Preparation method of high-calcium high-protein goat milk powder

Abstract

The invention discloses a preparation method of high-calcium high-protein goat milk powder, which comprises the following steps: S1, treating fresh and raw milk, receiving and detecting raw goat milk, cooling the raw goat milk to 0-4 DEG C within 2 hours after milking, and transporting the raw goat milk through a vehicle with the transportation temperature controlled to be 0-6 DEG C; and S2, refrigerating and purifying the milk: refrigerating the qualified fresh milk to 0-6 DEG C, then performing milk purification treatment, and completing pasteurization within 20 hours, so that the impurity degree is less than or equal to 4mg / kg after the milk purification treatment. The goat milk powder has the advantage of high nutritional value, and the problems that in the preparation process of existing goat milk powder, the nutrition retention effect of goat milk is poor, the flowing speed of nutritional ingredients in the goat milk in the preparation process is easily caused, and the product quality of the goat milk powder is reduced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of dairy product processing, and specifically relates to a preparation method of high-calcium and high-protein sheep milk powder. Background Art

[0002] High-calcium and high-protein sheep milk powder is a kind of dairy product, mainly prepared from sheep milk. This kind of sheep milk powder not only retains the original nutrients in sheep milk, such as natural vitamins, minerals, and fatty acids, etc., but also increases the proportion of calcium and protein through specific processes to meet the higher nutritional needs of specific populations. Calcium is a key element for maintaining bone health and is very important for the growth and development of children, the maintenance of bone density in adults, and the prevention of osteoporosis in the elderly. Protein is the basic material for the body to build and repair tissues and plays an important role in aspects such as muscle growth and the maintenance of immune system function.

[0003] In the process of preparing the existing sheep milk powder, the nutritional retention effect of sheep milk is poor, which easily leads to the loss of nutritional components in sheep milk during the preparation process, reducing the product quality of sheep milk powder. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation method of high-calcium and high-protein sheep milk powder, which has the advantage of high nutritional value, and solves the problem that in the process of preparing the existing sheep milk powder, the nutritional retention effect of sheep milk is poor, which easily leads to the loss of nutritional components in sheep milk during the preparation process, reducing the product quality of sheep milk powder.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A preparation method of high-calcium and high-protein sheep milk powder, comprising the following steps:

[0006] S1. Fresh raw milk treatment, receiving and detecting raw sheep milk, cooling the raw sheep milk to 0°C - 4°C within 2 hours after milking, and transporting it by a vehicle with a transportation temperature controlled at 0°C - 6°C;

[0007] S2. Refrigeration and clarification, refrigerating the qualified fresh raw milk to 0°C - 6°C, then performing clarification treatment, and completing pasteurization within 20 hours. After clarification treatment, the impurity degree ≤ 4mg / kg;

[0008] S3. Pasteurization and cooling, adopting the processes of preheating, pasteurization, and cooling. The pasteurization temperature is 85°C - 105°C, the flow rate is controlled at 12 - 16m 3 / h, the sterilization time is 9 - 13 seconds, and it is stored after cooling to 3°C - 10°C;

[0009] S4. Standardize the ingredients, receive the raw materials, auxiliary materials and nutritional fortifiers according to the formula of high-calcium and high-protein goat milk powder, remove the packaging and perform sterilization treatment. At a water temperature of 40°C to 50°C, add nutrients to the purified water in the order of minerals, vitamins, and calcium powder, and stir. The addition interval of different nutrients is 3 - 5 minutes. Heat the cooked milk to 50°C to 60°C, pour the heated cooked milk and the raw material solution into a high-speed shear emulsifier, dissolve by circulating through the high-speed shear emulsifier, perform rough filtration after constant volume, and then process through a high-pressure homogenizer;

[0010] S5. Sterilize and concentrate. Under a vacuum of -0.090 to -0.08 MPa, the mixed milk liquid is subjected to triple-effect concentration by indirect steam heating. The temperature of the first effect is 65°C to 80°C, the temperature of the second effect is 50°C to 70°C, and the temperature of the third effect is 45°C to 60°C. The density of the discharged concentrated milk is 1070 kg / m 3 ~1180 kg / m 3 ;

[0011] S6. Spray drying. After filtering the concentrated milk through a 100-mesh filter screen, spray it into the drying tower at a pressure of 70 - 200 bar to prepare milk powder;

[0012] S7. Cooling and screening. The milk powder is cooled to ≤30°C through a three-stage fluidized bed and the lumps are removed by a vibrating screen;

[0013] S8. Packaging and inspection. After passing through a metal detector, the cooled milk powder is packaged using a 25-kg fully automatic large-packaging machine, and the outer bag is marked with the production date, batch number, and product name;

[0014] S9. In-warehouse inspection. Stack and classify according to the production date and batch number in the semi-finished product warehouse, and the inspection center conducts inspections according to the internal control standards.

[0015] Preferably, as a method for preparing high-calcium and high-protein goat milk powder of the present invention, the flow rate and time of pasteurization are controlled by adjusting the pump frequency, wherein the flow rate is 12 - 16 m 3 / h, and the sterilization time is 9 - 13 seconds.

[0016] Preferably, as a method for preparing high-calcium and high-protein goat milk powder of the present invention, when adding vegetable oil in the standardized ingredients, it is first preheated and melted, and the metering accuracy is ensured through double-person review.

[0017] Preferably, as a method for preparing high-calcium and high-protein goat milk powder of the present invention, the pressure of the homogenizer is 15 MPa - 20 MPa, and the temperature is controlled at 55°C - 60°C to disperse the fat globules and prevent precipitation.

[0018] Preferably, in the method for preparing a high-calcium and high-protein sheep milk powder according to the present invention, during spray drying, the inlet air temperature is 140°C - 180°C, the outlet air temperature is 60°C - 90°C, and the high-pressure pump pressure is 110 - 200 bar.

[0019] Preferably, in the method for preparing a high-calcium and high-protein sheep milk powder according to the present invention, the metal detector includes three detection modules for Fe, non-Fe, and stainless steel, and can detect metal foreign objects with ball diameters of Φ≥1 mm and Φ≥2 mm respectively.

[0020] Preferably, in the method for preparing a high-calcium and high-protein sheep milk powder according to the present invention, the pH value of the production water is 6.5 - 8.5, nitrate and nitrite are negative, and the residual chlorine ≤ 4 mg / L.

[0021] Preferably, in the method for preparing a high-calcium and high-protein sheep milk powder according to the present invention, during sterilization and concentration, the boiling point of the material is lower than atmospheric pressure, and the heat-sensitive nutrients are retained.

[0022] Preferably, in the method for preparing a high-calcium and high-protein sheep milk powder according to the present invention, in the cooling step, the temperature is gradually decreased through a three-stage fluidized bed, and the final powder outlet temperature ≤ 30°C, and the particle size is ensured to be uniform through a vibrating screen.

[0023] Preferably, in the method for preparing a high-calcium and high-protein sheep milk powder according to the present invention, during packaging, the inner and outer bags are sterilized by ultraviolet rays for more than 30 minutes and are hermetically transported to the packaging machine in the inner packaging room.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. The present invention retains heat-sensitive nutrients through low-temperature sterilization and vacuum concentration. The pasteurization temperature is controlled at 85°C - 105°C, the time is short, reducing protein denaturation and vitamin loss. The vacuum triple-effect concentration reduces the boiling point, avoiding the destruction of heat-sensitive nutrients at high temperatures, effectively retaining the natural nutritional value of sheep milk. The high-pressure homogenization pressure is 15 - 20 MPa, and the fat globules are evenly dispersed, preventing fat from floating or precipitating after the milk powder is reconstituted, improving the taste and stability. The double-check system for raw and auxiliary materials, the sequential addition of nutrients, and the control of dissolution time ensure the accuracy of ingredient preparation and the nutritional fortification effect.

[0026] 2. The present invention strictly controls from the source of raw materials. The acceptance standards for raw fresh milk are strict, and the temperature is controlled throughout the transportation and storage processes to prevent the growth of microorganisms. The raw and auxiliary materials come from qualified suppliers and can be used only after passing the inspection. Multiple protection measures such as ultraviolet sterilization of packaging materials, hermetic transportation, and metal foreign object detection ensure that the final product is free of pollution and foreign objects. Purified water is used, and indicators such as pH value, total colony count, and nitrate meet the standards, ensuring the safety of production water. Description of the Drawings

[0027] Figure 1This is a schematic diagram of the preparation process of the present invention. Detailed implementation manners

[0028] Please refer to Figure 1 , a method for preparing high-calcium and high-protein goat milk powder, comprising the following steps:

[0029] S1. Fresh milk treatment: Receive and detect raw goat milk, cool the raw goat milk to 0°C - 4°C within 2 hours after milking, and transport it by a vehicle with a controlled transport temperature of 0°C - 6°C;

[0030] S2. Refrigeration and milk clarification: Refrigerate the qualified fresh milk to 0°C - 6°C, then perform milk clarification treatment, and complete pasteurization within 20 hours. After milk clarification treatment, the impurity degree is ≤ 4 mg / kg;

[0031] S3. Pasteurization and cooling: Adopt the processes of preheating, pasteurization and cooling. The pasteurization temperature is 85°C - 105°C, the flow rate is controlled at 12 - 16 m 3 / h, the sterilization time is 9 - 13 seconds, and store after cooling to 3°C - 10°C;

[0032] S4. Standardized batching: Receive the raw materials, auxiliary materials and nutritional fortifiers according to the formula of high-calcium and high-protein goat milk powder, perform unpacking and sterilization treatment. Add nutrients to purified water in the order of minerals, vitamins, and calcium powder at a water temperature of 40°C - 50°C, and stir. The addition interval of different nutrients is 3 - 5 minutes. Heat the cooked milk to 50°C - 60°C, pour the heated cooked milk and the raw material solution into a high-speed shear emulsifier, dissolve through the high-speed shear emulsifier in a cycle, perform rough filtration after constant volume, and then process through a high-pressure homogenizer;

[0033] S5. Sterilization and concentration: Under a vacuum degree of -0.090 - -0.08 MPa, perform triple-effect concentration on the mixed milk liquid by indirect steam heating. The temperature of the first effect is 65°C - 80°C, the temperature of the second effect is 50°C - 70°C, the temperature of the third effect is 45°C - 60°C, and the density of the discharged concentrated milk is 1070 kg / m 3 ~1180 kg / m 3 ;

[0034] S6. Spray drying: Filter the concentrated milk through a 100-mesh filter screen, and spray it into the drying tower at a pressure of 70 - 200 bar to prepare milk powder;

[0035] S7. Cooling and screening: Cool the milk powder to ≤ 30°C through a three-stage fluidized bed, and screen out lumps through a vibrating screen;

[0036] S8. Packaging and detection: After the cooled milk powder passes through a metal detector, package it with a 25-kg fully automatic large packaging machine, and mark the production date, batch number and product name on the outer bag;

[0037] S9. In-warehouse inspection: Stack and code by production date and batch number in the semi-finished product warehouse, and the inspection center conducts tests according to internal control standards.

[0038] Further, the flow rate and time of pasteurization are controlled by adjusting the pump frequency, where the flow rate is 12 - 16 m 3 / h, and the sterilization time is 9 - 13 seconds.

[0039] Further, when adding vegetable oil in the standardized ingredients, it is preheated and melted first, and double-person verification is carried out to ensure the accuracy of metering.

[0040] Further, the pressure of the homogenizer is 15 MPa - 20 MPa, and the temperature is controlled at 55°C - 60°C to disperse fat globules and prevent precipitation.

[0041] Further, the inlet air temperature during spray drying is 140°C - 180°C, the exhaust air temperature is 60°C - 90°C, and the pressure of the high-pressure pump is 110 - 200 bar.

[0042] Further, the metal detector includes three detection modules for Fe, non-Fe, and stainless steel, and can detect metal foreign objects with ball diameters of Φ≥1 mm and Φ≥2 mm respectively.

[0043] Further, the pH value of the production water is 6.5 - 8.5, nitrate and nitrite are negative, and the residual chlorine ≤ 4 mg / L.

[0044] Further, the boiling point of the material is lower than the atmospheric pressure during sterilization concentration, and heat-sensitive nutrients are retained.

[0045] Further, the cooling step is gradually cooled through three-stage fluidized beds, and the final powder outlet temperature ≤ 30°C, and the particle size is ensured to be uniform through a vibrating screen.

[0046] Further, during packaging, the inner and outer bags are sterilized by ultraviolet rays for more than 30 minutes and are conveyed to the packaging machine in a closed manner in the inner packaging room.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A preparation method of high-calcium and high-protein goat milk powder, characterized in that, It includes the following steps: S1. Fresh raw milk treatment: Receive and detect raw sheep milk, cool the raw sheep milk to 0°C - 4°C within 2 hours after milking, and transport it by a vehicle with a controlled transport temperature of 0°C - 6°C; S2. Refrigeration and clarification: Refrigerate the qualified fresh raw milk to 0°C - 6°C, then conduct clarification treatment, and complete pasteurization within 20 hours. After clarification treatment, the impurity degree ≤ 4mg / kg; S3. Pasteurization and cooling, adopting the processes of preheating, pasteurization and cooling. The pasteurization temperature is 85°C to 105°C, the flow rate is controlled at 12 to 16 m 3 / h, the sterilization time is 9 to 13 seconds, and it is stored after being cooled to 3°C to 10°C; S4. Standardized batching: Receive the raw materials, auxiliary materials and nutritional fortifiers according to the formula of high - calcium and high - protein sheep milk powder, conduct unpacking and sterilization treatment. At a water temperature of 40°C - 50°C, add nutrients to purified water in the order of minerals, vitamins, and calcium powder, and stir. The interval between adding different nutrients is 3 - 5 minutes. Heat the cooked milk to 50°C - 60°C. Pour the heated cooked milk and the raw material solution into a high - speed shear emulsifier, dissolve them by circulating through the high - speed shear emulsifier, conduct rough filtration after constant volume, and then process through a high - pressure homogenizer; S5. Sterilization and concentration: Under a vacuum degree of -0.090 to -0.08 MPa, the mixed milk liquid is subjected to triple-effect concentration through indirect steam heating. The temperature of the first effect is 65°C to 80°C, the temperature of the second effect is 50°C to 70°C, and the temperature of the third effect is 45°C to 60°C. The density of the discharged concentrated milk is 1070 kg / m 3 ~1180 kg / m 3 ; S6. Spray drying: Filter the concentrated milk through a 100 - mesh filter screen, and spray it into a drying tower at a pressure of 70 - 200 bar to prepare milk powder; S7. Cooling and screening: Cool the milk powder to ≤ 30°C through a three - stage fluidized bed, and screen out lumps through a vibrating screen; S8. Packaging and inspection: After the cooled milk powder passes through a metal detector, it is packaged by a 25 - kg full - automatic large - packaging machine, and the outer bag is marked with the production date, batch number and product name; S9. In - warehouse inspection: Classify and stack them in the semi - finished product warehouse according to the production date and batch number, and the inspection center conducts inspections according to the internal control standards.

2. The preparation method of a high-calcium and high-protein sheep milk powder according to claim 1, characterized in that: The flow rate and time of pasteurization are controlled by adjusting the pump frequency, where the flow rate is 12 - 16 m 3 / h, and the sterilization time is 9 - 13 seconds.

3. The preparation method of a high-calcium and high-protein sheep milk powder according to claim 1, characterized in that: When adding vegetable oil in standardized batching, it is pre - heated and melted first, and the metering accuracy is ensured through double - person review.

4. A method for preparing high-calcium and high-protein sheep milk powder according to claim 1, characterized in that: The pressure of the homogenizer is 15MPa - 20MPa, and the temperature is controlled at 55°C - 60°C to disperse fat globules and prevent precipitation.

5. The preparation method of a high-calcium and high-protein goat milk powder according to claim 1, characterized in that: During spray drying, the inlet air temperature is 140°C - 180°C, the exhaust air temperature is 60°C - 90°C, and the pressure of the high - pressure pump is 110 - 200 bar.

6. The preparation method of a high-calcium and high-protein sheep milk powder according to claim 1, wherein: The metal detector includes three detection modules of Fe, non - Fe, and stainless steel, and can detect metal foreign objects with ball diameters of Φ≥1mm and Φ≥2mm respectively.

7. A method for preparing high-calcium and high-protein goat milk powder according to claim 1, characterized in that: The pH value of the production water is 6.5 - 8.5, nitrate and nitrite are negative, and the residual chlorine ≤ 4mg / L.

8. A method for preparing high-calcium and high-protein sheep milk powder according to claim 1, characterized in that: During sterilization and concentration, the boiling point of the material is lower than atmospheric pressure, and heat - sensitive nutritional components are retained.

9. A method for preparing a high-calcium and high-protein sheep milk powder according to claim 1, characterized in that: In the cooling step, the temperature is gradually decreased through a three - stage fluidized bed, and the final powder outlet temperature ≤ 30°C, and the particle size is ensured to be uniform through a vibrating screen.

10. The preparation method of a high-calcium and high-protein goat milk powder according to claim 1, characterized in that: During packaging, the inner and outer bags are sterilized by ultraviolet rays for more than 30 minutes, and are transported to the packaging machine in a closed manner in the inner packaging room.

Images