749results about How to "Stable source" patented technology

A method and system for an automated trading network that continuously collects invisible, anonymous, binding orders and indications of interest to buy and sell specific equity securities at variable, passively determined prices and, then, executes trades based on these collected orders and indications. In general, the binding orders are collected from retail broker-dealers and the binding indications are collected from institutions. The variable, passively determined, non-discrete prices can be linked to the National Best Bid or Offer (NBBO) for each security, or some other prevailing market indicator, at the time a trade is executed. In an embodiment of the method and system, marketable retail orders which match with one or more collected institutional indications, are routed from a Dynamic Order Router (DOR) at each broker-dealer to a Central Order-Match Box (COMB) to be executed against the one or more matched collected institutional indications. The COMB also manages most other aspects of transactions in the method and system and continuously executes trades against the collected institutional indications at improved prices relative to the NBBO.

A method and system for an automated trading network that continuously collects invisible, anonymous, binding orders and indications of interest to buy and sell specific equity securities at variable, passively determined prices and, then, executes trades based on these collected orders and indications. In general, the binding orders are collected from retail broker-dealers and the binding indications are collected from institutions. The variable, passively determined, non-discrete prices can be linked to the National Best Bid or Offer (NBBO) for each security, or some other prevailing market indicator, at the time a trade is executed. In an embodiment of the method and system, marketable retail orders which match with one or more collected institutional indications, are routed from a Dynamic Order Router (DOR) at each broker-dealer to a Central Order-Match Box (COMB) to be executed against the one or more matched collected institutional indications. The COMB also manages most other aspects of transactions in the method and system and continuously executes trades against the collected institutional indications at improved prices relative to the NBBO.

The invention aims at providing a health-care food enhancing immune function of human body and provides a preparation technique thereof. The health-care food, according to weight proportion, is produced by raw materials comprising 10-50 portions of gen-seng, 10-50 portions of glossy ganoderma and 10-50 portions of zymotic cordycepin powder; the raw materials comprising the gen-seng, the glossy ganoderma and the zymotic cordycepin powder are positioned in a hop-pocket; the processed raw materials are carried out heating and decoction for 1-3 times (each time is for 1-2 hours) after being added with water for soaking for one hour; extraction solution is mixed, filtered and concentrated to defined amount; after being cooled, concentrated solution is carried out high-speed centrifugal impurity removal; the obtained concentrated solution is produced into required preparation independently or by adding with accessories acceptable in medical science with the conventional processes of pharmacy.

The invention relates to a method for preparing an anti-stress agent used for fishing, belonging to the technical field of aquatic product compound feed. The method is characterized in that glutamine dipeptide, rhubarb extract, vitamin C, vitamin E, potassium chloride, sodium chloride, anhydrous dextrose and a carrier are taken and fully mixed to be ground and prepared into dry powder. The raw materials of the invention has the advantages of stable source, simple preparation, wide material source and low cost; due to the stress principle of fish body, the anti-stress agent not only supplements Chinese herbal medicines, but also complements western medicine of glutamine dipeptide; the combination of Chinese herbal medicines and western medicine regulates the stress of fish body, and appropriately supplements the loss of Na<>, K<> caused by stress to control the stress of fish body. When in use, the anti-stress agent can be added into feed and directly splashed; the immunity and inhibiting ability of fish body can be improved, the capacity of resisting high temperature and high density as well as infection resistance for resisting hydrophile aeromonas can be improved, and the growth of the fish body can be accelerated.

An anti stress immunity enhancing agent for pig, the weight ratio range of its component and dry matter is: citric acid 13 to 21 percent; oligomerization Fructose 15 to 25 percent; vitamin C 2 to 3percent; vitamin E 0.5 to 1 percent, vitamin B1 0.4 to 1.0 percent; vitamin B12 0.1to 0.6 percent; garlicin 1 to 4 percent; astragalus polyase 1 to 6 percent; bacitracin zinc 3 to 5 percent; the rest is carrier. The said anti stress immunity enhancing agent has reasonable compound, stable material resource, lower cost, simple producing technology, its merit is: increasing feed intake for pig, promoting growth; enhancing immunity of pig, preventing and curing diarrhea, tail-biting, anorexia etc stress symptom during the weaning, transforming, and transfer to group.

The invention discloses a low-protein low-fish meal feed for Litopenaeus vannamei. The content of proteins in a Litopenaeus vannamei feed is reduced by supplementing exogenous methionine, the content of fish meal in the feed is reduced by utilizing bean pulp with plant protein sources and peanut meal, and then the exogenous methionine, the bean pulp and plant protein sources and other raw materials are mixed according to a reasonable proportion to form the low-protein low-fish meal feed for the Litopenaeus vannamei. The using amount of the fish meal in the feed is reduced to be less than 10 percent to the maximum extent, and the problem that amino acid is unbalanced in a single protein source is solved by adding a plurality of kinds of plant protein sources. The content of the fish meal and the content of the proteins in the Litopenaeus vannamei feed are remarkably reduced, and the feed is favorable for reducing the cost, improves the utilization rate of the feed, and reduces the discharge of nitrogen and phosphorus in the aquaculture process so as to reduce environmental pollution. Through feeding experiments for a long time, the results show that when the Litopenaeus vannamei is fed by using the low-protein low-fish meal feed for the Litopenaeus vannamei, the feed has no adverse effect on the growth performance and feed coefficient of the Litopenaeus vannamei, and the discharge amount of nitrogen and phosphorus in water bodies can also be reduced.

The invention discloses a preparation method for an artificially synthesized transparent soil material. The transparent soil material comprises baked silica sand particles and colorless pore fluids which have the same refractive index, wherein the pore fluids are mixed fluids of 12, alkane and 15# white oil; during preparation, a glass bar is used to stir constantly so as to ensure intensive mixing; a vacuum chamber is adopted for vacuumizing so as to remove residual air in a mixture until the mixture is transparent; finally, a consolidometer is adopted for consolidation. According to the invention, the preparation method is simple and convenient to operate and easy to implement; compared with other preparation methods, the preparation method is wide in material sources, low in cost, pollution-free and non-hazardous and can achieve a better transparent effect; the prepared transparent soil can be effectively used for model tests, and metabolic un-embedding visual observation in soil bodies can be realized.

The present invention belongs to the field of aquaculture feed technology, in particular, it relates to an additive premixed material for low-salinity culture of Fanna prawn. Said additive premixed material is composed of vitamin complex and compound mineral matter. Said additive premixed material can be added into prawn feed, and said feed can raise immunity of prawn, and can promote quick growth of prawn, its conversion rate is high and its feed coefficient is 0.9-1.3.

The invention discloses a preparation method and an application of environment-friendly type shield tail sealing grease. The shield tail sealing grease mainly comprises the following components: 14-30% of lubricating oil, 7-22% of oil plasticizer, 3-15% of thickening agent, 3-12% of lubricating grease, 3-8% of natural degradable fiber, 35-60% of filling granular material, 1-3% of coloring agent and 0.1-2% of preservative. The environment-friendly type shield tail sealing grease prepared by using the method is used for sealing a shield tail of a shield tunneling machine in tunnel engineering, and has the advantages of good water pressure sealing performance, excellent pumping performance, high adhesivity, good lubrication, stable properties, no corrosion, antioxidation, wide raw material resources, environment-friendliness and simple preparation process.

The invention discloses an efficient environmental-friendly black carp extrusion compound feed and a production method thereof. The method is characterized by comprising the following steps: mixing large amounts of other raw materials such as fish meal, extruded-soybean, soybean meal, rapeseed meal, cottonseed meal, wheat and rice bran and then coarsely crushing a mixture; adding spray-dried animal blood cells, larvae powder, monocalcium phosphate, choline chloride and salt for evenly mixing, carrying out superfine crushing; adding vitamin premis, mineral premix, rheum emodin, L-carnitine and allicin for evenly mixing; and carrying out steam tempering, extrusion, granulation, drying, spraying, cooling and the like on the mixed materials to obtain the product. The black carp extrusion compound feed is simple to prepare and has comprehensive and balanced nutrition, the digestibility of the black carp on feed nutrient substances can be improved, the feed coefficient is reduced, and the nitrogen and phosphorus emission is lowered. The feed has good palatability, excellent stability in water, and less feed wastes and water pollution. The feed can increase the immunity, antioxidation and anti-stress capabilities of the black carp, and promotes the growth of the black carp.

The invention relates to a compound aquatic product feeding promoting agent used in feed for fish, shrimp and crabs, and belongs to a feed additive. The feeding promoting agent is characterized in that: the feeding promoting agent comprises the following compositions: 25 to 35 portions of dimethyl-beta-propionic acid thetine, 15 to 25 portions of taurine, 15 to 25 portions of alanine, 5 to 15 portions of glycin, 5 to 15 portions of glutamic acid and 5 to 15 portions of nucleotide; and the taurine, the alanine, the glycin, the glutamic acid and the nucleotide are crushed, sieved by a 40-mesh sieve, put into a mixer and added with the dimethyl-beta-propionic acid thetine for even mixing to prepare the compound aquatic product feeding promoting agent. The compound aquatic product feeding promoting agent can improve the food intake of aquatic animals, promote quick growth of the aquatic animals, improve the bait efficiency of the aquatic animals, reduce residual bait to a large extent, greatly reduce pollution to water body and contribute to environmental protection.

Disclosed is an artificial micro-particle feedstuff for pseudosciaenacrocea larvae, which comprises white fish meal, shrimp powder, mussel powder, calamari powder, yeast powder, hydrolyzed fish meat protein, fish oil, alpha-starch, sodium alginate, mineral salts mixture, vitamins mixture, feeding promoting agent, tomatine, ethoxy quinoline, beta-gluglucosan and soya bean lecithin by the weight ratio of 35-45, 10-20, 10-15, 8-12, 3-6, 5-10, 3-6, 6-12, 1-3, 1-3, 1-3, 0.1-0.2, 0.01-0.05, 0.05-0.08, 0.1-0.3 and 5-8.

The invention discloses a special compound feed for crabs. The compound feed consists of soybean meal, rapeseed meal, peanut meal, corn protein powder, spray-dried animal blood cells, fish meal, shrimp meal, four, fish dissolving-pulp protein powder, yeast extract, fish oil, soybean lecithin oil, bentonite, monocalcium phosphate, a mildew preventive, mannan oligosaccharide, glycine betaine, a hulling element, methionine, choline, perilla seed extract, a vitamin premix and a mineral premix. The raw materials of the compound feed are stable in source, high in utilization ratio, balanced in nutrient content and relatively low in cost. The preferred fish dissolving-pulp protein powder enhances the feed attraction of the feed. An advanced puffing process is adopted so as to further improve the utilization ratio and water resistance of the feed and reduce waste and water pollution. Meanwhile, an immune nutrition additive is adopted so as to significantly enhance the immune function and anti-stress capacity of the crabs and significantly increase the survival rate. The compound feed is much greener and more environmentally friendly, and efficiency increase is particularly significant in a high-density river crab breeding mode.

The invention relates to the technical field of aquaculture feedstuff. Premix material consists of composite vitamin and composite microelement according to the mass ratio of 5 to 10:15 to 20, wherein the composite vitamin consists of vitamin A, vitamin D, vitamin E, vitamin K3, vitamin B1, vitamin B2, vitamin B6, vitamin B12, nicotinic acid, calcium pantothenate, folic acid, biotin, inositol, vitamin C, beta-glucan, garlicin, DMPT, astaxanthin, topaz, antioxidant, mildew inhibitor and wheat middlings; and the composite microelement consists of ferric citrate, zinc sulfate, magnesium sulfate, methionine, potassium iodate, manganese sulfate, copper sulfate, sodium selenite, potassium chloride, choline chloride, betaine and zeolite. The invention has stable raw material sources and complete nutrition. A cultivated object grows rapidly with a high feedstuff conversion rate and good cultivating benefits. Compared with crabs eating other feedstuff sources such as rough fish, corn, bean pulp, and the like, the quality of Chinese mitten crab is improved. The invention relates to the feedstuff additive premix material for the Chinese mitten crab.

The invention discloses a Chinese medicinal herb feed additive for controlling nutritional type hepatobiliary syndrome of cultured freshwater fishes. The additive is prepared from the following raw materials by weight (on the basis of one ton of feed): 2,000 to 4,000g of silibinin, 500 to 1,500g of root of red-rooted salvia, 500 to 2,000g of cassia seed, 1,000 to 6,000g of hawthorn, 1,500 to 3,000g of rhubarb, 800 to 2,500g of notoginseng root, 500 to 2,000g of astragalus, 1,000 to 4,000g of motherwort herb, and 1,000 to 4,000g of garlic. A preparation method comprises the following steps of: drying all raw materials, accurately weighing according to the weight, performing ultrafine crushing, sieving with a 60-mesh screen, and mixing uniformly to obtain the Chinese medicinal herb feed additive for controlling nutritional type hepatobiliary syndrome of the cultured freshwater fishes. Through culture experiments on feeds of the cultured freshwater fishes such as grass carps, black carps, carps, crucian carps, bream fish, Tilapia mossambica and the like, the Chinese medicinal herb feed additive has a good effect of treating or preventing nutritional type hepatobiliary syndrome of various freshwater fishes which are cultured at high density; and the Chinese medicinal herb feed additive is safe and efficient after being used for a long time, cultured objects have bright body color and strong vitalities and grow rapidly, the feed conversion rate is high, and the culture benefit is good.

The invention discloses feed for meat-type breeding ducks in egg-laying period, which comprises the following components in part by weight: 30 to 50 parts of corn, 5 to 15 parts of fine rice bran, 5 to 15 parts of wheat, 15 to 25 parts of bean pulp, 2 to 3 parts of fish meal, 1 to 5 parts of corn alcohol lees, 2 to 4 parts of corn albumen powder, 7 to 9 parts of mountain flour, 0.5 to 1.5 parts of calcium hydrophosphate, 0.2 to 0.5 part of table salt, 0.2 to 0.8 part of 65 percent lysine, 0.05 to 0.20 part of methionine, 0.05 to 0.15 part of complex enzyme, 0.02 to 0.05 part of microecological preparation, 0.01 to 0.02 part of phytase and 0.2 to 0.5 part of premix. In the feed, raw material resources are utilized fully, and the egg-laying rate, egg weight and productivity of the breeding ducks can be improved by mixing barley, the wheat and the fine rice bran which serve as main raw materials with vegetable protein, amino acid, microecological products, calcium and various mineral substances and vitamins in appropriate proportion. The feed has low cost, due to the addition of the monomer amino acid and the complex enzyme, the feeding cost of the breeding ducks is reduced substantially.

The invention discloses a preparation method of a breast milk fat structural fat substitute, and belongs to the field of food additives and structural fat preparation. In the method, palm stearin is used as a raw material, the content of palmitic acid at the sn-2 position is improved through a random ester exchange reaction, and then the palm stearin and mixed fatty acid subjected to the random ester exchange reaction are catalyzed by sn-1,3 specific lipase to prepare a structural fat similar to breast milk fat, namely a breast milk fat structural fat substitute mainly comprising 1,3-dioleoicacid-2-palmitic acid triglyceride (OPO). An enzymatic reaction in the method provided by the invention adopts a solvent-free system, the repeated utilization rate of an enzyme preparation is high, andthe safety is good; therefore, the method provided by the invention has the advantages of stable source, low price, simple reaction process, short reaction time, high product content, 84.33% similarity of composition and components between an obtained product and the breast milk fat, controllable quality and the like in the production of the structural fat, and is suitable for large-scale industrial production.

The invention belongs to the technical field of biological pesticides, discloses a Streptomyces l avendulae xjy strain which has been collected in the general microorganism center of CCCCM in 8.16.2007 with the collection number: CCMCC No.2130. The invention also discloses a separation and authentication method for the strain, a preparation method for antibiotic active substances of the Streptomyces l avendulae xjy strain, authentication for analysis structures of the active substances, prevention and cure experiments for metabolic active substances of the xjy strain against leaf muld of tomato, powdery mildew of cucumber and phytophthora blight of pepper, and growth-promoting experiments for the growth of the strain. The antibiotic active substances secreted by Streptomyces xjy strain is mainly nucleosides antibiotic having the characteristics of persistent effect and no medicinal hazard as well as having the effects of obviously preventing and curing vegetable diseases and promoting the growth to a certain extent.

The invention relates to a compound immunopotentiator for post larvae of litopenaeus vannamei, which comprises the following components in percentage by weight: 20-30 percent of beta-glucan, 20-30 percent of chitosan, 5-10 percent of ginsenoside, 10-20 percent of astragalus polysaccharides, 5-10 percent of phospholipid, 40-60 percent of vitamin C-2-polyphosphate ester, 10-15 percent of vitamin E, 5-10 percent of vitamin A, 10-20 percent of bacillus subtilis and 1-5 percent of clamworm powder. The invention has the following advantages that: (1) the problem of feedback inhibition of the post larvae of litopenaeus vannamei is overcome effectively; (2) the immunity of the post larvae of litopenaeus vannamei is enhanced obviously, and the survival rate is increased; (3) the activity and the growth speed of the post larvae of litopenaeus vannamei are increased obviously; (4) the compound immunopotentiator has the addition amount of only 0.2-0.3% when used as a feed additive for a particle feed of the post larvae of litopenaeus vannamei; (5) no adverse effect on the palatability of the feed exists; and (6) the source of the raw materials is stable, the cost is low, and the production process is simple.

The invention discloses chemical compositions of ferrite ductile iron used at low temperature and a manufacturing method of the ferrite ductile iron, determines the range of the chemical compositions of the ferrite ductile iron used at low temperature being minus 40 DEG C and provides a quality standard for the production of qualified and stable ductile iron workpieces. The manufacturing method comprises the steps of adopting pure iron, a carburant and silicon iron as raw materials, synthesizing and melting the raw materials in an electric furnace, conducting spheroidization on the raw materials by utilizing a low-rare-earth spheroidizing agent, and producing the ferrite ductile iron by adopting a combined inoculation method. According to the method, the purity of molten iron is improved stably, and the difficulties of high phosphorus, sulphur, titanium, other imputies and interference elements contents in the molten iron, large fluctuation and instability are solved. According to the method, a novel technical scheme is provided for the production of ferrite ductile iron workpiece which contains small, circular and smooth ductile iron and does not contain cementite and iron phosphide eutectic basically, the ferrite ductile iron can meet the demands of high-performance ferrite ductile iron workpiece in electrical industry, high-speed rail industry and the like, the dependence on imported products can be broken; and the running safety of nuclear power and the high-speed rail can be improved substantially.

The invention provides Chinese herbal medicine additive for improving meat quality of java tilapia, containing by weight of: 22-30% of spatholobus stem, 30-40% of black bean, 10-15% of glycyrrhiza, 5-10% of honeysuckle, 5-10% of radix isatidis and 10-15% of hawthorn. The advantages of the invention comprise: (1) having good phagostimulant effect, (2) substantially reducing fat content and cholesterol level in muscles of java tilapia, substantially increasing flavor substance content of inosinic acid in muscles, improving muscles quality of java tilapia, (3), adding and using conveniently, and directly adding in commercial feedstuff, wherein the components can generates synergistic effect with other additive components in commercial feedstuff, and raise weighting rate and disease resistance of java tilapia, and (4) having stabile raw material resource, low price, simple production process and easy for industrialization production.

The invention discloses a preparation method of a castor-oil plant based biological aircraft fuel. According to the method, castor oil is selected as a raw material, an appropriate catalyst is prepared, and a hydrodeoxygenation reaction and a hydroisomerization reaction are carried out. The preparation method specifically comprises the following steps: hydrogen is blown into castor oil in the presence of a hydrodeoxygenation catalyst so as to generate n-alkanes; hydrogen is blown into n-alkanes in the presence of a hydroisomerization catalyst so as to isomerize to generate isoparaffin; and a fraction is subjected to fractionation so as to obtain the final product. The final product is the biological aircraft fuel which accords with usage requirements (such as American ASTMD7566 standard and the like). The obtained product castor-oil plant based biological aircraft fuel contains no alkene or napthene. By the adoption of the fuel, carbon formation of a motor is remarkably reduced. In addition, the fuel contains no sulfur compounds. When the fuel is in use, environmental pollution will not be caused. The castor-oil plant based biological aircraft fuel is an alternative for replacing a petrochemical aircraft fuel.

The invention relates to anti-stress and puffed mixed feed for ctenopharyngodon idellus and a production method for the feed. The mixed feed includes the following raw materials in mass percentage: 0-8% of meat and bone meal, 2-5% of broad bean albumen powder, 8-18% of soybean meal, 20-30% of rapeseed dregs, 10-15% of cottonseed meal, 10-20% of wheat, 10-20% of tapioca flour, 5-8% of rice bran, 2-4% of soya-bean oil, 0.2-0.4% of 50% choline chloride, 0.9-1.5% of monocalcium phosphate, 1-2% of vitamin premix, 1-2% of mineral premix, 1-2% of zeolite powder, 0.02-0.1% of GSH, 0.01-0.08% curcumin, 0.01-0.03% of tea polyphenol, 0.05-0.1% of taurine, 0.005-0.01% of rheum emodin, 0.01-0.02% of L-carnitine, and 0.02-0.03% of complex enzyme preparation. The anti-stress and puffed mixed feed improves the digestibility and deposition of feeding ctenopharyngodon idellus to nutrient substances of the feed, improves the immune, antioxidant and anti-stress ability of fish body and promotes growing of ctenopharyngodon idellus.

The invention discloses application and a remediation method of calcium polysulfide in chromium-contaminated soil or underground water remediation. Calcium polysulfide is adopted for chromium contamination remediation, and two remediation methods are particularly related. The method for remediating chromium-contaminated soil by calcium polysulfide comprises the following steps: investigating the chromium contamination degree of soil, preparing a calcium polysulfide water agent, determining the adding ratio of the calcium polysulfide water agent, adding the calcium polysulfide water agent, supplying water, carrying out remediation reaction, maintaining soil and adjusting the nature of the remediated soil. The method for remediating chromium-contaminated underground water by calcium polysulfide comprises the following steps: arranging injection points, determining the amount of a remediation agent, preparing the remediation agent, positioning the injection points, injecting the calcium polysulfide remediation agent, adjusting the positions and amounts of the injection points and the like. According to the invention, the operation process is simple; the agents are stable in source; the reaction speed is high; the remediation effect is good; the chromium-contaminated soil or underground water can be stable for a long time after remediation; the remediation method can be applied to large-scale implementation, is economic and reasonable, and is a relatively ideal chromium-contaminated soil or underground water remediation technique.

Compound Chinese medicinal herb immunopotentiator for rudd is prepared from the components by weight: 10 to 20 percent of radix astragali, 10 to 20 percent of honeysuckle, 10 to 15 percent of rhubarb, 10 to 15 percent of eucommia bark leaf powder, 10 to 15 percent of liquorice, 10 to 15 percent of hawthorn, 5 to 10 percent of Rhizoma Atractylodis Macrocephalae, and 5 to 10 percent of safflower. The invention has the following advantages that the compound Chinese medicinal herb immunopotentiator can be used as feed additive in rudd compound feed, and is added in to the rudd compound feed by only 0.1 to 0.2 percent, can remarkably increase the organism immunity and improve the survival rate of rudd, can completely replace antibiotics, has no adverse effect and no residue to the palatability of feed, and has a stable raw material resources, low cost and simple production technology.

The invention belongs to the technical field of feed formulas for meat ducks, and in particular relates to the feed formula for young meat ducks. The feed formula for the young meat ducks is particularly suitable for 0 to 21 day-old meat ducks and comprises the following components in percentage by weight: 6 percent of fish powder, 24.7 percent of bean pulp, 3 percent of soft husks of rice, 61.6 percent of corn, 1.5 percent of corn protein powder and 3.2 percent of additive. The feed formula has the advantages of capability of meeting all nutritional requirements of the young meat ducks, reasonable formula, high bioavailability, low excrement of nitrogen, phosphorus and the like, contribution to environmental protection, good palatability, high feed reward, meat feed ratio of 1.85:1 during the whole process, contribution to improving survival rate, stable source of used raw materials, low price and 30-percent cost reduction.

The invention discloses a flue gas moisture recovery system and method. Flue gas discharged by a boiler sequentially passes a desulfurization tower (1), a first heat exchanger (2) and a second heat exchanger (3), enters a chimney (4) and is discharged, the flue gas passing the desulfurization tower (1) is cooled by the first heat exchanger (2), water vapor in the flue gas is coagulated into liquid water, and the flue gas is heated by the second heat exchanger (3). The desulfurized flue gas is cooled and dewatered by the aid of an absorption heat pump and then heated, flue gas moisture can be recovered, chimney output is improved, 'gypsum rain' and 'white smoke' discharging are relieved, and contaminant can be diffused towards high altitude.

The invention discloses a method for producing biodiesel by utilizing kitchen garbage, which comprises the following steps of: removing solid sundries out of the kitchen garbage; then adding water, pulping, regulating a pH value to be weak acidity and sterilizing; inoculating yeast cells to a kitchen garbage homogenate for liquid state fermentation, introducing gas at the temperature of 25-30 DEG C, stirring and fermenting for 70-75 hours; collecting the yeast cells after filtering a fermented liquor; crushing the yeast cells through a high-pressure homogenizer; adding the crushed cells into an extracting solvent, leaching, collecting an upper-layer organic solvent phase to obtain mixed oil, and evaporating and reclaiming the solvent in the mixed oil to obtain microbial grease; and obtaining the biodiesel through a methyl esterification reaction of the microbial grease. In the method of the invention, organic components in the kitchen garbage are converted into the microbial grease by adopting a microbial fermentation method to prepare the biodiesel, thereby solving the problem of insufficient raw material sources when the biodiesel is prepared by utilizing drainage oil, and laying a foundation for the resource utilization of the kitchen garbage and the industrialization development of the biodiesel.

The invention provides a method for preparing a high-strength high-density isotropic graphite material. According to the method, pitch mesocarbon micro bead (MCMB) powder of which the D50 is larger than 20 micrometers, and the volatile content is less than 7 percent is taken as a raw material, and the high-strength high-density isotropic graphite material is prepared by adopting the self-sintering process that the raw material powder is added into an organic solvent of pitch, the solvent is removed, the powder is pressed, a green briquette is formed through isostatic compaction, roasting and carbonization are performed, and graphitization is performed. According to the method, an organic solvent method is utilized to disperse bitumastic cement, so as to realize the modification on MCMB powder with large size and low volatile matter, the original shapes and sizes of the MCMB particles are basically kept after modification, good self sinterability is realized, and the finally obtained graphite is fine and uniform in structure, high in density and excellent in mechanical property. The pitch of the dispersed and modified MCMB is distributed uniformly, the inner stress of the green briquette in the isostatic compaction step is more uniformly distributed, and balanced expansion and shrinkage in the working procedures of roasting and graphitization are realized, and therefore, a product is not liable to crack, and the yield reaches not less than 90 percent.