Organic milk compounding system rich in DHA (docosahexaenoic acid) algal oil and efficient purification process of organic milk compounding system

Abstract

The invention belongs to the technical field of purification processes, and particularly relates to an organic milk compounding system rich in DHA algae oil and an efficient purification process thereof.The purification process comprises the following steps that S1, algae oil and organic milk are mixed in proportion, preliminary emulsification is conducted under the constant-temperature condition, and a preliminary mixed emulsion is obtained; s2, carrying out high-pressure homogenization treatment on the primarily mixed emulsion to form a stable emulsion; s3, a modified adsorbent is added into the stable emulsion for impurity adsorption, and purified emulsion is obtained; s4, sequentially performing low-temperature concentration and membrane separation treatment on the purified emulsion to obtain high-purity algae oil and organic milk compound liquid; s5, the high-purity algae oil and organic milk compound liquid is sequentially subjected to filling and low-temperature sterilization. After heating is transferred to the temporary storage tank, the composite tank body can focus on maintaining a stable high-pressure homogenizing condition, and interference of temperature change on a high-pressure environment is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of purification technology, and specifically relates to an organic milk compound system rich in DHA algae oil and an efficient purification process thereof. Background Art

[0002] DHA algae oil, as a natural source of Omega-3 fatty acids, has physiological functions such as promoting nervous system development and enhancing immunity. Organic milk is rich in high-quality protein, calcium, and natural milk fat. The combination of the two forms a product with nutritional complementarity and is experiencing growing market demand. However, the existing DHA algae oil and organic milk compounding and purification processes still face many technical bottlenecks. At present, the liquid heating of common homogenization methods in the prior art is usually achieved inside the homogenization tank. The homogenization tank of such equipment often integrates heating functions, such as a heating jacket on the tank wall, a built-in heating pipe, etc. During the homogenization process, the liquid in the tank is directly heated to adjust the material temperature. At the same time, there is high pressure and heating process, which causes the pressure and temperature to interfere with each other. For example, the liquid expands due to heat, further increasing the pressure in the tank, resulting in local flow differences of the material in the tank due to homogenization stirring, affecting the homogenization effect.

[0003] Therefore, in order to solve the above problems, an organic milk compound system rich in DHA algae oil and an efficient purification process thereof are proposed. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies of the prior art and to solve the technical problems raised in the background art by providing an organic milk compounding system rich in DHA algae oil and an efficient purification process thereof.

[0005] In response to the above technical problems, the following technical solutions are adopted: an organic milk compound system rich in DHA algae oil and an efficient purification process thereof, the purification process comprising the following steps: S1: algae oil and organic milk are mixed in proportion and preliminarily emulsified under constant temperature to obtain a premixed emulsion; S2: homogenizing the initially mixed emulsion through high pressure to form a stable emulsion; S3: adding a modified adsorbent to the stable emulsion to adsorb impurities to obtain a purified emulsion; S4: performing low-temperature concentration and membrane separation on the purified emulsion in sequence to obtain a high-purity algae oil organic milk composite liquid; S5: filling and low-temperature sterilizing the high-purity algae oil organic milk compound liquid in sequence.

[0006] Preferably, in step S1, the mass ratio of algae oil to organic milk is 1:8 to 1:12.

[0007] Preferably, in step S1, the constant temperature emulsification temperature is 35° C. to 40° C., and the emulsification time is 15 minutes to 25 minutes.

[0008] Preferably, in step S2, the pressure of the high-pressure homogenization is 50 MPa to 75 MPa; the number of homogenizations is 2 to 4 times; and the homogenization time is 5 to 10 minutes.

[0009] Preferably, in step S3, the amount of the modified adsorbent added is 0.5 wt% to 1.5 wt% of the total mass of the primary mixed emulsion; the modified adsorbent is composed of activated carbon, silica gel and molecular sieve; the mass ratio of the activated carbon, silica gel and molecular sieve is 2 to 3:1 to 2:1 to 1.5; In step S3, the impurity adsorption temperature is 20° C. to 25° C., and the adsorption time is 30 minutes to 40 minutes.

[0010] Preferably, in step S4, the temperature of the low-temperature concentration is 40° C. to 50° C., the concentration time is 20 minutes to 30 minutes; and the pore size of the membrane separation is 0.05 μm to 0.1 μm.

[0011] Preferably, in step S5, the low-temperature sterilization temperature is 70° C. to 75° C., and the sterilization time is 15 minutes to 20 minutes.

[0012] Preferably, an organic milk compound system rich in DHA algae oil is obtained by an efficient purification process of organic milk rich in DHA algae oil.

[0013] Preferably, the compound system comprises algae oil, organic milk and a trace amount of modified adsorbent residue.

[0014] Preferably, a high-pressure homogenizing device is further included, comprising a composite tank body and a vacuum pump, wherein a first homogenizing temporary storage tank and a second homogenizing temporary storage tank are connected to a pipeline on the composite tank body, a stirring device is provided on the top of the composite tank body, and the first homogenizing temporary storage tank and the second homogenizing temporary storage tank are both provided with a delivery pump and a heater, and the delivery pump is used to deliver the liquid in the first homogenizing temporary storage tank and the second homogenizing temporary storage tank to the composite tank body; The first homogenization temporary storage tank and the second homogenization temporary storage tank are provided with normally open pressure relief valves; The pipes connecting the first homogenization temporary storage tank and the second homogenization temporary storage tank to the composite tank body are respectively provided with electromagnetic valves for controlling the circulation of liquid and air.

[0015] Beneficial effects of the present invention: The composite tank is the core area of ​​high-pressure homogenization and needs to maintain a high-pressure environment of 50MPa to 75MPa to ensure the strength of homogenization effects such as shear and impact. If heated directly in the composite tank, the high temperature may cause the internal pressure of the tank to further increase. The thermal expansion of the liquid, combined with the basic pressure of the high-pressure homogenization, will only increase the pressure load of the equipment and may also affect the homogenization stability due to pressure fluctuations. After transferring the heating to the temporary storage tank, the composite tank can focus on maintaining stable high-pressure homogenization conditions, avoiding the interference of temperature changes on the high-pressure environment. At the same time, the first and second homogenization temporary storage tanks heat the liquid separately under non-high-pressure conditions, which can more accurately control the heating temperature, avoid the mutual interference between the high pressure and high temperature in the composite tank, and ensure that the viscosity of the liquid reaches the optimal value before entering the composite tank. Reducing the viscosity can improve the shear efficiency during high-pressure homogenization. Moreover, when the heated liquid enters the composite tank through reflux, it can immediately complete homogenization under stable high pressure, reducing the problem of viscosity rebound caused by temperature drop. In addition, the temporary tank heating can be combined with multiple homogenization cycles, 2 to 4 times, so that the liquid is in the optimal viscosity state before each homogenization. Compared with heating in a composite tank, which is prone to local overheating or uneven temperature, this method can make the liquid heated more evenly, thereby ensuring the consistency of the material state during each high-pressure homogenization. Ultimately, the standard deviation of the particle size distribution of the liquid after homogenization is reduced by about 10%-15%, and the 48-hour stratification rate is further controlled within 1.5%, significantly improving the stability and uniformity of the homogenization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] In the attached figure: Figure 1 This is a flow chart of an efficient purification process according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the framework of the high-pressure homogenization equipment according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] In order to further illustrate the technical means and effects adopted by the present invention, the technical scheme of the present invention is further described below in conjunction with the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments. The sources of the functional ingredients contained in the products involved in the following embodiments and comparative examples are as follows (only the functional ingredients are reflected, and the necessary auxiliary materials contained in other commercially available raw materials are not repeated).

[0020] See also Figure 1-Figure 2 The present invention provides an organic milk compound system rich in DHA algae oil and an efficient purification process thereof, wherein the purification process comprises the following steps: S1: algae oil and organic milk are mixed in proportion and preliminarily emulsified under constant temperature to obtain a premixed emulsion; S2: homogenizing the initially mixed emulsion through high pressure to form a stable emulsion; S3: adding a modified adsorbent to the stable emulsion to adsorb impurities to obtain a purified emulsion; S4: performing low-temperature concentration and membrane separation on the purified emulsion in sequence to obtain a high-purity algae oil organic milk composite liquid; S5: filling and low-temperature sterilizing the high-purity algae oil organic milk compound liquid in sequence.

[0021] Furthermore, in step S1, the mass ratio of algae oil to organic milk is 1:8 to 1:12.

[0022] Furthermore, in step S1, the constant temperature emulsification temperature is 35° C. to 40° C., and the emulsification time is 15 minutes to 25 minutes.

[0023] Furthermore, in step S2, the pressure of the high-pressure homogenization is 50 MPa to 75 MPa; the number of homogenizations is 2 to 4 times; and the homogenization time is 5 to 10 minutes.

[0024] Furthermore, in step S3, the amount of the modified adsorbent added is 0.5wt% to 1.5wt% of the total mass of the primary mixed emulsion; the modified adsorbent is composed of activated carbon, silica gel and molecular sieve; the mass ratio of the activated carbon, silica gel and molecular sieve is 2 to 3:1 to 2:1 to 1.5; In step S3, the impurity adsorption temperature is 20° C. to 25° C., and the adsorption time is 30 minutes to 40 minutes.

[0025] Furthermore, in step S4, the temperature of the low-temperature concentration is 40° C. to 50° C., the concentration time is 20 minutes to 30 minutes; and the pore size of the membrane separation is 0.05 μm to 0.1 μm.

[0026] Furthermore, in step S5, the low-temperature sterilization temperature is 70° C. to 75° C., and the sterilization time is 15 minutes to 20 minutes.

[0027] Furthermore, an organic milk compound system rich in DHA algae oil is obtained by an efficient purification process of organic milk rich in DHA algae oil.

[0028] Furthermore, the compound system comprises algae oil, organic milk and a trace amount of modified adsorbent residue.

[0029] Furthermore, a homogenizing device is also included, characterized in that: the homogenizing device includes a composite tank body and a vacuum pump, a first homogenizing temporary storage tank and a second homogenizing temporary storage tank are connected to the composite tank body by a pipeline, a stirring device is provided on the composite tank body, and the first homogenizing temporary storage tank and the second homogenizing temporary storage tank are both provided with a delivery pump and a heater, and the delivery pump is used to deliver the liquid in the first homogenizing temporary storage tank and the second homogenizing temporary storage tank to the composite tank body; The first homogenization temporary storage tank and the second homogenization temporary storage tank are provided with normally open pressure relief valves; The pipes connecting the first homogenization temporary storage tank and the second homogenization temporary storage tank to the composite tank body are respectively provided with electromagnetic valves for controlling the circulation of liquid and air.

[0030] The purification process also includes, during the homogenization process, delivering vacuum to the interior of the composite tank body by a vacuum pump, and when the vacuum inside the composite tank body reaches a threshold value, opening the first homogenization temporary storage tank and the second homogenization temporary storage tank, and both the pipes connected to the composite tank body are provided with electromagnetic valves for controlling the circulation of liquid and air. At this time, negative pressure is formed inside the first homogenization temporary storage tank and the second homogenization temporary storage tank, so that the liquid inside the composite tank body flows into the first homogenization temporary storage tank and the second homogenization temporary storage tank. At this time, the electromagnetic valves on the pipes are closed, and the first homogenization temporary storage tank and the second homogenization temporary storage tank heat the liquid. After heating, the electromagnetic valves on the pipes are opened, so that the liquid in the first homogenization temporary storage tank and the second homogenization temporary tank flow back to the interior of the composite tank body for further homogenization treatment, thereby greatly improving the homogenization effect; The high-pressure homogenization method uses a vacuum pump to create a vacuum in the composite tank. The liquid is sucked into the first and second homogenization temporary storage tanks by negative pressure, heated, and then returned to the composite tank for repeated homogenization. Combining a high pressure of 50MPa to 75MPa, 2 to 4 homogenization times, and a homogenization time of 5 to 10 minutes can significantly improve the homogenization effect: First, the high pressure of 50MPa to 75MPa causes the liquid to be subjected to strong shear, impact, and cavitation when passing through the homogenizing structure in the composite tank, which can break up the particles or droplets in the liquid into smaller sizes (usually reaching the submicron level). Repeated homogenization 2 to 4 times can compensate for the uneven refinement problem that may exist in a single homogenization, making all particles or droplets more uniform in size and preventing local particles from being too large and affecting the stability of the overall system. Secondly, the heating treatment of the first and second homogenization holding tanks (coordinated with the energy conversion and temperature increase during the homogenization process) can reduce the liquid viscosity, making the shear efficiency during high-pressure homogenization higher. At the same time, multiple reflux circulation homogenization (a total duration of 5 to 10 minutes to ensure sufficient circulation) allows the liquid to be subjected to uniform high pressure during each homogenization, reducing the homogenization differences caused by uneven initial distribution of the material. Ultimately, the liquid treated by this method not only has a small particle size (usually stable below 1μm), but also a narrow particle size distribution range, significantly improving system stability (for example, the 48-hour stratification rate of the emulsion can be controlled within 2%), effectively avoiding problems such as stratification and sedimentation during subsequent processing or storage. Compared with ordinary high-pressure homogenization (without vacuum circulation and heating assistance), the particle refinement of the homogenized liquid is improved by about 15%-20%, and the uniformity is improved by about 25%-30%, fully demonstrating the advantages of this method in improving homogenization effect. The heating process is only carried out in the first and second homogenization temporary storage tanks instead of the composite tank; Specifically, the composite tank is the core area of ​​high-pressure homogenization and needs to maintain a high-pressure environment of 50MPa to 75MPa to ensure the strength of homogenization effects such as shear and impact. If heated directly in the composite tank, the high temperature may cause the internal pressure of the tank to further increase (the liquid expands due to heat and the basic pressure of high-pressure homogenization is added). This will not only increase the pressure load of the equipment, but may also affect the homogenization stability due to pressure fluctuations. After transferring the heating to the temporary storage tank, the composite tank can focus on maintaining stable high-pressure homogenization conditions, avoiding the interference of temperature changes on the high-pressure environment. At the same time, the first and second homogenization storage tanks heat the liquid separately under non-high-pressure conditions, which can more accurately control the heating temperature (avoiding the mutual interference of high pressure and high temperature in the composite tank), ensuring that the liquid viscosity reaches the optimal value before entering the composite tank (reducing viscosity can improve shear efficiency during high-pressure homogenization). Moreover, when the heated liquid enters the composite tank through reflux, it can be immediately homogenized under stable high pressure, reducing the problem of viscosity rebound caused by temperature drop. In addition, the temporary tank heating can be combined with multiple homogenization cycles (2 to 4 times) to ensure that the liquid is in the optimal viscosity state before each homogenization. Compared with heating in a composite tank (which is prone to local overheating or uneven temperature), this method can make the liquid heated more evenly, thereby ensuring the consistency of the material state during each high-pressure homogenization. Ultimately, the standard deviation of the particle size distribution of the liquid after homogenization is reduced by about 10%-15%, and the 48-hour stratification rate is further controlled within 1.5%, significantly improving the stability and uniformity of the homogenization effect.

[0031] Specific examples are given below.

[0032] Example 1 S1 algae oil: organic milk (mass ratio) is 1:10; S1 constant temperature emulsification (temperature / time) is 38℃ / 20 minutes; S2 high-pressure homogenization (pressure / number of times / time) is 60MPa / 3 times / 8 minutes; The amount of S3 modified adsorbent added was 1.0 wt% of the total mass of the initial mixed emulsion; The adsorbent ratio of S3 (activated carbon: silica gel: molecular sieve) is 2.5:1.5:1.2; S3 adsorption (temperature / time) was 22 °C / 35 min; S4 low temperature concentration (temperature / time) is 45°C / 25 minutes; The separation pore size of the S4 membrane is 0.08 μm; S5 low temperature sterilization (temperature / time) is 72℃ / 18 minutes.

[0033] Example 2 S1 algae oil: organic milk (mass ratio) is 1:8; S1 constant temperature emulsification (temperature / time) is 35℃ / 25 minutes; S2 high pressure homogenization (pressure / number of times / time) is 50MPa / 4 times / 10 minutes; The amount of S3 modified adsorbent added was 0.5 wt% of the total mass of the initial mixed emulsion; The adsorbent ratio of S3 (activated carbon: silica gel: molecular sieve) is 2:1:1; S3 adsorption (temperature / time) was 20 °C / 40 min; S4 low temperature concentration (temperature / time) is 40℃ / 30 minutes; The separation pore size of the S4 membrane is 0.05 μm; S5 low temperature sterilization (temperature / time) is 70℃ / 20 minutes.

[0034] Example 3 S1 algae oil: organic milk (mass ratio) is 1:12; S1 constant temperature emulsification (temperature / time) is 40℃ / 15 minutes; S2 high pressure homogenization (pressure / number of times / time) is 75MPa / 2 times / 5 minutes; The amount of S3 modified adsorbent added was 1.5 wt% of the total mass of the initial mixed emulsion; The adsorbent ratio of S3 (activated carbon: silica gel: molecular sieve) is 3:2:1.5; S3 adsorption (temperature / time) was 25 °C / 30 min; S4 low temperature concentration (temperature / time) is 50℃ / 20 minutes; The separation pore size of the S4 membrane is 0.1 μm; S5 low temperature sterilization (temperature / time) is 75℃ / 15 minutes.

[0035] Comparative Example 1 S1 algae oil: organic milk (mass ratio) is 1:5; S1 constant temperature emulsification (temperature / time) is 38℃ / 20 minutes; S2 ordinary homogenization method (number of times / time) is 3 times / 8 minutes; The addition amount of S3 modified adsorbent is 1.0wt%; The adsorbent ratio of S3 (activated carbon: silica gel: molecular sieve) is 2.5:1.5:1.2; S4 low temperature concentration (temperature / time) is 45°C / 25 minutes; The separation pore size of the S4 membrane is 0.08 μm; S5 low temperature sterilization (temperature / time) is 72℃ / 18 minutes.

[0036] Comparative Example 2 S1 algae oil: organic milk (mass ratio) is 1:10; S1 constant temperature emulsification (temperature / time) is 38℃ / 20 minutes; S2 ordinary homogenization method (number of times / time) is 3 times / 8 minutes; The addition amount of S3 modified adsorbent is 1.0wt%; The adsorbent ratio of S3 (activated carbon: silica gel: molecular sieve) is 2.5:1.5:1.2; S4 low temperature concentration (temperature / time) is 45°C / 25 minutes; The separation pore size of the S4 membrane is 0.08 μm; S5 low temperature sterilization (temperature / time) is 72℃ / 18 minutes.

[0037] Comparative Example 3 S1 algae oil: organic milk (mass ratio) is 1:10; S1 constant temperature emulsification (temperature / time) is 38℃ / 20 minutes; S2 ordinary homogenization method (number of times / time) is 3 times / 8 minutes; The addition amount of S3 modified adsorbent is 2.0wt%; The adsorbent ratio of S3 (activated carbon: silica gel: molecular sieve) is 4:1:1; S4 low temperature concentration (temperature / time) is 45°C / 25 minutes; The separation pore size of the S4 membrane is 0.08 μm; S5 low temperature sterilization (temperature / time) is 72℃ / 18 minutes.

[0038] The conclusions of the examples are shown in the following table:

[0039] The comparative conclusion analysis is as follows:

[0040] DHA retention rate: Examples 1-3 all maintained above 90%, as parameter matching resulted in less damage to DHA during emulsification and sterilization. Comparative Examples 1-3 suffered significant DHA loss due to unbalanced raw material ratios, insufficient homogenization, and other issues. Impurity removal rate: The impurity removal rates of Examples 1-3 exceeded 92% due to reasonable adsorbent dosage and homogenization parameters; Comparative Examples 1-3 had more impurities remaining due to poor particle state or low adsorption efficiency; Emulsion stability: The 48h stratification rate of Examples 1-3 was less than 2%, and high-pressure homogenization and constant temperature emulsification formed a stable system; Comparative Examples 1-3 showed obvious stratification due to system imbalance.

[0041] In the conventional homogenization methods described in Comparative Examples 1-3, liquid heating is typically achieved within the homogenization tank. The homogenization tanks of these devices often have integrated heating features (e.g., heating jackets or internal heating tubes), directly heating the liquid within the tank during the homogenization process to regulate the material temperature.

[0042] The first step of the present invention is to mix algae oil and organic milk in proportion and perform preliminary emulsification under constant temperature conditions to form a primary mixed emulsion; The emulsification effect is best when the mass ratio of algae oil to organic milk is 1:8 to 1:12.

[0043] For example, the mass ratio of algae oil to organic milk is selected to be 1:10. At this time, the particle size distribution of the emulsion particles after emulsification is uniform and the stability is high.

[0044] At the same time, in order to ensure the adequacy of emulsification, the temperature of constant temperature emulsification is set at 35°C to 40°C, and the emulsification time is controlled between 15 and 25 minutes.

[0045] Experiments have shown that the emulsion achieves optimal homogeneity and stability when the temperature is 37°C and the emulsification time is 20 minutes. This step involves adding a predetermined ratio of algae oil and organic milk to a constant-temperature stirring device and mixing them using a mechanical stirrer at an appropriate speed until a uniform primary emulsion is formed.

[0046] The second step is to subject the initially mixed emulsion to ultra-high pressure homogenization to further improve the stability and fineness of the emulsion; When the homogenization pressure is 50MPa to 75MPa, the stability index of the emulsion is significantly improved. The homogenization pressure is selected to be 120MPa, the number of homogenizations is 3, and the homogenization time is 8 minutes each time. Under these conditions, the average particle size of the emulsion particles can be reduced to less than 0.5 microns, and the stratification phenomenon of the emulsion is almost completely eliminated. The operating process of this step is to import the initial mixed emulsion into the ultra-high pressure homogenizer, and homogenize it according to the set pressure and number of times to finally obtain a stable emulsion.

[0047] The third step is to add a modified adsorbent to the stable emulsion to adsorb impurities, thereby removing impurities from the emulsion and obtaining a purified emulsion; When the addition amount of the modified adsorbent is 0.5wt% to 1.5wt% of the total mass of the primary mixed emulsion, the impurity removal rate reaches a higher level.

[0048] The amount of modified adsorbent added is 1.0wt%, wherein the modified adsorbent is composed of activated carbon, silica gel and molecular sieve, and the mass ratio of the three is 2:1:1. This combination makes full use of the strong adsorption capacity of activated carbon, the selective adsorption characteristics of silica gel and the pore structure advantages of molecular sieve, thereby achieving effective removal of various impurities in the emulsion. In addition, the temperature of the adsorption process is set to 20°C to 25°C, and the adsorption time is controlled between 30 and 40 minutes. Experimental data show that when the adsorption temperature is 22°C and the adsorption time is 35 minutes, the impurity removal rate is the highest, and the purity of the emulsion is significantly improved. The specific operation of this step is to evenly disperse the modified adsorbent in the stable emulsion, then let it stand for adsorption under constant temperature conditions, and finally remove the adsorbent residue through a filtration device.

[0049] The fourth step is to perform low-temperature concentration and membrane separation on the purified emulsion to further improve the purity of the algae oil organic milk compound liquid; When the concentration temperature is between 40°C and 50°C, the purity of the compound liquid gradually increases with increasing temperature. The concentration temperature is selected to be 45°C and the concentration time is 25 minutes. Under these conditions, the water in the emulsion is effectively evaporated without destroying the active ingredients in the algae oil and organic milk. The subsequent membrane separation treatment uses a microfiltration membrane with a pore size of 0.05μm to 0.1μm to remove tiny particles and microorganisms that may remain in the emulsion. Experimental results show that when the membrane separation pore size is 0.08μm, the purity and transparency of the compound liquid reach the best state. The operation process of this step is to place the purified emulsion in a low-temperature concentration device for evaporation and concentration, and then filter it through a membrane separation device to finally obtain a high-purity algae oil-organic milk compound liquid.

[0050] The fifth step is to fill and sterilize the high-purity algae oil organic milk compound liquid at low temperature to ensure the safety and shelf life of the product.

[0051] Low-temperature sterilization is performed at 72°C for 18 minutes. This condition effectively kills pathogens and spoilage bacteria in the emulsion while maximizing the preservation of nutrients in the algal oil and organic milk. This step involves quantitatively filling the compounded liquid through aseptic filling equipment, then heating it in a low-temperature sterilizer, cooling it to room temperature, and sealing it for packaging.

[0052] The DHA-rich algae oil-derived organic milk compound system, obtained through the purification process, is not only highly pure and stable, but also rich in DHA and other nutrients beneficial to human health. Its main ingredients include algae oil, organic milk, and trace amounts of modified adsorbent residue. By rationally controlling the process parameters at each step, the final product meets consumer demand for high-quality dairy products.

[0053] In summary, the present invention successfully solves the problems of unstable emulsification and insufficient purity existing in the prior art through the scientific compounding of algae oil and organic milk and the development of an efficient purification process.

[0054] In the description of the present invention, the preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A highly efficient purification process for organic milk rich in DHA algae oil, characterized by: The purification process comprises the following steps: S1: algae oil and organic milk are mixed in proportion and preliminarily emulsified under constant temperature to obtain a premixed emulsion; S2: homogenizing the initially mixed emulsion through high pressure to form a stable emulsion; S3: adding a modified adsorbent to the stable emulsion to adsorb impurities to obtain a purified emulsion; S4: performing low-temperature concentration and membrane separation on the purified emulsion in sequence to obtain a high-purity algae oil organic milk composite liquid; S5: filling and low-temperature sterilizing the high-purity algae oil organic milk compound liquid in sequence.

2. The efficient purification process for organic milk rich in DHA algae oil according to claim 1, characterized in that: In step S1, the mass ratio of algae oil to organic milk is 1:8 to 1:

12.

3. The efficient purification process for organic milk rich in DHA algae oil according to claim 1, characterized in that: In the step S1, the constant temperature emulsification temperature is 35° C. to 40° C., and the emulsification time is 15 minutes to 25 minutes.

4. The efficient purification process for organic milk rich in DHA algae oil according to claim 1, characterized in that: In the step S2, the pressure of the high-pressure homogenization is 50 MPa to 75 MPa; the number of homogenizations is 2 to 4 times; and the homogenization time is 5 to 10 minutes.

5. The efficient purification process for organic milk rich in DHA algae oil according to claim 1, characterized in that: In step S3, the amount of the modified adsorbent added is 0.5 wt% to 1.5 wt% of the total mass of the primary mixed emulsion; the modified adsorbent is composed of activated carbon, silica gel and molecular sieve; the mass ratio of the activated carbon, silica gel and molecular sieve is 2 to 3:1 to 2:1 to 1.5; In step S3, the impurity adsorption temperature is 20° C. to 25° C., and the adsorption time is 30 minutes to 40 minutes.

6. The efficient purification process for organic milk rich in DHA algae oil according to claim 1, characterized in that: In the step S4, the temperature of the low-temperature concentration is 40° C. to 50° C., and the concentration time is 20 minutes to 30 minutes; and the pore size of the membrane separation is 0.05 μm to 0.1 μm.

7. The efficient purification process for organic milk rich in DHA algae oil according to claim 1, characterized in that: In step S5, the low-temperature sterilization temperature is 70° C. to 75° C., and the sterilization time is 15 minutes to 20 minutes.

8. The efficient purification process for organic milk rich in DHA algae oil according to any one of claims 1 to 7, characterized in that: This process is used to form an organic milk compound system rich in DHA algae oil.

9. The efficient purification process for organic milk rich in DHA algae oil according to claim 8, characterized in that: The composite system comprises algae oil, organic milk and a trace amount of modified adsorbent residue.

10. The process for efficiently purifying organic milk rich in DHA algae oil according to claim 1, further comprising a high-pressure homogenization device, characterized in that: The high-pressure homogenization equipment includes a composite tank body and a vacuum pump. A first homogenization temporary storage tank and a second homogenization temporary storage tank are connected to the composite tank body by a pipeline. A stirring device is provided on the composite tank body. The first homogenization temporary storage tank and the second homogenization temporary storage tank are both provided with a delivery pump and a heater. The delivery pump is used to deliver the liquid in the first homogenization temporary storage tank and the second homogenization temporary storage tank to the composite tank body. The first homogenization temporary storage tank and the second homogenization temporary storage tank are provided with normally open pressure relief valves; The pipes connecting the first homogenization temporary storage tank and the second homogenization temporary storage tank to the composite tank body are respectively provided with electromagnetic valves for controlling the circulation of liquid and air.

Images