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5697 results about "Biogas" patented technology

Biogas is the mixture of gases produced by the breakdown of organic matter in the absence of oxygen, usually consisting of certain quantities of methane and other constituents. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste. Biogas is a renewable energy source. In India, it is also known as "Gobar Gas".

Combined anaerobic fermentation process for organic solid wastes

The invention discloses a combined anaerobic fermentation method of organic solid wastes. The organic solid wastes used for the combined anaerobic fermentation include domestic wastes, excess sludge, feces, kitchen waste, straws, etc. The method comprises the following steps: carrying out different pre-processing processes to obtain organic materials with a granularity less than 5 mm; passing through a cutting pump, adjusting the C/N ratio, adjusting the water content, etc. to obtain a homogeneous fermentation substrate with a solid holdup of 2 to 10%; hydrolyzing and acidifying the fermentation substrate in the presence of a hydrolase; fermenting for a period of 15 to 25 days under the condition of stirring at a middle temperature of 32-38 DEG C to obtain biogas, which can be used for energy supply or output of a system; aging and desalting the biogas liquid to obtain a liquid humic acid fertilizer; and processing the biogas residues to a granular humic acid fertilizer. The fermentation substrate has proper C/N ratio to obviate feedback suppression of the substrate during the fermentation of a single material and simultaneously can enhance the hydrolysis effects of celluloses, lignin, hemicelluloses, etc. The method has the advantages of easy flow pattern control, low energy consumption, and no generation of sewages, and can obtain the high-quality biogas fluid and the high-quality granular humic acid fertilizer.

Novel sorbents and purification and bulk separation of gas streams

InactiveUS20080264254A1Large capacityLittle and no corrosive effectNitrous oxide captureGas treatmentSorbentDesorption
Porous-material-supported polymer sorbents and process for removal of undesirable gases such as H2S, COS, CO2, N2O, NO, NO2, SO2, SO3, HCl, HF, HCN, NH3, H2O, C2H5OH, CH3OH, HCHO, CHCl3, CH2Cl2, CH3Cl, CS2, C4H4S, CH3SH, and CH3—S—CH3 from various gas streams such as natural gas, coal/biomass gasification gas, biogas, landfill gas, coal mine gas, ammonia syngas, H2 and oxo-syngas, Fe ore reduction gas, reformate gas, refinery process gases, indoor air, fuel cell anode fuel gas and cathode air are disclosed. The sorbents have numerous advantages such as high breakthrough capacity, high sorption/desorption rates, little or no corrosive effect and are easily regenerated. The sorbents may be prepared by loading H2S—, COS—, CO2—, N2O, NO—, NO2—, SO2—, SO3—, HCl—, HF—, HCN—, NH3—, H2O—, C2H5OH—, CH3OH—, HCHO—, CHCl3—, CH2Cl2—, CH3Cl—, CS2—, C4H4S—, CH3SH—, CH3—S—CH3-philic polymer(s) or mixtures thereof, as well as any one or more of H2S—, COS—, CO2—, N2O, NO—, NO2—, SO2—, SO3—, HCl—, HF—, HCN—, NH3—, H2O—, C2H5OH—, CH3OH—, HCHO—, CHCl3—, CH2Cl2—, CH3Cl—, CS2—, C4H4S—, CH3SH—, CH3—S—CH3-philic compound(s) or mixtures thereof on to porous materials such as mesoporous, microporous or macroporous materials. The sorbents may be employed in processes such as one-stage and multi-stage processes to remove and recover H2S, COS, CO2, N2O, NO, NO2, SO2, SO3, HCl, HF, HCN, NH3, H2O, C2H5OH, CH3OH, HCHO, CHCl3, CH2Cl2, CH3Cl, CS2, C4H4S, CH3SH and CH3—S—CH3 from gas streams by use of, such as, fixed-bed sorbers, fluidized-bed sorbers, moving-bed sorbers, and rotating-bed sorbers.

Domestic garbage transformation technique, system and apparatus without conventional fuel for combustion supporting

The invention provides a process, a system and equipment for converting household garbage without support combustion of the prior fuels, which relates to a process and equipment for processing garbage. The process is characterized in that the household garbage is sent into a gasification furnace or an incinerator after separating, dehydrating by rolling compaction and air-drying treatment; garbage fuel is converted in the furnace by a mode of gasification or incineration, and is subjected to baking, pyrogenation, gasification and carbon residue burn-out in the furnace; the converted synthesis gas is used for cleaning energy; waste heat of incineration is absorbed by heat-exchange equipment for reclamation; garbage rolling liquid is sent into a digesting machine for anaerobic fermentation so as to produce biogas, the biogas is used as auxiliary fuel of the incinerator, and the digested residue and residual liquid are used for fertilizing crops; and inorganic substances separated from the garbage are used as raw materials to manufacture bricks, and clinker discharged from the incinerator or the gasification furnace is used for producing cement or fertilizer. The process, the system and the equipment comprehensively utilize the garbage so as to achieve complete dissolving treatment, and the equipment has a simple structure and low investment cost, and is easy to popularize..

Novel method for innocent treatment and utilization of dead livestock and poultry

The invention discloses a novel method of the harmless treatment and utilization of livestock and poultry which died of disease according to the steps as follows: firstly, various kinds of the animal bodies of the livestock and the poultry which died of disease are collected; secondly, the animal bodies are crushed; thirdly, the crushed animal bodies are sterilized under high temperature and highpressure and separated for filtering, the material of oil and fat flows into a cooling pool, and the material of hair and bone is dried; fourthly, the material of hair and bone after drying is carbonized; fifthly, the material of oil and fat after cooling is added with catalyst, high-efficiency compound microorganism, trash, organic wastewater and sludge; sixthly, the mixed organic material is put into an anaerobic tower to be fermented, and then biogas, biogas slurry and biogas slag are processed for three-phase separation; seventhly, the biogas is used for burning and generating electricity; eighthly, the biogas slurry inside a fertilizer storing pool is used as farmland fertilizer; ninthly, the biogas slag is added with the high-efficiency compound microorganism and the catalyst for secondary ferment; tenthly, the material after the secondary ferment is made into agricultural high-efficiency organic fertilizer. The invention solves the problem of the environmental pollution caused by the livestock and poultry which died of disease and change the waste livestock and poultry which died of disease into valuables.

Method for comprehensively recycling fecal sewage of large-scale livestock and poultry farms and farmland crop straws

InactiveCN102173507AOvercome the problem of insufficient productionIncrease gas productionBio-organic fraction processingWaste based fuelFecesSlurry
The invention relates to a method for comprehensively recycling the fecal sewage of large-scale livestock and poultry farms and farmland crop straws, which comprises the following steps of: (1) performing anaerobic digestion, namely regulating the solid content of the fecal sewage of livestock and poultry to be between 5 and 10 percent, adding anaerobic digestion inocula, and performing the anaerobic digestion to generate methane; (2) performing energy utilization on the methane, namely purifying the methane obtained in the step (1) to be used as fuel gas or allowing the purified methane to be used for power generation to perform energy utilization; (3) performing solid-liquid separation, namely performing the solid-liquid separation on biogas residues and biogas slurry which are obtainedin the step (1) to obtain the biogas slurry and the biogas residues of which the moisture content is about 60 percent; (4) preparing a biological organic compound fertilizer from the biogas slurry, and mixing the biogas residues and part of biogas slurry with the straws and part of excrement to perform aerobic compost; and (5) mixing and performing the aerobic compost, namely mixing part of biogas slurry obtained in the step (3) and the crushed straws, regulating the moisture content of the mixture to be between 50 and 60 percent, and performing the aerobic compost. In the method, clean resources are recovered by the anaerobic digestion, and the biogas slurry is used for producing the biological organic compound fertilizer with a high additional value.

Apparatus and Process for Production of Biogas

A process and an apparatus for the manufacture of biogas and a solids fraction from an organic waste feedstock is provided. The process involves thermal hydrolysis of the organic waste feedstock at a temperature from about 100 to about 220° C., a pressure from about 5 to about 20 bars, for a period of time from about 15 minutes to 4 hours, to produce a hydrolysate. The hydrolysate undergoes anaerobic digestion at a temperature from about 25 to 60° C., for a period of time from about 1 to 35 days to produce a biogas stream and a digestate. The digestate is separated into a solids fraction and a liquid fraction, and a portion of the solids fraction is recycled for further anaerobic digestion. The biogas stream, characterized as having a methane content from between 55 to 80% by volume, and the solids fraction, are recovered. The apparatus includes a receiving bin for receiving and supplying organic waste feedstock to a thermal hydrolysis reactor. The thermal hydrolysis reactor for processing the organic waste feedstock at a temperature from about 100 to about 220° C., a pressure from about 5 to about 20 bars, for a period of time from about 15 minutes to 4 hours to produce a hydrolysate. An anaerobic digester for processing the hydrolysate at a temperature from about 25 to 60° C., for a period of time from about 1 to 35 days to produce the biogas and a digestate, and a solids thickening tank for separating the digestate into the solid fraction, a liquid fraction and a secondary biogas fraction.

Efficient methane-generating pit using poultry excrement and methane generation process

The invention relates to a methane-generating pit using poultry excrement, which is integrally horizontally placed under the water plane. Partition walls are arranged in the middle of the methane-generating pit for dividing the whole methane-generating pit into a plurality of unit methane-generating pits, and medium channels arranged on the partition walls are communicated with each other. An annular fermentation tank is arranged above the periphery of the methane-generating pit, a plurality of superconductive heat pipes are arranged on the inner side of the annular fermentation tank, and the superconductive heat pipes are inserted into the methane-generating pit. A material inlet and a material outlet are respectively arranged at two ends of the methane-generating pit and under the unit methane-generating pits at two ends of the methane-generating pit, a methane collector is arranged above each unit methane-generating pit, and the methane collectors are directly communicated with a gas storage tank through pipelines. The methane-generating pit has the advantages of being high in material concentration, integrating material inlet, deslagging, methane generating, stirring, temperature controlling, regulating and the like, being high in mechanization degree, large in treating quantity, fast in digesting rate and the like and can meet requirements for scale production, and concentration of inlet materials of a continuous methane-generating pit can reach about 15%.

Comprehensive processing technology of organic wastes

The invention provides a comprehensive processing technology of organic wastes, belonging to the technical field of environmental protection, and in particular relates to resourcing comprehensive processing technology of organic wastes. The invention comprises the following steps: a. preparing materials: placing liquid or solid organic wastes into different storing tanks; b. pretreating: crashingthe organic wastes to particles with the granuality of being equal to or less than 30 mm, conveying the well-crashed materials into a stackretting tank for stackretting; c. mixing and matching variousorganic wastes and process water, wherein, the carbon nitrogen ratio (C/N) of the materials is 20-30:1, and the concentration of TS is 30%-35%; d. adding the inoculum, adopting high temperature dry anaerobic fermentation to carry out anaerobic fermentation on pretreated materials; and e. manufacturing from the biogas residues generated in step d into efficient multifungus composite ecological organic fertilizer, backflowing the generated biogas liquid to adjust the state of the anaerobic fermentation system or ensure the biogas liquid to enter the aerobic composting process flow, and introducing the generated biogas to a thermoelectricity cogeneration unit to provide electrical energy and thermal energy required by the process system. In the invention, composite microorganism agent and biogas residues and other base stocks are adopted for composite preparation, thus greatly improving fertilizer efficiency, lowering cost, having effects of diversification of nutrients, stable fertilizer efficiency and non pollution, and being suitable for being applied for various crops.

Functional bioorganic and semi-organic fertilizers and preparation method thereof

The invention discloses a functional bioorganic fertilizer and a semi-organic fertilizer and a preparation method thereof. The method comprises the following steps of: adding microzyme into livestock manure to perform anaerobic and aerobic fermentation; deodorizing, drying and crushing (after biogas slurry of residues after fermentation in a methane tank is separated, the biogas dregs are dried and crushed); adding a certain amount of humic acid, amino acid, borax, ammonium molybdate and zinc sulfate, or also adding nitrogen, phosphor and kalium inorganic nutrients; automatically blending materials by using a computer according to a proportion; after uniformly stirring, granulating by using a granulator, and drying, cooling and screening the grains; and coating a synergist and nitrogen-fixing, phosphorous-dissolving and potassium-releasing composite bacteria on qualified grains to prepare the functional bioorganic and semi-organic fertilizers. The product has the functions of preserving moisture and fertility, resisting drought, coldness, plant diseases and insect pests and the like, improves the soil structure, promoting the proliferation of beneficial microorganisms in soil, jointly participating substance circulation of a soil ecosystem and the like, has quick response and long effect, is mainly used as a base fertilizer for crops to save time and manpower, can realize waste recycling, protects ecological environment, integrates land utilization, land nourishment and land protection, and ensures constant soil productivity.

Reutilization treatment method of kitchen waste

The invention discloses a reutilization treatment method of kitchen waste, belonging to the technical field of rubbish treatment; the kitchen waste is treated by such procedures as pre-sorting, hydraulic pulping, anaerobic fermentation, organic fertilizer preparation by residues and oil-water separation, and the like, so that the grease in the kitchen waste is recycled, the organic matters are prepared to marsh gas by hydrolytic acidification and anaerobic fermentation, and the marsh gas is purified to be used as fuel, power generation or automobile fuel gas; in the whole treatment process, the liquid part in the kitchen waste except the removed grease is used for pulping in a pulp homogenizing system, all pulp participate in the anaerobic fermentation process, and the fermented biogas slurry is after-treated to prepare nutrient solution so as to realize the recycle of resources and zero release of pollutants; the treatment process is completely sealed, and the collected off-flavor is collected and treated by a deodorization system to be exhausted after reaching to the discharge standard. The method of the invention has the advantages of maximally recycling the resources, recycling the kitchen waste, guaranteeing non-pollutant discharge during the whole treatment process, and realizing the efficiency, reclamation and harmlessness of kitchen waste treatment.

Vertical non-stirred organic waste dry-type anaerobic digestion processing equipment and method

InactiveCN101381674AIncrease volumetric gas production rateOvercome the difficulty of homogeneous mixingBioreactor/fermenter combinationsBiological substance pretreatmentsSlurryEngineering
The invention discloses vertical equipment for treating organic waste by dry anaerobic digestion without stirring and a method thereof. The equipment comprises that a feed port and an air outlet are arranged on the vertical digester; a discharge port is arranged on the bottom of the vertical digester; a feeding storage tank is connected with the discharge port of the vertical digester through a pipeline, an inoculation mixing tank and a delivery pump; the discharge port of the vertical digester is connected with the inoculation mixing tank through a control valve; a biogas slurry discharge pipe is arranged on the lower part of the vertical digester, and is connected with a spraying device arranged on the upper part of the vertical digester through a pH value on-line monitor, a reflux pump sequentially; and an alkali solution storage tank is connected with the reflux pump through the pipeline and the control valve. The vertical equipment for treating organic waste by dry anaerobic digestion without stirring and the method thereof overcome the defects of difficult isotrope mixing, easy isotrope acidification and the like of the prior dry anaerobic digestion system, and is applicable to treatment on household organic garbage, kitchen garbage, excrement of fowls and livestocks, agricultural waste, garden garbage, sewage sludge and other organic waste.
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