Preparation method of deodorant for dairy farm

Abstract

The preparation method of the deodorant for the dairy farm comprises the following steps: S01, uniformly mixing corn starch, an acidifying agent and zinc propionate, then performing steam pressurization, setting the pressure to be 0.2-0.3 MPa, and performing pressure relief treatment after 100-120 seconds; s02, deionized water is added into S01, uniform stirring is performed, then CGT enzyme is added, the temperature is increased to 75-85 DEG C, and stirring is performed for 10-20 min; s03, cooling the S02 to 50 DEG C, slowly adding zinc propionate, continuously adding CGT enzyme, stirring and reacting for 5-8 hours, cooling and filtering to obtain a precursor; and S04, taking the precursor obtained in the step S03, adding deionized water, a surfactant, sodium carbonate and sodium bicarbonate, and adjusting the pH value to 6-7 to prepare the deodorant for the dairy farm.

Description

Technical Field

[0001] The invention relates to the technical field of animal husbandry, and in particular to a method for preparing a deodorant for a dairy farm. Background Art

[0002] The odor pollution in cattle farms comes from feces, sewage, bedding, feed, decomposition of dead cattle, gas discharged from the digestive tract, sebaceous glands, sweat glands, pheromone secretions, etc. Among them, the decomposition of organic matter in cow feces and sewage during the stacking process is the main source of farm odor. The organic matter in the feces is fermented anaerobicly by microorganisms to form various harmful gases with odor, which become the main body of odorous substances. The cattle farm is the source of odor. The feces and urine excrement produced by dairy cows during their growth accumulate in the cattle farm, which is the main cause of odor. The silage grass fed to them will also produce odor when it deteriorates in the natural environment. After the feces and urine excrement of dairy cows are cleaned, they are transported to the feces pretreatment area for dry and wet separation, that is, pretreatment for the subsequent organic fertilizer production. Since this area is a feces-rich area, the feces produced after corruption has a very strong odor, and it is a key deodorization area. The composting area is where the feces are pre-treated and composted to produce organic fertilizer. The odor is generally low during the composting process, but a lot of odor will be generated during the turning process.

[0003] There are many defects and shortcomings in various deodorants used in cattle farms on the market: Limited effect: Although deodorants can reduce odors to a certain extent, their effect is often limited and they cannot completely eliminate odors. The main function of deodorants is to cover up or neutralize odors, rather than solving the problem fundamentally; some deodorants contain toxic and harmful ingredients that pose potential hazards to the environment and human health. Long-term use of chemical deodorants may have an impact on the health of cattle farms and people; some types of deodorants are greatly affected by external environment and conditions, and some deodorants are not effective in humid environments because humidity reduces the effectiveness of deodorants. Some deodorants will also lose their original effects if there is insufficient light or low temperature. The present invention can not only solve the above-mentioned defects, but also has a significant deodorizing effect, which is fast and long-lasting, and provides a healthy and good environmental condition for cattle farm breeding enterprises. Summary of the invention

[0004] In order to solve the problems and defects of the above deodorants, the present invention discloses a method for preparing a deodorant for dairy farms, and the deodorant is widely used in dairy farms.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a method for preparing a deodorant for a dairy farm, comprising the following steps:

[0007] S01: Mix corn starch, acidulant and zinc propionate, then steam pressurize to 0.2-0.3MPa, and release the pressure after 100-120s;

[0008] S02: Add deionized water to S01, stir evenly, then add CGTase, heat to 75-85°C, and stir for 10-20 minutes;

[0009] S03: Cool S02 to 50°C, slowly add zinc propionate, continue to add CGT enzyme, stir the reaction for 5-8h, cool and filter to obtain the precursor;

[0010] S04: Take the precursor obtained in S03, add deionized water, surfactant, sodium carbonate and sodium bicarbonate, adjust the pH to 6-7, and prepare a deodorant for dairy farms.

[0011] Furthermore, in step S01, the mass ratio of corn starch, acidulant and zinc propionate is 1:0.02-0.06:0.05-0.5.

[0012] Furthermore, the acidulant is a mixture of ethylenediaminetetraacetic acid and oxalic acid, and the mass ratio of ethylenediaminetetraacetic acid to oxalic acid is 1:2.

[0013] Furthermore, in step S02, the mass ratio of deionized water to corn starch in step S01 is 50-300:1.

[0014] Furthermore, in step S02, the mass ratio of CGTase to corn starch in step S01 is 0.002-0.003:1.

[0015] Furthermore, in step S03, the mass ratio of zinc propionate to corn starch in step S01 is 0.02-0.2:1.

[0016] Furthermore, in step S03, the mass ratio of CGTase to corn starch in step S01 is 0.005-0.006:1.

[0017] Furthermore, in step S04, the mass ratio of the precursor, deionized water, surfactant, and sodium bicarbonate is 1:50-200:0.2-2:0.01-0.1.

[0018] Furthermore, in step S04, the mass ratio of sodium bicarbonate to sodium carbonate is 2:1.

[0019] Furthermore, the surfactant is one or both of sodium octadecyl sulfonate and sodium octadecyl sulfate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The addition of the acidulant in step S01 of the present invention is to pre-treat the starch by acidification, the purpose of pressurization is to perform heat activation, expand the starch, and increase the porosity, and the addition of zinc propionate is to allow zinc ions to occupy more pores in advance, play a seed-guiding role, and generate zinc-based dextrin coordinated porous compounds. The addition of CGT enzyme in step S02 is for enzymatic hydrolysis; the continued addition of CGT enzyme in step S03 is for secondary enzymatic hydrolysis, and the addition of zinc propionate is to generate a more stable zinc-based dextrin coordinated porous compound, the product yield is higher, and the nitrogen-containing compounds and sulfur-containing compounds in the odor can be adsorbed, and there is more time to complex with the odor molecules to generate tasteless, non-toxic and harmless macromolecular compounds, thereby achieving the purpose of removing the odor; the addition of surfactant in step S04 is for better system compatibility, and the addition of sodium carbonate and sodium bicarbonate plays a role in adjusting pH.

[0022] The material selection of the invention is green and environmentally friendly, non-toxic and non-irritating, and is an environmentally friendly deodorant for dairy farms; it is not affected by external conditions, temperature and environment, and the deodorizing effect is faster and more lasting; the product system of the invention is a uniform liquid, has good stability, and is easy to use; the invention improves the environmental conditions of dairy farms and provides a more environmentally friendly place for dairy farm production. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] A deodorant for dairy farms: its preparation method comprises the following steps:

[0026] S01: 100g corn starch, 2g acidulant (mass ratio of ethylenediaminetetraacetic acid to oxalic acid is 1:2), and 5g zinc propionate are mixed, and then steam pressurized with a pressure setting of 0.2MPa, and the pressure is released after 100s;

[0027] S02: Add 5000 g of deionized water to S01, stir evenly, then add 200 mg of CGTase, heat to 75°C, and stir for 10 min;

[0028] S03: Cool S02 to 50°C, slowly add 2g zinc propionate, and continue to add 500mg CGT enzyme, stir and react for 5h, cool and filter to obtain the precursor;

[0029] S04: Take 100 g of the precursor obtained in S03, add 5000 g of deionized water, 2 g of sodium octadecyl sulfate, 0.5 g of sodium carbonate and 1 g of sodium bicarbonate, adjust the pH to 6.0, and prepare a deodorant for dairy farms.

[0030] The deodorizing effect and long-lasting deodorizing performance of the deodorant are tested as follows:

[0031] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 1 below.

[0032] Table 1 Odor concentration and removal rate

[0033]

[0034] The rest is the same as Example 1, except that corn starch is not added, and other components and processes remain unchanged. The following test is conducted on the deodorizing effect and long-lasting deodorizing performance of the deodorant:

[0035] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 2 below.

[0036] Table 2 Odor concentration and removal rate

[0037]

[0038] Example 2

[0039] A deodorant for dairy farms: its preparation method comprises the following steps:

[0040] S01: 100g corn starch, 6g acidulant (mass ratio of ethylenediaminetetraacetic acid to oxalic acid is 1:2), and 50g zinc propionate are mixed, and then steam pressurized with the pressure set to 0.3MPa, and the pressure is released after 120s;

[0041] S02: Add 30000 g of deionized water to S01, stir evenly, then add 300 mg of CGTase, heat to 85°C, and stir for 20 min;

[0042] S03: Cool S02 to 50°C, slowly add 20g zinc propionate, and continue to add 600mg CGT enzyme, stir and react for 8h, cool and filter to obtain the precursor;

[0043] S04: Take 100 g of the precursor obtained in S03, add 20,000 g of deionized water, 3 g of sodium octadecyl sulfate, 3 g of sodium octadecyl sulfonate, 5 g of sodium carbonate and 10 g of sodium bicarbonate, adjust the pH to 7.0, and prepare a deodorant for dairy farms.

[0044] The deodorizing effect and long-lasting deodorizing performance of the deodorant are tested as follows:

[0045] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 3 below.

[0046] Table 3 Odor concentration and removal rate

[0047]

[0048] The rest is the same as Example 2, except that no acidulant is added, and other components and processes remain unchanged. The following test is conducted on the deodorizing effect and long-lasting deodorizing performance of the deodorant:

[0049] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 4 below.

[0050] Table 4 Odor concentration and removal rate

[0051]

[0052] Example 3

[0053] A deodorant for dairy farms: its preparation method comprises the following steps:

[0054] S01: 100g corn starch, 3g acidulant (mass ratio of ethylenediaminetetraacetic acid to oxalic acid is 1:2), and 10g zinc propionate are mixed, and then steam pressurized with the pressure set to 0.22MPa, and the pressure is released after 105s;

[0055] S02: Add 6000 g of deionized water to S01, stir evenly, then add 220 mg of CGTase, heat to 78°C, and stir for 12 min;

[0056] S03: Cool S02 to 50°C, slowly add 4g zinc propionate, and continue to add 520mg CGT enzyme, stir and react for 5.5h, cool and filter to obtain the precursor;

[0057] S04: Take 100 g of the precursor obtained in S03, add 6000 g of deionized water, 1 g of sodium octadecyl sulfate, 1.2 g of sodium octadecyl sulfonate, 0.6 g of sodium carbonate and 1.2 g of sodium bicarbonate, adjust the pH to 6.2, and prepare a deodorant for dairy farms.

[0058] The deodorizing effect and long-lasting deodorizing performance of the deodorant are tested as follows:

[0059] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and 25 points of the grid were tested. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 5 below.

[0060] Table 5 Odor concentration and removal rate

[0061]

[0062] The rest is the same as in Example 3, except that zinc propionate is not added, and the same mass of zinc acetate is added. The other components and processes remain unchanged, and the deodorizing effect and long-lasting deodorizing performance of the deodorant are tested as follows:

[0063] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 6 below.

[0064] Table 6 Odor concentration and removal rate

[0065]

[0066] Example 4

[0067] A deodorant for dairy farms: its preparation method comprises the following steps:

[0068] S01: 100g corn starch, 4g acidulant (mass ratio of ethylenediaminetetraacetic acid to oxalic acid is 1:2), and 40g zinc propionate are mixed, and then steam pressurized with the pressure set to 0.28MPa, and the pressure is released after 115s;

[0069] S02: Add 28000 g of deionized water to S01, stir evenly, then add 280 mg of CGTase, heat to 82°C, and stir for 18 min;

[0070] S03: Cool S02 to 50°C, slowly add 18g zinc propionate, and continue to add 580mg CGT enzyme, stir the reaction for 7.5h, cool and filter to obtain the precursor;

[0071] S04: Take 100 g of the precursor obtained in S03, add 18,000 g of deionized water, 2.5 g of sodium octadecyl sulfate, 2.5 g of sodium octadecyl sulfonate, 4 g of sodium carbonate and 8 g of sodium bicarbonate, adjust the pH to 6.8, and prepare a deodorant for dairy farms.

[0072] The deodorizing effect and long-lasting deodorizing performance of the deodorant are tested as follows:

[0073] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 7 below.

[0074] Table 7 Odor concentration and removal rate

[0075]

[0076] The rest is the same as Example 4, except that CGTase is not added, and other components and processes remain unchanged. The following test is conducted on the deodorizing effect and long-lasting deodorizing performance of the deodorant:

[0077] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 8 below.

[0078] Table 8 Odor concentration and removal rate

[0079]

[0080] Example 5

[0081] A deodorant for dairy farms: its preparation method comprises the following steps:

[0082] S01: 100g corn starch, 3g acidulant (mass ratio of ethylenediaminetetraacetic acid to oxalic acid is 1:2), and 25g zinc propionate are mixed, and then steam pressurized with the pressure set to 0.25MPa, and the pressure is released after 110s;

[0083] S02: Add 15000 g of deionized water to S01, stir evenly, then add 250 mg of CGTase, heat to 80°C, and stir for 15 min;

[0084] S03: Cool S02 to 50°C, slowly add 11g zinc propionate, and continue to add 550mg CGT enzyme, stir the reaction for 6.5h, cool and filter to obtain the precursor;

[0085] S04: Take 100 g of the precursor obtained in S03, add 10,000 g of deionized water, 5 g of sodium octadecyl sulfonate, 2.5 g of sodium carbonate and 5 g of sodium bicarbonate, adjust the pH to 6.5, and prepare a deodorant for dairy farms.

[0086] The deodorizing effect and long-lasting deodorizing performance of the deodorant are tested as follows:

[0087] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the rooms were covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 9 below.

[0088] Table 9 Odor concentration and removal rate

[0089]

[0090] The rest is the same as Example 5, except that sodium octadecyl sulfonate is not added, and other components and processes remain unchanged. The following test is conducted on the deodorizing effect and long-lasting deodorizing performance of the deodorant:

[0091] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each point was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 10 below.

[0092] Table 10 Odor concentration and removal rate

[0093]

[0094] Example 6

[0095] A deodorant for dairy farms: its preparation method comprises the following steps:

[0096] S01: 100g corn starch, 5g acidulant (mass ratio of ethylenediaminetetraacetic acid to oxalic acid is 1:2), and 30g zinc propionate are mixed, and then steam pressurized with the pressure set to 0.26MPa, and the pressure is released after 112s;

[0097] S02: Add 16000 g of deionized water to S01, stir evenly, then add 260 mg of CGTase, heat to 81°C, and stir for 17 min;

[0098] S03: Cool S02 to 50°C, slowly add 12g zinc propionate, continue to add 560mg CGT enzyme, stir the reaction for 6.8h, cool and filter to obtain the precursor;

[0099] S04: Take 100 g of the precursor obtained in S03, add 12000 g of deionized water, 1.6 g of sodium octadecyl sulfate, 1.7 g of sodium octadecyl sulfonate, 2.6 g of sodium carbonate and 5.2 g of sodium bicarbonate, adjust the pH to 6.6, and prepare a deodorant for dairy farms.

[0100] The deodorizing effect and long-lasting deodorizing performance of the deodorant are tested as follows:

[0101] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 11 below.

[0102] Table 11 Odor concentration and removal rate

[0103]

[0104] The rest is the same as Example 6, except that sodium carbonate and sodium bicarbonate are not added, and other components and processes remain unchanged. The following test is conducted on the deodorizing effect and long-lasting deodorizing performance of the deodorant:

[0105] Two rooms of the same specifications of 10 square meters were prepared in the dairy farm. The bottom of the room was covered with dairy manure with an area of ​​200cm×100cm and a thickness of 2cm. The room without deodorant was used as the control room, and the other room with deodorant was used as the test room. The odor concentration was tested 10 minutes and 7 days after spraying the deodorant. A 5×5 grid was adopted in the room, and the test was carried out at 25 points of the grid. Then the average value of the odor concentration of each 25 points was taken to calculate the odor concentration removal efficiency; the odor concentration test results of 10 minutes and 7 days are shown in Table 12 below.

[0106] Table 12 Odor concentration and removal rate

[0107]

[0108] The deodorant for cattle farms prepared by Example 4 has a factory inspection report as shown in Table 13.

[0109] Table 13 Factory inspection of deodorants for dairy farms

[0110]

[0111] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0112] It should be noted that the above content only illustrates the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications all fall within the protection scope of the claims of the present invention.

Claims

1. A method for preparing a deodorant for a dairy farm, characterized in that: The following steps are involved: S01: Mix corn starch, acidulant and zinc propionate, then steam pressurize to 0.2-0.3MPa, and release the pressure after 100-120s; S02: Add deionized water to S01, stir evenly, then add CGTase, heat to 75-85°C, and stir for 10-20 minutes; S03: Cool S02 to 50°C, slowly add zinc propionate, continue to add CGT enzyme, stir the reaction for 5-8h, cool and filter to obtain the precursor; S04: Take the precursor obtained in S03, add deionized water, surfactant, sodium carbonate and sodium bicarbonate, adjust the pH to 6-7, and prepare a deodorant for dairy farms.

2. The method for preparing a deodorant for dairy farms according to claim 1, characterized in that: In step S01, the mass ratio of corn starch, acidulant and zinc propionate is 1:0.02-0.06:0.05-0.

5.

3. The method for preparing a deodorant for dairy farms according to claim 2, characterized in that: The acidulant is a mixture of ethylenediaminetetraacetic acid and oxalic acid, and the mass ratio of ethylenediaminetetraacetic acid to oxalic acid is 1:

2.

4. The method for preparing a deodorant for dairy farms according to claim 1, characterized in that: In step S02, the mass ratio of deionized water to corn starch in step S01 is 50-300:

1.

5. The method for preparing a deodorant for dairy farms according to claim 1, characterized in that: In step S02, the mass ratio of CGTase to corn starch in step S01 is 0.002-0.003:

1.

6. The method for preparing a deodorant for dairy farms according to claim 1, characterized in that: In step S03, the mass ratio of zinc propionate to corn starch in step S01 is 0.02-0.2:

1.

7. The method for preparing a deodorant for dairy farms according to claim 1, characterized in that: In step S03, the mass ratio of CGTase to corn starch in step S01 is 0.005-0.006:

1.

8. The method for preparing a deodorant for dairy farms according to claim 1, characterized in that: In step S04, the mass ratio of the precursor, deionized water, surfactant, and sodium bicarbonate is 1:50-200:0.2-2:0.01-0.

1.

9. The method for preparing a deodorant for dairy farms according to claim 1, characterized in that: In step S04, the mass ratio of sodium bicarbonate to sodium carbonate is 2:

1.

10. The method for preparing a deodorant for dairy farms according to claim 8, characterized in that: The surfactant is one or both of sodium octadecyl sulfonate and sodium octadecyl sulfate.

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