A formula milk powder for piglets and a method for preparing the same

Abstract

The application discloses a formula milk powder for piglets, which contains raw cow milk, whey powder, whey protein concentrate powder, casein, nutritional fortifier, oligosaccharide, compound mineral, compound amino acid, compound vitamin and probiotic bacteria. The formula milk powder for piglets is obtained by mixing the raw cow milk, the whey powder, the whey protein concentrate powder, the casein and the nutritional fortifier, adding the compound mineral, the compound amino acid and the compound vitamin, filtering, homogenizing, sterilizing and concentrating, spray drying, fluidized bed drying and adding the probiotic bacteria. The formula milk powder for piglets prepared by the application is rich in probiotic bacteria, nutritional fortifier, vitamin, amino acid, mineral and other nutrients, can meet the nutritional needs of the piglets for rapid growth, and can reduce the probability of digestive disorders, diarrhea and death of the piglets and promote the healthy growth of the piglets.

Description

Technical Field

[0001] This invention relates to the field of milk powder processing technology, and in particular to a formula milk powder for piglets and its preparation method. Background Technology

[0002] Piglets are piglets in the suckling stage, which is a crucial stage in a pig's growth and development. Their digestive organs are not yet fully developed, they have insufficient gastric acid secretion and low digestive enzyme activity, and their temperature regulation center is not yet established. Newborn piglets, due to their lack of a well-developed thermoregulatory center, sparse hair, and lack of subcutaneous fat, have weak immunity and poor resistance to pathogens and adverse environments, making them susceptible to various diseases such as diarrhea. Therefore, the suckling stage is a relatively high mortality period for piglets in the breeding process.

[0003] Currently, there are many shortcomings in piglet feed on the market. Some feeds are nutritionally unbalanced and cannot meet the nutritional needs of piglets growing rapidly. The feed ingredients are not easy to digest, leading to indigestion and frequent diarrhea in piglets, which affects their growth, development and health. The feed lacks immune-enhancing ingredients and cannot effectively improve the immunity of piglets, making them susceptible to pathogens.

[0004] Therefore, developing a nutritionally complete, easily digestible, and immune-boosting formula milk powder for piglets is of great practical significance. Summary of the Invention

[0005] The purpose of this invention is to provide formula milk powder for piglets to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing piglet formula milk powder, comprising the following preparation steps: S1. Preparation of basic milk liquid: Add 85-90 parts by weight of raw milk, 6-10 parts by weight of whey powder, 3-5 parts by weight of whey protein concentrate, 2-5 parts by weight of casein, 4-7 parts by weight of nutritional fortifier, and 2-4 parts by weight of oligosaccharide to a mixing tank, and stir at 350-400 rpm for 25-30 minutes at 40-50℃ to obtain basic milk liquid.

[0007] S2. Preparation of mixed emulsion: The basic milk obtained in S1 is fed into a vacuum mixer, and then 25-30 parts by weight of compound mineral solution is added and stirred for 3-4 minutes; then 15-20 parts by weight of compound amino acid solution is added and stirred for 3-4 minutes; finally, 8-10 parts by weight of compound vitamins are added and stirred for 3-4 minutes to obtain mixed emulsion.

[0008] S3. Filtration and homogenization: The mixed emulsion obtained in S2 is filtered through a double filter with a filter diameter of 50 μm and then transferred to a homogenizer for homogenization.

[0009] S4. Sterilization and Concentration: The homogenized mixed emulsion is sterilized using steam injection instantaneous sterilization technology, and then fed into a falling film evaporator for concentration before being discharged to obtain concentrated milk.

[0010] S5. Spray drying: The concentrated milk obtained in S4 is transported to a spray drying tower for drying to obtain spray-dried milk powder.

[0011] S6. Fluidized bed drying: The spray-dried milk powder is conveyed to a fluidized bed for drying, so that the moisture content of the milk powder is ≤4.0%.

[0012] S7. Add probiotic powder: Weigh 80-90 parts by weight of fluidized bed dried milk powder and 0.02-0.05 parts by weight of probiotic powder and mix them evenly under sterile conditions.

[0013] S8. Testing and Packaging: After testing the milk powder with added probiotics for metal foreign objects, it is packaged in a sterile environment to obtain piglet formula milk powder.

[0014] As a preferred embodiment of the present invention, the nutrient fortifier is obtained by mixing the following components: 10-15 parts by weight of inulin, 4-8 parts by weight of astragalus polysaccharide, 2-5 parts by weight of disodium 5'-inosinate, and 0.8-1.2 parts by weight of β-nicotinamide mononucleotide.

[0015] As a preferred embodiment of the present invention, the oligosaccharide is composed of mannan oligosaccharide and fructooligosaccharide in a mass ratio of 1 to 2:1.

[0016] As a preferred technical solution of the present invention, the composite mineral solution is prepared by the following method: the composite minerals and purified water are stirred and mixed in a mixing tank at a temperature of 40-50°C in a certain proportion to fully dissolve the composite minerals and obtain the composite mineral solution, wherein the mass ratio of purified water to composite minerals is 7-8:1.

[0017] As a preferred technical solution of the present invention, the composite amino acid solution is prepared by the following method: the composite amino acid and purified water are stirred and mixed in a mixing tank at a temperature of 40-50°C in a certain proportion to fully dissolve the composite amino acid and obtain the composite amino acid solution, wherein the mass ratio of purified water to composite trace elements is 7-8:1.

[0018] As a preferred technical solution of the present invention, the compound vitamin solution is prepared by the following method: compound vitamins and purified water are stirred and mixed in a mixing tank at a temperature of 40-50°C in a certain proportion to fully dissolve the compound vitamins and obtain a compound vitamin solution, wherein the mass ratio of purified water to compound vitamins is 7-8:1.

[0019] As a preferred embodiment of the present invention, the vacuum mixer in S2 has a vacuum degree of -0.09 to -0.08 MPa, a rotation speed of 150 to 200 rpm, and a temperature of 40 to 50°C.

[0020] As a preferred embodiment of the present invention, the homogenizer in S3 has a pressure of 18-20 MPa, a rotation speed of 500-600 rpm, and a homogenization time of 10-15 min.

[0021] As a preferred embodiment of the present invention, the sterilization temperature of the steam injection instantaneous sterilization in step S4 is 100–105°C and the steam flow rate is 20–25 m³ / h. 3 / h, vacuum degree -90~-85kPa, steam pressure 0.8~1.0MPa, sterilization time 60~70s.

[0022] As a preferred embodiment of the present invention, the falling film evaporator in S4 is composed of a first-effect evaporator, a second-effect evaporator, a third-effect evaporator, and a fourth-effect evaporator connected in series. The temperature of the first-effect evaporator is 65-75°C, the temperature of the second-effect evaporator is 60-65°C, the temperature of the third-effect evaporator is 55-60°C, and the temperature of the fourth-effect evaporator is 50-55°C.

[0023] As a preferred embodiment of the present invention, the density of the material discharged in step S4 is 1100–1200 kg / m³. 3 The mass concentration of the discharged material is 40-50%.

[0024] As a preferred embodiment of the present invention, the inlet air temperature of the spray drying tower in S5 is 160-180°C, the outlet air temperature is 75-80°C, and the negative pressure inside the drying tower is -25 to -10 Pa.

[0025] As a preferred embodiment of the present invention, in S6, the temperature of the first stage of the fluidized bed is 45-50°C, the time is 10-15 min, and the fluidization velocity is 0.2-0.5 m / s; the temperature of the second stage of the fluidized bed is 35-40°C, the time is 8-10 min, and the fluidization velocity is 0.2-0.5 m / s.

[0026] As a preferred embodiment of the present invention, the probiotic powder is composed of Lactobacillus powder, Bacillus subtilis powder, and Bifidobacterium powder in a mass ratio of 1-2:1:1, wherein the viable count of each of the Lactobacillus powder, Bacillus subtilis powder, and Bifidobacterium powder is ≥1.0×10⁻⁶. 10 CFU / g.

[0027] As a preferred embodiment of the present invention, the composite mineral is obtained by mixing the following components: 20-25 parts by weight of calcium carbonate, 7-10 parts by weight of calcium hydrogen phosphate, 6-8 parts by weight of ferrous sulfate, 4-6 parts by weight of zinc gluconate, and 1.0-1.2 parts by weight of sodium selenite.

[0028] As a preferred embodiment of the present invention, the composite amino acid is obtained by mixing the following components: 15-20 parts by weight of lysine, 10-12 parts by weight of methionine, 7-10 parts by weight of threonine, and 4-6 parts by weight of tryptophan.

[0029] As a preferred embodiment of the present invention, the compound vitamin is obtained by mixing the following components: 15-18 parts by weight of vitamin A, 10-12 parts by weight of vitamin D3, 8-10 parts by weight of vitamin C, 7-9 parts by weight of vitamin E, 5-7 parts by weight of vitamin B1, 3-5 parts by weight of vitamin B2, 1-3 parts by weight of vitamin B3, 1.5-2.0 parts by weight of vitamin B5, 0.8-1.2 parts by weight of vitamin B6, and 0.8-1.0 parts by weight of vitamin B1. 12 0.5 to 1.0 parts by weight of vitamin K3.

[0030] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention incorporates a probiotic powder composed of Lactobacillus powder, Bacillus subtilis powder, and Bifidobacterium powder into piglet formula. Lactobacillus and Bifidobacterium can competitively inhibit the colonization of harmful bacteria such as Escherichia coli and Salmonella, reducing intestinal endotoxin levels, maintaining intestinal microecological balance, and reducing intestinal infections. Bacillus subtilis secretes digestive enzymes such as amylase and protease, assisting piglets in digesting large molecules such as starch and protein in the formula, thus improving nutrient utilization. After weaning, piglets are prone to intestinal flora imbalance, leading to decreased digestive function and diarrhea. Probiotics can stabilize the flora structure, reduce the damage to the intestines caused by weaning stress, help piglets transition smoothly, and promote the proliferation of intestinal epithelial cells, preventing the invasion of harmful substances and pathogens, reducing the risk of diarrhea, and improving the survival rate of piglets. The oligosaccharides composed of mannan oligosaccharides and fructooligosaccharides added in this invention can promote the proliferation of probiotics, which is beneficial to the growth and reproduction of probiotics, inhibits the growth of harmful bacteria such as Escherichia coli, and reduces the production of intestinal toxins.

[0031] 2. Piglets have underdeveloped digestive systems and low utilization rates of plant protein. This invention adds compound minerals, compound vitamins, and compound amino acids to piglet formula milk powder, which can comprehensively supplement nutrition, promote the growth and development of piglets, enhance immunity, and effectively supplement essential amino acids in milk powder by adding lysine, methionine, threonine, and tryptophan, thereby improving nutritional value, significantly enhancing the health of piglets, strengthening their immunity, reducing pathogen invasion, and increasing the survival rate of piglets.

[0032] 3. This invention incorporates a nutritional fortifier composed of inulin, astragalus polysaccharide, disodium 5'-inosinate, and β-nicotinamide mononucleotide into piglet formula milk powder. Inulin can be fermented by beneficial bacteria such as lactobacillus and bifidobacteria in the intestine to produce short-chain fatty acids such as acetic acid and butyric acid, thereby lowering the intestinal pH, inhibiting the growth of harmful bacteria such as Escherichia coli, and promoting the proliferation of beneficial bacteria to form an intestinal biofilm barrier. Simultaneously, inulin can reduce the expression of pro-inflammatory cytokines in the intestine, reduce inflammatory responses, enhance immune function, and improve the survival rate of piglets. Astragalus polysaccharide can promote antibody production, increase the activity of serum immunoglobulins, enhance immune function, reduce the incidence of disease in piglets, and improve their survival rate. Disodium 5'-inosinate can significantly enhance the umami flavor of the milk powder and increase feed intake in piglets, especially suitable for piglets with decreased appetite after weaning. β-nicotinamide mononucleotide can protect the integrity of the intestinal mucosa, reduce the incidence of diarrhea, and promote intestinal health through its antioxidant and anti-inflammatory effects. Attached Figure Description

[0033] Figure 1 This is a flowchart illustrating the preparation process of the piglet formula milk powder of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figure 1 As shown, a method for preparing piglet formula milk powder includes the following preparation steps: S1. Preparation of Base Milk Liquid: Raw milk, whey powder, whey protein concentrate, casein, fortifier, and oligosaccharides are added to a mixing tank and stirred at 350-400 rpm for 25-30 minutes at 40-50℃ to obtain base milk liquid. S2. Preparation of Mixed Emulsion: The base milk liquid is transferred to a vacuum mixer, then a compound mineral solution is added and stirred for 3-4 minutes; a compound amino acid solution is added and stirred for 3-4 minutes; finally, a compound vitamin solution is added and stirred for 3-4 minutes to obtain mixed emulsion. S3. Filtration and Homogenization: The mixed emulsion is filtered through a double filter with a 50μm diameter and then homogenized in a homogenizer. S4. Sterilization and Concentration: The homogenized mixed emulsion is sterilized using steam injection instantaneous sterilization technology, and then fed into a falling film evaporator for concentration before being discharged to obtain concentrated milk. S5. Spray Drying: The concentrated milk is sent to a spray drying tower for drying to obtain spray-dried milk powder. S6. Fluidized Bed Drying: The spray-dried milk powder is conveyed to a fluidized bed for drying, ensuring the moisture content of the milk powder is ≤4.0%. S7. Addition of Probiotic Powder: 80-90 parts by weight of the fluidized bed-dried milk powder and 0.02-0.05 parts by weight of probiotic powder are weighed and mixed evenly under aseptic conditions. S8. Testing and Packaging: After metal foreign object detection, the probiotic-added milk powder is packaged under aseptic conditions to obtain piglet formula milk powder.

[0036] All raw materials used in this invention are commercially available food ingredients.

[0037] Example 1: A method for preparing piglet formula milk powder includes the following preparation steps: S1. Preparation of basic milk liquid: 90 parts by weight of raw milk, 10 parts by weight of whey powder, 5 parts by weight of whey protein concentrate, 5 parts by weight of casein, 7 parts by weight of nutritional fortifier (obtained by mixing the following components: 15 parts by weight of inulin, 8 parts by weight of astragalus polysaccharide, 5 parts by weight of disodium 5'-inosinate, 1.2 parts by weight of β-nicotinamide mononucleotide), and 4 parts by weight of oligosaccharide (composed of mannan oligosaccharide and fructooligosaccharide in a mass ratio of 2:1) are added to the mixing tank and stirred at 400 rpm for 25 minutes at 50°C to obtain basic milk liquid.

[0038] S2. Preparation of mixed emulsion: (1) Preparation of compound mineral solution: Mix the compound minerals and purified water in a mixing tank at a temperature of 50°C. Mix the compound minerals (the compound minerals are obtained by mixing the following components: 25 parts by weight of calcium carbonate, 10 parts by weight of calcium hydrogen phosphate, 8 parts by weight of ferrous sulfate, 6 parts by weight of zinc gluconate, and 1.2 parts by weight of sodium selenite) and purified water in a mixing tank at a temperature of 50°C to fully dissolve the compound minerals and obtain a compound mineral solution. The mass ratio of purified water to compound minerals is 8:1. (2) Preparation of compound amino acid solution: Mix the compound amino acids (the compound amino acids are obtained by mixing the following components: 20 parts by weight of lysine, 12 parts by weight of sodium selenite, and 1.2 parts by weight of sodium selenite) in a mixing tank at a temperature of 50°C to fully dissolve the compound minerals and obtain a compound mineral solution. The mass ratio of purified water to compound minerals is 8:1. (3) The compound vitamin solution is prepared by mixing the compound vitamins (18 parts by weight of methionine, 10 parts by weight of threonine, 6 parts by weight of tryptophan) and purified water in a mixing tank at a temperature of 50°C to fully dissolve the compound amino acids and obtain a compound amino acid solution. The mass ratio of purified water to compound trace elements is 8:1. The compound vitamin solution is prepared by mixing the following components: ~18 parts by weight of vitamin A, 12 parts by weight of vitamin D3, 10 parts by weight of vitamin C, 9 parts by weight of vitamin E, 7 parts by weight of vitamin B1, 5 parts by weight of vitamin B2, 3 parts by weight of vitamin B3, 2.0 parts by weight of vitamin B5, 1.2 parts by weight of vitamin B6, 1.0 parts by weight of vitamin B6. 12 1.0 parts by weight of vitamin K3 and purified water are mixed in a mixing tank at a temperature of 50°C to fully dissolve the complex vitamins and obtain a complex vitamin solution. The mass ratio of purified water to complex vitamins is 8:1. (4) Preparation of mixed emulsion: The basic milk obtained in S1 is transported to a vacuum mixer with a vacuum degree of -0.08MPa, a rotation speed of 200rpm and a temperature of 50°C. Then, 30 parts by weight of complex mineral solution are added and mixed for 3 minutes. Then, 20 parts by weight of complex amino acid solution are added and mixed for 3 minutes. Finally, 10 parts by weight of complex vitamins are added and mixed for 3 minutes to obtain a mixed emulsion.

[0039] S3. Filtration and homogenization: The mixed emulsion obtained in S2 is filtered through a double filter with a filter diameter of 50 μm and then homogenized in a homogenizer with a pressure of 20 MPa and a speed of 600 rpm for 10 min.

[0040] S4. Sterilization and Concentration: The homogenized mixed emulsion is sterilized using steam injection instantaneous sterilization technology, wherein the sterilization temperature of steam injection instantaneous sterilization is 105℃ and the steam flow rate is 25m³ / h. 3The process involves a vacuum level of -90 kPa, a steam pressure of 1.0 MPa, and a sterilization time of 60 seconds. The sterilized emulsion is then fed into a falling film evaporator for concentration before being discharged as concentrated milk. The falling film evaporator consists of four evaporators connected in series: a first-effect evaporator (75℃), a second-effect evaporator (65℃), a third-effect evaporator (60℃), and a fourth-effect evaporator (55℃). The density of the discharged milk is 1100 kg / m³. 3 The mass concentration of the discharged material is 40%.

[0041] S5. Spray drying: The concentrated milk obtained in S4 is transported to a spray drying tower for drying to obtain spray-dried milk powder. The inlet air temperature of the spray drying tower is 180℃, the outlet air temperature is 80℃, and the negative pressure inside the drying tower is -10Pa.

[0042] S6. Fluidized bed drying: The spray-dried milk powder is conveyed to a fluidized bed for drying, so that the moisture content of the milk powder is ≤4.0%. The temperature of the first stage of the fluidized bed is 50℃, the time is 10min, and the fluidization velocity is 0.5m / s; the temperature of the second stage of the fluidized bed is 40℃, the time is 8min, and the fluidization velocity is 0.5m / s.

[0043] S7. Add probiotic powder: Weigh 90 parts by weight of fluidized bed dried milk powder and 0.05 parts by weight of probiotic powder (the probiotic powder is composed of Lactobacillus powder, Bacillus subtilis powder, and Bifidobacterium powder in a mass ratio of 2:1:1, with a live bacteria count ≥1.0×10⁻⁶). 10 Mix (CFU / g) thoroughly under sterile conditions.

[0044] S8. Testing and Packaging: After testing the milk powder with added probiotics for metal foreign objects, it is packaged in a sterile environment to obtain piglet formula milk powder.

[0045] Example 2: A method for preparing piglet formula milk powder includes the following preparation steps: S1. Preparation of basic milk liquid: 85 parts by weight of raw milk, 6 parts by weight of whey powder, 3 parts by weight of whey protein concentrate, 2 parts by weight of casein, 4 parts by weight of nutritional fortifier (obtained by mixing the following components: 10 parts by weight of inulin, 4 parts by weight of astragalus polysaccharide, 2 parts by weight of disodium 5'-inosinate, 0.8 parts by weight of β-nicotinamide mononucleotide), and 2 parts by weight of oligosaccharide (composed of mannan oligosaccharide and fructooligosaccharide in a mass ratio of 1:1) are added to the mixing tank and stirred at 350 rpm for 30 min at 40°C to obtain basic milk liquid.

[0046] S2. Preparation of mixed emulsion: (1) Preparation of compound mineral solution: Mix the compound minerals and purified water in a mixing tank at a temperature of 40°C. Mix the compound minerals (the compound minerals are obtained by mixing the following components: 20 parts by weight of calcium carbonate, 7 parts by weight of calcium hydrogen phosphate, 6 parts by weight of ferrous sulfate, 4 parts by weight of zinc gluconate, and 1.0 part by weight of sodium selenite) and purified water in a mixing tank at a temperature of 40°C to fully dissolve the compound minerals and obtain a compound mineral solution. The mass ratio of purified water to compound minerals is 7:1. (2) Preparation of compound amino acid solution: Mix the compound amino acids (the compound amino acids are obtained by mixing the following components: 15 parts by weight of lysine, 10 parts by weight of sodium selenite, and 1.0 part by weight of sodium selenite) in a mixing tank at a temperature of 40°C to fully dissolve the compound minerals and obtain a compound mineral solution. The mass ratio of purified water to compound minerals is 7:1. (3) The compound amino acid solution is prepared by mixing 15 parts by weight of methionine, 7 parts by weight of threonine, 4 parts by weight of tryptophan) and purified water in a mixing tank at a temperature of 40°C to fully dissolve the compound amino acid solution. The mass ratio of purified water to compound trace elements is 7:1. (4) The compound vitamin solution is prepared by mixing the following components: 15 parts by weight of vitamin A, 10 parts by weight of vitamin D3, 8 parts by weight of vitamin C, 7 parts by weight of vitamin E, 5 parts by weight of vitamin B1, 3 parts by weight of vitamin B2, 1 part by weight of vitamin B3, 1.5 parts by weight of vitamin B5, 0.8 parts by weight of vitamin B6, 0.8 parts by weight of vitamin B1, 3 parts by weight of vitamin B2, 1 part by weight of vitamin B3, 1.5 parts by weight of vitamin B5, 0.8 parts by weight of vitamin B6, 0.8 parts by weight of vitamin B1, 0.8 parts by weight of vitamin B2, 0.8 parts by weight of vitamin B6 ... 12 0.5 parts by weight of vitamin K3 and purified water are mixed in a mixing tank at a temperature of 40°C to fully dissolve the complex vitamins and obtain a complex vitamin solution. The mass ratio of purified water to complex vitamins is 7:1. (4) Preparation of mixed emulsion: The basic milk obtained in S1 is transported to a vacuum mixer with a vacuum degree of -0.09MPa, a rotation speed of 150rpm and a temperature of 40°C. Then, 25 parts by weight of complex mineral solution are added and mixed for 4 minutes. Then, 15 parts by weight of complex amino acid solution are added and mixed for 4 minutes. Finally, 8 parts by weight of complex vitamins are added and mixed for 3 minutes to obtain a mixed emulsion.

[0047] S3. Filtration and homogenization: The mixed emulsion obtained in S2 is filtered through a double filter with a filter diameter of 50 μm and then homogenized in a homogenizer with a pressure of 18 MPa and a speed of 500 rpm for 15 min.

[0048] S4. Sterilization and Concentration: The homogenized mixed emulsion is sterilized using steam injection instantaneous sterilization technology, wherein the sterilization temperature of steam injection instantaneous sterilization is 100℃ and the steam flow rate is 20m³ / h. 3The process involves a vacuum level of -90 kPa, a steam pressure of 0.8 MPa, and a sterilization time of 60 seconds. The sterilized emulsion is then fed into a falling film evaporator for concentration before being discharged as concentrated milk. The falling film evaporator consists of four evaporators connected in series: a first-effect evaporator (65℃), a second-effect evaporator (60℃), a third-effect evaporator (55℃), and a fourth-effect evaporator (50℃). The density of the discharged milk is 1200 kg / m³. 3 The mass concentration of the discharged material is 50%.

[0049] S5. Spray drying: The concentrated milk obtained in S4 is transported to a spray drying tower for drying to obtain spray-dried milk powder. The inlet air temperature of the spray drying tower is 160℃, the outlet air temperature is 75℃, and the negative pressure inside the drying tower is -25Pa.

[0050] S6. Fluidized bed drying: The spray-dried milk powder is conveyed to a fluidized bed for drying, so that the moisture content of the milk powder is ≤4.0%. The temperature of the first stage of the fluidized bed is 45℃, the time is 15min, and the fluidization velocity is 0.2m / s; the temperature of the second stage of the fluidized bed is 35℃, the time is 8min, and the fluidization velocity is 0.2m / s.

[0051] S7. Add probiotic powder: Weigh 80 parts by weight of fluidized bed dried milk powder and 0.02 parts by weight of probiotic powder (the probiotic powder is composed of Lactobacillus powder, Bacillus subtilis powder, and Bifidobacterium powder in a mass ratio of 1:1:1, with a live bacteria count ≥1.0×10⁻⁶). 10 Mix (CFU / g) thoroughly under sterile conditions.

[0052] S8. Testing and Packaging: After testing the milk powder with added probiotics for metal foreign objects, it is packaged in a sterile environment to obtain piglet formula milk powder.

[0053] Example 3: A method for preparing piglet formula milk powder includes the following preparation steps: S1. Preparation of basic milk liquid: 88 parts by weight of raw milk, 8 parts by weight of whey powder, 4 parts by weight of whey protein concentrate, 3 parts by weight of casein, 5 parts by weight of nutritional fortifier (obtained by mixing the following components: 12 parts by weight of inulin, 6 parts by weight of astragalus polysaccharide, 3 parts by weight of disodium 5'-inosinate, 1.0 part by weight of β-nicotinamide mononucleotide), and 3 parts by weight of oligosaccharide (composed of mannan oligosaccharide and fructooligosaccharide in a mass ratio of 1:1) are added to the mixing tank and stirred at 380 rpm for 28 minutes at 45°C to obtain basic milk liquid.

[0054] S2. Preparation of mixed emulsion: (1) Preparation of compound mineral solution: Mix the compound minerals and purified water in a mixing tank at a temperature of 45°C. Mix the compound minerals (the compound minerals are obtained by mixing the following components: 22 parts by weight of calcium carbonate, 8 parts by weight of calcium hydrogen phosphate, 7 parts by weight of ferrous sulfate, 5 parts by weight of zinc gluconate, and 1.0 part by weight of sodium selenite) and purified water in a mixing tank at a temperature of 45°C to fully dissolve the compound minerals and obtain a compound mineral solution. The mass ratio of purified water to compound minerals is 8:1. (2) Preparation of compound amino acid solution: Mix the compound amino acids (the compound amino acids are obtained by mixing the following components: 18 parts by weight of lysine, 11 parts by weight of sodium selenite, and 1.0 part by weight of sodium selenite) in a mixing tank at a temperature of 45°C to fully dissolve the compound minerals and obtain a compound mineral solution. The mass ratio of purified water to compound minerals is 8:1. (3) The compound vitamin solution is prepared by mixing the following components: 16 parts by weight of vitamin A, 11 parts by weight of vitamin D3, 9 parts by weight of vitamin C, 8 parts by weight of vitamin E, 6 parts by weight of vitamin B1, 4 parts by weight of vitamin B2, 2 parts by weight of vitamin B3, 1.8 parts by weight of vitamin B5, 1.0 parts by weight of vitamin B6, and 0.9 parts by weight of vitamin B6. 12 0.8 parts by weight of vitamin K3 and purified water are mixed in a mixing tank at a temperature of 45°C to fully dissolve the complex vitamins and obtain a complex vitamin solution. The mass ratio of purified water to complex vitamins is 8:1. (4) Preparation of mixed emulsion: The basic milk obtained in S1 is transported to a vacuum mixer with a vacuum degree of -0.08MPa, a rotation speed of 180rpm and a temperature of 45°C. Then, 28 parts by weight of complex mineral solution are added and mixed for 3 minutes. Then, 18 parts by weight of complex amino acid solution are added and mixed for 3 minutes. Finally, 9 parts by weight of complex vitamins are added and mixed for 3 minutes to obtain a mixed emulsion.

[0055] S3. Filtration and homogenization: The mixed emulsion obtained in S2 is filtered through a double filter with a filter diameter of 50 μm and then homogenized in a homogenizer with a pressure of 20 MPa and a speed of 550 rpm for 12 min.

[0056] S4. Sterilization and Concentration: The homogenized mixed emulsion is sterilized using steam injection instantaneous sterilization technology, wherein the sterilization temperature of steam injection instantaneous sterilization is 100℃ and the steam flow rate is 20m³ / h. 3The process involves a vacuum level of -85 kPa, a steam pressure of 1.0 MPa, and a sterilization time of 65 seconds. The sterilized emulsion is then fed into a falling film evaporator for concentration before being discharged as concentrated milk. The falling film evaporator consists of four evaporators connected in series: a first-effect evaporator (70℃), a second-effect evaporator (60℃), a third-effect evaporator (55℃), and a fourth-effect evaporator (50℃). The density of the discharged milk is 1100 kg / m³. 3 The mass concentration of the discharged material is 40%.

[0057] S5. Spray drying: The concentrated milk obtained in S4 is transported to a spray drying tower for drying to obtain spray-dried milk powder. The inlet air temperature of the spray drying tower is 170℃, the outlet air temperature is 78℃, and the negative pressure inside the drying tower is -20Pa.

[0058] S6. Fluidized bed drying: The spray-dried milk powder is conveyed to a fluidized bed for drying, so that the moisture content of the milk powder is ≤4.0%. The temperature of the first stage of the fluidized bed is 48℃, the time is 12min, and the fluidization velocity is 0.3m / s; the temperature of the second stage of the fluidized bed is 38℃, the time is 9min, and the fluidization velocity is 0.3m / s.

[0059] S7. Add probiotic powder: Weigh 85 parts by weight of fluidized bed dried milk powder and 0.03 parts by weight of probiotic powder (the probiotic powder is composed of Lactobacillus powder, Bacillus subtilis powder, and Bifidobacterium powder in a mass ratio of 1:1:1, with a live bacteria count ≥1.0×10⁻⁶). 10 Mix (CFU / g) thoroughly under sterile conditions.

[0060] S8. Testing and Packaging: After testing the milk powder with added probiotics for metal foreign objects, it is packaged in a sterile environment to obtain piglet formula milk powder.

[0061] Comparative Example 1: Compared with Example 1, the present invention differs in that it does not add probiotic powder.

[0062] Comparative Example 2: Compared with Example 1, the present invention differs in that no nutritional fortifier is added.

[0063] The piglet formula milk powders prepared in Examples 1, 2, 3, Comparative Example 1, and Comparative Example 2 were mixed at a milk powder:water ratio of 1:5, dissolved and prepared with 50-55℃ water, 100mL of warm water per feeding, 6 times a day. The experiment was conducted from 7 to 21 days after birth for weaning. The control group was fed commercially available piglet milk powder. The experimental results are shown in Table 1.

[0064] Table 1: Experimental Results

[0065] As shown in Table 1, the average daily weight gain and survival rate of piglets in the examples were higher than those of the control group and the CK group, while their diarrhea rate was significantly lower than that of the control group and the CK group.

[0066] It is evident that probiotic powder composed of Lactobacillus powder, Bacillus subtilis powder, and Bifidobacterium powder can maintain the balance of the intestinal microecology, reduce intestinal infections, and assist piglets in digesting macromolecules such as starch and protein in milk powder, improving nutrient utilization. Probiotics can stabilize the flora structure, promote the proliferation of intestinal epithelial cells, prevent the invasion of harmful substances and pathogens, reduce the risk of diarrhea, and improve the survival rate of piglets. Inulin can be fermented by beneficial bacteria such as Lactobacillus and Bifidobacterium in the intestine, lowering the intestinal pH, inhibiting the growth of harmful bacteria such as Escherichia coli, while promoting the proliferation of beneficial bacteria, reducing the expression of pro-inflammatory cytokines in the intestine, reducing inflammatory responses, enhancing immune function, and improving the survival rate of piglets. Astragalus polysaccharides can promote antibody production, increase the activity of serum immunoglobulins, enhance immune function, reduce the incidence of diseases in piglets, and improve the survival rate of piglets. β-Nicotinamide mononucleotide can protect the integrity of the intestinal mucosa, reduce the incidence of diarrhea, and promote intestinal health through its antioxidant and anti-inflammatory effects.

[0067] In summary, the piglet formula milk powder prepared by this invention is rich in probiotics, nutritional fortifiers, vitamins, amino acids, minerals and other nutrients, which can meet the nutritional needs of piglets growing rapidly, reduce the chances of indigestion, diarrhea and death in piglets, and promote healthy growth of piglets.

[0068] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A method for preparing piglet formula milk powder, characterized in that, The preparation steps include the following: S1. Preparation of basic milk liquid: Add 85-90 parts by weight of raw milk, 6-10 parts by weight of whey powder, 3-5 parts by weight of whey protein concentrate, 2-5 parts by weight of casein, 4-7 parts by weight of nutritional fortifier, and 2-4 parts by weight of oligosaccharide to a mixing tank, and stir at 350-400 rpm for 25-30 minutes at 40-50℃ to obtain basic milk liquid; S2. Preparation of mixed emulsion: The basic milk obtained in S1 is fed into a vacuum mixer, and then 25-30 parts by weight of compound mineral solution is added and stirred for 3-4 minutes; then 15-20 parts by weight of compound amino acid solution is added and stirred for 3-4 minutes; finally, 8-10 parts by weight of compound vitamins are added and stirred for 3-4 minutes to obtain mixed emulsion. S3. Filtration and homogenization: The mixed emulsion obtained in S2 is filtered through a double filter with a filter diameter of 50μm and then transferred to a homogenizer for homogenization. S4. Sterilization and Concentration: The homogenized mixed emulsion is sterilized using steam injection instantaneous sterilization technology, and then fed into a falling film evaporator for concentration before being discharged to obtain concentrated milk; S5. Spray drying: The concentrated milk obtained in S4 is transported to a spray drying tower for drying to obtain spray-dried milk powder; S6. Fluidized bed drying: The spray-dried milk powder is conveyed to a fluidized bed for drying, so that the moisture content of the milk powder is ≤4.0%; S7. Add probiotic powder: Weigh 80-90 parts by weight of fluidized bed dried milk powder and 0.02-0.05 parts by weight of probiotic powder and mix them evenly under sterile conditions; S8. Testing and Packaging: After testing the milk powder with added probiotics for metal foreign objects, it is packaged in a sterile environment to obtain piglet formula milk powder.

2. The method for preparing piglet formula milk powder according to claim 1, characterized in that: The nutrient fortifier is obtained by mixing the following components: 10-15 parts by weight of inulin, 4-8 parts by weight of astragalus polysaccharide, 2-5 parts by weight of disodium 5'-inosinate, and 0.8-1.2 parts by weight of β-nicotinamide mononucleotide; The oligosaccharide is composed of mannan oligosaccharide and fructooligosaccharide in a mass ratio of 1 to 2:

1.

3. The method for preparing piglet formula milk powder according to claim 1, characterized in that: The composite mineral solution is prepared by the following method: the composite minerals and purified water are stirred and mixed in a mixing tank at a temperature of 40-50°C in a certain proportion to fully dissolve the composite minerals and obtain the composite mineral solution, wherein the mass ratio of purified water to composite minerals is 7-8:

1. The compound amino acid solution is prepared by the following method: the compound amino acid and purified water are stirred and mixed in a mixing tank at a temperature of 40-50°C in a certain proportion to fully dissolve the compound amino acid and obtain the compound amino acid solution, wherein the mass ratio of purified water to compound trace elements is 7-8:

1. The compound vitamin solution is prepared by the following method: compound vitamins and purified water are stirred and mixed in a mixing tank at a temperature of 40-50°C to fully dissolve the compound vitamins, thereby obtaining a compound vitamin solution, wherein the mass ratio of purified water to compound vitamins is 7-8:

1.

4. The method for preparing piglet formula milk powder according to claim 1, characterized in that: The vacuum mixer in S2 has a vacuum degree of -0.09 to -0.08 MPa, a rotation speed of 150 to 200 rpm, and a temperature of 40 to 50°C. The homogenizer in S3 has a pressure of 18-20 MPa, a rotation speed of 500-600 rpm, and a homogenization time of 10-15 min.

5. The method for preparing piglet formula milk powder according to claim 1, characterized in that, In S4: The steam injection instantaneous sterilization temperature is 100–105℃, and the steam flow rate is 20–25 m³ / h. 3 / h, vacuum degree -90~-85kPa, steam pressure 0.8~1.0MPa, sterilization time 60~70s; The falling film evaporator is composed of a first-effect evaporator, a second-effect evaporator, a third-effect evaporator, and a fourth-effect evaporator connected in series. The temperature of the first-effect evaporator is 65-75℃, the temperature of the second-effect evaporator is 60-65℃, the temperature of the third-effect evaporator is 55-60℃, and the temperature of the fourth-effect evaporator is 50-55℃. The density of the discharged material is 1100-1200 kg / m³. 3 The mass concentration of the discharged material is 40-50%.

6. The method for preparing piglet formula milk powder according to claim 1, characterized in that, The inlet air temperature of the spray drying tower in S5 is 160-180℃, the outlet air temperature is 75-80℃, and the negative pressure inside the drying tower is -25 to -10Pa.

7. The method for preparing piglet formula milk powder according to claim 1, characterized in that, In S6, the temperature of the first stage of the fluidized bed is 45-50℃, the time is 10-15 min, and the fluidization velocity is 0.2-0.5 m / s; the temperature of the second stage of the fluidized bed is 35-40℃, the time is 8-10 min, and the fluidization velocity is 0.2-0.5 m / s.

8. The method for preparing piglet formula milk powder according to claim 1, characterized in that, The probiotic powder is composed of Lactobacillus powder, Bacillus subtilis powder, and Bifidobacterium powder in a mass ratio of 1-2:1:1; the viable count of each of the Lactobacillus powder, Bacillus subtilis powder, and Bifidobacterium powder is ≥1.0×10⁻⁶. 10 CFU / g.

9. The method for preparing piglet formula milk powder according to claim 3, characterized in that: The composite mineral is obtained by mixing the following components: 20-25 parts by weight of calcium carbonate, 7-10 parts by weight of calcium hydrogen phosphate, 6-8 parts by weight of ferrous sulfate, 4-6 parts by weight of zinc gluconate, and 1.0-1.2 parts by weight of sodium selenite. The complex amino acid is obtained by mixing the following components: 15-20 parts by weight of lysine, 10-12 parts by weight of methionine, 7-10 parts by weight of threonine, and 4-6 parts by weight of tryptophan. The complex vitamin is obtained by mixing the following components: 15-18 parts by weight of vitamin A, 10-12 parts by weight of vitamin D3, 8-10 parts by weight of vitamin C, 7-9 parts by weight of vitamin E, 5-7 parts by weight of vitamin B1, 3-5 parts by weight of vitamin B2, 1-3 parts by weight of vitamin B3, 1.5-2.0 parts by weight of vitamin B5, 0.8-1.2 parts by weight of vitamin B6, and 0.8-1.0 parts by weight of vitamin B1. 12 0.5 to 1.0 parts by weight of vitamin K3.

10. A formula milk powder for piglets, characterized in that, It is prepared by the preparation method of any one of claims 1 to 9.

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