CN214936918U - Cow dung regeneration sanitary bed-lying pad production system based on anaerobic dry fermentation - Google Patents

Abstract

The utility model discloses a cow dung regeneration health bed bedding production system based on anaerobism dry fermentation, including dirty equalizing basin of first excrement, one-level solid-liquid separation system, dry-type anaerobic fermentation jar, second grade solid-liquid separation system, natural pond sediment drying-machine, dirty equalizing basin of second excrement, wet-type anaerobic fermentation jar, natural pond liquid buffer memory pond and tertiary oxidation pond. The utility model is suitable for most large-scale cattle farms, has lower requirements on hardware of the cattle farms, and is particularly suitable for new construction or reconstruction and extension projects; the method solves the problem of cow dung pollution, reduces pollution emission, controls greenhouse gas emission, obtains partial clean energy, and simultaneously obtains the sterile clean cow bed padding which is subjected to harmless treatment.

Description

Cow dung regeneration sanitary bed-lying pad production system based on anaerobic dry fermentation

Technical Field

The utility model relates to an environmental protection engineering field, more specifically the utility model relates to a cow dung regeneration health bed bedding production system based on anaerobism dry fermentation.

Background

At present, with the rapid economic development of China and the improvement of the living standard of people, the proportion of milk products in the daily life of residents in China is larger and larger, the development of the milk industry becomes the fastest-developing industry in agricultural products, particularly in recent years, the dairy industry is thriving, a batch of modern dairy processing enterprises grow up and grow continuously, a large number of small and medium-sized dairy processing enterprises are also developed rapidly, the rise and the development of the processing industries powerfully promote the development of the dairy cattle breeding industry, and if the feces brought by large-scale centralized breeding cannot be reasonably treated and utilized well, a series of pollution problems are brought.

The cow dung is produced into the regenerated padding in part of existing cow farms, and compared with the existing sand (sandy soil) padding bed, rubber padding bed, wood chip (peanut shell and the like) padding bed and the like, the cow dung regenerated padding is fluffy and high in comfort level, and the lying time of cows can be prolonged. The cow dung regenerated padding also has the defect that when the cow dung is not treated in place, the regenerated padding is unqualified in sanitation and easy to carry or breed germs, and the biological safety of a cow farm is threatened. Therefore, meeting the sanitary standard of pasture padding and providing a comfortable lying bedding for cows are the difficulties that the cow dung regeneration padding process must overcome.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve current foretell problem, provide a cow dung regeneration health bed bedding and padding production system based on dry fermentation of anaerobism.

In order to realize the purpose, the technical scheme of the utility model is a cow dung regeneration sanitary bed pad production system based on anaerobic dry fermentation, which is characterized by comprising a first dung adjusting tank, a primary solid-liquid separation system, a dry anaerobic fermentation tank, a secondary solid-liquid separation system and a biogas residue dryer; the system comprises a first adjusting tank, a second adjusting tank, a wet anaerobic fermentation tank, a biogas slurry buffer tank and a third oxidation pond, wherein the excrement in the first excrement adjusting tank is conveyed to a first-stage solid-liquid separation system, the dry anaerobic fermentation tank, the second-stage solid-liquid separation system and a biogas residue dryer are sequentially connected with the first-stage solid-liquid separation system, the second excrement adjusting tank, the wet anaerobic fermentation tank, the biogas slurry buffer tank and the third oxidation pond are sequentially connected with the first-stage solid-liquid separation system, and the biogas slurry buffer tank is connected with the second-stage solid-liquid separation system.

Optionally, the first manure adjusting pool and the second manure adjusting pool are both provided with manure stirrers, and the manure stirrers can adjust stirring speed, stirring depth and stirring direction.

Optionally, a screw feeder is arranged between the primary solid-liquid separation system and the dry anaerobic fermentation tank, and the screw feeder is connected with the solid-liquid separator and the dry anaerobic fermentation tank.

Optionally, discharge pumps are arranged between the first fecal sewage regulating reservoir and the first-stage solid-liquid separation system, between the second fecal sewage regulating reservoir and the wet anaerobic fermentation tank, between the dry anaerobic fermentation tank and the second-stage solid-liquid separation system, and between the wet anaerobic fermentation tank and the second-stage solid-liquid separation system.

Optionally, the dry anaerobic fermentation tank is provided with a horizontal cross shaft stirrer and a discharging device, and the dry anaerobic fermentation tank is connected with the secondary solid-liquid separation system through the discharging device.

Optionally, a fermentation stirrer is arranged on the wet anaerobic fermentation tank, a submersible stirrer and a submersible sewage pump are fixedly arranged in the biogas slurry cache tank, and the submersible sewage pump is connected with the third-stage oxidation pond.

Optionally, a biogas residue feeding machine is arranged between the secondary solid-liquid separation system and the biogas residue dryer, and a biogas residue discharging machine is arranged at an outlet of the biogas residue dryer.

Optionally, the primary solid-liquid separation system comprises a first hydraulic extruder and a second hydraulic extruder, and the first hydraulic extruder and the second hydraulic extruder are connected in series.

Optionally, the second-stage solid-liquid separation system comprises a screw extruder, a third hydraulic extruder and a fourth hydraulic extruder, and the screw extruder, the third hydraulic extruder and the fourth hydraulic extruder are sequentially connected in series.

The utility model discloses following beneficial effect has: the method is suitable for most of large-scale cattle farms, has low requirements on hardware of the cattle farms, and is particularly suitable for newly built or reconstructed and expanded projects; the method solves the problem of cow dung pollution, reduces pollution emission, controls greenhouse gas emission, obtains partial clean energy, and simultaneously obtains the sterile clean cow bed padding which is subjected to harmless treatment; the cow dung biogas residue obtained by the process method is fluffy, moderate in water content, thorough in sterilization and high in comfort level, and can increase the lying time of the cow without damaging the cow body; the sanitary cattle bedding material is produced by using the cattle manure and the biogas residues, the raw materials come from the cattle farm and return to the cattle farm, the cyclic utilization of resources is achieved, the operation cost of the cattle farm is greatly reduced, and the input of exogenous pathogenic bacteria is isolated; the method realizes the high-efficiency treatment of the cow dung, and has the advantages of one-time investment saving, low operation cost and convenient operation management; the generated biogas is collected and utilized as clean energy for supplying heat or electricity in a field area, and the treated biogas slurry is used as a high-quality fertilizer for farmlands, can be used for planting pasture, rice, corn and wheat and the like, and has certain economic benefit; the method has the advantages of no secondary pollution, environmental friendliness, basically no odor emission, complete recycling of available resources, sustainable development effect on large-scale cattle farm cultivation, and good social and environmental benefits.

Drawings

FIG. 1 is a schematic diagram of a process flow structure of the present invention;

fig. 2 is a schematic structural diagram of a mechanical device according to the present invention.

1. A first manure adjusting tank; 2. a first stage solid-liquid separation system; 3. a dry anaerobic fermentation tank; 4. a secondary solid-liquid separation system; 5. a biogas residue dryer; 6. a second manure adjusting tank; 7. a wet anaerobic fermentation tank; 8. a biogas slurry buffer pool; 9. a third oxidation pond; 10. a manure stirrer; 11. a screw feeder; 12. a biogas residue discharging machine; 13. a fermentation agitator; 14. a discharge pump; 21. a first hydraulic extruder; 22. a second hydraulic extruder; 41. a screw extruder; 42. a third hydraulic extruder; 43. a fourth hydraulic extruder; 81. a submersible mixer; 82. a submersible sewage pump.

Detailed Description

The technical solution of the present invention is further described below with reference to the following specific embodiments and accompanying drawings:

example (b): a cow dung regeneration sanitary bedridden bedding production system based on anaerobic dry fermentation (see attached figures 1 and 2) mainly comprises a first dung adjusting tank 1, a second dung adjusting tank 6, a first-stage solid-liquid separation system 2, a dry anaerobic fermentation tank 3, a wet anaerobic fermentation tank 7, a second-stage solid-liquid separation system 4, a biogas residue dryer 5, a biogas slurry cache tank 8 and a third oxidation pond 9, wherein dung in the first dung adjusting tank is conveyed to the first-stage solid-liquid separation system, the dry anaerobic fermentation tank 3, the second-stage solid-liquid separation system 4 and the biogas residue dryer 5 are sequentially connected with the first-stage solid-liquid separation system 2, the second dung adjusting tank 6, the wet anaerobic fermentation tank 7, the biogas slurry cache tank 8 and the third oxidation pond 9 are sequentially connected with the first-stage biogas slurry solid-liquid separation system 2, the second biogas slurry cache tank 8 is connected with the second-stage solid-liquid separation system 4, discharge pumps are arranged between the first fecal sewage adjusting tank 1 and the first-stage solid-liquid separation system 2, between the second fecal sewage adjusting tank 6 and the wet anaerobic fermentation tank 7, between the dry anaerobic fermentation tank 3 and the second-stage solid-liquid separation system 4 and between the wet anaerobic fermentation tank 7 and the second-stage solid-liquid separation system 4.

The cow dung sewage treatment method comprises the steps that cow dung sewage generated in a cow house every day is collected and then enters a subsequent treatment unit, cow dung urine is homogenized through a first sewage adjusting tank 1 and then is sent to a first hydraulic extruder 21 of a primary solid-liquid separation system 2 through a pump, filtrate of the first hydraulic extruder enters a second hydraulic extruder 22 for secondary screening, extrusion and separation, cow dung solid residues screened by the first hydraulic extruder 21 and the second hydraulic extruder 22 are directly conveyed to a dry-type high-temperature anaerobic fermentation tank 3 through a screw feeder 11 to be fermented to generate methane, the filtrate enters a second sewage adjusting tank 6 and is pumped into a wet-type medium-temperature anaerobic fermentation tank 7 through a pump to be fermented to generate methane; the high-temperature dry fermentation discharge material is separated and screened by a screw extruder 41, a third hydraulic extruder 42 and a third hydraulic extruder 43 of a secondary solid-liquid separation system 4, the produced cow dung biogas residue enters a biogas residue dryer 5 through a biogas residue feeder and a feeding machine, the produced biogas slurry enters a tertiary oxidation pond 9 for storage, and the biogas slurry is directly used for farmlands in fertilizer application seasons. The generated marsh gas is used for heat for plants and the process equipment through a boiler, and the redundant marsh gas is used for power generation or purification.

Collecting all cattle manure into a collecting pool through a pipe duct or a manure suction truck, wherein the TS concentration of the manure is 8-15%, a manure stirrer 10, a manure lifting pump and a backwash pump are arranged in the manure collecting pool and the manure adjusting pool, all the manure is pumped into a solid-liquid separator through the lift pump for screening, and overflowing liquid flows back to the manure adjusting pool again; the screened solids are conveyed into a dry-type high-temperature anaerobic fermentation tank 3 through a belt and a screw, the TS concentration of the fed solids is between 25 and 30 percent, the retention time of the materials is between 15 and 20 days, the temperature of the dry-type high-temperature anaerobic fermentation tank 3 is controlled at 55 ℃, a discharging device adopts a plunger pump, and the TS concentration of the discharged materials subjected to dry-type anaerobic digestion is between 18 and 22 percent.

The dry-type high-temperature anaerobic fermentation tank 3 adopts a horizontal cross shaft type stirrer which is a cross shaft with a paddle at the center, the stirrer is a variable frequency motor, the rotation speed is reduced in multiple stages and is 1-2 revolutions per minute, the tank wall at the outer side of the fermentation tank is tightly attached to a layer of warming coil pipe, the warming coil pipe is made of seamless steel pipes, a 10-30cm fireproof rock wool heat-insulating layer is wrapped outside the warming coil pipe, a color steel tile with the thickness of 0.3-0.5mm is wrapped outside the heat-insulating layer, and the color of the color tile can be different; the dry anaerobic fermentation discharge is subjected to multi-stage solid-liquid separation and screening, the aperture of a screen mesh is 1-1.5 mm, 0.75-0.9 mm and 0.3-0.5mm respectively, the water content of the biogas residue solid material is 65-75%, and the concentration of TS of biogas slurry is 10-15%; the wet anaerobic fermentation discharge is screened by primary solid-liquid separation, the aperture of a screen mesh is 0.3-0.5mm, the water content of the cow dung biogas residue solid material is 65-75%, the TS concentration of biogas slurry is 3-5%, the cow dung biogas residue solid with the water content of 65-75% enters a biogas residue dryer 5 through a screw and a feeding machine, is conveyed through a mesh belt type conveying crawler belt, and takes away water vapor through dry hot air, wherein the conveying crawler belt is controlled by a variable frequency motor, the conveying speed can be adjusted, the water content of the discharged biogas residue is controlled to be lower than 45%, and the biogas residue is discharged through a biogas residue discharging machine 12.

Pumping the liquid of the excrement into a wet anaerobic fermentation tank 7 through a screw pump, wherein the TS concentration of the fed material of the excrement is 6-8%, discharging can be performed through overflow and a discharging pump 14, the TS concentration of the discharged material is 3-5%, the integral hydraulic retention time is 10-15 days, and the temperature is controlled to be 35 +/-1 ℃; the wet-type medium-temperature anaerobic fermentation tank adopts a vertical steel tank top stirring mode, the stirrer is a variable frequency motor, the rotating speed is 10-18 rpm, blades of the stirrer are three layers, a layer of temperature-increasing coil pipe is arranged at the bottom of the tank wall on the inner side of the fermentation tank, the temperature-increasing coil pipe is made of seamless steel pipes, the tank wall on the outer side of the fermentation tank is tightly attached to a 10-30cm fireproof rock wool heat-insulating layer, the heat-insulating layer is externally coated with color steel tiles with the thickness of 0.3-0.5mm, and the colors of the color tiles can be different.

The utility model provides a cow bed bedding and padding production technology is fit for the breed mode that adopts cow dung bedding and padding, through above-mentioned high temperature dry fermentation and the wet fermentation treatment of moderate temperature after, especially through dry-type anaerobic fermentation jar, the misce bene, high temperature 55 ℃ fermentation, it is thorough to disinfect, no dead angle, most organic matters in the cow dung of degradation simultaneously, after solid-liquid separation sieves, reentrant natural pond sediment drying-machine 5 is dried, reduce the moisture content from 65% -75% to below 45%, further disinfect innocent treatment. The dried cow dung biogas residues are used as cow bed padding and laid in a cowshed, and when a cow rests or moves, part of the padding and cow dung urine are mixed together and enter a dung treatment system, so that the cow dung biogas residues are recycled; the drying principle of the biogas residue dryer 5 is that dry hot air with the temperature lower than 95 ℃ enters a biogas residue drying chamber, dry hot air is introduced from the bottom and directly contacts with biogas residue, so that the drying surface area of the biogas residue is increased to the maximum extent, the drying rate of the biogas residue is maximized, and return air from the biogas residue drying chamber is humid hot gas with the temperature lower than 70 ℃ and directly enters a regenerative exchange and condensation dehumidification system. In the process, water vapor in return air is condensed and liquefied, and then is heated again by a hot water heating coil to form hot air at 95 ℃ and is sent into a drying chamber for the next cycle; dried cow dung biogas residues are fluffy and have the bulk density of about 0.3 ton/m, and are stored in a shady, dry, ventilated and large-space yard as cow bed padding, the padding is required to be rain-proof, snow-proof and seepage-proof, the padding is loaded on a special turning and throwing machine through a shovel during use, the padding is transported to a cow shed through the special turning and throwing machine to replace the padding, and the cow dung biogas residue padding yard needs 10-20 days of storage allowance and space.

The utility model discloses in, the excrement is the general name of mixture such as the discharged cow dung, cow urine and a small amount of drinking water drippage, sparge water, unrestrained bedding and padding for the cowshed is bred in scale captive breeding cattle house, is semi-solid state form, and dry matter concentration is higher, and TS concentration is between 8-15%, and VS/TS is between 70-90%, and total nitrogen content is 1000 and is 2000mg/L, and total phosphorus content is 400 and is 800 mg/L.

The utility model discloses in dirty equalizing basin 1 of first excrement, the pond is 1-2 meters dark, sets up 1-2 according to the project size, and the pond top has the top stirring, sets up the one deck, takes the multiunit paddle under a stock, and the stirring paddle leaf through the tine harrow type during rotation can stir the big piece of excrement of gathering the excrement and scattering, is provided with the steam pipe at the equalizing basin feed inlet simultaneously, can save to heat for the material and melt the freeze winter, avoids the project caking in the north winter.

The utility model discloses in, solid-liquid separation screening indicate that the particulate matter and the suspended solid that are greater than the screen cloth particle diameter in the ox excrement are from the excrement and dirt or the separation in the fermentation thing, obtain dry material and be used for the fermentation or do the bedding and padding, the equipment that uses is the screw rod squeezer or the screw rod of collocation inclined screen or shale shaker squeezes the all-in-one, can improve solid-liquid separation's efficiency.

The utility model discloses the dirty equalizing basin of well second excrement is 6 dark 3-6 meters, sets up 1-2 according to the project size, has the top stirring, and stirring paddle sets up two-layerly, can make the material stirring, prevents the top crust.

The utility model discloses well dry-type anaerobic fermentation jar 3 is horizontal cross axle fermentation cylinder, is equipped with the (mixing) shaft of a central zone paddle in the jar, and the paddle is arranged according to jar body size every uniform distance, and the mixer adopts inverter motor, and infinitely variable can regulate and control the stirring rotational speed for the material evenly gos forward. Aspect ratio of the fermenter was found in 3: 1-5: 1, a heating and insulating layer is arranged outside the fermentation tank, spiral feeding and discharging systems are arranged at the front end and the rear end of the fermentation tank, the top of the fermentation tank can be a flat top, and an integrated gas storage cabinet can be covered, so that the floor area is reduced, the high-temperature fermentation temperature is 55 ℃, the retention time is 15-20 days, thorough sterilization of excrement is ensured, and the degree of harmlessness is high.

The utility model discloses well wet-type anaerobic fermentation jar 7 is vertical jar, adopts efficient CSTR full mixing formula anaerobic reactor, and the aspect ratio is (1 ~ 1.5): 1, and the top is equipped with a mixer, and the mixer sets up the three-layer paddle, and the three-layer paddle sets up respectively, and upper paddle 0.5 meters under the fermentation cylinder normal operating liquid level department, can effectively break out cow dung crust; the middle paddle is positioned at the middle line of the operating liquid level of the tank body; the bottom paddle of the tank body is 2 meters away from the bottom of the tank, so that the bottom material can be stirred, and meanwhile, the bottom material cannot be stuck by the bottom settled sand accumulated gradually. The heating coil pipe is arranged in the lower area in the tank, and the insulating layer is arranged outside the tank, so that the constant-temperature fermentation state of the anaerobic tank can be ensured.

The utility model discloses well natural pond sediment drying-machine 5 adopts leading paver evenly to lay, and raw materials natural pond sediment gets into crushing, mixing system at first, evenly discharges the material through mixing machine and paves on the mesh belt conveyor track, and the mesh belt speed reducer adopts variable frequency speed governing control, and infinitely variable does benefit to the moisture content of adjusting the ejection of compact; and the dry hot air is introduced from the bottom and directly contacts the biogas residues, so that the drying surface area of the biogas residues is increased to the maximum extent, and the drying rate of the biogas residues is maximized. Low-temperature drying is adopted, dry hot air with the drying temperature lower than 95 ℃ enters a biogas residue drying chamber, return air from the biogas residue drying chamber is humid hot gas with the temperature lower than 70 ℃, and the return air directly enters a regenerative exchange and condensation dehumidification system. In the process, water vapor in return air is condensed and liquefied, and then heated again to 95 ℃ by a hot water heating coil pipe, and the hot air is sent into a drying chamber for the next circulation. In order to prevent dust explosion accidents in the biogas residue drying process, the mesh belt type static drying is adopted, the drying process is free of dust, and meanwhile, the drying process is carried out at a low temperature (the air supply temperature is controlled to be lower than 95 ℃), so that the purpose of inhibiting potential safety hazards from the source is achieved. In order to prevent the secondary pollution caused by the discharge of harmful gas along with hot and humid air during the heating and drying in a non-closed mode, the system adopts closed treatment in the drying process, the drying system keeps a proper negative pressure state in operation under the condition that the field condition allows, and the discharged gas enters a field waste gas pipe network, so that no toxic and harmful gas is discharged in the normal operation process of the equipment.

The utility model discloses well cow bed bedding and padding stock yard is the place of storage mummified cow dung natural pond sediment, requires rain-proof snow and prevention of seepage, and the storage requires machinery vehicles such as shady and cool, dry, ventilation, forklift to can get into to need to have 10-20 days deposit surplus and operating space.

The utility model discloses a middle-third oxidation pond is a system composed of a plurality of ponds with the depth of 4-6 meters, an anti-seepage film is laid at the bottom of the oxidation pond, a pressing bag is arranged on the anti-seepage film at intervals, the anti-seepage film is uniformly arranged, the anti-seepage film is prevented from floating, the top of the oxidation pond can be covered with a layer of HDPE film as required, and odor is prevented from being emitted and rainwater is prevented from entering; the biogas slurry after solid-liquid separation enters a subsequent three-stage oxidation pond for storage, the TS concentration of the biogas slurry entering the oxidation pond is between 3 and 6 percent, the cow dung biogas slurry entering the first-stage oxidation pond enters the next-stage oxidation pond in an overflow mode after each stage of oxidation pond is full, the storage time of the biogas slurry in the oxidation pond is more than 100 days, the biogas slurry is conveyed to a farmland orchard through a pump or a tank car in a fertilizer using season, and the TS concentration of the biogas slurry is between 1 and 2 percent after the biogas slurry is finally precipitated and decomposed by the multi-stage oxidation pond.

The utility model discloses the start-stop operation of all equipment such as the spiral business turn over material of well excrement dirt pump sending, the stirring, the fermentation cylinder, heat, drying-machine, solid-liquid separation machine can all be through on-the-spot manual, automatic and remote control, the equalizing basin, anaerobic jar all has the liquid level, the temperature, anaerobic fermentation jar fermentation product marsh gas state, these data all transmit to the central control room in real time, control the operation picture and show on the central control DCS display screen, central control room operating personnel can observe the running state of equipment in real time, the change situation of parameter, like anaerobic jar heating system can be according to the program chain that has set for, automatic operation, reduce manual operation error; the generated biogas enters a rear-end biogas purification system, is stored in a dry-type gas storage cabinet after desulfurization and dehydration, wherein the desulfurization is two-stage desulfurization of biological desulfurization and dry desulfurization, the content of hydrogen sulfide after desulfurization is lower than 50ppm, the dehydration is to reduce the temperature of the biogas by adopting a freezing dryer through the principle of a condensation method to remove moisture, the relative humidity is controlled to be below 70 percent, the purified biogas is preferentially used for boiler hot water for drying biogas residues and warming an anaerobic system, the temperature of a dry-type anaerobic fermentation tank is controlled to be 55 ℃, and the temperature of a wet-type anaerobic fermentation tank is controlled to be 35 +/-1 ℃ through real-time monitoring and PLC control of the temperature; the residual methane is used for power generation or purification.

The above detailed description is provided for illustrative purposes, and is not intended to limit the present invention, which is intended to cover any modifications and variations within the spirit and scope of the appended claims.

Claims (9)

1. A cow dung regeneration sanitary bedridden bedding production system based on anaerobic dry fermentation is characterized by comprising a first dung adjusting tank, a primary solid-liquid separation system, a dry anaerobic fermentation tank, a secondary solid-liquid separation system and a biogas residue dryer; the system comprises a second fecal sewage adjusting tank, a wet anaerobic fermentation tank, a biogas slurry cache tank and a third-level oxidation pond, wherein fecal sewage in the first fecal sewage adjusting tank is conveyed to a first-level solid-liquid separation system, the dry anaerobic fermentation tank, the second-level solid-liquid separation system and a biogas residue dryer are sequentially connected with the first-level solid-liquid separation system, the second fecal sewage adjusting tank, the wet anaerobic fermentation tank, the biogas slurry cache tank and the third-level oxidation pond are sequentially connected with the first-level solid-liquid separation system, and the biogas slurry cache tank is connected with the second-level solid-liquid separation system.

2. The system for producing cattle manure regeneration sanitary bedridden bedding and padding based on anaerobic dry fermentation as claimed in claim 1, wherein the first manure adjusting tank and the second manure adjusting tank are both provided with manure stirrers, and the manure stirrers can adjust the stirring speed, the stirring depth and the stirring direction.

3. The system for producing cow dung regenerated sanitary bedridden bedding and padding based on anaerobic dry fermentation as claimed in claim 1, wherein a spiral feeder is arranged between the primary solid-liquid separation system and the dry anaerobic fermentation tank, and the spiral feeder is connected with the primary solid-liquid separation system and the dry anaerobic fermentation tank.

4. The system for producing cattle manure regeneration sanitary bedridden bedding and padding based on anaerobic dry fermentation as claimed in claim 1, wherein discharge pumps are arranged between the first manure adjusting tank and the first-stage solid-liquid separation system, between the second manure adjusting tank and the wet anaerobic fermentation tank, between the dry anaerobic fermentation tank and the second-stage solid-liquid separation system, and between the wet anaerobic fermentation tank and the second-stage solid-liquid separation system.

5. The system for producing cow dung regenerated sanitary bedridden bedding and padding based on anaerobic dry fermentation as claimed in claim 1, wherein the dry anaerobic fermentation tank is provided with a horizontal cross shaft stirrer and a discharging device, and the dry anaerobic fermentation tank is connected with the secondary solid-liquid separation system through the discharging device.

6. The system for producing the cow dung regenerated sanitary bedridden bedding based on the anaerobic dry fermentation as claimed in any one of claims 1 to 5, wherein a fermentation stirrer is arranged on the wet anaerobic fermentation tank, a submersible stirrer and a submersible sewage pump are fixedly arranged in the biogas slurry cache tank, and the submersible sewage pump is connected with the third-stage oxidation pond.

7. The system for producing the cow dung regenerated sanitary bedridden bedding cushion based on the anaerobic dry fermentation as claimed in any one of claims 1 to 5, wherein a biogas residue feeding machine is arranged between the secondary solid-liquid separation system and a biogas residue dryer, and a biogas residue discharging machine is arranged at an outlet of the biogas residue dryer.

8. The system for producing cow dung regenerated sanitary bed-ridden bedding based on anaerobic dry fermentation according to any one of claims 1 to 5, wherein the primary solid-liquid separation system comprises a first hydraulic extruder and a second hydraulic extruder, and the first hydraulic extruder and the second hydraulic extruder are connected in series.

9. The system for producing cow dung regenerated sanitary bed-ridden bedding based on anaerobic dry fermentation according to any one of claims 1 to 5, wherein the secondary solid-liquid separation system comprises a screw extruder, a third hydraulic extruder and a fourth hydraulic extruder, and the screw extruder, the third hydraulic extruder and the fourth hydraulic extruder are connected in series in sequence.

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