357 results about "Methane production" patented technology

The invention provides a coal bed gas productivity prediction method and system combined with artificial intelligence, and the method comprises the steps: firstly obtaining a multi-source coal bed gas productivity data set, which comprises geological structure data, reservoir physical property data and historical production dynamic data, of a target block, and then carrying out the time-space alignment processing of the multi-source coal bed gas productivity data set, the method comprises the following steps: obtaining a standardized coal bed gas productivity characteristic set, then performing characteristic extraction on the standardized coal bed gas productivity characteristic set to generate a prediction characteristic set containing geological attribute characteristic and dynamic attribute characteristic dual codes, and then performing iterative prediction on the prediction characteristic set based on a reinforcement learning strategy network. Finally, an optimization strategy set is generated according to the target coalbed methane productivity prediction result and error distribution of historical production dynamic data and fed back to a coalbed methane production control system to trigger parameter adjustment operation, and therefore the accuracy of coalbed methane productivity prediction can be improved, and optimization control over the production process is achieved.

The invention provides a multi-target collaborative optimization scheduling method for a hydrogen-containing comprehensive energy system, and the method comprises the steps: building a hydrogen energy diversified utilization model containing electrolytic hydrogen production, hydrogen-to-methane production, hydrogen-to-electricity conversion, carbon capture, hydrogen storage and thermoelectric hydrogen doping, and fully absorbing surplus wind power new energy; on the basis, economy and low-carbon property are taken into consideration, a hydrogen-containing comprehensive energy system multi-target optimization scheduling model with minimum total operation cost and minimum carbon emission as targets is established, the model is solved in combination with an epsilon-constraint method and a TOPSIS decision-making method, and quantity-quality cooperative operation of the comprehensive energy system is promoted. Under the condition that the hydrogen doping ratio of fuel gas is fixed, the total cost and the carbon emission amount are reduced along with the increase of the hydrogen doping ratio of the CHP unit, and when the hydrogen doping ratio reaches up to 20%, the economic benefit and the environmental benefit of the IES are the best. Compared with a traditional IES optimization scheduling problem, multi-objective optimization can better promote quantity-quality cooperative operation of the IES, the overall performance of the comprehensive energy system is improved, and the method can be widely applied and popularized.

The invention relates to the field of sludge circulation treatment, in particular to a sludge circulation treatment method capable of reducing pollution and carbon. The sludge circulation treatment method capable of reducing pollution and carbon comprises the following treatment steps: S1, sludge disintegration: selecting a sludge sample in sewage, and screening out dominant bacteria and reproduction conditions; s2, anaerobic digestion treatment: adding the screened strains into a sludge anaerobic digestion device for anaerobic digestion treatment; s3, sewage treatment: conveying the sewage subjected to anaerobic digestion treatment into a sewage treatment device, and selecting organic matters dissolved out of sludge in the step of anaerobic digestion treatment as a denitrification carbon source for biological treatment. According to the present invention, the sludge digestion innovative process is adopted, the original anaerobic reaction process in the sewage process is utilized, the decomposition and acidification effects on the biochemical excess sludge are enhanced, the methanogenesis reaction is inhibited through the internal ammonia nitrogen, the dissolution acid production efficiency is improved, the reaction time is shortened, and the on-site resource utilization of the sludge is achieved.

The invention provides a high-crystallinity modified iron oxide as well as a preparation method and application thereof, and relates to the technical field of organic solid waste treatment. The preparation method comprises the following steps: preparing a precursor MIL-88B by utilizing a hydrothermal method; the precursor MIL-88B is subjected to calcination treatment, and an iron oxide with the MIL-88B as the precursor is obtained; the temperature condition of the calcination treatment is 550-850 DEG C. The high-crystallinity modified iron oxide prepared by the preparation method improves methane production efficiency and stability, avoids competition of iron reducing bacteria, is stable in long-term operation and low in cost, and has both environmental and economic benefits.

The invention relates to a shale or coal rock gas evaluation method based on a gas-water two-phase flow isotope fractionation model. The shale or coal rock gas evaluation method comprises the following steps: 1, collecting data; 2, establishing a gas well model; 3, establishing a control equation set; 4, coupling the influence of the real gas effect and the effective stress; 5, establishing a gas transmission model and a relative permeability model; 6, establishing a relation between capillary pressure and saturation; 7, considering critical desorption pressure; 8, setting boundary conditions of initial conditions; 9, solving a control equation set; 10, calculating production dynamic parameters and isotope values; 11, performing history fitting; 12, verifying historical fitting quality; 13, predicting productivity; 14, calculating a gas dynamic output proportion; 15, identifying a fractionation inflection point and gas production mechanism conversion; by coupling gas-water two-phase flow, multiple gas transmission mechanisms, stress sensitivity and methane isotope competitive adsorption theories, yield prediction of the deep reservoir and quantitative evaluation of the dynamic proportion of produced gas are realized.

The invention discloses an anaerobic fermentation tank for livestock and poultry breeding mixed liquid dung, and belongs to the technical field of livestock and poultry waste treatment and utilization. The device is structurally provided with a steel tank body, a water inlet, an exhaust port, a water outlet, a heat exchange pipe, a slag discharge port and a pressure gauge. The water inlet, the exhaust port, the drainage port and the pressure indicator are arranged at the upper end of the tank body; the deslagging port and the heat exchange pipe are arranged at the lower end of the tank body; the interior of the tank body is divided into a plurality of independent cabins by isolation baffles, and the adjacent cabins are sequentially connected in series through cabin flow guiding openings and cabin slag discharging openings. Each cabin is divided into a plurality of small chambers by flow guide plates, and the adjacent small chambers are sequentially connected in series through small chamber exhaust holes and small chamber slag discharge holes. The heat exchange pipe is arranged at the bottom upper part of the tank body and annularly penetrates through the cabins; and the slag discharge port is arranged at the bottom of the serial tail cabin. According to the invention, the energy-consumption-free repeated settling separation of suspended matters in the liquid dung is fully realized, the solid / liquid separation efficiency of the liquid dung is improved, the methane content in unit liquid dung is high, the concentration of suspended matters in biogas slurry is low, the biogas residue is less, the problems of surface crusting, pipeline blockage and the like are avoided during long-term operation of equipment, and the operation and maintenance cost is low.

The invention relates to a sea surface methane concentration inversion prediction method and system based on a time sequence neural network, and relates to the technical field of marine environment monitoring processing, and the method comprises the steps: taking obtained water color remote sensing data and environmental parameters as references, and performing inversion analysis on optical parameters and diffusion attenuation coefficients; and further inverting a key driving quantity reflecting a main physical process of the change of methane on the sea surface, extracting time sequence characteristics with physical significance, inputting the time sequence characteristics into a time sequence neural network model group to invert a methane concentration value, and predicting a methane concentration value in a certain time period. Therefore, starting from the processes of sea surface methane production and sea surface methane concentration change, the influence of factors such as optical characteristics, environmental parameters and various driving quantities on sea surface methane production and emission is deeply studied, on one hand, the sea surface methane concentration value with the known target time is accurately inverted, and on the other hand, the sea surface methane concentration value with the known target time is accurately inverted. The methane concentration value in a future time period can be predicted, and the monitoring efficiency and applicability are improved.

The present invention provides a method for anaerobic digestion of sludge to produce methane based on direct interspecies electron transfer. A conductive material is added to the sludge, and an anaerobic digestion reaction is carried out under stirring; the conductive material is an SC / FeS composite material. In the present invention, the SC / FeS composite material is added to the sludge as the conductive material. Due to the good biocompatibility, fast mass transfer ability and electron transfer ability of SC; as well as the FeS particles with good conductivity, the anaerobic digestion efficiency of microorganisms can be improved, the resource utilization of wastewater treatment can be realized, and the methane production can be increased by 1.2 - 3.75 times.

The present invention discloses a method for improving the methane production and purity in the anaerobic fermentation of straw-like raw materials, which comprises the following steps: S1. Pretreatment; S2. Inoculating the pretreated initial liquid material with hydrogen-producing and acid-producing microorganisms, and carrying out anaerobic fermentation by means of magnetic field strengthening and external circulation; S31. Collecting the fermentation gas in step S2, preparing nano-bubble water, then adding the pretreated initial liquid material, inoculating hydrogenophilic methanogenic microorganisms, and carrying out anaerobic fermentation to produce methane; S32. Collecting the fermentation liquid in step S2, inoculating acetic acidophilic methanogenic microorganisms, and carrying out anaerobic fermentation to produce methane by means of magnetic field strengthening and external circulation. This application separately uses acid-producing substrates and hydrogen to separate the methanogenesis stage into two independent pathways of acidophilic methanogenesis and hydrogenophilic methanogenesis. Combining magnetic field strengthening and nano-bubble technology, it improves the organic matter degradation effect, hydrogen-producing and acid-producing effect, as well as the utilization efficiency of hydrogen and acid-producing substrates, increases the methane production and purity, and shortens the entire fermentation cycle.

The invention discloses a continuous kettle type nitromethane production process, and relates to the technical field of basic chemical raw material synthesis and flow chemical reaction process control, which comprises the following steps: quantitatively and continuously pumping a temperature-regulated sodium nitrite mixed solution into a raw material mixer in a closed-loop automatic control mode through a variable-frequency feeding pump matched with a mass flow meter; synchronously, quantitatively and continuously pumping dimethyl sulfate into the raw material mixer in a closed-loop automatic control manner by matching a feeding pump with a stop valve and a mass flow meter, and uniformly mixing the two raw materials in the raw material mixer according to the stoichiometric molar ratio of the dimethyl sulfate to the sodium nitrite, according to the tandem type segmented design, each reaction kettle can be subjected to customized temperature field control and heat transfer design specially aiming at the special thermodynamic and dynamic requirements of the reaction stage where the reaction kettle is located, the heat transfer efficiency of the whole system is greatly improved, and due to the fact that reaction heat is taken away timely and accurately, the heat transfer efficiency is greatly improved. And a by-product generation path induced by local abnormal high temperature is effectively restrained.

To provide: a methane production device and a methane production method which, in production of methane gas by bio-methanation, enable supply of the methane gas at a proper concentration required on a use place where the methane gas is used; and a power generation system utilizing the methane production device.SOLUTION: A methane production method according to the present invention, which is for performing methane production based on bio-methanation, includes: a reaction step of performing a methanation reaction with hydrogen gas and biogas being supplied; and a control step of controlling the efficiency of the methanation reaction to obtain methane gas having any methane concentration. According to the methane production method, the methane gas can be supplied at a proper concentration adapted to a use place of the methane gas. A power generation system according to the present invention utilizes the methane gas obtained from a methane production device according to the present invention. The power generation system enables the methane production device to have a high efficiency without replacing an existing gas power generator.SELECTED DRAWING: Figure 1

The invention relates to a method for inhibiting rumen gas production by using a genetically modified laver filament as a ruminant feed additive and a method for inhibiting methane production by using the genetically modified laver filament as the ruminant feed additive. A porphyra yezoensis bromine peroxidase gene is cloned, an overexpression vector of the gene is constructed, porphyra yezoensis thallus is used as a receptor for genetic transformation, and a porphyra algal strain of which the key enzyme expression quantity is remarkably improved is obtained through screening. The method comprises the following steps: inducing thalli to generate protonema, crushing the protonema by using a crusher, carrying out ventilated large-scale culture in a seawater culture medium added with PES by using a column bioreactor to obtain a large number of protonema materials, collecting the protonema materials, crushing the protonema materials by using the crusher, and drying at low temperature. The obtained laver protonema powder is put into a vacuum bag for low-temperature preservation in dark light, and can be applied to preparation of ruminant feed as a dairy cow feed additive. The filamentous can accumulate halogenated compounds such as bromidogen and the like, can inhibit the activity of a key enzyme generated by methane in rumen, and further inhibits the generation of methane.

The invention discloses an electric methane preparation catalyst compounded by Ni nanoclusters and ZrO2 with lattice embedded with Ru single atoms as well as a preparation method and application of the electric methane preparation catalyst. The electric methane preparation catalyst comprises a NiNCRuSA / ZrO2 bimetallic active site catalyst compounded by the Ni nanoclusters and the ZrO2 with the lattice embedded with the Ru single atoms. The electric methane preparation catalyst comprises a NiNCRuSA / ZrO2 bimetallic active site catalyst, the NiNCRuSA / ZrO2 bimetallic active site catalyst is of a ZrO2 composite structure formed by embedding Ru monatomic into Ni nanoclusters and crystal lattices, the Ni nanoclusters and the Ru monatomic are adjacently distributed on a ZrO carrier to form a synergistic catalysis structure, rich and efficient active sites are provided for catalytic reaction, and reactant adsorption and conversion are facilitated; in the subsequent CO2 methanation reaction, the Ni element quickly dissociates H2 and provides sufficient H *, Ru replaces ZrO2 to serve as an active site for CO2 adsorption and conversion, conversion of an intermediate of CO2 can be accelerated, the reaction activity is greatly enhanced through cooperation of the Ni element and the Ru, the reaction energy barrier is reduced, and the overall catalytic efficiency is improved.

The invention discloses a method for improving methane production through low-temperature anaerobic digestion of sewage sludge, and relates to the technical field of solid waste resource utilization and renewable energy sources. The invention aims to solve the problem of low methane yield in the anaerobic digestion process of sewage sludge under a low-temperature condition. The method comprises the following steps: adding an inoculum and a culture medium into a reaction device, and fully stirring and mixing to obtain a mixed matrix; the inoculum is anaerobic digestion sludge, and the culture medium is sewage sludge which is subjected to heat treatment at 90-100 DEG C for 0.5-1 hour; and adding the biochar into the mixed matrix, and carrying out low-temperature anaerobic digestion to complete the improvement of the low-temperature anaerobic digestion methane production of the sewage sludge. The method for improving methane production through low-temperature anaerobic digestion of sewage sludge can be obtained.

The invention discloses a sludge treatment process for a sewage treatment plant. The invention belongs to the technical field of civil engineering sludge treatment, and realizes double breakthrough of environmental benefits and economic benefits through multi-stage cooperation and resource closed-loop design. The organic matter decomposition efficiency is remarkably improved through the synergistic effect of the biochar-loaded nano material, electron transfer in the anaerobic digestion process is accelerated through the unique conductive network structure of the biochar-loaded nano material, the methane generation rate breaks through the bottleneck of a traditional technology, and biochar serves as a core medium to directly participate in building of a building body; the porous characteristic and the adsorption performance of the filter material are integrated into a filter interlayer and an ecological slope protection of a hydraulic structure to replace a traditional sand filter material and a concrete additive, so that the construction process is simplified, and the structural functionality is enhanced. Process equipment and a building space adopt a collaborative design principle, and a guide wall of an anaerobic reactor and a refractory lining of a pyrolyzing furnace are integrally poured in combination with the characteristics of a charcoal-based material, so that the matching precision of an equipment foundation and a main body structure is greatly improved.

The present invention relates to compositions and methods for reducing methane production in a ruminant population.

The invention relates to the technical field of methane preparation, and discloses a methane preparation system based on carbon dioxide capture coupling electrolytic hydrogen production. According to the system, a trapping module is used for separating and purifying carbon dioxide from industrial waste gas through a pressure swing adsorption technology; the electrolysis module utilizes a proton exchange membrane electrolytic bath to decompose deionized water to generate high-purity hydrogen; the proportioning module is used for accurately mixing carbon dioxide and hydrogen according to the stoichiometric ratio of 1: 4 to form reaction raw materials; the catalysis module performs a Sabatier reaction under the action of a nickel-based catalyst to convert carbon dioxide and hydrogen into methane; the condensation module separates water vapor through cooling condensation to obtain a purified methane product. The technical problems of low system integration level and unstable conversion efficiency caused by lack of accurate control algorithms in the processes of carbon dioxide capture, electrolytic hydrogen production, gas proportioning, catalytic methanation and product separation in the prior art are solved.

The invention discloses a method and a device for monitoring the stability of an anaerobic digestion system in real time. The method comprises the following steps: 1, carrying out non-targeted metabonomics analysis on the anaerobic digestion mVOCs category by adopting headspace solid-phase microextraction in combination with gas chromatography-high resolution mass spectrometry; 2, screening differential mVOCs markers based on principal component analysis and orthogonal partial least squares discriminant analysis; and 3, constructing a system stability real-time monitoring system by using an electronic nose sensor array, and when the difference mVOCs marker concentration deviates from a threshold value or difference categories are continuously accumulated, triggering early warning and recommending an optimization strategy by the system. The method and the device can monitor the state of the anaerobic reactor in real time, early warn the methane production inhibition risk in advance compared with traditional parameters (pH, volatile fatty acid and the like), improve the biogas yield and reduce the operation and maintenance cost, are suitable for intelligent management of anaerobic digestion scenes of kitchen garbage, municipal sludge, agricultural waste and the like, and can also be expanded to other anaerobic biological fermentation fields.

The invention discloses a method for calculating migration of methane in a shale gas reservoir matrix-fracture system under microwave radiation. The method specifically comprises the following steps: collecting physical and mechanical parameters of a shale gas reservoir matrix and engineering parameters of the shale gas reservoir matrix and fracture system; according to the engineering parameters, establishing a geometric model for simulating the shale gas reservoir, and taking the whole geometric model as a computational domain; a mutual coupling relation is established for the computational domains, and then a coupling model covering crack deformation is formed; initial conditions and boundaries are distributed, the separation coupling model is solved, then a dynamic change curve of the content of the methane gas in the matrix and fracture system under microwave radiation is obtained, and the migration track of the methane is obtained. The model integrates the interaction among the electromagnetic effect, solid deformation, fluid and moisture transportation and heat transfer, can effectively evaluate the change of various reservoir parameters under microwave radiation, and can accurately track the dynamic change process of the methane exploitation content in the shale gas reservoir.

The invention relates to the technical field of anaerobic methanogenesis, and provides a polyurethane foam filler as well as a preparation method and application thereof. The polyurethane foam filler comprises a polyurethane foam body and auxiliaries dispersed in the polyurethane foam body, and the auxiliaries comprise nano zero-valent iron, molybdate and a conductive carbon material. According to the polyurethane foam filler provided by the invention, through the synergistic effects of filler surface hydrophilicity, reducing atmosphere, inhibition on sulfate reduction reaction, promotion on interspecific electron transfer and the like, the starting of an anaerobic methanogenesis process can be accelerated, the impact resistance is enhanced, the efficiency of the anaerobic methanogenesis process and the reaction operation stability are effectively improved, and the service life of the polyurethane foam filler is prolonged. And the method has wide practical value and application prospect.

The invention belongs to the technical field of sludge treatment and recycling, and relates to a method for promoting anaerobic methane production by sludge through tubular pore structure biochar. Comprising the following steps: screening, washing, segmenting and drying a biomass material with a natural grade pore network, and then pyrolyzing and screening to obtain tubular pore structure biochar; carrying out sedimentation, sieving, dilution and pyrohydrolysis on the residual sludge to obtain pretreated sludge; mixing the pretreated sludge with the inoculated sludge to obtain mixed sludge; and adding the tubular pore structure biochar and the mixed sludge into an anaerobic reactor, aerating nitrogen in the anaerobic reactor, sealing the anaerobic reactor in a water bath constant-temperature oscillator, and carrying out methane production until no methane is generated in the anaerobic reactor. According to the method, the anaerobic methanogenesis efficiency of the residual sludge is remarkably improved by utilizing the tubular pore structure biochar, and the improvement of the anaerobic methanogenesis efficiency of the sludge under the mediation of the exogenous conductive material is realized.

A process for producing methane is specified. According to one embodiment, the process comprises a first reaction stage (S1) comprising calcining a metal bicarbonate in a first reaction volume (1) to form carbon dioxide and reacting the carbon dioxide with hydrogen gas in a second reaction volume (2) to form gaseous products (3), wherein one of the gaseous products (3) is methane and wherein thermal energy released during the reaction of the carbon dioxide is used to calcine the metal bicarbonate.

The application provides a method for producing biogas by anaerobic fermentation of pea protein wastewater, and relates to the technical field of biomass energy utilization, wherein the chemical oxygen demand is 10000-15000 mg / L, the ammonia nitrogen is 400-800 mg / L, and the sulfate radical is 600-1000 mg / L; the method comprises the following steps: (1) gradient micro-oxygen hydrolysis acidification pretreatment; (2) physical-chemical and biochemical synergistic intensified pretreatment; and (3) anaerobic methane production. The method for producing biogas by anaerobic fermentation of pea protein wastewater is capable of effectively inhibiting sulfate reducing bacteria, reducing hydrogen sulfide generation, reducing free ammonia toxicity and accelerating hydrolysis of macromolecular organic matter through gradient micro-oxygen hydrolysis acidification. In combination with modified tourmaline ceramic and magnetization synergistic treatment, the microbial activity and mass transfer efficiency are further improved. The whole process can be stably operated, the COD removal rate, the biogas yield and the methane content are significantly improved, and the harmless treatment of the pea protein wastewater and the resource utilization of the biogas are efficiently realized.

The invention relates to the technical field of wastewater resourceful treatment, in particular to a magnetic field reinforced anaerobic reactor and a wastewater resourceful treatment method. The magnetic field intensified anaerobic reactor comprises an anaerobic reactor body and a plurality of magnetic blocks fixed on the outer surface of the anaerobic reactor body, the plurality of magnetic blocks are divided into a plurality of rows and surround the outer surface of the anaerobic reactor body, and the magnetic blocks in each row are circularly arranged in the sequence of left, upper, right and lower according to the magnetic field direction. The magnetic field enhanced anaerobic reactor can utilize the magnetic field to convert the ascending or descending motion of microorganisms in the reactor depending on water flow, bubbles or self into magnetic induction line cutting motion, convert kinetic energy into electric potential energy and enhance electron transfer between acetogens and methanogens; the utilization degree of organic matters in the wastewater by the acid-producing bacteria and the methane-producing process of reducing carbon dioxide by utilizing electrons by the methane-producing bacteria are improved, and the energy utilization and methane-producing efficiency in the anaerobic reactor are improved.

The present invention relates to an apparatus for producing biomethane and a method for producing biomethane from waste using same. The apparatus for producing biomethane, which corresponds to one aspect of the present invention, is directed to a technique for producing biomethane from wastewater to be discarded and is environmentally friendly and economical. In addition, the apparatus for producing biomethane of the present invention utilizes carbon materials, such as carbon dioxide, present in the atmosphere and thus can contribute to carbon neutrality. In addition, the apparatus for producing biomethane of the present invention separately performs a liquid fermentation process, thereby exhibiting excellent biomethane production efficiency.

The present disclosure provides a dosage form or a bolus configured for administration to a ruminant, comprising: (i) a core comprising a haloform adsorbed to a high surface area material or porous sorbent, and (ii) a housing which encapsulates the core and prevents direct release of the core into a rumen of the ruminant. The present disclosure also provides a system for inhibiting methane production in a ruminant, and a method of inhibiting methane production in a ruminant.

To provide a methane production method in which a conversion ratio of carbon dioxide into methane is high.SOLUTION: There is provided a methane production method configured to: supply a raw material gas having a molar ratio (H2 / CO2) of carbon dioxide and hydrogen of 7-12, into a reaction vessel in which a temperature is set to 310-390°C; bring the raw material gas into contact with a catalyst which activates a methanation reaction for producing methane.SELECTED DRAWING: None

The invention discloses an anaerobic bacterial agent and a method for improving the anaerobic methane production rate of medium-temperature and medium-temperature cellulose. The compound anaerobic microorganism liquid bacterial agent is prepared from clostridium termite, thermophilic anaerobe of ethanol, clostridium swardii and methanosarcina barkeri, and the compound anaerobic microorganism liquid bacterial agent is prepared from the following raw materials: clostridium termite, thermophilic anaerobe of ethanol, clostridium swardii and methanosarcina barkeri, and the compound anaerobic microorganism liquid bacterial agent is prepared from the following raw materials: the compound anaerobic microorganism liquid bacterial agent, the compound anaerobic microorganism liquid bacterial agent, the compound anaerobic microorganism liquid bacterial agent and the compound anaerobic microorganism liquid bacterial agent, the compound anaerobic microorganism liquid bacterial agent, the compound anaerobic microorganism liquid bacterial agent and the compound anaerobic microorganism liquid bacterial agent, and the compound anaerobic microorganism liquid bacterial agent is prepared from the compound anaerobic microorganism liquid bacterial agent and the compound anaerobic microorganism liquid bacterial agent. The microbial inoculum is formed by compounding four strains of synergistic bacteria, the culture process is simple and easy to implement, and when the microbial inoculum is applied to medium-temperature and medium-temperature anaerobic digestion, the conversion rate of cellulose to methane (greater than 40%) and the yield of methane (greater than 120%) can be remarkably improved.

The invention relates to the technical field of integrated energy system dispatching, in particular to an integrated energy system low-carbon dispatching method considering fuel gas hydrogen mixing and carbon transaction, which comprises the following steps of: constructing an integrated energy system model containing electric power, thermal power, natural gas and coupling equipment, and defining an electric hydrogen production process and an electric methane production process of power-to-gas equipment by the coupling equipment model; a fuel gas mixed hydrogen energy flow calculation model is constructed, a decomposition solution method is adopted for iterative convergence and dynamic calculation of a mixed fuel gas real-time heat value, and energy balance constraints are improved; constructing an optimal scheduling model considering the stepped carbon transaction, and taking the minimization of the total operation cost as a target; and applying hydrogen mixing proportion upper limit constraint, and cooperatively deciding power distribution and a hydrogen storage tank charging and discharging strategy through an optimization algorithm to solve a target function. According to the method, the energy flow calculation precision and the renewable energy consumption capability are improved, and collaborative optimization of system economy and environmental protection benefits is realized.

The invention discloses a pharmaceutical composition for reducing methane emission of ruminants and improving feed digestibility and a preparation method of the pharmaceutical composition, and belongs to the technical field of feed additives. Comprising the following components in parts by weight: 35-45 parts of malt, 30-40 parts of mangnolia officinalis and 25-35 parts of rhizoma atractylodis. During preparation, the malt, the mangnolia officinalis and the rhizoma atractylodis are respectively crushed and sieved, and then the crushed malt, the crushed mangnolia officinalis and the crushed rhizoma atractylodis are fully mixed to obtain the pharmaceutical composition. On one hand, the antibacterial characteristics of the cortex magnoliae officinalis and the rhizoma atractylodis can remodel gastrointestinal tract microflora, the activity of microorganisms closely related to methane generation such as methanogens is accurately inhibited, and methane emission is reduced from the source; and on the other hand, digestive enzymes of malt directly act on feed nutrition decomposition, and magnolia officinalis and rhizoma atractylodis jointly construct an efficient digestion system by maintaining intestinal health and optimizing a digestion environment, so that the feed digestibility is remarkably improved, and growth, development and production performance improvement of ruminants are promoted.