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1742results about How to "Improve filtration efficiency" patented technology

Preparation method of layer-by-layer self-assembled hollow fiber forward osmosis membrane

The invention discloses a preparation method of a layer-by-layer self-assembled hollow fiber forward osmosis membrane. The preparation method comprises the steps of: preparing hollow fiber forward osmosis base film, modifying hollow fiber ultrafiltration base film, repeating layer-by-layer assembly of polycation and polyanion layers, performing interface cross-linking polymerization for preparinga selective functional layer, conducting moisturizing, and carrying out treatment and storage so as to prepare the layer-by-layer self-assembled hollow fiber forward osmosis membrane. The surface of the hollow fiber self-support base film which is prepared by using a phase conversion method is activated firstly, layer-by-layer assembly of polycation and polyanion is repeated on the surface of thefilm so as to form an functional polarization layer for an electrolyte solution, and the polyamide selective layer is prepared through interfacial chemical cross-linking polymerization. The prepared hollow fiber forward osmosis membrane has a controllable thickness and an internal polarization layer with a high charge capacity, and the internal concentration polarization phenomenon can be alleviated effectively during the forward osmosis process; therefore, the hollow fiber forward osmosis membrane can simultaneously obtain high flux and low reverse salt flux, has high filtration separation efficiency, easy cleaning and a long service life, and can be widely applied to seawater desalination and concentration and desalination of brine.
Owner:西安金藏膜环保科技有限公司

Electret master batch for melt-blown non-woven fabric for low-resistance mask and preparation method of electret master batch

The invention discloses electret master batch for melt-blown non-woven fabric for a low-resistance mask and a preparation method of the electret master batch. The electret master batch for the melt-blown non-woven fabric for the low-resistance mask is prepared from the following components in percentage by weight: 65-85% of polypropylene resin; 1-3% of electret powder; 5-15% of a dispersant; 3-10%of a nucleating agent; 3-10% of a softening agent; 0.05%-0.5% of a processing aid; wherein the softening agent is erucyl amide; the polypropylene resin is homo-polypropylene and/or co-polypropylene,and the melt index MFI of the polypropylene resin is 230 DEG C/2.16 kg and is not lower than 1000 g/10 min. According to the electret master batch, the softening agent, the nucleating agent and othercomponents are added, so that when the electret master batch and the ultra-high melt index polypropylene are mixed to be used for producing the melt-blown non-woven fabric for the mask, the obtained melt-blown non-woven fabric for the mask can have low respiratory resistance while having high filtering efficiency, and therefore the electret master batch is particularly suitable for being used as amask material. The formula does not greatly adjust the formula of the existing electret master batch, and is easy to implement.
Owner:KINGFA SCI & TECH CO LTD +1

High-efficiency intelligent aerobic fermentation reaction system and method

The invention discloses an aerobic fermentation reaction system and method. The high-efficiency intelligent aerobic fermentation reaction system comprises an aerobic fermentation reactor, a circular water system, a gas intake and exhaust system, a detection system and a control system, wherein a water jacket is arranged outside a horizontal roller of the aerobic fermentation reactor; a material feeding and discharging hole and a gas intake and exhaust hole are respectively formed in sealing covers at two sides of the horizontal roller; the circular water system is connected and communicated with the water jacket on the horizontal roller; the gas intake and exhaust system is connected and communicated with the gas intake and exhaust hole in the sealing cover of the horizontal roller; a sensor of the detection system is arranged in the aerobic fermentation reactor and on a water passing pipe of the aerobic fermentation reactor; a signal output by the sensor is respectively connected with the control system; and the control system is used for controlling the circular water system, the gas intake and exhaust system, the aerobic fermentation reactor and external feeding and discharging conveying equipment. According to the high-efficiency intelligent aerobic fermentation reaction system and method disclosed by the invention, the occupied area is smaller and the fermentation efficiency is higher; no secondary pollution occurs; and the reduction, harmlessness and resourceful treatment of organic wastes can be quickly realized.
Owner:HUNAN SAKAL ENVIRONMENTAL SCI & TECH CO LTD +1

Multifunctional high efficient organic material decomposition agent and preparation method thereof

The invention discloses a multifunctional high efficient organic material decomposition agent and a preparation method thereof. The decomposition agent of the invention comprises composite original strains consisting of bacillus amyloliquefaciens, Aspergillus oryzae, Trichoderma viride, and Saccharomyces cerevisiae and an organic material carrier, and an inorganic carrier. Strains of the decomposition agent can be mutualistic, and have complementary advantages. The adaptation is wide, and a plurality of organic matter clastic enzymes can be produced by metabolism. The decomposition agent has high activity and can be used for fermentation and conversion of a plurality of organic materials such as livestock and poultry excrements, crop straws, city sludge, food waste, food processing and pharmaceutical waste residues, and has fast fermentation start, fast deodorization, low temperature resistance, and low moisture resistance. The fermentation period is shorter by 5-7 days than that in the same technology. Fermented and converted organic fertilizers have the obvious rhizosphere ecological regulation and control function, promote the root growth, and improve the root vitality. A plurality of soil borne diseases are prevented by improving the flora diversity, hyperparasitism and biological antagonism.
Owner:HEBEI ACADEMY OF AGRI & FORESTRY SCI INST OF GENETICS & PHYSIOLOGY

Multilayer electret nano-fiber filtering material and preparation method thereof

ActiveCN107441827AIncrease spinning speedSolve problems such as easy blockageSynthetic fibresElectro-spinningFiberSpinning
The invention relates to a multilayer electret nanofiber filtering material and a preparation method thereof. The invention adopted the technical scheme is as follows: through an electric-field stepped increasing/reducing technology, utilizing a combined needle head for electrostatic spinning to realize deposition of spinning polymer solution on a receiving substrate to obtain nanofiber, carrying out slight dissolving treatment on the surface of a nanofiber layer by a certain release rate by adopting a recovery solvent steam, wherein the nanofiber layer is uniformly filled with electret materials and the diameter of the nanofiber layer is distributed in a stepped-increasing or stepped-reducing manner along the direction vertical to the breadth. According to the multilayer electret nano-fiber filtering material, the electret charge stability is extremely high, the surface electrostatic potential is 250-7000V, simultaneously the filtering performance is excellent, the filtering efficiency for 0.03-10 microns particulates is more than 99.997%, the resistance pressure drop is less than or equal to 39Pa, the service life is long, and the development and application prospect in the aspect of filtering materials for air purifiers, window gauzes, masks and filtering papers and the like are wide.
Owner:DONGHUA UNIV

Production method of high-salt diluted and low-temperature fragrant soy sauce

The invention discloses a production method of a high-salt diluted and low-temperature fragrant soy sauce, which comprises the following steps of: (1) curing raw materials including wheat and defatted soybeans, and then uniformly mixing the wheat and the defatted soybeans; (2) inoculating aspergillus oryzae strains to the obtained raw material mixture so as to obtain a yeast; (3) cultivating the yeast for 44-48 hours at a temperature of 25-30 DEG C so as to obtain a mature yeast; (4) adding 2.0-2.5 weight times of saline water into the mature yeast so as to obtain a raw soy sauce mash; (5) moving the raw soy sauce mash to the inside of an airtight fermentation tank for fermenting: firstly fermenting for 23-27 days at a temperature of 13-17 DEG C, then continuing to ferment at a temperature of 28-32 DEG C, and on the 28-32nd days, adding mixed fermentation strains into the fermentation tank and continuing to ferment; in the process of fermentation, stirring by using a compressed air flow; and fermenting for more than six months so as to obtain a mature soy sauce mash; and (6) squeezing and filtering the mature soy sauce mash so as to obtain the low-temperature fragrant soy sauce. According to the invention, the conversion rate of proteins in raw materials is high, and the contents of ammonia nitrogen, total nitrogen, soybean peptides and soybean oligosaccharides in the prepared soy sauce are high.
Owner:好太太食品有限公司

Double-channel ceramic filtering membrane

The invention provides a double-channel ceramic filtering membrane. A main body of the membrane is in a cylindrical shape, the center of a circle is provided with a drainage hole, the periphery of the drainage hole is radially provided with two layers of membrane holes, membranes are coated in the membrane holes, the drainage hole is externally connected with a water outlet pipe, the membrane holes are externally connected with a water inlet pipe, penetrating liquid after being filtered by an inner-layer membrane hole enters the drainage hole under the action of pressure of the water inlet pipe and is recovered by the water outlet pipe, penetrating liquid after being filtered by an outer-layer membrane hole is infiltrated under the action of pressure of the water inlet pipe by the outer wall of the main body of the double-channel ceramic filtering membrane and is also recovered so as to form double channels, and the water inlet pipe and the membrane holes are sealed; moreover, the compactness degree of the water inlet pipe is greater than the compactness degree of the membranes in the membrane holes, and a plurality of grooves are integrally arranged on the outer circumference of the main body of the membrane in an axial direction; and moreover, the width of the grooves is greater than the diameter of the membrane holes. According to the double-channel ceramic filtering membrane, the path of liquid reaching a penetrating side from a material inlet side in the main body of the membrane is shortened, one penetrating side is added for the inner-layer membrane hole which is adjacent to the drainage hole by the drainage hole, the filtration resistance is greatly lowered, and the filtration efficiency is enhanced.
Owner:NINGBO FOUNTAIN WATER TECH

Method for producing marsh gas by utilizing corn cob fungi slag as raw material through anaerobic fermentation

InactiveCN102153261AIncrease profitSolve the problem of random discarding and polluting the environmentBio-organic fraction processingWaste based fuelBiotechnologySlag
The invention discloses a method for producing marsh gas by utilizing corn cob fungi slag as a raw material through anaerobic fermentation. The method comprises the following steps: mixing the fungi slag wasted after corn cob is used as a main raw material to cultivate edible fungus with pig manure or cow dung, adding a methane reagent, and carrying out pile fermentation; and putting fermentationraw materials in a household methane-generating pit or an anaerobic reactor, wherein the addition amount of the raw materials is 80-130 kg per cubic meter of pit volume. In the invention, generation of methane via anerobic fermentation is achieved by carrying out reasonable proportioning, pretreatment, pile outside the pit, fermentation starting and the like on the fermentation raw materials, thereby effectively solving the problem that the pollution is caused by discarding the fungi slag at random and simultaneously turning waste into wealth. After the method is utilized, the gas can be normally generated by the fungi slag in the household, and the method is simple with no need of special equipment and can be applied and disseminated in edible fungus cultivating households.
Owner:INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI

Fabrication method of needling/spunlace and electrostatic spinning compound filtering material

The invention belongs to the technical field of textile, and particularly relates to a fabrication method of a needling/spunlace and electrostatic spinning compound filtering material. The method comprises the steps of fabricating a high-performance filtering material substrate by a needling method or a spunlace method, fabricating a high-performance filtering material surface layer by electrostatic spinning, placing the fabricated filtering material surface layer on the filtering material substrate, compounding by hot rolling at a temperature that is equal to or higher than a melting point of a low melting point fiber within 20 DEG C, and fabricating the high performance filtering material. The warpwise breaking strength of the fabricated high-performance filtering material is greater than or equal to 900N/5cm, and the weftwise breaking strength of the high-performance filtering material is greater than or equal to 1200N/5cm. According to the method, the novel high-performance filtering material is fabricated by a high-strength needling/spunlace filtering material and a high-filtration-performance electrostatic spinning fiber layer; the novel high-performance filtering material is high in filter efficiency, low in resistance, and high in breaking strength; the low-melting point fiber is mixed on the upper surface layer of the needling/spunlace filtering material to fabricate a needling/spunlace felt substrate; the felt substrate is compounded with the electrostatic spinning surface layer by the hot rolling; and a stable structure of the filtering material is formed by heat setting.
Owner:孙熙
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