Processing method of pure hippophae rhamnoides fruit original juice

Abstract

The invention relates to the technical field of food processing, in particular to a processing method of pure hippophae rhamnoides fruit juice, which comprises the following steps: S1, raw material treatment: selecting fresh hippophae rhamnoides fruits as a raw material, after the hippophae rhamnoides fruit peels are orange red and completely ripe, picking after 7 days of fruit bearing, cleaning, draining and freezing after picking, and then performing juicing treatment, so as to obtain fresh hippophae rhamnoides fruit juice; and filtering a product obtained by juicing to obtain a liquid material and a solid material respectively. In the preparation process of the pure hippophae rhamnoides fruit original juice, the hippophae rhamnoides fruits which continue to bear fruits after being ripe are selected as raw materials, and pectin and cellulose can be decomposed through cooperative treatment of pectinase, cellulase and beta-glucosidase in the process of preparing a solid material into a powder material; polysaccharide components in cell walls are released and converted into monosaccharide, and the purpose of improving the sweet taste of the original juice of the pure sea-buckthorn fruits without adding additional additives is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing, and particularly to a processing method of pure seabuckthorn fruit original juice. Background Art

[0002] Seabuckthorn juice is a drink made from seabuckthorn fruits. Seabuckthorn is rich in nutrients such as vitamin C, vitamin E, carotene, amino acids and various trace elements. It is a healthy drink with rich nutrition and unique flavor, and is deeply loved by consumers.

[0003] In the prior art, although the pure seabuckthorn fruit original juice made from a single raw material is rich in nutrients, due to the relatively high content of tannins and organic acids in seabuckthorn fruits, the prepared juice will have a bitter taste, which affects the drinking taste of the pure seabuckthorn fruit original juice. Based on this, the present invention provides a processing method of pure seabuckthorn fruit original juice. Summary of the Invention

[0004] The purpose of the present invention is to provide a processing method of pure seabuckthorn fruit original juice. The pure seabuckthorn fruit original juice prepared by the present invention not only has a relatively high dietary fiber content, but also has an excellent taste score.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a processing method of pure seabuckthorn fruit original juice, including the following steps:

[0007] S1: Raw material treatment. Select fresh seabuckthorn fruits as raw materials. After the outer skin of the seabuckthorn fruits turns orange-red and is fully mature, wait for 7 days after fruiting and then pick. After picking, carry out cleaning, water draining, and freezing treatments, and then carry out juice extraction treatment. The product obtained from juice extraction is subjected to filtration treatment to respectively obtain a liquid material and a solid material;

[0008] S2: Liquid material treatment. Carry out adsorption and deacidification treatments on the liquid material to obtain juice for later use;

[0009] S3: Solid material treatment. Carry out treatment on the solid material to obtain a powder material for later use;

[0010] S4: Mixing and preparation. Mix the juice and the powder material to prepare the pure seabuckthorn fruit original juice.

[0011] Further, the method for raw material treatment is as follows: After the seabuckthorn fruits are picked, immerse them in clean water and soak for 2 - 4 hours. After soaking, carry out rinsing treatment and drain the surface water, place them in a ventilated place and let them stand for 2 - 4 hours, and then under the condition of -20°C, carry out freezing treatment for 12 - 24 hours. After the freezing treatment, carry out natural thawing and then carry out juice extraction treatment to respectively obtain a liquid material and a solid material.

[0012] Further, the method for treating the liquid material is as follows: The liquid material is added into a mixer, and food-grade activated carbon is added into the mixer. Under the condition of 30°C, stirring is carried out at 200 - 300 r / min for 20 - 30 min. After the stirring treatment is completed, the product obtained by stirring is filtered to remove the food-grade activated carbon, and the adsorption treatment of the liquid material is completed. Among them, the mass of the food-grade activated carbon is 0.1 - 0.3% of the mass of the liquid material.

[0013] Further, the method for treating the liquid material is as follows: The liquid material that has completed the adsorption treatment is added into a mixer, and resin particles are added into the mixer. The mixer is set to stir at 40 - 60 r / min for 30 - 40 min. After the stirring treatment is completed, it is left standing for 10 - 20 min. The obtained product is added into a centrifuge, and the centrifuge is set to centrifuge at 3000 - 4000 r / min for 6 - 10 min. The supernatant is taken from the product obtained by centrifugation, and the liquid material treatment is completed to obtain fruit juice. Among them, the mass of the resin particles is 4 - 6% of the mass of the liquid material that has completed the adsorption treatment.

[0014] Further, the resin particles are prepared by the following method: After the anion exchange resin and the sodium hydroxide solution are mixed evenly, they are left standing for reaction for 10 - 20 min, and then rinsed with deionized water until the pH is neutral.

[0015] Further, the mass ratio of the anion exchange resin to the sodium hydroxide solution is 1:0.08 - 0.12, and the mass concentration of the sodium hydroxide solution is 3 - 5%.

[0016] Further, the method for treating the solid material is as follows: The solid material is sent into an oven, and the oven is set to dry at 50 - 60°C for 4 - 6 h. After the drying treatment, grinding is carried out, and the grinding particle size is 20 - 60 μm to obtain a coarse material. The coarse material and water are added into a mixer, and the mixer is set to stir at 200 - 300 r / min for 10 - 20 min. After the stirring treatment is completed, pectinase is added into the mixer, the set temperature is 44 - 46°C, and the rotation speed is 80 - 120 r / min for stirring treatment for 50 - 60 min. Then it is left standing for 10 - 20 min. Cellulase and β-glucosidase are added into the mixer, the set temperature is 52 - 54°C, and the rotation speed is 120 - 140 r / min for stirring treatment for 2 - 3 h. The obtained product is inactivated at 80 - 90°C for 10 min, and the obtained product is sent into an oven, and the oven is set to dry at 50 - 60°C for 4 - 6 h to obtain a powder material.

[0017] Further, the mass ratio of the coarse material to water is 1:(2 - 3), the mass of the pectinase is 0.1 - 0.2% of the mass of the coarse material, the mass of the cellulase is 0.06 - 0.08% of the mass of the coarse material, and the mass of the β-glucosidase is 0.04 - 0.06% of the mass of the coarse material.

[0018] Further, the method for hybrid preparation is as follows: Take 6-10% by mass of fruit juice and add it to a mixer. After evenly dispersing the powder material, add it to the mixer. Set the mixer to stir at 200-300 r / min for 20-30 min. Then add the remaining fruit juice to the mixer. Set the mixer to stir at 400-500 r / min for 20-30 min. Add the obtained product to a high-pressure homogenizer, set it at 15-20 MPa, and process for 10-20 min. Add citric acid to the obtained product to adjust the pH value to 3.2-3.4. Then perform sterilization and filling treatments to obtain the pure seabuckthorn fruit original juice.

[0019] In a second aspect, the present invention also provides a pure seabuckthorn fruit original juice, which is prepared by a processing method of a pure seabuckthorn fruit original juice.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. In the present invention, during the preparation of the pure seabuckthorn fruit original juice, by selecting seabuckthorn fruits that continue to bear fruit after ripening as raw materials, continuous fruiting after ripening can promote the conversion of starch into fructose and increase the sugar content of seabuckthorn fruits. Through the freezing treatment before juicing the seabuckthorn fruits, the cell walls can be damaged by low temperature to promote the release of sugars in the pulp. Through the treatment of the solid material obtained by juicing and adding it to the fruit juice, during the process of preparing the solid material into powder, through the synergistic treatment of pectinase, cellulase, and β-glucosidase, pectin and cellulose can be decomposed, and the polysaccharide components in the cell walls are released and converted into monosaccharides, achieving the purpose of enhancing the sweet taste of the pure seabuckthorn fruit original juice without adding extra additives.

[0022] 2. In the present invention, through the treatment of the liquid material, after the adsorption treatment with food-grade activated carbon, the tannin components that bring a bitter taste in the seabuckthorn fruits can be adsorbed. After the deacidification treatment with resin particles, the organic acid components in the seabuckthorn fruits can be adsorbed, reducing the sour and astringent taste of the fruit juice, making the sweet taste of the fruit juice more prominent, and effectively improving the drinking taste of the pure seabuckthorn fruit original juice.

[0023] 3. In the present invention, the pure seabuckthorn fruit original juice is prepared by the synergistic use of the liquid material and the solid material obtained by juicing. The solid material is the fruit residue obtained by filtration. After treatment, it is combined and prepared. After the fruit residue is treated and added, it is converted into fiber powder rich in dietary fiber. Compared with the fruit juice directly obtained by filtration, the pure seabuckthorn fruit original juice has a higher dietary fiber content and is more nutritious. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flowchart of a processing method for a pure seabuckthorn fruit original juice proposed by the invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Among them, it should be noted that the raw materials used in the following embodiments are all commercially available raw materials.

[0027] Embodiment 1:

[0028] S1: Raw material treatment. Select fresh sea buckthorn fruits as raw materials. After the outer skin of the sea buckthorn fruits turns orange-red and is completely mature, wait for 7 days after fruiting and then pick. After picking, perform cleaning, draining, and freezing treatments, and then perform juicing treatment. The product obtained by juicing is filtered to obtain a liquid material and a solid material respectively;

[0029] The method of raw material treatment is as follows: After the sea buckthorn fruits are picked, immerse them in clean water for 2 hours. After the immersion is completed, perform rinsing treatment and drain the surface water. Place them in a ventilated place and let them stand for 2 hours. Then, under the condition of -20°C, perform freezing treatment for 12 hours. After the freezing treatment is completed, perform natural thawing and then perform juicing treatment to obtain a liquid material and a solid material respectively;

[0030] S2: Liquid material treatment. Perform adsorption and deacidification treatments on the liquid material to obtain fruit juice for later use;

[0031] The method of liquid material treatment is as follows: Add the liquid material to a mixer, add food-grade activated carbon to the mixer, and under the condition of 30°C, set the stirring speed to 200 r / min and stir for 20 minutes. After the stirring treatment is completed, filter the product obtained by stirring to remove the food-grade activated carbon to complete the adsorption treatment of the liquid material. Among them, the mass of the food-grade activated carbon is 0.1% of the mass of the liquid material. Add the liquid material after the adsorption treatment to a mixer, add resin particles to the mixer, set the mixer to stir at 40 r / min for 30 minutes. After the stirring treatment is completed, let it stand for 10 minutes. Add the obtained product to a centrifuge, set the centrifuge to centrifuge at 3000 r / min for 6 minutes, and take the supernatant of the product obtained by centrifugation to complete the liquid material treatment to obtain fruit juice. Among them, the mass of the resin particles is 4% of the mass of the liquid material after the adsorption treatment;

[0032] The resin particles are prepared by the following method: Mix the anion exchange resin with a sodium hydroxide solution, let it stand and react for 10 minutes, and then rinse with deionized water until the pH is neutral. Among them, the mass ratio of the anion exchange resin to the sodium hydroxide solution is 1:0.08, and the mass concentration of the sodium hydroxide solution is 3%;

[0033] S3: Solid material treatment: Treat the solid material to obtain powder for later use.

[0034] The method of solid material treatment is as follows: Feed the solid material into an oven, set the oven at 50 °C for drying treatment for 4 h. After drying treatment, conduct grinding treatment with a grinding particle size of 20 μm to obtain coarse material. Add the coarse material and water into a mixer, set the mixer at 200 r / min for stirring treatment for 10 min. After completing the stirring treatment, add pectinase into the mixer, set the temperature at 44 °C, and stir at a speed of 80 r / min for 50 min. Then let it stand for 10 min. Add cellulase and β-glucosidase into the mixer, set the temperature at 52 °C, and stir at a speed of 120 r / min for 2 h. Inactivate the obtained product at 80 °C for 10 min. Feed the obtained product into an oven, set the oven at 50 °C for drying treatment for 4 h to obtain powder. Among them, the mass ratio of the coarse material to water is 1:2, the mass of pectinase is 0.1% of the mass of the coarse material, the mass of cellulase is 0.06% of the mass of the coarse material, and the mass of β-glucosidase is 0.04% of the mass of the coarse material.

[0035] S4: Mixing and preparation: Mix the fruit juice and the powder to prepare pure seabuckthorn fruit original juice.

[0036] The method of mixing and preparation is as follows: Take 6% of the fruit juice by mass and add it into a mixer. After evenly dispersing the powder, add it into the mixer. Set the mixer at 200 r / min for stirring treatment for 20 min. Then add the remaining fruit juice into the mixer. Set the mixer at 400 r / min for stirring treatment for 20 min. Add the obtained product into a high-pressure homogenizer, set it at 15 MPa for treatment for 10 min. Add citric acid into the obtained product to adjust the pH value to 3.2. Then conduct sterilization and filling treatments to obtain pure seabuckthorn fruit original juice.

[0037] Example 2:

[0038] S1: Raw material treatment: Select fresh seabuckthorn fruits as raw materials. After the outer skin of the seabuckthorn fruits turns orange-red and is fully mature, wait for 7 d after fruiting and then pick. After picking, conduct cleaning, draining, and freezing treatments, and then conduct juice extraction treatment. Filter the obtained product from juice extraction to obtain liquid material and solid material respectively.

[0039] The method of raw material treatment is as follows: Immerse the picked seabuckthorn fruits in clean water for 3 h. After completing the immersion, conduct rinsing treatment and drain the surface water. Place them in a ventilated place and let them stand for 3 h. Then, under the condition of -20 °C, conduct freezing treatment for 18 h. After completing the freezing treatment, conduct natural thawing and then conduct juice extraction treatment to obtain liquid material and solid material respectively.

[0040] S2: Liquid material treatment: Conduct adsorption and deacidification treatments on the liquid material to obtain fruit juice for later use.

[0041] The method for treating the liquid material is as follows: The liquid material is added into a mixer, and food-grade activated carbon is added to the mixer. Under the condition of 30°C, stirring is carried out at 250 r / min for 25 min. After the stirring treatment is completed, the product obtained by stirring is filtered to remove the food-grade activated carbon, and the adsorption treatment of the liquid material is completed. Among them, the mass of the food-grade activated carbon is 0.2% of the mass of the liquid material. The liquid material after the adsorption treatment is added into the mixer, and resin particles are added to the mixer. The mixer is set to stir at 50 r / min for 35 min. After the stirring treatment is completed, it is left standing for 15 min. The obtained product is added into a centrifuge, and the centrifuge is set to centrifuge at 3500 r / min for 8 min. The supernatant is taken from the product obtained by centrifugation, and the liquid material treatment is completed to obtain fruit juice. Among them, the mass of the resin particles is 5% of the mass of the liquid material after the adsorption treatment;

[0042] The resin particles are prepared by the following method: The anion exchange resin and the sodium hydroxide solution are mixed evenly and then left standing for reaction for 15 min. After that, it is rinsed with deionized water until the pH is neutral. Among them, the mass ratio of the anion exchange resin to the sodium hydroxide solution is 1:0.1, and the mass concentration of the sodium hydroxide solution is 4%;

[0043] S3: Solid material treatment, the solid material is treated to obtain a powder for later use;

[0044] The method for treating the solid material is as follows: The solid material is fed into an oven, and the oven is set to dry at 55°C for 5 h. After the drying treatment, grinding is carried out, and the grinding particle size is 40 μm to obtain a coarse material. The coarse material and water are added into a mixer, and the mixer is set to stir at 250 r / min for 15 min. After the stirring treatment is completed, pectinase is added to the mixer, the set temperature is 45°C, and the rotation speed is 100 r / min for stirring treatment for 55 min. Then it is left standing for 15 min. Cellulase and β-glucosidase are added to the mixer, the set temperature is 53°C, and the rotation speed is 130 r / min for stirring treatment for 2.5 h. The obtained product is inactivated at 85°C for 10 min. The obtained product is fed into an oven, and the oven is set to dry at 55°C for 5 h to prepare the powder. Among them, the mass ratio of the coarse material to water is 1:2.5, the mass of the pectinase is 0.15% of the mass of the coarse material, the mass of the cellulase is 0.07% of the mass of the coarse material, and the mass of the β-glucosidase is 0.05% of the mass of the coarse material;

[0045] S4: Mixing and preparation, the fruit juice and the powder are mixed and prepared to obtain pure seabuckthorn fruit original juice;

[0046] The method of mixed preparation is as follows: Take 8% by mass of fruit juice and add it to a mixer. After evenly dispersing the powder material, add it to the mixer. The mixer is set to stir at 250 r / min for 25 min. Then add the remaining fruit juice to the mixer, and the mixer is set to stir at 450 r / min for 25 min. The obtained product is added to a high-pressure homogenizer, set at 17 MPa, and processed for 15 min. Citric acid is added to the obtained product to adjust the pH value to 3.3. Then, sterilization and filling treatments are carried out to obtain pure seabuckthorn fruit original juice.

[0047] Example 3:

[0048] S1: Raw material treatment. Select fresh seabuckthorn fruits as raw materials. After the outer skin of the seabuckthorn fruits turns orange-red and is completely ripe, wait for 7 days after fruiting and then pick. After picking, carry out cleaning, draining, and freezing treatments, and then carry out juicing treatment. The product obtained from juicing is subjected to filtration treatment to separately obtain a liquid material and a solid material;

[0049] The method of raw material treatment is as follows: After picking, immerse the seabuckthorn fruits in clean water for 4 h. After completion of soaking, carry out rinsing treatment and drain the surface water. Place them in a ventilated place and let them stand for 4 h. Then, under the condition of -20 °C, carry out freezing treatment for 24 h. After completion of freezing treatment, carry out natural thawing and then carry out juicing treatment to separately obtain a liquid material and a solid material;

[0050] S2: Liquid material treatment. Carry out adsorption and deacidification treatments on the liquid material to obtain fruit juice for standby;

[0051] The method of liquid material treatment is as follows: Add the liquid material to a mixer, add food-grade activated carbon to the mixer, and under the condition of 30 °C, set the mixer to stir at 300 r / min for 30 min. After completion of stirring treatment, filter the stirred product to remove the food-grade activated carbon to complete the adsorption treatment of the liquid material. Among them, the mass of the food-grade activated carbon is 0.3% of the mass of the liquid material. Add the liquid material after completion of adsorption treatment to the mixer, add resin particles to the mixer, and set the mixer to stir at 60 r / min for 40 min. After completion of stirring treatment, let it stand for 20 min. The obtained product is added to a centrifuge, and the centrifuge is set to centrifuge at 4000 r / min for 10 min. Take the supernatant of the centrifuged product to complete the liquid material treatment and obtain fruit juice. Among them, the mass of the resin particles is 6% of the mass of the liquid material after completion of adsorption treatment;

[0052] The resin particles are prepared by the following method: Mix the anion exchange resin and sodium hydroxide solution, let it stand and react for 20 min, and then rinse with deionized water until the pH is neutral. Among them, the mass ratio of the anion exchange resin to the sodium hydroxide solution is 1:0.12, and the mass concentration of the sodium hydroxide solution is 5%;

[0053] S3: Solid material treatment. Carry out treatment on the solid material to obtain powder material for standby;

[0054] The method for treating solid materials is as follows: The solid materials are fed into an oven, and the oven is set to 60 °C for drying treatment for 6 h. After the drying treatment, grinding treatment is carried out, and the grinding particle size is 60 μm to obtain coarse materials. The coarse materials and water are added to a mixer, and the mixer is set to stir at 300 r / min for 20 min. After the stirring treatment is completed, pectinase is added to the mixer, the set temperature is 46 °C, and the stirring treatment is carried out at 120 r / min for 60 min. Then, it is left standing for 20 min. Cellulase and β-glucosidase are added to the mixer, the set temperature is 54 °C, and the stirring treatment is carried out at 140 r / min for 3 h. The obtained product is inactivated at 90 °C for 10 min. The obtained product is fed into an oven, and the oven is set to 60 °C for drying treatment for 6 h to obtain powder materials. Among them, the mass ratio of the coarse materials to water is 1:3, the mass of pectinase is 0.2% of the mass of the coarse materials, the mass of cellulase is 0.08% of the mass of the coarse materials, and the mass of β-glucosidase is 0.06% of the mass of the coarse materials;

[0055] S4: Mixing and preparation. The fruit juice and the powder materials are mixed and prepared to obtain pure seabuckthorn fruit original juice;

[0056] The method for mixing and preparation is as follows: Take 10% of the mass of the fruit juice and add it to a mixer. After evenly dispersing the powder materials, add them to the mixer. The mixer is set to stir at 300 r / min for 30 min. Then, add the remaining fruit juice to the mixer. The mixer is set to stir at 500 r / min for 30 min. The obtained product is added to a high-pressure homogenizer, set at 20 MPa, and treated for 20 min. Citric acid is added to the obtained product to adjust the pH value to 3.4. Then, sterilization and filling treatments are carried out to obtain pure seabuckthorn fruit original juice.

[0057] Comparative example 1. The difference between this comparative example and Example 1 is that: In this comparative example, an equal amount of liquid materials is selected to replace the fruit juice.

[0058] Comparative example 2. The difference between this comparative example and Example 1 is that: In this comparative example, an equal amount of coarse materials is selected to replace the powder materials.

[0059] Comparative example 3. The difference between this comparative example and Example 1 is that: In this comparative example, the liquid materials obtained in S1 are subjected to sterilization and filling treatments to obtain pure seabuckthorn fruit original juice.

[0060] Comparative example 4. The difference between this comparative example and Example 1 is that: In this comparative example, the liquid materials obtained in S1 are subjected to sterilization and filling treatments to obtain pure seabuckthorn fruit original juice (directly picked when ripe).

[0061] Performance test: Performance tests were conducted on the pure seabuckthorn fruit original juice prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3, and Comparative Example 4. The test data obtained were recorded in the following table:

[0062]

[0063] In the performance test, the test method for dietary fiber content was as follows: Using the test method in GB 5009.88-2023, the dietary fiber content of the pure seabuckthorn fruit original juice prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3, and Comparative Example 4 was tested respectively;

[0064] The test method for the taste score of users was as follows: For the pure seabuckthorn fruit original juice prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3, and Comparative Example 4, multiple batches of test users were selected for taste scoring. Each batch of users consisted of 160 people, including an equal proportion of young men / women, middle-aged men / women, and elderly men / women. After drinking the pure seabuckthorn fruit original juice, the users scored the taste of the pure seabuckthorn fruit original juice. The scoring standard was whether the taste of the pure seabuckthorn fruit original juice was sour, bitter, or relatively sweet and easy to drink. The scoring range was from 1 to 9 points, where 1 point represented the worst taste and 9 points represented the best taste. The scores of each batch of users were collected and the average value was calculated to complete the test of the taste score of users.

[0065] It can be seen that the dietary fiber content and taste score of the pure seabuckthorn fruit original juice prepared in Comparative Example 1, 2, 3, and 4 were lower than those in Example 1, 2, and 3; this shows that: in the preparation process of the pure seabuckthorn fruit original juice, by selecting seabuckthorn fruits that continue to hang on the tree after ripening as raw materials, hanging on the tree after ripening can promote the conversion of starch into fructose and increase the sugar content of seabuckthorn fruits. Through the freezing treatment before juicing the seabuckthorn fruits, the low temperature can be used to damage the cell walls and promote the release of sugars in the pulp. By treating the solid materials obtained from juicing and adding them to the juice, during the process of preparing the solid materials into powders, through the synergistic treatment of pectinase, cellulase, and β-glucosidase, pectin and cellulose can be decomposed, and the polysaccharide components in the cell walls can be released and converted into monosaccharides, achieving the purpose of enhancing the sweet taste of the pure seabuckthorn fruit original juice without adding extra additives;

[0066] By treating the liquid materials and performing adsorption treatment with food-grade activated carbon, the tannin components that bring a bitter taste in seabuckthorn fruits can be adsorbed. After performing deacidification treatment with resin particles, the organic acid components in seabuckthorn fruits can be adsorbed, reducing the sour taste of the juice and making the sweet taste of the juice more prominent, effectively improving the drinking taste of the pure seabuckthorn fruit original juice;

[0067] The original pure fruit juice of seabuckthorn is prepared by making synergistic use of the liquid and solid materials obtained from juicing. The solid material is the pomace obtained by filtration. After being processed, it is combined and prepared. After the pomace is processed and added, it is converted into fiber powder rich in dietary fiber. Compared with the juice directly obtained by filtration, the original pure fruit juice of seabuckthorn has a higher content of dietary fiber and is more nutritious.

[0068] By comparing and analyzing the relevant data in the table, it can be seen that the original pure fruit juice of seabuckthorn prepared by the present invention not only has a high content of dietary fiber, but also has an excellent taste score. This shows that the original pure fruit juice of seabuckthorn provided by the present invention has a broader market prospect and is more suitable for promotion.

[0069] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0070] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not elaborate on all details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A processing method of pure sea buckthorn fruit juice, characterized in that: It includes the following steps: S1: Raw material treatment. Select fresh seabuckthorn fruits as raw materials. After the outer skin of the seabuckthorn fruits turns orange-red and is completely ripe, wait for 7 days after fruiting and then pick. After picking, carry out cleaning, draining, and freezing treatments, and then carry out juice extraction treatment. The product obtained from juice extraction is subjected to filtration treatment to obtain liquid material and solid material respectively; S2: Liquid material treatment. Carry out adsorption and deacidification treatments on the liquid material to obtain fruit juice for standby; S3: Solid material treatment. Carry out treatment on the solid material to obtain powder for standby; S4: Mixing and preparation. Mix the fruit juice and the powder to prepare pure seabuckthorn fruit original juice.

2. The processing method of the pure seabuckthorn fruit original juice according to claim 1, wherein, The method of the raw material treatment is as follows: After the seabuckthorn fruits are picked, immerse them in clean water and soak for 2 - 4 hours. After the soaking is completed, carry out rinsing treatment and drain the surface water, place them in a ventilated place and let them stand for 2 - 4 hours. Then, under the condition of -20°C, carry out freezing treatment for 12 - 24 hours. After the freezing treatment is completed, carry out natural thawing and then carry out juice extraction treatment to obtain liquid material and solid material respectively.

3. The processing method of the pure seabuckthorn fruit juice according to claim 1, characterized in that, The method of the liquid material treatment is as follows: Add the liquid material into a mixer, add food-grade activated carbon into the mixer, under the condition of 30°C, set the stirring speed at 200 - 300 r / min and stir for 20 - 30 minutes. After the stirring treatment is completed, filter the product obtained from stirring to remove the food-grade activated carbon to complete the adsorption treatment of the liquid material. Among them, the mass of the food-grade activated carbon is 0.1 - 0.3% of the mass of the liquid material.

4. The processing method of the pure seabuckthorn fruit original juice according to claim 3, characterized in that The method of the liquid material treatment is as follows: Add the liquid material after the adsorption treatment into a mixer, add resin particles into the mixer, set the mixer at 40 - 60 r / min and stir for 30 - 40 minutes. After the stirring treatment is completed, let it stand for 10 - 20 minutes. Add the obtained product into a centrifuge, set the centrifuge at 3000 - 4000 r / min and carry out centrifugation treatment for 6 - 10 minutes. Take the supernatant of the product obtained from centrifugation to complete the liquid material treatment and obtain fruit juice. Among them, the mass of the resin particles is 4 - 6% of the mass of the liquid material after the adsorption treatment is completed.

5. The processing method of the pure seabuckthorn fruit original juice according to claim 4, characterized in that, The resin particles are prepared by the following method: Mix the anion exchange resin and the sodium hydroxide solution, let it stand and react for 10 - 20 minutes, and then rinse with deionized water until the pH is neutral.

6. The processing method of the pure seabuckthorn fruit original juice according to claim 5, characterized in that, The mass ratio of the anion exchange resin to the sodium hydroxide solution is 1:0.08 - 0.12, and the mass concentration of the sodium hydroxide solution is 3 - 5%.

7. The processing method of the pure seabuckthorn fruit original juice according to claim 1, characterized in that, The method for treating solid materials is as follows: The solid materials are fed into an oven, and the oven is set at 50 - 60 °C for drying treatment for 4 - 6 h. After the drying treatment, grinding is carried out, and the grinding particle size is 20 - 60 μm to obtain coarse materials. The coarse materials and water are added into a mixer, and the mixer is set at 200 - 300 r / min for stirring treatment for 10 - 20 min. After the stirring treatment is completed, pectinase is added into the mixer, the set temperature is 44 - 46 °C, and the stirring treatment is carried out at a rotation speed of 80 - 120 r / min for 50 - 60 min. Then, it is left standing for 10 - 20 min. Cellulase and β-glucosidase are added into the mixer, the set temperature is 52 - 54 °C, and the stirring treatment is carried out at a rotation speed of 120 - 140 r / min for 2 - 3 h. The obtained product is inactivated at 80 - 90 °C for 10 min, and the obtained product is fed into an oven, and the oven is set at 50 - 60 °C for drying treatment for 4 - 6 h to obtain powdered materials.

8. The processing method of the pure sea buckthorn fruit original juice according to claim 7, characterized in that, The mass ratio of the coarse materials to water is 1:(2 - 3), the mass of pectinase is 0.1 - 0.2% of the mass of the coarse materials, the mass of cellulase is 0.06 - 0.08% of the mass of the coarse materials, and the mass of β-glucosidase is 0.04 - 0.06% of the mass of the coarse materials.

9. The processing method of the pure seabuckthorn fruit juice according to claim 1, characterized in that, The method for mixing and preparing is as follows: Take 6 - 10% of the juice by mass and add it into a mixer. After uniformly dispersing the powdered materials, add them into the mixer. The mixer is set at 200 - 300 r / min for stirring treatment for 20 - 30 min. Then, add the remaining juice into the mixer. The mixer is set at 400 - 500 r / min for stirring treatment for 20 - 30 min. The obtained product is added into a high-pressure homogenizer, set at 15 - 20 MPa, and treated for 10 - 20 min. Citric acid is added into the obtained product to adjust the pH value to 3.2 - 3.

4. Then, sterilization and filling treatments are carried out to obtain pure seabuckthorn fruit original juice.

10. A pure sea buckthorn fruit original juice, characterized in that, It is prepared by the processing method of a pure seabuckthorn fruit original juice according to any one of claims 1 - 9.

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