Vacuum ultrafiltration method for efficiently extracting white birch juice

Abstract

The invention relates to the technical field of food processing and plant extraction, and discloses a vacuum ultrafiltration method for efficiently extracting white birch sap, which specifically comprises the following steps: 1, cleaning treatment: selecting proper white birches for cleaning barks; 2, drilling treatment: drilling holes in the cleaned trunk to facilitate subsequent installation of a vacuum ultrafiltration device; 3, mounting a vacuum ultrafiltration device: mounting the vacuum ultrafiltration device at the drilling hole of the silver birch; according to the present invention, with the accurately controlled vacuum ultrafiltration technology, the nutritional components in the birch sap can be effectively retained, the impurities and the microorganisms can be removed, the purity and the safety of the birch sap can be ensured, the harm to the silver birch is less, the sustainable collection is easily achieved, the extraction efficiency of the silver birch sap can be effectively improved, and the quality of the extracted sap can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of food processing and plant extraction, in particular to a vacuum ultrafiltration method for efficiently extracting birch sap. Background Art

[0002] Birch sap, also known as birch sap or birch juice, is a colorless or slightly yellowish transparent liquid extracted from birch trees. It is called "magic tree water" because it contains a variety of nutrients needed by the human body. Birch sap has unique medicinal and drinking value, so it is widely used in medicine, food and beverage (health product development), cosmetics and other fields. It has a long history and is quite famous. As pharmaceutical products, health products, beverages and cosmetics made from birch sap are becoming increasingly popular internationally, relevant Chinese departments have also increased the development and utilization of birch sap in recent years, making it a product raw material with great potential value in the Chinese market.

[0003] Traditional methods of extracting birch sap generally include manual collection and mechanical collection. The manual collection method is simple, but inefficient and can easily cause damage to trees. Although mechanical collection improves efficiency, it has high requirements for equipment and also has the potential to damage trees. In addition, traditional methods make it difficult to control the mixing of impurities during the extraction process, resulting in uneven quality of birch sap and failure to meet the needs of the high-end market.

[0004] Therefore, we proposed a vacuum ultrafiltration method for efficient extraction of birch sap. Summary of the invention

[0005] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a vacuum ultrafiltration method for efficiently extracting birch sap.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme, a vacuum ultrafiltration method for efficiently extracting birch sap, which specifically comprises the following steps:

[0007] Step 1: Cleaning: Select appropriate birch trees for bark cleaning;

[0008] Step 2: Drilling: Drill holes on the cleaned tree trunk to facilitate the subsequent installation of the vacuum ultrafiltration device;

[0009] Step 3: Installation of vacuum ultrafiltration device: Install the vacuum ultrafiltration device at the hole drilled in the birch tree;

[0010] Step 4: Birch sap extraction: The vacuum pump on the vacuum ultrafiltration device generates negative pressure to force the birch sap to be filtered through the ultrafiltration membrane on the vacuum ultrafiltration device to ensure that the effective ingredients in the birch sap are retained while removing impurities and waste liquid;

[0011] Step 5: Parameter monitoring and adjustment: Real-time monitoring and adjustment of the parameters during the ultrafiltration process to ensure the stability and efficiency of the extraction process;

[0012] Step 6: Waste liquid treatment: Treat the waste liquid generated during the extraction process to reduce the impact on the environment;

[0013] Step 7: Concentration and purification: The birch sap filtered through the ultrafiltration membrane is subsequently concentrated and purified to improve its quality and shelf life;

[0014] Step 8: Quality testing: Conduct quality testing on the extracted birch sap to ensure it meets food safety standards;

[0015] Step 9: Packaging and storage: The extracted birch sap is sealed and stored to ensure its freshness and safety during transportation and sales.

[0016] Preferably, the cleaning process in the first step includes flushing the bark with sterile water to remove dust and microorganisms on the surface. During the flushing process, the water flow should be gentle to avoid damaging the bark. After the cleaning process, the bark surface should be allowed to dry naturally or gently wiped with a sterile cloth to ensure that there is no residual moisture on the bark surface. This can reduce the pollution that may be introduced during the drilling process and ensure the purity of the extracted birch sap.

[0017] Preferably, the drilling process in the second step includes drilling with a drill bit of suitable diameter to ensure that the ultrafiltration device can be stably installed, the drilling depth should be moderate to avoid damaging the growth layer of the tree, and at the same time ensure that the pore size matches the interface of the ultrafiltration device to facilitate subsequent sealing and fixation. After drilling, the remaining wood chips and dust in the hole should be cleaned to prevent these impurities from entering the ultrafiltration device and affecting the quality of birch sap.

[0018] Preferably, the vacuum ultrafiltration device in the third step includes a vacuum pump and an ultrafiltration membrane. During installation, it should be ensured that the ultrafiltration membrane and the drilled hole in the tree trunk are well sealed to prevent air leakage and ensure the vacuum degree of the extraction process.

[0019] Preferably, the parameters in the fifth step are specifically vacuum degree, temperature and flow rate. The vacuum degree is controlled at 0.01 MPa to 0.09 MPa to ensure the efficiency of the ultrafiltration process and the quality of the birch sap. The temperature is controlled at 10° C. to 30° C. to prevent the birch sap from deteriorating during the ultrafiltration process and also to help increase the ultrafiltration rate. The flow rate is controlled at 100 to 500 ml / min to ensure the continuity and stability of the ultrafiltration process to avoid clogging of the ultrafiltration membrane or excessive dilution of the birch sap.

[0020] Preferably, the waste liquid treatment in the sixth step specifically includes collecting the waste liquid and converting it into harmless substances through biodegradation or chemical treatment to reduce pollution to the environment.

[0021] Preferably, the specific method of the concentration and purification treatment in the seventh step includes further concentrating the birch sap using reverse osmosis technology or evaporation concentration technology, and then purifying it by ion exchange or activated carbon adsorption to remove possible trace impurities and ensure the purity and taste of the final product.

[0022] The present invention provides a vacuum ultrafiltration method for efficiently extracting birch sap, which has the following beneficial effects:

[0023] 1. A vacuum ultrafiltration method for efficiently extracting birch sap can effectively retain the nutrients in the birch sap through precisely controlled vacuum ultrafiltration technology, while removing impurities and microorganisms, ensuring the purity and safety of the birch sap. This method causes less damage to birch trees, is conducive to sustainable collection, can effectively improve the extraction efficiency of birch sap, and at the same time ensure the quality of the extracted sap.

[0024] 2. This vacuum ultrafiltration method for efficiently extracting birch sap can ensure the stability and efficiency of the extraction process and increase the yield of birch sap by real-time monitoring and adjusting the parameters in the ultrafiltration process.

[0025] 3. This vacuum ultrafiltration method for efficiently extracting birch sap not only reduces environmental pollution through waste liquid treatment and quality testing steps, but also ensures that the quality of the final product meets food safety standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0027] Embodiment 1: A vacuum ultrafiltration method for efficiently extracting birch sap, such as Figure 1As shown, the method specifically includes the following steps: the first step: cleaning treatment: selecting suitable birch trees for bark cleaning treatment; the second step: drilling treatment: drilling holes on the cleaned trunks to facilitate the subsequent installation of vacuum ultrafiltration devices; the third step: vacuum ultrafiltration device installation: installing vacuum ultrafiltration devices at the drilled holes of the birch trees; the fourth step: birch sap extraction: negative pressure is generated by the vacuum pump on the vacuum ultrafiltration device to force the birch sap to be filtered through the ultrafiltration membrane on the vacuum ultrafiltration device to ensure that the effective ingredients in the birch sap are retained while removing impurities and waste liquid; the fifth step: Data monitoring and adjustment: real-time monitoring and adjustment of the parameters in the ultrafiltration process to ensure the stability and efficiency of the extraction process; Step 6: Waste liquid treatment: treatment of waste liquid generated during the extraction process to reduce the impact on the environment; Step 7: Concentration and purification: subsequent concentration and purification of birch sap after ultrafiltration membrane filtration to improve its quality and shelf life; Step 8: Quality inspection: quality inspection of the extracted birch sap to ensure that it meets food safety standards; Step 9: Packaging and storage: sealed packaging and storage of the extracted birch sap , to ensure its freshness and safety during transportation and sales. The first step of cleaning includes rinsing the bark with sterile water to remove dust and microorganisms on the surface. During the rinsing process, the water flow should be gentle to avoid damage to the bark. After cleaning, the bark surface should be allowed to dry naturally or wiped gently with a sterile cloth to ensure that there is no residual moisture on the bark surface. This can reduce the pollution that may be introduced during the drilling process and ensure the purity of the extracted birch sap. The second step of drilling includes drilling with a drill bit of appropriate diameter to ensure the ultrafiltration device The device can be stably installed. The drilling depth should be moderate to avoid damaging the growth layer of the tree. At the same time, the pore size should be matched with the interface of the ultrafiltration device to facilitate subsequent sealing and fixing. After drilling, the remaining sawdust and dust in the hole should be cleaned to prevent these impurities from entering the ultrafiltration device and affecting the quality of birch sap. In the third step, the vacuum ultrafiltration device includes a vacuum pump and an ultrafiltration membrane. During installation, it should be ensured that the ultrafiltration membrane and the drilling hole of the trunk are well sealed to prevent air leakage and ensure the vacuum degree of the extraction process. The parameters in the fifth step are vacuum degree, temperature and flow rate. The vacuum degree is controlled at 0.01MPa to ensure the efficiency of the ultrafiltration process and the quality of birch sap. The temperature is controlled at 10℃ to prevent the birch sap from deteriorating during the ultrafiltration process, which also helps to increase the ultrafiltration rate. The flow rate is controlled at 100 ml / min to ensure the continuity and stability of the ultrafiltration process to avoid blockage of the ultrafiltration membrane or excessive dilution of the birch sap. The waste liquid treatment in the sixth step specifically includes collecting the waste liquid and converting it into harmless substances through biodegradation to reduce pollution to the environment. The specific method of concentration and purification in the seventh step includes further concentration of the birch sap using reverse osmosis technology and then purification by ion exchange to remove possible trace impurities to ensure the purity and taste of the final product. Through the precisely controlled vacuum ultrafiltration technology, the nutrients in the birch sap can be effectively retained, while impurities and microorganisms are removed to ensure the purity and safety of the birch sap. This method is less harmful to the birch tree, is conducive to sustainable collection, and can effectively improve the extraction efficiency of birch sap while ensuring the quality of the extracted sap. .

[0028] Embodiment 2: A vacuum ultrafiltration method for efficiently extracting birch sap, such as Figure 1As shown, the method specifically includes the following steps: the first step: cleaning treatment: selecting suitable birch trees for bark cleaning treatment; the second step: drilling treatment: drilling holes on the cleaned trunks to facilitate the subsequent installation of vacuum ultrafiltration devices; the third step: vacuum ultrafiltration device installation: installing vacuum ultrafiltration devices at the drilled holes of the birch trees; the fourth step: birch sap extraction: negative pressure is generated by the vacuum pump on the vacuum ultrafiltration device to force the birch sap to be filtered through the ultrafiltration membrane on the vacuum ultrafiltration device to ensure that the effective ingredients in the birch sap are retained while removing impurities and waste liquid; the fifth step: Data monitoring and adjustment: real-time monitoring and adjustment of the parameters in the ultrafiltration process to ensure the stability and efficiency of the extraction process; Step 6: Waste liquid treatment: treatment of waste liquid generated during the extraction process to reduce the impact on the environment; Step 7: Concentration and purification: subsequent concentration and purification of birch sap after ultrafiltration membrane filtration to improve its quality and shelf life; Step 8: Quality inspection: quality inspection of the extracted birch sap to ensure that it meets food safety standards; Step 9: Packaging and storage: sealed packaging and storage of the extracted birch sap , to ensure its freshness and safety during transportation and sales. The first step of cleaning includes rinsing the bark with sterile water to remove dust and microorganisms on the surface. During the rinsing process, the water flow should be gentle to avoid damage to the bark. After cleaning, the bark surface should be allowed to dry naturally or wiped gently with a sterile cloth to ensure that there is no residual moisture on the bark surface. This can reduce the pollution that may be introduced during the drilling process and ensure the purity of the extracted birch sap. The second step of drilling includes drilling with a drill bit of appropriate diameter to ensure the ultrafiltration device The device can be stably installed. The drilling depth should be moderate to avoid damaging the growth layer of the tree. At the same time, the pore size should be matched with the interface of the ultrafiltration device to facilitate subsequent sealing and fixing. After drilling, the remaining sawdust and dust in the hole should be cleaned to prevent these impurities from entering the ultrafiltration device and affecting the quality of birch sap. In the third step, the vacuum ultrafiltration device includes a vacuum pump and an ultrafiltration membrane. During installation, it should be ensured that the ultrafiltration membrane and the drilling hole of the trunk are well sealed to prevent air leakage and ensure the vacuum degree of the extraction process. The parameters in the fifth step are vacuum degree, temperature and flow rate. The vacuum degree is controlled at 0.03MPa to ensure the efficiency of the ultrafiltration process and the quality of birch sap, the temperature is controlled at 15℃ to prevent the birch sap from deteriorating during the ultrafiltration process, and it also helps to increase the ultrafiltration rate. The flow rate is controlled at 200 ml / min to ensure the continuity and stability of the ultrafiltration process to avoid blockage of the ultrafiltration membrane or excessive dilution of the birch sap. The waste liquid treatment in the sixth step specifically includes collecting the waste liquid and converting it into harmless substances through chemical treatment to reduce pollution to the environment. The specific method of concentration and purification in the seventh step includes further concentration of the birch sap using evaporation concentration technology, and then purification by activated carbon adsorption to remove possible trace impurities to ensure the purity and taste of the final product. By real-time monitoring and adjustment of the parameters in the ultrafiltration process, the stability and efficiency of the extraction process can be ensured and the yield of birch sap can be increased. .

[0029] Embodiment 3: A vacuum ultrafiltration method for efficiently extracting birch sap, such as Figure 1As shown, the method specifically includes the following steps: the first step: cleaning treatment: selecting suitable birch trees for bark cleaning treatment; the second step: drilling treatment: drilling holes on the cleaned trunks to facilitate the subsequent installation of vacuum ultrafiltration devices; the third step: vacuum ultrafiltration device installation: installing vacuum ultrafiltration devices at the drilled holes of the birch trees; the fourth step: birch sap extraction: negative pressure is generated by the vacuum pump on the vacuum ultrafiltration device to force the birch sap to be filtered through the ultrafiltration membrane on the vacuum ultrafiltration device to ensure that the effective ingredients in the birch sap are retained while removing impurities and waste liquid; the fifth step: Data monitoring and adjustment: real-time monitoring and adjustment of the parameters in the ultrafiltration process to ensure the stability and efficiency of the extraction process; Step 6: Waste liquid treatment: treatment of waste liquid generated during the extraction process to reduce the impact on the environment; Step 7: Concentration and purification: subsequent concentration and purification of birch sap after ultrafiltration membrane filtration to improve its quality and shelf life; Step 8: Quality inspection: quality inspection of the extracted birch sap to ensure that it meets food safety standards; Step 9: Packaging and storage: sealed packaging and storage of the extracted birch sap , to ensure its freshness and safety during transportation and sales. The first step of cleaning includes rinsing the bark with sterile water to remove dust and microorganisms on the surface. During the rinsing process, the water flow should be gentle to avoid damage to the bark. After cleaning, the bark surface should be allowed to dry naturally or wiped gently with a sterile cloth to ensure that there is no residual moisture on the bark surface. This can reduce the pollution that may be introduced during the drilling process and ensure the purity of the extracted birch sap. The second step of drilling includes drilling with a drill bit of appropriate diameter to ensure the ultrafiltration device The device can be stably installed. The drilling depth should be moderate to avoid damaging the growth layer of the tree. At the same time, the pore size should be matched with the interface of the ultrafiltration device to facilitate subsequent sealing and fixing. After drilling, the remaining sawdust and dust in the hole should be cleaned to prevent these impurities from entering the ultrafiltration device and affecting the quality of birch sap. In the third step, the vacuum ultrafiltration device includes a vacuum pump and an ultrafiltration membrane. During installation, it should be ensured that the ultrafiltration membrane and the drilling hole of the trunk are well sealed to prevent air leakage and ensure the vacuum degree of the extraction process. The parameters in the fifth step are vacuum degree, temperature and flow rate. The vacuum degree is controlled at 0.04MPa to ensure the efficiency of the ultrafiltration process and the quality of birch sap, the temperature is controlled at 20℃ to prevent the birch sap from deteriorating during the ultrafiltration process, and it also helps to increase the ultrafiltration rate, the flow rate is controlled at 300 ml / min to ensure the continuity and stability of the ultrafiltration process to avoid clogging of the ultrafiltration membrane or excessive dilution of the birch sap, the waste liquid treatment in the sixth step specifically includes collecting the waste liquid and converting it into harmless substances through biodegradation to reduce pollution to the environment, the specific method of concentration and purification in the seventh step includes further concentration of the birch sap using reverse osmosis technology, and then purification by ion exchange method to remove possible trace impurities to ensure the purity and taste of the final product, through the waste liquid treatment and quality testing steps, not only the environmental pollution is reduced, but also the quality of the final product is ensured to meet the food safety standards. .

[0030] Embodiment 4: A vacuum ultrafiltration method for efficiently extracting birch sap, such as Figure 1As shown, the specific steps include: the first step: cleaning treatment: select suitable birch trees for bark cleaning treatment; the second step: drilling treatment: drill holes on the cleaned trunk to facilitate the subsequent installation of a vacuum ultrafiltration device; the third step: vacuum ultrafiltration device installation: install a vacuum ultrafiltration device at the drilled hole of the birch tree; the fourth step: birch sap extraction: a negative pressure is generated by the vacuum pump on the vacuum ultrafiltration device to force the birch sap to be filtered through the ultrafiltration membrane on the vacuum ultrafiltration device to ensure that the effective ingredients in the birch sap are retained while removing impurities and waste liquid; the fifth step: parameter monitoring and adjustment: real-time monitoring and adjustment of the parameters in the ultrafiltration process to ensure the stability and efficiency of the extraction process; the sixth step: waste liquid treatment: the waste liquid generated in the extraction process is The seventh step is to concentrate and purify the birch sap after filtering through the ultrafiltration membrane to improve its quality and shelf life. The eighth step is to test the quality of the extracted birch sap to ensure that it meets the food safety standards. The ninth step is to package and store the extracted birch sap in a sealed manner to ensure its freshness and safety during transportation and sales. The cleaning process in the first step includes rinsing the bark with sterile water to remove dust and microorganisms on the surface. During the rinsing process, the water flow should be gentle to avoid damage to the bark. After cleaning, the bark surface should be allowed to dry naturally or wiped gently with a sterile cloth to ensure that there is no residual water on the bark surface. This can reduce the pollution that may be introduced during the drilling process and ensure the purity of the extracted birch sap. The second step of drilling includes using a drill bit with a suitable diameter to drill holes to ensure that the ultrafiltration device can be stably installed. The drilling depth should be moderate to avoid damaging the growth layer of the tree. At the same time, it is necessary to ensure that the pore size matches the interface of the ultrafiltration device to facilitate subsequent sealing and fixation. After drilling, the remaining sawdust and dust in the hole should be cleaned to prevent these impurities from entering the ultrafiltration device and affecting the quality of the birch sap. The third step of the vacuum ultrafiltration device includes a vacuum pump and an ultrafiltration membrane. During installation, it should be ensured that the ultrafiltration membrane is well sealed with the drilling hole in the trunk to prevent air leakage and ensure the vacuum degree of the extraction process. The parameters in the fifth step are specifically the vacuum degree, temperature and flow rate. The air density is controlled at 0.06MPa to ensure the efficiency of the ultrafiltration process and the quality of the birch sap. The temperature is controlled at 25°C to prevent the birch sap from deteriorating during the ultrafiltration process, which also helps to increase the ultrafiltration rate. The flow rate is controlled at 400 ml / min to ensure the continuity and stability of the ultrafiltration process to avoid clogging of the ultrafiltration membrane or excessive dilution of the birch sap. The waste liquid treatment in the sixth step specifically includes collecting the waste liquid and converting it into harmless substances through chemical treatment methods to reduce pollution to the environment. The specific method of concentration and purification treatment in the seventh step includes further concentrating the birch sap using evaporation concentration technology, and then purifying it through activated carbon adsorption method to remove possible trace impurities to ensure the purity and taste of the final product.

[0031] Example 5: A vacuum ultrafiltration method for efficiently extracting birch sap, such as Figure 1As shown, the specific steps include: the first step: cleaning treatment: select suitable birch trees for bark cleaning treatment; the second step: drilling treatment: drill holes on the cleaned trunk to facilitate the subsequent installation of a vacuum ultrafiltration device; the third step: vacuum ultrafiltration device installation: install a vacuum ultrafiltration device at the drilled hole of the birch tree; the fourth step: birch sap extraction: a negative pressure is generated by the vacuum pump on the vacuum ultrafiltration device to force the birch sap to be filtered through the ultrafiltration membrane on the vacuum ultrafiltration device to ensure that the effective ingredients in the birch sap are retained while removing impurities and waste liquid; the fifth step: parameter monitoring and adjustment: real-time monitoring and adjustment of the parameters in the ultrafiltration process to ensure the stability and efficiency of the extraction process; the sixth step: waste liquid treatment: the waste liquid generated in the extraction process is The seventh step is to concentrate and purify the birch sap after filtering through the ultrafiltration membrane to improve its quality and shelf life. The eighth step is to test the quality of the extracted birch sap to ensure that it meets the food safety standards. The ninth step is to package and store the extracted birch sap in a sealed package to ensure its freshness and safety during transportation and sales. The first step involves rinsing the bark with sterile water to remove dust and microorganisms on the surface. During the rinsing process, the water flow should be gentle to avoid damage to the bark. After cleaning, the bark surface should be allowed to dry naturally or wiped gently with a sterile cloth to ensure that there is no residue on the bark surface. Moisture, which can reduce the pollution that may be introduced during the drilling process and ensure the purity of the extracted birch sap. The second step of drilling includes using a drill bit with a suitable diameter to ensure that the ultrafiltration device can be stably installed. The drilling depth should be moderate to avoid damaging the growth layer of the tree. At the same time, it is necessary to ensure that the pore size matches the interface of the ultrafiltration device for subsequent sealing and fixation. After drilling, the remaining sawdust and dust in the hole should be cleaned to prevent these impurities from entering the ultrafiltration device and affecting the quality of the birch sap. The third step of the vacuum ultrafiltration device includes a vacuum pump and an ultrafiltration membrane. During installation, it should be ensured that the ultrafiltration membrane is well sealed with the drilling hole in the trunk to prevent air leakage and ensure the vacuum degree of the extraction process. The parameters in the fifth step are specifically the vacuum degree, temperature and flow rate. The vacuum degree is controlled at 0.09MPa to ensure the efficiency of the ultrafiltration process and the quality of the birch sap. The temperature is controlled at 30°C to prevent the birch sap from deteriorating during the ultrafiltration process, which also helps to increase the ultrafiltration rate. The flow rate is controlled at 500 ml / min to ensure the continuity and stability of the ultrafiltration process to avoid clogging of the ultrafiltration membrane or excessive dilution of the birch sap. The waste liquid treatment in the sixth step specifically includes collecting the waste liquid and converting it into harmless substances through biodegradation to reduce pollution to the environment. The specific method of concentration and purification in the seventh step includes further concentrating the birch sap using reverse osmosis technology and then purifying it through ion exchange to remove possible trace impurities to ensure the purity and taste of the final product.

[0032] The working principle of the present invention is as follows: by installing a vacuum ultrafiltration device on a white birch tree, a vacuum pump is used to generate negative pressure, and the birch sap is forced to be filtered through an ultrafiltration membrane. The pore size design of the ultrafiltration membrane can effectively intercept macromolecular nutrients and effective ingredients, while allowing small molecular water and some inorganic salts to pass through, thereby achieving purification and concentration of the birch sap. During the ultrafiltration process, by real-time monitoring of key parameters such as vacuum degree, temperature and flow rate, the stability and efficiency of the extraction process can be ensured, while avoiding blockage of the ultrafiltration membrane or excessive dilution of the birch sap. Finally, the birch sap is further concentrated by reverse osmosis technology or evaporation concentration technology, and possible trace impurities are removed by ion exchange or activated carbon adsorption method, thereby ensuring the purity and taste of the final product.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vacuum ultrafiltration method for efficiently extracting birch sap, characterized in that: The specific steps include: Step 1: Cleaning: Select appropriate birch trees for bark cleaning; Step 2: Drilling: Drill holes on the cleaned tree trunk to facilitate the subsequent installation of the vacuum ultrafiltration device; Step 3: Installation of vacuum ultrafiltration device: Install the vacuum ultrafiltration device at the hole drilled in the birch tree; Step 4: Birch sap extraction: The vacuum pump on the vacuum ultrafiltration device generates negative pressure to force the birch sap to be filtered through the ultrafiltration membrane on the vacuum ultrafiltration device to ensure that the effective ingredients in the birch sap are retained while removing impurities and waste liquid; Step 5: Parameter monitoring and adjustment: Real-time monitoring and adjustment of the parameters during the ultrafiltration process to ensure the stability and efficiency of the extraction process; Step 6: Waste liquid treatment: Treat the waste liquid generated during the extraction process to reduce the impact on the environment; Step 7: Concentration and purification: The birch sap filtered through the ultrafiltration membrane is subsequently concentrated and purified to improve its quality and shelf life; Step 8: Quality testing: Conduct quality testing on the extracted birch sap to ensure it meets food safety standards; Step 9: Packaging and storage: The extracted birch sap is sealed and stored to ensure its freshness and safety during transportation and sales.

2. The vacuum ultrafiltration method for efficiently extracting birch sap according to claim 1, characterized in that: The first cleaning step involves rinsing the bark with sterile water.

3. The vacuum ultrafiltration method for efficiently extracting birch sap according to claim 1, characterized in that: The drilling process in the second step includes drilling with a drill bit of suitable diameter.

4. The vacuum ultrafiltration method for efficiently extracting birch sap according to claim 1, characterized in that: The vacuum ultrafiltration device in the third step comprises a vacuum pump and an ultrafiltration membrane.

5. The vacuum ultrafiltration method for efficiently extracting birch sap according to claim 1, characterized in that: The parameters in the fifth step are specifically vacuum degree, temperature and flow rate. The vacuum degree is controlled at 0.01 MPa to 0.09 MPa, the temperature is controlled at 10° C. to 30° C., and the flow rate is controlled at 100 to 500 ml / min.

6. The vacuum ultrafiltration method for efficiently extracting birch sap according to claim 1, characterized in that: The waste liquid treatment in the sixth step specifically includes collecting the waste liquid and converting it into harmless substances through biodegradation or chemical treatment.

7. The vacuum ultrafiltration method for efficiently extracting birch sap according to claim 1, characterized in that: The specific method of the concentration and purification treatment in the seventh step includes further concentrating the birch sap using reverse osmosis technology or evaporation concentration technology, and then purifying it by ion exchange or activated carbon adsorption method.

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