468 results about "Microfiltration" patented technology

The invention discloses a purification device for aquaculture wastewater, and relates to the technical field of wastewater purification. Comprising a box body as well as a physical filter tank and a biochemical bacterium culture tank which are arranged in the box body, and further comprises a microfiltration assembly arranged in the physical filter tank, the microfiltration assembly comprises a filter cartridge rotationally connected to the interior of the physical filter tank, a backwashing pipe is fixedly connected to the interior of the physical filter tank, and a sewage collecting tank is arranged in the filter cartridge; a cleaning assembly matched with backwashing to improve the cleaning effect of the filter cartridge is arranged in the filter cartridge, the cleaning assembly comprises a floating plate arranged in the filter cartridge, a connecting rod slidably penetrates through the floating plate, and the upper end of the connecting rod penetrates through the dirt collecting tank and is fixedly connected with a first cleaning brush; stubborn attachments such as mycoderm and caustic soda attached to the inner wall of the filter cartridge can be brushed off by utilizing the first cleaning brush, and the cleaning effect on the filter cartridge can be improved by matching with backwashing, so that the attachments on the inner wall of the filter cartridge can be massively washed off, the backwashing period is shortened, and the blockage probability of the filter cartridge is reduced.

The utility model discloses a crystal film fluidized bed treatment system aiming at high-hardness water treatment, the system mainly comprises a crystallization fluidized bed and a multi-layer flat film microfiltration device, and the crystallization fluidized bed device is of an inner-layer and outer-layer cylinder structure and is provided with a slag discharge pipe, a water inlet pipe, an annular dosing pipe, an inclined pipe enhanced separation device and a water outlet pipe; the multi-layer flat membrane microfiltration equipment is provided with a water inlet pipe, a water outlet pipe, a buffer water tank, a cleaning mechanism, a metal membrane, a sludge tank and the like; when the system runs, high-hardness raw water firstly enters the crystallization fluidized bed for softening treatment, and then enters the multi-layer flat membrane microfiltration equipment for further removing hardness and turbidity after treatment; the adopted system combining the crystallization fluidized bed and the flat membrane microfiltration equipment can effectively remove the hardness and turbidity of water, flocculation and coagulation agents do not need to be added, the adverse effect of the coagulation agents on a subsequent membrane system is effectively avoided while the operation cost of the system is reduced, the hardness and turbidity of the water can be effectively removed, and the service life of the system is prolonged. Various ions in the water are synchronously removed.

The invention discloses a protein separation method and related application thereof, and relates to the technical field of dairy product processing, the method comprises the following steps: heating a whey solution of which the pH value is adjusted to 3.5-4.2 by a citric acid solution, carrying out microfiltration on the heated product, carrying out beta-lactoglobulin and / or alpha-lactalbumin separation on permeate and trapped fluid obtained by microfiltration, the method is based on the membrane filtration technology, high-purity separation of beta-lactoglobulin and alpha-lactalbumin is achieved, the purity can reach 70%-90% or above, the method is compatible with whey from multiple sources, equipment is simple, the method has the advantages of being low in separation cost, high in efficiency, easy to implement, large in flux and the like, and a way is provided for large-scale industrial production of beta-lactoglobulin and alpha-lactalbumin.

The invention belongs to the technical field of aquaculture equipment, and particularly relates to circulating water microfiltration equipment and a cleaning method thereof. Circulating water microfiltration equipment comprises a first shell, a filtering assembly, a cleaning assembly and a dirt collecting assembly. The filtering assembly is used for filtering tail water. The cleaning assembly comprises a water inlet pipe and a cleaning pipeline, the cleaning pipeline is provided with a plurality of cleaning nozzles, and the plurality of cleaning nozzles are all aligned with the filter vat and can perform back-flushing operation on the filter vat. The dirt collecting assembly comprises a dirt collecting frame, a scraping plate and a dirt collecting box. The dirt collecting frame is used for collecting impurities on the filtering barrel flushed by the cleaning assembly, and the dirt collecting box is located below the dirt collecting frame and used for collecting the impurities scraped by the scraping plate. Therefore, the filter barrel can be quickly and effectively cleaned, the filter barrel cannot be blocked, and the technical problems that in the prior art, a filter screen is blocked due to long-term operation of a microfilter, and the filter screen is not easy to clean in the prior art are effectively solved.

The invention discloses a siraitia grosvenorii low-temperature continuous countercurrent extraction process and a siraitia grosvenorii extract, and belongs to the technical field of siraitia grosvenorii extraction.The siraitia grosvenorii low-temperature continuous countercurrent extraction process comprises the following steps that S1, fresh siraitia grosvenorii fruits are extracted through a four-stage squeezing and continuous countercurrent extraction combined method, s2, carrying out solid-liquid separation on the first liquid phase through ceramic membrane microfiltration, and collecting a microfiltrate; and S3, carrying out post-treatment on the micro-filtrate to obtain the extract. The siraitia grosvenorii low-temperature continuous countercurrent extraction process is high in extraction efficiency and low in solvent consumption, and the prepared extract has both high sweetness and oxidation resistance.

The invention discloses a preparation method of a raspberry-derived exosome loaded with neroli essential oil. The preparation method comprises the following steps: preparing raspberry fruits into homogenate; centrifuging, collecting supernate, adjusting the pH value to 4.07.5, standing, and centrifuging again; taking supernate, adjusting the pH value to 7.2-7.4, adding polyethylene glycol, standing, centrifuging, collecting precipitate, and carrying out resuspension dispersion; performing microfiltration to obtain supernate, and combining electrophoresis dialysis and ultrafiltration concentration to obtain the high-purity raspberry exosome. And diluting the exosome, adding the diluted exosome into a dimethyl sulfoxide solution containing neroli essential oil, carrying out water bath stirring, carrying out ultrafiltration centrifugation, and taking a clear liquid to obtain the exosome loaded with the neroli essential oil. Efficient separation and purification of the raspberry exosome are achieved by applying an isoelectric precipitation technology, then the neroli essential oil is wrapped in the exosome, the stability of the essential oil is improved, the action time is prolonged, meanwhile, the neroli essential oil and active ingredients of the exosome generate a synergistic effect, and the antioxidant activity is jointly enhanced.

The invention relates to the technical field of biological medicine, in particular to a lactobacillus-sourced extracellular vesicle and application of the lactobacillus-sourced extracellular vesicle in prevention and treatment of necrotizing enterocolitis, the extracellular vesicle is prepared from lactobacillus, the lactobacillus is Lactobacillus rhamnosus GG, the strain is purchased in the American Center for Type Culture Collection, and the preservation number is ATCC 53103. The preparation method of the extracellular vesicles comprises the following steps: carrying out ultracentrifugation on a lactobacillus culture solution, removing thalli, then collecting supernate, carrying out primary microfiltration, taking micro-filtrate, carrying out differential centrifugation, resuspending precipitates by using PBS, then carrying out secondary microfiltration, collecting the micro-filtrate, carrying out density gradient centrifugation, and collecting a 30-45% interface vesicle layer. The invention discloses a synergistic effect mode between intestinal symbiotic flora and intestinal epithelial cell metabolic molecules for the first time, and the discovery is expected to construct a brand-new mechanism normal form for regulating the host intestinal barrier function by flora.

The invention relates to the field of fish and vegetable comprehensive cultivation, in particular to a photovoltaic fish and vegetable symbiotic system which comprises a photovoltaic system, a fishery breeding system and a circulating purification system, a fishpond is arranged below a photovoltaic panel, net cages are arranged in the fishpond for fish breeding, the circulating purification system is arranged around the fishpond, and water is pumped in the fishpond through a pump station; water quality purification and water quality maintenance are carried out on the pumped water through a precipitation filtration system, a microfilter, a hydroponic vegetable system and an ultraviolet disinfection system in sequence, so that the water body in the pond is ensured to fully and circularly flow, and the concentration of chemical substances such as ammonia nitrogen, nitrite nitrogen and the like which are harmful to fishes is reduced. Through the synergistic effect of all parts of the photovoltaic fish and vegetable symbiotic system, the problem that the water quality in the aquaculture environment under the photovoltaic panel is prone to deterioration is effectively solved, and the aquaculture benefits are improved.

The invention provides a method for separating beta-casein from a dairy product, a method for separating kappa-casein and a casein mixture. The method for separating the beta-casein from the dairy product comprises the following steps: separating whey and casein in skimmed milk to obtain a casein concentrated solution; carrying out low-temperature microfiltration-percolation treatment on the casein concentrated solution at the temperature of 10 DEG C or below to obtain beta-casein permeate and a by-product of which at least part of beta-casein is removed; and heating the beta-casein permeate to realize self-association of the beta-casein permeate, and then carrying out ultrafiltration-percolation to obtain the beta-casein. The influence on the structure and performance of the beta-casein in the separation process is reduced, and the purity of the separated beta-casein product is improved.

The invention discloses a method for preparing low-bitterness micromolecular bovine colostrum protein peptide powder by adopting a multi-stage membrane separation and enzyme membrane coupling combined technology, and belongs to the technical field of food processing. The preparation method comprises the following steps: firstly, dividing a colostrum component into components to be hydrolyzed by adopting a multi-stage membrane separation technology, namely casein intercepted by ceramic membrane microfiltration and lactoglobulin and lactalbumin filtered by an ultrafiltration membrane, and non-hydrolytic components, namely immune globulin and lactoferrin; the preparation method comprises the following steps: firstly, separating bovine coloctrum, then deeply hydrolyzing the separated lactoglobulin, milky white and casein flocculate with the molecular weight of less than 50kDa by adopting an enzyme membrane coupling technology, mixing with unhydrolyzed immunoglobulin and lactoferrin, and freeze-drying, so that the peptide content in the treated bovine coloctrum is more than 40%, the peptide content of 200-1000Da is more than 30%, the peptide content of 200-1000Da is more than 30%, and the peptide content of 200-1000Da is more than 30%. The preparation method is simple, the preparation dispersion time is within 10 s, no obvious bitter taste exists, the retention rate of immune globulin in bovine coloctrum reaches 90% or above, and the preparation method is suitable for large-scale industrial popularization.

The technical scheme of the utility model discloses a land-based canvas pool litopenaeus vannamei recirculating aquaculture system which comprises an aquaculture pool, and the edge of the bottom of the aquaculture pool inclines towards the center so as to enable aquaculture water and impurities to converge towards the center to a fish closestool. The settling pond is connected with an outlet of the fish closestool through a drainage pipe, and the fluidized bed is connected with the settling pond through a water guide pipe arranged at the water outlet channel; and the microfiltration part is connected with the fluidized bed and the culture pond through a water conduit and a water return pipe respectively. The bottom of the culture pond is inclined, water is drained from the center of the culture pond and enters the culture pond tangentially, so that vortexes are formed in the culture pond, and residual feed, excrement and the like are quickly concentrated towards the water outlet in the center of the bottom of the culture pond under the action of tangential force of water flow. Through a plurality of water inlet pipes and water outlet pipes, the effect of water quality circulation of the culture pond, the sedimentation pond, the fluidized bed biological filter and the rotary drum type micro-filter is achieved, and the problems that suspended solids and ammonia nitrogen are prone to being generated in a traditional prawn culture technology and the nitrite concentration is continuously increased are solved.

The invention relates to the technical field of fermentation industrial wastewater treatment, and particularly discloses a white spirit production wastewater treatment process and system. The system comprises a pretreatment unit, an anaerobic treatment unit, a denitrification unit, a multi-stage biochemical treatment unit, an advanced treatment unit, a sludge treatment unit and a backwashing water recovery unit which are connected through a corrosion-resistant pipeline, a variable frequency pump body and a control valve group. The method comprises the following steps: homogenizing water quality and water quantity through an adjusting tank, adjusting the pH value through a neutralizing tank, pretreating through a microfilter and an air flotation device, sequentially feeding into a hydrolysis acidification tank and a two-stage UASB reactor to degrade organic matters, reducing nitrogen concentration through a denitrification unit, deeply degrading pollutants through a multi-stage biochemical system, and finally realizing up-to-standard discharge through magnetic coagulation phosphorus removal and decoloration treatment. The sludge is subjected to resource utilization after being concentrated and dehydrated, and backwashing water and filtrate are recycled and retreated. The system is high in treatment efficiency, low in operation cost, high in resource recovery rate, stable in effluent and suitable for wastewater treatment of various white spirit production enterprises.

Provided is a method for large-scale preparation of a purified preparation of a recombinant lentiviral vector at the GMP grade. The method comprises: (a) providing raw material feed liquid to be purified that comprises recombinant viral vectors; (b) carrying out a microfiltration treatment on the feed liquid to obtain a microfiltered filtrate comprising the recombinant viral vectors; (c) optionally concentrating the filtrate to obtain a concentrated filtrate; (d) purifying the filtrate obtained in the previous step by means of chromatography to obtain a crude pure product comprising the recombinant viral vectors; and (e) subjecting the crude pure product obtained in the previous step to liquid exchange and elaborate purification to obtain the purified recombinant viral vectors.

The invention discloses a nicotinic acid immobilized enzyme conversion method, which comprises the following steps: taking wet thalli containing nitrilase, preparing a flocculation clear liquid, passing the flocculation clear liquid through an ultrafiltration membrane, carrying out embedding immobilization to obtain embedded particles not greater than 2mM, and after the embedded particles are hardened, separating and purifying the obtained conversion liquid by adopting a membrane separation method to obtain the nicotinic acid immobilized enzyme. Sequentially carrying out microfiltration, activated carbon decoloration, ultrafiltration, nanofiltration decoloration, acidification crystallization and centrifugation to finally obtain a nicotinic acid finished product. The immobilized enzyme prepared by the method disclosed by the invention can stably exist in nitrile substances, can be repeatedly used for many times, and is high in stability and low in enzyme activity loss rate, and a separated and purified product is free of impurities and high in yield.

The invention relates to the technical field of precipitation and sludge dewatering, in particular to a land-saving integrated treatment method for deep purification and sludge dewatering. When low-valence ions are removed as a treatment target, the device comprises a pretreatment unit, a biological enhancement precipitation and dehydration integrated tank, a filter tank, a microfiltration or ultrafiltration unit, a nanofiltration or reverse osmosis unit, a clean water tank, a drainage tank, a concentration tank, a pump room and related auxiliary pipelines, when low-valence ions and frequently-appearing organic pollutants are removed as a treatment target, the device comprises a pretreatment unit, a biological enhancement precipitation and dehydration integrated tank, an ozone contact tank, an activated carbon adsorption tank, a filter tank, a microfiltration or ultrafiltration unit, a nanofiltration or reverse osmosis unit, a clean water tank, a drainage tank, a concentration tank, a pump room and related auxiliary pipelines. The deep purification sludge dewatering land-saving integrated treatment method can integrate the processes of efficient precipitation, sludge dewatering, biological enhancement and land-saving integration, so as to realize deep purification of water quality and cyclic utilization of resources.

The invention discloses a reaction kettle parameter self-adaptive adjusting method based on a physical and biological double-cutting one-step method. The method comprises the following steps: in a physical cutting and biological enzymolysis synergistic reaction stage, establishing a reaction kettle parameter dynamic optimization model, and carrying out synergistic tuning on a first reaction parameter of a reaction kettle according to the reaction kettle parameter dynamic optimization model; in the first ultrafiltration separation stage, a pressure difference PH coupling control algorithm is constructed and used for adjusting a second reaction parameter of the reaction kettle in real time; in a second ultrafiltration refining stage, dynamically adjusting a third reaction parameter according to a preset multi-objective optimization model; in the microfiltration purification stage, a fourth reaction parameter is adjusted according to the product particle size distribution corresponding to the reaction kettle; in the nanofiltration concentration stage, a fifth reaction parameter is cooperatively adjusted based on an ionic strength feedback mechanism; obtaining the power efficiency, the membrane flux attenuation rate and the product yield index of the reaction kettle, and completing the self-adaptive adjustment of the parameters of the reaction kettle.

The utility model discloses a wine brewing wastewater treatment system. The wine brewing wastewater treatment system is composed of a grating filtering device, a microfiltration filtering device, an adjusting tank, an advanced air flotation device, a reaction tank, a primary sedimentation tank, an MCR tank, an advanced anaerobic reactor, a first-stage A tank, a first-stage O tank, a second-stage A tank, a second-stage O tank, an MBR tank, a catalytic electrolysis denitrification device, a coagulating sedimentation device and a precision filtering device. The brewing wastewater is filtered by a grating to separate larger particles in the brewing wastewater from the wastewater, the wastewater enters a regulating tank after passing through a microfiltration and separation device, then enters a reaction tank for dosing reaction after removing solid particles in the wastewater by an advanced air flotation device, and is precipitated by a primary precipitation tank, and the effluent enters an MCR tank to further remove macromolecular pollutants in the wastewater. The effluent enters an advanced anaerobic reactor for anaerobic biochemical treatment, the effluent enters an MBR device after being subjected to secondary AO treatment, the effluent is treated by the MBR device, and the effluent is discharged after reaching the standard after being subjected to catalytic electrolysis and coagulating sedimentation.

The invention relates to the technical field of food, in particular to a preparation method of low-sensitization hydrolyzed whey protein nanoscale microcapsule powder, which comprises the following steps: S1, preparing a whey protein solution, performing microfiltration, and treating with cysteine hydrochloride; s2, trypsin hydrolysis; s3, inactivating and cooling; s4, adding chymotrypsin, and synchronously applying ultrasonic waves; s5, bromelain is added, ultrafiltration is performed, and peptide fragments are collected; s6, preparing a capsule wall solution; s7, adopting a micro-fluidic chip to form a nano emulsion; s8, the mixture is added into a CaCl2 solution to be stirred, multi-layer self-assembly is conducted, and micro-capsule particles are obtained; and S9, carrying out ultrahigh-pressure micro-jet homogenization, vacuum freeze drying and low-temperature plasma assisted grinding on the micro-capsule particles to obtain the nano-scale micro-capsule powder. The stability of active ingredients is maintained through multi-enzyme cooperation and ultrasonic-assisted efficient elimination of allergens, multi-layer nano-embedding under microfluidic control and low-temperature plasma grinding, and the limitations of low single enzymolysis efficiency, insufficient embedding rate and thermal denaturation risk in the prior art are overcome.

The invention discloses a method for extracting, separating and purifying plant active ingredients, and belongs to the technical field of plant extraction.The method comprises the following steps that an MOF-enzyme nanocomposite is prepared, specifically, ZIF-8 nanoparticles are dispersed in an enzyme solution, dopamine-polyethylene glycol is added for a cross-linking reaction, and the MOF-enzyme nanocomposite is obtained through ultrafiltration and centrifugation; carrying out enzymolysis treatment, namely mixing the pretreated plant material with the complex, and carrying out enzymolysis; extracting: after enzymolysis, adjusting the pH value of the system to be neutral; and separation and purification: carrying out plate frame filtration and microfiltration to remove impurities, carrying out macroporous adsorption resin column chromatography, carrying out ethanol gradient elution, and carrying out concentration, crystallization and vacuum drying to obtain the target active component. According to the method, the enzymolysis efficiency and the component stability can be synchronously improved, and the enzyme utilization rate is improved, so that the technical problems that in traditional free enzyme extraction, the contact efficiency of enzyme and plant cell walls is low, and the enzyme is easily influenced by pH and temperature to be inactivated are effectively solved.

The application discloses a kind of intelligent switching water sample pretreatment system and method, system includes: combined sand filter sample barrel, for collecting water sample to be pretreated, initial water sample turbidity value acquisition is carried out, while water sample preliminary pre-filtering treatment is carried out;Positioning floating sampling device, for fixing to take supernatant after water sample settlement;Microfiltration module, for the microfiltration of ultrahigh turbidity water sample;Sample water transfer pump, for transmitting supernatant in combined sand filter sample barrel to microfiltration module;Sample collection barrel, for collecting and detecting water sample quantity after processing, for instrument or laboratory personnel to sample analysis;Valve assembly, by valve opening and closing, water sample is switched different pretreatment mode;Cleaning assembly, including rotary high-pressure spray head and self-heating ultrasonic cleaning device, for cleaning system after pretreatment internal residual adherend.

The invention discloses a method for extracting nutrient substances from sea cucumber processing wastewater and application, and belongs to the technical field of sea cucumber processing wastewater extraction. According to the method, the sea cucumber processing wastewater is used as a raw material, nutrient substances in the wastewater are extracted, the processing wastewater is pretreated by adopting an air floatation-microfiltration coupling technology, suspended solids and grease in the wastewater can be effectively removed, and heat-sensitive substances are reserved; meanwhile, a pH response type flocculating agent is adopted for removing heavy metal in a high-selectivity mode, meanwhile, loss of nutrient substances including protein, polysaccharide and saponin is avoided, after pretreatment is completed, a staged enzymolysis technology, a membrane separation-adsorption combined technology, a vacuum thin film evaporation technology and a programmed cooling crystallization technology are cooperated, protein, polysaccharide and saponin can be effectively separated and extracted, and the quality of the product is improved. The recovery rate, the purity and the product performance of each nutrient substance are remarkably improved, and technical support is provided for reutilization of nutrient components in sea cucumber processing wastewater.

The invention discloses a production process of earthworm protein powder, and aims to solve the problems of poor product quality and activity loss caused by no standard raw materials, non-standard hydrolysis parameters, more separated and filtered impurities, improper drying control and no storage control in the existing process. The process comprises the following steps: selecting fresh red frozen eisenia fetida; adding 2-3 times of reverse osmosis purified water, homogenizing and crushing for more than or equal to 1 hour until the yogurt is formed, and self-melting at 37 DEG C for more than or equal to 10 hours; taking supernate and using a tubular separator (controlling the flow rate and cleaning a rotary drum every 30 minutes); 2-3 times of purified water is added into the centrifugate, a membrane is washed regularly through microfiltration, the temperature is controlled through ultrafiltration, and residues are washed away through the purified water after alkali washing; drying at the temperature less than or equal to 50 DEG C (pre-cooling at-22 DEG C, raising 5 DEG C every 3 hours, and recording the temperature regularly); and airing the powder, performing ultraviolet sterilization for more than or equal to 2 hours, screening by 80-120 meshes, packaging, and storing in a finished product warehouse with controlled temperature and humidity (5-25 DEG C, 40-60%) and sterilization for 1 hour every day. The process improves the protein extraction rate, purity and activity retention rate, ensures the product safety and stability, and is suitable for industrial production.

The invention relates to the field of fiber membrane preparation, in particular to a preparation and test method of a microfiltration composite fiber membrane, which comprises the following steps: preparing a PVA (Polyvinyl Alcohol) solution; accurately and respectively weighing CA and GO, and respectively adding the CA and the GO into the prepared PVA solution to obtain a PVA / CA / GO spinning solution; assembling SVF base cloth on an unwinding mechanism, coating the front end of the base cloth on the surface of a metal mesh curtain above a solution tank, then pouring a spinning solution into the solution tank, and performing electrostatic spinning after adjusting spinning conditions to obtain a composite fiber membrane; the composite fiber membrane is subjected to hot pressing treatment, so that carboxyl on a cross-linking agent citric acid and hydroxyl of a PVA chain are subjected to an esterification reaction, water resistance is improved through structural regulation and control of a PVA polymer, and the microfiltration composite fiber membrane is obtained. According to the invention, the contact area of the cross-linking agent citric acid and PVA is greatly increased, so that the cross-linking effect is more sufficient, and the fiber membrane can maintain a good fiber form after working in water for a long time.

The utility model discloses a pressure tank type microfiltration system which comprises a waste residue collecting cover, a spraying cover, a pressure tank main body and a microfiltration cylinder, the microfiltration cylinder is arranged in the middle of the pressure tank main body, the spraying cover is arranged on the inner side wall of the pressure tank main body, and the waste residue collecting cover and a shunting blocking cover are arranged at the two ends of the pressure tank main body respectively. A plurality of supporting bases are arranged at the bottom of the pressure tank body. The spraying cover is arranged on the inner side wall of the pressure tank main body, the plurality of spraying heads are arranged at the bottom of the spraying cover, and sewage can be continuously sprayed onto the micro-filtration cylinder through the plurality of spraying heads, so that sewage mixing can be avoided, secondary pollution can be reduced, and the filtering effect can be improved; a flow guide hole pipe is arranged in the middle of the microfiltration cylinder, a scraping plate is arranged on the outer side of the flow guide hole pipe, filtered water can be conveniently guided out through the flow guide hole pipe, a waste residue collecting cover is arranged at the end of the spraying cover, and a waste residue collecting opening is formed in the inner side of the waste residue collecting cover.

The invention relates to a method and device for purifying industrial and natural water of iron and manganese by oxidation of the contaminants with ozone, followed by filtration. The method includes treating water with ozone by combining the water with ozone in an ejector. The water and ozone are then mixed in a static mixer. The water is then sent to a settling tank for the sedimentation of sludge. From the settling tank, the water is sent for filtration using at least one disc filter with a filter rating of not less than 20 μm. The water is then subjected to tangential microfiltration using a cross-flow method. The result is that of allowing the effective non-chemical purification of water, while minimizing the costs of the purification process and equipment maintenance.

Iodized micellar casein is produced by adding, to an aqueous solution of micellar casein, crystalline potassium iodide at a ratio of 1:7-1:9; holding the mixture for 5-10 minutes; adding to the mixture crystalline potassium persulphate at a ratio of 1:8-1:12 crystalline potassium persulphate to micellar casein mass; holding the mixture for 4-8 hours at a temperature of 18-25°С and a pH of 6.5-8.9 while constantly monitoring the molecular iodine content of the solution and periodically adding portions of crystalline potassium persulphate at a ratio of 1:12-1:24 crystalline potassium persulphate to micellar casein mass to continue the iodination reaction; removing residual inorganic salts from the resulting aqueous solution by microfiltration and diafiltration, followed by sterilizing microfiltration and freeze drying or spray drying. The method makes it possible to produce iodized micellar casein that is suitable for creating products for preventing iodine deficiency and optimizing iodine metabolism and for preventing and protecting against radiation poisoning.

The application discloses a process method for zero discharge of ethylene alkali residue wastewater, which comprises a wet oxidation section, a biochemical section and a salt treatment section; the wet oxidation section comprises a heat exchange unit, a wet oxidation reactor, a cooler and an adjusting tank; the biochemical section comprises an electrodialysis I, aerobic biochemical treatment, ozone catalytic oxidation, anaerobic biochemical treatment, secondary biochemical treatment, a recycled water pool and a methane purification unit; the salt treatment section comprises a tubular microfiltration, an electrodialysis II, a decarbonizer, a salt separation system, a biological reactor and a reverse osmosis; wherein the modified anion exchange membrane used in the electrodialysis has the characteristics of strong anti-pollution ability and high ion exchange rate, can effectively realize the separation of salt and organic matters in the wet oxidation effluent of the ethylene alkali residue, solves the problem of difficult treatment of the organic matters in the wet oxidation effluent of the ethylene alkali residue, and finally realizes zero discharge.

The invention belongs to the technical field of wastewater treatment, and discloses an efficient evaporative crystallization treatment process for zinc-containing wastewater, which comprises the following steps: 1) adding a hydrogen peroxide solution into the zinc-containing wastewater, and applying ultrasonic waves to carry out ultrasonic enhanced oxidation; 2) stopping ultrasonic treatment, introducing sulfate radicals into the zinc-containing wastewater, adjusting the pH value, precipitating, separating the precipitate, adding a chelating agent and an anti-scaling agent into the zinc-containing wastewater, stirring for reaction, separating the precipitate, and then performing microfiltration to obtain pretreated zinc-containing wastewater; 3) feeding the pretreated zinc-containing wastewater into a multi-stage flash evaporation system to obtain a zinc-containing concentrated solution; 4, the zinc-containing concentrated solution is fed into a crystallizer, microbubbles are introduced, meanwhile, ultrasonic waves are applied to enhance gas-liquid interface disturbance to promote crystallization, crystals are separated from crystallization liquid and then dried, and the zinc salt is obtained.The technology achieves the multiple purposes of low scaling rate, low energy consumption, high recovery rate and high zinc salt purity, and has excellent industrial implementability and popularization value.

The invention discloses a system and a method for extracting and filtering sweet-scented osmanthus liquid for sweet-scented osmanthus tea, and relates to the technical field of biological extraction. Comprising a stock solution tank, a filtering device and a storage tank which are sequentially communicated, and the filtering device is connected with an external nitrogen supply device and internally provided with a pre-separation unit, a microfiltration unit and an oil-water separation unit. In the pre-separation unit, a spiral feeding cavity is connected with a rotational flow cavity through a tangential channel, a screw rod and the rotational flow cavity form an annular rotational flow chamber, and an ultrasonic generator, a slag collecting chamber and a spiral slag discharging device are arranged; the microfiltration unit comprises a microfiltration cavity, and the stock solution in the rotational flow cavity is led to the bottom of the microfiltration cavity through a liquid distribution pipe and is filtered to a liquid collection chamber through a ceramic membrane pipe; a liquid inlet pipe of the oil-water separation unit is connected with a liquid collection chamber, and an upper component liquid outlet and a lower clear liquid outlet of an oil-water separation cavity are respectively connected with a storage tank to realize extraction and filtration of sweet-scented osmanthus component liquid. According to the invention, high-efficiency solid-liquid pre-separation, microfiltration and oil-water separation integrated purification of the sweet-scented osmanthus liquid and sesame oil recovery can be realized under nitrogen-sealed positive pressure conditions, membrane pollution is reduced, and aroma activity is maintained.

The invention belongs to the technical field of electrolyte materials, and discloses a high-purity lithium bis (fluorosulfonyl) imide solution as well as a preparation method and application thereof. The preparation method of the high-purity lithium bis (fluorosulfonyl) imide solution comprises the following steps: 1) mixing inert chloralkane and lithium carbonate to form a suspension, dropwise adding bis (fluorosulfonyl) imide into the suspension at reaction temperature and pressure for reaction, after the reaction is finished, performing filter pressing, washing, and performing filter pressing again to obtain a filter cake; and 2) crushing the filter cake, feeding the crushed filter cake into a closed-loop circulating fluidized bed, sequentially drying in a low-temperature area and a medium-temperature area, instantaneously contacting and dissolving the obtained hot powder with an atomized and sprayed carbonate solvent to form a solution, and performing microfiltration to obtain the high-purity lithium bis (fluorosulfonyl) imide solution. The lithium bis (fluorosulfonyl) imide solution has ultra-high purity and ultra-low moisture, the content of other impurities such as chloride ions, free acids and metal ions is extremely low, additional steps of dehydration, purification or acidity adjustment and the like are not needed, and the lithium bis (fluorosulfonyl) imide solution can be directly used for preparing a high-performance lithium ion battery electrolyte.