Plant composite deodorant for improving animal breeding environment in pasture and preparation method thereof

Abstract

The invention relates to a plant composite deodorant for improving a pasture animal breeding environment. The plant composite deodorant is prepared from zinc diricinoleate, a surfactant, a green chelating agent trisodium methylglycine diacetate, a sansevieria trifasciata extract, a persimmon tannin extract, a pH regulator and water. The preparation method of the plant composite deodorant for improving the animal breeding environment of the pasture comprises five processes. Zinc diricinoleate has a good deodorization effect, tween-80 has good emulsification and dispersion effects, and cetearyl alcohol olivate is an emulsifier of a natural plant olive source; the green chelating agent methylglycine triacetic acid is used as a chelating agent, the solubility of zinc diricinoleate in an aqueous solution is increased, the sansevieria trifasciata extract and the persimmon tannin extract are plant-sourced effective deodorants and can effectively refresh air, the pH regulator can regulate the pH of the final product, and the stability of the product is improved. The deodorant has a good deodorization effect, can solve the problem of peculiar smell in a pasture animal breeding environment, and provides support for development of animal husbandry.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deodorant preparation methods, and particularly relates to a plant composite deodorant for improving the breeding environment of pasture animals and a preparation method thereof. BACKGROUND

[0002] With the development of scale and intensification of animal husbandry, the odor problem in the breeding environment of pasture animals is increasingly prominent. These odors not only have a negative impact on the health and production performance of breeding animals, such as reducing the appetite and immunity of animals, increasing the disease incidence, and thus affecting the quality and yield of livestock products such as meat, eggs and milk; but also seriously interfere with the living environment of surrounding residents, causing dissatisfaction and complaints of residents, and even leading to conflicts between breeding farms and surrounding communities. At the same time, environmental problems also come with it, one of which is air pollution, because a large amount of breeding products are produced, a large amount of malodorous substances such as ammonia, volatile fatty acids, methane, skatole and mercaptans are also discharged, which are mixed together and emit a nauseating smell. The main sources of these malodorous gases are the decomposition of manure, litter and surplus feed. Therefore, solving the problem of malodorous gas treatment and emission in the breeding industry is the key to the sustainable development of the breeding industry.

[0003] At present, in the research of zinc ricinoleate, it is internationally recognized that it has good deodorizing performance and can react with odor molecules to achieve the purpose of deodorization. Zinc ricinoleate usually presents as a nearly white powdery solid with a high melting point and is relatively stable at room temperature. Zinc ricinoleate molecules contain long-chain ricinoleic acid groups and zinc ions. The long-chain ricinoleic acid groups endow the molecules with certain lipophilicity, while the zinc ions affect the chemical activity of the molecules. However, its solubility in water is extremely low and almost insoluble in water. In order to exert its good deodorizing performance, it is necessary to solubilize zinc ricinoleate in aqueous solution, so good solubilization and dispersion technology is the key to realizing the deodorization of zinc ricinoleate. However, the existing technology has relatively few studies on the application of zinc ricinoleate in the deodorization of the breeding environment of pasture animals and the solubility problem in water. There is no practical product applied in the deodorization of the breeding industry, so it is of great practical significance to develop a deodorant based on zinc ricinoleate with high efficiency, environmental protection, safety and low cost. SUMMARY

[0004] In order to overcome the drawbacks of the existing breeding industry without a practical deodorant based on zinc ricinoleate as described in the background, the present application provides a plant composite deodorant for improving the breeding environment of pasture animals and a preparation method thereof based on zinc ricinoleate, which has good deodorizing effect under the joint action of related materials, can solve the odor problem in the breeding environment of pasture animals, and provides technical support for the sustainable development of animal husbandry.

[0005] The technical scheme adopted by the present application to solve its technical problems is: The plant composite deodorant for improving the breeding environment of pasture animals is composed of zinc ricinoleate, a surfactant, green chelating agent trisodium methyl glycine diacetate, Sansevieria trifasciata extract, persimmon tannin extract, a pH regulator and water, and the components are in a mass ratio of 2-5% of zinc ricinoleate, 5-10% of the surfactant, 1-3% of green chelating agent trisodium methyl glycine diacetate, 6-12% of Sansevieria trifasciata extract, 1-3% of persimmon tannin extract, 0.2-0.5% of the pH regulator, and the rest of water. The preparation method of the plant composite deodorant for improving the breeding environment of pasture animals comprises the following steps: S1: adding zinc ricinoleate powder and a surfactant in a reaction kettle with a stirring device and a temperature control system in a proportion, stirring for a period of time, then adding pure water, and continuing to stir for a period of time to uniformly disperse the zinc ricinoleate in the water; S2: after the raw materials in step S1 are cooled, green chelating agent trisodium methyl glycine diacetate is added, and the stirring is continued for a period of time to ensure that the surfactant fully plays a role and promotes the uniform dispersion and stability of the components; S3: Sansevieria trifasciata extract and persimmon tannin extract are sequentially added, the stirring speed is kept unchanged during the adding process, and the stirring is continued for a period of time after the adding is completed to fully mix the components; S4: the pH regulator is added to adjust the pH value of the deodorant to between 6.0 and 8.5 to ensure the stability of the deodorant during storage and use; and S5: after uniform stirring, the semi-finished product obtained in step S4 is filtered to remove existing insoluble impurities, and then is sub-packed to obtain the finished product of the plant composite deodorant.

[0006] Further, the surfactant comprises Tween-80 and cetyl stearyl alcohol olivoyl ester, the amount of the surfactant is 5-10%, and the ratio of Tween-80 to cetyl stearyl alcohol olivoyl ester is 5:1-10:1. Tween-80 plays a role in emulsification and dispersion, and cetyl stearyl alcohol olivoyl ester can form a stable liquid crystal structure to realize nanoscale solubilization of zinc ricinoleate and form a stable liquid crystal dispersion system in water in cooperation with green chelating agent trisodium methyl glycine diacetate.

[0007] Further, the zinc ricinoleate is prepared by combining zinc salt with acidified natural castor oil, high-purity raw materials with a castor oil acid content of more than 90% are selected, the castor oil is acidified, and then combined with zinc salt through alkalization and zinc salt reaction. The obtained zinc ricinoleate is a white powder and has good deodorizing effect.

[0008] Further, the Sansevieria extract uses naturally air-dried or low-temperature dried Sansevieria leaves as raw materials, the dried leaves are crushed into powder, and the powder is sieved through an 80-mesh sieve. The contact area between the solvent and the raw material is increased during the extraction process, and the extraction efficiency is improved. A polyhydric alcohol-water mixed solution is used as an extractant, and an ultrasonic-assisted extraction method is used for extraction. The extraction process is as follows: (1) The Sansevieria powder and the extractant are mixed according to a solid-liquid ratio of 1:15, and are placed in an ultrasonic extractor. During the ultrasonic extraction process, the cavitation effect of the ultrasonic waves can destroy the cell structure of Sansevieria, making it easier for active ingredients in the cells to be released into the extractant; (2) After the extraction is completed, the residue is removed by centrifugation to obtain a Sansevieria crude extract. To further improve the purity and stability of the extract, the crude extract is filtered through a filter membrane with a pore size of 0.01 microns at 0.5 MPa, and is concentrated to 1 / 3 of the original volume at room temperature and reduced pressure. The Sansevieria extract is obtained and is stored in a 4°C refrigerator for standby use.

[0009] Further, the green chelating agent trisodium methyl glycine diacetate can effectively chelate metal ions in various raw material solutions, and can increase the solubility of zinc ricinoleate in aqueous solution. The ph adjuster can adjust the ph value of the final product, and can improve the stability of the product.

[0010] Further, the persimmon tannin extract uses unripe green persimmon fruits as raw materials. After removing impurities, the pulp is crushed and placed in a freeze dryer for freeze-drying treatment to obtain dried persimmon pulp. The dried persimmon pulp is crushed into powder using a pulverizer and sieved through a 100-mesh sieve to obtain uniform particle size raw powder. A polyhydric alcohol-water mixed solution is used as an extractant, and an ultrasonic-assisted extraction method is used for extraction. The extraction process is as follows: (1) The persimmon powder and the extractant are mixed according to a solid-liquid ratio of 1:12, and are placed in a microwave extraction device. The heat effect and non-thermal effect of microwaves can accelerate the dissolution of tannin from persimmon cells, and improve the extraction efficiency; (2) After the extraction is completed, the residue is removed by filtration to obtain a persimmon tannin crude extract. The crude extract is concentrated by rotary evaporation, and the polyhydric alcohol and water are removed. Then, an appropriate amount of dilute alkali is added to partially oxidize the tannin and form an extractant with deodorizing effect; (3) The activated tannin obtained in step (2) is centrifuged to remove the precipitate, and the supernatant is taken. The PH is adjusted to 6.0-8.0 to obtain the persimmon tannin extract, which is stored at room temperature and sealed for standby use.

[0011] Further, in step S1, the stirring time is 20-30 min, the stirring shaft speed of the stirring device is 180-250 r / min, the temperature of the stirring device is 65-75°C, and the continuous stirring time is 20-30 min. Then, after adding pure water, the continuous stirring time is 10-20 min.

[0012] Further, in the step S2, the raw material is cooled to below 35-45℃, the stirring shaft of the stirring device rotates at 250r-350r / min, and the stirring time is 30min, so as to ensure that the surfactant fully plays a role.

[0013] Further, in the step S3, the stirring time is 15-25min, and the temperature control system controls the temperature in the reaction kettle at 30-35℃, so as to avoid that the temperature is too high or too low to affect the activity and stability of each component.

[0014] Compared with the prior art, the zinc ricinoleate has good deodorizing effect, the Tween-80 has good emulsifying and dispersing effect, the cetyl stearyl alcohol olive oil acid ester is a natural plant olive-derived emulsifier, can promote the formation of stable liquid crystal structure, the green chelating agent trisodium methyl glycine diacetate can effectively chelate metal ions in the solution, increase the solubility of the zinc ricinoleate in the aqueous solution, the Sanicula extract and the persimmon tannin extract are plant-derived effective deodorants, can effectively freshen the air, and the ph regulator can adjust the ph of the final product and improve the stability of the product. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 、 2 , 3, 4 are related proof materials of deodorization of the application.

[0016] Figure 5 is a preparation method flowchart of the plant composite deodorant for improving the breeding environment of the farm animals. DETAILED DESCRIPTION

[0017] The plant composite deodorant for improving the breeding environment of the farm animals is composed of zinc ricinoleate, a surfactant, green chelating agent trisodium methyl glycine diacetate, Sanicula extract, persimmon tannin extract, a ph regulator and water, and the components are in a mass ratio of 2-5% of the zinc ricinoleate, 5-10% of the surfactant (Tween-80 and cetyl stearyl alcohol olive oil acid ester), 1-3% of the green chelating agent trisodium methyl glycine diacetate (MGDA), 6-12% of the Sanicula extract, 1-3% of the persimmon tannin, 0.2-0.5% of the ph regulator, and the rest is water.

[0018] Figure 5As shown, the ph regulator used in the present application is used to adjust the ph value of the final product, which can promote the stability of the product. The green chelating agent trisodium methyl glycine diacetate can effectively chelate metal ions in the solution, and is used in the present application to increase the solubility of zinc ricinoleate in aqueous solution. Zinc ricinoleate is prepared by combining zinc salt with naturally derived castor oil after acidification, and high-purity raw materials with a ricinoleic acid content of more than 90% are used. The oil is extracted from plant castor seed raw materials, and after alkalization and zinc salt reaction, the white powder product zinc ricinoleate is obtained, which has good deodorizing effect. The surfactant is Tween-80 and cetyl stearyl alcohol olive oil acid ester. Tween-80 is a commonly used food-grade emulsifier with good emulsifying and dispersing effect; cetyl stearyl alcohol olive oil acid ester is a natural plant olive-derived emulsifier that can form a stable liquid crystal structure; the amount of surfactant (solubilizer) is 5-10%, and Tween-80 and cetyl stearyl alcohol olive oil acid ester are mixed in a ratio of 5:1-10:1 to form a stable liquid crystal dispersion system in water, which provides a good basis for the preparation of plant composite deodorant. In the preparation of plant composite deodorant, various components need to be uniformly mixed in the water phase, and the insolubility of zinc ricinoleate makes it difficult to disperse uniformly in the system, which can easily cause aggregation and reduce its deodorizing effect. In order to solve the water solubility problem of zinc ricinoleate, the commonly used surfactants were screened through orthogonal experimental design method, including Tween series (such as Tween-20, Tween-40, Tween-80, etc.), Span series (such as Span-20, Span-40, Span-80, etc.), natural olive-derived emulsifier cetyl stearyl alcohol olive oil acid ester and polyoxyethylene fatty acid ester, etc. The experiment shows that the Tween series solubilizer has good solubilizing effect on zinc ricinoleate, and Tween-80 performs particularly well. In the solution with Tween-80, zinc ricinoleate can be well dispersed, and the solution is relatively clear with almost no obvious precipitation. The addition of a small amount of cetyl stearyl alcohol olive oil acid ester can form a stable clear solution. Cetyl stearyl alcohol olive oil acid ester is a mild natural olive-derived emulsifier that can easily form a liquid crystal structure and improve the stability of the final deodorant solution.The effects of the amount of solubilizer, the order of addition, temperature, stirring speed and other process parameters on the solubilization of zinc ricinoleate were further studied to determine the optimal solubilization process conditions. The optimal solubilization process conditions were as follows: the amount of solubilizer was 5-10%, the solubilizer was a mixture of Tween-80 and cetylstearyl olivolate in a ratio of 5:1-10:1, zinc ricinoleate was first mixed with the solubilizer, the temperature was 70°C, the stirring speed was 200 r / min, and the stirring time was 25 min. Then, pure water was added. Under the above conditions, the solubility of zinc ricinoleate reached the maximum value, and a relatively stable dispersion system in water was formed, which provided a good foundation for the preparation of plant composite deodorant. Under the optimal solubilization process conditions, the particle size of zinc ricinoleate was significantly reduced, and the average particle size was reduced from a large size (tens of microns) before solubilization to a small range (several microns), indicating that the solubilizer effectively dispersed zinc ricinoleate in water to form smaller particles, increased the contact area with odor molecules, and was beneficial to improve the deodorizing effect.

[0019] Figure 5 As shown in the figure, the Sansevieria extract is prepared by using fresh and pest-free Sansevieria leaf blades as raw materials. The specific preparation process is as follows. (1) First, the leaf blades are washed clean with water to remove dust, impurities and microorganisms on the surface, so as to ensure the purity and safety of the extract. After washing, the leaf blades are naturally dried in a well-ventilated environment or dried at a low temperature, with the temperature controlled below 40°C to avoid damage to active ingredients caused by high temperature. The dried leaf blades are crushed into uniform powder by a crusher and sieved through an 80-mesh sieve to increase the contact area between the solvent and the raw material in the subsequent extraction process and improve the extraction efficiency. (2) A polyhydric alcohol-water mixed solution is used as an extraction agent, and an ultrasonic-assisted extraction method is used for extraction. Specifically, the Sansevieria powder is mixed with the extraction agent at a solid-liquid ratio of 1:15 (g / mL), and placed in an ultrasonic extractor. The ultrasonic power is set to 300 W, the temperature is set to 50°C, and the extraction time is set to 30 min. During the ultrasonic extraction process, the cavitation effect of the ultrasonic wave can destroy the cell structure of Sansevieria, making the active ingredients in the cells more easily released into the extraction agent. (3) After the extraction is completed, the residue is removed by centrifugal separation (at a speed of 4000 r / min for 10 min) to obtain a Sansevieria crude extract. To further improve the purity and stability of the extract, the crude extract is filtered through a filter membrane with a pore size of 0.01 microns at 0.5 mpa, and concentrated to 1 / 3 of the original volume at room temperature and reduced pressure to obtain the Sansevieria extract, which is stored in a 4°C refrigerator for standby use.

[0020] Figure 5As shown, the persimmon tannin extract used by the present application is prepared by selecting unripe persimmons with high tannin content as raw materials, and the specific preparation process is as follows. (1) First, wash the unripe persimmons, remove the skin, and remove the surface impurities and wax layer, then cut the flesh into small pieces and put them into a freeze-drying machine for freeze-drying treatment to sublimate and remove the water in the flesh, obtaining dried persimmon flesh. The dried persimmon flesh is crushed into powder with a pulverizer and sieved through a 100-mesh sieve to obtain raw material powder with uniform particle size. (2) An ethanol-water mixed solution is used as the extracting agent, and a microwave-assisted extraction method is used for extraction. The persimmon powder is mixed with the extracting agent at a solid-liquid ratio of 1:12 (g / mL), and then put into a microwave extraction device. The microwave power is set to 400W, the temperature is set to 55℃, and the extraction time is set to 20min. The heat effect and non-thermal effect of the microwave can accelerate the dissolution of tannin from the persimmon cells and improve the extraction efficiency; (3) After the extraction is completed, the residue is removed by filtration to obtain a crude persimmon tannin extract. The crude extract is concentrated by rotary evaporation to remove most of the ethanol and water, then an appropriate amount of dilute alkali solution is added to oxidize the tannin part and form a material with deodorizing effect. The activated tannin is removed by centrifugal separation (speed 5000r / min, time 15min), and the supernatant is taken. The PH is adjusted to 6.0-8.0 to obtain the persimmon tannin extract, which is stored at room temperature for standby use.

[0021] Figure 5As shown, the preparation method of the plant composite deodorant for improving the breeding environment of pasture animals is as follows, (1): first, add zinc ricinoleate powder into a reaction kettle with stirring device and temperature control system, slowly add surfactant (Tween-80, cetyl stearyl alcohol olive acid ester) according to the formula proportion, start stirring, the stirring speed is set to 200 r / min, the temperature is 70 DEG C, and the temperature is kept for 25 min, then add pure water, continue to stir for 15 min, so that the zinc ricinoleate is uniformly dispersed in water. (2): reduce the temperature to below 40 DEG C, add green chelating agent methyl glycine diacetic acid trisodium (MGDA), increase the stirring speed to 300 r / min, and prolong the stirring time to 30 min, so as to ensure that the surfactant fully plays a role and promotes the uniform dispersion and stability of each component, then add agave extract and persimmon tannin extract in turn, keep the stirring speed unchanged during the adding process, after the adding is completed, continue to stir for 20 min, so that each component is fully mixed; in the stirring process, the temperature in the reaction kettle is controlled at 30-35 DEG C through the temperature control system, so as to avoid that the temperature is too high or too low to affect the activity and stability of each component. (3): finally, add appropriate pH regulator to adjust the pH value of the deodorant to 6.0-8.5, so as to ensure the stability of the deodorant during storage and use, after uniform stirring, filter the prepared plant composite deodorant to remove possible insoluble impurities, then carry out sub-packaging, and the finished product plant composite deodorant is obtained.

[0022] The laboratory simulation test of the present application is carried out according to QB / T 2761 indoor air purification product purification effect determination method, and the performance of the plant composite deodorant in removing formaldehyde is tested by using static adsorption method, and the process is as follows. (1): build two closed glass containers as test devices, the volume of the container is 1.5 cubic meters (0.9*0.9*1.85), and 100g of plant composite deodorant sample is sprayed on three 1 square meter (0.8*1.25) base papers (which are required to be inert materials) for 3 times (a small spray pump with good atomization effect is used), and the first spray is dried before the second spray, and the second spray is dried before the third spray. (2): put the base paper without spraying the test liquid into container A as a control; put the just sprayed and not dried base paper into container B, then put the parallel formaldehyde release source into the test container, open the built-in fan for 1 min, and evenly disperse the formaldehyde in the formaldehyde release source in the test container, and then test the formaldehyde concentration in the two containers after standing for a period of time, and calculate the formaldehyde removal rate, as shown in Tables 1 and 2.

[0023] Table 1

[0024] Table 2 The application adopts dynamic adsorption method to test the removal performance of plant composite deodorant on hydrogen sulfide and ammonia, and the process is as follows. (1) A set of dynamic adsorption device is constructed, which mainly consists of hydrogen sulfide (ammonia) gas cylinder, gas flow meter, bubble absorption pipe and tail gas absorption device. The filling column is filled with glass wool and a certain amount of plant composite deodorant. The bubble absorption pipe is sealed at both ends and connected with the gas pipeline. (2) Adjust the valve of the hydrogen sulfide (ammonia) gas cylinder. The hydrogen sulfide (ammonia) gas is controlled by the gas flow meter to flow into the bubble absorption pipe at a flow rate of 1000 mL / min. The initial concentration of hydrogen sulfide (ammonia) gas is measured at the inlet of the bubble absorption pipe, and the concentration of hydrogen sulfide (ammonia) gas is measured at the outlet of the bubble absorption pipe. After a cycle, the concentration of hydrogen sulfide (ammonia) gas is measured. The removal rate of hydrogen sulfide (ammonia) is calculated, as shown in Tables 3 and 4.

[0025]

[0026] Table 3

[0027] Table 4 Combined with the Figure 1 , 2, 3, 4, The laboratory simulation test results show that the plant composite deodorant has good removal effect on formaldehyde, ammonia and hydrogen sulfide. In the static adsorption method test of formaldehyde removal rate, 10 min after spraying the plant composite deodorant, the formaldehyde removal rate reaches 40%, and with the extension of time, the removal rate gradually increases, reaching 85% at 60 min, and stabilizing at about 90% at 120 min; This shows that the zinc ricinoleate, agave extract, persimmon tannin and other components in the deodorant can quickly react or adsorb with formaldehyde molecules, and with the continuous reaction and adsorption, the formaldehyde removal effect is continuously enhanced. In the dynamic adsorption method test of ammonia removal rate, the initial stage (0-10 min), the ammonia removal rate is relatively high, more than 80%, ammonia is easily dissolved in water, and can quickly react with the effective components of the plant composite deodorant, with the continuous passage of ammonia gas through the bubble absorption pipe, the data rises slowly in the subsequent test, which may be related to the total amount of effective components in the plant composite deodorant, which has basically consumed the effective components. In the dynamic adsorption method test of hydrogen sulfide removal rate, the initial stage (0-30 min), the hydrogen sulfide removal rate is relatively low, about 50%, with the continuous passage of hydrogen sulfide gas through the bubble absorption pipe, the components in the plant composite deodorant fully contact and react with hydrogen sulfide, the removal rate reaches 70% at 60 min, and stabilizes at about 80% at 120 min. It shows that the plant composite deodorant can also effectively remove hydrogen sulfide in the dynamic environment, but the improvement of its removal effect is relatively slow compared with the improvement of formaldehyde removal rate, which may be due to the relatively stable chemical properties of hydrogen sulfide, and the reaction rate of the components in the plant composite deodorant is slow.

[0028] The present application selects a small-scale dairy farm in Yinchuan, Ningxia as the actual application test site. The farm raises more than 2000 dairy cows, with a breeding area of 40,000 square meters. The cowshed is divided into 30 areas, with a closed design, general ventilation conditions, high breeding density, and serious odor problems. Five test areas are selected in the farm, each with an area of about 100 square meters, labeled A, B, C, D, and E. Before using the deodorant, the initial concentration of odor gases in each test area is measured using a portable multi-gas detector (which can simultaneously detect the concentration of ammonia, hydrogen sulfide, volatile fatty acids, and other odor gases). The data is recorded. The farm's original mist system is used, and according to the program settings, the initial start time is 2-5 minutes, followed by 5-15 seconds every 5-10 minutes. The plant composite deodorant is evenly sprayed in the test area. After spraying, the concentration of odor gases is measured every 6 hours in different locations of each test area, and the monitoring continues for 3 days. During the test, the behavior and health status of the cows are recorded to observe whether the plant composite deodorant has any adverse effects on the cows. In addition, communication with the farm staff is conducted to understand their intuitive feelings and evaluations of the improvement of the breeding environment after using the deodorant. The results of the actual application test show that after using the plant composite deodorant, the concentration of odor gases in the breeding environment of the farm is significantly reduced. The ammonia concentration decreases by 80% within 6 hours after spraying the deodorant, the hydrogen sulfide concentration decreases by 65%, and the volatile fatty acid concentration decreases by 35%. Over time, the concentration of odor gases continues to decrease, with the ammonia concentration decreasing by 92% after 24 hours, the hydrogen sulfide concentration decreasing by 70%, and the volatile fatty acid concentration decreasing by 60%. Through further analysis of the test results, the technical personnel find that the formula of the deodorant, the preparation process, and the atomization effect of the spraying equipment have a significant impact on the deodorizing performance. The better the solubilizing effect of zinc ricinoleate, the higher the activity of the deodorant. The atomized particles with a diameter of 5-10 μm are light in mass and can float and spread in every gap in the deodorizing area for a long time, reacting more fully with odor molecules and achieving better deodorizing effect. The appropriate increase in the addition ratio of tiger tail orchid extract and persimmon tannin can enhance the adsorption and decomposition capacity of the deodorant to odor molecules, thereby improving the deodorizing effect. After using the plant composite deodorant continuously for 3 months in the dairy farm, the incidence of respiratory diseases in cows has decreased significantly from 10% to 3%. The feed intake and milk yield of the cows have also increased, with an average feed intake increase of 5% and a milk yield increase of 8%. The quality of the milk has also been improved, with a slight increase in milk protein and fat content. The dairy farmers indicate that after using the plant composite deodorant, the odor in the cowshed has been significantly reduced, the breeding environment has been greatly improved, the health status of the cows is good, and the increase in milk yield and milk quality has also increased economic benefits.The application of the plant composite deodorant effectively reduces the emission of peculiar smell gas in the farm, reduces the pollution to the surrounding atmospheric environment. The emission amount of peculiar smell gas such as ammonia and hydrogen sulfide is greatly reduced, the influence on the air quality is reduced, the living environment of the surrounding residents is protected, and the complaints and disputes of the residents caused by peculiar smell problems are reduced. At the same time, due to the improvement of the animal health condition, the use amount of veterinary drugs is reduced, the pollution risk of veterinary drug residues to the soil and water is reduced, which is beneficial to the protection of the ecological environment and the sustainable development. The plant composite deodorant adopts natural plant ingredients and is biodegradable, and will not cause secondary pollution to the environment, meets the environmental protection requirements, and has good environmental benefits.

[0029] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. It is obvious for those skilled in the art that the present application is limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0030] In addition, it should be understood that, although the present specification is described in terms of embodiments, the embodiments do not only contain one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in the embodiments can also be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A plant-based compound deodorizer for improving the animal husbandry environment in pastures, composed of zinc ricinoleate, surfactant, green chelating agent trisodium methylglycine diacetate, snake plant extract, persimmon tannin extract, pH adjuster, and water. The components, by mass ratio, are: zinc ricinoleate 2-5%, surfactant 5-10%, green chelating agent trisodium methylglycine diacetate 1-3%, snake plant extract 6-12%, persimmon tannin extract 1-3%, pH adjuster 0.2-0.5%, with the remainder being water. The preparation method of the plant-based compound deodorizer for improving the animal husbandry environment in pastures includes the following steps: S1: according to... In step S1, zinc ricinoleate powder and surfactant are added to a reactor equipped with a stirring device and a temperature control system. After stirring for a period of time, pure water is added, and stirring continues for a period of time to ensure that the zinc ricinoleate is evenly dispersed in the water. In step S2, after the raw materials in step S1 are cooled, the green chelating agent trisodium methylglycine diacetate is added, and stirring continues for a period of time to ensure that the surfactant plays its full role and promotes the even dispersion and stability of each component. In step S3, snake plant extract and persimmon tannin extract are added in sequence, keeping the stirring speed constant during the addition process. After the addition is completed, stirring continues for a period of time to ensure that the components are fully mixed. In step S4, a pH adjuster is added to adjust the pH value of the deodorant to between 6.0 and 8.5 to ensure the stability of the deodorant during storage and use. In step S5, after stirring evenly, the semi-finished product obtained in step S4 is filtered to remove any insoluble impurities, and then packaged to obtain the finished plant compound deodorant.

2. The plant-based compound deodorizer for improving the animal husbandry environment in pastures according to claim 1, characterized in that, The surfactants include Tween-80 and cetearyl oleate, with a surfactant dosage of 5-10%. The ratio of Tween-80 to cetearyl oleate is 5:1 to 10:

1. Tween-80 plays an emulsifying and dispersing role, while cetearyl oleate can form a stable liquid crystal structure, achieving nanoscale solubilization of zinc ricinoleate. Combined with the green chelating agent trisodium methylglycine diacetate, a stable liquid crystal dispersion system can be formed in water.

3. The plant-based compound deodorizer for improving the animal husbandry environment in pastures according to claim 1, characterized in that, Zinc ricinoleate is prepared by combining naturally sourced castor oil with zinc salts after acidification. It uses high-purity raw materials with a ricinoleic acid content of more than 90%. After acidification, the castor oil reacts with zinc salts through alkalization and purification. The resulting zinc ricinoleate is a white powder with good deodorizing effects.

4. The plant-based compound deodorizer for improving the animal husbandry environment in pastures according to claim 1, characterized in that, Snake plant extract was prepared by using snake plant leaves that were naturally air-dried or dried at low temperature as raw material. The dried leaves were crushed into powder and passed through an 80-mesh sieve to increase the contact area between the solvent and the raw material during the preparation and extraction process, thereby improving the extraction efficiency. A polyol-water mixed solution was used as the extractant, and the extraction was carried out by ultrasonic-assisted extraction. The extraction process is as follows: (1) Snake plant powder and extractant were mixed at a material-liquid ratio of 1:15 and placed in an ultrasonic extractor for extraction. During the ultrasonic extraction process, the cavitation effect of the ultrasonic waves could destroy the cell structure of snake plant, making it easier for the active ingredients in the cells to be released into the extractant. (2) After the extraction was completed, the residue was removed by centrifugation to obtain a crude snake plant extract. In order to further improve the purity and stability of the extract, the crude extract was filtered through a membrane with a pore size of 0.01 micrometers at 0.5 MPa and concentrated to 1 / 3 of the original volume under reduced pressure at room temperature to obtain snake plant extract. It was then stored in a refrigerator at 4°C for later use.

5. The plant-based compound deodorizer for improving the animal husbandry environment in pastures according to claim 1, characterized in that, The green chelating agent, trisodium methylglycine diacetate, can effectively chelate various metal ions in the raw material solution and increase the solubility of zinc ricinoleate in aqueous solution; the pH adjuster can adjust the pH value of the final product, thus contributing to product stability.

6. The plant-based compound deodorizer for improving the animal husbandry environment in pastures according to claim 1, characterized in that, Persimmon tannin extract uses unripe green persimmons as raw material. First, impurities are removed from the green persimmons, then the pulp is chopped and freeze-dried in a freeze dryer to obtain dried persimmon pulp. The dried persimmon pulp is then pulverized into powder using a grinder and passed through a 100-mesh filter. The raw material powder with uniform particle size was obtained by sieving. A polyol-water mixed solution was used as the extractant, and the extraction was carried out by ultrasonic-assisted extraction. The extraction process is as follows: (1): The persimmon powder and the extractant were mixed at a material-liquid ratio of 1:12 and placed in a microwave extraction device. The thermal and non-thermal effects of microwaves can accelerate the dissolution of tannins from persimmon cells and improve the extraction efficiency. (2): After extraction, the residue was removed by filtration to obtain a crude extract of persimmon tannins. The crude extract was concentrated by rotary evaporation to remove polyols and water. Then, an appropriate amount of dilute alkali solution was added to partially oxidize the tannins and form an extract with deodorizing effect. (3): The tannins activated in step (2) were centrifuged to remove the precipitate. The supernatant was taken and the pH was adjusted to 6.0-8.0 to obtain the persimmon tannin extract. It was then sealed and stored at room temperature for later use.

7. The method for preparing the plant-based compound deodorizer for improving the animal husbandry environment in pastures according to claim 1, characterized in that, In step S1, the stirring time is 20-30 minutes, the stirring shaft speed of the stirring device is 180-250 r / min, the temperature of the stirring device is 65-75℃, the stirring time is continued for 20-30 minutes, and then pure water is added, and the stirring time is continued for 10-20 minutes.

8. The method for preparing the plant-based compound deodorizer for improving the animal husbandry environment in pastures according to claim 1, characterized in that, In step S2, the raw material is cooled to below 35-45℃, the stirring shaft of the stirring device rotates at 250-350 r / min, and the stirring time is 30 min, to ensure that the surfactant can play its full role.

9. The method for preparing the plant-based compound deodorizer for improving the animal husbandry environment in pastures according to claim 1, characterized in that, In step S3, the stirring time is 15-25 minutes, and the temperature control system controls the temperature inside the reactor at 30-35℃ to avoid the effects of excessively high or low temperatures on the activity and stability of each component.

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