146results about How to "Add a small proportion" patented technology

The invention relates to a milking sow concentrated feed, mainly comprising the main components such as fat powder, fish meal, puffed corn powder, natural plant extract, lysine, phytase, electrolytic mixture, choline, composite vitamin supplement, salt, rock powder, calcium hydrogen phosphate, mineral elements such as iron, zinc, copper, manganese, iodine, cobalt, selenium, chromium and the like, and accessories such as antioxidant, mildewproof agent, feed carrier and the like. The feed has multiple nutritional components, which can improve synergistically the lactation ability and proliferation ability of milking sows. Meanwhile, the content of the concentrated feed provided by the invention in daily ration is 10 % (according to weight percentage), the concentrated feed is easy to mix evenly and conducive to solve the problems that the methods for preparing feeds and controlling quality are not enough.

The invention relates to a reductive degradable stabilizer for heavy metal and / or organic matter polluted soil as well as a preparation method and use of the stabilizer. The reductive degradable stabilizer can be used for quickly and efficiently stabilizing the heavy metals and the organic matters in the polluted soil by virtue of a synergistic effect of a plurality of active ingredients, and can also be used for further lowering the content of the organic matters, so that the purpose of lowering leaching toxicity of pollutants and health risk is realized; therefore, the reductive degradable stabilizer is a novel and efficient stabilizer which has the advantages of being wide in treatment substrate, capable of reducing the total amount of the organic matters, good in stabilizing effect, convenient to operate and the like, and has a wide range of application in the governance fields including polluted soil, bottom mud, sludge and the like.

The invention relates to a method for preparing flame-retardant low-smoke halogen-free hot-vulcanized silicone rubber compounds for metro vehicles, which is characterized in that the method comprises the following technological process: adding methyl vinyl silicone rubber to a kneading machine; adding white carbon black and hydroxyl silicone oil; mixing the materials for 1+ / -0.1 hour at a nitrogen-supplying speed of 5+ / -0.1 cubic meter / hour at a temperature between 170 and 190 DEG C; cooling to 60+ / -5 DEG C; adding porcelainizing powder, aluminum silicate, chloroplatinic acid, zinc stannate and aluminum hydroxide; continuing to mix for 0.5+ / -0.05 hour; discharging the materials; filtering rubber in a rubber filter; cooling the obtained product to room temperature; adding 2,5-dimethyl-2,5-bis(tert-butylperoxy) hexane or peroxide bis(2,4-dichloro-benzoyl) serving as a curing agent to an open mill; mixing well; and obtaining the flame-retardant low-smoke halogen-free hot-vulcanized silicone rubber compounds for metro vehicles. As the method adopts halogen-free flame retardant and particularly adopts a porcelainizing smoke-cutting technique, smoke almost completely disappears after the product produced by the method burns for a plurality of minutes, and the inside of the product can be kept in good condition.

The invention relates to a material for a waste asphalt regeneration pavement and a preparation method of the material and belongs to the field of construction and maintenance of road engineering. For improving the property of waste asphalt and lowering the maintenance cost of the road, the invention provides a material for waste asphalt regeneration pavement and a preparation method of the material. The material for the waste asphalt regeneration pavement comprises lightweight oil, plasticized components, a modified main agent, tackifying components and a stabilizer, and the selection range and constitution of all components are specifically limited. Aging tests and low-temperature performance show that the viscoplastic performance of the regenerated asphalt and the anti-crack property and durability of the pavement can be greatly improved when the material for waste asphalt regeneration pavement is used for regeneration of the waste asphalt; therefore, the material for waste asphalt regeneration pavement has a bright application prospect.

The invention discloses a wheel-sticking-free emulsified asphalt, a preparing method, a construction technology and application of the wheel-sticking-free emulsified asphalt. The wheel-sticking-free emulsified asphalt is prepared from, by mass, 10-50% of matrix asphalt, 10-50% of hard asphalt, 0-5% of a polymer modifier, 0.3-3% of an asphalt emulsifier, 0-1% of a thickening agent and the balance an acid-base regulating agent and water to reach 100%. The preparing method comprises the steps that firstly, the polymer modifier, the asphalt emulsifier and the thickening agent are added into water, the pH value is regulated, and a soap solution is prepared; then, the matrix asphalt is heated to 150 DEG C, the hard asphalt is heated to 160 DEG C, the matrix asphalt and the hard asphalt are stirred evenly in a stirring state, the obtained mixed asphalt and the soap solution are subjected to high-speed shearing with a colloid mill together, and the emulsified asphalt is obtained, wherein the emulsifying process is simple and practical. The emulsified asphalt has the effect of being free of wheel sticking when serving as road tack coat oil, tack coats are prevented from being damaged by construction equipment or transportation vehicles, the construction efficiency is improved, and the effect of preventing environment pollution is also achieved.

The invention relates to a self-shielded flux-cored wire containing polyvinylidene fluoride resin, which comprises a shuck manufactured by adopting the home-made SPCC common mild-carbon steel strip. The invention is characterized in that flux core of the common mild-carbon steel strip consists of villaumite, carbonate, oxide, Manganese (Mn), Silicon (Si), Aluminum (Al), Magnesium (Mg), Nickel (Ni) and ferrous powder jointly; wherein, the components of the flux core include 20 percent to 45 percent of the villaumite, 4 percent to 13 percent of the carbonate, 4 percent to 15 percent of the oxide, 1 percent to 5 percent of Mn, 1 percent to 3 percent of Si, 3 percent to 8 percent of Al, 3 percent to 7 percent of Mg, 0 percent to 5 percent of Ni and ferrous powder serving as the rest. The invention has the advantages that the defects that the pore sensitivity of the self-shielded flux-cored wire is high and the impact toughness of the deposited metal is not excellent; when the multi-layer welding is carried out, the surface blowhole is not generated, the complete slag coverage is achieved, the slag can be easily detached, the weld can be formed well and the impact toughness of the deposited metal is high and stable; the concentration of the hazardous substances in the welding fume is lowered and the invention is beneficial to the health of the welder.

The invention provides a high conductivity polycarbonate (PC) composite material and a preparation method thereof. The polycarbonate composite material is prepared from the following components in parts by weight: 40-60 parts of PC resin, 10-30 parts of conductive master batch, 10-30 parts of reinforcing filler, 2-6 parts of toughening agent, 0.08-1.5 parts of first antioxidant and 0.05-3.0 partsof first lubricating agent, wherein the conductive master batch is prepared from the following components in parts by weight: 40-70 parts of thermoplastic resin, 30-50 parts of conductive filler, 0.1-0.6 part of second antioxidant and 0.5-2 parts of second lubricating agent. The PC composite material provided by the invention has very good electrical conductivity, and the volume resistivity of thePC composite material can reach 10<2> omega.m. Furthermore, the addition ratio of the conductive filler material is lower; when the adding amount of the conductive filler is about 10%, the volume resistivity can reach 10<4> omega.m or below, but the composite material can maintain good mechanical properties. In addition, the high conductivity PC composite material also has higher fluidity and lowwarping property, thus being suitable for performing injection molding on large-size workpieces.

The invention discloses a linked stabilizing agent for repairing heavy metal contaminated soil and a repairing method thereof. The linkage stabilizing agent comprises: a first agent comprising ferrous sulfate and montmorillonite, and a second agent comprising sulfide, calcium hydroxide, calcium oxide and silicon dioxide. The repairing method comprises the following steps of: (1) adding the first agent to the heavy metal contaminated soil, and stirring the first agent and the heavy metal contaminated soil for maintenance; and (2) adding the secondary agent to a mixture obtained in the step (1), and stirring the secondary agent and the mixture for maintenance. The linkage stabilizing agent disclosed by the invention is obvious on treatment effects of complex heavy metal contaminated soil or substrate sludge, is long-lasting in heavy metal stabilization effects, and besides, secondary pollution cannot be caused; the linkage stabilizing agent is small in addition proportion and low in construction cost and has obvious economic benefits.

The invention relates to the technical fields of a vulcanizing agent and a preparation technology of the vulcanizing agent, particularly to a novel platinum vulcanizing agent and a preparation technology thereof. The novel platinum vulcanizing agent comprises a component A and a component B which are respectively added while in use, wherein the component A is the mixture of methyl vinylsiloxane rubber and a 1,3-divinyltetramethyldisiloxane platinum complex compound; the component B is the mixture of methyl hydrogen polysiloxane, gas phase silicon dioxide and an inhibitor. Compared with the prior art, the novel platinum vulcanizing agent disclosed by the invention uses the methyl vinylsiloxane rubber as a carrier, and under the existence of a platinum catalyst, vinyl double bonds and the methyl hydrogen polysiloxane are liable to generate a silicon hydrogen addition reaction, so that the purpose of cross-linking vulcanization is realized; the gas phase silicon dioxide is added for adjusting the hardness of vulcanization products, the vulcanization speed is high and is 1 / 3-1 / 2 higher than the vulcanization speed of the conventional platinum vulcanizing agent, and the production efficiency is improved; the vulcanization temperature is 10%-30% lower than that of the conventional platinum vulcanizing agent, and the purposes of energy conversation and environmental protection are achieved; the addition proportion is 30%-50% lower than that of the conventional platinum vulcanizing agent, and the production cost is reduced; the inhibitor is used, the storage time is greatly prolonged, and the storage time can reach 20-48h; in addition, the hygiene grade and the environmental protection grade are high, and the preparation technology is simple.

This invention relates to a technology for extracting and separating pure Y oxide applying HAB as the extractant, TBP as the additive, among which, HAB is composed of HA+HB, HA is secondary hepayl phenoxy instead of acetic acid, secondary octyl phenoxy instead of acetic acid etc. HB is a salt base phosphoric acid P204, P507, Cyanax 272, Cyanex 302.

The invention discloses a modified graphene based composite asphalt modifier. The modified graphene based composite asphalt modifier is prepared from modified graphene and an SBS (Styrene Butadiene Styrene) modifier; the modified graphene is prepared by adding a styrene monomer and lauryl sodium sulfate into an oxidized graphene microchip solution, conducting ultrasonic concussion on the obtainedmixed solution, adding potassium peroxodisulfate, reacting in an oil bath, then adding hydrazine hydrate, raising the temperature to 100 DEG C at the same time, reacting for 4-6 hours, cooling, filtering through a microfiltration membrane, washing and drying. The invention further discloses a preparation method and application of the modified graphene based composite asphalt modifier. The high-and-low temperature performance and the plastic property of the modified asphalt prepared by using the composite asphalt modifier are obviously improved, the anti-rutting performance and the elastic property are greatly improved, the defects of not high durability and not good high temperature property of the SBS modified asphalt are effectively improved, and compared with the graphene microchip notmodified, the dispersibility and the stability of the modified graphene microchip in the asphalt are greatly improved.

The invention provides a method for preparing inorganic mixture by using waste concrete recycled aggregate. The method comprises mixing, by mass percentage, 65-75% of the recycled aggregate with the grain diameter of 0-5 millimeters, 5-15% of the recycled aggregate with the grain diameter of 5-10 millimeters, and 20-30% of the recycled aggregate with the grain diameter of 10-31.5 millimeters, wherein the recycled aggregate is prepared by crushing waste concrete; and then adding cement to obtain the inorganic mixture, wherein the mass percentage of the mixed aggregate is 95.5-97%, and the mass percentage of the cement is 3-4.5%. The method for preparing the inorganic mixture by using the waste concrete recycled aggregate achieves grading design of the inorganic mixture by combination of the characteristics of the waste concrete aggregate and proportioning design, effectively utilizes part of activity of the waste concrete aggregate, reduces the proportion of the added cement, utilizes a large proportion of fine aggregate raw materials of the waste concrete recycled aggregate, and reduces cost.

The invention discloses a high-strength high-temperature-resistant flame-retardant silicone rubber, which comprises the following components in parts by weight: 90 to 110 parts of a methyl vinyl silicone rubber raw rubber, 30 to 50 parts of white carbon black, 10 to 20 parts of ammonium polyphosphate, 1 to 5 parts of zirconium phosphate, 5 to 10 parts of nanometer titanium dioxide, 0.5 to 2.0 parts of nano cerium oxide, 5 to 10 parts of a structured control agent, 0.2 to 0.5 part of an internal demolding agent, 0.1 to 0.5 part of polyethylene glycol, 0.1 to 0.5 part of alcohol modified chloroplatinic acid, 0.1 to 0.5 part of benzotriazole, and 0.5-2 parts of an organic peroxide vulcanizing agent. The invention also provides a preparation method of the high-strength high-temperature-resistant flame-retardant silicone rubber. The high-strength high-temperature-resistant flame-retardant silicone rubber prepared by the invention has excellent physical and mechanical properties, high-temperature resistance, flame retardancy and the like.

The invention relates to a preparation method and a using method of a composite medium capable of adsorbing heavy metals against the current pollution problem of heavy metals such as copper, mercury and the like in a quantity of chemical engineering enterprises. An adsorbing medium with a certain size is obtained by adhering activated carbon, sulfur, sulfides, crop straw powder and mycelia together through a bioactive substance, uniformly mixing 1.0-20.5% of crop straw or mycelia, 1.0-20.0% of sulfur or sulfides, 50.0%-95.5% of activated carbon and 2.5-10.0% of chitosan after acidification and ultrasonic processing according to a certain sequence, granulating, forming and drying. The composite medium can effectively enrich copper, mercury and other heavy metals in industrial waste water and further has an obvious effect on capturing mercury in gas.

The invention discloses a quaternary composite carbon conductive agent, which mainly comprises carbon black, carbon nano-fibers, graphite and quasi-two-dimensional nano carbon. The preparation method of the quaternary composite carbon conductive agent mainly includes the steps: mixing the carbon black and the graphite to form carbon-containing mixture and performing microwave discharge under the protection of nitrogen to generate a conductive agent head product with parts of the carbon nano-fibers; adding dispersing agents, adhesives and solvents into the conductive agent head product to perform wet stirring and ball milling; and obtaining the quaternary composite carbon conductive agent. The quaternary composite carbon conductive agent has the advantages of high conductivity, large specific surface area, high purity, high dispersibility, low addition ratio and the like, the conductivity is higher than 10S / cm, the specific surface area can reach 40 (m2 / g), the ash content is lower than 0.02%, and the addition ratio can be generally smaller than 2%. The quaternary composite carbon conductive agent has excellent conductivity, can be sufficiently dispersed in an electrode and can be used for a high-performance battery.

The invention discloses a silicon rubber internal release agent and a preparation method thereof. The main component of the silicon rubber internal release agent is polydimethyl-methyl trifluoropropyl silicone oil, due to very low surface tension and excellent thermal stability of the polydimethyl-methyl trifluoropropyl silicone oil, the prepared silicon rubber internal release agent can be applied in a harsh temperature environment, has high safety, and is nonirritating and harmless. The silicon rubber internal release agent provided by the invention has the advantages of stable chemical properties, easy dispersion, low adding proportion and the like. When the silicon rubber internal release agent is used for preparation of uniform films and complex-shaped objects, formed products with accurate size and high qualified rate can be obtained.

The invention provides composite water absorbent paper for an absorbent product. The composite water absorbent paper for the absorbent product comprises an upper isolation layer, macromolecular water absorbent resin, a high-fluffy nonwoven fabric and a lower isolation layer, wherein the macromolecular water absorbent resin comprises upper macromolecular water absorbent resin which is distributed between the upper isolation layer and the high-fluffy nonwoven fabric, and lower macromolecular water absorbent resin which is distributed between the high-fluffy nonwoven fabric and the lower isolation layer; the upper isolation layer, the upper macromolecular water absorbent resin, the high-fluffy nonwoven fabric, the lower macromolecular water absorbent resin and the lower isolation layer are combined together in a gluing or heat sealing manner; the composite water absorbent paper is characterized in that the particle size of the upper macromolecular water absorbent resin is different from that of the lower macromolecular water absorbent resin; the particle size of the lower macromolecular water absorbent resin is smaller than that of the upper macromolecular water absorbent resin. According to the composite water absorbent paper for the absorbent product, the absorption performance of the water absorbent paper can be remarkably improved; the utilization rate of macromolecules is improved; the production cost is reduced.

The invention provides a low-temperature phase-change heat storage material and a preparation method thereof. The low-temperature phase-change heat storage material comprises the following components in percentage by weight: 90%-92% of sodium acetate trihydrate, 3%-5% of tetrasodium pyrophosphate decahydrate, 2%-3% of anhydrous sodium carbonate and 1%-2% of polyacrylamide. The preparation method comprises the following steps of: grinding the four components until the granularity is 30-50 meshes respectively, mixing uniformly, and heating the mixture in a water bath at the temperature of 74-79 DEG C, so as to completely melt all the components to form a colloidal liquid; after stirring uniformly, injecting the colloidal liquid into a container, wherein the injected volume is 88%-90% of the volume of the container; and after the colloidal liquid is cooled to room temperature, sealing the container. According to the invention, the adding ratio of an additive is low, the stability of the material is high, the phase-change latent heat is large, the crystallization temperature is moderate, and the supercooling degree is not more than 2 DEG C; and the phase-change heat storage material is the colloidal liquid in melting, so that the phase separation phenomenon is avoided, the preparation process is simple, the packaging is easy and the production is convenient.

The invention discloses a method for simultaneously obtaining organic fertilizers and biological proteins by biologically treating inapplicable fresh tobacco leaves by utilizing lucilia sericata larvae. The method is characterized by comprising the following steps: stirring chips of the inapplicable fresh tobacco leaves and auxiliary materials such as fish meal uniformly to prepare culture materials, inoculating lucilia sericata eggs onto the surfaces of the culture materials, biologically transforming the culture materials by the hatched lucilia sericata larvae, simultaneously transforming the inapplicable fresh tobacco leaves to bio-organic fertilizers, and thus obtaining lucilia sericata maggot biological proteins. The method has the beneficial effects that the inapplicable fresh tobacco leaves are biologically transformed by utilizing the lucilia sericata larvae and the lucilia sericata maggot biological proteins and the high-quality bio-organic fertilizers are generated while the inapplicable tobacco leaves are disposed; about 3-4 tons of commercial bio-organic fertilizers and about 0.8-1.2 tons of fresh lucilia sericata maggots can be produced in the process of treating 10 tons of inapplicable fresh tobacco leaves each time, and thus efficient resource utilization of the inapplicable fresh tobacco leaves is achieved and wastes are turned into useful things; the occupied site is small and can be reused, so that the land usage is not changed; the tobacco leaves only need to be cut up or ground into 2-3cm powder, and thus the grinding cost is remarkably reduced; the energy consumption is low and discharge is less in the treatment process; the returns can be increased as the bio-organic fertilizers and the biological proteins are simultaneously generated.

The invention provides a method for preparing an environment-friendly low-smoke flame-retardant powdered butadiene styrene rubber with the maximum smoke density less than 100 and the oxygen index more than 45%. In the present invention, expandable graphite (EG) is subjected to coating modification by adopting polar latex. Then, styrene-butadiene latex is respectively modified by allyltriphenylphosphorus bromide and a polar monomer through graft polymerization. Finally, the grafted styrene-butadiene latex is mixed with the functionalized EG to directly agglomerate into powder. According to the invention, compatibility between the EG and the butadiene styrene rubber and dimensional stability of rubber particles are significantly improved. The problem that EG is dispersed non-uniformly in a butadiene styrene rubber matrix is overcome and the flame-retardant powdered butadiene styrene rubber is environment-friendly, low-smoke and high-efficient.

The invention discloses a dielectric gradient material. The dielectric gradient material comprises a matrix material and filler particles, wherein the filler particles are dispersed in the matrix material; the dielectric constant of at least one filler particle is greater than 40; the dielectric gradient material comprises a first region, a second region and a third region located between the first region and the second region; the filler particles are arranged in a chain shape towards the second region in the first region; the filler particles are in unordered distribution in the second region; and the filler particles are in ordered to unordered transition distribution in the third region. The invention also provides an application of the dielectric gradient material. The filler particles in the dielectric gradient material provided by the invention are arranged in the chain shape in the first region, are in unordered distribution in the second region and are in ordered to unordered transition distribution in the third region, so that the dielectric gradient material with the dielectric constant with the gradient is constructed; and the dielectric gradient material has the characteristics of being large in gradient range, wide in application range, excellent in performance and the like.

The invention belongs to the field of catalytical combustion supporting, and particularly relates to a combustion-supporting type fuel coal additive and a method for preparing the same. The combustion-supporting type fuel coal additive comprises the following components in mass percent: 53%-68% of mixture of alkali metal oxide, alkaline earth metal oxide and transition metal oxide, 30%-40% of salt oxidant and the balance of metallic oxide active catalyst. Compared with the fuel coal additive in the prior art, the combustion-supporting type fuel coal additive has the advantages of good combustion supporting effect, resource saving, small corrosion in fuel coal equipment, low cost, safety and environmental friendliness.

The invention relates to a method for reducing the carbon monoxide release amount of papermaking reconstituted tobacco, and belongs to the technical field of harm reduction of reconstituted tobacco in the tobacco industry. The method has the main technical characteristic that: specific alkali metal inorganic acid salt is added in the coating or flavoring or filler adding process during the production of the papermaking reconstituted tobacco, so that the carbon monoxide release amount of the papermaking reconstituted tobacco can be effectively reduced, and the smoking quality of a product is not obviously changed, wherein the alkali metal inorganic acid salt is formed by compounding one or more of Li2SO4, Na2SO4, K2SO4, Na2CO3, K2CO3, NaCl and KCl and is added in an amount which is 0.1 to 4 percent based on the mass of the papermaking reconstituted tobacco product.

The invention belongs to the technical field of reproducing tobacco leaf harm reduction in a tobacco industry, in particular to a method for reducing releasing quantity of carbon monoxide (CO) paper-making process reproducing tobacco leaf smoke. In the process of producing paper-making process tobacco leaves, oxide with transition metal is added into a padding adding working procedure or a coating liquid blending working procedure. Adding substances are low in cost, and additive craft is simple. Suction quality of products is not changed obviously, and use of artificial coloring matters can be reduced.

The invention provides a glyphosate-ammonium aqueous solution synergistic aid and belongs to the field of herbicides. The formula of the aid comprises the following components in percentage: 25 to 35 percent of sodium dodecyl benzene sulfonate, 10 to 15 percent of hexadecyl trimethyl ammonium bromide, 6 to 10 percent of alkyl polyglucoside, 5 to 8 percent of lecithin, 0.005 to 0.1 percent of organic silicon deforming agent AF-9000 and the balance of deionized water. For solving the medical effect and cost problems in the prior art, the glyphosate-ammonium aqueous solution synergistic aid which is cheap, can be processed simply and has good effects is provided; when the aid is used for producing glyphosate-ammonium aqueous solution, the used amount is small; and medicine effect tests provethe grass killing effect of the aid is better than that of a reference aid.

The invention discloses a multi-component regenerated fuel based on domestic garbage and a preparation method thereof, which are suitable for resource processing of solid wastes. The regenerated fuel is formed by mixing combustible components in the domestic garbage, coal liquefaction residues, agricultural solid wastes and calcium oxide in proportion, and specifically comprises the following components in percentage by mass: 62.5%-77.0% of the combustible components in the domestic garbage, 10.0%-20.0% of the coal liquefaction residues, 5.0%-14.0% of the agricultural solid wastes and 4.5%-7.5% of the calcium oxide. The preparation method comprises the following steps: firstly separating the combustible components from the domestic garbage; then performing drying, crushing and other pretreatment on the combustible components in the domestic garbage, the coal liquefaction residues and the agricultural solid wastes; further mixing all the components according to the ratio, and uniformlystirring; and finally shaping. The regenerated fuel has the advantages of higher calorific value, stable combustion and low secondary pollution, and can realize resource utilization of the urban domestic garbage and the industrial and the agricultural solid wastes.

The invention discloses a graphene / carbon nanotube compound, a conductive functional polymer and a preparation method. The method includes: mixing graphene and carbon nanotubes to obtain first composite powder; mixing the first composite powder with a first adhesion additive, and stirring to obtain second composite powder; mixing the second composite powder with a solvent and a second adhesive additive, and dispersing to obtain dispersion liquid; centrifugally treating the dispersion liquid to obtain graphene / carbon nanotube paste; subjecting the graphene / carbon nanotube paste to pressure screening treatment to obtain a primary product of the graphene / carbon nanotube compound; subjecting the primary product of the graphene / carbon nanotube compound to pressurized granulation to obtain the graphene / carbon nanotube compound. The graphene / carbon nanotube compound prepared according to the method has large apparent density, great and uniform conductivity and mechanical properties of a polymer material can be achieved, and reduction of potential safety hazards, improvement of a processing forming environment and control of transport cost can be realized.

The invention relates to the field of biotechnologies in freshwater aquaculture, in particular to a biological bottom modifying agent special for fresh water. The biological bottom modifying agent is prepared from, by mass, 60-70 parts of humic acid, 4-8 parts of sodium hydroxide, 6-28 parts of zeolite powder, 6-12 parts of bacillus liquid, 1-2 parts of lactobacillus liquid and 1-2 parts of yeast fungus liquid. The invention further relates to a preparation method of the biological bottom modifying agent special for the fresh water. The method comprises the steps of material taking, dry material mixing, bacterial liquid mixing and granulating. The invention aims at providing the biological bottom modifying agent special for the fresh water and the preparation method thereof. The biological bottom modifying agent can be prepared into bottom modifying granules which are uniform in granule, bright in color and luster and free of dust, bacterial proportion is stable, the biological bottom modifying agent is long in action time after reaching the bottom of a pond, the activity of various microorganism bacterial species can be well guaranteed, the synergistic effect of main components in the product can be well achieved, and a good bottom modifying effect is achieved.

The invention discloses a method for obtaining organic fertilizer and bioprotein simultaneously by biologically treating inapplicable fresh tobacco leaves with chrysomya megacephala larva. The method mixes the inapplicable fresh tobacco leaves with auxiliary materials such as fish meal, guarantees the growth effect of the chrysomya megacephala on basis of scientifically treating the inapplicable tobacco leaves; and finally collects pure larva and breeding residues respectively, thus obtaining two products of nicotine-free bioprotein and organic fertilizer. About 3-4 tons of commercially bio-organic fertilizer and about 0.8-1.2 tons of the nicotine-free bioprotein can be produced by treating 10 tons of the inapplicable fresh tobacco leaves, so that efficient resource utilization of the inapplicable fresh tobacco leaves can be realized and wastes are changed into wealth. The place occupied by the method is small, and can be used repeatedly, without changing land usage. According to the method, the tobacco leaves only need to be cut or chopped into 2-3 cm, so that smashing cost is significantly reduced; a processing process has low energy consumption and few emissions; and the produced bio-organic fertilizer and bioprotein can increase profits.