2129 results about "Ultrafiltration" patented technology

The invention discloses a system and a method for classified sewage treatment, and belongs to the technical field of environmental engineering and water treatment. The system comprises the following components: an intelligent water quality detection module, which is used for real-time and accurate monitoring of COD, BOD, ammonia nitrogen, total phosphorus, suspended matter concentration and heavy metal content; the sectional bioreactor realizes deep removal of nitrogen and phosphorus and efficient biological treatment by flexibly adjusting reaction conditions of each section; the intelligent flocculation control module is used for automatically and accurately adjusting the adding amount of a flocculating agent, and is combined with integrated operation of efficient inclined tube precipitation and sludge concentration, so that the water quality of discharged water is stable, and the medicament consumption is reduced; the ultrafiltration membrane bioreactor effectively removes residual suspended matters and colloids, and ensures that the effluent stably reaches the standard for a long time through the synergistic effect of catalytic ozonation; and the sludge treatment module is used for realizing collaborative optimization management of sludge reduction, recycling and energy recycling.

The invention relates to the technical field of water treatment equipment, in particular to a coaxial nested ultrafiltration and nanofiltration integrated water purification device and system.The coaxial nested ultrafiltration and nanofiltration integrated water purification device comprises a main shell, and an annular ultrafiltration treatment area and an inner nanofiltration treatment area are coaxially arranged in the main shell. An energy storage adjusting assembly is arranged in the nanofiltration treatment area and comprises an elastic breathing sleeve coaxially arranged outside the nanofiltration membrane assembly in a sleeving mode. The sleeve elastically expands during filtering, so that the effects of buffering pressure and storing energy are achieved; and turbulent flow convex ribs can be arranged on the inner wall of the sleeve, so that the nanofiltration membrane is physically cleaned when the sleeve retracts. Besides, a backwashing pipeline and a valve are arranged, linkage control is carried out when the control unit detects that expansion of the sleeve exceeds the limit, and ultrafiltration produced water stored on the nanofiltration side is reversely pushed by utilizing pressure energy released by retraction of the sleeve so as to backwash an ultrafiltration membrane. According to the invention, the cooperation of pressure buffering, online cleaning of the nanofiltration membrane and energy storage backwashing of the ultrafiltration membrane is realized, the operation is stable, the efficiency is high, and the energy is saved.

The present invention provides a method for producing extracellular vesicles, the method including a step for passing a crushed liquid of plants, mushrooms, or microalgae through a depth filter, and a step for subjecting the crushed liquid after passing through the depth filter to ultrafiltration treatment, the depth filter being composed of filaments.

The invention discloses a preparation method and application of a mulberry leaf extract with high stability and high activity in a protein food system, and belongs to the field of food processing and nutrition and health. The mulberry leaf extract is prepared by taking mulberry leaves as a raw material through steam explosion and ball milling pretreatment, compound enzyme directional enzymolysis, ultrasonic-assisted extraction, protein-induced sedimentation combined with ultrafiltration membrane selective impurity removal, compound stabilization treatment and drying. The obtained extract is rich in 1-deoxynojirimycin (DNJ) and mulberry leaf polysaccharide, high-polymerization-degree polyphenol is remarkably removed, and high clarity and heat stability are achieved. The DNJ retention rate gt is obtained after the milk is stored at 37 DEG C for 7 days when the milk protein is applied to a milk system; and therefore, the product prepared by the method is obviously superior to the product prepared by the prior art. The extract is pure in flavor and high in biological activity, and can be widely applied to the field of healthy foods such as dairy products and protein beverages.

The invention discloses a corn peptide for dispelling effects of alcohol and protecting liver as well as a preparation method and application thereof, and belongs to the technical field of biological peptide extraction. The preparation method comprises the following steps: crushing and sieving corn, dissolving the corn in deionized water, adjusting the pH value to be alkaline, and performing ultrasonic-assisted extraction to obtain corn homogenate; centrifuging, taking supernate, adjusting the pH to be neutral, centrifuging, adding an ethanol solution with the mass fraction of 10%, standing, carrying out continuous flow centrifugation, suspending precipitates in distilled water, dialyzing in a dialysis bag, and freeze-drying to obtain crude corn protein; the preparation method comprises the following steps: preparing an aqueous solution, carrying out variable-temperature treatment, adjusting the pH value to be alkaline, adding trypsin and alkaline protease, carrying out enzymolysis, repeating the enzymolysis twice, and after the enzymolysis is finished, carrying out heating enzyme deactivation, centrifugation, sediment discarding, ultrafiltration, centrifugation, supernatant taking and spray drying to obtain the corn peptide. The corn peptide can remarkably shorten the drunkenness time and sobering time of mice and reduce the drunkenness duration, and has good effects of dispelling the effects of alcohol and protecting the liver.

The invention relates to the technical field of hemodialysis, and discloses a hemodialysis ultrafiltration amount adjusting system based on multi-parameter self-adaptive control, which is used for solving the problem of insufficient prediction and prevention precision of a hemodialysis induced hypotension risk in a traditional system. According to the method, firstly, multi-parameter physiological data of the blood volume, the blood pressure and the ion concentration are synchronously collected in the whole dialysis process, then a physiological state data set is constructed through unified standardization and correlation matching, related change modes of the blood volume and the blood pressure are extracted, and ion deviation is superposed to form comprehensive risk characteristics; the risk characteristics are compared with a preset threshold value through trend analysis, the weight of each risk component is adjusted in a self-adaptive mode, a hypotension risk trend index is generated, the ultrafiltration rate is dynamically adjusted in a graded mode according to the indexes, the indexes are coupled with a real-time physiological data feedback closed loop, and therefore the prediction precision and the regulation and control refinement level of dialysis-induced hypotension are improved.

A method of preparing a polyamide membrane with multi-level pore structure mediated by protein fiber network includes the steps of: preparing protein fiber; quenching and carrying out dialysis; loading protein fiber network on ultrafiltration membrane; preparing aqueous and organic phase solutions; and carrying out interfacial polymerization, which can solve the problems of the integrity and separation performance of the polyamide layer being affected by low porosity of the base membrane and uneven distribution of amine monomers. The polyamide membrane prepared by the method of the present invention greatly improves the water flux while ensuring a high salt rejection rate. At the same time, the introduction of the protein fiber network also enhances the mechanical strength and anti-pollution ability of the membrane.

The invention belongs to the technical field of membrane separation, and particularly relates to a method for preparing a high-flux hollow fiber nanofiltration membrane based on interfacial polymerization, the obtained membrane and application. The method comprises the following steps: firstly, carrying out pre-adsorption treatment on a polyethersulfone hollow fiber ultrafiltration base membrane through a polyethyleneimine aqueous solution to form a reactive anchoring layer; then sequentially dipping in an aqueous phase solution containing piperazine, sodium phytate and nanoscale cellulose whiskers and an organic phase solution containing trimesoyl chloride and 5-isocyanate isopeptide acyl chloride for interfacial polymerization; and finally, carrying out heat treatment on the obtained primary composite membrane, and completing a gas-phase cross-linking reaction in a glutaraldehyde steam atmosphere. According to the method, the hollow fiber nanofiltration membrane with high flux, high selectivity, excellent chlorine resistance and pollution resistance is successfully prepared through a multi-stage strengthening process, and the hollow fiber nanofiltration membrane is suitable for the fields of drinking water purification, industrial wastewater reuse, material separation and the like.

The application discloses a preparation method of a hydrophilic oil-water separation anti-pollution membrane and the anti-pollution membrane and application thereof, and prepares MNRs material; the MNRs material is dispersed in dimethylacetamide, is uniformly stirred, polyvinylpyrrolidone is added, and stirring is continued, and a first mixture is obtained through ultrasonic treatment; the first mixture is mixed with polyvinylidene fluoride to obtain a second mixture, and the second mixture is stirred; the treated second mixture is dip-coated on a carrier, the dip-coated carrier is treated in deionized water to obtain an ultrafiltration membrane; the ultrafiltration membrane is soaked in a tea polyphenol solution with a Tris-HCl buffer solution, and is shaken to obtain the hydrophilic oil-water separation anti-pollution membrane. The hydrophilic oil-water separation anti-pollution membrane has excellent separation efficiency and flux recovery rate for four different oil-water mixtures of kerosene, gasoline, edible oil and n-hexane. The preparation process of the oil-water separation membrane is simple, the cost is low, and the reaction condition is mild; when the oil-water separation membrane is applied to organic wastewater separation, the oil-water separation membrane has the advantages of high efficiency, good removal performance and good recycling performance.

The invention discloses efficient energy-saving reciprocating type integrated ultrafiltration equipment which comprises an ultrafiltration membrane group box body and a circulating pipeline, the ultrafiltration membrane group box body internally comprises a plurality of membrane assembly membrane collecting frames, and a driving assembly for driving each membrane assembly membrane collecting frame to synchronously reciprocate is arranged behind each of two sides of the top of the ultrafiltration membrane group box body. According to the efficient energy-saving reciprocating type integrated ultrafiltration equipment, reciprocating motion of the low-power motor is adopted as an anti-pollution measure of the ultrafiltration membrane, operation energy consumption is effectively reduced, meanwhile, the efficient energy-saving reciprocating type integrated ultrafiltration equipment is matched with a high-quality ultrafiltration membrane material, so that the efficient energy-saving reciprocating type integrated ultrafiltration equipment has high filtering efficiency, a water treatment task can be rapidly completed, and the water treatment efficiency is improved. And the requirements of modern industrial production on high efficiency, energy conservation and environmental protection are met.

The invention discloses a preparation method of deer spleen aminopeptide powder in the field of bioactive substance extraction and functional material compositing, and the performance of the deer spleen aminopeptide powder is improved by compositing a multi-stage functional modified material and deer spleen aminopeptide. The preparation method comprises the following steps: cleaning, homogenizing and crushing fresh deer spleen, extracting with a phosphate buffer solution, adjusting the pH value, carrying out enzymolysis, inactivating enzyme, and treating with an ultrafiltration membrane and a nanofiltration membrane in a specific molecular weight range to obtain a concentrated solution; and mixing the concentrated solution with a multi-stage functional modified material under proper conditions, sterilizing, pre-freezing, and freeze-drying to obtain the deer spleen aminopeptide powder. Wherein the modified material is constructed through quaternization modification, nanopore loading, enzyme inhibitor coupling and targeting ligand modification, and has the functions of charge repulsion, steric hindrance, enzyme inhibition and targeting recognition. The deer spleen aminopeptide powder prepared by the invention has high stability and good bioavailability, and is suitable for functional food or health care products.

The invention discloses a hollow fiber nanofiltration membrane based on interfacial polymerization regulation and a preparation method thereof. The method comprises the following steps: preparing a water phase system and an oil phase system, and sequentially injecting the water phase system and the oil phase system into a hollow fiber ultrafiltration membrane; performing interfacial polymerization reaction on the water phase system and the oil phase system on the surface of the hollow fiber ultrafiltration membrane; and drying to obtain the hollow fiber nanofiltration membrane. By adopting the method, the interception performance and flux of the nanofiltration membrane can be effectively adjusted, and the stability and applicability of the nanofiltration membrane are improved. The nanofiltration membrane is low in water contact angle and high in oil contact angle. Particularly, the surface porosity, the effective aperture, the sodium sulfate retention rate, the sodium chloride retention rate, the flux of sodium sulfate, the flux of sodium chloride and other properties of the nanofiltration membrane can be designed and accurately controlled according to requirements, and the properties of the nanofiltration membrane can be accurately designed and customized by adopting the method disclosed by the invention; the performance of the green and natural modified hollow fiber ultrafiltration membrane is realized, and an innovative solution is provided for high-salt resource recovery.

The invention provides an efficient softening and hardness-removing process for a high-hardness water body, which is applied to the technical field of water body purification. The efficient softening and hardness-removing process comprises a pretreatment mechanism, a softening reaction mechanism, a flocculent precipitation mechanism and a sludge closed-loop treatment mechanism which are sequentially connected along a water body treatment flow direction, the efficient softening and hardness-removing process for the high-hardness water body comprises the following raw water treatment steps: S1, treating raw water by virtue of the pretreatment mechanism, so as to obtain ultrafiltration effluent; and S2, the ultrafiltration effluent enters the softening reaction mechanism, and under the control of the electric cabinet control mechanism, chemicals are added for softening and flocculation reaction. The total hardness removal rate can reach more than 90% through accurate addition of the medicament, two-stage pH control and optimization of reaction conditions, which is far superior to that of a traditional resin ion exchange method, the influence of high-hardness water discharge on receiving water is reduced, ecological and health problems caused by excessive hardness of the water are avoided, and the harsh requirements of industrial production and environmental protection on soft water are met.

The invention discloses a temperature-sensitive hydrogel loaded with mesenchymal stem cell exosome as well as a preparation method and application of the temperature-sensitive hydrogel, and belongs to the technical field of biological medicines. The method comprises the following steps: (1) adding poloxamer 407 into a pre-cooled dispersion medium to enable the final mass concentration to be 20-30%, and oscillating and dissolving at 4 DEG C overnight to obtain poloxamer hydrogel; (2) collecting a mesenchymal stem cell culture supernatant, and then centrifuging, wherein the centrifuging condition is 200 * g * 15 minutes to 2000 * g * 20 minutes to 12000 * g * 20 minutes; filtering the supernatant, concentrating by using an ultrafiltration tube, further performing ultracentrifugation on the concentrated solution, re-suspending the precipitate by using DPBS, centrifuging again, and re-suspending the finally obtained exosome precipitate by using DPBS to obtain an exosome suspension; the ultracentrifugation condition is as follows; and (3) taking the poloxamer hydrogel prepared in the step (1), adding the exosome suspension obtained in the step (2) under an ice-water bath condition, and uniformly mixing to obtain the poloxamer temperature-sensitive hydrogel.

The invention provides a dye / ion separation membrane with pore diameter and charge coordinated regulation and control as well as a preparation method and application thereof, and belongs to the field of preparation of a double-layer ionic covalent organic framework (COFs) composite membrane. An aromatic polyamide ultrafiltration membrane is used as a base membrane, and a double-layer COFs membrane is constructed on the surface of the aromatic polyamide ultrafiltration membrane through a multi-time interfacial polymerization method. The first layer is a positive charge COFs layer formed by reacting a guanidyl monomer with 1, 3, 5-triformyl phloroglucinol (Tp); and the second layer is a negative charge COFs layer formed by reacting ionic aromatic diamine with Tp. By adjusting the type and concentration of the monomers, the pore diameter and charge distribution of the film layer can be synergistically regulated and controlled, and the double-layer composite film which is stable in structure and orderly stacked is constructed. The obtained membrane has molecular sieve separation and electrostatic regulation functions, can efficiently intercept organic dye molecules in high-salt printing and dyeing wastewater, and has high flux, high selectivity and good chemical stability.

The invention discloses a method for separating an egg white polypeptide chain by adopting a coupling membrane, and particularly relates to the field of egg white polypeptide chains, the method comprises the following steps: S1, mixing fresh egg white with a buffer solution, adjusting the initial acid-base environment and initial temperature of a system, and measuring key basic parameters after dispersion treatment; s3, introducing the pretreated egg white liquid into a first-stage membrane assembly, monitoring separation process parameters, obtaining interception efficiency, dynamically adjusting operation parameters, and enabling permeate liquid to enter a second-stage membrane assembly; s7, monitoring system environment parameters and polypeptide activity, obtaining an activity retention rate, dynamically adjusting supply parameters, and maintaining the polypeptide activity; s8, classifying and collecting products according to molecular weight intervals, evaluating comprehensive separation efficiency, completing separation and verifying product indexes; by constructing an ultrafiltration membrane-nanofiltration membrane-reverse osmosis membrane three-stage coupling separation system and combining a dynamic parameter adjustment mechanism based on interception efficiency, separation selectivity and refined purity, the purity and separation efficiency of a polypeptide product are remarkably improved.

The utility model provides a system for directly recycling wastewater of a medium-high pressure boiler. The system comprises a collecting and regulating tank, a heat exchanger, a coagulation clarifier, a multi-medium filter, an ultrafiltration system, a secondary reverse osmosis system, an EDI (Electronic Data Interchange) device, a mixed bed and a user high-purity water tank which are connected in sequence, the second-stage reverse osmosis system comprises a first-stage reverse osmosis system and a second-stage reverse osmosis system, the first-stage reverse osmosis system comprises a first-stage RO raw water tank, a precision filter and a first-stage RO device, effluent of the ultrafiltration system enters the first-stage RO raw water tank and then enters the precision filter to be filtered, and water produced by the precision filter is fed into the first-stage RO device; the second-stage reverse osmosis system comprises a second-stage RO raw water tank and a second-stage RO device, fresh water produced by the first-stage RO device is fed into the second-stage RO raw water tank and then enters the second-stage RO device, and fresh water produced by the second-stage RO device is fed into the EDI device to be treated. According to the utility model, a full-flow treatment system is developed aiming at the water quality condition of the wastewater of the medium-high pressure boiler, and the finished water can stably meet the water supply requirements of the medium-high pressure boiler.

The invention discloses a method for preparing a vanadium electrolyte by electrochemistry-ultrasonic synergistic reduction of a waste vanadium catalyst in the technical field of solid waste resource utilization, which comprises the following steps of: roasting the waste vanadium catalyst by NaOH and leaching by sulfuric acid, applying 80Hz pulse current by adopting a titanium-based lead dioxide anode and a graphite cathode in a three-chamber electrolytic bath, synchronously starting a 25kHz and 300W ultrasonic field for synergistic reduction, and controlling the reaction temperature to be 35 + / -2 DEG C until the V < 5 + > concentration is less than 0.05 g / L; and then adding a chitosan-tea polyphenol composite stabilizer, and concentrating through a PVDF (Polyvinylidene Fluoride) ultrafiltration membrane to obtain electrolyte with the vanadium concentration of 1.8 mol / L, wherein the molar ratio of V < 4 + > to V < 3 + > is 1: 1.2, Fe < 3 + > is less than 15 ppm, and Al < 3 + > is less than 10 ppm. In the process, the vanadium recovery rate reaches 95.2%, the energy consumption is 2.8 kWh / kg vanadium and is reduced by 65% compared with that of a traditional process, and the cycle life of the electrolyte is prolonged to 1200 times or above.

The invention discloses a fluorine-containing wastewater advanced treatment system and a fluorine-containing wastewater advanced treatment method based on cooperation of chemical precipitation and a membrane method. Comprising a sedimentation tank, a dynamic filter and a double-membrane system which are arranged in sequence, wherein in the sedimentation tank, a modified calcium salt precipitator and CaF2 seed crystals are added into the fluorine-containing wastewater for reflux, and large calcium fluoride particle precipitates are formed through an induced crystallization adsorption-sedimentation mechanism; the dynamic filter is used for intercepting sediments from effluent of the sedimentation tank through a gradient aperture structure to realize solid-liquid separation and preliminary fluorine removal; and the double-membrane system is used for removing residual fluorine-containing particles, colloids and ions in the wastewater treated by the dynamic filter by utilizing an ultrafiltration membrane and a reverse osmosis membrane. Through cooperation of a modified calcium salt adsorption-precipitation mechanism and a membrane gradient interception method, efficient trapping and solid-liquid separation of fluorine ions are achieved, the fluorine removal precipitation reaction is enhanced, the medicine consumption is reduced, and near-zero external water consumption is achieved.

The utility model discloses a central water treatment filtering device for desalted water production. A raw water inlet pipe of a reservoir is communicated with a water inlet pipeline of each filter; the ultrafiltration processors are connected in series; a water outlet of each filter is communicated with a water inlet pipeline of the first-stage ultrafiltration treater; a water outlet of the N-stage ultrafiltration treater is communicated with a water inlet pipeline of the filtered water storage tank; a water outlet of the filtered water storage tank is communicated with a water inlet pipeline of the primary reverse osmosis processor; all stages of reverse osmosis processors are connected in series, and water outlets of the N stages of reverse osmosis processors are communicated with a demineralized water storage tank pipeline. According to the device, the content of various pollutants in water entering the ultrafilter can be reduced, a filter element for ultrafiltration and reverse osmosis can be protected, the content of various impurity ions in the water after ultrafiltration is reduced, the conductivity of produced water is about 10 us / cm, the hardness is 0.01 mol / L or below, the produced water is used for supplementing water for a steelmaking and steel rolling heating furnace, and generated steam can be used for power generation of a steam turbine. Water consumption is reduced, resources are saved, and the accumulation speed of scale in the boiler is effectively reduced.

The precise molecular sieving architectures with Janus-like characteristics via an interpenetrating polymer network combining the hydrophilic cPI polymer and hydrophobic microporous covalent organic framework (COF) exhibit super-high permeances for both polar and nonpolar solvents. A unidirectional diffusion and convection process significantly speeds up chemically stable COFs with uniform and tailorable channels growing on polymeric hollow fibre that can efficiently separate organic solvents under ultrafiltration conditions.

The invention discloses an abelmoschus manihot exosome extraction process, and relates to the field of extraction and purification in biotechnology, and the abelmoschus manihot exosome extraction process comprises the following steps: (1) providing a fresh flower material of abelmoschus manihot, and carrying out mechanical cleaning and surface impurity removal; and (2) homogenizing the cleaned fresh flowers of the abelmoschus manihot for 5-30 minutes by a high-shear homogenizer under the condition that the rotating speed is 8000-15000rpm to obtain homogenate. The method is specially designed for the physiological characteristics of the fresh flowers of the abelmoschus manihot, and through the core principle of'rapid treatment and low-temperature operation ', the activity loss of the exosomes in the extraction process is reduced to the greatest extent, so that the yield of the exosomes is increased, and the yield of the abelmoschus manihot is increased. The method ensures the integrity of the natural structure and function, creatively adopts a process route of combining continuous flow centrifugation and multistage tangential flow ultrafiltration, realizes continuous and efficient separation and purification of exosomes from a large number of plant raw materials, solves the industrial bottleneck that a traditional ultracentrifugation method cannot realize large-scale production, and is suitable for industrial production. And the treatment capacity can easily reach 5-15 tons of fresh flowers per day.

The invention particularly relates to a ginseng peptide with anti-aging activity and a preparation method and application thereof, and belongs to the technical field of bioactive peptides. The method comprises the following steps: by taking ginseng fibrous roots, ginseng leaves and other by-products as raw materials, carrying out weak acid ultrasonic pretreatment, loading natural anti-aging active components, carrying out low-temperature high-pressure homogenization and airflow crushing synergistic treatment, carrying out double-stage composite enzymolysis, clarifying with an alternating electric field ceramic membrane, carrying out five-stage series ultrafiltration classification, carrying out four-stage filter element sterilization, freeze-drying and the like in sequence. The high-purity ginseng peptide is prepared. The total nitrogen content of the prepared ginseng peptide is larger than or equal to 14.8%, the proportion of a target peptide fragment is larger than or equal to 97.2%, the yield is larger than or equal to 18.5%, and the ginseng peptide has good antioxidant and anti-aging activity and can be used for development of functional food and skin care products. The method is low in cost, high in resource utilization rate and green and efficient in process, and the product purity and activity are remarkably superior to those of a traditional method.

The invention discloses a waste sulfuric acid treatment method and device, the device comprises a sintered filter element filter, a fine filtration coalescer, an adsorption tank and a membrane separator which are connected in sequence, and the fine filtration coalescer adopts a ceramic membrane tube or a polytetrafluoroethylene membrane tube or a silicon carbide lining membrane tube as a filter material; an adsorption material in the adsorption tank is one or a combined adsorption material of more than two of activated carbon, a modified molecular sieve, a metal organic framework material and a nano adsorption material; and the membrane separation system adopts one or a combined membrane of more than two of an ultrafiltration membrane, a reverse osmosis membrane and an electrodialysis membrane. The alkylation waste acid regeneration process can be simplified, the occupied area of the device is saved, the engineering investment is reduced, and the operation cost is greatly reduced compared with that of an existing process technology; according to the method, a physical separation means is adopted, organic polymeric oil, dissolved organic matters, dissolved salts and other impurities in the alkylated waste sulfuric acid can be effectively removed without decomposing and reconstructing the waste sulfuric acid, and the concentrated sulfuric acid after concentration completely meets the production requirements of an alkylation device.

The invention provides low-molecular-weight tea polysaccharide and a preparation method and application thereof, and belongs to the technical field of tea polysaccharide extraction.The preparation method of the low-molecular-weight tea polysaccharide comprises the following steps that 1, tea powder, compound enzyme and water are mixed to obtain an enzymolysis system, and enzymolysis is conducted to obtain enzymatic hydrolysate; 2) performing ultrasonic-microwave synergistic extraction on the enzymatic hydrolysate, and then boiling and extracting to obtain an extracting solution; (3) inoculating compound microorganisms into the extracting solution, and fermenting to obtain fermentation liquor; 4) performing ultrafiltration and concentration on the fermentation liquor to obtain a tea polysaccharide solution; 5, the tea polysaccharide solution is subjected to affinity membrane chromatography and elution, eluent is subjected to reverse filtration through a nanofiltration membrane, trapped fluid is collected, and the low-molecular-weight tea polysaccharide is obtained.The molecular weight of the low-molecular-weight tea polysaccharide ranges from 2 KDa to 5 KDa, and the low-molecular-weight tea polysaccharide can be more easily absorbed by the human body and has the effect of rapidly and remarkably adjusting blood sugar.

The present application provides a kind of Radix Polygoni Multiflori active ingredient separation and purification process, belong to plant extraction technical field.The present application separation and purification process includes: Radix Polygoni Multiflori ethanol ultrasonic extraction, activated carbon adsorption, HPD-100 macroporous resin purification, membrane filtration, ultrafiltration, reduced pressure concentration and crystallization step, can efficiently extract Radix Polygoni Multiflori extract with high 5 alpha-reductase inhibitory activity.After compounding with the extract of Euonymus alatus obtained by specific microbial fermentation, the anti-hair loss effect can be significantly enhanced.The in vitro experimental results show that the Radix Polygoni Multiflori extract and the extract of Euonymus alatus both have significant 5 alpha-reductase inhibitory activity.The present application can effectively promote hair growth and improve hair loss, and the effect is close to the positive control drug.The present application process is stable, high in purity, strong in activity, suitable for industrial production, and has good market application prospect.

The utility model discloses a low-temperature-resistant ultrafiltration water purification device which comprises a water inlet, a water inlet pump, a primary filter, an ultrafiltration membrane assembly, an anti-freezing glycerol tank, an activated carbon filter, a produced water outlet and a waste liquid discharge pipe, the water inlet is connected with a water inlet pump; the water inlet pump is connected with the primary filter; the primary filter is respectively connected with the anti-freezing glycerol tank and the active carbon filter; the ultrafiltration membrane assembly is connected with the active carbon filter; an ultraviolet sterilizer is arranged between the activated carbon filter and the produced water outlet; the water inlet, the primary filter, the ultrafiltration membrane assembly, the anti-freezing glycerol tank, the activated carbon filter and the ultraviolet sterilizer are all connected with a waste liquid discharge pipe. Enough pipeline pressure is ensured while the water purification effect is ensured; each key node of the device is provided with a pressure relief pipeline connected with a waste liquid discharge pipe, so that the risk caused by excessive pressure is avoided; and the anti-freezing glycerol tank is arranged and is matched with a valve switch to perform pipeline anti-freezing operation, so that the cold resistance of the device is improved.

The invention provides a preparation method and application of anti-aging and cell-repairing pancreas biological zymolyte, and relates to the technical field of enzyme viscera extracts. The preparation method comprises the following steps: pretreating pancreas, adding water, pulping, boiling, cooling to room temperature, and adjusting the pH value; adding alkaline protease, heating for enzymolysis, dynamically adjusting the temperature and pH during enzymolysis, and inactivating after enzymolysis is finished to obtain enzymatic hydrolysate; adding a reducing agent into the enzymatic hydrolysate, then adding staphylococcus xylosus liquid, carrying out two-stage fermentation, taking supernate after fermentation is finished, and carrying out ultrafiltration concentration; the staphylococcus xylosus bacterial liquid is produced from staphylococcus xylosus YB-12, the staphylococcus xylosus YB-12 is preserved in the China General Microbiological Culture Collection Center on January 3, 2023, and the preservation number of the staphylococcus xylosus YB-12 is CGMCC No. 26373. The finished product prepared by the method is high in stability; meanwhile, the zymolyte can be applied to cell repair or anti-aging.

The invention discloses an acid-resistant nanofiltration membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The gradient heterojunction active layer is formed on the base film through sequential interfacial polymerization and comprises a polysulfonamide bottom layer adjacent to the base film and a polyamine-metal organic framework composite layer located on the polysulfonamide bottom layer; the gradient heterojunction active layer is coated with the pH response self-repairing layer, and the self-repairing layer comprises pH response type microcapsules dispersed in cross-linked polyvinyl alcohol hydrogel; the membrane has excellent self-repairing capability and maintenance convenience, the repairing efficiency of artificial microcosmic damage in an acid environment within 24 hours can reach 85% or above, tiny scratches and defects generated in the operation or installation process of the membrane can be automatically repaired, the failure of the whole membrane element caused by tiny damage expansion is avoided, and the service life of the membrane element is prolonged. And the unplanned shutdown risk and the special repair and maintenance cost are reduced.

The invention relates to the technical field, and discloses a product dehydration optimization method based on an inclined box dense grader and an HNS ultrafilter, which comprises the following steps: introducing slurry into a vibration inclined box dense grader through a feed distribution system, and dynamically adjusting the vibration frequency, amplitude and period by combining an intermittent vibration system and a slurry concentration detection control system, the concentration self-adaptive control is realized; overflowing slurry is conveyed into an HNS ultrafilter through a slurry conveying system, and efficient separation is achieved through a centrifugal force field and cross flow filtration; the filtrate is shunted by a clear water self-circulation system and is used for process recycling and equipment cleaning; and the concentrated discharged slurry of the HNS ultrafilter and the underflow of the thickener are mixed and output or return to the previous process. The general drawing arrangement is optimized, the slurry dehydration efficiency is improved, and valuable metal is recycled to the maximum extent.