186 results about "Methane emissions" patented technology

Provided herein, inter alia, are ruminant feed or feed additive compositions, and methods of using these feed or feed additive compositions to reduce methane emissions in ruminants while improving animal performance, these feed or feed additive compositions comprise one or more compounds that increase hydrogen production in ruminants, such as, but not limited to, 3-nitroxypropanol (3NOP) and one or more acetogens.

The invention provides a satellite methane emission sub-pixel unmixing and tracing method, and belongs to the technical field of environment monitoring. Comprising the following steps: S1, tower footing methane flux observation micrometeorological attribution analysis; s2, carrying out ground movement observation on emission hot spots; s3, building a satellite sub-pixel scale methane emission model under the support of tower footing and ground mobile observation data; and S4, sub-pixel unmixing and regional tracing: in the known observation regions in the steps S1 to S3, combining the methane emission flux of the TROPOMI with the methane emission under the scale of the TROPOMI pixel in the step S3 to form a function, and resolving the function equation to obtain sub-pixel unmixing model parameters, and applying the sub-pixel unmixing model parameters to TROPOMI satellite pixels without ground observation to obtain a larger-range methane emission tracing distribution map. According to the method, the dependence on a prior hypothesis is reduced, the stability and reliability of a de-mixing result are improved, the source region identification capability is enhanced, attribution decomposition of different emission sources is realized, and the space-time precision of emission estimation is improved.

The invention discloses a mining area methane emission inversion method based on satellite observation and a Gaussian plume model. The method comprises the following steps: S1, acquiring a satellite inversion XCH4 data set, meteorological data, emission list data and global energy monitoring data; s2, determining a methane emission source and a research area in a geographic map by using the emission list data and the global energy monitoring data; s3, obtaining methane background concentration and XCH4 enhancement in the geographic map by using an atmospheric background concentration calculation method; s4, combining XCH4 enhanced spatial distribution and meteorological data in a geographic map to identify a methane enhanced plume of a methane emission source in the research area; and S5, performing Gaussian plume flow field simulation inversion of the methane emission source through the Gaussian plume model, and outputting the methane emission rate of the methane emission source at the current time through inversion of the Gaussian plume model. According to the method, the methane emission and the time sequence data of the methane emission can be obtained through accurate inversion, the frequency of obtaining the methane emission is improved, and the methane emission can be obtained according to time scale accumulation.

Systems, devices, and methods including: an air inlet configured to receive air; an air outlet configured to expel air; a duct connected between the air inlet and the air outlet; and an open-cavity optical sensor disposed in the duct, where an air flow stream within the duct passes through the open-cavity optical sensor.

The invention discloses a point source methane emission wave band sensitivity enhancement signal identification method and system. The method aims at accurately identifying methane emission plume observed by a satellite. The identification method comprises the following key steps: data acquisition and preprocessing, refined construction of a methane unit absorption spectrum, sensitive wave band screening, and integration of a methane enhanced signal identification algorithm. The method solves the problems of suppressing false positive and enhancing methane signal detection, reduces the error of a methane concentration inversion result, improves the accuracy and reliability of methane identification by optimizing band selection and integrating an inversion algorithm especially in the aspect of point source methane emission plume identification, and has a good application prospect in the field of point source methane emission plume identification. And high-reliability data support is provided for refined methane emission identification and control.

The invention discloses a methane emission flux analysis method, device and equipment and a storage medium, and belongs to the technical field of atmosphere remote sensing monitoring, and the method comprises the following steps: obtaining methane vertical spectrum data and auxiliary observation data under a target area; based on the methane vertical spectrum data and the auxiliary observation data, separately calculating a source methane concentration field in a target height range; performing spatial-temporal characteristic analysis on the source methane concentration field to obtain a plurality of groups of spatial-temporal orthogonal characteristics, the spatial-temporal orthogonal characteristics being used for representing methane column concentration background change characteristics in a target area and dynamic difference of methane column concentration on a transmission path; and performing energy emission source analysis on the multiple groups of space-time orthogonal characteristics to obtain methane emission intensity distribution of the target area. According to the method, the analysis of the methane concentration can be realized through the statistical relationship, and the accurate analysis of the methane emission flux and the emission attribution can be realized.

The invention discloses a coal mine methane emission estimation method based on backward Lagrange random particle simulation. The method comprises the following steps: S1, acquiring satellite methane concentration monitoring data, meteorological data, EDGAR emission list data and GFEI global fuel development emission list data of a research area; s2, selecting a pixel as an observation point, obtaining an influence factor of methane emission of a virtual emission point pixel on the methane concentration of the observation point pixel through a backward Lagrangian random particle simulation model by utilizing meteorological data to reversely track the motion trail of particles, and constructing a source receptor matrix according to the influence factor; s3, the Bayesian methane emission estimation model carries out observation and prior constraint based on the objective function to obtain posterior emission data of the research area. According to the method, the source receptor matrix is constructed by using the motion trail of the meteorological data reverse tracking particles, and the Bayesian methane emission estimation model performs observation and prior constraint based on the target function to obtain posterior emission data of the research area, so that high-precision methane emission inversion estimation of the coal mine in the research area is realized.

Suppressing methane gas emissions from paddy rice cultivation is extremely important as a measure against global warming. The challenge here is to achieve both improved rice productivity and environmental protection. Specifically, this involves developing a device that can generate large quantities of high-concentration ultrafine bubble (UFB) water in a short time, by adding methane gas emission suppression to the UFB water. [Solution] The UFB generating apparatus of the present invention incorporates a variable-speed rotary stirring device into a UFB generation tank, and this tank is filled with sandy material. By supplying gas and water to this tank at high pressure, the sandy material layer of gas, water, and sandy material is liquefied. By rapidly rotating this liquefied layer with the rotary stirring device, the gas is confined in the pore water of the liquefied layer and then finely fragmented. Furthermore, by using sandy steel slag as the sandy material, in addition to the UFB effect, methane generation due to silica, lime, and iron oxide is suppressed and crop yields are improved.

The invention discloses a landfill methane long-term monitoring static box device and method, and relates to the technical field of landfill methane emission monitoring. The device comprises a box body with an opening in the bottom, a gas conveying unit, a gas mixing unit, a one-way low-pressure relief valve, a detection module, a power supply unit and a control system. The method comprises a deployment stage, an initialization stage and a monitoring stage, and the methane emission rate can be calculated by automatically injecting air, mixing gas and collecting and transmitting data. According to the device and the method, automatic and long-term continuous monitoring is realized, multi-dimensional parameters are synchronously acquired, the monitoring efficiency and the data continuity are improved, the problems that a traditional static box depends on manpower, the data dimension is single and the like are solved, and data support is provided for an emission reduction strategy.

The invention provides an intelligent optimization method for carbon emission reduction of an ecological pasture in extreme weather, and relates to the technical field of intelligent optimization of carbon emission reduction. Comprising the steps that initial monitoring data are collected and preprocessed, and multi-dimensional feature vector output state features are constructed; an LSTM time sequence prediction model is used for analyzing the state of the dairy cow and the activity of methanogens in the rumen, DHI data of an integrated gradient boosting tree model is used for analyzing the amino acid balance and precise nutrition technology of the lactating dairy cow, a dairy cow manure yield prediction model based on a Bayesian network is constructed, a manure management strategy is dynamically optimized, and manure management effect data is output. And constructing a carbon emission reduction comprehensive evaluation model, and evaluating the pasture carbon emission reduction effect. According to the invention, the rumen flora structure is regulated and controlled, the rumen greenhouse gas emission is controlled, the ruminant feed protein level is reduced, and the methane emission is reduced by researching the dairy cow carbon emission rumen microorganism regulation and control technology.

The invention provides an oil gas methane emission factor estimation method and device based on three-dimensional monitoring, and the method comprises the steps: determining a methane emission source and a diffusion region around the methane emission source based on a satellite remote sensing technology; acquiring unmanned aerial vehicle monitoring result data on a pre-planned monitoring route by using an unmanned aerial vehicle monitoring system; acquiring underway monitoring result data on a pre-planned monitoring route by using an underway monitoring system; monitoring all-weather foundation remote sensing monitoring data of a target emission source through a monitoring point by using a foundation remote sensing monitoring system; an emission accounting model is constructed, and the oil gas methane emission amount is calculated; based on the calculated oil gas methane emission amount, the oil gas activity level is combined, and the oil gas methane emission factor is calculated. The problems that emission factor data acquired by a single monitoring method is incomplete, the accuracy is low, and the updating timeliness is insufficient are solved.

The invention provides an equipment sealing assembly methane dissipation leakage monitoring and verification system and method, electronic equipment and a storage medium. Relates to the technical field of greenhouse gas methane leakage monitoring and emission accounting, and comprises a monitoring system and a verification system, the monitoring system is used for monitoring the real methane dissipation leakage amount of a sealing assembly and can be connected with the verification system through a pipeline, and the verification system is used for simulating the methane dissipation leakage process of the sealing assembly. And the accuracy of the monitoring value of the monitoring system is verified. According to the technical scheme, the problems that in the prior art, the methane leakage emission amount cannot be accurately monitored and checked, and the accuracy of the monitoring and checking result cannot be verified are solved.

The invention provides a method and system for quantitatively analyzing a coal mine methane emission reduction treatment policy, and relates to the technical field of data mining and informatization planning, and the method comprises the steps: obtaining text data of the coal mine methane emission reduction treatment policy; calling a large language model to analyze the policy text data, and extracting structured policy element evaluation in the policy text data to generate corresponding quantitative evaluation information; the quantitative evaluation information and the multi-source monitoring data of the coal mine methane are subjected to space-time alignment matching, a policy-monitoring associated data set is generated, and the policy-monitoring associated data set is used for driving or verifying a quantitative evaluation technical model of coal mine methane emission. By applying the scheme, quantitative analysis of the coal mine methane emission reduction governance policy can be objectively and efficiently realized, and accurate mapping and dynamic association between policy semantic information and objective monitoring data are realized.

The invention relates to a ruminant methane emission measuring system and method based on a milking robot, and the ruminant methane emission measuring system comprises a gas collection device which is arranged in a feeding trough area of the milking robot and is used for collecting sample gas in real time during the feeding period of ruminants, and the sample gas comprises animal exhaled gas; the gas analysis unit is connected with the gas collection device and is used for synchronously analyzing the concentration of methane and the concentration of carbon dioxide in the sample gas; and the data recording and processing unit is in communication connection with the gas analysis unit and is used for recording gas concentration data and detection time and calculating the daily methane emission amount based on the concentration data and the physiological parameters of the ruminant. According to the method, the milking window of the milking robot is used for measuring the methane emission amount of the dairy cow at the individual level for the first time, the balance of individual measurement record numbers is guaranteed, and automatic, high-throughput, large-scale and continuous monitoring is achieved.

The dual-fuel engine piston capable of reducing methane emission comprises a piston body, a concave pit is formed in the top face of the piston body to serve as a combustion chamber, the top face of the piston body is connected with the side face of the piston body through a flow guide face, and the combustion chamber is communicated with the flow guide face through a plurality of vortex grooves. A set included angle is formed between the vortex groove and the tangent line of the outer circumference of the combustion chamber; according to the utility model, the flow guide surface is arranged between the piston top surface and the piston side surface, so that natural gas in the backlash can be guided into the combustion chamber for combustion, and methane emission is further reduced. A vortex groove is formed in the top face of the piston, natural gas in a side gap passes through a flow guide face to a motion chamber in a combustion chamber and inevitably passes through the vortex groove, airflow is guided by the vortex groove to form a certain vortex in a cylinder, later-stage combustion is accelerated, combustion is more sufficient, and methane emission is further reduced.

The application discloses an online liquid methane preparation full-subcooling filling process, which comprises a liquid methane storage device, a pressurizing pipeline, a liquid methane subcooling filling device, a filling pipeline, a liquid methane discharge device and a discharge pipeline. The output end of the liquid methane storage device is connected with the input end of the pressurizing pipeline, the output end of the pressurizing pipeline is connected with the input end of the filling pipeline, and the filling pipeline is connected with a first filling branch and a second filling branch after passing through the liquid methane subcooling filling device. The first filling branch is used for being connected with a liquid methane storage tank on an arrow, and the second filling branch is used for being connected with the input end of the discharge pipeline. The output end of the discharge pipeline is connected with the liquid methane discharge device, and a discharge pipeline adjusting valve and a flow measuring instrument are arranged on the discharge pipeline. The system can guarantee stable liquid methane flow, avoid the risk of crystallization of subcooling liquid methane due to too low temperature, and realize full-subcooling filling of liquid methane.

The invention belongs to the field of animal feeding, and particularly relates to application of bacillus megatherium in preparation of fermented feed for reducing methane emission of mutton sheep, the bacillus megatherium is preserved in the China General Microbiological Culture Collection Center on December 6, 2004, and the preservation number is GMCCNo.1259. The invention also provides a fermented feed for reducing methane emission of mutton sheep, the degradation rate of straw rumen dry matter and crude protein can be remarkably increased, the ammonia nitrogen content in the feed is remarkably reduced, and the lactic acid bacteria content is remarkably increased.

The application discloses a method for promoting the absorption of methane in sheep grassland, and belongs to the field of environmental protection.The method is achieved by the following steps: applying nitrogen fertilizer to artificial sheep grassland in the growing season (June-September) to promote the absorption of methane in the grassland, so as to achieve the purpose of methane emission reduction.The nitrogen fertilizer added in the method is ammonium nitrate, the adding frequency is once a month, and the total dose is 100 kg N / hm 2 . Through the method, the total absorption amount of methane in the grassland in the growing season and the next spring freeze-thaw period is increased by more than 140% compared with the natural condition. The method is simple to operate and low in cost, and is helpful to the realization of the low-carbon target in the management process of artificial sheep grassland. In particular, in the next spring freeze-thaw period, the average value of the nitrogen application group is 7.1 mg m ‑2 , the average value of the nitrogen-free group is-5.0 mg m ‑2 , and the nitrogen application treatment increases the cumulative absorption amount of CH4 in the grassland soil in the spring freeze-thaw period by 240.4%.

Systems and methods for quantified water intake estimation and closed loop management of ruminants are disclosed. An ingestible reticular bolus transmits temperature data. A water source sensor measures water temperature and an ambient module provides THI. A processor detects drinking events from temperature slopes and amplitudes, applies a non-linear heat exchange model parameterized by measured water and ambient conditions to estimate per event volume, and accumulates daily intake. Control signals are generated to cooling, water, or feeding actuators according to hydration status and THI. Optional fusion with bolus accelerometry and near muzzle gas sensing estimates methane emissions per animal. The system integrates feed sensors and reproduction analytics, supports portable gateways for pasture, and provides traceability.

The application discloses a coal underground mining carbon emission calculation method, device, equipment, medium and product, relates to the field of carbon emission, and the method comprises the following steps: obtaining the original gas content, residual gas content and residual gas content of a target coal seam through a sensor; in the case of setting a coal pillar and not setting a coal pillar, respectively obtaining the total volume of methane emission according to the original gas content, residual gas content and residual gas content of the target coal seam, and obtaining the carbon emission intensity under different methane emission modes in the case of setting a coal pillar and not setting a coal pillar according to the methane emission mode and the total volume of methane emission. The application can improve the accuracy of carbon emission results.

The objective of the present invention is to provide, for example, a feed enabling effective suppression of methane emission by ruminants.　The present invention relates to, for example, a feed for ruminants, which is obtained by combining a methane emission inhibitor and a lumen-protected amino acid.

The present invention relates to the field of reducing methane emissions from ruminants. In particular, the present invention relates to administering to a ruminant diiodomethane in an amount of at least 0.5 g diiodomethane per animal per day for reducing methane production resulting from digestive activities of said ruminant.

An apparatus and method are provided for reducing methane emissions from ruminant animals by combusting methane gas extracted from the rumen. The system comprises a conduit configured to transport methane from the animal's rumen to a combustion module mounted externally or implanted partially or fully in a subdorsal position. The combustion module includes a pressure-activated valve, air intake, ignition system, and combustion chamber enclosed by a heat-absorbing roof structure. A control unit monitors internal gas pressure and triggers a spark ignition circuit when combustion conditions are satisfied. An upward-facing camera inhibits ignition if flammable obstructions are detected above the module. A water-filled thermal buffer integrated into the chamber roof moderates exhaust temperature, reducing wildfire risk. Power is supplied by a solar panel and rechargeable battery. The system intermittently converts methane into carbon dioxide and water vapor, significantly mitigating the greenhouse gas impact of enteric fermentation in ruminant livestock.

The application discloses a kind of methane emission monitoring method, system, equipment and storage medium, it is applied to industrial computer in TDLAS system, it is related to gas detection technical field, comprising: obtaining laser electric signal and solving absorption intensity, and based on light absorption intensity, the methane path integral concentration data corresponding to each scanning angle is determined, the spatial interpolation and fitting of each scanning angle data are carried out, the methane concentration data are obtained, and the methane surface density is determined accordingly, with gas diffusion cross section as integral interval, the methane mass density is obtained by integrating surface density, in combination with real-time wind speed and monitoring time length, the real-time emission rate and total emission are calculated, to improve the accuracy of methane emission monitoring.

The invention discloses a nano zeolite coupled biomass charcoal-based slow release fertilizer suitable for acidic rice soil, a preparation method and application, and aims to solve the problems of low pH value, high methane emission flux, low nutrient utilization rate and the like of the acidic rice soil. By constructing a nano zeolite-biomass charcoal-slow release fertilizer-silicon fertilizer synergistic regulation system, the stability of organic carbon in soil and the slow release capacity of nutrients are improved by utilizing a composite material formed by embedding nano zeolite into pores of biomass charcoal; the alkalinity and physiological functions of the silicon fertilizer are used for improving the soil pH and the oxygen secreting capacity of the rice root system, and cooperative emission reduction is achieved through the two paths of inhibiting methane generation and promoting methane oxidation. Field test results show that the pH value of acidic rice soil can be increased by 0.5-1.5 units in a rice growing season, the accumulated emission of methane is reduced by 27%-40%, and the rice yield is increased by 12%-20%. The invention has the advantages of easily available raw materials, simple process, good operability and the like, and can realize the synergistic effect of acid soil improvement, carbon sequestration and emission reduction and crop yield and efficiency increase.

The invention discloses a carbon collaboration-oriented mine fire area plugging material transaction and carbon credit generation method, which is realized based on a block chain platform, carries out digital chaining evidence storage on carbon collaboration attributes of materials and generates a unique digital identifier, and constructs a dynamic pricing model fused with environmental benefits by integrating real-time market supply and demand information, so as to realize carbon credit generation. The method comprises the following steps of: monitoring data in a block chain, driving transaction execution, performing full-process monitoring and data acquisition in material transportation, engineering application and subsequent service stages, continuously recording key state information in the block chain, dynamically evaluating the actual sealing efficiency based on in-situ monitoring data of a plugging body, and accurately calculating the real-time accumulated methane emission reduction according to the actual sealing efficiency. And finally, according to the verified emission reduction, a predefined conversion rule and verifiable contribution of each participant in the whole life cycle, automatically accounting and generating non-tampering carbon credit assets, and supporting subsequent management and transaction. According to the invention, full-chain credible communication and value quantification from material environmental protection attributes to final carbon credit generation are realized.

The invention relates to a stress restraint device for monitoring methane emission of cows and a methane emission monitoring system. The stress restraint device comprises two limb bundling units, a front limb limiting unit, a first horizontal adjusting unit, a first locking unit, a second horizontal adjusting unit, a second locking unit, a supporting unit and a head limiting unit. The device has the advantages that the forelimb movement limiting and distance matching effects are achieved through cooperation of the limb binding units and the forelimb limiting units, the forelimb limiting units are connected with the two limb binding units and adjust the distance, the forelimb opening range can be flexibly adjusted according to the body type of a cattle, and cattle stress caused by too tight constraint is avoided; the anti-disengaging and stabilizing effects of the forelimb limiting unit are achieved through cooperation of the forelimb limiting unit, the first locking unit and the second locking unit, the first locking unit and the second locking unit make contact with the two ends of the forelimb limiting unit correspondingly, the forelimb limiting unit is prevented from being disengaged from the limb binding unit, and it is ensured that forelimbs are restrained continuously and effectively.

The application discloses an integrated system and method for online observation of stable isotopes of multiple methane emission pathways in rice fields, collects methane gas emitted by plants and non-plant mediation respectively, pre-processes the gas by using a Nafion membrane drying tube and a correction algorithm, realizes continuous measurement of data by using a cavity ring-down spectrum-based analyzer, controls semi-automatic or full-automatic switching of different cavities by using a multi-channel switching and control module, and finally analyzes stable isotope characteristics of plant-mediated and non-plant-mediated emission by using a data processing module combined with a Keeling plot method, so that integrated, continuous and online observation of methane emission pathways in rice fields is realized, and real-time performance, comparability and model verification capability of data are significantly improved.

The invention provides a method for realizing nitrogen removal and methane emission reduction through QS regulation and control. The method comprises the following steps: providing a salt lake solution to be treated; denitrifying anaerobic methane oxidation microorganisms exist in the salt lake solution; the concentration of quorum sensing signal molecules C6-HSL in the salt lake solution is increased, so that the final concentration of the quorum sensing signal molecules C6-HSL in the salt lake solution is 98-102 [mu] g / L, the abundance of the denitrifying anaerobic methane oxidation microorganisms is increased through QS, and the denitrifying anaerobic methane oxidation reaction in the salt lake solution is promoted. According to the present invention, with the salt lake sediment oxidation promoting agent, the oxidation of CH4 in the salt lake sediment can be promoted, the degradation of NO3 <-> and NO2 <-> in the salt lake sediment can be promoted, the salt lake sediment can be directly decomposed into N2, the CH4 emission caused by the lake salinity reduction due to the glacier melting can be retarded, other influences can not be generated, and the environmental protection can be provided;

The invention provides a'rice + 'rotation farmland methane emission inhibitor as well as a preparation method and application thereof, and belongs to the technical field of environmental protection, in particular to the preparation method of the'rice +' rotation farmland methane emission inhibitor, which comprises the following steps: S1, recycling a used spontaneous heating patch, taking out contents, and grinding the contents into powder; s2, performing ultrasonic water washing on the powder obtained in the step S1 to remove salt and impurities; s3, soaking the washed powder in the step S2 by using a hydrogen peroxide solution to obtain an oxidized material; and S4, grinding the oxidized material obtained in the step S3 to obtain the methane emission inhibitor. The methane emission inhibitor provided by the invention can effectively reduce the greenhouse gas emission of rice + crop rotation soil, is simple in preparation method and low in raw material cost, and has a great application prospect.