 3 to 5 hours, then continue to refrigerate and thaw, and repeat 2 to 3 times.

3. The method for efficiently detoxifying whole soybeans according to claim 1, characterized in that: In step (1), the acidified water mist is prepared by adjusting the pH of water to 5 to 6 using acetic acid.

4. The method for efficiently detoxifying whole soybeans according to claim 1, characterized in that: In step (2), the pressure in the pressurization condition is 0.1 to 5 MPa.

5. The method for efficiently detoxifying whole soybeans according to claim 1, characterized in that: In step (2), the pressure in the micro-pressure condition is 0.001 to 0.005 MPa.

6. The method for efficiently detoxifying whole soybeans according to claim 1, characterized in that: In step (2), the pressure in the reduced pressure condition is -0.05 to -0.02 MPa.

7. The method for efficiently detoxifying whole soybeans according to claim 1, characterized in that: In step (2), the mass concentration of the ethanol solution is 40-60%; the mass concentration of the acetic acid solution is 1-3%.

8. The method for efficiently detoxifying whole soybeans according to claim 1, characterized in that: In step (2), the distillation tank processes 100-150 kg of soybeans; the steam flow rate of the water vapor is set to 3-5 kg / min, and the steam flow rate of the mixed steam is set to 1-2 kg / min.

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