43 results about "Ultrafiltration" patented technology

The invention discloses a preparation method for a polyether sulfone/graphene oxide composite ultrafiltration membrane. The preparation method comprises the following steps of ultrasonically dispersing the graphene oxide into an organic solvent to form uniform and stable dispersing liquid; adding polyether sulfone and additive into the dispersing liquid; stirring, dissolving, standing and defoaming to form uniform and stable casting membrane liquid; pouring the casting membrane liquid on a glass plate; scraping the membrane; and immersing into coagulating bath at room temperature to obtain the polyether sulfone/graphene oxide composite ultrafiltration membrane after the membrane is removed automatically, wherein the casting membrane liquid comprises the following components as per mass percentage concentration: 15 to 21 percent of polyether sulfone, 1 to 2 percent of pore-forming agent and 0.5 to 4.0 percent of graphene oxide. The polyether sulfone/graphene oxide composite ultrafiltration membrane has high hydrophilcity, high porosity, static resistance, elasticity and the like and improves the flux of pure water, retention rate, pollution resistance, mechanical property and the like.

The invention relates to a system for preparing potassium sulfate from high-salt-content industrial wastewater and belongs to the field of water treatment. The high-salt-content industrial wastewater is pretreated through a regulating pool, a pipeline mixer, a high-density precipitate pool, a V-type filter pool, ion exchange resin and an ultrafiltration membrane system and then concentrated through a first section reverse osmosis membrane system and a second section reverse osmosis membrane system and then enters a nanofiltration membrane system for salt separation, nanofiltration produced water and thick water enter a plate-pipe type high-pressure flat sheet membrane system II and a plate-pipe type high-pressure flat sheet membrane system I respectively to be concentrated again, the concentrated thick water enters a freezing crystallization system for crystallization, crystals enter a potassium sulfate preparing system to be converted, freezing mother liquor and the concentrated nanofiltration produced water enter an advanced oxidizing system for oxidation and then enter an evaporative crystallization system for crystallization, and produced sodium sulfate crystal salt enters a potassium sulfate preparing system for conversion. The system has the advantages that the scale of the nanofiltration system is reduced, and investment cost is reduced; salt separation is thorough, and operation cost is low; the purity of the crystallization salt is high; mirabilite and sodium sulfateare converted into potassium sulfate, and the economic value is improved.

A process for extracting heparin sodium from pig lungs and co-producing polypeptide protein powder. Two products of heparin sodium and polypeptide protein powder can be obtained at the same time with one feeding. It includes the following steps: (1) raw material pretreatment; (2) enzymatic hydrolysis; (3) salt hydrolysis twice; (4) slag (protein) removal and clear liquid collection; (5) ultrafiltration and concentration to remove ash; (6) Ammonium salt precipitation; (7) precipitation of heparin sodium, and vacuum drying to obtain crude heparin sodium; (8) enzymatic precipitation; (9) decolorization; (10) pressure filtration; (11) spray drying. The process is co-production, which has a higher utilization rate of equipment than a single production process, saves raw materials, auxiliary materials, and manpower, and can reduce the production cost of heparin sodium and polypeptide protein powder; make full use of my country's pig lung resources to increase the added value of pig lung; reduce protein-containing waste Liquid waste slag pollutes the environment, and turning waste into treasure is an effective way to supplement the shortage of protein feed resources in our country.

A xylose production process utilizes corn cobs as raw materials and sequentially comprises the steps of steam explosion, hydrochloric acid hydrolysis, solid-liquid separation, decoloring neutralization, ultrafiltration, electrodialysis desalination, low-pressure reverse osmosis membrane concentration, medium-pressure reverse osmosis membrane concentration, MVR evaporation and concentration, chromatographic refined desalination and purification, ion exchange resin refining, concentration, crystallization, centrifugation and drying, and finally a xylose product is obtained. The xylose production process reduces the energy consumption in xylose production and reduces the pollution.

The invention discloses a treatment method of landfill leachate. The treatment method comprises the following steps: adding a flocculating agent and a coagulant aid into the landfill leachate for full reaction, and separating to obtain first treatment fluid; adding an oxidant for full reaction, and obtaining second treatment fluid; adding a water softening agent for full reaction, and obtaining third treatment fluid; performing triple effect evaporation on the third treatment fluid to obtain condensed fluid; performing A2/O technological treatment on the condensed fluid, and filtering to obtain fifth treatment fluid; performing sand filtration, carbon filtration, ultrafiltration and RO (Reverse Osmosis) membrane treatment on the fifth treatment fluid in sequence to obtain sixth treatment fluid. According to the treatment method of the landfill leachate, all the indexes of the sixth treatment fluid obtained by treating the leachate of a waste landfill meet a discharging standard, so that the landfill leachate can be discharged with the standard level; the landfill leachate can be harmless and recycled to the maximum extent.

The invention relates to a traditional Chinese medicine preparation device and method, and particularly relates to a traditional Chinese medicine preparation device and method integrating the extraction, concentration and drying processes of a traditional Chinese medicine. The traditional Chinese medicine preparation method comprises the following steps: 1) extracting the traditional Chinese medicine; 2) coagulating; 3) standing and stratifying; 4) filtering with an ultrafiltration membrane device; and 5) filtering with a nanofiltration membrane assembly. The traditional Chinese medicine preparation device mainly comprises an active mass extraction device, a coagulation and stirring device, a solid-liquid separation device, a pressure filtration pump, the ultrafiltration membrane device, a backwash pump, a buffer tank, a high pressure pump, the nanofiltration membrane assembly, a concentration tank and a pipeline. The whole device has the advantages of simple structure, fewer required components, low energy consumption, sanitary operation and high production efficiency, and integrates the extraction, separation and concentration processes.

The invention relates to a capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane, which is prepared through the steps of mixing capsaicin functional-group containing polymers with a hydrophilic agent and a membrane casting solution; then, carrying out treatment on the obtained mixture by using an immersion phase inversion method. Based on the biological resistance of natural antifouling active substances existing in nature, and through the addition of an appropriate hydrophilic agent, the invention provides a method for preparing a capsaicin functional-group containing hydrophilic anti-biological-contamination ultrafiltration membrane. An ultrafiltration membrane prepared by using the method disclosed by the invention is applicable to a water treatment process, so that both the separation performance of the membrane is ensured, and the anti-biological-contamination performance of a membrane module is significantly improved.

The invention discloses a cellulase separation and purification method. According to the method, fungus liquid deep layer fermentation cellulase fermentation liquid is subjected to plate frame filtering for removing large particle substances and hyphae in the fermentation liquid, the cellulase plate frame filter liquid is stored into a filter liquid storage tank, in order to avoid the enzyme activity loss, the low-temperature state is maintained, the cellulase plate frame filter liquid is subjected to ultrafiltration membrane concentration and is mixed with protecting agents of lactose and silicon dioxide, the uniform stirring is carried out, the mixed lactose materials pass through bacterium removing membrane equipment for filtering out sundry bacteria, bacterium removing cellulase enzyme material liquid is subjected to the spraying drying process to obtain cellulase powdery finished products. The cellulase powdery finished products separated and purified according to the method provided by the invention solve the problem of great loss of cellulase caused by sundry bacteria generated in the subsequent extraction process of the cellulase fermentation liquid, in addition, after the adoption of the protecting agent spraying, the spraying enzyme activity yield is improved by 18 percent, the cellulase yield of the whole purification process is improved by 23 percent, and the production cost is reduced.

The invention discloses a method for preparing a human prothrombin complex from a Cohn blood plasma component III. The method comprises the following steps: 1, dissolving the Cohn blood plasma component III; 2, sedimenting polyethylene glycol (PEG), and removing impure protein; 3, conducting S/D viral inactivation; 4, conducting strong anion-exchange column chromatography; 5, conducting ultrafiltration dialysis and concentration; 6, adding a stabilizing agent, and conducting adjustment; 7, conducting virus-removal filtration through nanofilms; 8, conducting sterilization, filtration and subpackage; 9, conducting freeze-drying; 10, conducting dry-heat viral inactivation. According to the method, efficient strong anion-exchange column chromatography is adopted, traditional batch processing gel adsorption is replaced, labor intensity of operation is greatly lowered, cross contamination problems caused by a batch processing method are avoided, meanwhile, in the whole production process, three steps of viral inactivation and removal measures are adopted for products, and the method has the advantages that the flow is brief and simple, the production cycle is short, operation is easy to conduct, and the products are safe and reliable to use.

The invention discloses a film treatment process for fatty acid wastewater. The invention aims to provide a novel recycling film treatment process for fatty acid wastewater. The process comprises the processes: oil-separating pre-treatment, film technical ultrafiltration, filter pressing, air-floating technology, evaporative treatment or biological treatment and the like. The wastewater treatment process disclosed by the invention adopts a process of a double film method combined with various treatment modes and adopts a process flow of gradually removal and extraction by many steps, so that harmless treatment of the wastewater or recycle of resources is finally realized. The wastewater treatment process disclosed by the invention solves a series of problems that the prior art is complex in process, the wastewater treatment effect is poor, great in difficulty and high in cost, the beneficial components in the wastewater cannot be recycled, the equipment is large in occupied area, the flocculant is liable to low temperature failure and the like.

The invention discloses a method for high-efficiency extraction of pumpkin pigments. The method is characterized by comprising the following steps: (1) extraction of pumpkin solution; (2) flocculation clarification; (3) enzymolysis reaction; (4) filtering treatment; (5) acylation reaction; and (6) preparation of pigment of 40 color value. According to the method, chitosan is used as a flocculation clarification agent, the yield of the product can be relatively improved, and the production cost is reduced; polyethylene glycol is used as the auxiliary solvent, the problem of poor solubility of the red pigments of natural pumpkin is well solved; due to reasonable addition of tartaric acid and ferulic acid, the problem of the stability of the finished product of the red pigment of pumpkin is solved; the adoption of the ultrafiltration technology can meet the needs of large-scale actual production; based on the method, the utilization rate of the raw material is high, the red pigment of pumpkin prepared according to the method not only has high color ratio but also has better properties, purity, stability and solubility and high comprehensive performance price ratio.

The invention discloses an efficient preparation method of low-value fish immunomdodulating peptides, relates to the development and utilization of low-value fish bioactive peptides and related anti-inflammatory drug products, and belongs to the technical field of low-value fish processing; the preparation method comprises the steps of preparing nemipterus virgatus myosin by a salt extraction method, fully expanding a high-spiral structural domain of myofibrillar protein by using a high-pressure homogenization method; fine-tuning a protein solution to pH 7.5, adding trypsin, performing enzymatic hydrolysis for 90 minutes, promoting an ultrafiltration membrane to separate a nemipterus virgatus protein enzymatic hydrolysate by using impressed current, and obtain a peptide fragment of 500 to3000 components; finally obtaining a powdery product by a freeze-drying method; the method can improve the degree of hydrolysis of the nemipterus virgatus myosin peptide, and the biological propertiesand yield of the immunomodulating peptides; the anti-inflammatory activity of the immunomodulatory peptides prepared by the method is better; the invention realizes the deep processing and comprehensive utilization of the low-value fish, and has important meaning for improving the added value of the low-value fish.

The invention belongs to the technical field of food biology, and discloses a soybean peptide with high ACE inhibitory activity, and a preparation method and application of the soybean peptide. The soybean peptide has the high ACE inhibitory activity, and the preparation method comprises the following steps of adding alkaline protease to soybean protein isolate for enzymolysis to obtain an enzymolysis product; separating the enzymolysis product with a membrane ultrafiltration method to obtain soybean peptide powder I; further purifying the soybean peptide powder I with an ethanol fractionationmethod to obtain soybean peptide powder II; and further separating and purifying the soybean peptide powder II by using active carbon adsorption chromatography to obtain the soybean peptide with thehigh ACE inhibitory activity. The soybean peptide has the excellent ACE inhibitory activity and the good blood pressure reducing effect, can be applied to the field of food and health products, and the preparation method is simple and controllable and is suitable for mass production in factories.

The invention discloses a preparation method for a purple sweet potato anthocyanin facial mask. The method comprises the following steps: 1) pre-treating fresh purple sweet potatoes; 2) adding acidified ethanol into the obtained purple sweet potato pulp, adding cellulase, performing ultrasonic treatment, performing sieving and filtering, performing separation and purification by macroporous resin,performing gradient elution, and performing concentration and drying to obtain a purple sweet potato anthocyanin extract; 3) performing enzymatic hydrolysis on silk, performing inactivation of enzyme, performing classification by ultrafiltration, and performing concentration and drying to obtain a silk fibroin peptide with a weight-average molecular weight of 2-10k; and 4) compounding the purplesweet potato anthocyanin extract and the silk fibroin peptide according to a ratio, adding other auxiliary materials, and performing uniform mixing to obtain the purple sweet potato anthocyanin facialmask. According to the method, the purple sweet anthocyanin extract obtained by pre-treating the purple sweet potatoes and performing extraction is compounded with the silk fibroin peptide accordingto the specific weight ratio, other auxiliary materials with a specific content are also used to prepare the purple sweet potato anthocyanin facial mask, and the obtained purple sweet potato anthocyanin facial mask is environmentally friendly and safe, and has excellent anti-acne, whitening, spot-fading and anti-wrinkle effects.

The invention relates to the technical field of water purification, and in particular relates to a method for preventing a whole-house separate purifying device film from being polluted. The method comprises the following steps of: 1) carrying out ultrafiltration membrane backwashing on a hollow fiber ultrafiltration membrane of ultrafiltration equipment through tap water, and then carrying out positive ultrafiltration membrane washing; and 2) carrying out positive spiral-wound membrane washing on a spiral-wound membrane of nanofiltration or reverse osmosis equipment through water. According to the method for preventing the whole-house separate purifying device film from being polluted, the hollow fiber is subjected to ultrafiltration backwashing, positive ultrafiltration washing and positive spiral-wound membrane (nanofiltration or reverse osmosis) washing by the raw water of tap water when in downtime in light of the polluting conditions of the hollow fiber ultrafiltration membrane and the spiral-wound membrane (nanofiltration membrane or reverse osmosis membrane) of a core component of a whole-house separate water supplying device, the serious pollution of the hollow fiber ultrafiltration membrane and the spiral-wound membrane (nanofiltration membrane or reverse osmosis membrane) can be effectively avoided, the stability of the system in running can be ensured, the service life of the reverse osmosis membrane is prolonged, and the operation cost of the system is reduced.

The invention provides a double-water-channel water purification tap combination filter element. After being installed to a purpose-made water tap, the filter element has double water channels, so the water without needs for filtration and water in demands for filtration independently exist in the two channels, thereby ensuring that the user can use the filter element at low cost. The filter element comprises a central tube, wherein the inner cavity of the central tube is a direct-flow water channel; a PP (polypropylene) filter bowl is sheathed on one end of the central tube; the rim of the PP filter bowl is arranged towards the other end of the central tube; the inner wall of the PP filter bowl is provided with a PP cotton prefilter piece; the inner wall of the rim of the PP filter bowl is connected with one end of an ultrafiltration membrane shell in a sealing mode; the upper part of the ultrafiltration membrane shell is provided with a sintered activated carbon rod; the sintered activated carbon rod is provided with a central inner hole; a connecting cover is arranged between the ultrafiltration membrane shell and the sintered activated carbon rod; ultrafiltration membrane yarn is arranged in the ultrafiltration membrane shell; and a water outlet of the inner cavity of the ultrafiltration membrane shell communicates with a water inlet of the connecting cover.

The invention relates to the field of aquiculture, particularly a young shrimp culture seawater circulating utilization plant and method. The young shrimp culture seawater circulating utilization plant comprises a young shrimp culture tank, a pressure pump, a biochemical ammonia nitrogen removal device, a mechanical filter and an ultrafilter, wherein the ultrafilter is provided with a sewage outlet and a pure water outlet; the sewage outlet communicates with the biochemical ammonia nitrogen removal device; and the pure water communicates with the young shrimp culture tank. The young shrimp culture seawater circulating method comprises the following steps: 1) pumping and pressurization: pumping out seawater in the young shrimp culture tank and pressurizing by the pressure pump, wherein the pressure is controlled at 3-5 MPa; 2) ammonia nitrogen removal: sending the pressurized seawater in the step 1) into the biochemical ammonia nitrogen removal device through the water inlet; 3) impurity removal: introducing the seawater treated by the step 2) into the mechanical filter to perform preliminary filtration; and 4) ultrafiltration and diversion: introducing the seawater obtained in the step 3) into the ultrafilter for filtration.

The invention discloses a method for treating sugar industry wastewater, which comprises the following steps of: (1) fetching the sugar industry wastewater, and adding a flocculant polyaluminium sulfate into the wastewater, wherein the added amount of the polyaluminium sulfate is 1.2-2.4wt% of the weight of the wastewater; (2) uniformly mixing and naturally settling, wherein the settling time is 5-7 hours; (3) after the settling, extracting the upper-layer supernate; (4) enabling the upper-layer supernate to pass through a filter membrane, wherein the molecular weight of the filter membrane is 10,000-30,000; (5) performing ultrafiltration on the permeate passing through the filter membrane with molecular weight of 10,000-30,000, wherein the molecular weight of the ultrafiltration membrane is 500-800; and (6) collecting the permeate to obtain the treated sugar industry wastewater. By adopting the treatment method disclosed by the invention, the CODcr (Chemical Oxygen Demand) value of the treated sugar industry wastewater is reduced from 2,730mg/L to 32-46mg/L, and the BOD (Biochemical Oxygen Demand) value is reduced from 1,869mg/L to 24-29mg/L.

The invention provides a preparation process of a rabies vaccine without antibiotic addition in the whole process from a cytotoxic strain source. A Vero cell pre-master cell bank, a master cell bank,a working cell bank, a CTN-1V strain pre-master seed batch, a master seed batch and a working seed batch are prepared by using a culture medium without antibiotic addition, a bioreactor and a flaky carrier are applied, and through performing pre-culture and perfusion culture on Vero cells, inoculating a working seed batch of rabies viruses, performing washing and exchanging, performing perfusion culture to obtain a virus solution, performing ultrafiltration concentration, performing inactivating, performing purifying, preparing a semi-finished product, performing subpackaging and performing freeze-drying, the rabies virus vaccine is obtained. By optimizing the process of the virus adding course of bioreactor culture, impurity residues in the rabies vaccine are effectively reduced, the residual quantity of bovine serum components, Vero cell DNA and Vero cell host proteins is reduced, compared with other vaccine products on the market, the prepared vaccine product has superiority in clinical trial safety, and the safety of biological products is ensured to the greatest extent.

The invention provides a resource utilization method of fructus momordicae industrial waste. The resource utilization method comprises the following steps of performing preprocessing, performing mixedenzymolysis with cellulases and papain, performing ultrafiltration, performing strong acidic cation exchange resin chromatography, and performing freeze drying to prepare fructus momordicae protein powder. According to the characteristic that waste liquid generated by production of fructus momordicae shows acidic, acidic cellulases and papain are directly used for treating waste liquid, the maneuverability is high, and the method is suitable for industrial production. Besides, the enzymolysis efficiency is improved, the purpose of turning waste into wealth is realized, the fructus momordicaeresources are comprehensively utilized, considerable economic benefits are created, and the problem of environmental pollution is also solved. Besides, the technology process of the method is low in cost, fructus momordicae protein is produced from the fructus momordicae waste liquid, and the method can be widely applied to trade of health-care products and pharmaceutical industry. Waste can be turned into wealth, and the waste liquid can be recycled, so that the added value of the fructus momordicae is increased.