74results about How to "Improve gas production effect" patented technology

The invention relates to a method and a device for preparing biomass fuel from biomass materials. The method comprises the following steps: loading biomass materials in a gas generating chamber, and carrying out pyrolysis to generate mixed gas; cracking the tar to generate a combustible gas; filtering off fly-ash and residual tar in the combustible gas; carrying out gas-water separation to separate water; and deodorizing to obtain the biomass fuel. The device comprises the gas generating chamber (2) fixed on a pedestal (1), a material storage chamber (3) fixed on the upper side of the gas generating chamber (2), a cracking catalyst absorber (4) fixed on the upper side of the material storage chamber (3), a gas-water separator (5) communicated with the cracking catalyst absorber (4), and a deodorizing and gas storage box (6) communicated with the gas-water separator (5). The device and the method have the advantages that the device and the method can effectively remove tar, fly-ash, vapor, odor, etc. in the biomass fuel without contaminating the environment and can ensure the combustion heat efficiency of the biomass fuel, etc.

The invention belongs to the technical field of environment protection and discloses a compound microbial bacterial preparation and application thereof. The compound microbial bacterial preparation consists of fermentation liquor of four bacteria, i.e. Bacillus licheniformis, Pseudomonas putida, Enterobacter cloacae and Candida valida. The compound microbial bacterial preparation provided by the invention has strong digestion power for various types of cellulose, proteins and fat macromolecules. The addition of the compound microbial bacterial preparation into excess sludge and / or kitchen waste can quicken enrichment of methanogen, shorten anaerobic digestion time and improve methane yield. Moreover, the synergetic effect of the four microbial strains is superior to the effect of any one, two or three strains of microorganisms.

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

The invention discloses a working electrolyte solution of an 800 V aluminum electrolytic capacitor. The working electrolyte solution comprises, by weight, 30%-65% of main solvent, 10%-35% of auxiliary solvent, 5%-25% of solute, 5%-15% of spark voltage improver and 1.5%-3.5% of additives. The invention further discloses a preparation method of the working electrolyte solution. The working electrolyte solution makes a 700 V-750 V superhigh voltage technical breakthrough and can directly reach the 800 V superhigh voltage technical field, and the working electrolyte solution has the advantages of being high in working voltage, long in service life, stable in performance under a high temperature environment, good in pressure resistance of products, good in gas production performance and the like.

The invention relates to application of straw decomposition and low-temperature methane production dual-function composite microbial inoculum, which is used in a rural household methane tank which takes crop straws as main raw materials or in a household methane tank which has been started in winter in the northern area and takes feces or the crop straws as main raw materials, so as to promote the fermentation of the straw raw materials and guarantee normal methane production of the methane tank under the condition of low temperature in winter. The methane production effect of the rural household methane tank which adopts the method is good; after addition of the composite microbial inoculum into the methane tank which takes the straws as the main raw materials under normal temperature, the starting time is shortened by 5 to 12 days compared with a contrast tank and the average methane production amount per day is improved by 30 to 50 percent compared with the contrast tank; and the normal use of the methane tank can still be guaranteed under the condition of the lower temperature in winter. The invention is mainly suitable for the rural household methane tank, has the advantages of quick effect, long effect, low cost, simple use method, easy popularization and so on, and can be promoted and used.

The invention discloses a formation and capacity grading method for a lithium ion battery, and the method comprises a two-stage charging step of carrying out the constant-current charging of the two-stage charging at the current of 0.2 C or below and 0.5 C or above in sequence to a 40%-65% state of charge; an aging step, wherein the aging step is not performed for 24-48 hours at the ambient temperature; and a first charge and discharge cycle step of carrying out the first charge and discharge cycle at the ambient temperature of 0.7-1.0 DEG C, and finally performing charging to a state of charge of 30%-80%. A stable SEI film further improves the infiltration performance and the conductivity, and enhances the electrolyte retention amount of the battery cell, thereby improving the cycle performance of the lithium ion battery.

The invention belongs to the technical field of the agricultural microbiology and discloses a complex bacterial preparation and application thereof. The complex bacterial preparation is prepared by mixing the following components: 1 to 3 parts of fermentation liquor of Escherichia.coli, 2 to 3 parts of fermentation liquor of Trichoderma virens, 1 to 4 parts of fermentation liquor of Pseudomonas fluorescens and 4 to 6 parts of fermentation liquor of Bacillus subtilis. The complex bacterial preparation provided by the invention not only can improve the methane yield of straws and cow dung and improve the methane generating speed, but also can further reduce content of solid waste by 30 percent. The method has the advantages of quick response, low cost, simple using method, easy popularization and the like and can be popularized and used.

The invention discloses a method for producing natural gas in an organism coal bed, comprising the following steps: a filling well is used for filling a nutrient solution or the nutrient solution and microorganism into the coal bed, simultaneously one or a plurality of circulation wells are used for extracting liquid in the coal bed and sending the liquid into the filling well, and by adjusting the filling pressure of the filling well and the extracting pressure of the circulation well, the height of water can be kept to be relatively constant, thus realizing the stable circulation of the nutrient solution; and when the contents of nutrients in water samples extracted from the circulation well all be more than 10% of the water samples in the filling well, filling and circulating are stopped, the well is closed for a while, and the atmospheric pressure of a borehole is monitored; and when the atmospheric pressure of the borehole achieves 10-20psi, the producing of gas begins. In the method, the nutrients filled in the coal bed can be mixed sufficiently by utilizing the multi-well and circulation technology, the filling quantity is reduced greatly, simultaneously, the gas production process of the microorganism can be efficiently activated and promoted, the largest-scale gas production efficiency can be realized, and the environmental pollution can be avoided.

The invention discloses plugging equipment for a ground fracturing plugging water-bearing stratum. The plugging equipment comprises a fracturing plugging feed system, a stirring system and a discharge system, wherein the fracturing plugging feed system comprises two feed pipelines; the first feed pipeline comprises a first fracturing pumper which is connected with a first liquid tank; the second feed pipeline comprises a second fracturing pumper which is connected with a second liquid tank; the stirring system comprises a stirring cabin which is arranged at a well head; stirring blades which are connected with a power device are arranged in the stirring cabin; the discharge system comprises a bushing which is positioned below the stirring cabin and is communicated with the stirring cabin;the wall of the lower part of the bushing is provided with a hole; the lower part of the bushing is positioned in a well; and the first fracturing pumper and the second fracturing pumper are communicated with the stirring cabin through a first high-pressure hose and a second high-pressure hose respectively. The plugging equipment aims to solve the problem that the water-bearing stratum is possibly communicated with a coal seam in a fracturing process because the water-bearing stratum is closer to the coal seam; and in order to guarantee that the coal seam is not communicated with the water-bearing stratum of a surrounding rock during hydraulic fracturing, the plugging equipment for the ground fracturing plugging water-bearing stratum for fracturing and reconstructing of a coal reservoir is realized.

The invention belongs to the field of preparing biological coalbed methane by microorganisms, and discloses a compound microorganism bacterium agent of the biological coalbed methane prepared by coal bed organic impurities and an application of the compound microorganism bacterium agent. The compound microorganism bacterium agent comprises fermentation broths of four bacteria namely Phanerochaetechrysosporium, Penicilliumchrysogenum, Pseudomonasecpacia and Clostridiumacetobutylium. The compound microorganism bacterium agent disclosed by the invention has strong digestive ability to various celluloses, humus and various carbon-containing macromolecules in the coal bed. A coal added with the compound microorganism bacterium agent can accelerate the enrichment of methanogenus, shorten anaerobic digestion time and improve the output of the biological coalbed methane; and in addition, the synergy effects of the four microorganism strains are superior to the effect of any one, two or three microorganisms.

The invention discloses a method for ex-situ preparation of methane and combined production of humic acid, and a composite microbial agent used in the same, belonging to the field of recycling of brown coal. The composite microbial agent is composed of fermentation broth of four bacteria, i.e., Escherichia coli, Pseudomonas putida, Penicillium decumbens and Clostridium acetobutylicum. The composite microbial agent has strong degradation capability on a variety of celluloses, hydrocarbons, asphaltene and a variety of carbonaceous macro-molecules. As coal is treated by the composite microbial agent, anaerobic digestion time can be shortened, output of methane gas is increased and extraction efficiency of humic acid is improved; moreover, the synergistic effect of the above-mentioned four microbial strains is superior to the effect of any one microbial strain or any two microbial strains.

The invention discloses a method for producing biogas by virtue of anaerobic digestion of waste oil / fat. The method comprises the steps of preparing an anaerobic fermentation strain, adding an inorganic medium and carrying out an anaerobic digestion, and comprises the following specific steps: adding anaerobically digested sludge and fat-degradable bacteria to a base culture medium as an anaerobic fermentation strain, wherein the mass ratio of the anaerobically digested sludge, fat-degradable bacteria and base culture medium is (100-300):(1-2):1000; adding an inorganic medium into the anaerobic fermentation strain at a mass ratio of (1-12):100; sequentially adding the anaerobic fermentation strain, waste oil / fat and additives at a mass percentage of 100:(1-2):(0.1-0. 15) into an anaerobic fermentation device, evenly mixing and carrying out an anaerobic fermentation to produce biogas. The activity of fat-degradation in the reaction system is increased by adding microorganisms and acclimating to form an anaerobic bacteria strain, the adhesion and contact area between the microorganism and oil / fat is increased by adding the inorganic medium, and thus the waste oil / fat is converted into biogas.

The invention relates to a method for performing quick anaerobic fermentation on chicken manure by supplying a carbon source by using straws. The fermentation method of composting the straws and then mixing the straws with the chicken manure comprises the following steps of: crushing the harvested straws by a manual or mechanical method, wherein the crushed straws are 1 to 2 centimeters in length; wetting the crushed straws according to the weight ratio of the material to the water of 1:2 with an inoculum; stirring and sealing to compost for 3 to 7 days; throwing the composted mixture of the straws and the inoculum into a fermentation tank; adding a proper amount of fresh chicken manure and adding water to prepare a mixture with the water content of about 91 to 95 percent; and performing wet type anaerobic fermentation at the temperature of 35+ / -5 DEG C under stirring to produce methane, wherein the methane is produced within 12 hours during fermentation and the fermentation time is 12 hours to 5 days. By the method, the methane yield of the chicken manure is increased; gas-producing speed is increased; acidification is performed difficultly; and straw solid content and chicken manure solid content can be further reduced. The method has the advantages of quick response, low cost, simple using method, easiness in popularization and the like and can be popularized and applied.

The invention aims at providing a method for pretreating maize straws by utilizing NH4HCO3, and an anaerobic fermentation method of maize straws. The method for pretreating maize straws by utilizing NH4HCO3 comprises the following steps: crushing maize straws and sieving with a 40-mesh sieve, adding 4%-10% ( by mass concentration) NH4HCO3 solution, evenly mixing, then performing microaerobic treatment for days at room temperature, then taking out the treated maize straws and adding water and evenly stirring, standing, filtering and drying for later use; and then performing anaerobic fermentation gas production to the obtained maize straws. The gas production of the maize straws pretreated by utilizing the method is increased by 30.6% compared with no treatment, and the removal rate of COD during the anaerobic fermentation of the pretreated maize straws is also obviously promoted.

The invention relates to a method for directional domestication inoculum suitable for anaerobic digestion of straw to produce marsh. Among them, microcrystalline cellulose is used instead of crop straw, dewatered sludge or livestock and poultry manure as domestication substrate, and an inoculum suitable for anaerobic digestion of straw to produce biogas is obtained through a domestication process of hydraulic retention time. The domestication content includes: (1) Referring to the semi-continuous operation conditions of the straw biogas demonstration project, first design the hydraulic retention time of the system, the inflow and outflow volume, and the TS% value of the system operation; (2) After the system is connected to the original bacterial source, let the inoculum adapt to the System for a few days, and then start acclimatization; (3) According to the designed system operation TS% value and the value of inflow and outflow, make a mixed solution of microcrystalline cellulose and water in a certain proportion; (4) Regular discharge and feed every day , to carry out a domestication process of one HRT; (5) Obtain the inoculum for directional domestication after the domestication is over. This technology can not only shorten the cultivation time of the inoculum, reduce the transportation cost of the inoculum, and simplify the domestication process, but also effectively improve the gas production efficiency of crop straw and shorten the start-up time of the device, which can provide a reference for straw biogas demonstration projects.

The invention discloses a carbonic acid beverage making device with a semiconductor refrigerating and juice squeezing structure. The lower portion of a cup body of the making device is connected with a refrigeration device. The upper opening part of the cup body is connected with a detachable gas making mechanism and a detachable juice squeezing device in an exchange mode. A semiconductor chilling plate is connected with an external cooling device. A gas flow chamber of the cooling device is communicated with a backflow opening. A fan connected with a gas inlet is arranged on one side of a cold conduction block in a refrigeration chamber. The juice squeezing device is composed of a drive mechanism and a juice dropping mechanism. A spiral propeller is built in a filter screen of the juice dropping mechanism. A motor shaft is connected to a rotating shaft sleeve of the spiral propeller in an inserted mode. A residue storing cavity and a juice outlet are formed in one side of an outer barrel body of the juice dropping mechanism. The steam making mechanism is formed by connecting a material storage chamber, a metering disc and a discharge disc. Raw materials in the material storage chamber flow into the cup body after being quantified through the metering disc to generate gaseous carbon dioxide, and an ice-cold carbonic acid beverage is obtained after the gaseous carbon dioxide and juice are mixed.

The invention discloses a method for increasing coal-bed gas recovery ratio by using coal-bed indigenous microbes and belongs to the technical field of microbial gas recovery. The method comprises the steps: (1) sampling a coal-bed gas well coal-bed yielded water sample, and carrying out an analysis on the variety and quantity of beneficial indigenous microbes in the obtained coal-bed yielded water sample, wherein the beneficial indigenous microbes are microbes, which produce methane, nitrogen gas and carbon dioxide through metabolism, in a coal bed; (2) determining a formula of a nutrient solution suitable for the growth of the indigenous microbes according to an analysis result on the indigenous microbes obtained in the step (1); (3) preparing the nutrient solution, and injecting the nutrient solution into a gas well. Through adding a nutritional system into the coal bed, beneficial indigenous microflora in the coal bed are activated, and the yield of coal-bed gas is increased by using gases such as methane, nitrogen gas and carbon dioxide and organic acids generated through the underground fermentation of the indigenous microflora. According to the method, bacterial solutions are not required to be prepared, the process is simple, the operation is easy, and the method is safe and environment-friendly.

The invention provides a method using chrysanthemum morifolium ramat wastes to produce biogas and solves the technical problems that chrysanthemum morifolium ramat wastes are wasted and cause environment pollution, and the like in the prior art. The method includes the steps of a, collecting the chrysanthemum morifolium ramat wastes, using a collecting device to collect the roots, stems and leaves of chrysanthemum morifolium ramat, and removing sundries such as mud and weeds; b, manufacturing a biogas fermentation device; c, loading materials needed by fermentation; adding the chrysanthemum morifolium ramat wastes into an upper cavity, and adding decomposition agent and nitrogen; performing acidification and decomposition on the chrysanthemum morifolium ramat wastes through the decomposition agent to form acidified liquid, allowing the acidified liquid to flow into the lower cavity of a shell through a filter hole in a partition, using a conveying pump to convey the acidified liquid into the sealed tank, and performing anaerobic fermentation to produce the biogas in the sealed tank. The method has the advantages that the chrysanthemum morifolium ramat wastes can be turned into the biogas, pollution is reduced, and economic benefits are increased.

The invention relates to a high-concentration organic wastewater and organic solid waste treatment process and a high-concentration organic wastewater and organic solid waste treatment system. The device comprises a high-pressure hydrothermal reaction kettle (1), wherein a pressure container (1-2) is arranged in the hydrothermal reaction kettle (1) and connected with a solid-liquid separator (2),the solid outlet end of the solid-liquid separator (2) is connected with a dryer (3) and a compression molding machine (4), the liquid outlet end of the solid-liquid separator (2) is communicated witha liquid storage tank (6), the liquid storage tank (6) is connected with a gasification reactor (7) through an air circulating pump (5), and the gasification reactor (7) is connected with a gas storage tank (9) through a condenser (8). According to the invention, high-concentration organic wastewater and organic solid waste are converted into coke forming fuel with high additional value and high-quality hydrogen-rich combustible gas, so that the hydrothermal liquid phase and the high-concentration organic wastewater are cleanly recycled, and the content of H2 in the organic solid waste gasification produced gas is increased so as to achieve the high-value utilization of the high-concentration organic wastewater and the organic solid waste.

The invention belongs to the technical field of lithium ion batteries, and discloses a single crystal ternary positive electrode material and a preparation method and application thereof, the chemical formula of the single crystal ternary positive electrode material is LiNixCoyMnzM (1-x-y-z) Oc (at) LiaNdOb, 0 < x < = 0.65, 0 < y < = 0.15, 0 < z < = 0.35, 0 < a < = 6, 0 < b < = 4, 1 < c < = 2, and 1 < = d < 2; m and N are at least one of Zr, Ni, Al, Cu, Co, Sr, Mn, Y, Ti, Mg, Mo, B, Sn, Fe, Zn, Si or W. The single-crystal ternary positive electrode material disclosed by the invention is a single-crystal material with a core-shell structure, and is low in surface residual lithium, stable in internal and external structures, high in energy density and excellent in cycle performance and dynamic performance.

The invention provides a gas generator ignition agent and a preparation method thereof, and a gas generator for a vehicle safety airbag. The gas generator ignition agent contains a fuel, an oxidant, abinder and an additive, wherein the additive is an oxazole-based energy-containing ionic compound. According to the present invention, by adding 5-aminotetrazole nitrate to a boron / potassium nitrateignition agent, on the basis of the ensuring of the combustion heat and the combustion temperature of the agent, the high-temperature and high-pressure gas amount can be increased, the output pressureof the ignition agent can be increased, and the output performance of the ignition pipe can be increased, such that the pressure starting time of the gas generator is advanced to less than 2 ms, andthe pressure value at 10 ms is increased by about 20 Kpa so as to improve the gas generating performance of the gas generator.

The invention belongs to the field of biological environmental protection, and discloses a compound microbial agent for aerobic treatment on food processing wastewater and an application of the compound microbial agent. The compound microbial agent is composed of fermentation broth of lactobacillus casei, candida tropicalis and bacillus licheniformis. With the compound microbial agent, various organic matters causing increase of COD and BOD of food wastewater can be effectively degraded and removed under the aerobic condition. When added for the debugging purpose in the aerobic treatment technology of food wastewater, the microbial agent can accelerate enrichment of microbes during aerobic treatment, and shorten the debugging time; when added for the enhancing purpose in the aerobic treatment technology of food wastewater, the effluent quality of the aerobic treatment technology can be improved; and the synergy of the three microbial strains is better than the effect of any one or two microbial strains.

The invention discloses a carbon dioxide drink cup comprising a cup body and a gas generation mechanism; a hopper material chamber and a metering plate in an upper cavity of the gas generation mechanism and a discharge plate in a lower cavity are connected in sequence through a core shaft; an annular spring is arranged between the metering plate and the discharge plate; an ingredient input port on the bottom of the material chamber and a dosing hole of the metering plate are on a same axial line; the metering plate is twisted by outer force, and a rotary axial line of the dosing hole is overlapped with an axial line of a discharge hole of the discharge plate; the discharge plate is provided with a slide slot extending into the discharge hole; the slide slot in the discharge hole is provided with a seal ring; a seal flashboard in the slide slot is always sealed in the discharge hole under the spring effect. The cup can fast make carbon dioxide drinks, is convenient in operation, safe and healthy, and can realize instant preparation for drinking.

The invention relates to a formula and a method for improving gas producing and holding capacity of raw frozen steamed bread and belongs to the technical field of food processing. A 0.6% yeast and an 0.8% compound additive are added to flour; the compound additive comprises a leavening agent, an antioxidant, an emulsifier and a thickening agent. The 0.6% yeast and the 0.8% compound additive are mixed and added to the flour, water is added, the mixture is stirred in a dough mixer at the medium speed until dough is completely expanded, and the mixture is left to stand, formed, quick-frozen at the temperature of subzero 34 DEG C and then freeze-stored at the temperature of subzero 18 DEG C. The method is simple in technology, the gas producing and holding capacity of the dough is improved obviously, the method is particularly applicable to a frozen dough system, the development of steamed bread is quick-frozen steamed bread in the future, and development of the steamed bread production towards industrialization and mechanization is made possible with the method.

The invention belongs to the technical field of biomass energy, and particularly relates to a method for improving biogas production performance of anaerobic fermentation of wheat straw through low-temperature freeze-thaw pretreatment. The method comprises the following steps: airing straw, and performing crushing and drying; adding water into the dried wheat straw, adjusting the mass ratio of solid to liquid to be 1: (8-10), and soaking the mixture obtained after full mixing at room temperature for 6-10 hours; freezing the mixture for 12-96 hours at the temperature of -80 to-10 DEG C, and then naturally performing unfreezing; filtering out the wheat straw, and performing drying to obtain pretreated wheat straw; adding the pretreated wheat straw and inoculum into a fermentation tank for anaerobic fermentation, and finishing the whole fermentation period when gas production is stopped. According to the method, the biogas is prepared from the wheat straw, so that resource utilization ofthe wheat straw is realized; the straw is subjected to freeze-thaw pretreatment, the freeze-thaw pretreatment technology mainly enables the straw structure to become loose and porous, and the gas production efficiency is improved; the method is safe and non-toxic, and does not pollute the environment.

The invention belongs to the technical field of environment protection and discloses a compound microbial bacterial preparation and application thereof. The compound microbial bacterial preparation consists of fermentation liquor of four bacteria, i.e. Bacillus licheniformis, Pseudomonas putida, Enterobacter cloacae and Candida valida. The compound microbial bacterial preparation provided by the invention has strong digestion power for various types of cellulose, proteins and fat macromolecules. The addition of the compound microbial bacterial preparation into excess sludge and / or kitchen waste can quicken enrichment of methanogen, shorten anaerobic digestion time and improve methane yield. Moreover, the synergetic effect of the four microbial strains is superior to the effect of any one, two or three strains of microorganisms.

The invention discloses an exhaust hood for a biomass energy converter. The exhaust hood for the biomass energy converter comprises a hood body (1) in which a cavity is formed, and is characterized in that: a plurality of grooves (3) are distributed at the periphery of an outer surface of the hood body (1); and exhaust holes (5) are reserved on side walls (4) of the grooves (3) and are communicated with the cavity in the hood body (1). The exhaust holes are reserved on the side walls of the grooves formed on the outer surface of the hood body, so wind enters a combustion chamber in a centrifugal radiation shape to form rotary wind, and a combustible material in the combustion chamber can be combusted sufficiently; the opening direction of the exhaust holes is changed to the horizontal direction from the conventional vertical direction, so the blockage due to dust is avoided; and through the structure, the gas generation performance is greatly improved.

Provided is a thermosetting composition capable of forming a protective film excellent in flatness, heat resistance, chemical resistance, adhesion, hardness, electrical reliability and transparency, acured film and a display device. The thermosetting composition comprises an epoxy compound (A) having an average value of m of from 0 to 1 and represented by the following general formula (1), a liquid epoxy compound (B) being liquid at room temperature, an epoxy compound (C) that has a weight-average molecular weight of 900 to 20000 other than (A) or (B) and an epoxy equivalent of 150~500g / eq, acuring agent (D) selected from the group consisting of polybasic carboxylic acid, anhydride thereof, thermally decomposable ester of the polybasic carboxylic acid, and a curing accelerant. (In the formula (1), Ar represents a divalent aromatic hydrocarbon group having 6 to 12 carbon atoms, a part of the hydrogen atoms of the divalent aromatic hydrocarbon group may be substituted with a hydrocarbon group having 1 to 10 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or a halogen group.

The invention discloses a method for producing biogas by virtue of anaerobic digestion of waste oil / fat. The method comprises the steps of preparing an anaerobic fermentation strain, adding an inorganic medium and carrying out an anaerobic digestion, and comprises the following specific steps: adding anaerobically digested sludge and fat-degradable bacteria to a base culture medium as an anaerobic fermentation strain, wherein the mass ratio of the anaerobically digested sludge, fat-degradable bacteria and base culture medium is (100-300):(1-2):1000; adding an inorganic medium into the anaerobic fermentation strain at a mass ratio of (1-12):100; sequentially adding the anaerobic fermentation strain, waste oil / fat and additives at a mass percentage of 100:(1-2):(0.1-0. 15) into an anaerobic fermentation device, evenly mixing and carrying out an anaerobic fermentation to produce biogas. The activity of fat-degradation in the reaction system is increased by adding microorganisms and acclimating to form an anaerobic bacteria strain, the adhesion and contact area between the microorganism and oil / fat is increased by adding the inorganic medium, and thus the waste oil / fat is converted into biogas.