An acidic solid environmental conditioner for pig farms, its preparation method and application

Abstract

This invention relates to the field of livestock breeding technology, and more particularly to an acidic solid environmental conditioner for pig farms, its preparation method, and its application. By mass percentage, its raw materials consist of the following components: 80%-90% natural minerals, 4%-8% natural acidic extracts, 4%-8% natural organic acids, 0.5%-1% photocatalytic nanomaterials, and 1.5%-3.0% natural compound essential oils; and the sum of the mass percentages of each component is 100%. The advantages of this invention are that it contains natural mineral components and natural active extract components, wherein the natural mineral components are mainly calcium-based bentonite and nano-titanium dioxide; the natural active extract components are mainly phenyl lactic acid, citric acid, and plant extracts; it has antibacterial, dehumidifying, and deodorizing effects; it is safe and non-toxic when applied to pig farm environments, does not induce drug resistance, leaves no residue, is low in cost, has stable performance, and is easy to use. It can significantly reduce the number of bacteria in pig houses, reduce ammonia concentration and humidity, and plays an important role in maintaining a good breeding environment and reducing the incidence of disease in pig herds.

Description

Technical Field

[0001] This invention relates to the field of animal husbandry technology, and in particular to an acidic solid environmental conditioner for pig farms, its preparation method, and its application. Background Technology

[0002] With the accelerated scaling up and intensification of pig farming in my country, the continuous growth in pork consumption demand has significantly improved the industry's economic benefits. However, the high-density farming model has highlighted the challenges of centralized manure treatment. The fermentation of manure produces harmful gases such as hydrogen sulfide, ammonia nitrogen, and skatole, which, combined with the proliferation of pathogenic microorganisms, leads to the deterioration of the pigsty environment. This not only threatens the health of pigs but also triggers complaints from surrounding residents and poses ecological pollution risks, seriously hindering the sustainable development of the industry.

[0003] Chinese Patent Publication No. CN108097032A discloses a deodorizing agent for livestock farms and a method for improving livestock production performance using the same deodorizing agent. The deodorizing agent comprises the following components by weight percentage: propionic acid 1%-5%, malic acid 0.5%-8%, yeast 5%-20%, Bacillus 2%-15%, and lactic acid bacteria 10%-30%, with the balance being water. It contains multiple bacterial strains and chemical components, which can quickly eliminate harmful gases in livestock farms and prolong the duration of odor elimination. However, this patented deodorizing agent relies solely on microorganisms, and its deodorizing effect is unstable under their activity and influence; furthermore, it inhibits some bacteria through organic acid acidification, resulting in a low ammonia removal rate, and it cannot handle complex odor components such as hydrogen sulfide and skatole. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an acidic solid environmental conditioner for pig farms, its preparation method, and its application. It contains natural mineral components (calcium-based bentonite, nano-titanium dioxide) and natural active extract components (phenyllactic acid, citric acid, plant extract deodorizer). When applied to the environment of pig farms, it is safe and non-toxic, does not induce drug resistance, leaves no residue, is inexpensive, has stable performance, and is easy to use. It can significantly reduce the number of bacteria in pig houses, reduce ammonia concentration and humidity, and plays an important role in maintaining a good breeding environment and reducing the incidence of disease in pig herds.

[0005] This invention is achieved through the following technical solution: Firstly, it provides an acidic solid environmental conditioner for pig farms, whose raw materials, by mass percentage, consist of the following components: 80%-90% natural minerals, 4%-8% natural acidic extracts, 4%-8% natural organic acids, 0.5%-1% photocatalytic nanomaterials, and 1.5%-3.0% natural compound essential oils; and the sum of the mass percentages of each component is 100%. All components involved in this formulation process are natural product components, and compared with existing technologies, it has the effects of "antibacterial, dehumidifying, and deodorizing".

[0006] The antibacterial efficacy of this invention mainly utilizes the antibacterial effects of phenyllactic acid, citric acid, and nano-titanium dioxide in its components. The phenyllactic acid involved in this invention is a natural small-molecule organic acid produced by the metabolism of microorganisms such as lactic acid bacteria. It possesses multiple antibacterial mechanisms and broad-spectrum antibacterial properties, exhibiting significant inhibitory effects against pathogenic bacteria such as Listeria monocytogenes, Escherichia coli, and Staphylococcus aureus, as well as fungi such as Aspergillus niger and Aspergillus flavus. This substance exhibits superior pH and thermal stability compared to traditional antibacterial agents and shows application potential in the food, feed, and biopesticide fields. Nano-titanium dioxide is an antibacterial agent that permanently maintains its antibacterial effect, possessing characteristics such as safety and non-toxicity to humans, good thermal stability, and strong antibacterial ability. Compared to the Chinese patent announcement number CN108097032A, which involves the addition of microbial cells, the phenyllactic acid and citric acid in the formulation components of this invention are secondary metabolites of the microbial cells themselves, exhibiting stable physicochemical properties, outstanding antibacterial effects, and are not easily affected by external environmental interference, thus maintaining their antibacterial and deodorizing effects.

[0007] The dehumidification effect involved in this invention is mainly based on the highly efficient water absorption of calcium-based bentonite in the components. Bentonite is widely used as a desiccant in various products, and it has advantages such as large moisture absorption capacity, fast water absorption speed, low cost, and non-corrosiveness.

[0008] The deodorizing effect of this invention is mainly based on the synergistic effect of multiple components in the formula. First, phenyllactic acid and nano-titanium dioxide, which have highly efficient antibacterial activity, can inhibit the release of ammonia produced by microbial metabolism in animal feces at the source. At the same time, the low pH of citric acid, a natural organic acid, can maintain a certain acidic environment, reduce the reproduction of microorganisms in the environment, and thus control the presence of ammonia and other odors in the environment for a long time. Second, natural minerals have a strong adsorption capacity, which further adsorbs the odor produced by feces in the environment. Finally, the natural compound essential oil is composed of artemisia essential oil, peppermint essential oil and camphor seed essential oil, which has a certain natural plant fragrance, can improve the air and mask the odor in the environment.

[0009] Furthermore, the natural mineral comprises calcium-based bentonite, with the calcium-based bentonite accounting for 95%-99% of the total mass of the natural mineral. Bentonite is a non-metallic mineral with montmorillonite as its main mineral component. Its main chemical components are silicon dioxide, aluminum oxide, and water, and it also contains elements such as iron, magnesium, calcium, sodium, and potassium. The type of bentonite is determined by the type of interlayer cations; the interlayer cation is Na. + It was then called sodium-based bentonite; the interlayer cation was Ca. 2+ It is known as calcium-based bentonite. The calcium-based bentonite involved in this invention accounts for 95%-99% of the total mass of natural minerals, exhibits excellent adsorption and water absorption capacity, and can perform deodorization and dehumidification functions.

[0010] Furthermore, the mass ratio of the natural acidic extract to the natural organic acid is 1:0.5-2.5.

[0011] Furthermore, the natural acidic extract is selected from phenyllactic acid and its derivatives; the natural organic acid is selected from at least one of citric acid and malic acid. Phenylactic acid (PLA) is a natural small-molecule organic acid produced by the metabolism of microorganisms such as lactic acid bacteria. It is a novel biological preservative discovered in recent years that is natural, non-toxic, and has broad-spectrum antibacterial activity. Phenylactic acid has a wide range of applications, not only in the food industry to inhibit various pathogens, but also in the pharmaceutical and chemical industries. Phenylactic acid is acid-resistant and heat-resistant, maintaining high stability over a wide pH range. Its melting point is 121–125℃, and its activity remains intact even after 20 minutes at 120℃. Citric acid, with the molecular formula C6H8O7, is an important weak organic acid. It is a colorless, odorless crystal, easily soluble in water, and its solution is acidic. Citric acid is widely used as an acidity regulator (GB2760—2014), flavoring agent, and chelating agent.

[0012] Furthermore, the natural compound essential oil is composed of artemisia oil, peppermint oil, and camphor seed oil; the mass ratio of artemisia oil, peppermint oil, and camphor seed oil is 1:1:1. The artemisia oil, peppermint oil, and camphor seed oil are all obtained from natural plants through distillation extraction, possessing good volatility. The fragrant aroma of the essential oils themselves can improve the air freshness of the breeding environment to a certain extent.

[0013] Furthermore, the photocatalytic nanomaterial is nano-sized titanium dioxide, also known as nano-titanium dioxide, which appears as a white, loose powder. It possesses anti-lamination, antibacterial, self-cleaning, and anti-aging properties, and can be used in cosmetics, functional fibers, plastics, inks, coatings, paints, fine ceramics, and other fields.

[0014] Another method for preparing the above-mentioned acidic solid environmental conditioner for pig farms is provided, comprising the following steps:

[0015] Step S1: Prepare the raw materials according to the above proportions;

[0016] Step S2: After premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, add the natural compound essential oil and continue stirring until a uniform solid powder is formed.

[0017] Step S3: Sieve, fill and seal.

[0018] Furthermore, in step S2, the premixing speed is 20-50 rpm and the mixing time is 5-10 min.

[0019] Finally, an application of the above-mentioned acidic solid environmental conditioner for pig farms in a pig house environment is provided, including the following steps:

[0020] Step 1: Spread the improver evenly on the pigsty floor at a dosage of 50-100g per square meter;

[0021] Step 2: For areas with accumulated feces, spray an amendment at a ratio of 1% of the feces weight, and treat once a day;

[0022] In the first step, the improver reduces the ammonia concentration in the pigsty from ≥22mg / L to ≤1mg / L within 48 hours.

[0023] In the second step, the Oxford cup method was used, with a bacterial concentration of 1×10⁻⁶. 8 Under the condition of CFU / mL, the diameter of the inhibition zone of Escherichia coli is ≥20mm, the diameter of the inhibition zone of Staphylococcus aureus is ≥16mm, and the diameter of the inhibition zone of Aspergillus niger is ≥19mm.

[0024] Furthermore, the water absorption rate of the modifier is 118%-130%.

[0025] Beneficial effects:

[0026] Calcium-based bentonite, as a natural hygroscopic agent, can absorb 8-20 times its own volume in water, while simultaneously adsorbing odor molecules. Phenolic acid and citric acid inhibit bacterial metabolism through synergistic acidification (pH 2.5-3.5), and nano-titanium dioxide activates the calcium-based bentonite surface to generate reactive oxygen free radicals (·OH, O₂) under natural light. 2- This process achieves odor degradation and inactivation of pathogenic microorganisms; plant essential oils (artemisia, peppermint, camphor seed) neutralize odor molecules through organic acids and flavonoids, inhibiting NH3 generation, forming a four-dimensional synergistic mechanism of "hygroscopic-antibacterial-photocatalytic-deodorization".

[0027] The calcium-based bentonite (mineral adsorption), phenyllactic acid / citric acid (microbial fermentation), nano-titanium dioxide (photocatalytic material), and plant essential oils (plant distillation) involved in this invention contain no chemically synthesized components and meet GRAS (Generally Recognized As Safe) standards. Its mechanism of action avoids the risk of antibiotic and chemical disinfectant resistance, has no secondary pollution or toxic side effects, and the raw material cost is low (≤3.5 yuan / kg). The production process is simple (low-temperature mixing), making it suitable for the environmental protection and economic benefits requirements of large-scale farming scenarios.

[0028] This improver can significantly reduce ammonia concentration in pig houses (from ≥22mg / L to 0mg / L within 48 hours), inhibit pathogenic microorganisms (inhibition zone diameter ≥16mm, covering bacteria and fungi), and regulate humidity (water absorption rate 130%, relative humidity reduction 15%-20%). Compared with traditional chemical disinfectants and physical adsorption technology, it has the advantages of long-lasting effect (72-hour continuous action), broad spectrum (synergistic treatment of multiple pollutants), and safety (no residue, no corrosion). It can reduce the incidence of respiratory diseases in pig herds by more than 65% and reduce feed mold rate by 80%, providing an efficient and economical integrated environmental control solution for green farming. Attached Figure Description

[0029] Figure 1 This is a diagram illustrating the process of determining the ammonia concentration in feces using an ammonia detector.

[0030] Figure 2 To determine the antibacterial effect of acidic solid environmental modifiers on Escherichia coli using the Oxford cup method;

[0031] Figure 3 To determine the antibacterial effect of acidic solid environmental modifiers on Staphylococcus aureus using the Oxford cup method;

[0032] Figure 4 To determine the antibacterial effect of acidic solid environmental modifiers on Aspergillus niger using the Oxford cup method;

[0033] Figure 5 The actual deodorization effect of applying acidic solid environmental modifiers in a pig farm was studied. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. Experimental methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or as recommended by the manufacturer. Unless otherwise stated, all percentages, ratios, proportions, or parts are by weight.

[0036] Unless otherwise specified, the reagents and raw materials used in the embodiments and comparative examples of this invention are commercially available.

[0037] Example 1: Evaluation of the effect of acidic solid environmental conditioner on hog odor removal

[0038] Pig farms release large amounts of ammonia gas from manure. Ammonia is a strong irritant gas and a major source of odor in pig farms. It can irritate the pig's respiratory tract, damage the respiratory mucosal barrier, affect the pig's growth and development, reduce the body's resistance, and induce various respiratory diseases, posing a significant threat to pig production. Table 1 shows the relationship between olfactory odor intensity and ammonia concentration.

[0039] Table 1. Relationship between odor intensity and ammonia concentration

[0040]

[0041] As shown in Table 1 above, the ability of acidic solid environmental modifiers to degrade ammonia in pig manure is an important indicator for evaluating the odor removal effect.

[0042] In the preparation of the acidic solid environmental conditioner, three experimental groups were set up based on changes in the mass ratio of calcium-based bentonite to plant extract essential oils. The specific components are as follows:

[0043] Experimental group 1: 90% calcium-based bentonite, 4% phenyl lactic acid, 4% citric acid, 0.5% nano titanium dioxide, and 1.5% plant extract essential oils (0.5% artemisia oil, 0.5% peppermint oil, and 0.5% camphor seed oil);

[0044] Experimental Group 2: 85% calcium-based bentonite, 6% phenyl lactic acid, 6% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, and 0.75% camphor seed oil);

[0045] Experimental group 3: 80% calcium-based bentonite, 8% phenyl lactic acid, 8% citric acid, 1% nano titanium dioxide, and 3% plant extract essential oils (1% artemisia oil, 1% peppermint oil, and 1% camphor seed oil).

[0046] Step S1: Prepare the raw materials according to the above proportions;

[0047] Step S2: After premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, add the natural compound essential oil and continue stirring until a uniform solid powder is formed.

[0048] Step S3: Sieve, fill and seal.

[0049] Randomly selected pig manure (60-70% wet) was divided into a control group and an experimental group. 100g of manure was placed in sealed bottles for each group. The control group received no treatment. The experimental group was sprayed with an acidic solid environmental conditioner at a weight ratio of 100:1 (i.e., 1g of acidic solid environmental conditioner per 100g of manure). Each treatment was repeated three times. The experiment was conducted in a comfortable environment at room temperature (28℃) and relative humidity (approximately 50%). Methods for determining ammonia concentration (e.g., ...) Figure 1 As shown in the figure, ammonia gas was measured in real time at 0h, 6h, 12h, 24h, 36h, and 48h using a Hima T9500 detector. The average data and sensory evaluation results of the ammonia gas measurements are shown in Table 2.

[0050] Table 2 Evaluation of the effect of acidic solid environmental conditioner on pig odor removal

[0051]

[0052] As shown in the table above, compared with the blank control, spraying 1% acidic solid environmental conditioner significantly reduced the concentration of ammonia in feces, with a long-lasting ammonia removal effect. The ammonia concentration was significantly reduced within 6 hours and remained at 0 mg / L for 48 hours. Group comparisons showed that experimental group 3 had the highest content of antibacterial substances phenyllactic acid, citric acid, and nano-titanium dioxide, exhibiting better antibacterial effects. Simultaneously, the low pH maintained by the acidic extract was more persistent, resulting in ammonia concentration of 0 mg / L at 24 hours. Furthermore, the group had the highest content of natural plant extract essential oils, and the essential oil aroma was more persistent in sensory evaluation.

[0053] In summary, the evaluation of the effect of the acidic solid environmental modifier on removing odor from pig farms shows that the acidic solid environmental modifier of the present invention has a significant effect on removing odor from pig farms.

[0054] Example 2: Evaluation of the antibacterial effect of acidic solid environmental modifier

[0055] In the preparation process of the acidic solid environmental modifier, three experimental groups were set up based on the change in the mass ratio of the natural acidic extract to the natural organic acid. The specific components are as follows:

[0056] Experimental group 1: 85% calcium-based bentonite, 8% phenyl lactic acid, 4% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, and 0.75% camphor seed oil);

[0057] Experimental Group 2: 85% calcium-based bentonite, 6% phenyl lactic acid, 6% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, and 0.75% camphor seed oil);

[0058] Experimental group 3: 85% calcium-based bentonite, 4% phenyl lactic acid, 8% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, and 0.75% camphor seed oil).

[0059] Includes the following steps:

[0060] Step S1: Prepare the raw materials according to the above proportions;

[0061] Step S2: After premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, add the natural compound essential oil and continue stirring until a uniform solid powder is formed.

[0062] Step S3: Sieve, fill and seal.

[0063] *Escherichia coli* CMCC44102, *Staphylococcus aureus* GDMCC1.644, and *Aspergillus niger* CMCC98003 were selected as target pathogenic microorganisms for Gram-negative bacteria, Gram-positive bacteria, and fungi, respectively. Cultured *Escherichia coli*, *Staphylococcus aureus*, and *Aspergillus niger* were washed with sterile physiological saline to obtain bacterial colonies of 1–1.5 × 10⁻⁶. 8 CFU / mL bacterial suspension, shake well and set aside. Weigh 1.0 g of acidic solid environmental conditioner and dissolve it in 19 mL of sterile water to prepare a 20-fold dilution. Using the Oxford cup method, spread Escherichia coli and Staphylococcus aureus bacterial suspensions on NA medium (10.0 g / L peptone; 3.0 g / L beef meal; 5.0 g / L sodium chloride; 15.0 g / L agar) plates, and spread Aspergillus niger suspension on PDA medium (12.0 g / L potato extract; 20.0 g / L glucose; 15.0 g / L agar) plates. Add 200 μL of the diluted acidic solid environmental conditioner solution to each Oxford cup plate containing the target pathogenic microorganism. Incubate the bacteria at 37°C and the Aspergillus niger at 28°C. Observe the antibacterial effect after 24 hours. Each treatment has three replicates. The antibacterial effects of the acidic solid environmental conditioner are as follows: Figure 2-4 As shown in Table 3, the specific diameters of the inhibition zones are as follows.

[0064] Table 3 evaluates the antibacterial effect of acidic solid environmental modifiers using the Oxford cup method.

[0065]

[0066] As shown in Table 3 above, the acidic solid environmental modifier of the present invention has a good antibacterial effect on target pathogenic microorganisms such as Escherichia coli CMCC44102, Staphylococcus aureus GDMCC1.644, and Aspergillus niger CMCC98003, representing Gram-negative bacteria, Gram-positive bacteria, and fungi. Comparing the three experimental groups, experimental group 1 has the best antibacterial effect, mainly because the content of the antibacterial component phenyl lactic acid in this experimental group is the highest. As the content of phenyl lactic acid decreases, the antibacterial effect of experimental groups 2 and 3 also decreases, indicating that the antibacterial effect of the acidic solid environmental modifier of the present invention is significant.

[0067] Example 3: Evaluation of the water absorption effect of acidic solid environmental modifiers

[0068] In the preparation of the acidic solid environmental conditioner, two experimental groups were set up based on the different types of bentonite. The specific components are as follows:

[0069] Experimental group 1: 85% calcium-based bentonite, 6% phenyl lactic acid, 6% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, and 0.75% camphor seed oil);

[0070] Experimental Group 2: 85% sodium bentonite, 6% phenyl lactic acid, 6% citric acid, 0.75% nano titanium dioxide, 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, 0.75% camphor seed oil); including the following steps:

[0071] Step S1: Prepare the raw materials according to the above proportions;

[0072] Step S2: After premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, add the natural compound essential oil and continue stirring until a uniform solid powder is formed.

[0073] Step S3: Sieve, fill and seal.

[0074] The water absorption effect of acidic solid environmental modifiers was evaluated using the filter paper method. 55mm diameter circular filter paper was selected, folded, and placed against the funnel wall. The funnel was placed on a 100mL graduated cylinder. 5.0g of solid environmental modifier was weighed and poured into the funnel lined with filter paper. 20mL of ultrapure water was slowly added to the dry powder disinfectant, allowing the water to slowly pass through the solid environmental modifier and filter paper for approximately 10 minutes. The standard was determined by ensuring that no water droplets dripped from the filter paper for 2 minutes after all the water had been added. Each treatment was repeated three times. The ratio of water absorbed to the initial weight of the environmental modifier was used to evaluate the water absorption effect of the acidic solid environmental modifier.

[0075] Table 4 evaluates the water absorption effect of different bentonite-based acidic solid environmental conditioners prepared using the filter paper method.

[0076]

[0077] As shown in Table 4 above, the results show that the calcium-based bentonite used in the acidic solid environmental modifier formulation of the present invention has a better effect, with good water absorption and dehumidification effect. It can absorb up to 130% of its own weight in water, with an average water absorption rate of 124%, which is greater than the 107% water absorption effect of the calcium-based bentonite used.

[0078] Example 4: Evaluation of pH stability effect of acidic solid environmental modifier

[0079] In the preparation process of the acidic solid environmental modifier, three experimental groups were set up based on the change in the mass ratio of the natural acidic extract to the natural organic acid. The specific components are as follows:

[0080] Experimental group 1: 85% calcium-based bentonite, 8% phenyl lactic acid, 4% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, and 0.75% camphor seed oil);

[0081] Experimental Group 2: 85% calcium-based bentonite, 6% phenyl lactic acid, 6% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, and 0.75% camphor seed oil);

[0082] Experimental group 3: 85% calcium-based bentonite, 4% phenyl lactic acid, 8% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, and 0.75% camphor seed oil).

[0083] Includes the following steps:

[0084] Step S1: Prepare the raw materials according to the above proportions;

[0085] Step S2: After premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, add the natural compound essential oil and continue stirring until a uniform solid powder is formed.

[0086] Step S3: Sieve, fill and seal.

[0087] After each prepared experimental group was left to stand at room temperature for 1-7 days, a small amount of sample was dissolved in deionized water at a dilution ratio of 1:20, stirred thoroughly, and left to stand. Then, the pH of each experimental group was measured using a pH meter.

[0088] Table 5. Evaluation of pH stability effect of acidic solid environmental modifiers

[0089]

[0090] As shown in Table 5 above, the results show that experimental group 1, with the highest content of phenyllactic acid, initially had a lower pH; while experimental group 3, with the highest content of citric acid, could maintain a more stable low pH state for 7 days. In summary, the acidic solid environmental modifier prepared in this invention can maintain a stable low pH state for 7 days, thereby persistently inhibiting the growth and reproduction of pathogenic microorganisms in the environment.

[0091] Example 5: Evaluation of the practical application effect of acidic solid environmental conditioner in a pig farm

[0092] The specific components of the acidic solid environmental modifier are: 85% calcium-based bentonite, 6% phenyl lactic acid, 6% citric acid, 0.75% nano titanium dioxide, and 2.25% plant extract essential oils (0.75% artemisia oil, 0.75% peppermint oil, and 0.75% camphor seed oil).

[0093] Includes the following steps:

[0094] Step S1: Prepare the raw materials according to the above proportions;

[0095] Step S2: After premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, add the natural compound essential oil and continue stirring until a uniform solid powder is formed.

[0096] Step S3: Sieve, fill and seal.

[0097] The actual application effect was evaluated at a local pig farm. The improver was evenly spread on the pigsty floor at a dosage of 100g per square meter. The main evaluations were the deodorization effect, sensory evaluation, and air humidity evaluation during use. The control group used a commercially available acidic environment improver for livestock farming, and its dosage was in accordance with the reference instructions.

[0098] Table 6 Evaluation of the practical application effect of acidic solid environmental conditioner in a pig farm

[0099]

[0100] As shown in Table 6, the results show that the acidic solid environmental conditioner of the present invention reduced the ammonia concentration in the pig house from ≥22mg / L to ≤1mg / L within 48h. Compared with the control group, it has a longer-lasting essential oil aroma in terms of sensory evaluation, and can control the air humidity at a comfortable level of 65-75%. This fully demonstrates that the acidic solid environmental conditioner of the present invention has obvious practical application effects in a pig farm and can meet the actual production application requirements.

[0101] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An acidic solid environmental conditioner for pig farms, characterized in that, By weight percentage, its raw materials consist of the following components: 80%-90% natural minerals, 4%-8% natural acidic extracts, 4%-8% natural organic acids, 0.5%-1% photocatalytic nanomaterials, and 1.5%-3.0% natural compound essential oils; and the sum of the weight percentages of each component is 100%; among which, The natural minerals include calcium-based bentonite, and the amount of calcium-based bentonite added accounts for 95%-99% of the total mass of the natural minerals. The mass ratio of the natural acidic extract to the natural organic acid is 1:1; The natural compound essential oil is composed of mugwort essential oil, peppermint essential oil and camphor seed essential oil; the mass ratio of mugwort essential oil, peppermint essential oil and camphor seed essential oil is 1:1:

1.

2. The acidic solid environmental conditioner for pig farms according to claim 1, characterized in that, The natural acidic extract is selected from phenyllactic acid and its derivatives; the natural organic acid is selected from at least one of citric acid and malic acid.

3. A method for preparing the acidic solid environmental conditioner for pig farms according to any one of claims 1-2, characterized in that, Includes the following steps: Step S1: Prepare the raw materials according to the above proportions; Step S2: After premixing the natural minerals, natural acidic extracts, natural organic acids, and photocatalytic nanomaterials, add the natural compound essential oil and continue stirring until a uniform solid powder is formed. Step S3: Sieve, fill and seal.

4. The method for preparing the acidic solid environmental conditioner for pig farms according to claim 3, characterized in that, In step S2, the premixing speed is 20-50 rpm and the mixing time is 5-10 min.

5. An application of the acidic solid environmental conditioner for pig farms according to any one of claims 1-2 in a pigsty environment, characterized in that, Includes the following steps: Step 1: Spread the improver evenly on the pigsty floor at a dosage of 50-100g per square meter; Step 2: For areas with accumulated feces, spray an amendment at a ratio of 1% of the feces weight, and treat once a day; In the first step, the improver reduces the ammonia concentration in the pigsty from ≥22mg / L to ≤5mg / L within 48 hours. In the second step, the Oxford cup method was used. Under the condition of bacterial concentration of 1×10⁸ CFU / mL, the diameter of the inhibition zone of Escherichia coli was ≥20 mm, the diameter of the inhibition zone of Staphylococcus aureus was ≥16 mm, and the diameter of the inhibition zone of Aspergillus niger was ≥19 mm.

6. The application according to claim 5, characterized in that, The water absorption rate of the modifier is 118%-130%.

Images