Cow dung recycling system and method for cow breeding in high-humidity area

Abstract

The invention relates to the technical field of cow dung treatment, in particular to a cow dung recycling system and method for cow breeding in a high-humidity region, and the system comprises a collecting and conveying unit, a solid-liquid separation unit, a circulating reflux unit, an aerobic fermentation unit, a padding treatment unit and a padding using unit which are arranged in a partitioned manner; the collecting and conveying unit is used for collecting and conveying cow dung and dung sewage in a feeding area; the solid-liquid separation unit is used for carrying out solid-liquid separation on the collected cow dung and dung sewage to form dung residues and dung liquid; the circulating reflux unit is used for performing circulating treatment on the manure liquid; the aerobic fermentation unit is used for performing aerobic fermentation treatment on the manure residues to obtain fermented padding; the padding treatment unit is used for carrying out dehumidification and sterilization treatment on the fermented padding to obtain the dehumidified and sterilized padding; and the padding using unit is used for carrying out standard laying and daily maintenance on the dehumidified and sterilized padding. The technical problems of difficult collection, difficult separation, difficult fermentation, difficult reuse and the like of cow breeding cow dung in high-humidity areas can be solved.

Description

Technical Field

[0001] This invention relates to the field of cow manure treatment technology, and in particular to a system and method for recycling cow manure from dairy farming in high-humidity areas. Background Technology

[0002] In high-humidity areas, dairy farming faces numerous challenges in manure management, becoming a key bottleneck restricting the sustainable development of dairy farms. These areas experience frequent rainfall and consistently high humidity, resulting in manure and bedding with moisture content far exceeding normal levels. This directly leads to a series of failures with traditional treatment methods: traditional composting fermentation, due to excessive moisture, generally suffers from slow heating, lengthy composting cycles, and low processing efficiency, failing to meet the core requirements of harmless manure treatment and ineffective in killing pathogens and weed seeds.

[0003] Meanwhile, high-moisture manure, in its thin, slurry form, not only occupies a significant amount of storage space and substantially increases transportation costs, but also easily leaks and seeps during storage and transportation, generating large amounts of high-concentration leachate. This leachate, once it seeps into the soil, pollutes groundwater and surface water. Furthermore, the manure slurry continuously releases malodorous gases such as methane, hydrogen sulfide, and ammonia during storage, severely damaging the air quality of the pasture and surrounding areas and exacerbating environmental pollution risks.

[0004] In addition, the humid environment provides ideal breeding conditions for pathogenic microorganisms such as fecal coliforms and Salmonella, as well as mosquitoes and flies, which greatly increases the biosecurity risk of dairy cow disease transmission. In terms of resource utilization, the gas production efficiency of high-moisture manure is extremely low when it is directly used for anaerobic fermentation, making it difficult to achieve energy conversion. On the other hand, direct return to the field results in poor economic efficiency for fertilizer utilization due to high transportation costs and low unit nutrient value. Summary of the Invention

[0005] One objective of this invention is to propose a dairy cow manure recycling system for high-humidity areas, in order to solve the technical problems of "difficulty in collection, separation, fermentation, and reuse" of dairy cow manure in high-humidity areas.

[0006] Another objective of this invention is to propose a method for recycling and utilizing cow manure from dairy farming in high-humidity areas, which is applied to the aforementioned cow manure recycling and utilization system for dairy farming in high-humidity areas.

[0007] To achieve this objective, the present invention adopts the following technical solution: A dairy manure recycling system for dairy farming in high-humidity areas includes a collection and conveying unit, a solid-liquid separation unit, a circulation and reflux unit, an aerobic fermentation unit, a bedding treatment unit, and a bedding application unit. The collection and conveying unit is located in the feeding area and is used to collect and convey cow manure and sewage from the feeding area. The solid-liquid separation unit and the circulation reflux unit are located in the separation zone. The solid-liquid separation unit is used to separate the collected cow manure and sewage into solid and liquid, forming manure residue and manure liquid. The circulation reflux unit is used to circulate the manure liquid. The aerobic fermentation unit and the bedding material treatment unit are located in the fermentation zone. The aerobic fermentation unit is used to perform aerobic fermentation on the manure residue to obtain fermented bedding material. The bedding material treatment unit is used to perform dehumidification and sterilization treatment on the fermented bedding material to obtain dehumidified and sterilized bedding material. The bedding material application unit is located in the application area and is used for the standardized laying and daily maintenance of the bedding material after dehumidification and sterilization.

[0008] Preferably, the feeding area includes multiple spaced-apart feeding pens, which are used to feed dairy cows. Feeding channels are provided between adjacent feeding pens. A feeding channel is provided on the side of the feeding pen closest to the feeding channel, and a manure scraping channel is provided on the side opposite to the feeding channel. The feeding channel and the manure scraping channel are both provided with a groove in the middle, the underground pipe is located in the groove, and a collection trough is provided at one end of the feeding channel, the manure scraping channel and the underground pipe. The collection and conveying unit includes a traction machine, a channel scraper, and a pipeline scraper; The channel scraper is located in the feeding channel and the manure scraping channel, and the pipe scraper is located inside the underground pipe; The four corners of the feeding pen are equipped with corner wheels, and chains are wound around the outer surfaces of the four corner wheels. The traction machine drives the chains to pull the channel scraper and the pipe scraper.

[0009] Preferably, the separation zone includes a primary separation space, a secondary separation space, and a fecal residue storage space; The solid-liquid separation unit includes a conveying pump, a stirring separation device, a roller pressing separation device, a feeding pump, and a primary quicklime addition device. The conveying pump is connected to the collection tank through a conveying pipeline. The conveying pump is used to convey cow dung and sewage in the collection tank to the primary separation space. The stirring separation device is set in the primary separation space. The stirring separation device is used to perform primary solid-liquid separation on cow dung and sewage. The feeding pump is provided between the primary separation space and the secondary separation space. The two ends of the feeding pump are connected to the primary separation space and the secondary separation space through feeding pipes. The feeding pump is used to transport the fecal residue after primary separation in the primary separation space to the secondary separation space. The roller press separation device is set in the secondary separation space. The roller press separation device is used to perform secondary solid-liquid separation on the fecal residue after primary separation. The manure storage space is used to store manure residue after secondary solid-liquid separation. The primary quicklime addition device is installed in the manure storage space. The primary quicklime addition device is used to add quicklime to the manure residue after secondary solid-liquid separation and mix it evenly to obtain pretreated manure residue.

[0010] Preferably, both the primary separation space and the secondary separation space are provided with a filtration port at the bottom, and the filtration port is equipped with a filter screen. The other end of the feeding channel, the manure scraping channel and the underground pipe are all provided with a backflushing port. The circulating reflux unit includes a connecting pipeline between the filtrate inlet and the backflushing inlet. A backflushing pump is provided on the connecting pipeline. The backflushing pump is used to transport the fecal liquid separated in the primary separation space and the secondary separation space together to the backflushing inlet to flush the feeding channel, the scraping channel and the underground pipeline.

[0011] Preferably, the fermentation zone includes a fermentation tank, and the fermentation tank is lined with a layer of fermentation material; The aerobic fermentation unit includes aeration pipes, a Roots blower, an online thermometer and hygrometer, and a chain plate turner; The aeration pipes are laid alternately along the length and width of the fermentation tank at the bottom of the fermentation tank. The aeration pipes have several air outlets and are connected to the Roots blower. Multiple online temperature and humidity meters are installed at intervals in the fermentation zone; The chain plate turning machine operates along the length of the fermentation tank and is used to turn over the fermentation material layer and the secondary separated manure residue to form post-fermentation bedding material.

[0012] Preferably, the fermentation zone further includes a bedding material processing space for placing fermented bedding material. The bedding material treatment unit includes a secondary quicklime addition device and a high-chlorine bleaching powder mixing device; The secondary quicklime addition device and the high-chlorine bleaching powder mixing device are located in the bedding material treatment space; The secondary quicklime addition device is used to add quicklime to the fermented bedding material and mix it evenly to form the primary treated bedding material. The high-chlorine bleaching powder mixing device is used to add high-chlorine bleaching powder to the primary treated bedding material and mix it evenly to form a dehumidified and sterilized bedding material.

[0013] Preferably, the use area includes multiple spaced-apart deep pit beds; The bedding material usage unit includes a material delivery vehicle and a rotary tiller disinfection machine; The material delivery vehicle is used to scatter the dehumidified and sterilized bedding material onto the deep pit bed; The deep pit bed is used to hold the treated bedding material for dairy cows to rest on; The rotary tillage sterilizer is used to till and sterilize the bedding material of the deep pit bed.

[0014] A method for recycling and utilizing manure from dairy farming in high-humidity areas, applied to the aforementioned manure recycling and utilization system for dairy farming in high-humidity areas, includes the following steps: S1. Collection of manure and sewage in the feeding area: Start the tractor to drive the chain to move, which will move the scraper in the channel and the scraper in the pipe, and simultaneously transport the cow manure in the feeding channel and the manure scraping channel, as well as the cow manure and sewage in the underground pipe to the collection tank. S2. Graded solid-liquid separation and manure sludge pretreatment: First, the cow manure and sewage in the collection tank are separated into solid and liquid phases using a stirring separator to obtain manure sludge with a solid content of 25%; then, the manure sludge after the first separation is separated into solid and liquid phases using a roller press separator to obtain manure sludge with a solid content of 35%; quicklime is added to the manure sludge after the second separation at a mass ratio of 1% and stirred evenly to obtain pretreated manure sludge; S3. Fecal liquid circulation treatment: Start the backwash pump to transport the fecal liquid generated by the primary and secondary separation to the backwash port to flush the feeding passage, the scraping passage and the underground pipe. The remaining fecal liquid is sent to the sewage treatment system. S4. Aerobic fermentation of manure residue: A 50 cm thick layer of fermentation material is laid in the fermentation tank. The Roots blower supplies air at a fixed frequency. After the pre-treated manure residue is put into the fermentation tank, the chain plate turning machine turns and throws it every day to maintain a fermentation temperature of 65-75℃ for 6-8 days to obtain fermented bedding material. S5. Dehumidification and sterilization of bedding material: Add quicklime to the fermented bedding material at a mass ratio of 1.3% and pile it up for 2 days to form the bedding material after primary treatment. Then add high-chlorine bleaching powder to the bedding material after primary treatment at a mass ratio of 7.5 kg / m³ and mix to obtain dehumidification and sterilization bedding material. At the same time, return 1 ton of bedding material to the feed inlet of the fermentation tank. S6. Bedding material laying and maintenance: The material delivery vehicle spreads the dehumidified and sterilized bedding material to the deep pit bed at a thickness of 30-45cm. The rotary tiller and disinfection machine turns the bedding material over daily and regularly cleans up the overly wet bedding material and returns it to the grading solid-liquid separation step. S7. Bedding material quality inspection: Regularly sample and send for testing. If the quality does not meet the standards, return the bedding material to the dehumidification and sterilization step.

[0015] Preferably, in S4, the fermentation material layer is made of a mixture of long rice straw and fermentation bacteria, wherein the amount of fermentation bacteria used is 1 kg per 40 square meters of fermentation bed, and the effective live bacteria count of the fermentation bacteria is 2 billion / gram, and the components include Bacillus, yeast and cellulase.

[0016] Preferably, in S4, fermentation bacteria are added when the fermentation temperature is below 65°C, and the number of turnings is increased when the fermentation temperature is above 75°C.

[0017] One of the above technical solutions has the following beneficial effects: (1) From the system level, we can comprehensively solve the technical problems of “difficulty in collection, separation, fermentation and reuse” of dairy cow manure in high humidity areas, change the status quo of disorderly accumulation and low treatment efficiency of manure in traditional treatment methods, and realize the whole process of manure from generation to reuse is controllable and efficient. (2) Each functional unit is designed with a layout of “feeding area - separation area - fermentation area - use area”, which avoids cross-contamination of manure and sewage in different treatment stages and facilitates the optimization of equipment configuration according to the functional needs of each area, thus significantly improving the overall operating efficiency of the system. (3) The closed-loop design not only reduces the pollution of groundwater, surface water and air caused by manure discharge and reduces greenhouse gas emissions, but also transforms cow manure into reusable cow bedding material, realizing resource recycling and saving bedding material procurement costs for dairy farms in high-humidity areas, which is in line with the concept of circular agriculture development and the needs of sustainable farm operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a dairy cow manure recycling system in a high-humidity area. Figure 2 This is a top-view schematic diagram of the feeding area in a dairy cow manure recycling system for dairy farming in high-humidity areas. Figure 3 This is a side view of the feeding area in a manure recycling system for dairy farming in high-humidity areas. Figure 4 This is a cross-sectional schematic diagram of a groove in the feeding area of ​​a dairy cow manure recycling system in a high-humidity area. Figure 5 This is a top-view schematic diagram of the separation zone in a dairy manure recycling system for dairy farming in high-humidity areas. Figure 6 yes Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a schematic diagram of a bedding material treatment device in a dairy cow manure recycling system for dairy farming in high-humidity areas. Figure 8 This is a schematic diagram of the fermentation zone in a dairy cow manure recycling system for high-humidity areas. Figure 9 This is a schematic diagram of the structure of the usage area in a dairy cow manure recycling system for high-humidity areas. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "left," "right," "vertical," "level," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] A dairy cow manure recycling system for high-humidity areas includes a collection and conveying unit 1, a solid-liquid separation unit 2, a circulation and reflux unit 3, an aerobic fermentation unit 4, a bedding treatment unit 5, and a bedding application unit 6. The collection and conveying unit 1 is installed in the feeding area 10, and the collection and conveying unit 1 is used to collect and convey cow manure and sewage from the feeding area 10. The solid-liquid separation unit 2 and the circulation reflux unit 3 are located in the separation zone 20. The solid-liquid separation unit 2 is used to separate the collected cow manure and sewage into solid and liquid, forming manure residue and manure liquid. The circulation reflux unit 3 is used to circulate the manure liquid. The aerobic fermentation unit 4 and the bedding material treatment unit 5 are located in the fermentation zone 30. The aerobic fermentation unit 4 is used to perform aerobic fermentation treatment on the manure residue to obtain fermented bedding material. The bedding material treatment unit 5 is used to perform dehumidification and sterilization treatment on the fermented bedding material to obtain dehumidification and sterilization bedding material. The bedding material application unit 6 is located in the application area 40. The bedding material application unit 6 is used for the standardized laying and daily maintenance of the bedding material after dehumidification and sterilization.

[0024] like Figure 1-9As shown, this cow manure recycling system addresses the technical challenges of high moisture content and difficult treatment of cow manure from dairy farms in humid regions. It adopts an overall design concept of "zoning layout, unit collaboration, and closed-loop circulation" to construct a complete process system covering "collection-separation-fermentation-treatment-use-return" of manure.

[0025] Specifically, the cow manure and sewage generated in the feeding area 10 are collected and transported directly and in a targeted manner through the collection and transportation unit 1 set in the feeding area 10. This prevents the manure from absorbing moisture or rainwater from the air due to stagnation in a high-humidity environment, and ensures that the manure enters the subsequent stages with a relatively controllable initial moisture state.

[0026] Next, the solid-liquid separation unit 2, located in the separation zone 20, mechanically separates the collected cow dung and sewage into solid dung residue and liquid dung. At the same time, the circulation and return unit 3 further processes the dung produced by separation, with one part used for internal circulation and the other part transported to the sewage treatment system in accordance with environmental protection requirements, thus achieving efficient utilization and compliant discharge of dung.

[0027] Subsequently, the aerobic fermentation unit 4 in fermentation zone 30 uses high-temperature aerobic fermentation technology as its core to compost the manure residue after solid-liquid separation. By controlling the fermentation temperature and oxygen supply, the degradation of manure residue is accelerated and pathogens are killed. After fermentation, the bedding material treatment unit 5 further dehumidifies and sterilizes the fermented bedding material to ensure that all indicators of the bedding material meet the usage standards.

[0028] Finally, the bedding unit 6, located in the usage area 40, lays the treated bedding on the cow beds according to the specifications and performs daily maintenance. At the same time, it cleans up and recycles the excessively wet bedding generated by the cows' activities and returns it to the separation area 20 to re-enter the treatment process, forming a closed-loop cycle of "manure-bedding-manure" within the farm, achieving zero external discharge of manure and full resource reuse throughout the entire process.

[0029] To further explain, the feeding area 10 includes a plurality of spaced-apart feeding pens 101, which are used to feed dairy cows. Feeding channels 102 are provided between adjacent feeding pens 101. A feeding channel 103 is provided on the side of the feeding pen 101 closest to the feeding channel 102, and a manure scraping channel 104 is provided on the side opposite to the feeding channel 103. The feeding channel 103 and the manure scraping channel 104 are both provided with a groove 105 in the middle, the underground pipe 106 is located in the groove 105, and a collection trough 107 is provided at one end of the feeding channel 103, the manure scraping channel 104 and the underground pipe 106. The collection and conveying unit 1 includes a traction machine 11, a channel scraper 12, and a pipeline scraper 13; The channel scraper 12 is located in the feeding channel 103 and the manure scraping channel 104, and the pipe scraper 13 is located inside the underground pipe 106; The four corners of the feeding pen 101 are provided with corner wheels 14, and the outer wheel surfaces of the four corner wheels 14 are wrapped with chains 15. The traction machine 11 drives the chains 15 to pull the channel scraper 12 and the pipe scraper 13.

[0030] like Figure 3-4 As shown, the feeding area 10 adopts a layout structure of "multi-pen spacing and channel partitioning". Multiple feeding pens 101 are spaced apart to achieve group feeding of dairy cows. Feeding channels 102 between adjacent feeding pens 101 provide dedicated feeding paths for dairy cows. Feeding channels 103 on the side of the feeding pen 101 closest to the feeding channels 102 are used for dairy cows to stand while feeding. The manure scraping channel 104 on the opposite side is dedicated to manure collection. Through functional partitioning of channels, the areas where dairy cows feed and manure are generated are avoided from overlapping, reducing the risk of manure contamination of feed. At the same time, grooves 105 are opened in the middle of the feeding channels 103 and the manure scraping channels 104. Underground pipes 106 are embedded in the grooves 105. One end of all three is connected to the collection trough 107, forming a dedicated flow path for manure and wastewater of "channel-groove 105-pipe-collection trough 107", preventing manure from spreading in the feeding area 10 and causing further increase in moisture.

[0031] The collection and conveying unit 1 consists of a traction machine 11, a channel scraper 12, a pipe scraper 13, corner wheels 14, and a chain 15. The corner wheels 14 at the four corners of the feeding pen 101 change the direction of force on the chain 15, allowing the chain 15 to be arranged along the feeding channel 103, the manure scraping channel 104, and the underground pipe 106. When the traction machine 11 is started, it drives the chain 15 to rotate in a cycle. The chain 15 synchronously drives the channel scraper 12 and the pipe scraper 13 to move. The channel scraper 12 is in contact with the ground of the feeding channel 103 and the manure scraping channel 104 to scrape away the scattered cow manure in the channel in time. The pipe scraper 13 is located inside the underground pipe 106 and pushes the manure and sewage flowing into the pipe in the groove 105. Finally, the cow manure and manure and sewage are transported together to the collection tank 107, completing the precise and synchronous collection of manure and sewage in the feeding area 10. There is no need for manual cleaning of the channel and pipe separately, which greatly improves the efficiency of manure and sewage collection and reduces the intensity of manual labor.

[0032] To further explain, the separation zone 20 includes a primary separation space 201, a secondary separation space 202, and a fecal residue storage space 203; The solid-liquid separation unit 2 includes a conveying pump 21, a stirring separation device 22, a roller pressing separation device 23, a feeding pump 24, and a primary quicklime addition device 25. The conveying pump 21 is connected to the collection tank 107 through a conveying pipe. The conveying pump 21 is used to convey the cow dung and sewage in the collection tank 107 to the primary separation space 201. The stirring separation device 22 is set in the primary separation space 201. The stirring separation device 22 is used to perform primary solid-liquid separation on the cow dung and sewage. The feed pump 24 is provided between the primary separation space 201 and the secondary separation space 202. The two ends of the feed pump 24 are connected to the primary separation space 201 and the secondary separation space 202 through feed pipes. The feed pump 24 is used to transport the fecal residue after primary separation in the primary separation space 201 to the secondary separation space 202. The roller press separation device 23 is provided in the secondary separation space 202. The roller press separation device 23 is used to perform secondary solid-liquid separation on the fecal residue after primary separation. The manure storage space 203 is used to store manure residue after secondary solid-liquid separation. The primary quicklime addition device 25 is installed in the manure storage space 203. The primary quicklime addition device 25 is used to add quicklime to the manure residue after secondary solid-liquid separation and mix it evenly to obtain pretreated manure residue.

[0033] like Figure 5-6 As shown, the separation zone 20 achieves the orderly connection of "graded separation - fecal sludge pretreatment" through spatial division. The primary separation space 201 is used for preliminary separation of fecal liquid, the secondary separation space 202 is used for deep dehydration of fecal sludge, and the fecal sludge storage space 203 is used for fecal sludge pretreatment.

[0034] The conveying pump 21 of the solid-liquid separation unit 2 is connected to the collection tank 107 of the feeding area 10 via a conveying pipeline. When the amount of cow manure and sewage in the collection tank 107 reaches a certain level, the conveying pump 21 starts, conveying the cow manure and sewage to the stirring separation device 22 in the primary separation space 201. The stirring separation device 22 performs primary solid-liquid separation of cow manure and sewage through the dual action of mechanical stirring and filter screen, separating some of the liquid in the sewage and increasing the solid content of the manure residue to about 25%. After the feeding pump 24 between the primary separation space 201 and the secondary separation space 202 starts, it conveys the manure residue after primary separation to the roller pressing separation device 23 in the secondary separation space 202 through the feeding pipeline. The roller pressing separation device 23 adopts a "thick-walled stainless steel mesh roller + high polymer elastic" design. The "sex-body rubber roller" structure design controls the working air pressure at 0.4-0.6 MPa, the extrusion speed at 3-6 cubic meters per hour, and the rotation speed at 9-14 revolutions per minute. Through roller extrusion, the manure residue undergoes secondary solid-liquid separation, minimizing damage to the manure residue fibers while further increasing the solids content to approximately 35%. After secondary separation, the manure residue is temporarily stored in the manure residue storage space 203. A primary quicklime addition device 25, located in this space, adds 60 kg of quicklime to every 6 tons of manure residue at a ratio of 1%. An external stirring device ensures uniform mixing of the quicklime and manure residue. The hygroscopic properties of the quicklime absorb excess moisture from the manure residue, and the heat released from the reaction of quicklime with water initially raises the temperature of the manure residue, laying the foundation for rapid temperature increase in the subsequent aerobic fermentation stage.

[0035] To further explain, both the primary separation space 201 and the secondary separation space 202 are provided with a filtration port 204 at the bottom, and the filtration port 204 is equipped with a filter screen. The other end of the feeding channel 103, the manure scraping channel 104 and the underground pipe 106 are all provided with a backflushing port 108. The circulating reflux unit 3 includes a connecting pipe 31 between the filtrate port 204 and the backflushing port 108. A backflushing pump 32 is provided on the connecting pipe 31. The backflushing pump 32 is used to transport the fecal liquid separated in the primary separation space 201 and the secondary separation space 202 together to the backflushing port 108 to flush the feeding channel 103, the manure scraping channel 104 and the underground pipe 106.

[0036] like Figure 7As shown, both the primary separation space 201 and the secondary separation space 202 of the separation zone 20 have filtrate inlets 204 at their bottoms to collect the fecal liquid generated in the two separation stages. Simultaneously, a backflushing inlet 108 is provided at the other end of the feeding channel 103, the scraping channel 104, and the underground pipe 106, serving as the inlet for fecal liquid circulation backflushing. The circulation backflow unit 3 consists of a connecting pipe 31 and a backflushing pump 32. One end of the connecting pipe 31 is connected to the filtrate inlets 204 of the primary separation space 201 and the secondary separation space 202, and the other end is connected to the backflushing inlet 108. The backflushing pump 32 is installed on the connecting pipe 31. When the system starts the circulation backflow function, the backflushing pump 32 draws the fecal liquid collected in the filtrate inlet 204 and transports it through the connecting pipe 31 to… The manure flows out through the return flushing port 108 and then flows along the ground of the feeding passage 103 and the scraping passage 104, as well as the inner wall of the underground pipe 106, flushing away residual manure in the passages and pipes. For small amounts of cow manure adhering to the ground of the feeding passage 103 and the scraping passage 104, the flow of manure can flush them to the collection tank 107. For any manure clumps that may remain in the underground pipe 106, the impact of the manure can prevent them from clogging the pipes. Finally, the residual manure flushed down is transported together with the manure to the collection tank 107, realizing the recycling of manure and the self-cleaning of the passages and pipes. There is no need to introduce additional clean water for cleaning the passages and pipes, which greatly reduces the consumption of pasture water resources and meets the needs of "efficient use of water resources" in high-humidity areas.

[0037] To further explain, the fermentation zone 30 includes a fermentation tank 302, on which a fermentation material layer is laid; The aerobic fermentation unit 4 includes an aeration pipe 41, a Roots blower 42, an online thermometer and hygrometer 43, and a chain plate turner 44; The aeration pipes 41 are laid alternately along the length and width of the fermentation tank 302 at the bottom of the fermentation tank 302. The aeration pipes 41 have several air outlets in their bodies and are connected to the Roots blower 42. Multiple online temperature and humidity meters 43 are installed at intervals in the fermentation zone 30; The chain plate turning machine 44 operates along the length of the fermentation tank 302. The chain plate turning machine 44 is used to turn over the fermentation material layer and the secondary separated manure residue to form post-fermentation bedding material.

[0038] like Figure 8As shown, the fermentation zone 30 uses two fermentation tanks 302 with a total length of 50 meters as its core carrier. Each fermentation tank 302 has a 2.5-meter inlet / outlet space at both ends. The bottom of the fermentation tank 302 is covered with a 50-centimeter-thick layer of fermentation material, made from a mixture of long straw and fermentation bacteria. The fermentation bacteria are a compound microbial agent with an effective live bacteria count of 2 billion / gram, containing Bacillus, yeast, cellulase, and other components. One kilogram of fermentation bacteria is used for every 40 square meters of fermentation bed, and the fermentation material layer can be used continuously for 3 years. The aeration pipes 41 of the aerobic fermentation unit 4 are laid alternately along the length and width of the fermentation tank 302 at the bottom of the fermentation material layer. Several air outlets are opened in the pipes 41, and they are connected to two Roots blowers 42. Each Roots blower 42 supplies air at a flow rate of 8.93 m³ / min (operating 24 hours on a "supply for 2 hours, stop for 1 hour" cycle). After the Roots blower 42 is started, air passes through the aeration pipes 41... The air vents evenly enter the fermentation material layer, providing sufficient oxygen for the fermentation of manure residue. Multiple online thermometers and hygrometers 43 are installed at intervals in the fermentation zone 30 to monitor the temperature and humidity data of the bedding material in each area in real time. When the monitored temperature is below 65℃, the system alarms and requires manual addition of fermentation bacteria to raise the temperature. When the temperature is above 75℃, the system alarms and requires increasing the number of turnings to ensure that the fermentation temperature is stable in the high-temperature range of 65-75℃. The chain plate turning machine 44 operates along the length of the fermentation tank 302. The height of the chain plate turning machine 44 from the ground is adjusted to about 60 cm. It turns the material 3 times a day, with each turning range of about 2 meters, which fully mixes the manure residue after secondary separation with the fermentation material layer. At the same time, it pushes the bedding material to move about 6 meters a day, so that the manure residue undergoes 6-8 days of high-temperature aerobic fermentation in the fermentation tank 302, and then decomposes to form fermented bedding material. The high temperature during the fermentation process can completely kill pathogens and grass seeds in the manure residue, ensuring that the bedding material is harmless.

[0039] Furthermore, the fermentation zone 30 also includes a bedding material processing space 301, which is used to place the fermented bedding material. The bedding material processing unit 5 includes a secondary quicklime addition device 51 and a high-chlorine bleaching powder mixing device 52; The secondary quicklime addition device 51 and the high-chlorine bleaching powder mixing device 52 are installed in the bedding material treatment space 301; The secondary quicklime addition device 51 is used to add quicklime to the fermented bedding material and mix it evenly to form the primary treated bedding material. The high-chlorine bleaching powder mixing device 52 is used to add high-chlorine bleaching powder to the primary treated bedding material and mix it evenly to form a dehumidified and sterilized bedding material.

[0040] like Figure 8As shown, the bedding material treatment space 301 in the fermentation zone 30 is used to receive the fermented bedding material output from the fermentation tank 302, achieving secondary dehumidification and deep sterilization of the bedding material. The bedding material treatment unit 5 consists of a secondary quicklime addition device 51 and a high-chlorine bleaching powder mixing device 52, both of which are located in the bedding material treatment space 301 and operate in tandem according to the sequence of "adding quicklime first, then adding bleaching powder". When the fermented bedding material enters the bedding material treatment space 301, the secondary quicklime addition device 51 adds quicklime to the bedding material at a ratio of 1.3% (80 kg per 6 tons of bedding material). The quicklime and bedding material are evenly mixed by an external stirring tool. The quicklime absorbs the residual moisture in the bedding material and further increases the temperature of the bedding material. The process involves primary treatment, followed by two days of piling of the treated bedding material to allow the quicklime to fully exert its hygroscopic and bactericidal effects. After piling, a high-chlorine bleaching powder mixing device 52 adds 7.5 kg of high-chlorine bleaching powder per cubic meter of bedding material to the primary-treated material. The mixture is then uniformly mixed again using an external stirring device. The high-chlorine bleaching powder kills any remaining pathogens in the bedding material through chemical action, completing the secondary treatment. The final product is dehumidified and sterilized bedding material with a moisture content of ≤40% and meeting microbiological standards. Simultaneously, during the bedding material treatment process, one ton of dehumidified and sterilized bedding material can be distributed to fermentation tank 302 to achieve the recycling of fermentation bacteria and improve the quantity and activity of bacteria in the front-end fermentation stage.

[0041] To further explain, the usage area 40 includes a plurality of spaced-apart deep pit beds 401; The bedding material usage unit 6 includes a material delivery vehicle 61 and a rotary tillage disinfection machine 62; The material delivery vehicle 61 is used to spread the dehumidified and sterilized bedding material onto the deep pit bed 401; The deep pit bed 401 is used to support the treated bedding material for dairy cows to rest on; The rotary tillage sterilizer 62 is used to tillage and sterilize the bedding material of the deep pit bed 401.

[0042] like Figure 9As shown, the usage area 40 is equipped with multiple deep pit beds 401, serving as the core resting area for dairy cows. It is also equipped with a feed cart 61 and a rotary tiller / sterilizer 62 from the bedding use unit 6 to ensure standardized bedding placement and daily maintenance. After the bedding reaches the required standard after dehumidification and sterilization, the feed cart 61 loads bedding from the bedding processing space 301 and evenly distributes it into each deep pit bed 401 according to a thickness standard of 30-45 cm, providing a soft and dry resting surface for the dairy cows. At a fixed time each day, the rotary tiller / sterilizer 62 enters the usage area 40 to perform a tilling operation on the bedding in each deep pit bed 401. During the tilling process, the rotary blades break up any hardened bedding on the surface of the bed. The process of shredding the bedding increases its permeability and turns the bedding at the bottom of the bedding to the surface, reducing moisture retention at the bottom. In addition, rotary tillage allows the bedding to come into full contact with the air, further killing some residual pathogens through air oxidation, thus achieving daily disinfection of the bedding. During daily maintenance, the moisture level of the bedding in the deep pit bedding 401 is checked regularly. Excessively wet bedding caused by cows trampling or urinating is promptly removed and transported through the manure scraper 104 to the collection trough 107 in the feeding area 10. It then flows back to the separation area 20 along with fresh manure, re-entering the "solid-liquid separation - aerobic fermentation - bedding treatment" process to achieve the recycling of the bedding.

[0043] A method for recycling and utilizing manure from dairy farming in high-humidity areas, applied to the aforementioned manure recycling and utilization system for dairy farming in high-humidity areas, includes the following steps: S1. Manure collection in feeding area 10: Start the tractor 11 to drive the chain 15 to move, which will move the channel scraper 12 and the pipe scraper 13 to simultaneously transport the cow manure in the feeding channel 103 and the manure scraping channel 104, as well as the cow manure and sewage in the underground pipe 106, to the collection tank 107. S2. Graded solid-liquid separation and manure sludge pretreatment: First, the cow manure and sewage in the collection tank 107 are separated into solid and liquid components using a stirring separator 22 to obtain manure sludge with a solid content of 25%; then, the manure sludge after the first separation is separated into solid and liquid components using a roller press separator 23 to obtain manure sludge with a solid content of 35%; quicklime is added to the manure sludge after the second separation at a mass ratio of 1% and stirred evenly to obtain pretreated manure sludge; S3. Fecal liquid circulation treatment: Start the backwash pump 32 to transport the fecal liquid generated by the primary and secondary separation to the backwash port 108 to flush the feeding channel 103, the scraping channel 104 and the underground pipe 106. The remaining fecal liquid is sent to the sewage treatment system. S4. Aerobic fermentation of manure residue: A 50 cm thick layer of fermentation material is laid in the fermentation tank 302. The Roots blower 42 supplies air at a fixed frequency. After the pre-treated manure residue is put into the fermentation tank 302, the chain plate turning machine 44 turns and throws it every day to maintain a fermentation temperature of 65-75℃ for 6-8 days to obtain fermented bedding material. S5. Dehumidification and sterilization of bedding material: Add quicklime to the fermented bedding material at a mass ratio of 1.3% and pile it up for 2 days to form bedding material after primary treatment. Then add high-chlorine bleaching powder to the bedding material after primary treatment at a mass ratio of 7.5 kg / m³ to obtain dehumidification and sterilization bedding material. At the same time, return 1 ton of bedding material to the feed inlet of fermentation tank 302. S6. Bedding material laying and maintenance: The material delivery vehicle 61 spreads the dehumidified and sterilized bedding material to the deep pit bed 401 at a thickness of 30-45cm. The rotary tiller 62 turns the bedding material over daily and regularly cleans up the overly wet bedding material and returns it to the grading solid-liquid separation step. S7. Bedding material quality inspection: Regularly sample and send for testing. If the quality does not meet the standards, return the bedding material to the dehumidification and sterilization step.

[0044] To further explain, in S4, the fermentation material layer is made of a mixture of long rice straw and fermentation bacteria. The amount of fermentation bacteria used is 1 kg per 40 square meters of fermentation bed, and the effective live bacteria count is 2 billion / gram. The components include Bacillus, yeast, and cellulase.

[0045] To further explain, in S4, when the fermentation temperature is below 65°C, add fermentation bacteria; when the fermentation temperature is above 75°C, increase the number of times the mixture is turned.

[0046] Step S1 mainly involves the collection of manure from the feeding area: First, the feeding area 10 adopts a layout of "multi-pen spacing and channel partitioning." The feeding channel 102 between adjacent feeding pens 101 and the feeding channel 103 and manure scraping channel 104 on both sides of the feeding pen 101 form functional zones, which can avoid the overlap between the dairy cows' feeding area and the manure generation area, reducing the possibility of manure contaminating the feed and additional water absorption. This step relies on the mechanical linkage structure of the manure collection and conveying unit 1. After the traction machine 11 is started, the power output by the traction machine 11 drives the chain 15, which is mounted on the outer wheel surface of the corner wheels 14 at the four corners of the feeding pen 101, to rotate in a cycle. The corner wheels 14 change the direction of force on the chain 15, so that the chain can be adapted to the ground direction of the feeding channel 103 and the manure scraping channel 104 and the inner wall direction of the underground pipe 106. When the chain operates, it simultaneously drives two types of scrapers: first, the channel scraper 12 located in the feeding channel 103 and the manure scraping channel 104, which slides against the channel floor to scrape away cow manure scattered during cow activity, preventing it from accumulating on damp ground and absorbing moisture from the air; second, the pipe scraper 13 located inside the underground pipe 106, which fits tightly against the pipe wall to push the wastewater flowing into the pipe from the groove 105 between the feeding channel 103 and the manure scraping channel 104, preventing wastewater from accumulating in the pipe. Finally, the cow manure scraped by the channel scraper 12 and the wastewater pushed by the pipe scraper 13 are transported together by the chain 15 to the collection tank 107, which is shared by the feeding channel 103, the manure scraping channel 104, and the underground pipe 106, achieving the effect of "simultaneous solid-liquid collection and real-time drying of manure in the feeding area 10," controlling the initial moisture content of the manure from the source and reducing the burden on subsequent processing stages.

[0047] Step S2 mainly involves graded solid-liquid separation and pretreatment of manure sludge: Addressing the high moisture content of manure in humid regions, a combined process of "graded separation + pretreatment" is used to gradually reduce the moisture content of the manure sludge and enhance its composting potential. This process is divided into three stages: The first stage is a solid-liquid separation process: the manure (including cow dung and sewage) in the collection tank 107 is transported to the stirring separation device 22 via the conveying pump 21 and conveying pipeline. This device uses the dual effects of mechanical stirring and filter screen filtration. The mechanical stirring can break up the clumps of cow dung in the manure to avoid clogging the filter screen of the filtrate outlet 204, and at the same time accelerate the separation of the solid and liquid phases in the manure. The filter screen intercepts solid particles in the manure, allowing some free liquid to permeate through the filter screen to the filtrate outlet 204 at the bottom of the primary separation space and be discharged. Finally, a primary manure residue with a solid content of about 25% is obtained, which initially reduces the overall moisture load of the manure.

[0048] The second stage is the secondary solid-liquid separation stage: the primary manure residue after the primary separation is transported to the roller-type separator 23 through the feed pump 24 and feed pipe. This device adopts a special structure of "thick-walled stainless steel mesh roller + high-polymer elastomer rubber roller". Under the parameters of working air pressure 0.4-0.6MP, extrusion speed 3-6 cubic meters / hour, and rotation speed 9-14 rpm, the primary manure residue is deeply dehydrated by the relative extrusion action of the mesh roller and the rubber roller. During the extrusion process, the interstitial water in the manure residue is squeezed out and flows into the filtrate outlet at the bottom of the secondary separation space through the mesh of the mesh roller. At the same time, the segmented design of the high-polymer elastomer rubber roller can effectively disperse the extrusion stress and avoid excessive breakage of the manure residue fibers. Finally, a secondary manure residue with a solid content increased to 35% is obtained, which further reduces the moisture pressure in the subsequent fermentation stage.

[0049] Finally, the pretreatment stage of the manure residue: After the secondary manure residue is transported to the manure residue storage space 203, quicklime is added at a mass ratio of 1% (60 kg for every 6 tons of manure residue). An external stirring device is used to achieve uniform mixing of the quicklime and manure residue. Quicklime has strong hygroscopic properties, which can quickly absorb residual free moisture in the manure residue; at the same time, the chemical reaction between quicklime and water releases heat, which can initially raise the temperature of the manure residue, creating favorable conditions for rapid temperature rise in the subsequent aerobic fermentation stage. In addition, the alkaline environment of quicklime can also initially inhibit the activity of pathogenic microorganisms in the manure residue, thus completing the pretreatment of the manure residue.

[0050] Step S3 mainly involves the sewage recycling process: it focuses on the "resource utilization + compliant treatment" of sewage generated during the separation process, and constructs a differentiated treatment path for sewage.

[0051] The manure collected at the bottom filter ports 204 of the primary separation space 201 and the secondary separation space 202 is converged at the inlet of the backwash pump 32 through the connecting pipe 31. After the backwash pump 32 is started, the manure is pressurized and transported to the backwash port 108, which is jointly provided at the other end of the feeding channel 103, the scraping channel 104, and the underground pipe 106. After flowing out of the backwash port 108, the manure flows along the ground of the feeding channel 103 and the scraping channel 104 and the inner wall of the underground pipe 106, forming a continuous liquid flow flushing effect: for a small amount of residual cow manure adhering to the ground of the channel, the liquid flow can flush it to the collection tank 107, preventing the residual manure from deteriorating and smelling bad in a humid environment; for manure particles that may accumulate in the underground pipe 106, the impact force of the liquid flow can prevent them from caking and clogging the pipe, ensuring the smooth flow of the channel and the pipe. The remaining manure that is not flushed is transported to the sewage treatment system for further treatment. After meeting the standards, it is discharged or reused, which not only realizes the resource recycling of manure and reduces the consumption of clean water, but also avoids the direct discharge of manure and causes environmental pollution, while ensuring the smooth flow of manure collection paths in the breeding area.

[0052] Step S4 mainly involves the aerobic fermentation process of the manure residue: Centered on "high-temperature aerobic fermentation," and relying on the structural design and equipment coordination of fermentation tank 302, it achieves the harmless decomposition of the manure residue, specifically divided into four stages: The first step is the construction of the fermentation material layer: a 50 cm thick fermentation material layer is laid in the fermentation tank 302. This material layer is made of long rice straw mixed with specific fermentation bacteria. The long rice straw has a loose and porous structure, which can provide good ventilation space for fermentation, and at the same time, it serves as an organic carbon source to provide nutrients for microbial reproduction. The fermentation bacteria are added at a dosage of 1 kg per 40 square meters of fermentation bed, with an effective live bacteria count of 20 billion / gram. The components include Bacillus (which can efficiently decompose organic matter such as proteins and fats in manure residue), yeast (which can promote the maturation of organic matter and produce metabolites to regulate the fermentation environment), and cellulase (which can degrade cellulose in long rice straw and manure residue, improving fermentation efficiency). The three work together to construct a highly efficient microbial degradation system.

[0053] The next step is maintaining the aerobic environment: In the fermentation tank 302, φ110 aeration pipes 41 are laid alternately along the length and width of the bottom. Several air outlets are opened in the pipes, connecting to two Roots blowers 42 with an air supply flow rate of 8.93 cubic meters per minute. The Roots blowers 42 operate 24 hours a day on a "2 hours of air supply, 1 hour of shutdown" cycle, delivering air to the aeration pipes 41. The air is evenly diffused into the fermentation material layer through the air outlets, providing sufficient oxygen for the aerobic respiration of microorganisms and preventing the production of malodorous gases such as methane and hydrogen sulfide through localized anaerobic conditions in the fermentation material layer. Simultaneously, it maintains the loose state of the fermentation system.

[0054] Next comes the turning and temperature control process: The pre-treated manure residue is fed into the fermentation tank 302 through the inlet at the front end. After mixing with the fermentation material layer, the chain plate turning machine 44, 60 cm above the ground, is activated, turning the residue three times daily along the length of the fermentation tank 302, with each turning covering approximately 2 meters. This turning action ensures uniform mixing of the manure residue with the fermentation material layer and microorganisms, guaranteeing even decomposition. It also moves the bedding material approximately 6 meters daily, allowing the manure residue to move sequentially within the fermentation tank 302 for continuous fermentation. Simultaneously, online thermometers and hygrometers 43 installed at the front, middle, and rear sections of the fermentation tank 302 monitor the bedding material temperature in real time. When the temperature drops below 65℃, fermentation bacteria are manually added to replenish the microorganisms and increase fermentation activity to raise the temperature. When the temperature exceeds 75℃, the turning frequency is increased to dissipate heat and prevent the high temperature from killing beneficial microorganisms, ultimately stabilizing the fermentation temperature within the highly efficient sterilization range of 65-75℃.

[0055] Finally, the composting process is completed: Under high temperature and aerobic conditions, fermentation bacteria multiply rapidly and decompose the organic matter in the manure residue. The composting process is completed within 6-8 days. During this period, the high temperature can completely kill pathogens such as fecal coliforms and Salmonella in the manure residue, as well as grass seeds, forming harmless fermented bedding.

[0056] Step S5 mainly involves the dehumidification and sterilization of the bedding material: Addressing any residual moisture and pathogenic microorganisms in the fermented bedding, a phased treatment process combining physical dehumidification and chemical sterilization is used to ensure the bedding meets the standards for cattle bedding while simultaneously guaranteeing the recycling of fermentation bacteria. The first stage is dehumidification and sterilization: After fermentation, the bedding material is transported to bedding treatment space 301, where quicklime is added at a mass ratio of 1.3% (80 kg per 6 tons of bedding material). After uniform mixing using a specialized mixing device, the bedding is piled up for 2 days. The quicklime continues to absorb residual moisture from the bedding material, further reducing its moisture content to below 40%. Simultaneously, the heat released by the quicklime raises the temperature of the bedding material again. Combined with its alkaline environment, this further kills any remaining pathogenic microorganisms that may have survived the fermentation process, resulting in bedding material after primary treatment.

[0057] The second stage is the secondary sterilization: After the initial treatment, the bedding material is piled up for 2 days, and then 7.5 kg of high-chlorine bleaching powder is added per cubic meter, which is then uniformly mixed using a high-chlorine bleaching powder mixing device 52. The hypochlorous acid released after the high-chlorine bleaching powder dissolves has strong oxidizing properties, which can completely kill any remaining pathogenic microorganisms (such as Staphylococcus aureus, mold, etc.) in the bedding material, ensuring that the microbial indicators of the bedding material meet the standards, thus forming a dehumidified and sterilized bedding material.

[0058] Finally, the inoculum return stage: After the secondary sterilization is completed, 1 ton of dehumidified and sterilized bedding material is returned to the feeding space of fermentation tank 302. This part of the bedding material contains a large number of surviving fermentation bacteria, which can be used as "seed bacteria" to supplement the number of microorganisms in fermentation tank 302, improve the activity of the microbial community in the front fermentation stage, ensure stable fermentation temperature, reduce the amount of fermentation agent added, and reduce processing costs.

[0059] Step S6 mainly involves the bedding installation and maintenance process: focusing on the "standardized use + cyclical maintenance" of the bedding to ensure that the bedding continuously meets the resting needs of the dairy cows, while also enabling the reuse of excessively wet bedding. The first step is the bedding preparation: The feed truck 61 is started to load the dehumidified and sterilized bedding. Based on the dimensions of the deep pit bedding 401 and the cows' resting needs, the bedding is evenly spread into the bedding to a thickness of 30-45 cm. This thickness of bedding provides sufficient softness to meet the cows' comfort needs while resting, and also provides some support to prevent the cows from sinking into the bedding and restricting their movement.

[0060] Secondly, there is the routine maintenance process: the rotary tiller 62 is started every day to till the bedding of the deep pit bedding 401. The rotary tiller blades can break up the compacted bedding on the surface of the bedding caused by the cows trampling, restore the loose structure of the bedding, increase the air permeability of the bedding, and reduce the retention of moisture at the bottom of the bedding. At the same time, the tilling process can make full contact between the bedding and the air, and further kill some of the remaining pathogenic microorganisms through air oxidation, so as to achieve daily disinfection of the bedding and reduce the incidence of diseases such as mastitis in dairy cows.

[0061] Finally, the recycling process involves regularly checking the moisture level of the bedding in the deep pit bed 401. Any excessively wet bedding caused by cow urine or trampling is promptly removed and transported through the manure scraper to the collection trough in the feeding area. There, it enters the S2 graded solid-liquid separation step along with fresh manure for further separation, fermentation, and treatment. This process ensures the full life cycle recycling of the bedding, preventing the discharge of excessively wet bedding that could cause environmental pollution, and reducing the need for fresh bedding replenishment.

[0062] Step S7 primarily concerns the safe use of bedding: Through a mechanism of "regular sampling + third-party testing + reprocessing of non-compliant batches," it ensures that each batch of bedding meets usage standards. Monthly, bedding samples are randomly selected from multiple deep pit bedding units (401) and sent to a qualified third-party professional testing institution. Testing is conducted according to a quantitative standard table: "Moisture ≤ 40%, fecal coliforms ≤ 300 MPN / g, Staphylococcus aureus not detectable, mold ≤ 4000 CFU / g, Salmonella not detectable." Moisture content ensures the bedding is soft and free from mold, while microbial indicators completely block the transmission of pathogens to dairy cows through the bedding. If the test results are substandard, it indicates deficiencies in the dehumidification or sterilization process. This batch of bedding must be returned to the S5 bedding dehumidification and sterilization step, undergoing repeated quicklime addition, stacking, and high-chlorine bleaching powder mixing treatment until the test results meet the standards before being used again. This forms a closed-loop control system for bedding quality, ensuring biosecurity in dairy farming.

[0063] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A system for recycling and utilizing manure from dairy farms in high-humidity areas, characterized in that, It includes a collection and conveying unit (1), a solid-liquid separation unit (2), a circulation and reflux unit (3), an aerobic fermentation unit (4), a bedding material treatment unit (5), and a bedding material usage unit (6); The collection and conveying unit (1) is located in the feeding area (10) and is used to collect and convey cow manure and sewage from the feeding area (10). The solid-liquid separation unit (2) and the circulation reflux unit (3) are located in the separation zone (20). The solid-liquid separation unit (2) is used to separate the collected cow manure and sewage into solid and liquid, forming manure residue and manure liquid. The circulation reflux unit (3) is used to circulate the manure liquid. The aerobic fermentation unit (4) and the bedding material treatment unit (5) are set in the fermentation zone (30). The aerobic fermentation unit (4) is used to perform aerobic fermentation treatment on the manure residue to obtain fermented bedding material. The bedding material treatment unit (5) is used to perform dehumidification and sterilization treatment on the fermented bedding material to obtain dehumidified and sterilized bedding material. The bedding material use unit (6) is set in the use area (40). The bedding material use unit (6) is used for the standardized laying and daily maintenance of the bedding material after dehumidification and sterilization.

2. The dairy manure recycling system for high-humidity areas according to claim 1, characterized in that, The feeding area (10) includes a plurality of spaced-apart feeding pens (101), which are used to feed dairy cows. Feeding channels (102) are provided between adjacent feeding pens (101). A feeding channel (103) is provided on the side of the feeding pen (101) closest to the feeding channel (102), and a manure scraping channel (104) is provided on the side opposite to the feeding channel (103). The feeding channel (103) and the manure scraping channel (104) are both provided with a groove (105) in the middle, and the underground pipe (106) is located in the groove (105). A collection trough (107) is provided at one end of the feeding channel (103), the manure scraping channel (104) and the underground pipe (106). The collection and conveying unit (1) includes a traction machine (11), a channel scraper (12), and a pipeline scraper (13). The channel scraper (12) is located in the feeding channel (103) and the manure scraping channel (104), and the pipe scraper (13) is located inside the underground pipe (106); The four corners of the feeding pen (101) are provided with corner wheels (14), and the outer surfaces of the four corner wheels (14) are wrapped with chains (15). The traction machine (11) drives the chains (15) to pull the channel scraper (12) and the pipe scraper (13).

3. The dairy manure recycling system for high-humidity areas according to claim 2, characterized in that, The separation zone (20) includes a primary separation space (201), a secondary separation space (202), and a fecal residue storage space (203). The solid-liquid separation unit (2) includes a conveying pump (21), a stirring separation device (22), a roller pressing separation device (23), a feeding pump (24), and a primary quicklime addition device (25). The conveying pump (21) is connected to the collection tank (107) through a conveying pipe. The conveying pump (21) is used to convey the cow manure and sewage in the collection tank (107) to the primary separation space (201). The stirring separation device (22) is installed in the primary separation space (201). The stirring separation device (22) is used to perform primary solid-liquid separation on the cow manure and sewage. The feed pump (24) is provided between the primary separation space (201) and the secondary separation space (202). The two ends of the feed pump (24) are connected to the primary separation space (201) and the secondary separation space (202) through feed pipes. The feed pump (24) is used to transport the fecal residue after primary separation in the primary separation space (201) to the secondary separation space (202). The roller press separator (23) is set in the secondary separation space (202). The roller press separator (23) is used to perform secondary solid-liquid separation on the fecal residue after primary separation. The manure storage space (203) is used to store manure residue after secondary solid-liquid separation. The primary quicklime addition device (25) is set in the manure storage space (203). The primary quicklime addition device (25) is used to add quicklime to the manure residue after secondary solid-liquid separation and mix it evenly to obtain pretreated manure residue.

4. A dairy manure recycling system for high-humidity areas according to claim 3, characterized in that, Both the primary separation space (201) and the secondary separation space (202) are provided with a filtration port (204) at the bottom, and the filtration port (204) is equipped with a filter screen. The other end of the feeding channel (103), the manure scraping channel (104) and the underground pipe (106) are provided with a flushing port (108). The circulating reflux unit (3) includes a connecting pipe (31) between the filtrate port (204) and the backflushing port (108). A backflushing pump (32) is provided on the connecting pipe (31). The backflushing pump (32) is used to transport the fecal liquid separated in the primary separation space (201) and the secondary separation space (202) together to the backflushing port (108) to flush the feeding channel (103), the manure scraping channel (104) and the underground pipe (106).

5. A dairy manure recycling system for high-humidity areas according to claim 3, characterized in that, The fermentation zone (30) includes a fermentation tank (302) on which a fermentation material layer is laid; The aerobic fermentation unit (4) includes an aeration pipe (41), a Roots blower (42), an online thermometer and hygrometer (43), and a chain plate turner (44). The aeration pipe (41) is laid alternately along the length and width of the fermentation tank (302) at the bottom of the fermentation tank (302). The aeration pipe (41) has several air outlets and is connected to the Roots blower (42). Multiple online thermometers (43) are installed at intervals in the fermentation zone (30); The chain plate turning machine (44) operates along the length of the fermentation tank (302) and is used to turn over the fermentation material layer and the secondary separated manure residue to form fermented bedding material.

6. A dairy manure recycling system for high-humidity areas according to claim 5, characterized in that, The fermentation zone (30) also includes a bedding material processing space (301), which is used to place fermented bedding material. The bedding material processing unit (5) includes a secondary quicklime addition device (51) and a high-chlorine bleaching powder mixing device (52). The secondary quicklime addition device (51) and the high-chlorine bleaching powder mixing device (52) are located in the bedding material treatment space (301). The secondary quicklime addition device (51) is used to add quicklime to the fermented bedding material and mix it evenly to form the bedding material after primary treatment; The high-chlorine bleaching powder mixing device (52) is used to add high-chlorine bleaching powder to the primary treated bedding material and mix it evenly to form a dehumidified and sterilized bedding material.

7. A dairy manure recycling system for high-humidity areas according to claim 6, characterized in that, The usage area (40) includes multiple spaced-apart deep pit beds (401); The bedding material use unit (6) includes a material delivery vehicle (61) and a rotary tillage sterilizer (62). The material delivery vehicle (61) is used to scatter the dehumidified and sterilized bedding material onto the deep pit bed (401). The deep pit bed (401) is used to hold the treated bedding material for dairy cows to rest on; The rotary tillage sterilizer (62) is used to tillage and sterilize the bedding material of the deep pit bed (401).

8. A method for recycling and utilizing cow manure from dairy farming in high-humidity areas, characterized in that, The system for recycling and utilizing manure from dairy farms in high-humidity areas, as described in any one of claims 1-7, comprises the following steps: S1. Collection of manure in feeding area (10): Start the tractor (11) to drive the chain (15) to move, and move the channel scraper (12) and pipe scraper (13) to transport the cow manure in the feeding channel (103) and manure scraping channel (104) and the cow manure and sewage in the underground pipe (106) to the collection tank (107). S2, graded solid-liquid separation and manure pretreatment: First, the cow manure and sewage in the collection tank (107) are separated into solid and liquid by a stirring separator (22) to obtain manure with a solid content of 25%; then, the manure after the first separation is separated into solid and liquid by a roller separator (23) to obtain manure with a solid content of 35%; quicklime is added to the manure after the second separation at a mass ratio of 1% and stirred evenly to obtain pretreated manure; S3, Fecal liquid circulation treatment: Start the backwash pump (32) to transport the fecal liquid generated by the primary and secondary separation to the backwash port (108) to flush the feeding passage (103), the scraping passage (104) and the underground pipe (106), and send the remaining fecal liquid to the sewage treatment system; S4. Aerobic fermentation of manure residue: A 50 cm thick layer of fermentation material is laid in the fermentation tank (302). The Roots blower (42) supplies air at a fixed frequency. After the pre-treated manure residue is put into the fermentation tank (302), the chain plate turning machine (44) turns it over every day to maintain a fermentation temperature of 65-75℃ for 6-8 days to obtain fermented bedding material. S5. Dehumidification and sterilization of bedding material: Add quicklime to the fermented bedding material at a mass ratio of 1.3% and pile it up for 2 days to form bedding material after primary treatment. Then add high-chlorine bleaching powder to the bedding material after primary treatment at a mass ratio of 7.5 kg / m³ to obtain dehumidification and sterilization bedding material. At the same time, return 1 ton of bedding material to the feed inlet of the fermentation tank (302). S6. Bedding material laying and maintenance: The material delivery vehicle (61) spreads the dehumidified and sterilized bedding material to the deep pit bed (401) with a thickness of 30-45cm. The rotary tiller (62) tills the bedding material daily and cleans the overly wet bedding material regularly to return it to the graded solid-liquid separation step. S7. Bedding material quality inspection: Regularly sample and send for testing. If the quality does not meet the standards, return the bedding material to the dehumidification and sterilization step.

9. A method for recycling and utilizing cow manure from dairy farming in high-humidity areas according to claim 8, characterized in that, In S4, the fermentation material layer is made of a mixture of long rice straw and fermentation bacteria. The amount of fermentation bacteria used is 1 kg per 40 square meters of fermentation bed, and the effective live bacteria count is 2 billion / gram. The components include Bacillus, yeast, and cellulase.

10. A method for recycling and utilizing cow manure from dairy farming in high-humidity areas according to claim 9, characterized in that, In S4, fermentation bacteria are added when the fermentation temperature is below 65°C, and the number of turnings is increased when the fermentation temperature is above 75°C.

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