57results about How to "Well-developed structure" patented technology

The invention discloses a preparation method of porous graphene. The method comprises the steps of: (1) stripping graphite oxide in a water / ethanol mixed solution with pH of 9-10, adding a chemical foaming agent and mixing them uniformly, carrying out filtering and drying to obtain a solid mixture; (2) placing the mixture in a reducing atmosphere, and performing heating expansion reduction to obtain expanded graphene; (3) blending the expanded graphene with strong base, and conducting high temperature activation; and (4) washing the product with hydrochloric acid and deionized water, and performing drying so as to obtain porous grapheme. The porous graphene prepared by the method involved in the invention has a specific surface area up to 2075m<2> / g, a pore volume up to 1.8cm<3> / g, and an average pore size of 1-7nm. As a supercapacitor electrode material, the specific capacitance can reach 155F / g under a current density of 1Ag<-1>. As a porous graphene electrode, the specific capacitance can reach 84.4% along with the increase of current density from 0.2Ag<-1> to 20Ag<-1>. The porous graphene has high specific capacitance and cycle stability. The preparation method disclosed in the invention has the advantages of simple process, low cost, and easy scale production.

The invention discloses a 40-thousand-ton hard carbon black reaction furnace and a production process of carbon black. The carbon black reaction furnace comprises a combustion chamber, a venturi tube, a reaction chamber, and a quench zone. The uniquely designed combustion chamber of the reaction furnace ensures that the distribution of the temperature field of the carbon black production is more reasonable, the appropriate angle, length and inner diameter of the venturi tube ensure that raw oil is fully vaporized and sheared on the venturi tube part; and the reasonably designed reaction section and the matched quench zone ensure that the carbon black cracking reaction can be performed quickly, and the side reaction can be inhibited. Coal gas or natural gas is used as a fuel, the range of the raw oil is wider, the production capacity of the carbon black is high, unit consumption is low, a small amount of polluted product is discharged and the quality of the carbon black is high.

The invention relates to a wastewater treatment technology for manual wetland by using a reinforced compound stuffing in a multilevel shift process, which comprising the following steps: firstly, the wastewater is sent into a desilting basin unit to remove the sundries and suspended substances in the water body; secondly, the wastewater is sent into the wetland group unit to be purified and then discharged; wherein, the wetland group unit comprises a plurality of vertical current wetland units connected in series with each other and the wastewater is sent into the wetland units in sequence during the purifying treatment. When one wetland unit is in the process of purifying wastewater, the other wetland units are kept in an empty bed status. The invention has the advantages that firstly, the shift between the anoxic form and the aerobic form is realized in time and space, the denitrification capability of the wetland system is increased greatly and the problem that the bed is blocked due to the excess growth of the biomembrane on the stuffing carrier is avoided; secondly, the water quality of the effluent is favorable, the elimination efficiency of nitrogen and phosphorus is up to 95%, the effluent of the domestic wastewater treated by the technology can reaches the wastewater renovation standard; thirdly, the shock resistance loading ability of the system is high, the occupied area is small, the technology is not only suitable for domestic wastewater in urban areas, wastewater with high concentration nitrogen and phosphorus, but also applicable for lake and river water bodies which are seriously eutrophicated.

The invention discloses an eggplant straw modified activated carbon water purifying agent which is prepared from the following raw materials in parts by weight: 40-50 parts of eggplant straw, 110-120 parts of activated carbon, 3-6 parts of magnesium nitride powder, 10-15 parts of bentonite, 15-20 parts of industrial aluminum sulfate, 4-7 parts of jade powder, 4-7 parts of medical stone powder, 8-10 parts of sepiolite powder, 10-15 parts of corn starch, 4-5 parts of modified diatomite and a suitable amount of water. By using eggplant straw as a raw material for production, the eggplant straw modified activated carbon water purifying agent disclosed by the invention has the advantages of developed activated carbon pore structure, large specific surface area, high adsorption speed, good adsorption capability to various solutes, free gases and the like; the use of stone powder of bentonite and the like has the effects of bacterium inhibition, decoloration, ionic exchange and release of microelements beneficial to a human body; the use of aluminum sulfate can be used for flocculating pollutants in water. The eggplant straw modified activated carbon water purifying agent disclosed by the invention is safe, nontoxic, and suitable for water purification and indoor air purification.

The invention discloses a method for realizing carbon coating of lithium iron phosphate through radio frequency plasma enhanced chemical vapor deposition. The method comprises the following step of: putting lithium iron phosphate into a reaction chamber to make the lithium iron phosphate react for 15-60min in reactant gas under radio frequency plasma, wherein the total air pressure of the reaction chamber is maintained to be 8-30 Pa, the output power of the power supply of the radio frequency plasma is 40-100W, and the reactant gas is acetylene or the mixed gas of hydrogen and methane with a volume ratio of 1:1. A carbon-coated film generated by utilizing the method has the advantages of uniform component and easy control of the thickness as well as low temperature and short reaction timecompared with the carbon-coated film generated by utilizing the conventional chemical vapor deposition. A prepared carbon-coated LiFePO4 material has good crystal structure growth, no impurity phase in an XRD (X-Ray Diffraction) testing result, large specific capacity and excellent multiplying power performance and cycle performance. When the material forms a button type with metal lithium to simulate a battery test under the conditions of 0.5C and 1C, the discharge capacities for the first time are respectively 166.0mAh.g<-1> and 165mAh.g<-1>, and the capacity retention rates after 50 cyclesare respectively 99.5 percent and 99.3 percent.

The invention discloses chemically-modified hard asphalt and a preparation method thereof. The chemically-modified hard asphalt comprises the following components in parts by weight: 100 parts of basic asphalt, 0.5-3.0 parts of polyphosphoric acid, 2-12 parts of ductility increasing agent mother liquor and 0.2-0.4 part of a surfactant. The preparation method comprises the following steps: adding polyphosphoric acid into the melted basic asphalt for chemically-modified reaction, then adding the ductility increasing agent mother liquor for further reaction, and finally adding the surfactant for further reaction for a period of time to prepare the chemically-modified hard asphalt. The whole process is implemented under a high-speed stirring condition. The chemically-modified hard asphalt prepared by the preparation method disclosed by the invention is high in flow resistance, high in softening point, high in low-temperature ductility, high in bonding property with aggregate, and excellent in high temperature stability, low temperature cracking resistance, fatigue resistance and water invasion resistance; the chemically-modified hard asphalt is particularly suitable for areas with high temperature, wet areas and areas with large diurnal temperature difference and can be used for paving a pavement of a traffic road, so that common pavement damage phenomena such pavement rutting, upheaval, fatigue cracking, low-temperature cracking and water invasion of the pavement are effectively prevented, and the service life of the pavement is prolonged.

A jute stalk modified active carbon is prepared by the following raw materials by weight: 130-150 parts of jute stalk, 4-6 parts of zeolite, 7-9 parts of silica gel, 10-15 parts of active carbon fiber, 7-9 parts of palygorskite, 7-9 parts of bentonite, 6-8 parts of polyacrylic acid, 8-10 parts of humic acid, 4-5 parts of rectorite, 4-5 parts of modified diatomite, and a proper amount of water. The jute stalk is used as a raw material to make the produced active carbon have advantages of developed aperture structure, big specific surface area, high adsorption speed, and good adsorption capability for various solutes and free gasses; silica gel is used to make the active carbon have advantages of large adhesion stress and difficult disintegration; active carbon fiber is matched to use to make the active carbon have strong absorption function; and an adsorption value and a methylene blue absorption valve of the active carbon greatly exceed standard values of the national wood water purification first-level active carbon, and the invention develops new raw materials for manufacturing the active carbon.

The invention discloses an entrained-flow bed and a method for recycling sulfur by reducing SO2 in desulfurization pyrolysis gas by using a carbon-based material. The method comprises the following steps: enabling sulfur dioxide-containing gas to enter the entrained-flow bed from a gas inlet below a venturi tube in the entrained-flow bed, accelerating the sulfur dioxide-containing gas by the venturi tube, and then enabling sulfur dioxide-containing gas to carry the carbon-based material conveyed by a powder conveying machine to form a gas-flow fluidized state; under a high-temperature condition, reducing the sulfur dioxide into the sulfur under the catalytic reduction of active coke; enabling produced gaseous sulfur to flow into a separator under the driving of a gas flow to remove solid impurities, and then enabling the gaseous sulfur to enter a reheater for initially cooling and then enter a condenser for cooling again, wherein the sulfur is condensed into liquid sulfur which is collected by a liquid sulfur collecting device, cooled gas enters a catalytic reduction device to reduce a sulfur-containing substance in the gas into sulfur, and produced waste gas is heated by the reheater and is then inflated into the entrained-flow bed for providing energy for a reduction reaction in the entrained-flow bed.

The invention discloses a preparation method of a carbon electrode material with a gradation pore structure for a supercapacitor, belonging to the field of new energy materials. The preparation method comprises the following steps that: polyvinylidene fluoride or polyvinylidene chloride is taken as a carbon precursor, strong base is taken as an activating agent, and splitting gas (HF and HCl) is taken as an absorbing agent, the carbon precursor and the strong base are mixed uniformly, and further carbonized and activated under high temperature to obtain a carbon material with an advanced gradation pore structure, wherein the gradation pore includes a micropore, a mesopore and macropore, aqueous solution electrolyte and organic electrolyte have the properties of high specific capacitance and obvious large current. The method has the advantages of simplicity, environmental protection, easy industrialization and the like. The carbon material is an ideal electrode material of the supercapacitor and also can be used for the fields of electrostatic desalination, catalysis, absorption, gas storage and the like.

The invention discloses a preparation method and application of a magnesium-loaded acid modification expanded vermiculite composite adsorbing material. Acid modification expanded vermiculite is obtained through the acid modification of the expanded vermiculite; or after acid modification expanded vermiculite is further loaded with straw biochar, the modified vermiculite is loaded with a magnesiumsource for the pollution control of black and odorous water; the application achieves the synchronous recovery of nitrogen and phosphorus by adopting a struvite crystallization and precipitation method, improves the reaction efficiency and purifies water; the recycled product of the magnesium-loaded acid modification expanded vermiculite composite adsorbing material is controlled-release fertilizer with the excellent performances, is useful for farmland crop production; and the efficient utilization of the product is realized.

The invention discloses a method for planting lycium ruthenicum in saline-alkali soil and improving soil and fertilizer statuses. The method comprises the steps: improving fertilizer addition and landpreparation; ridging; timely seeding; field management; shape pruning; and harvesting and processing, wherein an improving fertilizer comprises desulphurization gypsum, activated carbon, coal ash, poultry excrements, zeolite, potassium feldspar, felt fiber and blast furnace slag particles which are in the weight ratio: (40-50):(10-14):(8-12):(8-12):(4-8): (4-8):(4-8):(4-6). In the method, the lycium ruthenicum is planted by improving the saline-alkali soil by using the improving fertilizer and a drip irrigation system, the survival rate and yield of the lycium ruthenicum are high, the effecton improving the whole saline-alkali soil is remarkable, and the improving process is green, environment-friendly and pollution-free. Therefore, the method is an application technology worthy of beingpopularized on a large area.

The invention discloses a method for making active carbon by utilizing dyeing sludge. The method comprises the following steps of: a, a pyrolyzing process: drying the sludge and pyrolyzing at the low temperature under the isolated air state; b, an oxidation pickling process; preparing a mixed aqueous solution mixture of potassium permanganate and sulfuric acid, wherein the potassium permanganate is 0.1mol / L-0.2mol / L, and the sulfuric acid is 1mol / L-1.8mol / L; soaking fixed carbon compound in a solid-liquid ratio of 1:(2-2.5), using the filtrate as aluminum ferric sulfate composite type purifying agent after removing heavy metal impurities; and drying the filter residue. According to the method for making active carbon by utilizing dyeing sludge disclosed by the invention, the sludge is used as the material to make the active carbon with low manufacturing cost and high carbon content through a pyrolyzing-oxidation pickling combination process. Moreover, the production process is almost free of pollution to the environment.

The invention discloses nitrogen-rich hierarchical pore biomass charcoal and application thereof, and belongs to the technical field of environment-friendly functional carbon materials. The inventionaims to solve the problems of low nitrogen content, underdeveloped pore structure and the like of the existing nitrogen-doped biomass charcoal. The preparation method comprises the following steps: putting biomass and carbon nitride into a carbonate aqueous solution, uniformly stirring and mixing, drying, heating a dried material to 800-900 DEG C in an inert atmosphere, calcining, washing a calcined product, and drying to obtain a finished product. Nitrogen-rich carbon nitride is adopted as a nitrogen doping agent, high-nitrogen-content doping is realized, and an activator carbonate is added,so that the pore structure of the biomass charcoal is effectively improved, and the biomass charcoal has good low-temperature hydrogen sulfide removal performance.

The invention relates to a resource recycling method of a waste polymeric microfiltration / ultrafiltration membrane, and aims to solve the problem that environmental pollution is caused due to improper treatment of waste polymer microfiltration / ultrafiltration membranes. The method comprises steps as follows: step one, the waste filtration membrane is cleaned and dried; step two, a polymer solution is prepared; step three, a polymeric absorption resin particle suspension liquid is prepared; and step four, the polymeric absorption resin particle suspension liquid is post-processed, and polymeric absorption resin particles are obtained. According to the method, the waste filtration membrane is taken as a raw material, and polymeric absorption resin is prepared with a nonsolvent-induced phase separation method, so that harmless treatment and resource recycling of the waste filtration membrane are realized, and the method has good environmental benefits and economic benefits. The method is applied to the field of water treatment, chemical engineering and the like.

The invention relates to a production method of porous carbon materials, in particular to a method for adjusting matching combination of pores of coal-based porous carbon on the basis of catalytic activation of a trace amount of a potassium source. The problems to be solved are that in a traditional physical activation production technology of coal-based porous carbon, a specific surface area / a pore structure is not fully developed, and in a chemical activation technology, the usage amount of an activator is large. According to the method for adjusting matching combination of the pores of thecoal-based porous carbon on the basis of catalytic activation of the trace amount of the potassium source, coal is used as a raw material, and by means of catalytic effects of potassium-based metal salts on physical activation processes, development of the pore volume and a specific surface area of porous carbon in a production process is enhanced. The method for adjusting matching combination ofthe pores of the coal-based porous carbon on the basis of catalytic activation of the trace amount of the potassium source comprises (1) raw material refining, (2) adding of potassium-based substances, (3) high-temperature activation, (4) cleaning of activated products and (5) drying. By changing the kinds and adding proportions of the potassium salts, deep adjustment of the average pore size andmatching combination of the pores is achieved, the specific surface area can be up to 1283.6 m<2> / g, and the total pore volume can be up to 0.93 cm<3> / g. By means of the method, the coal-based porouscarbon materials with excellent performance can be synthesized for different fields of catalysis, gas adsorption, separation and the like.

The invention discloses nitrogen-rich biomass-based activated carbon with a hierarchical pore microchannel structure and application thereof, and belongs to the technical field of porous carbon materials. In order to solve the problems of low nitrogen doping amount, microchannel structure damage and the like in the existing nitrogen-doped activated carbon, the invention provides nitrogen-rich biomass-based activated carbon with the hierarchical pore microchannel structure, and the preparation method of the nitrogen-rich biomass-based activated carbon with the hierarchical pore microchannel structure comprises the following steps: uniformly mixing biomass, melamine cyanurate or a mixed nitrogen source thereof and an activating agent in water, drying, grinding and sieving, and heating to 650-950 DEG C in an inert atmosphere, calcining, washing and drying to obtain the product. The nitrogen-rich biomass-based activated carbon with the hierarchical pore microchannel structure has the characteristics of high specific surface area, high total pore volume, hierarchical pore structure, high nitrogen content, high surface nitrogen content, low activator dosage, low micropore rate and the like, and has excellent desulfurization and decarbonization performance.

The invention discloses a method for preparing a coal tar-based carbon material catalyst for combined removal of nitric oxide and mercury in coal-fired flue gas, belongs to the technical field of energy chemical engineering and aims to achieve combined removal of pollutants in coal flue gas. The method comprises the following steps: firstly, carrying out purification pretreatment on coal tar; andmixing with polyvinylpyrrolidone (PVP), and soaking into a SnCl2 and Mn<2+> ethanol solution to carry out in-situ carrying; and carrying out carbonization and oxidation in sequence, thereby obtaininga coal tar carbon material catalyst. The coal tar carbon material catalyst prepared by using the method is of a rich pore structure and has a high specific surface area. As the coal tar is adopted asa raw material, the raw material is cheap and easy to obtain, the prepared catalyst is high in mercury removal and denitration efficiency, that is, the efficiency is up to 95% or greater, the catalystis long in service life and good in regenerability and can be popularized and applied, and a novel technical scheme is provided for novel and efficient utilization of the coal tar, and can be popularized and applied.

The invention belongs to the technical field of sewage treatment, aims to solve the problems of resource waste, high cost of activated carbon applied to wastewater treatment and the like in treatmentof municipal sludge and coal gangue at present, and provides coal gangue sludge-based activated carbon as well as a preparation method and application thereof in mediation and enhancement of anaerobicdigestion of sewage. The method comprises the following steps: respectively grinding and crushing municipal sludge and coal gangue, uniformly mixing, adding a ZnCl2 activating agent, dipping, drying,heating, activating, soaking with hydrochloric acid, and drying to obtain the coal gangue sludge-based activated carbon. The coal gangue sludge-based activated carbon is applied to anaerobic digestion treatment of organic wastewater. Through activation, rich porous structures are formed on the surface of the coal gangue sludge-based activated carbon, functional groups are also changed, and the accumulated gas production rate in the anaerobic reaction process can be remarkably increased. The instantaneous adsorption effect of sludge on organic matters can be weakened, the acid stress phenomenon in the reactor is effectively relieved, and the stability of an anaerobic digestion system is enhanced.

The invention provides a method for rapidly preparing porous magnetic active coke based on dewatered sludge. The method includes the steps: drying the dewatered sludge by air and crushing the dewatered sludge into sludge particles; placing the dried sludge particles into a stainless steel reactor, adding distilled water, sealing the stainless steel reactor, performing magnetic stirring and performing reaction after heating; performing cooling, cleaning and vacuum filtering after reaction to obtain a precursor product; immersing the precursor product into activating agent and catalyst solution,performing sealing and vibrating after immersion, performing vacuum filtering, and performing heating and reaction after air drying; cooling, cleaning and drying the solution to obtain the porous magnetic active coke. The method is simple and rapid in technological process, good in safety, mild in reaction and low in energy consumption, the prepared active coke is developed in porous structure, has good magnetism, is easily recovered and recycled, can be widely applied to waste water and waste gas treatment and has remarkable economic and environmental benefits, and the field of sludge recycling is greatly widened.

The invention belongs to the field of white carbon black, and discloses a preparation method of hydrophobic white carbon black with controllable particle size and a core-shell structure. The preparation method disclosed by the invention comprises the following steps of: preparing a sodium silicate solution, adding an acid catalyst into the sodium silicate solution, adjusting the pH value of an obtained system to be 10 to 10.5, reacting for 20-35 minutes, continuously adding the acidic catalyst, regulating the pH value of the system to 3.5-4.6, reacting for 40-60 minutes, adding a hydrophobic modifier, adding a cosolvent, reacting for 1-12 hours at 50-80 DEG C, and carrying out filter pressing, washing and drying to obtain the hydrophobic white carbon black with the core-shell structure. According to the preparation method, the number of hydroxyl groups on the surface of the white carbon black is reduced through a co-condensation method of the white carbon black and the hydrophobic modifier, and aggregation of the white carbon black in the drying process is reduced, so that the preparation of the white carbon black with controllable particle size, good hydrophobicity, high specificsurface area and high oil absorption is realized.

The invention discloses active brown coal and a preparation method thereof. Technical indicators of the active brown coal are as follows: an iodine value ranges from 300mg / g to 600mg / g; stacking density ranges from 450kg / m<3> and 700kg / m<3>; a phenol value is more than 100%; a PH value ranges from 6 to 9; a macropore ratio ranges from 80% to 90%; and granularity Dmax is less than 1mm. The preparation method comprises the following steps that: raw coal of the brown coal is crushed and screened, and particles after crushing and screening are subjected to integration processing of carbonization, oxidization and activation, then cooled and finally sealed and packaged. The active brown coal preparation method is simple; the prepared active brown coal has the advantages of being stable in property, developed in macropore structure, applicable to adhesion, auxiliary vitality and growth of microorganisms, rich in surface chemical functional group, high in catalytic activity and low in cost; and the prepared active brown coal can be adopted as a substitute of the conventional active carbon to be used in the sewage treatment field and solves the problem that the conventional active carbon is poor in bioactivity and high in cost when being used in the sewage treatment.

The invention discloses a magnetic micropore-rich carbon-based cobalt catalyst based on a space confinement effect and a preparation method and application thereof, and the preparation method comprises the following steps: step 1, preparing positive bivalent cobalt salt, 2-methylimidazole and polyvinylpyrrolidone into a solution, mixing and stirring, and synthesizing a modified cobalt-based metal organic framework material by adopting a hydrothermal method; 2, the modified cobalt-based metal organic framework material is put into a tubular furnace to be carbonized, and a porous carbon-based cobalt catalyst is obtained; and step 3, etching the porous carbon-based cobalt catalyst by using acid to obtain the magnetic micropore-rich carbon-based cobalt catalyst based on the spatial confinement effect. The prepared catalyst can effectively activate persulfate and efficiently remove dye and phenol organic pollutants, meanwhile, in the sewage treatment process, the mass transfer process can be effectively promoted, then the pollutant degradation or separation efficiency is improved, and in addition, the catalyst can be recycled through a magnet after sewage treatment is completed.

The invention discloses a method for treating excess sludge of a sewage plant. The method is characterized by including the steps of firstly, mixing the excess sludge of the sewage plant with sludge of a water supply plant according to the volume ratio of 1:(0.1-0.3), and stirring, wherein the water content of the sludge of the water supply plant is 68-73%, and the sludge of the water supply plate is generated by the coagulating sedimentation and filtering sterilizing treatment process, using polyaluminum chloride as the coagulant, of the water supply plant; secondly, dewatering the stirred mixed sludge, to be more specific, placing the stirred mixed sludge in a centrifugal machine, and performing centrifugal dewatering at the rotation speed of 2600-3800r / minute for 10-30 minutes. The method has the advantages that the problems that the sludge water amount of the city water supply plant is large and the sludge water is difficult to treat are solved, the sludge water is reused to treat the excess sludge of the sewage plant, the sludge water treatment problem of the water supply plant is solved, the economic cost of the water supply plant is reduced, the use amount of sewage plant coagulant and conditioning agents before access sludge dewatering is reduced, and the treatment cost of the sewage plant is lowered.

The invention discloses chemically-modified hard asphalt and a preparation method thereof. The chemically-modified hard asphalt comprises the following components in parts by weight: 100 parts of basic asphalt, 0.5-3.0 parts of polyphosphoric acid, 2-12 parts of ductility increasing agent mother liquor and 0.2-0.4 part of a surfactant. The preparation method comprises the following steps: adding polyphosphoric acid into the melted basic asphalt for chemically-modified reaction, then adding the ductility increasing agent mother liquor for further reaction, and finally adding the surfactant for further reaction for a period of time to prepare the chemically-modified hard asphalt. The whole process is implemented under a high-speed stirring condition. The chemically-modified hard asphalt prepared by the preparation method disclosed by the invention is high in flow resistance, high in softening point, high in low-temperature ductility, high in bonding property with aggregate, and excellent in high temperature stability, low temperature cracking resistance, fatigue resistance and water invasion resistance; the chemically-modified hard asphalt is particularly suitable for areas with high temperature, wet areas and areas with large diurnal temperature difference and can be used for paving a pavement of a traffic road, so that common pavement damage phenomena such pavement rutting, upheaval, fatigue cracking, low-temperature cracking and water invasion of the pavement are effectively prevented, and the service life of the pavement is prolonged.

The invention discloses a green healthy black carp fodder containing no hormone. The fodder is prepared from the following raw materials in parts by weight: 25-45 parts of corn, 18-25 parts of wheat, 4-18 parts of potato, 25-34 parts of cotton seeds, 5-12 parts of bean pulp, 10-20 parts of rape seed cake, 14-18 parts of sesame-seed cake, 2-8 parts of fermented tea seed cake, 4-8 parts of soybean, 1-5 parts of spiral seaweed powder, 4-12 parts of corn germ meal, 2-4 parts of bamboo powder compound zeolite, 0.5-1.2 parts of calcium hydrophosphate, 0.1-0.2 part of yeast powder, 0.2-0.6 part of glycine betaine, 0.5-1.5 parts of tea polyphenol, 0.2-1 part of apple polyphenol, 0.2-0.8 part of tryptophan, 0.01-0.06 part of multi-vitamins and 0.02-0.1 part of a compound mineral substance. The green healthy black carp fodder disclosed by the invention contains no hormone, is healthy, is harmless to human health, is reasonable in nutrition proportion and is capable of restraining fat accumulation on abdomen and mesentery, so that the meat of the cultivated fish is fresh, tasty and fragrant.

The invention discloses a bio-based photothermal conversion material and a preparation method and application thereof, and belongs to the technical field of solar photothermal conversion. The invention aims to solve the technical problems of complex preparation method and high cost of an existing photothermal conversion material. The bio-based photothermal conversion material is prepared by the following steps of: ultrasonically treating shaddock peel with absolute ethyl alcohol, cleaning, drying, uniformly coating the surface with a dispersion liquid and curing. The preparation method specifically comprises the following steps of: 1, putting shaddock peel into absolute ethyl alcohol for ultrasonic treatment, then repeatedly washing with deionized water until the ethyl alcohol is completely removed, and then drying; 2, uniformly mixing acetone and absolute ethyl alcohol, then adding epoxy resin, a dispersing agent and carbon black, and sanding until the mixture is uniformly dispersed to obtain a dispersion liquid; and 3, uniformly coating the dispersion liquid obtained in the step 2 on the surface of the shaddock peel treated in the step 1, and curing to obtain the bio-based photothermal conversion material. The material is used for sewage treatment and seawater desalination.

The invention provides a method for preparing high F ratio oligopeptide by virtue of ultrasonically destructed wheat protein. The method sequentially comprises the following steps: (1) preparing a wheat protein suspension according to a material-to-water ratio of 1: (8-13) by mass, and implementing ultrasonic destruction under a power of 220-250W for 8-2min; (2) adding 1.5-3.0% of papain by mass, uniformly mixing all materials, regulating pH value to 6.5-8.5, and preserving a constant-temperature condition of 35-55 DEG C for 120-60min; (3) adding 8-12% of carboraffin in terms of a total volume, regulating pH value to 6.0-7.5, implementing stirring at 40-50 DEG C, implementing decolorizing and debitterizing treatment for 4-3h, then implementing fine filtration, removing the carboraffin, and implementing sterilizing treatment, so that an oligopeptide fine filtrate is obtained; and (4) implementing drying. According to the method provided by the invention, the wheat protein is degraded by virtue of an ultrasonic destruction technique instead of alcalase and excision flavourzyme; therefore, the method is simple in process, low in cost and convenient for implementation of large-scale industrial production. The finished product (the high F ratio oligopeptide) prepared by the invention is applicable to biological medicines, food, health-care products, flavors and fragrances as well as animal feeds.

The invention discloses blood pressure lowering health care green tea and its preparation method. The method comprises: mixing 15-30 parts by weight of white tea, 20-25 parts by weight of zinc-selenium tea, 20-25 parts by weight of green tea, 20-30 parts by weight of baked green tea or Maofeng tea, 5 parts by weight of folium llicis latifoliae, and 5 parts by weight of chrysanthemums, wherein, the free amino acid content of the white tea is over 7%, the zinc-selenium tea has Zn content of 80-120mg / kg and Se content of 0.25-0.35mg / kg, the green tea has free amino acid content of more than 5%, and the baked green tea or Maofeng tea has tea polyphenol content of over 30%; then mixing the well mixed tea with crushed kenaf accounting for 20-30 wt% of the mixed tea uniformly, and storing the mixture for 30-60d, then conducting screening to filter out kenaf, and carrying out fragrance increasing at a temperature of 150DEG C for 10-12min, and performing depilation at a temperature of 110DEG Cfor 12-15min, thus obtaining the product. With high content of water extract, tea polyphenol and amino acid as well as low caffeine, the health care green tea of the invention plays an active role inprotecting a normal ultrastructure of the cardiac muscle.