150 results about "Methane emissions" patented technology

A method, and systems implementing such method, for reducing methane emissions by ruminants. The method includes providing a feed dispenser for feeding ruminants one or more nutrient supplements, and the feed dispenser includes a gas analyzer proximate to where the ruminant places its head. The method includes determining a particular ruminant has accessed the feed dispenser such as by reading an identifier from an RFID ear tag and operating the feed dispenser to provide a ration of methane-controlling nutrient supplement. The method includes using the gas analyzer to determine levels of carbon dioxide and methane and operating a data analyzing station to determine a ratio of methane to carbon dioxide and modify the type or amount of nutrient supplement for the ruminant for a next feeding to control methane production or achieve an animal production goal, such as by selectively operating a hopper with two or more supplements compartments.

A process for the utilization of the methane contained within ruminant animal exhalation, specifically to a process that utilizes the methane contained within ruminant animal exhalation as a source of carbon and/or energy for the production of methane-utilizing microorganisms in a microorganism growth-and-harvest apparatus.

A process for the utilization of the methane produced by enteric fermentation, specifically to a process that utilizes methane produced by ruminant animals through enteric fermentation as a source of carbon and/or energy for the directed production of methane-based goods or processes is provided.

The invention discloses an online analysis system for monitoring harmful gases in a livestock and poultry farm. The online analysis system comprises a sampling unit, a purifying unit and an analytic unit connected in turn. Steam with a constant pressure is introduced into the sampling unit, is sent into the purifying unit by an injection pump and then is passed into the gas analytic unit. Through multiple times of filtration and dehumidification treatments, the gasses exhausted by a ventilation opening of the livestock and poultry farm can be stably sampled under various working conditions, and the sampled gasses automatically undergo dust removal, dehumidification drying, pressure and flow stabilization, fine filtration, flow measurement and quantitative analysis. Besides, measurement range calibration and zero point calibration are performed on a gas analyzer through a standard gas connected with the analytic unit to realize online calibration of the analysis system. The invention also discloses an online analysis method for monitoring the harmful gasses in the livestock and poultry farm. Through the online analysis system and the online analysis method, hydrogen sulfide, ammonia gas, carbon dioxide, carbon monoxide and methane exhausted by the ventilation opening of the livestock and poultry farm can be accurately and reliably detected and analyzed online.

Several embodiments of the invention relate generally to a system and methods for the treatment of gaseous emissions comprising methane and one or more non-methane compounds that can influence the metabolism of methane-oxidizing microorganisms. In several embodiments, there is provided a system and methods for the treatment of methane emissions through the use of methanotrophic microorganisms to generate functionally consistent and harvestable products. Certain embodiments of the invention are particularly advantageous because they reduce environmentally-destructive methane emissions and produce harvestable end-products.

The present invention relates to a concentrated feed for simultaneous reduction of nitrogen, phosphorus and methane emission of cow. The concentrated feed includes: 46%-50% of corn, 5%-8% of a concentrated molasses fermentation liquid, 18%-24% of wheat bran, 6%-10% of cottonseed meal, 6%-10% of soybean meal, 0.7%-1.2% of salt, 1%-2% of sodium bicarbonate, 0.5%-1% of magnesium oxide, 1.0%-2.0% of stone flour, 0.15%-0.25% of isobutyric acid, and 0.08%-0.12% of 1% oregano oil powder. The invention uses the concentrated feed to regulate rumen fermentation of cow, improve intestinal amino acid balance and reduce dietary phosphorus levels in order to improve the utilization of nitrogen, phosphorus and energy, and the rate of milk production, as well as to reduce emissions of nitrogen, phosphorus and methane in dairy. The invention has economic benefits of reduce feeding cost and improving the utilization of nitrogen, energy and phosphorus of the cow, and milk yield, and has ecological benefits of reducing the emissions of nitrogen, phosphorus and methane in dairy to reduce environmental pollution, and integrates production increase, energy saving and emission reduction in one.

The invention discloses a microbial fuel cell, a power generation device provided with the microbial fuel cell, and application of the power generation device provided with the microbial fuel cell in microbial power generation in a rice field. The microbial fuel cell comprises an anode, a cathode and a proton exchange membrane; the cathode comprises a catalyst, a conductive material and adhesive; the catalyst is manganese dioxide; and the proton exchange membrane is waterproof breathable cloth. The microbial fuel cell is used for manufacturing the power generation device, and the power generation device applied in the rice field can compete with methanogen in the rice field on organic substances so as to reduce the discharge amount of methane in the rice field, reduce the emission of greenhouse gas and contribute to the global climate.

The present invention is a method and apparatus for remotely detecting methane gas in mines by laser remote sensing technologies. The apparatus has at least one light source emitting photons towards mine walls and at least one light detection device accepting photons reflected from mine walls. When methane gas presents at the optical path, these photons experience strong optical attenuation and indicate methane existence. The invention employs tunable laser spectroscopy technology to measure the concentration path length vectors. The invention further uses tomography algorithms to determine existence, concentration and distribution of methane gas from the measured concentration path length vectors. Explosions due to mix of methane mine gas with air can be prevented by sensing methane existence and minimizing its concentrations through methane drainage and ventilation.

The invention discloses a preparation method of methane-oxidizing bacteria preparation and relates to a mixed culturing method of methane-oxidizing bacteria. Mineralized waste is employed as the carrier and the seed source of the methane-oxidizing bacteria. Enrichment of the methane-oxidizing bacteria is carried out on the mineralized waste; then the enriched mineralized waste is added into the culture fluid of the improved formula of NMS culture fluid used for culturing normal methane-oxidizing bacteria; then the mixed gas of methane and oxygen with a volume ratio of 1:1 to 1: 1.5 is pumped to carry out culture. When the method is employed, the effect for culturing the methane-oxidizing bacteria is good and the starting is so quick that the largest methane oxidation rate can appear in about 2 days. The mixedly cultured methane-oxidizing bacteria avoid the problems that the traditional strain culture method and axenic isolation process are complex and the pure strains are not easily preserved. The preparation of the invention has a simple preparation method, and a remarkable methane oxidizing effect; moreover, the bacteria liquid is easy to be stored and transported. The preparation can be conveniently used for controlling the methane discharge in a refuse landfill and can also provide the methane-oxidizing bacteria strain for industrial production.

The invention relates to the technical field of feeds, in particular to a straw feed. A preparation method for the straw feed comprises the step of fermenting straws with a fermentation composition to obtain the straw feed; the fermentation composition comprises complex bacteria and complex enzymes; the complex bacteria comprise bacillus subtilis, bacillus amyloliquefaciesaccharomyces cerevisiae bifidobacteria, and bifidobacterium; the complex enzymes comprise cellulase and diastase. Through the adoption of the straw feed, the quality of livestock products can be improved; meanwhile, the methane emission from ruminants can be greatly reduced, the loss of methane energy is reduced, the energy digestibility of diets and the feed net energy are increased, and the pollution of livestock breeding to the environment is reduced.

The invention relates to a premix feed capable of reducing methane emission of cattle and sheep. The premix feed contains the following components by weight: 1.5-20.0 parts of a methane inhibitor, 5-15 parts of vitamin complex, 10-30 parts of mineral compound, 20-50 parts of sodium sulfate and 3-63.5 parts of a carrier. The premix feed involved in the invention employs green safe plant extracts rather than ionophore antibiotics or chemically synthesized electron acceptors to reduce methane emission; and considering from the perspective of resources in China, the premix feed mainly employs mulberry leaf flavonoid, which is abundant in resource and environment-friendly for extraction. The invention has the advantages of safety, practicality and effectiveness.

The invention discloses a method for fixing carbon and reducing emission in south paddy fields in winter. The method comprises steps of first, applying green fertilizer and planting in paddy fields in winter and re-applying green fertilizer in a broadcast sowing way before late rice harvest, second, covering the paddy fields via straws in winter, covering the straws on the paddy fields after paddy harvest rather than burning, third, conducting a moisture management mode smoothing water discharging, preventing waterlogging for the paddy fields in the whole winter via digging water discharging trenches, reducing methane emission via removing waterlogging environment, reducing emission via reducing substrate produced by greenhouse air, and fourth, turning over the paddy fields and restoring the green fertilizer and re-applying the same to the field, smashing the green fertilizer and harvesting before spring ploughing, conducting water-ploughing and turning the green fertilizer into the mud, restoring carbon and nitrogen nutrients fixed by the green fertilizer in winter into the paddy field soil in the above way, and maintaining long term effect of carbon fixation and emission reduction via addition of the soil carbon and nitrogen storage. The method is simple and convenient to operate, and enables the paddy fields in a fallow period to be effectively utilized; and beneficial effects of carbon fixation and emission reduction in winter can be achieved.

The invention discloses a preparation method for methane-oxidizing bacteria liquid. The preparation method comprises the following steps that mineralized refuse is mixed with leachate, cultivation is conducted on the condition that mixed gas of methane and oxygen is input, the methane-oxidizing bacteria liquid is obtained, and the methane oxidization rate of the mineralized refuse exceeds 50 %. The invention provides refuse landfill covering materials and a refuse landfill methane emission reduction method. The mineralized refuse is used as the source of the methane oxidation bacteria strain, the leachate is used as a culture medium to culture the methane oxidation bacteria in a mixed mode, the cultivation system is close to the environment of the landfill, oxidization efficiency of the methane in landfill gas is higher, and the methane oxidation rate can exceed 84 % when covering is conducted for 7 days.

The invention discloses a method for improving straw methane yield and reducing methane liquid by methane liquid circulation, which improves the methane yield of straw fermentation by 40-50%. A methane liquid recycle ratio is set to X according to methane liquid measurement index data, wherein X is more than or equal to 0% and is less than or equal to 100%; otherwise, the methane liquid is not recycled; the ammonia nitrogen concentration is Cmg/L; if C/15 is equal to N...n, the recycle ratio is that X is equal to (100-N)%; if the ammonia nitrogen concentration C is more than 1500mg/L, the methane liquid does not recycle; in addition, the auxiliary parameter range of the recycle ratio is that BOD (Biochemical Oxygen Demand) is more than or equal to 4000mg/L, COD (Chemical Oxygen Demand) is more than or equal to 10000mg/L, Zn2+ is more than or equal to 30mg/L, Cu2+ is more than or equal to 6mg/L and pH is more than or equal to 7.5; when the auxiliary parameter reaches a specified range, the methane liquid does not circulate; and the ammonia nitrogen concentration is regulated to be less than or equal to 200mg/L, the BOD is less than or equal to 500mg/L, the COD is less than or equal to 1000mg/L, Zn2+ is equal to 0, Cu2+ is equal to 0 and pH is equal to 6.8. The methane liquid is recycled by controlling the methane liquid circulation ratio, the methane emission is reduced, and meanwhile, cost is saved for stably operating the fermentation.

Feed additives and feed supplements for ruminants in a granular shape containing nitrates and sulfates encapsulated with vegetable fats in order to allow a slow release in the ruminal digestive tract, aiming at reducing methane emission originated by the fermentative processes of the animal digestive tract.

The invention discloses a method and a system for preparing a garbage biological earth covering material for emission reduction of methane in a landfill site. The method comprises the following steps: transferring garbage into a step-type intermittent aeration reactor, performing intermittent aeration on the reactor, and making the generated percolate pass through a water distributor to adjust humidity of the garbage, so as to further degrade organic substances in the garbage under the action of anaerobe and aerobe; at the same time, using the methane generated by anaerobic degradation of the garbage in the reactor to tame methane oxidized microbe in the garbage and improve oxidizing property of the methane; and finally twice sieving the garbage after being treated by the step-type intermittent aeration reactor to remove impurities without or with low methane oxidation activity. The method not only can tame the methane oxidized microbe in the process required by re-degradation of the garbage, and improve oxidizing property of the methane, but also use wastes after biological treatment of the garbage as raw materials, can achieve sustainability and reproducibility of biological treatment facilities for the garbage with low cost, and avoid agriculture competing soil resources.

A fertilizer with rice field methane emission reduction function comprises the following components in percentage by weight: 15-30% of lime nitrogen, 20-40% of ammonium chloride, 0-15% of ammonium dihydrogen phosphate, 0-40% of calcium superphosphate and 10-20% of potassium chloride; at least one of ammonium dihydrogen phosphate and calcium superphosphate is not zero. The applying method of the fertilizer comprises the following steps of: mixing at least one in the components, crushing, screening, pre-mixing according to weight ratio, granulating, drying, cooling to obtain a pre-mixed material; mixing with lime nitrogen having similar particle size according to mass ratio to obtain the fertilizer; before tillage, covering water on the surface of the rice field, spreading the fertilizer on the surface of the soil, irrigating with shallow water, turning over soils, mixing fertilizer and plough layer soils uniformly by soil tillage measures; and transplanting rice after 7-15 days after the fertilization and tillage. The fertilizer has significant effects of fertilizing soil fertility, preventing rice field soil from acidification, reducing rice field methane emission and the like.