Plantain fruit extract-containing small-molecule water and a preparation method thereof

Abstract

The application discloses a kind of small molecule water containing plantain fruit extract and a preparation method thereof, and belongs to the field of biotechnology.The mountain spring water is sequentially filtered by quartz sand filter, activated carbon filter, security filter, ultrafiltration membrane or nanofiltration membrane or reverse osmosis membrane, ozone mixed disinfection, then the treated mountain spring water is mixed with plantain fruit extract to obtain small molecule water containing plantain fruit extract.The small molecule water containing plantain fruit extract maintains pure natural plant activity, has the characteristics of alkalinity, negative potential and smaller cluster, and has stable performance and simple preparation method.

Description

Technical Field

[0001] This invention belongs to the field of biotechnology, and in particular relates to a small molecule water containing banana fruit extract and its preparation method. Background Technology

[0002] With the upgrading of health consumption concepts, consumers' demand for drinking water has shifted from basic safety and thirst quenching to functionality and health benefits. Small molecule water, due to its small molecular clusters, strong permeability, and easy absorption by the human body, has gradually become a research hotspot in the drinking water field. However, existing small molecule water preparation technologies still have many shortcomings: First, small molecule water prepared by purely physical methods has poor stability, and water molecule clusters are prone to recombination, leading to rapid degradation of functional properties during storage and transportation, making it difficult to maintain the advantages of the small molecule structure in the long term; Second, existing technologies mostly focus on the physical modification of water molecule clusters, lacking the enhancement of water functionality, and the products often only possess basic small molecule characteristics without incorporating the added health value brought by natural active ingredients; Fourth, traditional small molecule water is mostly neutral or weakly acidic in pH, lacking targeted research and development for alkaline drinking water, making it difficult to meet the needs of some consumers for alkaline health drinks.

[0003] Meanwhile, the application of natural plant extracts in drinking water is gradually gaining attention. Rich in various bioactive substances, and widely available and inexpensive, they possess natural advantages for drinking water applications. However, there are currently no reports on combining banana fruit extract with small molecule water preparation technology. Existing technologies fail to fully utilize the active ingredients of banana fruit extract to achieve the dual goals of improving the stability and enhancing the function of small molecule water. Therefore, developing a small molecule water with a simple preparation process, high stability, and both natural plant activity and alkaline properties to address the insufficient stability and limited functionality of existing small molecule water has become a crucial breakthrough direction in the current drinking water field. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a small molecule water containing banana fruit extract and its preparation method. The product contains natural plant active ingredients, has the characteristics of being alkaline, having a negative potential, having smaller clusters, and exhibiting stable performance over a long period of time.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: This invention provides a small molecule water containing banana fruit extract, comprising banana fruit extract and water.

[0006] Preferably, the water includes treated spring water or purified water.

[0007] Preferably, the preparation steps of the treated spring water include: filtering the spring water sequentially through a quartz sand filter, an activated carbon filter, a security filter, and a reverse osmosis membrane, followed by disinfection.

[0008] Preferably, the reverse osmosis membrane is replaced with an ultrafiltration membrane or a nanofiltration membrane.

[0009] The present invention provides a method for preparing small molecule water containing banana fruit extract, comprising the following steps: mixing banana fruit extract with water and stirring evenly; wherein the water includes treated spring water or purified water.

[0010] Preferably, the volume ratio of the banana fruit extract to water is (0.1-10):100.

[0011] Preferably, the preparation steps of the treated spring water include: filtering the spring water sequentially through a quartz sand filter, an activated carbon filter, a security filter, a reverse osmosis membrane, an ultrafiltration membrane, or a nanofiltration membrane, and then disinfecting it.

[0012] Preferably, the quartz sand filter has a membrane pore size of 10-50 μm, the activated carbon filter has a membrane pore size of 5-20 μm, the security filter has a membrane pore size of 1-5 μm, the ultrafiltration membrane has a membrane pore size of 0.01-0.1 μm, the nanofiltration membrane has a membrane pore size of 0.001-0.01 μm, and the reverse osmosis membrane has a membrane pore size of 0.0001-0.001 μm.

[0013] Preferably, the filtration conditions for both the quartz sand filter and the activated carbon filter include: a temperature of 10-25℃, a filter bed flow rate of 5-10 m / h, and a filtration pressure of 0.1-0.3 MPa; the filtration conditions for the security filter include: a temperature of 10-25℃, a membrane surface flow rate of 1-3 m / h, and a filtration pressure of 0.2-0.4 MPa; and the filtration conditions for the ultrafiltration membrane include: a temperature of 10-25℃ and a membrane flux of 50-150 L / (m³). 2 •h) and filtration pressure of 0.1-0.5MPa; the conditions for nanofiltration include: temperature of 10-25℃, membrane flux of 20-80L / (m 2 •h) and filtration pressure of 0.5-2.0 MPa; the reverse osmosis membrane filtration conditions include: temperature of 10-25℃, membrane flux of 20-80 L / (m 2 •h) and filtration pressure of 1.0-4.0MPa.

[0014] This invention provides an application of banana fruit extract in the preparation of small molecule water.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention is the first to prepare small-molecule water containing banana fruit extract by mixing banana fruit extract with water. The preparation method is simple and easy to implement. The prepared product contains natural plant active ingredients, exhibits alkalinity, negative potential, smaller cluster size, and stable performance over long periods of storage.

[0016] Furthermore, the small molecule water of banana fruit extract obtained by treating spring water using a specific method and mixing it with banana fruit extract has higher stability. Attached Figure Description

[0017] Figure 1 This is a process flow diagram for preparing small molecule water from banana fruit extract.

[0018] Figure 2 2508004327-1 17 O-NMR spectrum.

[0019] Figure 3 2508004327-2 17 O-NMR spectrum.

[0020] Figure 4 2508004327-3 17 O-NMR spectrum.

[0021] Figure 5 2508004327-4 17 O-NMR spectrum.

[0022] Figure 6 Small molecule water from banana fruit extract at 1 day, 7 days, and 10 days 17 O-NMR spectrum.

[0023] Figure 7 For the stability study of samples 1-6 17 O-NMR spectrum.

[0024] Figure 8 For the stability study of samples 7-10 17 O-NMR spectrum.

[0025] Figure 9 To investigate the small molecule water stability of banana fruit extract after standing for 30 days at room temperature and high temperature. 17 O-NMR spectrum.

[0026] Figure 10 Stability of small molecules of different banana fruit extracts prepared for Rongcao Mountain spring water. 17 O-NMR spectrum. Detailed Implementation

[0027] This invention provides a small-molecule water containing plantain fruit extract, comprising plantain fruit extract and water. The plantain (MUSA SAPIENTUM) extract of this invention is prepared based on the extraction process of banana extract in Example 1 of patent TW1584814B, and the resulting banana extract is the plantain fruit extract. The plantain fruit extract of this invention is alkaline; when mixed with water, it yields alkaline plantain fruit extract small-molecule water.

[0028] In this invention, the water includes treated spring water or purified water, preferably spring water. The preparation steps of the treated spring water in this invention include: filtering the spring water sequentially through a quartz sand filter, an activated carbon filter, a security filter, and a reverse osmosis membrane, followed by disinfection; the reverse osmosis membrane is replaced with an ultrafiltration membrane or a nanofiltration membrane. The spring water or purified water in this invention is obtained through commercially known channels in the art.

[0029] This invention provides a method for preparing small molecule water containing banana fruit extract, comprising the following steps: mixing banana fruit extract with water and stirring evenly; wherein the water includes treated spring water or purified water. The volume ratio of banana fruit extract to water in this invention is (0.1-10):100, more preferably (0.11-5):100, and preferably (0.12-3):100.

[0030] In this invention, the preparation steps of the treated spring water include: filtering the spring water sequentially through a quartz sand filter, an activated carbon filter, a security filter, and a reverse osmosis membrane, followed by disinfection; the reverse osmosis membrane is replaced with an ultrafiltration membrane or a nanofiltration membrane. The disinfection in this invention is ozone disinfection. The entire process of this invention uses a closed-loop pump delivery system, the core of which is to avoid secondary pollution and ensure no contact with air throughout the process. The spring water in this invention is extracted from the water intake pump station and transported through food-grade pipelines to a water storage tank in the production workshop. The water in the storage tank is then pumped through a booster pump and sequentially sent to various stages of filtration equipment, all within a closed loop with no exposed sections.

[0031] In this invention, the water source is first filtered through quartz sand to remove large suspended particles, and then filtered through activated carbon to adsorb odors, residual chlorine and some organic matter; a security filter filters out fine impurities to prevent scratching subsequent precision membranes; ultrafiltration / nanofiltration / reverse osmosis membrane filtration removes microorganisms and harmful impurities while retaining beneficial minerals.

[0032] In this invention, the quartz sand filter has a membrane pore size of 10-50 μm, preferably 20-40 μm, and more preferably 30 μm; the activated carbon filter has a membrane pore size of 5-20 μm, preferably 9-15 μm, and more preferably 12 μm; the security filter has a membrane pore size of 1-5 μm, preferably 2-4 μm, and more preferably 3 μm; the ultrafiltration membrane has a membrane pore size of 0.01-0.1 μm, preferably 0.02-0.09 μm, and more preferably 0.05 μm; the nanofiltration membrane has a membrane pore size of 0.001-0.01 μm, preferably 0.003-0.008 μm, and more preferably 0.005 μm; and the reverse osmosis membrane has a membrane pore size of 0.0001-0.001 μm.

[0033] In this invention, the filtration conditions for both the quartz sand filter and the activated carbon filter include: a temperature of 10-25℃, a filter bed flow rate of 5-10 m / h, and a filtration pressure of 0.1-0.3 MPa, preferably a temperature of 15℃, a filter bed flow rate of 8 m / h, and a filtration pressure of 0.2 MPa; the filtration conditions for the security filter include: a temperature of 10-25℃, a membrane surface flow rate of 1-3 m / h, and a filtration pressure of 0.2-0.4 MPa, preferably a temperature of 15℃, a membrane surface flow rate of 2 m / h, and a filtration pressure of 0.3 MPa; the filtration conditions for the ultrafiltration membrane include: a temperature of 10-25℃ and a membrane flux of 50-150 L / (m³). 2 The nanofiltration membrane is configured with a temperature of 15°C, a membrane flux of 100 L / (m²•h), and a filtration pressure of 0.1-0.5 MPa, preferably 15°C, a membrane flux of 100 L / (m²•h), and a filtration pressure of 0.3 MPa. The nanofiltration conditions include a temperature of 10-25°C and a membrane flux of 20-80 L / (m²•h). 2 •h) and filtration pressure of 0.5-2.0 MPa, preferably temperature of 15℃ and membrane flux of 50 L / (m 2 •h) and filtration pressure of 1.5MPa; the reverse osmosis membrane filtration conditions include: temperature of 10-25℃, membrane flux of 20-80L / (m 2 •h) and filtration pressure of 1.0-4.0 MPa, preferably 15℃, membrane flux of 50 L / (m 2 •h) and the filtration pressure is 2.0MPa.

[0034] In this invention, a combination of quartz sand, activated carbon, and security filtration is used to remove impurities such as silt, colloids, organic matter, and residual chlorine, preventing these impurities from catalyzing hydrogen bond rearrangement or cluster aggregation. Reverse osmosis, ultrafiltration, or nanofiltration is used to retain large molecules, microorganisms, and high-valence ions while retaining a small amount of beneficial minerals. This ensures water purity while maintaining appropriate ionic strength, preventing overly pure water from causing changes in cluster structure. This invention treats spring water in a completely sealed process followed by ozone disinfection, eliminating air contact and secondary pollution, preventing oxygen and microorganisms from disrupting the water's hydrogen bond network, and providing a clean environment for the stability of small molecular clusters.

[0035] This invention provides an application of banana fruit extract in the preparation of small molecule water. By mixing banana fruit extract with water, this invention yields small molecule water with even smaller clusters. The purified spring water treated by this invention's special method provides a low-interference, low-ionic-strength basic water environment, reducing the driving force for cluster growth. The banana fruit extract actively locks the small molecule cluster structure through hydrogen bond anchoring, steric hindrance, charge shielding, and antioxidant effects, inhibiting its transformation into large molecule clusters. This invention, through the combination of purified spring water and banana fruit extract, results in a smaller half-width (WHM) of the small molecule water produced by mixing the treated spring water and banana fruit extract. 17 O-NMR can be maintained at a low level for a long time, showing better stability.

[0036] The technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0037] The banana fruit extract described in the following examples was prepared based on the extraction process of banana extract in Example 1 of patent TW1584814B, and the banana extract obtained by this patent is the banana fruit extract.

[0038] Unless otherwise specified, the following embodiments are all conventional methods.

[0039] Unless otherwise specified, all materials and reagents used in the following examples are commercially available.

[0040] Example 1 (1) Pretreatment filtration: Spring water is extracted from the water intake pump station and transported to the water storage tank in the production workshop through food-grade pipelines. The water in the storage tank is then pumped through a booster pump into a 30μm quartz sand filter to remove large suspended particles such as silt and rust. Then, it is pumped through a booster pump into a 12μm activated carbon filter to adsorb odors, residual chlorine, and some organic matter. The filtration temperature is 15℃, the filter bed flow rate is 8m / h, and the filtration pressure is 0.2MPa.

[0041] (2) Fine filtration: The pretreated water is then pumped into a 3μm pore size security filter to intercept fine particles not filtered out in the previous stage, protecting the subsequent precision membrane elements, and obtaining finely filtered water. The filtration temperature is 15℃, the membrane surface flow rate is 2m / h, and the filtration pressure is 0.3MPa.

[0042] (3) Core Filtration: The finely filtered water is then pumped through a booster pump into a 0.05μm ultrafiltration membrane device to remove bacteria, viruses, colloids, and other microorganisms, small molecular impurities, and harmful impurities, while retaining beneficial minerals, resulting in core purified water. The filtration temperature is 15℃, and the membrane flux is 100L / (m²). 2 •h), the filtration pressure is 0.3MPa.

[0043] (4) Ozone mixing disinfection: The core purified water is introduced into the ozone mixing tower and disinfected by multi-stage bubbling design to obtain ozone-disinfected water.

[0044] (5) Mixing and stirring: The banana fruit extract and water were mixed in a 1000L single-layer stainless steel liquid mixing tank. The tank diameter was 1100mm and the straight edge height was 1000mm. The stirring motor was a three-phase 1.5kw with a cycloidal reducer with a speed ratio of 35. The stirring method was a frame stirring, with a constant stirring speed of 41 revolutions per minute. The stirring time was 60 minutes. After filtration, the mixture was transferred to a finished product tank for storage. The finished product was then transferred to a filling tank for filling. Small molecule water containing banana fruit was obtained.

[0045] The above-mentioned complete filtration cycle is a fully enclosed process with no exposed parts. From source water to finished water, the treatment time for a single batch is typically 2 hours (including rinsing and backwashing time). The membrane element cleaning cycle is as follows: after 2 months of operation, chemical cleaning is required to restore membrane flux, with a cleaning time of approximately 45 minutes per cycle.

[0046] Example 2 In step (3), the ultrafiltration membrane with a pore size of 0.005 μm is replaced with a nanofiltration membrane with a pore size of 50 L / (m²). 2 •h), the filtration pressure is 1.5MPa.

[0047] Example 3 In step (3), the ultrafiltration membrane with a pore size of 0.0001 μm is replaced with a reverse osmosis membrane. The membrane flux is 50 L / (m²). 2 •h), the filtration pressure is 2MPa.

[0048] Experimental Example 1 The spring water source was from the Jiulong Waterfall National Forest Park in Hengzhou City, Guangxi Province. Water was obtained after filtration and ozone disinfection based on the preparation method described in Example 1. The prepared water was mixed with banana fruit extract at the following concentrations: 0.26 liters, 0.23 liters, 0.17 liters, and 0.12 liters per 100 liters, to prepare small-molecule water containing banana fruit extract at concentrations of 0.26%, 0.23%, 0.17%, and 0.12%. The half-peak widths (WHMs) of these small molecules were then measured using nuclear magnetic resonance spectroscopy (NMR). 17 O-NMR reagent (deuterated water) and Zeta potential detection were performed by Shanghai Microspectrometry Detection Technology Group Co., Ltd. using standard in-house laboratory methods. Results are shown in Table 1 below. Figure 2-5 As shown in the figure. The results indicate that mixing banana fruit extract with treated spring water yields alkaline, negatively charged small-molecule water.

[0049] Table 1. Results of small molecule water detection in banana fruit extracts at different concentrations

[0050] Experimental Example 2 1. Determine the half-width using nuclear magnetic oxygen spectroscopy. 17 The O-NMR reagent is deuterated water.

[0051] Test method: Take 0.6 ml of banana extract (SGS-001 stock solution, sample number: 2400617204) and add it to 200 ml of Wahaha purified water to prepare a 3v / v% solution. Test the NMR half-width at half-maximum (WHM) of the prepared 3% solution as soon as possible; then test the WHM after 7 days and 30 days. The results are shown in Table 2. Figure 6 As shown in the figure. The results indicate that banana fruit extract can effectively convert purified water into small water molecule clusters, and the half-peak width of these small water molecule clusters continuously decreases over time within 30 days.

[0052] Table 2. Results of small molecule water stability test of banana fruit extract.

[0053] 2. Study on the small molecule water stability of banana fruit extract Nuclear magnetic oxygen spectroscopy was used to determine the half-width. 17 The O-NMR reagent is deuterated water.

[0054] Water was taken from the Jiulong Waterfall National Forest Park in Hengzhou City, Guangxi Province. After ozone disinfection, the water was obtained using the method described in Example 1, and then treated as follows: Sample 1: Heat the water to 100℃, let it cool and stand for 48 hours, and then perform half-width measurement.

[0055] Sample 2: Add banana fruit extract to water, 1 drop per 100 mL, and measure immediately after addition.

[0056] Sample 3: Add banana fruit extract to water, 2 drops per 100 mL, and measure immediately after addition.

[0057] Sample 4: Add banana fruit extract to water, 3 drops per 100 mL, and measure immediately after addition.

[0058] Sample 5: Add banana fruit extract to water, 1 drop per 100 mL, let stand for 48 hours after adding, and then measure.

[0059] Sample 6: Add banana fruit extract to water, 2 drops per 100 mL, let stand for 48 hours after adding, and then measure.

[0060] Sample 7: Add banana fruit extract to water, 3 drops per 100 mL, let stand for 48 hours after adding, and then measure.

[0061] Sample 8: Add banana fruit extract to water, 1 drop per 100 mL; then heat to 100℃, cool and let stand for 48 hours before measurement.

[0062] Sample 9: Add banana fruit extract to water, 2 drops per 100 mL; then heat to 100℃, cool and let stand for 48 hours before measurement.

[0063] Sample 10: Add banana fruit extract to water, 3 drops per 100 mL; then heat to 100℃, cool and let stand for 48 hours before measurement.

[0064] The results are shown in Table 3 and Figure 7 , Figure 8 As shown in the figure. The results indicate that banana extract can effectively induce the formation of small water clusters, and these small water clusters exhibit excellent stability after standing at room temperature and after high-temperature treatment; within the experimental range, the greater the amount of extract added, the more significant the formation effect of small water clusters.

[0065] Table 3. Results of small molecule water stability test of banana fruit extract.

[0066] 3. Stability study of small molecule water in banana fruit extract after standing for 30 days at room temperature and high temperature. The half-width was determined by nuclear magnetic resonance spectroscopy. 17 The O-NMR reagent is deuterated water.

[0067] Water was taken from the Jiulong Waterfall National Forest Park in Hengzhou City, Guangxi Province. After ozone disinfection, the water was obtained using the method described in Example 1, and then treated as follows: Water sample 5: Add banana fruit extract to water, 1 drop per 100 mL, and let stand for 30 days; Water sample 6: Add banana fruit extract to water, 2 drops per 100 mL, and let stand for 30 days; Water sample 7: Add banana fruit extract to water, 3 drops per 100 mL, and let stand for 30 days; Water sample 8: Add banana fruit extract to water, 1 drop per 100 mL, heat to 100℃, and let stand for 30 days; Water sample 9: Add banana fruit extract to water, 2 drops per 100 mL, heat to 100℃, and let stand for 30 days; Sample 10: Add banana fruit extract to water, 3 drops per 100 mL, heat to 100℃, and let stand for 30 days.

[0068] The results are shown in Table 4 and Figure 9 As shown, banana fruit extract can effectively induce the formation of small water clusters, and these small water clusters exhibit excellent stability after both standing at room temperature and high-temperature treatment. Within the experimental range, the higher the amount of extract added, the more significant the formation effect of small water clusters. This confirms that banana extract has significant application value in the preparation of long-term stable small water clusters.

[0069] Table 4. Results of small molecule water stability tests for different banana fruit extracts.

[0070] 4. Detection results of the half-peak width of the mixture of Rongcao Mountain Spring and banana fruit extract. Nuclear magnetic oxygen spectroscopy was used to determine the half-width. 17 The O-NMR reagent is deuterated water. Rongcaoshan Spring water comes from Rongcaoshan Spring Water Co., Ltd., Beiliu City, Guangxi Province.

[0071] 2307001129-3-1: Rongcaoshanquan direct test of NMR half-peak width.

[0072] 2307001129-3-2: After adding 1.5ml of banana fruit extract to each bottle (350mL) of Rongcao Mountain Spring, measure the NMR half-peak width as soon as possible.

[0073] 2307001129-3-3: Add 1.5ml of banana fruit extract to each bottle (350mL) of Rongcao Mountain Spring, heat to 100℃, cool, and measure the NMR half-peak width as soon as possible.

[0074] 2307001129-3-4: After adding 1.5ml of banana fruit extract to each bottle (350mL) of Rongcao Mountain Spring and letting it stand for one month, the half-peak width of the NMR was measured.

[0075] 2307001129-3-5: After adding 1.5ml of banana fruit extract to each bottle (350mL) of Rongcao Mountain Spring, heating it to 100℃ and cooling it for one month, the half-peak width of the NMR was measured.

[0076] The results are shown in Table 5 and Figure 10 As shown, banana fruit extract can effectively convert Rongcao Mountain spring water into small molecular cluster water, and this small molecular cluster water exhibits excellent long-term stability after treatment at both room temperature and high temperature, showing good application potential.

[0077] Table 5. Results of small molecule stability testing of different banana fruit extracts prepared with Rongcaoshan spring water.

[0078] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A small molecule water containing a plantain fruit extract, characterized in that, It contains banana fruit extract and water.

2. The small molecule water containing plantain fruit extract according to claim 1, wherein, The water includes treated spring water or purified water.

3. The small molecule water containing plantain fruit extract according to claim 2, wherein, The preparation steps of the treated spring water include: filtering the spring water sequentially through a quartz sand filter, an activated carbon filter, a security filter, and a reverse osmosis membrane, followed by disinfection.

4. The small molecule water containing plantain fruit extract according to claim 3, wherein, The reverse osmosis membrane is replaced with an ultrafiltration membrane or a nanofiltration membrane.

5. The method of claim 1-4, wherein the preparation of small molecule water containing plantain fruit extract is characterized by, The process includes the following steps: mixing banana fruit extract with water and stirring until homogeneous; the water includes treated spring water or purified water.

6. The preparation method according to claim 5, characterized in that, The volume ratio of the banana fruit extract to water is (0.1-10):

100.

7. The preparation method according to claim 5, characterized in that, The preparation steps of the treated spring water include: filtering the spring water sequentially through a quartz sand filter, an activated carbon filter, a security filter, a reverse osmosis membrane, an ultrafiltration membrane, or a nanofiltration membrane, and then disinfecting it.

8. The preparation method according to claim 7, characterized in that, The quartz sand filter has a membrane pore size of 10-50 μm, the activated carbon filter has a membrane pore size of 5-20 μm, the security filter has a membrane pore size of 1-5 μm, the ultrafiltration membrane has a membrane pore size of 0.01-0.1 μm, the nanofiltration membrane has a membrane pore size of 0.001-0.01 μm, and the reverse osmosis membrane has a membrane pore size of 0.0001-0.001 μm.

9. The preparation method according to claim 7, characterized in that, The filtration conditions for both the quartz sand filter and the activated carbon filter include: a temperature of 10-25℃, a filter bed flow rate of 5-10 m / h, and a filtration pressure of 0.1-0.3 MPa; the filtration conditions for the security filter include: a temperature of 10-25℃, a membrane surface flow rate of 1-3 m / h, and a filtration pressure of 0.2-0.4 MPa; the filtration conditions for the ultrafiltration membrane include: a temperature of 10-25℃, and a membrane flux of 50-150 L / (m³). 2 •h) and filtration pressure of 0.1-0.5MPa; the conditions for nanofiltration include: temperature of 10-25℃, membrane flux of 20-80L / (m 2 •h) and filtration pressure of 0.5-2.0 MPa; the reverse osmosis membrane filtration conditions include: temperature of 10-25℃, membrane flux of 20-80 L / (m 2 •h) and filtration pressure of 1.0-4.0MPa.

10. An application of a banana fruit extract in the preparation of small molecule water.

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