51 results about "Double membrane" patented technology

The invention relates to the technical field of wastewater treatment, and discloses a double-membrane reclaimed water recycling device and a recycling method.The double-membrane reclaimed water recycling device comprises a support and an ultrafiltration membrane tank arranged in the support, a reverse osmosis membrane tank is fixed in the support, a settling tank is fixed in the support, a water storage tank is fixed in the support, and the double-membrane reclaimed water recycling device further comprises a tubular ultrafiltration membrane, a water storage tank and a water storage tank, the ultrafiltration membrane tank is fixed in the ultrafiltration membrane tank; the tubular reverse osmosis membrane is fixed in the reverse osmosis membrane tank; the wastewater is efficiently treated; when to-be-treated water is in a normal working state, the cleaning float bowl is driven by water pressure to move up and down in the tubular ultrafiltration membrane and the tubular reverse osmosis membrane: on one hand, intercepted substances attached to the wall surfaces of internal channels of the tubular ultrafiltration membrane and the tubular reverse osmosis membrane are scraped by a first cleaning scraping ring, a second cleaning scraping ring and a spiral scraping ring; on the other hand, intercepted objects attached to the scraping rings are washed and cleaned by means of water flow pressure, the intercepted objects are discharged through the spiral drainage channel, and therefore self-cleaning of the cleaning buoy is achieved.

The invention relates to the field of direct drinking water of a fusion calculation model, and discloses a double-membrane mixing direct drinking water system and an operation method.The method comprises the steps that online data of a water supply end and a water quality monitoring end are collected for cleaning and time alignment, and a basic working condition data set is formed; the method comprises the following steps: establishing an operation characteristic model comprising water demand prediction, raw water quality prediction and membrane flux characteristic sub-models, calculating double-membrane target water yield and water quality indexes based on the model to generate a control parameter set, evaluating membrane pollution to generate an online cleaning task queue, performing joint simulation to generate a pressure stability control instruction set, and dynamically correcting the model. The conversion from passive response to active pre-judgment of the double-membrane mixing direct drinking water system is realized, and the operation stability, the water quality guarantee capability and the water-saving and energy-saving effects are improved.

The invention provides an exosome from rice as well as a preparation method and application thereof. The exosome has a double-layer membrane spherical structure, and the particle size range is 20-1000nm. The exosome is obtained from rice calluses, and has the characteristics of high biological safety, high stability and sustainable mass production. And tests prove that the exosome has the functions of resisting aging, promoting cell regeneration and tissue repair, protecting and the like, and also can remarkably improve the cell absorption efficiency and the delivery efficiency of active ingredients such as peptide cells.

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 application discloses a preparation method of a PPSU-based ZIF-8 double-layer membrane and application of the double-layer membrane in hydrogen separation, and belongs to the technical field of gas separation membranes. The preparation method is as follows: ZIF-8 seeds are embedded in a PPSU matrix solution, then are spin-coated onto the surface of an alpha-Al2O3 carrier to obtain a PPSU-based membrane, and secondary growth of the membrane is carried out through a solvothermal reaction, so that the seeds grow epitaxially, a continuous, dense and defect-free ZIF-8 separation layer is formed on the surface and the near-surface region of the carrier substrate, and the reaction is ended to obtain the double-layer membrane. Through the seed embedding strategy, the interface bonding force between the ZIF-8 layer and the PPSU substrate is significantly enhanced, and the generation of interface defects is effectively inhibited. The double-layer membrane has high permeation flux and high separation selectivity for a H2 / CO2 system, and is particularly suitable for hydrogen separation and purification processes.

The invention provides an integrated bioreactor device for high-salt pharmaceutical wastewater and an application method of the integrated bioreactor device. The integrated bioreactor device is high in pertinence, good in practicability, high in applicability and high in automation; operation modes can be flexibly switched in the integrated central control system according to changes of water inlet conditions, the most effective operation process is started, and the efficient biochemical degradation function is achieved; according to the invention, a reactor system adapted to a high-salt environment and salt-tolerant microorganisms is arranged, and the operating environment can be adjusted according to the characteristics of treated wastewater and the biological characteristics of the used salt-tolerant strains, so that the purpose of efficient and stable operation is achieved; according to the invention, a biological membrane-membrane biological method double-membrane system is integrated, functional flora is highly enriched, and the treatment efficiency and impact resistance of a biochemical system are greatly improved.

A double membrane pump having a casing and a piston rod movably received in the casing, the casing having at least one inlet opening and at least one outlet opening, and a first membrane is arranged at one end of the piston rod and a second membrane is arranged at the other end of the piston rod. The first membrane is arranged in a first chamber of the double membrane pump and the second membrane is arranged in a second chamber. The membranes are designed to separate the chambers into a product chamber and an expansion chamber respectively. The pump has a drive device for bringing about a translational movement of the piston rod. The double membrane pump has a piston rod which is designed to perform a self-regulated, oscillating movement and thus enables simplified control of the membranes.

The application relates to a PVDF / rGO / Fe(II) composite film as an electro-Fenton cathode, a preparation method, application and membrane filtration reactor. The preparation method comprises the following steps: firstly, preparing a PVDF film by adopting a phase inversion method, covering reduced graphene oxide on the surface of the PVDF film by a suction filtration method to obtain a PVDF / rGO double-layer film; then, dispersing siderite powder in an organic solvent, adding a pore former and PVDF, and stirring and heating to prepare a uniform casting solution; finally, coating the casting solution on the surface of the PVDF / rGO double-layer film to obtain the PVDF / rGO / Fe(II) composite film; the composite film is applied to an organic pollutant and bacteria filtration system or a membrane biological reactor as an electro-Fenton cathode, has excellent anti-pollution effect and bacteria killing capacity, can significantly inhibit the formation of biofilm on the membrane surface, and has a wide application prospect in the aspect of anti-membrane pollution.

The application relates to the technical field of biomedical materials, and discloses a micro-nano fiber composite biomembrane based on electrospinning technology and a preparation method thereof, which comprises the following steps: preparing polycaprolactone, chloroform and dimethyl sulfoxide; mixing the chloroform and the dimethyl sulfoxide to prepare a solvent; dissolving a polymer solution of the polycaprolactone in the solvent and uniformly stirring; continuously collecting fibers by a roller at an ambient temperature of 10 DEG C-25 DEG C and a continuous humidity of 20%RH-70%RH, and performing electrospinning; continuously and gradually changing the fiber membrane structure from order to disorder and from smoothness to porosity in one step by regulating the ambient humidity and the roller rotating speed; and completing the electrospinning to prepare the micro-nano fiber composite biomembrane based on the electrospinning technology. The ambient humidity and the roller rotating speed are regulated to continuously and gradually change the fiber membrane structure from order to disorder and from smoothness to porosity in one step, the interface weak area of a traditional double-layer membrane is avoided, and the mechanical barrier and the biological activity are combined.

The present application provides a liposome having a double-layer membrane structure and use thereof. The liposome comprises a double-layer lipid membrane formed from (a) a phospholipid, (b) dipotassium glycyrrhizinate or a cationic surfactant, and (c) a polyoxyethylene sterol ether having a hydrophobic end embedded in the double-layer lipid membrane. The liposome of the present application has excellent stability and can be stably present in a formulation form. Furthermore, a liposome having a double-layer lipid membrane structure with excellent stability can be obtained without using a polyol.

The invention discloses a double-layer GBR membrane for promoting soft and hard tissue repair and a preparation method and application thereof, and is applied to the field of medical materials. The double-layer GBR membrane mainly comprises an acellular dermal matrix obtained by decellularizing fetal calfskin and a piezoelectric layer prepared by electrostatic spinning of poly-L-lactic acid and chitosan, and the acellular dermal matrix and the piezoelectric layer are further combined through a polydopamine coating prepared on the surface of the piezoelectric layer. During application, the acellular dermal matrix side faces the soft tissue side, and the piezoelectric layer faces the bone tissue side, so that the acellular dermal matrix skin side which is compact in structure is in contact with the soft tissue to play a barrier role, and the relatively loose piezoelectric layer is in contact with bone defects to play a role in guiding osteoblasts to adhere; functionally, soft tissue repair is promoted through the angiogenesis promoting effect of the acellular dermal matrix and the similarity of the tissue of the acellular dermal matrix, and bone regeneration of a bone defect area is promoted through the piezoelectric osteogenesis and angiogenesis effects of the piezoelectric layer.

The utility model relates to the technical field of greenhouse heat preservation, and particularly discloses a greenhouse heat preservation structure which comprises an inner framework, the inner framework is composed of a plurality of n-shaped rods arranged in parallel, the n-shaped rods of the inner framework are fixedly connected into a whole through the same reinforcing rod, the outer surface of the inner framework is fixedly connected with an inner film, and the inner film is fixedly connected with the outer surface of the inner framework. The upper end of the inner framework is fixedly connected with a top framework, the top framework is of a plurality of arch structures arranged in parallel, the outer surface of the top framework is fixedly connected with a top film, and the inner framework, the top framework, the inner film and the top film form a greenhouse unit. According to the greenhouse heat preservation structure, the inner film and the outer film are arranged to form a double-layer film structure, a double-layer structure is formed, the inner film and the outer film can effectively block heat loss, heat exchange between the interior and the exterior of the greenhouse is reduced, and compared with a traditional greenhouse covered with a single-layer film, the greenhouse heat preservation structure can better maintain the temperature in the greenhouse.

The invention relates to the technical field of medicines, in particular to an extraction method and application of cordate houttuynia exosome-like nanoparticles. The method comprises the steps of pretreatment, impurity removal through differential centrifugation, fine filtration, ultra-speed centrifugation crude extraction, sucrose density gradient centrifugation purification, washing and the like. By optimizing key process parameters, the HELNs with the average particle size of 50-150nm and the typical double-layer membrane cup-shaped vesicle form can be stably obtained. Experiments prove that the HELNs prepared by the method have independent and direct anti-staphylococcus aureus activity. Based on the newly discovered biological activity, the invention provides new application of the HELNs in preparation of products (such as antibacterial drugs, dressings, coatings, lotions and the like) for inhibiting staphylococcus aureus and / or treating infection of staphylococcus aureus. The method is standard in operation and good in repeatability, and widens the application field of active ingredients of houttuynia cordata.

The application relates to the technical field of intelligent water treatment control, and discloses a system for simulating and predicting the kinetics of the adsorption capacity of biochar, which comprises the following modules: a data acquisition module uses the Arrhenius equation to introduce a temperature correction coefficient to perform thermodynamic compensation on adsorption kinetic constants; a flow state recognition module determines a forward adsorption or reverse desorption working condition based on the Langmuir model; a resistance decoupling module calculates the mass transfer Biot number based on the double membrane theory to distinguish the liquid film and the internal diffusion resistance of the particles, and uses a physical blockage index to distinguish physical blockage and chemical saturation; a hysteresis compensation module introduces a hysteresis correction factor to correct the desorption equilibrium concentration and calculate the recovery adsorption capacity during the reverse desorption; and a service life prediction module uses a dynamic utilization rate coefficient to correct the theoretical residual capacity and generate operation and maintenance instructions. Through the resistance decoupling and hysteresis compensation mechanisms, the physical and chemical attenuation mechanisms are effectively distinguished, and the precise prediction of the adsorption breakthrough time under dynamic working conditions is realized.

1. Name of the designed product: water purifier (double membrane). 2. Use of the designed product: water purifier for purifying water. 3. Design points of the designed product: in shape. 4. Picture or photo that best indicates the design points: perspective view 1.

The present disclosure relates to a method and system for sewage reuse, the method comprising the following steps: making the sewage to be treated sequentially enter a first catalytic oxidation unit, a first denitrification filter tank unit, a first carrier enhanced BAF unit, a manganese sand unit and a double membrane unit for treatment to obtain concentrated water and fresh water; making the concentrated water sequentially enter a high-density unit, a second catalytic oxidation unit, a second denitrification filter tank unit, a second carrier enhanced BAF unit and a sand filter unit for treatment; the second carrier enhanced BAF unit comprises a second carbon-based carrier, a second engineering bacteria and a second nutrient salt; the second nutrient salt comprises phenol. The method provided by the present disclosure can perform deep treatment on sewage for reuse, so as to improve the utilization rate of sewage.

The utility model relates to the technical field of water purification, in particular to a double-membrane water treatment system. According to the double-membrane water treatment system, a water inlet of an ultrafiltration assembly is communicated with a water outlet end of a raw water pipe, a water outlet of the ultrafiltration assembly is communicated with a water inlet end of an ultrafiltration water pipe, and a water outlet end of the ultrafiltration water pipe is communicated with a water inlet of an ultrafiltration water tank; the compressed air pipe is communicated with the water outlet end of the ultrafiltration assembly; the water inlet end of the backwashing pipe is communicated with the water outlet of the ultrafiltration water tank, the water outlet end of the backwashing pipe is communicated with the water outlet end of the ultrafiltration assembly, and a backwashing pump is arranged on the backwashing pipe; the backwashing drain pipe is communicated with a water inlet of the ultrafiltration assembly; the control device comprises a control valve and a controller, the control valve is in signal connection with the controller, and the controller is in signal connection with the backwashing pump.

The invention belongs to the technical field of sewage treatment, and particularly relates to an electrochemical-double-membrane treatment system and method for oily wastewater of a transformer substation. The electrochemical-double-membrane treatment system is composed of an electrochemical pretreatment unit and a double-membrane deep treatment unit which are connected in sequence. The electrochemical pretreatment unit consists of an electric flocculation module and an electrooxidation module which are connected in sequence; the double-membrane advanced treatment unit consists of an ultrafiltration module and a nanofiltration module which are connected in sequence. By optimizing parameters such as an electrode material, current density and medicament addition and combining with an iron ion valence regulation mechanism, efficient demulsification, oil-water separation and pollutant degradation are realized; the double-membrane unit further ensures the effluent quality, so that the petroleum pollutants and CODlt in the final effluent are not detected; 10 mg / L, and lt of ammonia nitrogen; the concentration is 3 mg / L, and the high-standard recycling and discharging requirements are met.

The application discloses a method for preparing pure water by a double membrane method, which comprises the following steps: Yangtze River raw water is introduced into a resin adsorption tower by a water inlet pump; the raw water has a conductivity of 234-395 muS / cm and a calcium ion of 11.9-14.2 mg / L; a carboxyl-modified phenolic resin is placed in the resin adsorption tower, and the carboxyl-modified phenolic resin accounts for 75-85% of the total volume of the resin adsorption tower; the residence time of the raw water in the resin adsorption tower is 27-41 min; the raw water treated above is introduced into a hollow fiber ultrafiltration membrane system, the pressure of the membrane is 0.1-0.3 MPa, the pure water flux is 2.1-3.4 t / h, and the working temperature of the membrane is 23-28 DEG C; the raw water treated by the ultrafiltration membrane is introduced into a two-stage reverse osmosis system, the water quality reaches the standard, and the prepared pure water is discharged into equipment requiring pure water by a water discharge pump. The pure water treatment method has the advantages of low production and operation cost, fully embodies the energy-saving and emission-reducing effect, and is an environment-friendly green production process.

The invention provides a bacterial outer membrane vesicle capable of efficiently targeting tumors and a preparation method of the bacterial outer membrane vesicle, and relates to the technical field of biological medicines. The target protein PDL1 binding peptide is successfully modified on the surface of the bacterial outer membrane vesicles to prepare the bacterial outer membrane vesicles PDL1-OMVs, the particle size range of the bacterial outer membrane vesicles PDL1-OMVs is 20-250 nm, and the bacterial outer membrane vesicles PDL1-OMVs have an obvious saucer-like double-layer membrane structure and accord with the structural characteristics of the bacterial outer membrane vesicles. According to the PDL1-OMVs provided by the invention, on one hand, the defect that the PD-L1 binding peptide is weak in targeting efficacy is improved, the targeting capability of the PD-L1 binding peptide is remarkably improved, on the other hand, targeting function transformation is realized on the bacterial outer membrane vesicles, and the PDL1-OMVs can realize a specific targeting effect on tumor cells, so that conditions are provided for the PDL1-OMVs serving as a carrier for targeted delivery of tumor drugs.

The invention discloses a double-framework, double-film and double-quilt heat preservation and heat storage sunlight greenhouse, and relates to the technical field of greenhouses, the double-framework, double-film and double-quilt heat preservation and heat storage sunlight greenhouse comprises a front supporting framework and a rear supporting framework which are connected with each other, supporting stand columns are arranged on the side, located in a planting area, of the rear supporting framework, and the supporting stand columns are arranged in the length direction of the rear supporting framework at intervals; one end of each supporting stand column is connected with the rear supporting framework, the other end of each supporting stand column is connected with the ground, a waterproof heat preservation quilt is arranged between every two adjacent supporting stand columns, and a temperature buffering space is formed among the supporting stand columns, the waterproof heat preservation quilts and the rear supporting framework. And a temperature buffer space is formed, so that the structural strength and stability of the rear side of the greenhouse are remarkably enhanced, wind pressure, snow pressure and soil pressure can be effectively resisted, indoor heat is prevented from being transmitted to the rear supporting framework, heat loss from the rear wall to the outside is reduced, and the night heat preservation capacity of the greenhouse is remarkably improved.

This invention discloses a biomimetic nanofluidic sensing membrane, its preparation method, and its applications. The biomimetic nanofluidic sensing membrane comprises a top supporting lipid bilayer membrane and a bottom anodic aluminum oxide membrane with a macroporous structure. A portion of the supporting lipid bilayer membrane corresponds to and communicates with some macropores in the anodic aluminum oxide membrane. An ion carrier is embedded in the supporting lipid bilayer membrane, and its surface is modified with cholesterol-modified aptamers and polyethylene glycol. This invention utilizes the lateral fluidity of the supporting lipid bilayer to achieve multivalent and efficient capture of aptamers. The natural antifouling properties of phospholipids and the steric hindrance of polyethylene glycol synergistically suppress non-specific adsorption, and the detection signal is amplified by the ion current rectification effect induced by the asymmetric structure. The detection limit for TNF-α is as low as 0.219 pM, and with machine learning, it can accurately distinguish six proteins. The preparation method is simple, and the detection sensitivity and specificity are high, showing broad application prospects in early disease diagnosis and high-throughput protein analysis.

The application provides a kind of high-efficiency tumor-targeting bacterial outer membrane vesicle and its preparation method, it is related to biological medicine technical field.The target protein PDL1 binding peptide is successfully modified on the surface of bacterial outer membrane vesicle to prepare bacterial outer membrane vesicle PDL1-OMVs, its particle size range is between 20-250nm, with obvious tea tray like double membrane structure, meet the structural characteristics of bacterial outer membrane vesicle.The PDL1-OMVs provided by the application improves the weak targeting efficiency of PD-L1 binding peptide on the one hand, significantly improves the targeting ability of PD-L1 binding peptide, on the other hand, realizes the targeted functional modification of bacterial outer membrane vesicle, and PDL1-OMVs can realize specific targeting effect on tumor cells, which provides conditions for it as a targeted delivery tumor drug carrier.

The invention discloses a mushroom cultivation method and a mushroom cultivation material in a high-altitude area, and belongs to the technical field of mushroom cultivation methods, and the mushroom cultivation method comprises temperature control, three-layer vertical light and temperature regulation and control, a dynamic ventilation system and an environment detection system for the cultivation material. The three-layer vertical light and temperature regulation and control device is composed of an upper layer, a middle layer and a lower layer. The dynamic ventilation system comprises a summer temperature difference utilization system and a winter double-film air interlayer structure, the CO2 increasing technology is matched, the outer layers of the double films are anti-aging PE films, and the inner layers of the double films are anti-fogdrop PO films. The three-layer vertical light and temperature regulation and control system realizes efficient utilization and accurate distribution of light energy and heat energy in high-altitude areas. The summer and autumn fruiting period depends on natural temperature difference and solar heat collection, and the cooling cost is reduced; and a zero-carbon heating system is constructed through the phase-change material and the solar hot-blast stove in the heat preservation period in winter.

A double membrane gasometer (1 ) comprises: a first flexible membrane (2) defining an enclosure internally delimiting a first variable volume (3) for a gas phase working fluid; a second flexible membrane (4) open and connected to the enclosure, wherein the second flexible membrane (4) and the enclosure delimit between them a second variable volume (5) for an auxiliary fluid. A mechanical connecting device (11) is placed at an outer perimeter of the enclosure and is configured to join the second flexible membrane (4) to the enclosure. A structure (15) is constrained to the mechanical connecting device (11) and is fixed to the ground (G). The mechanical connecting device (11) comprises: a first element (13) and a second element (14) surrounding the outer perimeter of the enclosure. The first element (13) and the second element (14) are joined together and clamp between them an appendage (12) of the first flexible membrane (2) and the perimeter edge (4a) of the second flexible membrane (4).

The utility model provides an intestinal anastomosis metal stent system with a suction function, which comprises a metal stent, an inner membrane, an outer membrane, a drainage tube and a stent release device, the metal stent is dumbbell-shaped, two sides of the metal stent are raised, and the middle of the metal stent is a groove section; the inner film is a double-layer film and comprises a first film and a second film which are attached to the inner side and the outer side of the metal stent, and the first film and the second film are attached to wrap the metal stent into a whole; the outer film wraps the metal support and wraps the outer side of the second film. The two ends of the outer film are fixedly attached to the outer side of the second film at the protruding positions of the two sides, a space is formed between the outer film and the second film, and a plurality of through holes are formed in the outer film. The drainage tube is communicated with the space; the metal support is in the support releasing device before being released. After the metal support is released, liquid secreted by an intestinal canal stoma, intestinal mucosa, blood vessels and stoma tissue can be blocked or supported, the liquid can enter a gap between the outer membrane and the inner membrane through the through holes in the outer membrane and is sucked out by negative pressure, the stoma and the stoma are kept clean, and healing of the stoma and the stoma is promoted.

The utility model discloses a biogas slurry fertilizer making device based on double-membrane coupling. The device comprises a preheating unit, a feeding side membrane contactor, an absorption side membrane contactor, a gas circulation pipeline, a negative pressure gas pump and a rear end crystallization fertilizer making system. Hydrophobic microporous membrane components are respectively arranged in the feeding side membrane contactor and the absorption side membrane contactor; the gas circulation pipeline is communicated with the gas cavities on the two sides to form a closed loop, and gas circulation is driven by the negative pressure gas pump. And the rear-end crystallization fertilizer preparation system is communicated with the acid liquid cavity of the absorption side membrane contactor and is used for preparing the extracted nutrients into a solid fertilizer. According to the utility model, the closed circulating air flow is used as an intermediate medium, so that the direct contact between the biogas slurry and the acid absorbent is thoroughly avoided, the efficient separation of high-concentration ammonia nitrogen in the biogas slurry and the conversion of high-added-value fertilizer are realized on the premise of not additionally adding chemicals to adjust the pH value, and the system has excellent thermodynamic energy efficiency and energy self-sufficiency characteristic.

The invention belongs to the technical field of pharmaceutical equipment, and relates to a parallel double-membrane-package multi-product shared ultrafiltration method and system, and the system comprises a flow path switching module, a feed liquid conveying monitoring module, a fluid parameter adjusting module, an ultrafiltration separation monitoring module and a waste liquid treatment module. The flow path switching module starts a corresponding control switch according to a produced product and switches the multi-channel valve to a target film package flow path; the feed liquid conveying monitoring module drives a liquid inlet pump to convey feed liquid to be treated and monitors pipeline pressure in the conveying stage in real time. The fluid parameter adjusting module detects flow and conductivity data of to-be-treated feed liquid and adjusts a proportional adjusting valve to stabilize operation parameters; the ultrafiltration separation monitoring module realizes ultrafiltration separation of the feed liquid to be treated through a target membrane package and monitors data in real time; the waste liquid treatment module turns off related equipment switches after ultrafiltration is completed, and guides waste liquid to a waste liquid opening to be discharged. According to the invention, the ultrafiltration processes of multiple biological products can be quickly switched without dismounting in a single system, the risk of manual operation is greatly reduced, and the overall production efficiency is improved.

This invention discloses a method for preparing a carbon nanomaterial-PVA dual-channel membrane. First, carbon nanomaterials are blended with PVA to form a coating solution. This solution is coated onto a glass plate and dried to form a flat membrane. The membrane is then cut into wide rectangular membranes and narrow rectangular strips. Two wide rectangular membranes are stacked together, and water is applied to bond one end. The narrow rectangular strips are then bonded to the middle of the double membrane, without contacting the bonded end. Finally, the long sides of the double membrane are bonded together to obtain the dual-channel membrane. The carbon nanomaterials used in this invention are single-layer graphene, graphene quantum dots, or carbon nanotubes, possessing two-dimensional water channels, resulting in high selectivity and salt rejection. Simultaneously, the dual-channel membrane features a large surface area, good mechanical properties, unobstructed flow channels, and good sealing performance, overcoming the shortcomings of existing tubular membranes such as small area, easy leakage, and low packing density. During diffusion dialysis, it eliminates the need for traditional flat-sheet membrane diffusion dialysis equipment such as septa, gaskets, meshes, and nuts.

This invention provides a method and apparatus for extracting heme iron based on a dual-membrane cascade and oxygen isolation protection, belonging to the field of biochemical separation and purification technology. The method first constructs a pneumatically suspended hemolytic environment, utilizing a metal sintered microporous distributor to generate a micron-sized inert bubble fluidized bed, achieving red blood cell disruption and deep deoxygenation under zero mechanical shear conditions, solving the molecular damage and oxidation problems caused by traditional processes. Then, a gas-liquid co-flow ultrafiltration mechanism is employed, introducing pulsed plug flow drive to physically peel off the protein gel layer on the membrane surface online, achieving dynamic anti-clogging and long-term stability in the macromolecular separation process. Finally, transmembrane partial pressure extraction is performed based on a reverse gas-scan nanofiltration model, distinguishing the migration paths of water molecules and dissolved oxygen, outputting a highly active concentrate and a closed-loop circulating gas flow. This invention effectively improves the extraction efficiency of the product Fe. 2+ Retention rate, purity, and continuity of industrial production.