Livestock breeding excrement treatment and recovery device

Abstract

The application discloses a livestock breeding excrement treatment and recovery device, which comprises a controller, a pretreatment module electrically connected with the controller, a biological conversion cabin, a separation assembly and an environmental regulation module; the pretreatment module comprises a feeding bin in a cylindrical structure, a feces feeding port and an auxiliary material feeding port are arranged at the top of the feeding bin, a crushing mechanism is arranged in the feeding bin, a guide pipe is arranged at the bottom of the feeding bin, and the guide pipe is connected with the biological conversion cabin; the biological conversion cabin comprises a shell, a door body is arranged on the shell, an observation window is arranged on the door body, at least three layers of storage trays are arranged in the shell, adjacent storage trays are connected through columns, the columns penetrate through the storage trays, one end of the column away from the storage tray is connected with the top of the shell, and a separation bin is arranged at the bottom of the shell; the separation assembly comprises a fan, an interception box and a storage box arranged in the separation bin. The device realizes efficient harmless treatment and resource recycling of livestock breeding excrement.

Description

Technical Field

[0001] This invention relates to the field of livestock breeding pollution control technology, specifically to a livestock breeding manure treatment and recycling device. Background Technology

[0002] With the current trend of large-scale and intensive development in livestock farming, the large amount of manure generated during the process has become a prominent challenge in the field of ecological and environmental protection. Livestock manure is rich in organic matter, nitrogen, phosphorus, and other nutrients. If discharged directly without effective treatment, it will not only pollute the soil, water bodies, and atmosphere, leading to a series of ecological problems such as soil compaction, eutrophication, and declining air quality, but also waste resources, contradicting the current development concepts of green development and a circular economy. Against this backdrop, utilizing biotransformation technology to achieve the harmless treatment and resource recovery of manure has become one of the core directions for livestock pollution control, leading to the development of livestock manure treatment and recovery devices.

[0003] Existing livestock manure treatment and recycling devices rely on biotransformation technologies such as black soldier flies to decompose and process livestock manure, simultaneously achieving the recycling and reuse of manure residue and the resource recovery of black soldier flies. Black soldier flies, as highly efficient saprophytic insects, are characterized by rapid reproduction, large food intake, and high conversion efficiency. During their growth, they can efficiently decompose organic matter in manure, converting it into their own biomass (high-protein feed raw material) and insect excrement (high-quality organic fertilizer raw material), thus turning manure into a valuable resource. Therefore, they serve as the core biotransformation carrier for these devices. However, existing livestock manure treatment and recycling devices still have many shortcomings in practical applications.

[0004] In terms of spatial structure design, some existing processing and recycling devices have a simple internal storage structure, which restricts the activity range of black soldier flies. Feces tend to accumulate in the storage area, forming localized dense layers, making it difficult for black soldier flies to freely move between different areas and to fully contact and feed on the feces. This not only leaves some feces in an undecomposed state for extended periods, reducing overall fecal treatment efficiency, but may also lead to the production of harmful gases due to incomplete fermentation of localized feces, affecting the black soldier fly's living environment and further exacerbating the problem of incomplete fecal treatment.

[0005] Regarding separation and recycling efficiency, existing black soldier fly larvae separation methods from manure residue in some processing and recycling devices are relatively crude, mainly relying on traditional screening or manual sorting. Traditional screening methods can only separate materials with large particle size differences, and are difficult to effectively separate small residues similar in size to black soldier flies or adhering to their surface. Manual sorting suffers from low efficiency, high labor intensity, and high separation costs, and cannot achieve large-scale separation operations. Neither of these separation methods can achieve a complete separation of black soldier flies from manure residue, which not only affects the purity of black soldier flies as feed raw materials but also reduces the quality of manure residue as organic fertilizer, thus limiting the economic value of resource recovery.

[0006] Regarding the precision of environmental control, the growth and reproduction of black soldier flies have strict requirements for temperature, humidity, oxygen content, and light conditions. Suitable environmental conditions are crucial for ensuring their efficient decomposition of excrement and rapid reproduction. Existing treatment and recycling devices often have rudimentary environmental control systems, employing only single temperature and humidity control elements and lacking closed-loop control mechanisms. Temperature control relies heavily on simple heating elements, and humidity regulation often uses spray-type humidification, resulting in significant fluctuations in temperature and humidity within the chamber. It is difficult to stably maintain these within the 25-30℃ temperature range and 60-70%RH humidity range required for black soldier fly growth. Simultaneously, some devices lack effective aeration and light regulation components. Insufficient oxygen content and light conditions that do not match the growth rhythm of black soldier flies directly affect their metabolic efficiency and reproductive rate, leading to prolonged excrement treatment cycles and potentially causing mass mortality of black soldier flies, severely impacting the stable operation and treatment effectiveness of the device.

[0007] In summary, the existing livestock manure treatment and recycling devices have shortcomings in terms of structural design, separation efficiency, and environmental control, which can no longer meet the current needs of large-scale livestock manure treatment for high efficiency and resource utilization. There is an urgent need to develop a manure treatment and recycling device with optimized structure, high separation efficiency, and precise environmental control to solve the industry's development problems and promote the high-quality development of livestock pollution control and resource recycling industry. Summary of the Invention

[0008] In view of the above-mentioned shortcomings in the prior art, the present invention provides a livestock manure treatment and recycling device that solves the problems of incomplete manure treatment due to the simple storage structure, low purity of resource recovery due to the crude separation method, and the rudimentary environmental control system that makes it difficult to stabilize the growth conditions of black soldier fly larvae.

[0009] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows: a livestock manure treatment and recycling device, comprising a controller, a pretreatment module electrically connected to the controller, a bioconversion chamber, a separation component, and an environmental control module;

[0010] The pretreatment module includes a feeding hopper, which is a cylindrical structure. The top of the feeding hopper is equipped with a manure inlet and an auxiliary material inlet. The inside of the feeding hopper is equipped with a crushing mechanism, and the bottom of the feeding hopper is equipped with a guide pipe that is connected to the bioconversion chamber.

[0011] The biotransformation chamber includes a shell, a door on the shell, an observation window on the door, at least three layers of storage trays inside the shell, adjacent storage trays are connected by a column that penetrates through the storage trays, the end of the column away from the storage tray is connected to the top of the shell, and a separation chamber is set at the bottom of the shell.

[0012] The separation assembly includes a fan, an interception box, and a storage box installed in the separation chamber;

[0013] The environmental control module includes a temperature and humidity sensor, an electric heating element, a humidifier, and an aeration assembly, all housed inside the casing.

[0014] Furthermore, in the above-mentioned livestock manure treatment and recycling device, the aeration component includes an aerator and an aeration head disposed inside the shell, with the aerator and the aeration head connected by an aeration pipe.

[0015] Furthermore, in the above-mentioned livestock manure treatment and recycling device, the storage tray includes a screen and a receiving tray located below the screen. A receiving pipe is located below the receiving tray, and the end of the receiving pipe away from the receiving tray is connected to a separation component. Positioning pin holes for the initial position and separation position are provided on the column corresponding to each layer of screen. Positioning pins are provided on the positioning pin holes. A curved part is provided on the top of the column. A first rotary motor is provided at the end of the curved part away from the storage tray. The first rotary motor is located on the top of the housing.

[0016] Furthermore, the environmental control module of the above-mentioned livestock manure treatment and recycling device also includes a light adjustment component, which consists of at least two LED light sources and is evenly distributed inside the top of the housing.

[0017] Furthermore, the above-mentioned livestock manure treatment and recycling device includes a crushing mechanism comprising a second rotary motor located at the bottom of the feed hopper, a rotary shaft fixedly connected to the second rotary motor, and crushing blades mounted on the rotary shaft.

[0018] Furthermore, in the aforementioned livestock manure treatment and recycling device, the screen mesh size is smaller than that of the black soldier fly.

[0019] Furthermore, the aforementioned livestock manure treatment and recycling device is equipped with a fluid pump on the feed pipe.

[0020] Furthermore, in the aforementioned livestock manure treatment and recycling device, the bottom of the receiving tray is inclined.

[0021] Furthermore, the above-mentioned livestock manure treatment and recycling device has two rotating shafts arranged in parallel, with 8-12 crushing blades on each rotating shaft.

[0022] Furthermore, the above-mentioned livestock manure treatment and recycling device has a removable splash guard at the edge of the manure inlet.

[0023] The beneficial effects of this invention are as follows: the bioconversion chamber is equipped with at least three layers of storage trays, combined with a column-driven rotating screen structure, which significantly expands the activity space of the black soldier fly and the contact area with the material. The rotating function keeps the material constantly turning over, allowing the black soldier fly to freely move through the feces and waste, fully feed on and decompose the feces and waste, and avoid the problem of localized accumulation of untreated feces and waste.

[0024] The system employs a dual separation mode of "centrifugal screening + airflow separation". First, the residual waste, insect sand and black soldier flies are initially separated by a high-speed rotating screen. Then, the directional airflow generated by the blower blows the black soldier flies toward the interception box according to the density difference, thus completely separating the small amount of residual material.

[0025] The environmental control module integrates temperature and humidity sensors, electric heating elements, humidifiers, aeration components, and light regulation components to form a closed-loop control system that perfectly matches the growth and reproduction needs of black soldier flies.

[0026] The design of dual rotating shafts and staggered serrated pulverizing blades can break down manure into fine particles with a diameter of less than 5 mm, while simultaneously achieving uniform mixing of manure and auxiliary materials, improving the material's permeability and looseness, and providing suitable conditions for black soldier fly larvae to feed and metabolize. The fluid pump on the feed pipe can precisely adjust the feed flow rate to ensure uniform material distribution in each storage tray. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the internal structure of the device;

[0028] Figure 2 This is a schematic diagram of the external structure of the device;

[0029] Figure 3 This is a schematic diagram of the internal structure of the biotransformation chamber;

[0030] Figure 4 This is a schematic diagram of the storage tray structure during the screening stage;

[0031] Figure 5 This is a schematic diagram of the structure of the first rotary motor and the bent part;

[0032] The components are as follows: 1. Feed hopper, 2. Manure inlet, 3. Auxiliary material inlet, 4. Guide pipe, 5. Shell, 6. Door, 7. Storage tray, 8. Column, 9. Separation bin, 10. Fan, 11. Interception box, 12. Storage box, 13. Temperature and humidity sensor, 14. Electric heating element, 15. Humidifier, 16. Aerator, 17. Aeration head, 18. Aeration pipe, 19. Screen, 20. Receiving tray, 21. Receiving pipe, 22. Positioning pin, 23. Bending part, 24. First rotating motor, 25. LED light source, 26. Rotating shaft, 27. Crushing blade, 28. Fluid pump, 29. Observation window, 30. Positioning pin hole. Detailed Implementation

[0033] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0034] like Figures 1-5 As shown, this embodiment provides a livestock manure treatment and recycling device, including a pretreatment module, a bioconversion chamber, a separation component, and an environmental control module that are interconnected.

[0035] The pretreatment module, as the front-end processing unit of the device, is responsible for crushing and mixing the raw manure to provide suitable material conditions for the subsequent bioconversion process. The pretreatment module includes a feeding hopper 1, which is a cylindrical structure 8. The top of the feeding hopper 1 is equipped with a manure inlet 2 and an auxiliary material inlet 3. The inside of the feeding hopper 1 is equipped with a crushing mechanism, and the bottom of the feeding hopper 1 is equipped with a guide pipe 4, which is connected to the bioconversion chamber.

[0036] The feeding hopper 1 is welded from 304 stainless steel, and the inner wall is polished to a smooth, burr-free surface, effectively preventing fecal matter from sticking and facilitating cleaning. The top of the feeding hopper 1 has two inlets: a fecal matter inlet 2 and a supplementary material inlet 3. The edge of the fecal matter inlet 2 is equipped with a removable splash guard to prevent fecal matter from splashing out during feeding, keeping the operating environment clean. The supplementary material inlet 3 is equipped with a sealing cap, which is threaded to the inlet to maintain a sealed interior when no supplementary material is being fed, preventing odor leakage.

[0037] The crushing mechanism is located at the bottom of the feeding hopper 1 and mainly consists of a second rotary motor, a rotating shaft 26, and crushing blades 27. It is used to crush the raw manure into small particles with a diameter of less than 5 mm, while simultaneously achieving preliminary mixing of the manure with auxiliary materials. The second rotary motor is bolted to a motor mounting base at the bottom of the feeding hopper 1. The motor mounting base is made of welded steel plate and is tightly connected to the hopper body to ensure the stability of the motor during operation.

[0038] Two rotating shafts 26 are provided and installed in parallel inside the feed hopper 1. Their surfaces are heat-treated, providing good wear resistance and torsional strength. The end of each rotating shaft 26 is connected to the inner wall of the feed hopper 1 via a bearing, featuring high load-bearing capacity, high rotational accuracy, and a low coefficient of friction, ensuring flexible rotation of the shaft 26. The two rotating shafts 26 rotate in opposite directions and achieve synchronous operation through a gear transmission mechanism.

[0039] In this embodiment, 10 pulverizing blades 27 are evenly arranged on each rotating shaft 26. The blades are made of high-manganese steel, which has good wear resistance and impact toughness. The pulverizing blades 27 are spirally distributed on the rotating shaft 26, and the blade edges have a serrated structure, which can effectively improve the pulverizing efficiency. The blades are fixedly connected to the rotating shaft 26 by bolts. The pulverizing blades 27 on the two rotating shafts 26 are staggered to ensure that there are no dead corners during the pulverizing process, and to achieve thorough pulverization of feces and sewage.

[0040] The feed pipe 4 is located on the bottom side of the feed hopper 1 and is used to transport the pretreated material to the bioconversion chamber. The feed pipe 4 is made of seamless stainless steel pipe with a polished inner wall to reduce resistance during material transport and prevent material adhesion and blockage. The feed pipe 4 is connected to the feed hopper 1 by welding. The other end of the feed pipe 4 is connected to the feed inlet of the bioconversion chamber via a flange and is equipped with a sealing gasket made of corrosion-resistant rubber to effectively prevent material leakage and odor leakage.

[0041] The fluid pump 28, made of stainless steel, is mounted on the feed pipe 4 and features corrosion resistance, non-clogging properties, and stable conveying. The fluid pump 28 is fixed to the device frame by a bracket made of welded angle steel with a rust-proof surface treatment. The inlet and outlet of the fluid pump 28 are connected to the feed pipe 4 via flanges, with sealing gaskets at the connections to ensure a tight seal. The fluid pump 28 provides power for material conveying, ensuring that pre-treated material can be stably and efficiently transported to the bioconversion chamber. It also allows for adjustment of the flow rate based on the material level in the bioconversion chamber, enabling continuous feeding.

[0042] The bioconversion chamber is the core unit for manure treatment, providing a suitable growth and reproduction environment for black soldier flies to achieve the biological decomposition of manure. The bioconversion chamber includes a shell 5, with a door 6 on the shell 5. Inside the shell 5, there are at least three layers of storage trays 7, adjacent storage trays 7 are connected by a column 8, which penetrates through the storage trays 7. The end of the column 8 away from the storage trays 7 is connected to the top of the shell 5, and a separation chamber 9 is located at the bottom of the shell 5.

[0043] The shell 5, as the main structure of the bioconversion chamber, is rectangular in shape and can accommodate multiple storage trays 7, providing ample space for the black soldier fly larvae to move around. The shell 5 is welded from 304 stainless steel, and the outer wall of the shell 5 is reinforced with ribs, which can effectively improve the structural strength of the shell 5 and prevent the shell 5 from deforming due to the weight and pressure of the internal materials.

[0044] Two doors 6 are installed on the shell 5. Doors 6 are made of stainless steel, and a sealing strip made of silicone rubber is installed between the door 6 and the shell 5. This sealing strip is characterized by high temperature resistance, aging resistance, and good sealing performance, effectively maintaining the stability of the internal environment of the shell 5 and preventing temperature and humidity fluctuations and odor leakage. An observation window 29, made of double-layered tempered glass, is installed on each door 6, allowing operators to easily observe the growth status of the black soldier fly larvae and the treatment of their excrement inside the shell 5 in real time. Doors 6 are connected to the shell 5 by hinges made of stainless steel, which are rust-proof and wear-resistant. Doors 6 are equipped with locks to ensure that they are sealed shut during the biotransformation process.

[0045] The storage tray 7 is located inside the housing 5. In this embodiment, three layers are arranged evenly on top and bottom. The storage tray 7 mainly consists of a screen 19, a receiving tray 20, and a baffle. The components work together to realize the carrying of materials, the collection of leachate, and the division of the black soldier fly activity area.

[0046] The screen 19 is made of stainless steel woven mesh, smaller than the black soldier fly larvae (approximately 3-5 mm in length). This design prevents black soldier flies from falling into the receiving tray 20 during screening, allowing only residual waste and insect debris to pass through. The edges of the screen 19 are fixed with a stainless steel frame, which is welded to the screen 19 to ensure its flatness and structural strength. The screen 19 is connected to the column 8 via a sliding, detachable connection structure. Sleeves are installed at the four corners of the screen 19's frame corresponding to the positions on the column 8. The inner diameter of the sleeves is slightly larger than the outer diameter of the column 8, and wear-resistant bushings are installed on the inner walls of the sleeves. This ensures that the screen 19 can slide up and down along the column 8 and rotate synchronously with the column 8 during rotation, achieving stable transmission.

[0047] The receiving tray 20 is positioned below the screen 19, parallel and flush with it in its initial state, with a gap of no more than 5 mm. During the bioconversion stage, it collects a small amount of permeate from the screen 19. Its core function is to collect the residual waste and insect debris separated by the screen 19 during the sieving stage. The receiving tray 20 is made of stainless steel and has an inclined bottom to facilitate the collection of residual waste and insect debris towards the receiving pipe 21, preventing accumulation. The edges of the receiving tray 20 are reinforced to prevent material spillage; a sealing gasket is installed inside the reinforcing edge, fitting snugly against the screen 19 frame during the bioconversion stage to enhance sealing and reduce odor diffusion. An interface is located at the lowest point of the bottom of the receiving tray 20, welded to the receiving pipe 21 to ensure a tight connection. A filter screen is installed at the interface to prevent large particles from clogging the receiving pipe 21.

[0048] The receiving tray 20 is fixedly connected to the column 8, and the frame of the receiving tray 20 is fastened to the fixing seat on the column 8 with bolts. After the bioconversion is completed, the operator can operate through the door 6 to lift the screen 19 upward along the column 8, so that the screen 19 is separated from the receiving tray 20. The separation distance is controlled at 0.2-0.3 meters. This distance ensures that the material has enough space to fall during the screening process, while avoiding material splashing due to excessive distance.

[0049] The columns 8 serve as the core components for supporting, guiding, and driving the rotation of the storage tray 7. There are four columns in total, located at the four corners of the storage tray 7 and distributed vertically. The columns 8 are made of stainless steel round tubes and run through the three layers of the storage tray 7, providing stable guidance and support for the lifting and rotation of the screen 19.

[0050] The column 8 is bolted to the top of the shell 5. A reinforcing seat, made of welded steel plate, is installed at the top and fits tightly against the top of the shell 5 to improve the support stability of the column 8 and prevent it from shifting during rotation and screening. Positioning pin holes 30 are provided on the column 8 corresponding to the initial and separation positions of each layer of screen 19, and each is equipped with a pluggable positioning pin 22. When the screen 19 is in the initial position of the biotransformation stage or the separation position of the screening stage, the positioning pin 22 can be inserted to fix the screen 19, ensuring operational safety and structural stability.

[0051] A curved section 23 is provided at the end of the column 8 away from the storage tray 7. The curved section 23 is made of stainless steel tubing of the same material as the column 8. One end of the curved section 23 is welded to the column 8, and the other end is connected to the output shaft of the first rotary motor 24 through a coupling to realize power transmission.

[0052] The first rotary motor 24 is located at the top of the housing 5, serving the dual functions of driving the screen 19 to rotate for screening and assisting in the agitation of materials. During the bioconversion stage, the motor drives the column 8 to slowly rotate the screen 19, agitating the materials. During the screening stage, the motor drives the screen 19 to rotate rapidly, screening residual waste and insect debris into the receiving tray 20. The first rotary motor 24 is a stepper motor, offering high control precision and stepless speed adjustment to meet the operational requirements of different stages.

[0053] The motor is fixed to the top cover plate of the housing 5 by a motor bracket. The motor bracket is welded from stainless steel, with a stable structure and equipped with shock-absorbing pads to effectively absorb the vibration generated during motor operation and reduce noise. The output shaft of the motor is connected to the bent parts 23 of the four columns 8 via a coupling. The coupling is a cross-slider coupling, which has a certain ability to buffer and compensate for coaxiality errors, ensuring smooth power transmission.

[0054] During the screening stage, the motor drives the screen 19 to rotate around the column 8. The rotation direction can be set to clockwise or counterclockwise, and the residual waste and insect sand are screened out through the holes of the screen 19.

[0055] The separation chamber 9 is located at the bottom of the shell 5 and is integrally formed with the shell 5. It has an overall rectangular structure and is mainly used to accommodate the separation components, receive residual waste and insect sand conveyed from the receiving pipe 21, and simultaneously achieve the final separation of black soldier fly larvae from the material. The top of the separation chamber 9 is connected to the bottom of the shell 5, and the size of the connection opening is the same as the size of the bottom of the shell 5.

[0056] The separation component is located inside the separation chamber 9 and is mainly responsible for the efficient separation and recycling of the biotransformed black soldier fly larvae from residual waste and insect sand. Its core components include the blower 10, the interception box 11, and the storage box 12.

[0057] The blower 10 is a centrifugal fan, characterized by large air volume, high air pressure, and stable operation. The blower 10 is fixed to the inner wall of the separation chamber 9 by a bracket made of welded angle steel with a rust-proof surface. The bracket is tightly connected to the inner wall of the separation chamber 9 with bolts to ensure the stability of the blower 10 during operation. The function of the blower 10 is to generate airflow, utilizing the density difference between the black soldier fly larvae and residual waste and sand, blowing the black soldier fly larvae towards the interception box 11, thus achieving separation.

[0058] The interceptor box 11 is located inside the separation chamber 9, corresponding to the air outlet of the blower 10, and is used to intercept black soldier flies blown by the airflow. One side of the interceptor box 11 is a filter surface, opposite the air outlet of the blower 10, and the filter surface is equipped with a grid, which allows airflow to pass through while intercepting black soldier flies. The other side of the interceptor box 11 is equipped with a collection door, which adopts a pull-out structure and is connected to the interceptor box 11 via a guide rail. The edges of the collection door are equipped with sealing strips to ensure sealing performance. The bottom of the interceptor box 11 has an inclined structure, which facilitates the concentration of intercepted black soldier flies to the collection door side for easy collection.

[0059] The storage box 12 is located at the bottom of the separation chamber 9, below the interception box 11, and corresponding to the outlet of the receiving pipe 21. It is used to collect residual waste, insect sand, and separated residue conveyed from the receiving pipe 21. The storage box 12 has a drawer-type structure and is made of stainless steel. Rollers are installed on both sides of the storage box 12, which cooperate with the guide rails at the bottom of the separation chamber 9, allowing for flexible pulling of the storage box 12, facilitating the cleaning and transfer of residue. The top of the storage box 12 has an open structure, communicating with the interior of the separation chamber 9, allowing for ample material collection. A handle made of welded stainless steel is installed at the front of the storage box 12, making it easy for operators to pull out the storage box 12.

[0060] The environmental control module is used to monitor and regulate the temperature, humidity, oxygen content and light conditions in the biotransformation chamber in real time, providing a stable and suitable environment for the growth and reproduction of black soldier flies. Its core components include a temperature and humidity sensor 13, an electric heating tube 14, a humidifier 15, an aeration assembly and a light regulation assembly.

[0061] The temperature and humidity sensor 13 is a digital sensor, featuring high measurement accuracy, fast response speed, and good stability. Four temperature and humidity sensors 13 are installed at the four corners inside the biotransformation chamber, enabling comprehensive and accurate monitoring of temperature and humidity data in different areas within the chamber. The sensors are fixed to the inner wall of the shell 5 by brackets made of stainless steel, which are compact and do not interfere with the black soldier fly's activity. The sensors connect to the external control system via data cables. Data transmission uses the I2C communication protocol, offering high transmission speed and strong anti-interference capabilities, allowing real-time transmission of temperature and humidity data to the control system, providing a basis for environmental regulation.

[0062] The electric heating element 14 is used to regulate the temperature inside the bioconversion chamber. When the temperature inside the chamber is lower than the suitable growth temperature for black soldier flies (25-30℃), the electric heating element 14 activates to ensure the temperature inside the chamber remains stable within the appropriate range. The electric heating element 14 is made of stainless steel. The electric heating elements 14 are evenly distributed on both sides of the inner wall of the bioconversion chamber to ensure uniform heating and eliminate temperature dead zones. The heating elements are fixed to the inner wall of the shell 5 by mounting brackets made of high-temperature resistant ceramic material, which has good insulation and high-temperature resistance. The surface of the heating elements is treated with anti-corrosion coating to withstand corrosion from manure environments, resulting in a long service life. The electric heating element 14 is automatically controlled by the control system, which automatically starts and stops and adjusts the power based on temperature data fed back by the temperature and humidity sensor 13.

[0063] Humidifier 15 is used to regulate the humidity inside the bioconversion chamber, maintaining it within a suitable range of 60-70% RH to provide a humid environment for black soldier fly growth. Humidifier 15 is an ultrasonic humidifier, characterized by high humidification efficiency and fine, uniform mist particles. Humidifier 15 is installed at the top inside the bioconversion chamber, near the shell 5, and is fixed by a bracket made of stainless steel. The spray nozzle of humidifier 15 faces downwards into the chamber, providing a wide spray range and ensuring uniform humidity distribution. The water tank of humidifier 15 is removable for easy refilling and cleaning. Humidifier 15 is connected to the control system via a data cable and automatically starts and stops based on humidity data fed back by temperature and humidity sensor 13 to maintain stable humidity inside the chamber.

[0064] The aeration assembly is used to introduce air into the bioconversion chamber, increasing the oxygen content and promoting air circulation while expelling harmful gases produced during manure decomposition, thus providing sufficient oxygen for the black soldier fly larvae. The aeration assembly mainly consists of aerators 16, aeration heads 17, and aeration pipes 18. Aerators 16 utilize a rotary blower 10, characterized by low noise, stable operation, and long service life. Aerators 16 are installed outside the bioconversion chamber.

[0065] The aeration pipe 18 is made of UPVC material, which is corrosion-resistant, lightweight, and easy to install. The aeration pipe 18 is divided into a main pipe and branch pipes. One end of the main pipe is connected to the air outlet of the aerator 16, and the other end extends into the bioconversion chamber. The branch pipes branch off from the main pipe and are evenly distributed below each layer of storage trays 7. Each layer of storage tray 7 corresponds to two branch pipes. The branch pipes are connected to the main pipes with tee joints, and the joints are fixed with adhesive to ensure sealing performance.

[0066] The aeration heads 17 are made of titanium alloy, ensuring uniform aeration, producing fine bubbles, and maximizing oxygen utilization. Ten aeration heads 17 are evenly installed on each branch pipe, ensuring uniform oxygen supply throughout the chamber. The aeration heads 17 are threadedly connected to the branch pipes for easy disassembly and maintenance. The aeration assembly is controlled by a system that automatically adjusts the aeration intensity and duration based on the oxygen content within the chamber, ensuring the oxygen concentration is maintained above 20%.

[0067] The light regulation component is used to adjust the light conditions inside the biotransformation chamber. Black soldier flies require suitable light intensity and duration for growth and reproduction. This component simulates a natural light environment, promoting the growth and development of black soldier flies. In this embodiment, the light regulation component consists of eight LED light sources 25, evenly distributed at the top of the interior of the housing 5 in a matrix arrangement to ensure uniform lighting within the chamber. The LED light sources 25 are cold light sources with adjustable light intensity. The LED light sources 25 are fixed to the top of the housing 5 by aluminum heat sinks, which have excellent heat dissipation performance, effectively reducing the light source temperature and extending its lifespan. Each LED light source 25 is equipped with an independent control switch, allowing for group control and light duration setting via the control system, simulating a day-night cycle environment that aligns with the growth rhythm of black soldier flies.

[0068] In the pretreatment stage, the operator feeds raw livestock manure into the feed hopper 1 through the manure inlet 2. Simultaneously, based on the moisture content and composition of the manure, an appropriate amount of sawdust, wheat bran, and other auxiliary materials are added through the auxiliary material inlet 3, with a ratio of auxiliary materials to manure of 1:5 (by mass). The second rotary motor is started, driving the rotating shaft 26 and the crushing blades 27 to rotate, crushing and mixing the manure and auxiliary materials, breaking large pieces of manure into fine particles, achieving uniform mixing of manure and auxiliary materials. After pretreatment, the fluid pump 28 is started, conveying the mixture to the storage trays 7 of the bioconversion chamber through the feed pipe 4. During the conveying process, the flow rate can be adjusted by the fluid pump 28 to ensure uniform distribution of material on each layer of storage trays 7. At this time, the screen 19 is in contact with the receiving tray 20, and the positioning pin 22 is inserted to fix the position of the screen 19, ensuring the airtightness of the bioconversion stage.

[0069] After the material transfer is completed, the door 6 of the bioconversion chamber is closed, and the environmental control module is activated. Temperature and humidity sensors 13 monitor the temperature and humidity inside the chamber in real time. When the temperature is below 25℃, the control system activates the electric heating element 14 to raise the temperature to 25-30℃; when the humidity is below 60%RH, the humidifier 15 is activated to adjust the humidity to 60-70%RH. Simultaneously, the aeration components continuously supply air into the chamber to maintain sufficient oxygen content. The LED light source 25 operates according to the set lighting program, simulating a natural light environment. Then, black soldier fly larvae are evenly sown onto the material in the storage tray 7 at a density of 50,000-100,000 larvae per square meter. The first rotary motor 24 is activated, driving the screen 19 to rotate slowly at 10 rpm, constantly turning the material. The black soldier flies freely move through the material, fully contacting the excrement, feeding on it to grow and reproduce, while simultaneously decomposing the excrement into residual waste, insect sand, and their own biomass. The biotransformation process lasts 5-7 days. During this period, operators can observe the growth status of the black soldier fly and the treatment of its excrement in real time through the observation window 29 on the door 6.

[0070] After bioconversion is completed, the environmental control module and the first rotary motor 24 are stopped. The door 6 of the bioconversion chamber is opened, the positioning pins 22 of the screen 19 are pulled out, and each layer of screen 19 is lifted upward along the column 8 to separate the screen 19 from the receiving tray 20. The separation distance is adjusted to 0.25 meters. Then, the positioning pins 22 are inserted to fix the screen 19. After closing the door 6, the first rotary motor 24 is restarted and the speed is adjusted to 40 rpm. The screen 19 is driven to rotate rapidly around the column 8. Under the action of centrifugal force, the residual waste and insect sand in the material fall through the holes of the screen 19 into the receiving tray 20 below. Since the bottom of the receiving tray 20 is inclined, the material gathers along the inclined surface of the receiving tray 20 to the receiving pipe 21, and is then transported through the receiving pipe 21 to the storage box 12 of the separation chamber 9.

[0071] At the same time, the fan 10 inside the separation chamber 9 is turned on to generate directional airflow. Some black soldier flies fall into the separation chamber 9 under their own gravity. The airflow uses the density difference between the black soldier flies and a small amount of residual material to blow the black soldier flies toward the interception box 11. The black soldier flies are intercepted by the grid, while the small amount of residual material falls into the storage box 12.

[0072] After separation, the blower 10 is turned off, and the operator opens the insect collection door of the interception box 11 to collect the intercepted black soldier flies. The black soldier flies can be used as high-protein feed for aquaculture, poultry farming, etc. Subsequently, the storage box 12 is pulled out to collect the remaining waste and insect sand after processing. After drying, the material can be used as organic fertilizer for crop planting, landscaping, etc., to achieve resource recycling.

[0073] After recycling, the device is cleaned and maintained. Remove the separation positioning pin 22 from screen 19, lower screen 19 to a position flush with the receiving tray 20, and reinsert the initial positioning pin 22. Open the door 6 of the bioconversion chamber and the sealing cover of the feed hopper 1, and rinse and clean all components to remove residual manure and materials. Check the operating status of each component and replace any damaged parts. Disinfect the device to prevent bacterial growth and ensure hygiene and safety for the next use. After cleaning and maintenance, close all doors 6 and sealing covers, and the device is in standby mode, awaiting the next batch of manure treatment.

Claims

1. A livestock manure treatment and recycling device, characterized in that, It includes a controller, a pretreatment module electrically connected to the controller, a biotransformation chamber, separation components, and an environmental control module; The pretreatment module includes a feeding hopper (1), which is a cylindrical (8) structure. The top of the feeding hopper (1) is provided with a manure inlet (2) and an auxiliary material inlet (3). The inside of the feeding hopper (1) is provided with a crushing mechanism. The bottom of the feeding hopper (1) is provided with a guide pipe (4), which is connected to the bioconversion chamber. The biotransformation chamber includes a shell (5), a door (6) is provided on the shell (5), an observation window (29) is provided on the door (6), at least three layers of storage trays (7) are provided inside the shell (5), adjacent storage trays (7) are connected by a column (8), the column (8) penetrates through the storage tray (7), the end of the column (8) away from the storage tray (7) is connected to the top of the shell (5), and a separation chamber (9) is provided at the bottom of the shell (5). The separation assembly includes a fan (10), an interception box (11), and a storage box (12) disposed in the separation chamber (9). The environmental control module includes a temperature and humidity sensor (13), an electric heating tube (14), a humidifier (15), and an aeration assembly, all located inside the housing (5).

2. The livestock manure treatment and recycling device according to claim 1, characterized in that, The aeration assembly includes an aerator (16) and an aeration head (17) disposed inside the housing (5), wherein the aerator (16) and the aeration head (17) are connected by an aeration pipe (18).

3. The livestock manure treatment and recycling device according to claim 1, characterized in that, The storage tray (7) includes a screen (19) and a receiving tray (20) located below the screen (19). A receiving pipe (21) is located below the receiving tray (20), and the end of the receiving pipe (21) away from the receiving tray (20) is connected to a separation component. Positioning pin holes (30) for initial position and separation position are provided on the column (8) corresponding to each layer of screen (19). Positioning pins (22) are provided on the positioning pin holes (30). A bending part (23) is provided above the column (8). A first rotary motor (24) is provided at the end of the bending part (23) away from the storage tray (7). The first rotary motor (24) is located on the top of the housing (5).

4. The livestock manure treatment and recycling device according to claim 1, characterized in that, The environmental control module also includes a light adjustment component, which consists of at least two LED light sources (25) and is evenly distributed inside the top of the housing (5).

5. The livestock manure treatment and recycling device according to claim 1, characterized in that, The crushing mechanism includes a second rotary motor located at the bottom of the feed hopper (1), a rotary shaft (26) fixedly connected to the second rotary motor, and crushing blades (27) located on the rotary shaft (26).

6. The livestock manure treatment and recycling device according to claim 3, characterized in that, The mesh size of the screen (19) is smaller than that of the black soldier fly.

7. The livestock manure treatment and recycling device according to claim 1, characterized in that, A fluid pump (28) is installed on the feed pipe (4).

8. The livestock manure treatment and recycling device according to claim 3, characterized in that, The bottom of the receiving tray (20) is inclined.

9. The livestock manure treatment and recycling device according to claim 5, characterized in that, Two rotating shafts (26) are provided, and the two rotating shafts (26) are arranged in parallel. Each rotating shaft (26) is provided with 8-12 crushing blades (27).

10. The livestock manure treatment and recycling device according to claim 1, characterized in that, The edge of the sewage inlet (2) is provided with a removable splash guard.

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