An integrated system and method for treating livestock manure, comprising solid-liquid separation, biological deodorization, and organic fertilizer preparation.

Abstract

This invention discloses an integrated system and method for treating livestock manure, comprising a pretreatment module, a solid-liquid separation module, a biological deodorization module, an organic fertilizer preparation module, a heat recovery unit, and a central control system, all linked sequentially. The central control system enables the organic linkage of each module. A PLC controller collects over 20 parameters in real time, including temperature, pressure, and gas concentration, and dynamically adjusts the auger speed (50-150 r / min) and deodorization air volume (1000-5000 m³ / min). 3 The system is equipped with a multi-level alarm mechanism that sets up an audible and visual alarm and automatically adjusts operating parameters when situations such as excessive exhaust gas concentration or abnormal fermentation temperature occur, thus solving the drawbacks of traditional systems that rely on manual monitoring.

Description

Technical Field

[0001] This invention relates to the field of livestock breeding technology, and in particular to an integrated system and method for treating livestock manure and wastewater that integrates solid-liquid separation, biological deodorization, and organic fertilizer preparation. Background Technology

[0002] With the large-scale and intensive development of livestock and poultry farming in my country, the amount of livestock manure produced has been increasing year by year, exceeding 3.8 billion tons annually. Achieving harmless treatment and resource utilization of manure is not only key to solving the pollution problem caused by livestock farming, but also a core element in promoting the development of green, circular agriculture. While current mainstream livestock manure treatment technologies have formed a preliminary system, many pain points still need to be addressed in practical applications, specifically in the following aspects:

[0003] (i) The solid-liquid separation process is inefficient and lacks adaptability.

[0004] Solid-liquid separation is a crucial pre-treatment step in manure management, and its effectiveness directly determines subsequent treatment costs and resource utilization efficiency. In existing technologies, screw extrusion separators are widely used due to their simple structure, but they generally suffer from unreasonable parameter design: the screens are mostly made of ordinary steel with a aperture of 2mm or more, resulting in a retention rate of less than 40% for colloidal substances with a particle size <1mm in piglet manure, leading to the loss of more than 30% of organic matter with the liquid phase, increasing the COD load of subsequent treatment by 20%-25%; simultaneously, the uniform screw pitch results in large fluctuations in extrusion pressure (above ±0.1MPa), causing unstable moisture content in the solids (often higher than 70%), requiring the addition of large amounts of conditioning agents before entering the fermentation stage. Furthermore, existing equipment lacks differentiated design for the characteristics of different livestock and poultry manures, exhibiting poor adaptability in processing high-moisture (85%-90%) pig manure and high-fiber cow manure, easily leading to clogging or incomplete separation.

[0005] (ii) The deodorization process causes serious secondary pollution and its effectiveness is unstable.

[0006] The malodorous gases such as NH3 and H2S produced during the treatment of livestock manure not only endanger the health of operators but also cause environmental disputes in the surrounding area. Currently, most farms still use chemical deodorization methods, treating the manure by spraying disinfectants or oxidants. However, this method is not only costly in terms of chemical consumption but also prone to generating new chemical pollutants. Furthermore, in the slightly alkaline environment of the manure (pH 7.2-7.8), the kill rate decreases by 20%-30%. Some biological deodorization systems have a simple structure, consisting of only a single-layer biological filter, and the carrier is not specifically loaded with highly efficient degrading bacteria, resulting in low deodorization efficiency and weak shock resistance. When the amount of manure treated fluctuates, the NH3 concentration in the exhaust gas often exceeds 15 mg / m³. 3The emission standards are inadequate. More importantly, existing deodorization systems often directly discharge liquid-phase byproducts, which not only wastes water resources but may also cause secondary pollution.

[0007] (iii) The organic fertilizer preparation process has a low level of automation and uneven quality.

[0008] Aerobic fermentation is the core technology for the resource-based production of organic fertilizer from manure, but existing processes have significant shortcomings: First, the mixing stage relies on manual experience to adjust the C / N ratio and moisture content, often resulting in imbalances that reduce fermentation efficiency and even cause anaerobic putrefaction. Second, the fermentation process lacks precise temperature and ventilation control, making it difficult to establish a scientific cycle of "heating-high-temperature composting-cooling," leading to incomplete pathogen eradication; the mortality rate of roundworm eggs is often below 90%, failing to meet the safety standards for organic fertilizer. Third, the system does not consider energy recovery and utilization; the waste heat generated at 55-70℃ during fermentation is directly dissipated, wasting energy and requiring additional fuel to maintain the fermentation temperature in low-temperature environments. Furthermore, existing equipment is mostly a decentralized design, lacking coordinated control of solid-liquid separation, deodorization, and fermentation processes, resulting in low overall processing efficiency and difficulty in meeting the needs of large-scale farming.

[0009] (iv) Insufficient system integration and resource recycling rate

[0010] Currently, most manure treatment systems adopt a "segmented treatment, independent operation" model, with modules such as pretreatment, separation, deodorization, and fermentation lacking organic linkage, resulting in high energy consumption for material transportation and large land area requirements. In terms of resource recovery, there is significant waste: the liquid phase after solid-liquid separation is not fully reused, spray wastewater from the deodorization system is directly discharged, and fermentation waste heat is not effectively recovered. These problems not only reduce the system's economic efficiency but also hinder the construction of a crop-livestock integrated farming model. Furthermore, existing systems lack full-process intelligent monitoring, making it impossible to detect changes in the operating parameters of each module in real time. When problems such as screen blockage or abnormal fermentation temperature occur, timely response and adjustment are difficult, affecting treatment stability.

[0011] Therefore, developing an integrated livestock manure treatment system with high integration, strong adaptability, and full resource recycling has become an urgent need for the industry. Summary of the Invention

[0012] In order to overcome the shortcomings of the prior art, one of the objectives of this invention is to provide an integrated treatment system and method for livestock manure and wastewater that integrates solid-liquid separation, biological deodorization, and organic fertilizer preparation.

[0013] One of the objectives of this invention is achieved through the following technical solution:

[0014] An integrated treatment system for livestock manure, comprising solid-liquid separation, biological deodorization, and organic fertilizer preparation, including a pretreatment module, a solid-liquid separation module, a biological deodorization module, an organic fertilizer preparation module, a heat recovery unit, and a central control system, which are linked in sequence.

[0015] The pretreatment module includes a manure buffer tank, a bar screen, and a crushing device. The bar screen is located at the feed end of the buffer tank and has a screen size of 10-20mm. It is used to intercept impurities such as stones and plastics with a particle size >20mm in the manure. The crushing device is a horizontal twin-shaft crusher. Its crushing chamber has staggered toothed crushing blades inside, which can crush the manure to a particle size ≤5mm. The feed inlet of the crushing device is connected to the discharge outlet of the buffer tank through a submersible pump. The discharge outlet is connected to the feed inlet of the solid-liquid separation module through a closed spiral conveying pipeline.

[0016] The solid-liquid separation module adopts a screw extrusion separator, including a frame, a sealed outer shell, a screen cylinder, an auger, and a drive motor. The screen cylinder is located inside the sealed outer shell, with a length of 1500-3000 mm. The screen mesh is made of 304 stainless steel, with a aperture of 0.5-1 mm and a mesh density of 80-120 holes / cm². 2 A water pump is connected to the liquid phase outlet at the bottom of the sealed outer shell. An overflow pipe is provided above the feed pipe, and the distance from the overflow outlet of the overflow pipe to the outer surface of the outer shell is 800-1500mm. Two vent holes that can be opened and closed are provided on the upper end face of the outer shell. Four hinged cleaning covers with buckles are installed on the side wall seal. The auger is driven by a drive motor, and the pitch gradually decreases from 200mm to 80mm along the material conveying direction. The extrusion pressure during separation is 0.3-0.8MPa. The moisture content of the solid after separation is controlled at 40%-65%. The solid phase outlet is connected to the organic fertilizer preparation module through a scraper conveyor, and the liquid phase outlet is connected to the biological deodorization module through a closed pipe.

[0017] The biological deodorization module is a multi-stage composite sealed structure, comprising a gas-liquid contact unit, a biological filter unit, and an exhaust gas detection and emission unit, with each unit connected in series via a sealed duct. The gas-liquid contact unit is a spray tower structure, with a liquid storage tank at the bottom, a cyclone demister at the top, and three layers of corrugated packing material arranged in a staggered pattern in the middle. A spraying device is installed above the packing material layers, and the spray liquid is an aqueous solution containing 0.1-0.3% composite microbial agent, with a spray density of 8-12 m³ / h. 3 / (m 2 The compound microbial agent (h) includes *Saccharomyces cerevisiae*, *Lactobacillus plantarum*, *Streptomyces* sp., and *Bacillus subtilis*, with a total viable count ≥ 2.0 × 10⁻⁶. 9CFU / mL; the filter media layer of the biofilter unit has a height of 1.2-1.8m, consisting of a pebble support layer (thickness 200-300mm, particle size 20-50mm), a composite microbial carrier layer (thickness 800-1200mm), and an activated carbon adsorption layer (thickness 100-200mm) from bottom to top. The composite microbial carrier is composed of volcanic rock (particle size 5-15mm) and peat moss in a weight ratio of 1:2, and is loaded with a composite microbial community of Acinetobacter TAT1-6A (accession number CGMCC No. 24567) and Pichia farinose NHG (accession number CGMCC No. 24568). The carrier has a porosity ≥55% and a specific surface area ≥120m². 2 / g; The exhaust gas detection and emission unit has a built-in NH3 sensor, H2S sensor and flow sensor, which can monitor the NH3 concentration in the exhaust gas in real time to ≤15mg / m³. 3 H2S concentration ≤1mg / m³ 3 When the concentration exceeds a preset threshold, an audible and visual alarm is triggered.

[0018] The organic fertilizer preparation module includes a mixing silo, an aerobic fermentation reactor, and a post-composting silo connected in sequence. The mixing silo is a horizontal cylindrical body with a stirring device at a speed of 30-50 r / min. It is equipped with a conditioner addition port, a liquid addition port, and an online moisture / C / N detector, which can adjust the C / N ratio of the material to 20-30:1 and the moisture content to 50-60%. The conditioner is corn stalks or rice husks crushed to a particle size ≤10mm. The aerobic fermentation reactor is a trough structure with a length of 10-20m, a width of 3-5m, and a depth of 1.5-2.0m. It has a built-in hydraulically driven turning mechanism, which can turn the compost to the bottom of the trough. The turning tooth spacing is 150-200mm. A perforated aeration pipe network is laid at the bottom of the reactor, and forced ventilation is provided by a Roots blower with a ventilation volume of 0.1-0.2m³. 3 / (m 3 The fermentation tank is equipped with temperature and pH sensors to control the fermentation temperature at 55-70℃ and the pH value at 7-8.5. The post-fermentation chamber is a sealed, insulated chamber with ventilation holes to maintain the material moisture content at 40-50% during the fermentation process.

[0019] The heat recovery unit includes a heat exchange coil, a circulating pump and an insulated water tank. The heat exchange coil is buried in the material layer of the aerobic fermentation reactor. It forms a circulation loop with the storage tank of the gas-liquid contact unit through the circulating pump. The waste heat of 55-70℃ generated by fermentation can be used to heat the spray liquid to 30-35℃.

[0020] The central control system includes a PLC controller, a touch screen, and a data acquisition module. The data acquisition module is electrically connected to the temperature, pressure, liquid level, ORP value, and gas concentration sensors of each module. The PLC controller is electrically connected to the drive motors, pumps, valves, and fans of each module, and can dynamically adjust the auger speed of the separator (50-150 r / min) and the air volume of the deodorizing fan (1000-5000 m³ / min) according to the amount of sewage to be treated. 3 The system has a fermentation turning frequency (once every 12-24 hours) and data storage and remote monitoring functions.

[0021] As a further improvement to the above technical solution:

[0022] The processing capacity of the spiral extrusion separator is adapted to the scale of livestock farming, with a processing capacity of 4-25 cubic meters for pig manure (initial moisture content 85-90%). 3 / hour, the processing capacity for cow manure (initial moisture content 80-85%) is 5-40m³. 3 / hour, during the separation process, the pressure inside the screen cylinder is controlled by a water pump to stabilize at the set value ±0.05MPa.

[0023] The gas-liquid contact unit of the biological deodorization module is equipped with a liquid level sensor and an automatic liquid replenishment device in its storage tank. The spray liquid is replaced every 24 hours, and the waste liquid is transported to the mixing silo through a pipeline as a humidity regulating liquid. The filter layer of the biological filter unit is equipped with a liquid collection tank, which is connected to the mixing silo through a return pipeline to realize the recycling of liquid resources.

[0024] The fermentation process in the aerobic fermentation reactor is divided into three stages: a heating stage (temperature rapidly rises from room temperature to 65-70℃, lasting 1-2 days), a high-temperature composting stage (temperature maintained at 55-65℃, lasting 5-6 days), and a cooling stage (temperature gradually decreases to 40-45℃, maintained for 1-2 days), with a total fermentation cycle of 7-10 days. The composting cycle in the post-composting chamber is 15-20 days. After composting, the organic matter content of the material is ≥45%, the mortality rate of roundworm eggs is ≥95%, and the fecal coliform count is ≤10. 5 per g.

[0025] The buffer tank of the pretreatment module is equipped with a level gauge. When the level reaches 80% of the tank volume, the submersible pump is automatically started to transport the sewage. The cleaning cover of the solid-liquid separation module can be used as an observation port. After opening, the screen cylinder and auger can be cleaned online. The cleaning wastewater is collected and returned to the buffer tank.

[0026] An integrated treatment method for livestock manure, comprising solid-liquid separation, biological deodorization, and organic fertilizer preparation, includes the following steps:

[0027] Pretreatment: Livestock manure (pig manure, cow manure or a mixture thereof) is temporarily stored in a buffer tank. After large particles are intercepted by a grid device with a gap of 10-20mm, it is pumped to a horizontal twin-shaft crusher by a submersible pump. The crushed particles are crushed to a particle size of ≤5mm by toothed crushing blades. During the crushing process, air is discharged from the device through the exhaust port to prevent pressure buildup.

[0028] Solid-liquid separation: The crushed manure is fed into the screw extrusion separator through a screw conveyor pipeline. The exhaust port is opened to fill the screen cylinder with material and then closed. The drive motor is started to drive the auger to rotate (speed 50-150 r / min). The separation is carried out under a pressure of 0.3-0.8 MPa. At the same time, the water pump is started to extract the separated liquid. During the separation process, the pressure inside the screen cylinder is kept stable through the overflow pipe. Solid matter with a water content of 40%-65% and liquid matter containing soluble organic matter are obtained. When the separation efficiency decreases, the cleaning cover is opened to clean the screen cylinder online.

[0029] Biological deodorization: The liquid obtained in step 2 is sent to the gas-liquid contact unit of the biological deodorization module, where it comes into full contact with the spray liquid at 30-35℃ in the corrugated packing layer. The amount of compound microbial agent added to the spray liquid is 0.2-0.5% of the liquid's mass, and the contact time is 15-20 minutes. Subsequently, the gas-liquid mixture enters the biological filter unit, where the liquid remains in the composite microbial carrier layer for 1-2 hours. Organic matter is degraded through the synergistic effect of Acinetobacter TAT1-6A and Pichia pastoris NHG. The temperature inside the carrier layer is maintained at 25-35℃. The treated exhaust gas is further purified by the activated carbon adsorption layer and is discharged after passing the exhaust gas detection unit. If it fails the test, an alarm is triggered and the gas is returned to the biological filter unit for retreatment.

[0030] Organic fertilizer preparation:

[0031] Mixing and conditioning: The solid material obtained in step 2 is sent into the mixing silo, corn stalks or rice husk conditioner is added, and the return liquid from the biological deodorization module is introduced at the same time. The stirring device is started (30-50 r / min) and stirred evenly. The C / N ratio of the material is adjusted to 20-30:1 and the moisture content is adjusted to 50-60% by online detection.

[0032] Aerobic fermentation: The conditioned material is fed into the aerobic fermentation reactor, and the Roots blower is started for forced ventilation (ventilation volume 0.1-0.2 m³ / h). 3 / (m 3The fermentation process is controlled by a PLC controller to turn the material over once every 12-24 hours, with the turning depth reaching the bottom of the tank to ensure uniform oxygen supply. The fermentation process is carried out in three stages: heating up to 65-70℃ for 1-2 days, high-temperature composting at 55-65℃ for 5-6 days, and cooling down to 40-45℃ for 1-2 days. During this period, the temperature and pH value are monitored in real time. When the temperature is below 55℃, the ventilation is increased, and when the pH value is above 8.5, the conditioner is added.

[0033] Post-composting: The fermentation products are sent into the post-composting chamber. The chamber is kept ventilated, and the moisture content of the material is controlled at 40-50%. After 15-20 days of composting, the finished organic fertilizer is obtained.

[0034] Intelligent control and waste heat utilization: The central control system collects the operating parameters of each module in real time. When the pressure fluctuation of the solid-liquid separation module exceeds ±0.05MPa, the screw conveyor speed and water pump flow rate are adjusted. When the exhaust gas concentration of the biological deodorization module exceeds the standard, the spraying frequency and the amount of bacterial agent added are increased. When the ambient temperature is below 10℃, the waste heat from fermentation is used to heat the spray liquid through the heat recovery unit to ensure that the activity of the biological community and the fermentation temperature meet the standards.

[0035] As a further improvement to the above technical solution:

[0036] In step 3, the inoculation amount of the composite microbial community is 0.5-1.0% of the liquid mass, wherein the ratio of viable Acinetobacter TAT1-6A to Pichia pastoris NHG is 1:2-3, and the empty bed residence time of the biofilter unit is 60-90s.

[0037] In step 4, the aeration network pressure of the aerobic fermentation reactor is 0.02-0.05 MPa, the turning mechanism moves at a speed of 0.5-1.0 m / min, and temperature and pH data are recorded every 4 hours during the fermentation process. The data is automatically stored and reports are generated by the central control system.

[0038] Suitable for ambient temperatures of 0℃-40℃. When treating high-viscosity manure (viscosity > 500 mPa·s), add 0.05-0.1% of biological enzyme preparation (containing cellulase and protease, enzyme activity ≥ 1000 U / g) by mass of manure during the pretreatment stage to improve crushing and separation efficiency.

[0039] Finished organic fertilizer must meet the standards of "Organic Fertilizer" (NY525-2021), in which organic matter (on a dry basis) ≥45%, total nutrients (N+P2O5+K2O, on a dry basis) ≥5.0%, moisture (free water) ≤30%, and pH value 5.5-8.5.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] (i) Solid-liquid separation efficiency is greatly improved and adaptability is significantly enhanced.

[0042] This invention achieves efficient separation of different types of fecal waste by optimizing the structure and parameter design of the solid-liquid separation module. It employs a 0.5-1mm aperture screen made of 304 stainless steel, coupled with 80-120 holes / cm². 2 The high-density arrangement of the screw conveyor increases the retention rate of colloidal substances to over 85%, reducing the liquid phase COD load by more than 30% and effectively alleviating the pressure on subsequent treatment. The auger adopts a gradually decreasing pitch design (from 200mm to 80mm), combined with precise pressure control of 0.3-0.8MPa, ensuring the solid material moisture content remains stable at 40%-65%, allowing it to directly enter the fermentation stage without the need for additional conditioning agents. Addressing the differences in characteristics between pig and cow manure, adjustments to the auger speed and screen parameters achieve a range of 4-25m. 3 / hour (pig manure) and 5-40m 3 The differentiated processing capacity of / hour (cow manure) solves the problem of poor adaptability of traditional equipment.

[0043] (ii) Multi-stage biological deodorization achieves emission standards without secondary pollution.

[0044] This invention employs a three-stage deodorization structure of "gas-liquid contact + composite biological filter + activated carbon adsorption," completely solving the problems of poor deodorization and severe pollution associated with traditional processes. The gas-liquid contact unit uses a 30-35℃ warm spray liquid (containing composite microbial agents) to fully contact the malodorous gas, initially removing over 40% of soluble malodorous substances. The biological filter unit uses a volcanic rock-peat composite carrier, loaded with highly efficient bacteria including Acinetobacter TAT1-6A and powdered Pichia pastoris NHG. Through synergistic microbial metabolism, organic malodorous substances are degraded into harmless products such as CO2 and H2O. The carrier porosity ≥55% ensures sufficient gas-liquid mass transfer. Finally, the activated carbon adsorption layer provides deep purification, ensuring that the NH3 concentration in the exhaust gas is ≤15mg / m³. 3 H2S concentration ≤1mg / m³ 3 It fully meets emission standards. More importantly, the liquid phase products of the deodorization system are all recycled back to the mixing silo through the return pipeline, realizing the recycling of water resources and nutrients and completely eliminating secondary pollution.

[0045] (III) The quality of organic fertilizer is standardized and meets the needs of green farming.

[0046] This invention significantly improves product quality and production efficiency by precisely controlling the entire organic fertilizer preparation process. During the mixing stage, an online moisture / C / N analyzer and an automatic stirring system are used to precisely control the C / N ratio of the materials at 20-30:1 and the moisture content at 50-60%, laying the foundation for efficient fermentation. The aerobic fermentation reactor uses a PLC controller to achieve staged temperature control: a rapid temperature rise to 65-70℃ in 1-2 days, a high-temperature composting at 55-65℃ for 5-6 days, and a temperature drop to 40-45℃ in 1-2 days, ensuring a roundworm egg mortality rate of ≥95% and a fecal coliform count of ≤10. 5 per g.

[0047] (iv) Energy and resource recycling significantly reduces costs and increases efficiency.

[0048] This invention innovatively sets up a heat recovery unit, which uses heat exchange coils embedded in the fermentation material to recover the waste heat from fermentation and use it to heat the deodorizing spray liquid to 30-35℃. This not only ensures the activity of microorganisms but also reduces energy consumption. In a low-temperature environment of 0℃-10℃, it can save more than 60% of heating energy consumption.

[0049] (v) Intelligent linkage throughout the entire process, greatly improving operational stability

[0050] This invention achieves organic linkage between various modules through a central control system. The PLC controller collects more than 20 parameters such as temperature, pressure, and gas concentration in real time, and dynamically adjusts the auger speed (50-150 r / min) and deodorization air volume (1000-5000 m³ / min). 3 The system is equipped with a set frequency of turning the compost (every 12-24 hours) to ensure stable operation even when the amount of manure treated fluctuates. A multi-level alarm mechanism is also included, which immediately triggers audible and visual alarms and automatically adjusts operating parameters when situations such as excessive exhaust gas concentration or abnormal fermentation temperature occur, thus overcoming the drawbacks of traditional systems that rely on manual monitoring.

[0051] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0052] Figure 1 This is a flowchart of the pretreatment and solid-liquid separation process in this embodiment;

[0053] Figure 2 This is a flowchart of the biological deodorization process in this embodiment;

[0054] Figure 3 This is a flowchart of the organic fertilizer preparation process in this embodiment;

[0055] Figure 4 This is a flowchart of the intelligent control and resource cycle in this embodiment. Detailed Implementation

[0056] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0057] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] Example 1: Manure Treatment System for Large-Scale Pig Farms

[0060] (a) System configuration parameters

[0061] This embodiment is suitable for large-scale pig farms with a stock of 1000 pigs, producing approximately 60 cubic meters of manure (including feces, urine, and flushing water from the breeding area) daily with an initial moisture content of 88%. 3 The system is integrated and constructed from a pretreatment module, a solid-liquid separation module, a biological deodorization module, an organic fertilizer preparation module, a heat energy recovery unit, and a central control system. The specific configuration is as follows:

[0062] 1. Preprocessing module: 40m³ 3 The concrete manure buffer tank has a 15mm stainless steel grating installed on the side walls to intercept large particles such as feed bag fragments and stones. The crushing device is a WSP-200 horizontal twin-shaft crusher with 8 sets of staggered toothed crushing blades inside the crushing chamber. The motor power is 5.5kW, and the feed inlet flow rate is 30m³ / h. 3 The submersible pump with a capacity of / h is connected to the buffer tank, and the discharge port is connected to the solid-liquid separation module via a DN150 closed spiral conveying pipe.

[0063] 2. Solid-liquid separation module: Utilizes an RFJ300 screw extrusion separator; the frame, screen cylinder, and auger are all made of 304 stainless steel; the screen cylinder is 2500mm long, the screen mesh size is 0.5mm, and the mesh density is 100 holes / cm². 2 The auger pitch gradually decreases from 200mm to 80mm along the conveying direction; the drive motor power is 7.5kW; and the matching flow rate is 25m³ / h. 3 The system includes a water pump with a capacity of / h and a DN100 overflow pipe (the overflow pipe opening is 1200mm from the outer surface of the casing). The upper end of the casing is equipped with two Φ50mm vent holes, and the side walls are fitted with four hinged cleaning covers with snap-fit ​​fasteners. The solid phase outlet is connected to the organic fertilizer preparation module via an 800mm wide scraper conveyor, and the liquid phase outlet is connected to the biological deodorization module via a DN125 sealed pipe.

[0064] 3. Biological deodorization module: Adopts a three-stage composite sealing structure, handling an air volume of 3000m³. 3 / h. The gas-liquid contact unit is a Φ1800mm spray tower, 4.5m high, with a bottom volume of 1.5m³. 3 The liquid storage tank is equipped with a cyclone demister on top and three layers of corrugated packing (each layer 300mm high) in the middle. Three sets of spray nozzles are installed above the packing layers, with a spray density of 10m³. 3 / (m 2 •h); The biological filter unit measures 3m × 2m × 2.5m. The filter media layer, from bottom to top, consists of a 250mm thick pebble support layer (particle size 30-40mm), a 1000mm thick composite microbial carrier layer (volcanic rock particle size 8-12mm mixed with peat moss at a 1:2 ratio, porosity 60%, specific surface area 135m² / g, loaded with Acinetobacter TAT1-6ACGMCCNo.24567 and powdered Pichia pastoris NHGCGMCCNo.24568, with a total viable count of 3.2 × 10⁻⁶. 9 (CFU / g), 150mm thick activated carbon adsorption layer; the exhaust gas detection and emission unit has a built-in NH3 / H2S dual-parameter sensor and flow transmitter, and is equipped with an audible and visual alarm device.

[0065] 4. Organic fertilizer preparation module: The mixing silo is a Φ2000mm horizontal cylinder with an effective volume of 5m³. 3 It is equipped with a 3kW stirring device (40r / min), and features a conditioner addition port, a liquid addition port, and an online moisture / C / N detector (measurement accuracy ±1%). The aerobic fermentation reactor is a trough-type structure (15m×4m×1.8m), with a built-in hydraulically driven turning mechanism (turning tooth spacing 180mm, moving speed 0.8m / min). The bottom is laid with a DN50 perforated aeration pipe network, and it is equipped with a 7.5kW Roots blower (ventilation volume 0.15m³ / min). 3 / (m 3·min), four sets of temperature sensors and two sets of pH sensors are evenly arranged inside the tank; the post-fermentation chamber is an insulated and airtight structure (10m×5m×2m), with Φ100mm ventilation holes every 1m on the side wall.

[0066] 5. Heat recovery unit: Utilizing Φ32mm stainless steel heat exchange coils (total length 80m), it is embedded in the middle of the material layer of the fermentation reactor. A 1.5kW circulating pump forms a loop with the spray tower's storage tank, with a matching volume of 0.5m³. 3 The insulated water tank has a heat exchange efficiency of ≥85%.

[0067] 6. Central Control System: It adopts an S7-1200 PLC controller, equipped with a 10-inch touch screen. The data acquisition module connects to 18 sensor signals such as temperature, pressure, and liquid level. The output terminal controls 22 actuators and has local / remote dual-mode operation function. The data storage capacity is ≥100,000 records.

[0068] (II) Processing methods and procedures

[0069] 1. Pre-treatment stage: Pig manure waste, after being screened to remove impurities with a particle size >15mm, enters the buffer tank. When the liquid level reaches 80% of the tank volume (approximately 32m³), 3 The submersible pump automatically starts to transport the sewage to the crusher, which crushes it to a particle size of ≤5mm. During the crushing process, the exhaust port continuously exhausts air to balance the pressure. After crushing, the material is sent to the separator through the spiral conveyor pipe.

[0070] 2. Solid-Liquid Separation Stage: Open the separator's vent, and close it after the material fills the screen cylinder. Start the drive motor to make the auger run at 120 r / min. Simultaneously start the water pump to maintain the extrusion pressure at 0.6 MPa (fluctuation range ±0.05 MPa). During the separation process, the overflow pipe automatically adjusts the liquid level in the screen cylinder, continuously producing solid matter with a water content of 52% (approximately 8.5 t / d) and liquid matter containing soluble organic matter (approximately 51.5 m³). 3 / d); After running for 8 hours, open the cleaning cover and use a high-pressure water gun to clean the screen cylinder and auger online. The cleaning wastewater is then returned to the buffer tank.

[0071] 3. Biological deodorization stage: The liquid enters the spray tower and is mixed with the spray liquid (containing 0.2% compound microbial agent, made of brewer's yeast, lactobacillus plantarum, streptomyces sp., and Bacillus subtilis in a 2:2:3:3 ratio, with a total viable count of 2.5 × 10⁻⁶) heated to 32°C by waste heat. 9 The NH3 concentration (CFU / mL) was contacted in the packing layer for 18 minutes, then entered the biofilter unit and remained for 1.5 hours. After microbial degradation, the exhaust gas passed through the activated carbon adsorption and detection unit sequentially. The measured NH3 concentration was 8.6 mg / mL. 3 H2S concentration 0.3 mg / m³ 3Discharge meets standards; the spray liquid in the storage tank is replaced every 24 hours, and the waste liquid and filter pool liquid are transported to the mixing silo through pipelines.

[0072] 4. Organic fertilizer preparation stage: Solid material is fed into the mixing silo, and corn stalk conditioner (crushed to a particle size ≤10mm, approximately 2.1t / d) is added. The reflux liquid from the deodorization system (approximately 6.8m³) is then introduced. 3 / d), after stirring for 20 minutes, adjust the C / N ratio of the material to 25:1 and the moisture content to 55%; after conditioning, the material is sent to the fermentation reactor, and the ventilation system and turning mechanism are started. The fermentation process is carried out in three stages: the heating stage (1.5 days to 68℃), the high-temperature composting stage (5 days to maintain 58-62℃), and the cooling stage (1.5 days to reduce to 42℃). During this period, the material is turned once every 18 hours, and the turning depth is to the bottom of the tank. The temperature (58-62℃) and pH value (7.5-8.0) are recorded every 4 hours; the fermentation product is sent to the post-composting chamber, and the moisture content is controlled at 45%. After 18 days of composting, the finished organic fertilizer is obtained.

[0073] 5. Intelligent Control and Waste Heat Utilization: The central control system monitors the separation pressure in real time, and automatically adjusts the auger speed and water pump flow rate when fluctuations exceed ±0.05MPa; the NH3 concentration in the biological deodorization exhaust gas is monitored to be close to 12mg / m³. 3 When the ambient temperature is 8℃, the spraying frequency is increased to 12 times / hour; when the ambient temperature is 8℃, the heat recovery unit heats the spray liquid to 32℃ to ensure the activity of microorganisms, saving 68% of energy compared with traditional electric heating.

[0074] (III) Processing Results

[0075] Solid-liquid separation efficiency: The organic matter retention rate of solid matter is 86.2%, the COD load of liquid phase is reduced by 32% compared with traditional equipment, and the processing capacity of the separator is stable at 20m³ / h.

[0076] Deodorization effect: Average NH3 concentration in exhaust gas was 7.8 mg / m³. 3 The average H2S concentration was 0.28 mg / m³. 3 It has a deodorization efficiency of ≥95% and produces no secondary pollution.

[0077] Organic fertilizer quality: The finished organic fertilizer has an organic matter content of 48.5%, total nutrients (N+P2O5+K2O) of 5.8%, moisture content of 26%, pH value of 7.2, ascarid egg mortality rate of 98.3%, and fecal coliform count of 3.2×10⁻⁶. 4 The product count / g meets the first-class standard of "Organic Fertilizer" (NY525-2021).

[0078] Operating cost: The cost of treating each ton of manure is 28.6 yuan, which is 35% lower than the traditional segmented treatment process. The annual production of organic fertilizer is about 2,500 tons (calculated based on: 8.5 tons of solid matter after separation + 2.1 tons of conditioner = 10.6 tons / day of mixed materials, with a moisture content of 55%. After 7-10 days of aerobic fermentation and 15-20 days of decomposition, the moisture content drops to below 30%, and the dry matter loss rate is about 15%. The average daily output of finished organic fertilizer is 10.6 tons / day × (1-55%) ÷ (1-30%) × (1-15%) ≈ 6.8 tons / day, and the annual production capacity is 6.8 tons / day × 365 days ≈ 2,500 tons), realizing resource utilization benefits.

[0079] II. Example 2: Manure Treatment System for Large-Scale Beef Cattle Farms

[0080] (a) Differentiated system configuration

[0081] This embodiment is suitable for a large-scale beef cattle farm with a stock of 500 head, which produces approximately 80 cubic meters of manure (including feces, urine, and flushing water from the farming area) daily with an initial moisture content of 82%. 3 Based on Example 1, the following differentiated configurations are made:

[0082] 1. The screen aperture of the solid-liquid separation module is adjusted to 0.75mm, the auger speed is set to 80r / min, and the extrusion pressure is controlled at 0.4MPa. The processing capacity of the matching RFJ300 separator is increased to 30m³. 3 / h.

[0083] 2. The concentration of compound microbial agents in the spray liquid of the biological deodorization module is adjusted to 0.3%, the particle size of volcanic rock in the biological filter carrier is increased to 10-15mm, and the ratio of Acinetobacter to Pichia pastoris in the compound microbial community is adjusted to 1:3 to adapt to the high fiber characteristics of cow manure.

[0084] 3. In the mixing stage of the organic fertilizer preparation module, rice husks are used as a conditioner, the C / N ratio is adjusted to 28:1, and the aerobic fermentation ventilation rate is increased to 0.18m³. 3 / (m 3 The turning frequency was changed to once every 24 hours, and the subsequent composting period was extended to 20 days.

[0085] 4. During the pretreatment stage, a biological enzyme preparation addition device is added to the feed inlet of the crusher to add a compound enzyme preparation containing cellulase and protease (enzyme activity 1200U / g), with the addition amount being 0.08% of the mass of manure.

[0086] (II) Key Processing Results

[0087] 1. After solid-liquid separation, the water content of the solid is 58%, the organic matter retention rate is 83.5%, and the COD concentration of the liquid phase is reduced to 4200 mg / L, which is 28% lower than that of traditional equipment.

[0088] 2. Biological deodorization of exhaust gas NH3 concentration: 10.2 mg / m³ 3 H2S concentration 0.45 mg / m³ 3 It fully meets emission standards and has a 100% liquid phase reuse rate.

[0089] 3. The finished organic fertilizer has an organic matter content of 46.2%, a total nutrient content of 5.3%, and a roundworm egg mortality rate of 97.1%, which meets the requirements of NY525-2021 standard.

[0090] 4. In a low-temperature environment (5℃), the fermentation temperature is stabilized and meets the standard through the waste heat recovery system, saving 72% of energy consumption compared with the traditional heating method, and reducing the cost of treating each ton of manure to 26.3 yuan.

[0091] III. Example 3: System Operation Optimization in Low Temperature Environment

[0092] (a) Special configuration

[0093] Based on Example 1, a 50mm thick polyurethane insulation layer was added to the outer wall of the aerobic fermentation reactor, and a steam preheating device (with a 0.1t / h small steam generator) was added to the feed inlet of the mixing silo to increase the temperature control range of the composite microbial carrier layer of the biological deodorization module to 28-35℃.

[0094] (II) Low-temperature operation performance

[0095] When the ambient temperature drops to -2℃, the temperature of the mixed material is raised to 15℃ by steam preheating. Combined with the recovery of fermentation waste heat, the temperature of the carrier layer of the biofilter is maintained at 30℃. The heating stage of the aerobic fermentation reactor is shortened to 1 day, the temperature of the high-temperature composting stage is stabilized at 55-60℃, the deodorization efficiency of the exhaust gas is maintained at over 94%, the quality of the finished organic fertilizer is not affected by the low temperature, and the overall operational stability of the system is improved by 40% compared with before optimization.

[0096] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An integrated treatment system for livestock manure, comprising solid-liquid separation, biological deodorization, and organic fertilizer preparation, characterized in that: It includes a pretreatment module, a solid-liquid separation module, a biological deodorization module, an organic fertilizer preparation module, a heat energy recovery unit, and a central control system that are linked together in sequence. The pretreatment module includes a manure buffer tank, a bar screen, and a crushing device. The bar screen is located at the feed end of the buffer tank and has a screen size of 10-20mm. It is used to intercept impurities such as stones and plastics with a particle size >20mm in the manure. The crushing device is a horizontal twin-shaft crusher. Its crushing chamber has staggered toothed crushing blades inside, which can crush the manure to a particle size ≤5mm. The feed inlet of the crushing device is connected to the discharge outlet of the buffer tank through a submersible pump. The discharge outlet is connected to the feed inlet of the solid-liquid separation module through a closed spiral conveying pipeline. The solid-liquid separation module adopts a screw extrusion separator, including a frame, a sealed outer shell, a screen cylinder, an auger, and a drive motor. The screen cylinder is located inside the sealed outer shell, with a length of 1500-3000 mm. The screen mesh is made of 304 stainless steel, with a aperture of 0.5-1 mm and a mesh density of 80-120 holes / cm². 2 A water pump is connected to the liquid phase outlet at the bottom of the sealed outer shell. An overflow pipe is provided above the feed pipe, and the distance from the overflow outlet of the overflow pipe to the outer surface of the outer shell is 800-1500mm. Two vent holes that can be opened and closed are provided on the upper end face of the outer shell. Four hinged cleaning covers with buckles are installed on the side wall seal. The auger is driven by a drive motor, and the pitch gradually decreases from 200mm to 80mm along the material conveying direction. The extrusion pressure during separation is 0.3-0.8MPa. The moisture content of the solid after separation is controlled at 40%-65%. The solid phase outlet is connected to the organic fertilizer preparation module through a scraper conveyor, and the liquid phase outlet is connected to the biological deodorization module through a closed pipe. The biological deodorization module is a multi-stage composite sealed structure, comprising a gas-liquid contact unit, a biological filter unit, and an exhaust gas detection and emission unit, with each unit connected in series via a sealed duct. The gas-liquid contact unit is a spray tower structure, with a liquid storage tank at the bottom, a cyclone demister at the top, and three layers of corrugated packing material arranged in a staggered pattern in the middle. A spraying device is installed above the packing material layers, and the spray liquid is an aqueous solution containing 0.1-0.3% composite microbial agent, with a spray density of 8-12 m³ / h. 3 / (m 2 •h), the compound microbial agent includes Saccharomyces cerevisiae, Lactobacillus plantarum, Streptomyces sp., and Bacillus subtilis, with a total viable count ≥2.0 × 10⁻⁶. 9 CFU / mL; the filter media layer of the biofilter unit has a height of 1.2-1.8m, consisting of a pebble support layer (thickness 200-300mm, particle size 20-50mm), a composite microbial carrier layer (thickness 800-1200mm), and an activated carbon adsorption layer (thickness 100-200mm) from bottom to top. The composite microbial carrier is composed of volcanic rock (particle size 5-15mm) and peat moss in a weight ratio of 1:2, and is loaded with a composite microbial community of Acinetobacter TAT1-6A (accession number CGMCC No. 24567) and Pichia farinose NHG (accession number CGMCC No. 24568). The carrier has a porosity ≥55% and a specific surface area ≥120m². 2 / g; The exhaust gas detection and emission unit has a built-in NH3 sensor, H2S sensor and flow sensor, which can monitor the NH3 concentration in the exhaust gas in real time to ≤15mg / m³. 3 H2S concentration ≤1mg / m³ 3 When the concentration exceeds a preset threshold, an audible and visual alarm is triggered. The organic fertilizer preparation module includes a mixing silo, an aerobic fermentation reactor, and a post-composting silo connected in sequence. The mixing silo is a horizontal cylindrical body with a stirring device at a speed of 30-50 r / min. It is equipped with a conditioner addition port, a liquid addition port, and an online moisture / C / N detector, which can adjust the material C / N ratio to 20-30:1 and the moisture content to 50-60%. The conditioner is corn stalks or rice husks crushed to a particle size ≤10mm. The aerobic fermentation reactor is a trough structure with a length of 10-20m, a width of 3-5m, and a depth of 1.5-2.0m. It has a built-in hydraulically driven turning mechanism, which can turn the compost to the bottom of the trough. The turning tooth spacing is 150-200mm. A perforated aeration pipe network is laid at the bottom of the reactor, and forced ventilation is provided by a Roots blower with a ventilation volume of 0.1-0.2m³. 3 / (m 3 The tank is equipped with temperature and pH sensors to control the fermentation temperature at 55-70℃ and the pH value at 7-8.

5. The post-fermentation chamber is a sealed, insulated chamber with ventilation holes to maintain the material moisture content at 40-50% during the fermentation process. The heat recovery unit includes a heat exchange coil, a circulating pump and an insulated water tank. The heat exchange coil is buried in the material layer of the aerobic fermentation reactor. It forms a circulation loop with the storage tank of the gas-liquid contact unit through the circulating pump. The waste heat of 55-70℃ generated by fermentation can be used to heat the spray liquid to 30-35℃. The central control system includes a PLC controller, a touch screen, and a data acquisition module. The data acquisition module is electrically connected to the temperature, pressure, liquid level, ORP value, and gas concentration sensors of each module. The PLC controller is electrically connected to the drive motors, pumps, valves, and fans of each module, and can dynamically adjust the auger speed of the separator (50-150 r / min) and the air volume of the deodorizing fan (1000-5000 m³ / min) according to the amount of sewage to be treated. 3 The system has a fermentation turning frequency (once every 12-24 hours) and data storage and remote monitoring functions.

2. The integrated processing system according to claim 1, characterized in that: The processing capacity of the spiral extrusion separator is adapted to the scale of livestock farming, with a processing capacity of 4-25 cubic meters for pig manure (initial moisture content 85-90%). 3 / hour, the processing capacity for cow manure (initial moisture content 80-85%) is 5-40m³. 3 / hour, during the separation process, the pressure inside the screen cylinder is controlled by a water pump to stabilize at the set value ±0.05MPa.

3. The integrated processing system according to claim 1, characterized in that: The gas-liquid contact unit of the biological deodorization module is equipped with a liquid level sensor and an automatic liquid replenishment device in its storage tank. The spray liquid is replaced every 24 hours, and the waste liquid is transported to the mixing silo through a pipeline as a humidity regulating liquid. The filter layer of the biological filter unit is equipped with a liquid collection tank, which is connected to the mixing silo through a return pipeline to realize the recycling of liquid resources.

4. The integrated processing system according to claim 1, characterized in that: The fermentation process in the aerobic fermentation reactor is divided into three stages: a heating stage (temperature rapidly rises from room temperature to 65-70℃, lasting 1-2 days), a high-temperature composting stage (temperature maintained at 55-65℃, lasting 5-6 days), and a cooling stage (temperature gradually decreases to 40-45℃, maintained for 1-2 days), with a total fermentation cycle of 7-10 days. The composting cycle in the post-composting chamber is 15-20 days. After composting, the organic matter content of the material is ≥45%, the mortality rate of roundworm eggs is ≥95%, and the fecal coliform count is ≤10. 5 per g.

5. The integrated processing system according to claim 1, characterized in that: The buffer tank of the pretreatment module is equipped with a level gauge. When the level reaches 80% of the tank volume, the submersible pump is automatically started to transport the sewage. The cleaning cover of the solid-liquid separation module can be used as an observation port. After opening, the screen cylinder and auger can be cleaned online. The cleaning wastewater is collected and returned to the buffer tank.

6. An integrated treatment method for livestock manure, comprising solid-liquid separation, biological deodorization, and organic fertilizer preparation, characterized in that: Includes the following steps: Pretreatment: Livestock manure (pig manure, cow manure or a mixture thereof) is temporarily stored in a buffer tank. After large particles are intercepted by a grid device with a gap of 10-20mm, it is pumped to a horizontal twin-shaft crusher by a submersible pump. The crushed particles are crushed to a particle size of ≤5mm by toothed crushing blades. During the crushing process, air is discharged from the device through the exhaust port to prevent pressure buildup. Solid-liquid separation: The crushed manure is fed into the screw extrusion separator through a screw conveyor pipeline. The exhaust port is opened to fill the screen cylinder with material and then closed. The drive motor is started to drive the auger to rotate (speed 50-150 r / min). The separation is carried out under a pressure of 0.3-0.8 MPa. At the same time, the water pump is started to extract the separated liquid. During the separation process, the pressure inside the screen cylinder is kept stable through the overflow pipe. Solid matter with a water content of 40%-65% and liquid matter containing soluble organic matter are obtained. When the separation efficiency decreases, the cleaning cover is opened to clean the screen cylinder online. Biological deodorization: The liquid obtained in step 2 is sent to the gas-liquid contact unit of the biological deodorization module, where it comes into full contact with the spray liquid at 30-35℃ in the corrugated packing layer. The amount of compound microbial agent added to the spray liquid is 0.2-0.5% of the liquid's mass, and the contact time is 15-20 minutes. Subsequently, the gas-liquid mixture enters the biological filter unit, where the liquid remains in the composite microbial carrier layer for 1-2 hours. Organic matter is degraded through the synergistic effect of Acinetobacter TAT1-6A and Pichia pastoris NHG. The temperature inside the carrier layer is maintained at 25-35℃. The treated exhaust gas is further purified by the activated carbon adsorption layer and is discharged after passing the exhaust gas detection unit. If it fails the test, an alarm is triggered and the gas is returned to the biological filter unit for retreatment. Organic fertilizer preparation: Mixing and conditioning: The solid material obtained in step 2 is sent into the mixing silo, corn stalks or rice husk conditioner is added, and the return liquid from the biological deodorization module is introduced at the same time. The stirring device is started (30-50 r / min) and stirred evenly. The C / N ratio of the material is adjusted to 20-30:1 and the moisture content is adjusted to 50-60% by online detection. Aerobic fermentation: The conditioned material is fed into the aerobic fermentation reactor, and the Roots blower is started for forced ventilation (ventilation volume 0.1-0.2 m³ / h). 3 / (m 3 The turning mechanism, controlled by a PLC controller, turns the material once every 12-24 hours, reaching the bottom of the tank to ensure uniform oxygen supply. The fermentation process is carried out in three stages: heating up to 65-70℃ for 1-2 days, high-temperature composting at 55-65℃ for 5-6 days, and cooling down to 40-45℃ for 1-2 days. During this period, the temperature and pH value are monitored in real time. When the temperature is below 55℃, the ventilation is increased, and when the pH value is above 8.5, conditioning agents are added. Post-composting: The fermentation products are sent into the post-composting chamber. The chamber is kept ventilated, and the moisture content of the material is controlled at 40-50%. After 15-20 days of composting, the finished organic fertilizer is obtained. Intelligent control and waste heat utilization: The central control system collects the operating parameters of each module in real time. When the pressure fluctuation of the solid-liquid separation module exceeds ±0.05MPa, the screw conveyor speed and water pump flow rate are adjusted. When the exhaust gas concentration of the biological deodorization module exceeds the standard, the spraying frequency and the amount of bacterial agent added are increased. When the ambient temperature is below 10℃, the waste heat from fermentation is used to heat the spray liquid through the heat recovery unit to ensure that the activity of the biological community and the fermentation temperature meet the standards.

7. The integrated processing method according to claim 6, characterized in that: The inoculation amount of the composite microbial community in step 3 is 0.5-1.0% of the liquid mass, wherein the ratio of viable Acinetobacter TAT1-6A to Pichia pastoris NHG is 1:2-3, and the empty bed residence time of the biofilter unit is 60-90s.

8. The integrated processing method according to claim 6, characterized in that: In step 4, the aeration network pressure of the aerobic fermentation reactor is 0.02-0.05 MPa, the turning mechanism moves at a speed of 0.5-1.0 m / min, and temperature and pH data are recorded every 4 hours during the fermentation process. The data is automatically stored and reports are generated by the central control system.

9. The integrated processing method according to claim 6, characterized in that: Suitable for ambient temperatures of 0℃-40℃. When treating high-viscosity manure (viscosity > 500 mPa·s), add 0.05-0.1% of biological enzyme preparation (containing cellulase and protease, enzyme activity ≥ 1000 U / g) by mass of manure during the pretreatment stage to improve crushing and separation efficiency.

10. The integrated processing method according to claim 6, characterized in that: Finished organic fertilizer must meet the standards of "Organic Fertilizer" (NY525-2021), in which organic matter (on a dry basis) ≥45%, total nutrients (N+P2O5+K2O, on a dry basis) ≥5.0%, moisture (free water) ≤30%, and pH value 5.5-8.5.

Images