64results about How to "Promotes anaerobic fermentation" patented technology

The invention relates to a kitchen waste disposal method which is characterized by comprising the following steps of: (1) sorting and removing impurities; (2) crushing a mixture the particle diameter of which is not greater than 8mm; (3) centrifugally separating to obtain a light phase and a heavy phase; (4) centrifugally separating the light phase into grease and a high-concentration solution; (5) hydrating for pulping and acidifying: carrying out water mill on the heavy phase and the high-concentration solution to prepare dense slurry and carrying out hydrolysis acidification on the dense slurry to obtain ground masses; and (6) carrying out anaerobic fermentation in an upflow anaerobic sludge bed to obtain methane. Compared with the prior art, the invention mainly improves the content of organic matter in the materials and greatly reduces the biogas residue yield through sorting, impurity removal and crushing; the grease which is not easy to acidified is removed through the centrifugal separation process and the oil and water separation process, which is beneficial to carrying out anaerobic fermentation; the insoluble organic matter is gradually converted into solvable organic matter through the hydration pulping process and the hydrolysis acidification process, and thereby, the anaerobic fermentation gas yield is improved, the sludge load factor is high and the biogas residue yield is very low.

The invention relates to a concentrated harmless treatment method for excrement of the breeding industry, particularly relates to a method for concentrated harmless treatment of livestock excrements to produce methane and an organic fertilizer and harmless treatment of sick and dead animal bodies to produce the organic fertilizer, and belongs to technique and equipment required in the fields of resources and environments. The method comprises four parts of excrement treatment, production of the organic fertilizer, treatment of sick and dead livestock, and intelligent control; the four parts are mutually related and mutually complement functionally, the methane can provide energy to conveniently realize high temperature sterilization, the fermentation of the organic fertilizer also requires the temperature, meanwhile, an organic fertilizer fermentation strain is also helpful for making the fertilizer through fermenting the sick and dead livestock in the later period, and the intelligent control is central nervous of the system, and has huge actions on efficient treatment and improvement of the treatment efficiency. The treatment method is reasonable in structure, the system is equipped, intelligent and efficient, and the method is suitable for popularization and application.

The invention relates to a method of treating feces in breeding industry, in particular relates to a method and a device for treating livestock feces in a breeding house underground to produce biogas and an organic fertilizer and belongs to the technology and equipment needed by resource and environment field. The device comprises a breeding house, a breeding house equipment room, a breeding house aisle, a feces gutter, a feces output pipe, a precipitation and impurity removal system, a solid-liquid separation system, a biogas digester system, a biogas temperature improvement and insulation system, a biogas reflux house flushing and crust breaking system and a biogas storage and purification system, wherein the breeding house, the breeding house equipment room, the breeding house aisle, the feces gutter, the feces output pipe, the precipitation and impurity removal system, the solid-liquid separation system, the biogas digester system, the biogas temperature improvement and insulation system, the biogas reflux house flushing and crust breaking system and the biogas storage and purification system are connected with one another. According to the method disclosed by the invention, the main treatment equipment is mounted in the breeding house underground, is small in occupied area, high in resource comprehensive utilization ratio and remarkable in economical and environmentally friendly benefits and is capable of purifying the biogas and producing the organic fertilizer.

The invention discloses a resourceful and clean sorting method of household garbage. The method comprises the following steps: breaking bags after sterilizing and deodorizing; tearing the garbage to pieces of 1-25cm and sterilizing and deodorizing again; crushing the treated garbage; squeezing the crushed garbage; placing squeezed waste liquid in an anaerobic fermentation system; sorting the squeezed garbage with a 2-15mm garbage screen, wherein the substance below the screen drops into water, and is screened by a 50-100 mesh screen to obtain paper slurry and the obtained paper slurry is dewatered and squeezed to obtain paper slurry crude product; mud and sand are removed from heavy substance after the paper slurry is separated and the heavy substance enters a construction material production line for sorting out of colored metal and is made to construction materials; the substance above the screen enters a floating sorting water box; substance with relative light specific weight such as plastic is separated; the light substance flows to a 1-5mm screen with the water and is transmitted to a plastic essence production line after being spinning-dried and dewatered. According to the method, the household garbage is effectively separated and is finally all processed to products and zero burning, zero land filling and zero emission are realized.

The invention discloses a sewage and sludge treatment system and an environmental-friendly recycling method thereof. The sewage and sludge treatment system comprises a collecting tank (1) and is characterized in that the bottom of the collecting tank (1) is connected with a sludge treatment device (2), a discharging port is formed in the bottom of the sludge treatment device (2), a control valve (7) is arranged on the discharging port, a sludge sedimentation cylinder (5) is mounted below the discharging port, more than one anaerobic reaction devices (6) are arranged on the outer side of the sludge sedimentation cylinder (5), an outlet of a reaction sludge dewatering device (12) is connected with a coulter mixing machine (14) through a screw conveyer (13), an outlet in the bottom of the coulter mixing machine (14) is connected with a pressure filtration device (16), and the pressure filtration device (16) is connected with a water reducing ball-making machine (19). According to the sewage and sludge treatment system, sewage and sludge treatment cost is low, the sewage and the sludge can be separated at low energy consumption, the recycling rate of energy sources in the sewage and the sludge is increased, and energy-saving and environmental-friendly effects are remarkable.

The invention discloses ganoderma cultivation waste feed.The ganoderma cultivation waste feed is prepared from ganoderma cultivation waste, traditional Chinese medicine residues, soybean molasses, a texturizer, a complex enzyme and a complex microbial inoculant.A long animal experiment indicates that the prepared ganoderma cultivation waste feed contains a large quantity of beneficial ingredients including lactic acid bacteria, saccharomycetes, bacillus amyloliquefaciens, protein, peptide, amino acid, lactic acid, citric acid, ganoderan and the like, and has the effects of promoting livestock and poultry growth and improving animal immunity.When the ganoderma cultivation waste feed is used for feeding pigs and other livestock, the appetite is promoted, diseases are reduced, pig fur is smooth, and skin is red; the lean meat rate is obviously increased, and meat is bright red; the odor of feces is obviously relieved, the air environment around a pigsty is greatly improved, and the health of a breeder and the pigs is further benefited; glucose oxidase and catalase can quickly use up oxygen in gaps of fermentation materials, anaerobic fermentation of saccharomycetes and lactic acid bacteria is promoted, more lactic acid is accumulated, and long-term storage of the fermented feed is promoted.

The invention discloses an alfalfa bundling and wrapping ensiling method, and belongs to the field of processing of silage. The method comprises the steps of rolling and cutting alfalfa with two sub-steps, spraying different additives with sub-steps and then bundling and wrapping. A good reproduction environment is created for the anaerobic fermentation of probiotics in an ensiling process, and the reproduction of other harmful bacteria is suppressed; the additives are high in acid productivity, so that the pH of feeds can be rapidly lowered to well store nutritional ingredients in the feeds, the quality of the feeds can also be improved, the livestock disease resistance enhancement capability of the feeds can be improved, and healthy growth of livestock can be promoted; the method is high in mechanization and automation degree, easy to operate and high in speed and efficiency, the influence of weather is slight, and the feeds are convenient to transport and apply.

The invention provides a method utilizing sludge anaerobic fermentation to produce fatty acid. The method comprises the following steps: taking sludge obtained from sewage treatment as a raw material; removing the supernatant after natural settlement to obtain a sludge sample, mixing the sludge sample and alkyl glycoside serving as a surfactant, and fermenting the mixture in the anaerobic environment to produce the fatty acid. The method can prevent the sludge sample from producing methane and improve the organic acid production capability of the sludge sample; the obtained organic acid can be continually applied in the sewage treatment process to improve the effect in removing nitrogen and phosphorus from sewage, so that reduction, harmlessness and recycling of sludge treatment can be realized.

The invention provides an anaerobic fermentation method of kitchen wastes and wastewater. The method comprises the following steps: (a) mixing the kitchen wastes and wastewater with a carbon source and a nitrogen source to obtain a mixed solution, wherein the mass ratio of carbon to nitrogen in the mixed solution is (30-40) to 1; (b) performing anaerobic fermentation on the mixed solution obtained from the step (a) to generate biogas. A study discovers that the kitchen wastes and wastewater contain higher content of soluble carbohydrate, protein and fat, the carbon content is higher, and the carbon-nitrogen ratio of the kitchen wastes and wastewater continues to be increased on the basis of higher carbon content, so that the anaerobic fermentation process can be conveniently conducted, the biogas yield can be increased, and the content of methane in the obtained biogas can be increased. An experimental result shows that the biogas yield is 383.0 mL / g and the content of methane in the obtained biogas can reach up to 85% in the method provided by the invention.

The invention belongs to the technical field of city solid waste treatment, and particularly relates to a discharging plasma co-disposal method for sludge and kitchen waste. According to the method, the discharging plasma technology of sludge and kitchen waste is used for accelerating damage of organic matter in sludge and kitchen waste to achieve the purpose of accelerating disposal of the two kinds of organic matter waste. Hydroxyl radicals, oxygen atoms, ozone and other active particles generated by discharging plasma can effectively damage the floccule structure, especially extracellular polymeric substances, of sludge, and protein, polysaccharide and other matter can be released; on the other hand, grease and fatty acid in kitchen waste are further damaged by the active particles, and sludge and kitchen waste can be mixed more sufficiently. The treated mixture is beneficial to activity of methanogens and acceleration of the anaerobic fermentation digestion process.

The invention discloses a mechanical and pneumatic combined dry anaerobic fermentation system. The system comprises a horizontal fermentation tank, a mechanical stirring assembly and a pneumatic stirring assembly, wherein the mechanical stirring assembly comprises a stirring shaft arranged in the axial direction of the horizontal fermentation tank and a plurality of blades arranged on the stirring shaft; the pneumatic stirring assembly comprises a first pneumatic pipe, a second pneumatic pipe and an air supply pipeline connected with the first pneumatic pipe and the second pneumatic pipe, and the first pneumatic pipe and the second pneumatic pipe are sequentially arranged in the axial direction of the horizontal fermentation tank. Through combination of the mechanical stirring assembly and the pneumatic stirring assembly, energy consumption of mechanical stirring is reduced, gas generated through fermentation is used for stirring, energy is saved, the first pneumatic pipe corresponds to the material acid production stage, the second pneumatic pipe corresponds to the material methane production stage, materials in the two stages are stirred in a differentiated mode, the stirring requirements of the materials in different stages are met, and efficient anaerobic fermentation of the fermented materials is facilitated.

The invention relates to a method for improving anaerobic fermentation of synthesis gas by using a carbon material. The method comprises the following steps: (1) adding the carbon material into an anaerobic reactor which takes anaerobic sludge as a starting microbial agent; (2) carrying out anaerobic fermentation in a way of aeration by taking the synthesis gas as a carbon source. Compared with the prior art, the method takes the carbon material as an additive, thus shortening the starting time of the anaerobic fermentation of the synthesis gas and obviously increasing a carbonic oxide degradation rate and a methane production rate. The method is simple to operate, and a device is simple. The synthesis gas and the carbon material are respectively used as the carbon source and the additive in a microbial anaerobic fermentation process, so that the biological refining and high-value utilization of waste can be realized.

The invention discloses a method for feeding live pigs through full-plant green corn bundled fermentation and an assorted harvester. The harvester comprises a vehicle body, a harvesting mechanism, a chopping mechanism, a delivering mechanism, a compression bundling mechanism, a juice recycling and spraying mechanism and the like. When the harvester walks forward in a field, full-plant green corn is slotted after being cut from the root and then enters a compressing cavity of the compression bundling mechanism, an auxiliary mixed with a fermentation inoculant on the harvester synchronously enters the compression cavity to be compressed and bundled, extruded juice is sprayed to the surface of the bundled full-plant corn, and then the corn is packed into a plastic sealing bag containing a unidirectional breather valve, and is put on the field after being covered with a plastic woven bag; the corn is transferred to a suitable place from the field, and is mixed with other feed after being stacked, stored, fermented, pulped and smashed to feed live pigs. Harvesting, smashing, mixing with inoculating microbes, compression bundling and bagging of the full-plant green corn are all completed in one harvester, and the full-plant green corn feed in accordance with live pig feeding is obtained through integration production.

The invention relates to a solid-state fermentation device and a solid-state fermentation method, and belongs to the technical field of white spirit brewing. Through the structural design of the solid-state fermentation device, the production mode of a traditional pit mud cellar is changed, a traditional brewing container becomes an automatic modern fermentation tank, and automatic transformation of brewing fermentation is facilitated; in the method, yellow water and alcohol fragrance are circulated up and down in the fermentation process, so that the fermented grains at the upper part and the lower part in the fermentation tank are in relatively consistent environmental conditions, and the fermentation quality of the fermented grains at the upper layer and the lower layer is kept consistent. Through staged control of heat preservation of the tank body, pit mud can be kept in a proper fermentation temperature stage, the influence of the external environment on the microbial fermentation process in the pit mud is reduced, and aroma-producing fermentation of pit mud is promoted. According to the invention, the innovation of an automatic production mode of a traditional mud pit fermentation mode is successfully realized, the production automation degree is improved, and the labor cost is reduced; meanwhile, the uniformity and consistency of fermentation are regulated and controlled, and the stability of fermentation quality is promoted.

The invention relates to cobalt-doped magnetic carbon and a preparation method and application thereof in hydrogen and methane production through anaerobic fermentation. According to the preparation method, a carbon material is utilized to load a magnetic compound containing iron and cobalt elements to prepare cobalt-doped magnetic carbon, and the magnetic carbon contains substances such as CoFe2O4, Fe2O3, FeFe2O4 and the like. when the cobalt-doped magnetic carbon is applied to the hydrogen and methane production process through anaerobic digestion, a large specific surface area and a developed pore structure of the cobalt-doped magnetic carbon can be utilized to enrich anaerobic microorganisms; meanwhile, the cobalt-doped magnetic carbon is rich in trace elements, so that the biologicalactivity and the growth metabolism of microorganisms are promoted, and the hydrogen and methane production process is completed in an anaerobic reactor. In addition, CoFe2O4 and FeFe2O4 are magnetic substances, after the anaerobic digestion process is finished, the CoFe2O4 and FeFeFe2O4 can be efficiently separated and recycled from sludge by utilizing a magnetic field, so that materials can be used repeatedly.

The invention belongs to the technical field of waste treatment, and particularly relates to a soil conditioner based on kitchen waste, a preparation method of the soil conditioner and a soil improvement method. The preparation method of the soil conditioner comprises the following steps: (1) treating raw materials; (2) washing and desalting; (3) performing centrifugal dehydration; (4) performingsecondary de-oiling; and (5) preparing the soil conditioner. The soil conditioner is applied to soil, mixed, irrigated and covered with a film, the salt content of the soil can be greatly reduced, thecontent of organic matters, total nitrogen, quick-acting phosphorus and quick-acting potassium in the soil can be increased, meanwhile, the pH of the soil can be increased, the volume weight of the soil can be reduced, formation of a soil aggregate structure can be promoted, and the porosity of the soil can be increased. Soil continuous cropping obstacles are reduced, and the incidence rate of crop soil-borne diseases caused by continuous cropping soil is reduced. The soil improvement method is high in treatment speed and free of pollution residues after treatment is completed, the physical and chemical properties of the secondary salinized soil can be remarkably improved, meanwhile, a new direction is provided for recycling of the kitchen waste, and the application prospect is great.

The invention discloses a method for improving the biogas generation property of anaerobic fermentation of chicken manure by adding charcoal. The method comprises steps of adding rice hull charcoal into chicken manure and implementing anaerobic fermentation to make biogas. The rice hull charcoal is prepared through rapid thermal cracking of rice hull in a biomass waste production liquid fuel device, the rice hull charcoal is adopted as an external additive to promote the chicken manure anaerobic fermentation biogas generation process, the problem of ammonia inhibition in chicken manure anaerobic fermentation biogas generation engineering can be solved, and the fermentation stability can be improved. By adopting the method, efficient and stable biogas production with chicken manure can be achieved, the fermentation cycle is short, the fermentation gas yield is large, the methane content is high, the operation is stable, the problem that a system is easy to break down in the chicken manure anaerobic fermentation process can be solved, meanwhile, fermentation residues rich in charcoal can be obtained, and agricultural production and soil improvement can be facilitated when the fermentation residues are used as organic fermentations. By adopting the method, theoretical foundations and data support are provided for energy and resource utilization of chicken manure and effective utilization of biogas slurry and biogas residues.

The invention belongs to the technical field of environment protection difficult treatment heavy metal treatment, and relates to a method for promoting heavy metal treatment in rest sludge. The concrete method comprises the following steps of performing ultrasonic pretreatment on the rest sludge containing heavy metal; then, charging the materials into an anaerobic reaction; adding biosurfactantsand calcium hydroxide into the reactor; performing stirring so that the substances in the reactor are uniformly mixed; meanwhile, controlling the fermentation temperature. The method provided by the invention has the advantages that the treatment and immobilization of the heavy metal in the sludge can be effectively promoted; the pollution of the heavy metal on the environment can be relieved; thefoundation is laid or the land utilization after the anaerobic treatment of the rest sludge; meanwhile, the positive guidance and reference significance can be realized on how to efficiently remove other heavy metal contaminants in the rest sludge.

The invention provides an efficient anaerobic fermentation device for straw fee. The device comprises a supporting seat pit, a synchronous lifting mechanism, a guide heat transfer part, a heat insulation layer, a steel bottom plate, a heat preserving fermenting box body, a pressure exhausting pipe, a side surface temperature measuring sensor and a core temperature measuring sensor; the steel bottom plate and the heat insulation layer are sequentially arranged on an upper opening of the supporting seat pit; the synchronous lifting mechanism is arranged in the supporting seat pit; the guide heat transfer part and the core temperature measuring sensor are respectively inserted into guide holes formed in the steel bottom plate and the heat insulation layer by sleeving; the lower ends of the guide heat transfer part and the core temperature measuring sensor are both mounted on the synchronous lifting mechanism; the heat preserving fermenting box body is arranged above the steel bottom plate to cover the supporting seat pit; the pressure exhausting pipe is arranged on a top plate of the heat preserving fermenting box body; the side surface temperature measuring sensor is arranged on the sidewall of the heat preserving fermenting box body; the core temperature measuring sensor is arranged in a distribution area of the guide heating part. With the adoption of the device, the straws can be subjected to efficient anaerobic fermentation; the temperature in straw fermentation can be kept stable and uniform, and thus the straws can be industrially fermented into base feed.

The invention relates to a whole plant green maize automatic fermenting and transporting device for livestock and poultry, and relates to the field of breeding. The whole plant green maize automatic fermenting and transporting device comprises a fixing frame, wherein a middle part stirring barrel is arranged in the fixing frame; a discharging opening is formed in the lower part of the middle partstirring barrel; a pipeline is arranged just below the discharging opening; screw conveyors are arranged in the pipeline; material leaking plates are arranged under the pipeline; material leaking holes are formed in each material leaking plate; a livestock and poultry material tank is arranged under the material leaking holes; and a material self-adjusting mechanism and an inserting and clamping type material mechanism are arranged on the fixing frame. According to the whole plant green maize automatic fermenting and transporting device disclosed by the invention, a green maize material storing tower adopts a carbon dioxide anaerobic environment, so that the anaerobic fermentation and the long-term storage of whole plant green maize and the falling of wet materials of the whole plant greenmaize are facilitated; the green maize material storing tower cooperates with a conventional dry material storage tank, so that dry material feeding and the whole plant green maize wet feeding are convenient, and the palatability of a feed is improved; besides, the insufficiency of nutrients of the whole plant green maize is complemented, and the nutritive requirements of pigs and poultry are met; and the shifting of automatic adjusting of wet materials is realized by own counter weight of the material self-adjusting mechanism, so that the design is ingenious and the cost is low.

The invention discloses a solar assisted methane fermentation device which is characterized in that a set of solar hot water device and a hot water circulating pump are also arranged above the original anaerobic fermentation tank, the inlet of the pump is connected with a lower outlet of a water collecting box of the solar hot water device, the outlet of the pump is connected with a heat radiator which is arranged in the fermentation tank, and the outlet of the heat radiator is connected with the water inlet of the hot water collecting box, so that the solar heat is transferred to the fermentation stock solution to promote the continuous operation of anaerobic fermentation, thereby effectively ensuring stable fermentation temperature and constant gas output and improving the level and the quality of life of rural residents.

The invention relates to a method of producing animal feed from straw, comprising the following steps: (1) grinding the dry crop straw with a common grinder for grinding the crop straw; (2) preparing aerobic fermented complex liquid; (3) spraying the aerobic fermented complex liquid on the ground dry crop straw in an aerobic fermenting tank, ventilating to increase the oxygen for the ground dry crop straw, stirring the ground dry crop straw and carrying out aerobic fermentation to obtain aerobic fermented material; (4) preparing anaerobic fermented complex liquid; (5) spraying the anaerobic fermented complex liquid on the aerobic fermented material to carry out aerobic fermentation and anaerobic fermentation to the fermented material at the same time to obtain straw-fermented animal feed.The high-quality animal feed can be produced on a large scale with low cost in several simple steps and can be effectively utilized in practice.

The invention relates to a high-efficiency cycle straw anaerobic fermentation system. The high-efficiency cycle straw anaerobic fermentation system comprises a straw pretreatment workshop, a biogas slurry input valve, a biogas slurry filtering workshop, a biochar filtering tank, a horizontal moving device, a suspended traction device, a filtrate output pipe mouth, a post treatment workshop, an anaerobic fermentation tank, a biogas slurry reflux pipeline, a biogas slurry output valve and a biogas slurry reflux valve. According to the high-efficiency cycle straw anaerobic fermentation system disclosed by the invention, the biochar filtering tank is utilized in a filtering process of the biogas slurry and also can realize an effect of better filtering particulate impurities; meanwhile, by filtering the biogas slurry through straws and carrying out degradation treatment on the straws by the biomass slurry, the high-efficiency cycle straw anaerobic fermentation system has the characteristics of complementation of each other's advantages, easiness in operation and high efficiency; multistage treatment of the straws is performed from the pretreatment workshop to the anaerobic fermentationtank, so that anaerobic fermentation of the straws is better facilitated; meanwhile, transportation and transfer of a regular hexahedronal box body are realized by horizontally moving a lifting device, so that labor force and material resources are reduced; on the whole, the high-efficiency cycle straw anaerobic fermentation system disclosed by the invention has the characteristics of simple structure and convenience in operation.

The invention provides a decrement processing system and method for excrement sources of large and medium-sized live pig farms. The decrement processing system comprises hog houses, wastewater collection pipes, excrement collection ditches, water collection tanks and excrement collection tanks, wherein the hog houses are divided into hog lots by virtue of spacing walls, water collection trenches are formed in the ground in the hog houses at intervals along the length directions of the hog houses and have the same lengths with the hog houses, the adjacent water collection trenches are mutually parallel, the water collection trenches are communicated with the wastewater collection pipes, the wastewater collection pipes are connected with the water collection tanks, and the water collection tanks are arranged at one ends of the hog houses; the floors of the hog houses are cement floors, and self-cleaning water permeable bricks are paved on the floors of the hog houses and cover the water collection trenches; and the excrement collection ditches are located on one sides of the hog houses along the length direction, are communicated with the hog lots and are connected with the excrement collection tanks. According to the decrement processing system, the production amount of sewage after excrement in the excrement collection tanks is subjected to solid-liquid separation can be effectively reduced and is reduced by 91.7% at a source, the processing difficulty of the decrement is reduced, and the processing cost is saved.

The invention discloses dry anaerobic fermentation treatment equipment for high-content organic solid waste. The equipment comprises a feed hopper, a crushing chamber, a crushing device, a dry anaerobic fermentation machine body and socles, wherein the socles are vertically connected to the bottom of the dry anaerobic fermentation machine body, the feed hopper is connected to the top of the dry anaerobic fermentation machine body, the feed hopper is communicated with the crushing chamber, and the crushing chamber is provided with the crushing device connected with the dry anaerobic fermentation machine body. Compared with the prior art, the equipment is advantaged in that alternate pulverization is performed, a scraping sleeve is taken as a static tool, a pulverizing knife is taken as a moving tool, so the organic solid waste attached to the crushing knife can be scraped in time; the situation that more organic solid waste is attached to surfaces of pulverizing cutters, and pulverizingof the organic solid waste is consequently affected is avoided, the pulverizing quality of the organic solid waste of the pulverizing cutters is improved, the organic solid waste is pulverized more thoroughly, follow-up anaerobic fermentation of the organic solid waste is facilitated, moreover, equipment does not stop, and pulverizing efficiency is greatly improved.

A sewage sludge treatment system and its environmental protection reuse method, comprising a collection pool (1), characterized in that: the bottom of the collection pool (1) is connected to a sludge treatment device (2), and the sludge treatment device ( 2) There is a discharge port at the bottom, a control valve (7) is installed on the discharge port, a sludge settling cylinder (5) is installed directly below the discharge port, and more than one drain is installed on the outside of the sludge settling cylinder (5). The oxygen reaction device (6), the outlet of the reaction sludge dehydration device (12) is connected with the coulter mixer (14) through the screw conveyor (13), and the bottom outlet of the coulter mixer (14) is connected with the filter press device ( 16) are connected, the filter press device (16) is connected with the water reducing and pelletizing machine (19), the cost of sewage sludge treatment in the present invention is relatively low, and the separation of sewage and sludge can be completed with low energy consumption, and sewage sludge The energy recovery and utilization rate has been improved, and the effect of energy saving and environmental protection is remarkable.

The invention discloses fertilizer for saline-alkali soil based on coal-fired flue gas desulfurization gypsum and sludge and a preparation method of the fertilizer. The fertilizer is prepared from thefollowing components in parts by weight: 20 to 40 parts of the coal-fired flue gas desulfurization gypsum, 20 to 40 parts of sewage treatment sludge, 40 to 80 parts of fresh plant waste and 5 to 10 parts of ammonium sulfate; Ca<2+> and Mg<2+> in the coal-fired flue gas desulfurization gypsum replace total exchangeable sodium in the saline-alkali soil, so that the content of the total exchangeablesodium in the saline-alkali soil is reduced, and a better soil environment for the normal growth of crops is provided; the sewage treatment sludge contains a large amount of nutrient substances whichhas rich organic matters, nitrogen, phosphorus and potassium, contains a large amount of anaerobic bacteria, and is convenient for quickly performing anaerobic fermentation on a compost pile; fresh plant waste powder is subjected to microbial decomposition and conversion to form humus, can improve the buffer ability of the soil, and can act with sodium carbonate to form sodium humate, so as to reduce the alkalinity of the soil; main raw materials of a soil modifier provided by the invention are taken from industrial and agricultural wastes, and are low-cost, and the improvement cost and the improvement efficiency of the saline-alkali soil are improved.

The invention belongs to the field of fermentation technology, in particular to a method of producing biogas from pig manure. With pig manure, ficus microcarpa leaves, a ficus microcarpa agent, lignin degrading bacteria, a reaction auxiliary agent, bentonite and activated carbon as raw materials, the components which are proportioned have a synergistic effect, so that organic matters in the raw materials are effectively degraded, and therefore, the problem that macromolecular organic matters in a first fermenting stage have low efficiency and inadequate reaction is solved, and the gas production rate of biomass is obviously improved, and the fermenting rate is accelerated.

The invention relates to a rural domestic sewage treatment system which comprises a water storage module and a percolation module; a water storage cavity is formed in the water storage module, the water storage module is provided with a first water inlet and a first water outlet, and the first water inlet is higher than the first water outlet; a percolation cavity is formed in the percolation module, the percolation module is provided with a second water inlet and a second water outlet, the second water inlet is higher than or flush with the second water outlet, and the second water inlet and the first water outlet are communicated and are the same in height; a percolation structure for sewage to pass through is arranged in the percolation cavity, the percolation structure comprises a first perforated plate, a multi-stage percolation layer and a second perforated plate, the multi-stage percolation layer comprises a quartz gravel layer, a first limestone gravel layer and a second limestone gravel layer, and the average particle size of the second limestone gravel layer is larger than that of the first limestone gravel layer; and the average particle size of the first limestone gravel layer is larger than that of the quartz gravel layer. According to the invention, the problems of poor harmless effect and poor sanitary condition of rural domestic sewage treatment are effectively improved.