5697 results about "Biogas" patented technology

A method and plant for the treatment of an organic waste material in liquid form, e.g. liquid manure from livestock, the method comprising filtering fibres and particles from the liquid, subjecting the liquid to anaerobic fermentation in a biogas reactor, separating a substantially sterile and particle-free permeate stream from the biogas reactor, e.g. using ultrafiltration, subjecting the permeate stream to treatment with an ammonia stripper at an elevated temperature and preferably at reduced pressure to remove substantially all ammonia and carbon dioxide and to result in an ammonia fraction and a nutrient salt fraction, and separating the nutrient salt fraction into a fertiliser concentrate fraction and a water fraction, e.g. using reverse osmosis. The end products of the method are clean water, ammonia concentrate, fertiliser concentrate containing salts of P and K, compost and high-quality biogas with a high methane content.

The invention relates to an organic environmentally-friendly soil conditioner for improving acidified or acid soil and a preparation method thereof. The soil conditioner is prepared from the following raw materials in parts by weight: 23-46 parts of biogas residue, 14-24 parts of shell powder, 16-25 parts of calcium magnesium phosphate fertilizer, 13-20 parts of plant ash, 0.1-0.2 part of chitosan, 5-7 parts of zeolite powder and 6-9 parts of bentonite. The soil conditioner is prepared through pretreatment of the biogas residue, pretreatment of the shell powder and the like; through the produced soil conditioner, the pH value of soil can be increased; nutritive elements such as calcium, magnesium, phosphorus, potassium and the like in the soil are increased; the organic matter content in the soil is increased; the water retention and fertilizer retention capacity of the soil is improved; the physicochemical property of the soil is improved; the antiretroviral (diseases, pests, drought and the like) capacity of crops is improved; heavy metal poison is reduced; and the soil conditioner is convenient to apply, is not influenced by wind power and is suitable for mechanical working.

The invention relates to a porous metal organic framework material based on transition metal cobalt and a preparation method thereof. The metal organic framework material is a compound with supramolecular porous network structure and formed by self-assembly of metal ions and organic ligands through coordination complexation. The porous cobalt-based metal organic framework material contains one or more metal ions, and one or more organic ligands; and at least one of the metal ions is Co (II). The porous cobalt-based organic framework material has excellent selective adsorption on CH4 in a separation process of CH4 and N2; and the advantage of adsorption selectivity on CH4 is particularly evident under low pressure. The material is particularly suitable for development and recovery of oil field gas, coal bed methane and biogas.

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.

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.

A method for an anaerobic digester system is provided that employs a cumulative data base to better monitor and control the anaerobic process, as compared with conventional anaerobic digester systems. The method includes the storing and ensiling of a feedstock, preferably a biomass, to form a digester feed material, which then processed by a digester. The process evolves a biogas and forms a digested material. The process is monitored, to collect a plurality of digester data from all stages of the process. These individual points or elements of the data are telemetered to a cumulative data base for storage and eventual retrieval and the cumulative data base is mined to compile predictive, feed forward controls and construct feedstock correlations between the metabolic activity within the digesters and an analysis of the feedstocks into the digesters. The method further includes the production of a high quality plant growth media from the digested mash, and recovery of the biogas generated within the digester. The biogas is collected with the aid of a biogas recovery system. The biogas is predominantly methane, and the anaerobic digester system is preferably operated to maximize the quantity and quality of methane generated.

Systems and methods are provided for converting organic waste materials from a municipal waste stream to useful products. Organic waste materials having a wide range of compositions such as, for example, yard waste, food waste, paper, and the organic fraction of municipal solid waste are converted into a uniform biomass that is suitable for conversion to useful products, such as fuels. Through the use of a biomixer and a hydropulper, as well as through sorting and screening, the organic waste materials are progressively reduced in size and cleaned of contamination. The resulting uniform biomass is suitable for anaerobic digestion to produce biogas and a residual solid that is suitable for producing a high quality compost.

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..

The invention relates to lightweight ecological nutrient soil for roof greening and a method for preparing the lightweight ecological nutrient soil. The nutrient soil is made of dry basis raw materials including 10-20% of biogas residues, 5-15% of slag, 10-20% of loess, 25-35% of rice hulls, 15-25% of mushroom residues and 15-30% of pine needle soil, and living earthworms accounting for 0.2-1% of the total mass of the dry basis raw materials. The nutrient soil is light in load, low in volume weight, free from hardening, resistant to trampling, fine in moisture and fertility preserving performance, pollution-free, extensive in source of raw materials, low in cost, simple in production process and easy to popularize.

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.

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.

Relating to the technical field of resource recovery and recycling, the invention discloses a resource-based and harmless treatment method for kitchen waste. The method is directed at the problems of high salt content in fertilizer products, easy cause of soil salinization, and large equipment investment for anaerobic fermentation of total waste in existing kitchen waste treatment methods. The method comprises the steps of: (a) kitchen waste sorting; (b) water bath desalting: adding water, and conducting heating and stirring to dilute salt; (c) solid-liquid separation: dehydrating the waste; (d) solid material aerobic fermentation: crushing the dehydrated solid material into small particles, and conducting aerobic fermentation and drying treatment to obtain an organic fertilizer; and (e) waste liquid anaerobic fermentation: conducting oil-water separation on the waste liquid, recovering grease, subjecting sewage to anaerobic fermentation, making the produced biogas residue and biogas slurry into a liquid fertilizer, and taking the produced biogas as the fuel of a biogas boiler. The method provided by the invention is particularly suitable for resource-based and harmless treatment of kitchen waste.

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.

The present invention relates to a process and apparatus for processing agricultural waste to make alcohol and/or biodiesel. The agricultural wastes are subjected to anaerobic digestion which produces a biogas stream containing methane, which is subsequently reformed to a syngas containing carbon monoxide and hydrogen. The syngas is converted to an alcohol which may be stored, sold, used, or fed directly to a reactor for production of biodiesel. The solids effluent from the anaerobic digester can be further utilized as slow release, organic certified fertilizer. Additionally, the wastewater from the process is acceptable for immediate reuse in agricultural operations.

Novel methods and apparatuses are disclosed for the treatment of wastewater to reduce often associated offensive odors by promoting aerobic conditions through decreasing the amount of oxygen required to maintain aerobic cultures and/or aerobic biological activity in the wastewater. Also, the wastewater is screened or otherwise separated the wastewater to remove or concentrate the solids which are anaerobically digested. By concentrating the solids, a smaller digester can be used. The anaerobic digestion produces biogas that may be collected and used, or burned by a flare or oxidized by a semipermeable membrane to deodorize the biogas. The heat produced from the biogas may have a variety of uses, including raising the temperature of the anaerobic digester and the bacterial metabolism. The wastewater is also clarified to remove nitrogenous and organic carbon wastes.

A process for removal and recovery of nutrients and recycling of water from digested manure or other organic wastes. A first step involves separating waste from an anaerobic digester into digested liquids, digested solids, and biogas. A second step involves precipitating solids from the digested liquids. A third step involves stripping ammonia from the digested liquids. A fourth step involves injecting an exhaust stream of carbon dioxide drawn from the co-generator into the digested liquids to reduce the pH and raise the temperature of the digested liquid. A fifth step involves recycling the digested liquids back to the anaerobic digester for use in diluting in coming solid wastes. A sixth step involves passing the excess ammonia stripped from the digested liquid through the digested solids to recover nitrogen through aborption with the resultant digested solids being usable as a biofertilizer with a high nitrogen content. A seventh step involves capturing the biogas for use in a co-generation system.

The present invention provides methods for the generation of methane by a two phase anaerobic phase system (APS) digestion of organic substrates. Also provided is a device for practicing the methods of the invention. The APS-digester system is a space-efficient, high-rate solids digestion system. The APS-digester system consists of one or more hydrolysis reactors, a buffer tank and one biogasification reactor.

The invention discloses an efficient resourceful treatment method through separation and anaerobic fermentation for kitchen waste. The method includes the steps of firstly performing preliminary bag breaking and leachate collection on original kitchen waste, and removing chunks of miscellaneous and foreign materials; then performing breaking separation, high temperature sterilization, solid-liquid separation and the like; and then performing oil-water separation, hydrolytic sand removal, hydrolytic acidification, anaerobic fermentation and the like. The method has the advantages that not only harmless kitchen waste is achieved, but also extracted crude oil and produced biogas have high economic benefit simultaneously, and the impurity removal rate of the kitchen waste can reach above 90%.

The invention discloses a comprehensive treatment method for kitchen waste, town excrement and municipal sludge, relating to the technical field of harmless resourceful treatment for waste. The comprehensive treatment method comprises the following steps of: pretreating the kitchen waste; pretreating the excrement waste; pretreating the municipal sludge; homogenizing; adjusting; fermenting at a medium temperature; dehydrating biogas residue; and performing biogas treatment. The degradation rate of organic matters in the waste reaches over 80 percent.

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%.

A process purifies raw biogas created from a renewable source into pipeline grade natural gas and/or D.O.T. specification, or other predetermined specification, gas. The automated scrubbing processed employed and the particular attributes of the system allow the system to function under extreme weather conditions by employing specific tools to control the temperature of the scrubbing water to allow for efficient and effective removal of the carbon dioxide gas. The system also employs specific measures to use recycled scrubbing water, thus eliminating the need for excessive water generally needed to economically employ this type of scrubbing process. The recycled water is continuously de-carbonated to allow the recycled water stream to effectively scrub the raw biogas. Treated gas from the process is then dried, and compressed for introduction into storage tanks or a natural gas pipeline delivery system.

The invention relates to the environmental protection field, the microalgae cultivation engineering field and the biodiesel refining field, specifically an integrated production method of organic sewage/waste residue treatment, microalgae culturing and oil refining. The method comprises: treating the organic sewage and organic waste residue respectively by anaerobic biochemical technology to generate biogas for generating electricity and supplying heat; performing aerobic biochemical treatment to the sewage and biogas slurry; blending into nutrient solution, and adding into large-scale photobioreactor; passing into biogas, burning to generate carbon dioxide waste gas for culturing oil-containing microalgae; collecting the obtained microalgae by air floatation method and breaking the walls; separating the oil-containing microalgae into microalgae oil, microalgae protein, microalgae polysaccharide and microalgae residue; and refining biodiesel accorded with the national standard using the microalgae oil as raw oil. The invention integrates the organic sewage and waste residue treatment, microalgae culturing and processing, and biodiesel refining; reduces production cost; realizes biodiesel clean production; and treats the 'three 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.

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.

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.

A pyrolysis system includes a generally cylindrical reactor chamber having two opposite ends and a longitudinal axis. The chamber has an inlet for receiving biomass, the inlet being adapted to prevent air from entering the chamber and being located at a first opposite end; a gas outlet for recuperating biogas produced in the reactor chamber, the gas outlet being adapted to prevent air from entering the chamber and being located at a second opposite end; and a solid outlet for recuperating charcoal produced in the reactor chamber, the solid outlet being adapted to prevent air from entering the chamber and being located at the second opposite end. The biomass is then subjected to indirect heating supplied by a heated rotor that decomposes the biomass in the absence of air or oxygen into a biogas and charcoal. A controller for controlling a rate of feed of biomass, extracted carbon residue and a temperature inside the reactor chamber is also provided. In a preferred embodiment, the shaft is heated by a portion of the energy recuperated from the pyrolysis system.

A method for processing organic material, in which method bioconversion is performed on the organic material in at least one first reactor, the biogas formed in the bioconversion is treated with ammonia in at least one second reactor and buffer solution produced in the second reactor is recycled to the bioconversion in the first reactor. Thus, the carbon dioxide of the mixed methane/carbon dioxide gas reacts with the ammonia and forms a buffer compound, such as ammonium bicarbonate and/or ammonium carbonate.

The invention relates to a soil amendment prepared from biogas residue and wormcast as main material and a preparation method of the soil amendment, which belongs to the technical field of recycling of organic fertilizer and agricultural waste resource. The soil amendment is composed of the main material, amine treated lignite, bone meal, bran, soybean meal, and the other additives. The method prepares the soil amendment by biogas residue and wormcast, utilizes waste reasonably and effectively, is low in cost, changes waste into treasure, and protects environment. In addition, the method has simple process, low energy consumption, easy operation, flexible production, and convenient usage, and is easy for large-area promotion and application.

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.

The invention relates to a biogas residue organic fertilizer and a preparation method thereof. The biogas residue organic fertilizer uses biogas residue as major raw materials (the consumption is higher than 80 percent) to be mixed with humic acid, nitrogenous fertilizers, phosphate fertilizers, potash fertilizers and trace elements. By aiming at two problems that the biogas residue can not be dewatered and solidified easily and the mechanical dewatering has high energy consumption, the invention utilizes a shallow tank natural solidifying and air drying process, and the biogas residue carries out aerobic secondary fermentation, air drying and solidification in a shallow tank to meet the pelletization moisture and physical property requirements. The biogas residue organic fertilizer of the invention can meet the requirement of nutrient required by crop growth, and can also fertilize the soil and improve the yield.