Perishable garbage biological drying treatment system and start-up and commissioning method thereof

Abstract

The application relates to a perishable garbage biological drying treatment system and a starting debugging method thereof. The application is suitable for the technical field of perishable garbage biological drying treatment. The technical scheme adopted by the application comprises the following: a cylinder body, the inside of which comprises at least an A layer fermentation unit, a B layer fermentation unit and a C layer fermentation unit; a stirring system arranged in each fermentation unit and used for realizing global stirring and mixing of materials in the fermentation unit; an air supply and exhaust system used for uniformly supplying oxygen to the inside of fermentation materials and leading out water vapor and waste gas generated in fermentation; a temperature sensor used for collecting the temperature in the fermentation unit and capable of being linked with the stirring system and the air supply and exhaust system; a transfer system used for transferring mixed fermentation materials sent out from the feeding and discharging ports of the fermentation units into the next fermentation unit in a preset order; a material height sensor used for collecting the height of the mixed fermentation materials in the fermentation unit; and a material distribution device used for uniformly spreading the materials entering the fermentation unit through the material distribution device into the bunker.

Description

Technical Field

[0001] This invention relates to a biological drying treatment system for perishable waste and its start-up and commissioning method. It is applicable to the field of biological drying treatment technology for perishable waste. Background Technology

[0002] Due to its high moisture and organic matter content, perishable waste has a much lower calorific value than combustible components such as plastics. Direct incineration affects incineration efficiency and requires the addition of auxiliary fuels. Combustion with other waste also increases harmful byproducts such as dioxins. Currently, composting and anaerobic fermentation are the main methods for treating perishable waste. However, my country's perishable waste is characterized by high salt, high oil, high moisture content, and diverse types. Compost products are of poor quality and difficult to guarantee, and the biogas residue and slurry produced by anaerobic digestion are even more difficult to treat. To address the challenges of perishable waste treatment, biological drying technology has flourished in recent years. This technology rapidly removes moisture through biological fermentation, requires minimal external heat energy, and has a significant volume reduction effect. The low-moisture products can be used as incineration aids or to generate waste-derived fuels, showing broad market application prospects.

[0003] According to the inventor's proposed "A Biochemical Drying System for Perishable Waste and Its Operation Method" (ZL202410706473.7), the system achieves thorough mixing of materials within the silo through layered staggered discharge and mixed feeding circulation, aiming at dehydration and volume reduction. It cultivates and acclimates a single high-temperature fermentation microbial community, simplifies the fermentation process, and significantly increases the drying speed of perishable waste, making it suitable for large-scale drying of perishable waste. However, because this biochemical drying system for perishable waste differs significantly from existing windrow and drum drying processes, existing start-up and commissioning methods are not applicable. Therefore, to ensure the effective promotion of this biochemical drying system, a start-up and commissioning method suitable for this novel biochemical drying system for perishable waste is urgently needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a biological drying treatment system for perishable waste and its start-up and commissioning method, in view of the above-mentioned problems.

[0005] The technical solution adopted in this invention is: a biological drying treatment system for perishable waste, comprising: The cylinder is a vertically arranged cylindrical sealed chamber, which includes at least fermentation unit A, fermentation unit B and fermentation unit C. Each fermentation unit has multiple inlet and outlet ports evenly distributed on its side wall, and a baffle is set for each inlet and outlet port. A stirring system is installed in each fermentation unit to achieve full-area stirring and mixing of materials within the fermentation unit; The air supply and exhaust system is installed in each fermentation unit to uniformly deliver oxygen into the fermentation material and to exhaust the water vapor and waste gas generated during fermentation. Temperature sensors are installed in each fermentation unit to collect the temperature inside the fermentation unit and can be linked with the stirring system and the air supply and exhaust system to maintain the temperature inside the fermentation unit within a preset temperature range. The transfer system is used to transport the mixed fermentation materials sent out of the inlet and outlet of the fermentation unit to the next fermentation unit in a preset order; Material height sensors are installed in each fermentation unit to collect the height of the mixed fermentation material in the fermentation unit. They can also be linked with the gate and transfer system to send the material in the fermentation unit to the next fermentation unit in a preset order when the material height in the fermentation unit is greater than the preset height. A material spreading device is installed inside the fermentation unit of layer A, and is used to evenly spread the material entering the fermentation unit through the material spreading device into the silo.

[0006] By employing the aforementioned technical means and adopting a vertical multi-layer fermentation unit structure, layered fermentation and control of materials are achieved, solving the problems of material caking and uneven temperature distribution that are prone to occur in traditional single-compartment fermentation. Through the synergistic effect of the stirring system and the air supply and exhaust system, the mass and heat transfer of materials and oxygen supply are enhanced, accelerating the biological drying process. Through the linkage of material height sensors with the gate and transfer system, automatic layered conveying and circulation of materials are achieved without manual intervention. Through the linkage control of temperature sensors, a high-temperature fermentation environment is precisely maintained, ensuring the activity of the microbial community.

[0007] As a preferred embodiment, the stirring system includes a blade-type auger and a rotary drive device fixedly installed at the center of the fermentation unit. The blade-type auger is connected to the rotary drive device and can rotate 360 ​​degrees in both directions around the central axis of the cylinder.

[0008] Through the above-mentioned technical means, the blade-type auger can achieve 360-degree forward and reverse rotation, realizing full-area stirring without dead corners within the fermentation unit, effectively breaking the material caking state, and fully mixing the fresh material with the fermentation material. At the same time, it enhances the gas-solid-liquid three-phase mass and heat transfer, and improves the water evaporation efficiency and fermentation uniformity.

[0009] As a preferred embodiment, the air supply and exhaust system includes a plurality of aeration holes formed on the surface of the blade-type auger, and an aeration device connected to the aeration holes to supply oxygen.

[0010] By integrating aeration holes onto the mixing blades using the aforementioned techniques, oxygen can be directly supplied to the material during the mixing process, resulting in a more uniform oxygen distribution. This avoids the problem of oxygen deficiency in the upper layer that is common with traditional bottom aeration, and significantly improves the efficiency of aerobic fermentation.

[0011] As a preferred embodiment, the air supply and exhaust system includes several air intake holes formed on the surface of the blade-type auger, and an air intake device connected to the air intake holes, through which the water vapor and exhaust gas generated during fermentation are discharged.

[0012] Through the above-mentioned technical means, water vapor and waste gas are simultaneously drawn in during the stirring process, which accelerates the evaporation of moisture inside the material and timely discharges harmful gases produced during fermentation, thus avoiding the accumulation of odors and the occurrence of anaerobic fermentation.

[0013] As a preferred embodiment, the air supply and exhaust system further includes a central annular pipe, which is arranged in a ring along the inner wall of the fermentation unit.

[0014] As a preferred embodiment, the transfer system includes a material collection device arranged around the cylinder, a guide rail fixedly arranged vertically along the cylinder, and a maintenance and discharge platform respectively corresponding to each fermentation unit. The material collection device slides along the guide rail and can move back and forth between the maintenance and discharge platforms of each layer to receive the materials sent out from the inlet and outlet and transport them to the target fermentation unit.

[0015] Through the above-mentioned technical means, automatic vertical circulation of materials between different fermentation units is realized, ensuring the continuity and stability of material circulation.

[0016] As a preferred option, it also includes: The exhaust gas treatment system is fixedly installed at the top of the cylinder and works in conjunction with the exhaust gas supply system to collect and purify the exhaust gas generated during fermentation.

[0017] By using the above-mentioned technical means, the waste gas generated during fermentation is centrally purified to ensure that the waste gas is discharged in compliance with standards, avoid environmental pollution, and meet environmental protection requirements.

[0018] As a preferred embodiment, the fermentation units of layers A, B, and C each have four inlet and outlet ports, and the four inlet and outlet ports of each layer are evenly distributed at equal intervals along the circumference of the cylinder; the baffles at multiple inlet and outlet ports of the same layer are opened and closed alternately in a preset order to achieve alternating feeding and discharging of materials in the same layer.

[0019] Through the above-mentioned technical means, the alternating feeding and discharging of materials at multiple ports on the same layer can make the materials more evenly distributed in the fermentation unit, avoid local accumulation caused by single-point feeding, and improve feeding and discharging efficiency.

[0020] As a preferred embodiment, the fermentation unit A, fermentation unit B, and fermentation unit C are arranged sequentially from top to bottom; the fermentation unit A is provided with a top feed inlet that cooperates with the material distribution device.

[0021] Through the above-mentioned technical means, the top-to-bottom layered structure conforms to the natural settling law of materials, which facilitates the vertical circulation of materials; the top feed inlet works in conjunction with the material distribution device to achieve the uniform spreading of fresh materials, laying the foundation for stable fermentation.

[0022] A startup and commissioning method for the biodegradable waste biological drying treatment system includes the following steps: S1: Take the fermentation material from the high-temperature zone of the windrow or drum composting process as the exogenous starter bacteria, and transport it from the inlet and outlet of the C-layer fermentation unit to the bottom of the cylinder; crush fresh perishable waste into 3-5cm particle size, and alternately feed it into the cylinder from multiple inlets and outlets of the C-layer with the exogenous starter bacteria; start the stirring system to mix the materials, and simultaneously turn on the air supply and exhaust system to supply oxygen and extract the water vapor and waste gas generated during fermentation; S2: When the height of the mixture in layer C rises to the preset first height, the mixture is transported to layer B through the transfer system, and the mixture is fed alternately from multiple inlets and outlets in layer B; the stirring system and the air supply and exhaust system are continuously linked to maintain the fermentation temperature; S3: When the height of the mixture in layer B rises to the preset second height, the mixture is transported to layer A through the transfer system, and fed alternately from multiple inlets and outlets in layer A; the stirring system and the air supply and exhaust system are continuously linked to maintain the fermentation temperature; S4: When the height of the mixed materials in layer A rises to the preset third height, stop adding external starter bacteria; after mixing the materials in layers C and B with fresh crushed perishable waste, spread them evenly to the fermentation unit in layer A through the transfer system and top spreading device; and operate the mixing system and air supply and exhaust system of layers C, B and A in conjunction to maintain the fermentation temperature. S5: After the system is running stably, control the fermentation units of layer A, layer B and layer C to discharge materials in a staggered manner. The discharged materials are mixed with fresh crushed perishable waste and then fed into the top feeding device. The entire system's stirring, aeration and waste gas treatment are linked to maintain the fermentation temperature. After the start-up and commissioning are completed, the system enters the stable operation stage.

[0023] By employing the aforementioned technical means, highly efficient fermentation bacteria can be rapidly introduced using mature high-temperature composting materials, significantly shortening the system start-up cycle; through layer-by-layer feeding and material circulation, the high-temperature bacteria that are adapted to this system can be gradually domesticated.

[0024] The beneficial effects of this invention are: This invention adopts biological drying technology, which utilizes high-temperature aerobic fermentation to generate heat to achieve rapid dehydration of materials without the need for external heating. The dried products can be used as waste-derived fuel, avoiding the problems of poor quality of traditional compost products, difficulty in treating anaerobic fermentation sludge and slurry, and low efficiency and many harmful products of direct incineration.

[0025] This invention introduces mature composting materials from high-temperature zones as exogenous microorganisms, combined with a layer-by-layer progressive feeding and material circulation strategy, to rapidly establish a high-temperature fermentation environment, acclimate the system's exclusive microbial community, and shorten the start-up and commissioning cycle.

[0026] This invention enhances material mixing and mass and heat transfer by using a blade-type auger for 360-degree forward and reverse mixing, integrating aeration / suction holes in the auger, and employing multi-layer alternating feeding and discharging with vertical circulation. This improves the temperature uniformity inside the cylinder and effectively prevents material caking.

[0027] This invention achieves coordinated control of material height sensor, temperature sensor, baffle, stirring system, air supply and exhaust system, and transfer system without manual intervention, reducing operating costs and human error, and facilitating system standardization and large-scale promotion. Attached Figure Description

[0028] Figure 1 This is an overall cross-sectional view of the biodegradable waste biological drying treatment system of the present invention.

[0029] Figure 2 This is a schematic diagram of the arrangement of the transfer system in this invention.

[0030] Figure 3 yes Figure 1 Section 1-1.

[0031] Figure 4 yes Figure 1 Section 2-2.

[0032] Figure 5 yes Figure 1 Section 3-3.

[0033] 1. Cylinder; 2. Transfer system; 3. Mixing system; 4. Supply and exhaust system; 5. Material distribution device; 6. Waste gas treatment system; 201. Inlet and outlet; 202. Baffle gate; 203. Material collection device; 204. Guide rail; 205. Inspection and discharge platform; 301. Blade-type auger; 302. Rotary drive device; 4021. Aeration and suction fan; 4022. Aeration and suction pipe; 4023. Central annular pipe; 4024. Suction pipe. Detailed Implementation

[0034] This embodiment describes a biological drying treatment system for perishable waste, including a cylinder, a stirring system, an exhaust system, a temperature sensor, a transfer system, a material height sensor, a material distribution device, an exhaust gas treatment system, and a data processing unit.

[0035] In this example, the cylinder is a vertically arranged, sealed cylindrical chamber, internally divided into three independent fermentation units from top to bottom: layer A, layer B, and layer C. Each fermentation unit has four inlet / outlet ports evenly distributed circumferentially along its sidewalls: A1-A4, B1-B4, and C1-C4. Each inlet / outlet is equipped with an electrically controlled automatic opening and closing gate. The top of the layer A fermentation unit has a top inlet, and a material distribution device is installed above the top inlet within the layer A fermentation unit to align with it.

[0036] In this embodiment, a stirring system is installed in each fermentation unit, including a blade-type auger and a rotary drive device. The rotary drive device is fixedly installed at the center of the corresponding fermentation unit, and the middle part of the blade-type auger is connected to the rotary drive device, allowing it to rotate 360 ​​degrees in both forward and reverse directions around the central axis of the cylinder. The blades of the blade-type auger have several through holes on their surface, which can serve as aeration holes and suction holes for the air supply and exhaust system.

[0037] In this embodiment, the air supply and exhaust system includes an aeration and suction fan, an aeration and suction pipe, a central annular pipe, and a suction pipe. The aeration and suction fan serves as both an aeration and suction device, allowing switching between aeration and suction modes, with aeration and suction performed separately. The blade-type auger has an internal ventilation chamber, with all through-holes on the blade surface communicating with this chamber. The ventilation chamber is connected to the central annular pipe via the aeration and suction pipe. The central annular pipe runs around the inner wall of the corresponding fermentation unit and is connected to the aeration outlet and suction inlet of the aeration and suction fan via a main pipe. One end of the suction pipe is connected to the exhaust outlet of the aeration and suction fan, and the other end is connected to the air inlet of the top waste gas treatment system.

[0038] In this example, multiple temperature sensors are evenly distributed within each fermentation unit to collect real-time fermentation temperatures at different locations. The temperature sensors are electrically connected to the system control cabinet. When the temperature exceeds 65℃, the suction volume of the aeration fan is automatically increased; when the temperature falls below 55℃, the suction volume is automatically decreased to maintain the fermentation temperature between 55℃ and 65℃.

[0039] In this embodiment, the transfer system includes four sets of material collection devices, four vertical guide rails, and three maintenance discharge platforms. The four guide rails are fixedly arranged at equal intervals along the circumference of the cylinder on its outer side. Each set of material collection devices corresponds to one guide rail and can move back and forth between the maintenance discharge platforms on layers C, B, and A. The maintenance discharge platforms are respectively located on the outer side of the inlet and outlet of each layer, facilitating the material collection vehicle's receiving and unloading of materials.

[0040] In this embodiment, a material height sensor is installed in each fermentation unit to detect the material height within the fermentation unit. When the material height reaches a preset threshold, the corresponding gate is automatically triggered to open, and the material collection cart is controlled to transport the material to the target fermentation unit.

[0041] In this example, the feeding device is a rotary centrifugal feeder, which is fixedly installed inside the fermentation unit of layer A, below the top feed inlet. Its rotation axis coincides with the central axis of the cylinder, and the feeding radius covers the entire cross-section of the fermentation unit of layer A.

[0042] In this embodiment, the data processing unit is electrically connected to all sensors, dampers, stirring system, air supply and exhaust system, transfer system, material distribution device, and waste gas treatment system to achieve automatic linkage control of the entire system. The data processing unit has a built-in data storage module and an anomaly alarm module, which can record all historical data of system operation and issue audible and visual alarms when equipment malfunctions or fermentation parameters are abnormal.

[0043] The startup and commissioning method of the biodegradable waste biological drying treatment system in this embodiment specifically includes the following steps: S1: Take fermentation material from the high-temperature zone of a local composting plant as an exogenous starter culture; transport the exogenous culture to the bottom of the cylinder alternately through the C1-C4 inlet / outlet of layer C; at the same time, crush fresh perishable waste to a particle size of 3-5cm using a crusher, and feed it into the cylinder alternately with the exogenous culture through the inlet / outlet of layer C.

[0044] Start the C-layer mixing system to thoroughly mix the exogenous bacteria with the fresh waste. Simultaneously turn on the C-layer air supply and exhaust system, switch the aeration and suction fans to aeration mode, and switch to suction mode after a certain period of aeration to extract the water vapor and waste gas generated during fermentation and send them to the waste gas treatment system.

[0045] S2: When the material height in layer C reaches the preset first height (the material height affects the opening and closing of the inlet and outlet gates in layer C), the material height sensor triggers the opening of the inlet and outlet gates in layer C. The mixing system in layer C drives the material to be discharged alternately from the inlet and outlet gates C1-C4. After the material is received by the collection vehicle, it is transported along the guide rail to the maintenance and discharge platform in layer B, and then fed alternately from the inlet and outlet gates B1-B4.

[0046] Exogenous bacteria and fresh perishable waste are continuously added to layer C; the mixing system and air supply and exhaust system of layer B are started simultaneously, with operating parameters consistent with those of layer C, and the fermentation temperature is maintained at 55~65℃.

[0047] S3: When the material height in layer B reaches the preset second height (the material height affects the opening and closing of the inlet and outlet gates in layer B), the gates in layer B are triggered to open, and the material is transported to the maintenance and discharge platform in layer A via the collection car, and is fed alternately from the inlet and outlet gates A1-A4.

[0048] During the process, the fermentation material and crushed perishable waste in the high-temperature zone of the windrow or drum composting process are fed alternately from the inlet and outlet ports of layer A (B1, B2, B3, and B4). The mixing and aeration systems of layers C and B operate in conjunction to maintain the fermentation temperature at 55-65℃.

[0049] S4: When the material height in layer A reaches the preset third height (the material height affects the opening and closing of the inlet and outlet gates in layer A), stop adding external starter bacteria. Mix the materials alternately discharged from layers C and B with fresh crushed perishable waste, and then transport them to the top inlet of layer A through a transfer system. The mixture is then evenly spread to the fermentation unit in layer A by a spreading device.

[0050] In this step, layers C and B adopt an alternating discharge mode. The stirring system and air supply and exhaust system of layers C, B and A are fully linked to maintain the fermentation temperature of each layer at 55~65℃.

[0051] S5: After continuous operation for a certain period of time, the temperature, oxygen concentration, and material moisture content of each layer of the system stabilize within the preset range, indicating that the system is operating stably.

[0052] After the system stabilizes, the fermentation units of layers A, B, and C discharge materials in an alternating manner. Through repeated discharge and feeding, the materials inside the fermentation chamber are mixed as a whole. After the crushed perishable waste is mixed with the discharged material, it enters the processing unit from the material distribution device located at the top of the cylinder. The mixing system, air supply and exhaust system, and waste gas treatment system operate in conjunction to maintain the fermentation temperature inside the cylinder at 55~65℃. After the start-up and commissioning are completed, the system enters the stable operation stage.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A biological drying treatment system for perishable waste, characterized in that, include: The cylinder is a vertically arranged cylindrical sealed chamber, which includes at least fermentation unit A, fermentation unit B and fermentation unit C. Each fermentation unit has multiple inlet and outlet ports evenly distributed on its side wall, and a baffle is set for each inlet and outlet port. A stirring system is installed in each fermentation unit to achieve full-area stirring and mixing of materials within the fermentation unit; The air supply and exhaust system is installed in each fermentation unit to uniformly deliver oxygen into the fermentation material and to exhaust the water vapor and waste gas generated during fermentation. Temperature sensors are installed in each fermentation unit to collect the temperature inside the fermentation unit and can be linked with the stirring system and the air supply and exhaust system to maintain the temperature inside the fermentation unit within a preset temperature range. The transfer system is used to transport the mixed fermentation materials sent out of the inlet and outlet of the fermentation unit to the next fermentation unit in a preset order; Material height sensors are installed in each fermentation unit to collect the height of the mixed fermentation material in the fermentation unit. They can also be linked with the gate and transfer system to send the material in the fermentation unit to the next fermentation unit in a preset order when the material height in the fermentation unit is greater than the preset height. A material spreading device is installed inside the fermentation unit of layer A, and is used to evenly spread the material entering the fermentation unit through the material spreading device into the silo.

2. The biological drying treatment system for perishable waste according to claim 1, characterized in that, The stirring system includes a blade-type auger and a rotary drive device fixedly installed at the center of the fermentation unit. The blade-type auger is connected to the rotary drive device and can rotate 360 ​​degrees in both directions around the central axis of the cylinder.

3. The biological drying treatment system for perishable waste according to claim 2, characterized in that, The air supply and exhaust system includes several aeration holes opened on the surface of the blade auger, and an aeration device connected to the aeration holes to supply oxygen.

4. The biological drying treatment system for perishable waste according to claim 2, characterized in that, The air supply and exhaust system includes several air intake holes opened on the surface of the blade-type auger, and an air intake device. The air intake device is connected to the air intake holes and exhausts the water vapor and waste gas generated during fermentation through the aeration holes.

5. The biological drying treatment system for perishable waste according to claim 3 or 4, characterized in that, The gas supply and exhaust system also includes a central annular pipe, which is arranged in a circle along the inner wall of the fermentation unit.

6. The biological drying treatment system for perishable waste according to claim 1, characterized in that, The transfer system includes a material collection device arranged around the cylinder, a guide rail fixed vertically along the cylinder, and a maintenance and discharge platform corresponding to each fermentation unit. The material collection device slides along the guide rail and can move back and forth between the maintenance and discharge platforms of each layer to receive the materials sent out from the inlet and outlet and transport them to the target fermentation unit.

7. The biological drying treatment system for perishable waste according to claim 1, characterized in that, Also includes: The exhaust gas treatment system is fixedly installed at the top of the cylinder and works in conjunction with the exhaust gas supply system to collect and purify the exhaust gas generated during fermentation.

8. The biological drying treatment system for perishable waste according to claim 1, characterized in that, Each of the fermentation units in layers A, B, and C has four inlets and four outlets, which are evenly distributed at equal intervals along the circumference of the cylinder. The gates at multiple inlets and outlets in the same layer open and close alternately in a preset order to achieve alternating feeding and discharging within the same layer.

9. The biological drying treatment system for perishable waste according to claim 1, characterized in that, The fermentation units A, B, and C are arranged sequentially from top to bottom; the top of the fermentation unit A is provided with a top feed inlet that cooperates with the material distribution device.

10. A start-up and commissioning method for a biodegradable waste biological drying treatment system as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1: Take the fermentation material from the high-temperature zone of the windrow or drum composting process as the exogenous starter bacteria, and transport it from the inlet and outlet of the C-layer fermentation unit to the bottom of the cylinder; crush fresh perishable waste into 3-5cm particle size, and alternately feed it into the cylinder from multiple inlets and outlets of the C-layer with the exogenous starter bacteria; start the stirring system to mix the materials, and simultaneously turn on the air supply and exhaust system to supply oxygen and extract the water vapor and waste gas generated during fermentation; S2: When the height of the mixture in layer C rises to the preset first height, the mixture is transported to layer B through the transfer system, and the mixture is fed alternately from multiple inlets and outlets in layer B; the stirring system and the air supply and exhaust system are continuously linked to maintain the fermentation temperature; S3: When the height of the mixture in layer B rises to the preset second height, the mixture is transported to layer A through the transfer system, and fed alternately from multiple inlets and outlets in layer A; the stirring system and the air supply and exhaust system are continuously linked to maintain the fermentation temperature; S4: When the height of the mixed materials in layer A rises to the preset third height, stop adding external starter bacteria; after mixing the materials in layers C and B with fresh crushed perishable waste, spread them evenly to the fermentation unit in layer A through the transfer system and top spreading device; and operate the mixing system and air supply and exhaust system of layers C, B and A in conjunction to maintain the fermentation temperature. S5: After the system is running stably, control the fermentation units of layer A, layer B and layer C to discharge materials in a staggered manner. The discharged materials are mixed with fresh crushed perishable waste and then fed into the top feeding device. The entire system's stirring, aeration and waste gas treatment are linked to maintain the fermentation temperature. After the start-up and commissioning are completed, the system enters the stable operation stage.

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