An in-situ closed-loop treatment system for perishable waste with both production capacity and high value-added products

Abstract

The present invention discloses an in-situ closed-loop treatment system for perishable garbage with both production capacity and high value-added products, including a garbage crushing device, a material tank, a dry anaerobic digestion reactor, a solid-liquid separator, an aerobic composting reactor and an odor treatment device; the dry anaerobic digestion reactor is connected to the solid-liquid separator through a conveying pipeline, a material pump is provided on the conveying pipeline, and the solid-liquid separator and the odor treatment device are connected to the odor treatment device through a deodorizing gas pipeline. The present invention adopts the coupling of anaerobic digestion and aerobic composting core technologies to greatly improve the conversion rate of various types of perishable garbage and the energy yield of biogas; the aerobic composting reactor adopts a layer-by-layer falling structure to shorten the composting time and improve the quality of the compost product. At the same time, it is supplemented by an odor purification technology unit, and the biogas liquid is reused and self-consumed, so as to realize the reduction of perishable garbage source and clean co-production, obtain clean energy, high-quality organic fertilizer and soil conditioner, and realize closed-loop control without secondary pollution of the treatment system.

Description

Technical Field

[0001] The present invention relates to the field of waste treatment, and in particular to an in-situ closed-loop treatment system for perishable waste with both production capacity and high value-added products. Background Art

[0002] The amount of perishable waste generated in life is large and scattered in various communities, vegetable markets, catering business districts and canteens of factories, enterprises and institutions. Even if the garbage classification policy is successfully implemented, the resource processing of perishable waste still requires a series of processes such as collection, transportation and storage. The garbage collection and transportation process is often very easy to cause secondary pollution such as sewage leakage and odor emission along the way.

[0003] The treatment and disposal technologies for urban perishable waste in my country are mainly waste incineration power generation and sanitary landfill, supplemented by aerobic composting and anaerobic digestion and other resource-based treatment methods in some areas. However, pollutants such as POPs released during the incineration process pollute the air environment, and the high moisture and low calorific value characteristics of urban perishable waste lead to the complexity of the perishable waste incineration process, which also affects the efficiency and economic benefits of waste incineration. In addition, although landfilling is simple to treat perishable waste, it occupies a large amount of land, and various odorous gases and leachate containing multiple heavy metals and organic matter complex pollution released during the landfill process require further treatment. Summary of the invention

[0004] The purpose of the present invention is to provide an in-situ closed-loop treatment system for perishable garbage with both production capacity and high value-added products, so as to solve the problems of environmental pollution and resource waste in existing garbage treatment methods.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention discloses an in-situ closed-loop treatment system for perishable garbage with both production capacity and high value-added products, comprising a garbage crushing device, a material tank, a dry anaerobic digestion reactor, a solid-liquid separator, an aerobic composting reactor and an odor treatment device arranged in sequence according to the garbage treatment sequence; the dry anaerobic digestion reactor is connected to the solid-liquid separator through a conveying pipeline, a material pump is provided on the conveying pipeline, and the solid-liquid separator and the odor treatment device are connected to the odor treatment device through a deodorizing gas pipeline;

[0007] The garbage crushing device crushes perishable garbage into granular garbage materials, and conveys the granular garbage materials to the material tank for temporary storage through the conveying device. The dry anaerobic digestion reactor stirs and performs anaerobic digestion reaction on the granular garbage materials stored in the material tank to produce biogas, biogas residue and biogas. The biogas slurry and biogas residue are conveyed to the solid-liquid separator by the material pump through the conveying pipeline for separation. The biogas residue after separation is processed into organic fertilizer by the aerobic composting reactor. The odor generated during the operation of the aerobic composting reactor and the solid-liquid separator is conveyed to the odor treatment device through the deodorizing gas pipeline for purification.

[0008] Furthermore, the dry anaerobic digestion reactor is connected to a biogas storage tank through a biogas pipeline, and the biogas generated by the dry anaerobic digestion reactor is transported to the biogas storage tank through the biogas pipeline for storage;

[0009] The solid-liquid separator is connected to the material tank through a biogas slurry return pipe, and the biogas slurry after separation flows back to the material tank through the biogas slurry return pipe for biogas slurry reuse.

[0010] Further, the dry anaerobic digestion reactor comprises a digestion reactor shell and a reactor head sealed and connected to both ends of the digestion reactor shell, a first feed port is arranged at the upper left end of the digestion reactor shell, a biogas outlet is arranged at the upper right end of the digestion reactor shell, the biogas outlet is communicated with the biogas pipeline, a first discharge port is arranged at the lower right end of the digestion reactor shell, and a spiral mixing and propulsion agitator, a partition plate and a plurality of groups of relatively arranged anode plates and cathode plates are arranged in the digestion reactor shell;

[0011] The rotating shaft of the spiral mixing propeller is rotatably connected to the reactor heads on both sides; the partition plate is located in the middle of the digestion reactor shell, and the partition plate is fixedly connected to the side wall of the lower half of the digestion reactor shell.

[0012] Furthermore, the partition plate is provided with a plurality of liquid flow holes.

[0013] Furthermore, the digestion reactor shell adopts a double-layer jacket structure, and the outer wall of the digestion reactor shell is provided with a medium inlet and a medium outlet for heat exchange medium to flow into and out of the double-layer jacket structure;

[0014] A pH probe and a first temperature probe are arranged on the two reactor heads.

[0015] Furthermore, an exogenous electron mediator is added into the digestion reactor shell.

[0016] Furthermore, the aerobic composting reactor comprises a composting reactor shell, the top of which is provided with a second feed inlet and an air outlet, the air outlet being connected to the odor treatment device through an air duct; the bottom of the composting reactor shell is provided with a second feed outlet and an air inlet;

[0017] A plurality of support plates which can be pulled outward are arranged from top to bottom in the composting reactor shell, each support plate is provided with a plurality of air holes, and a material scraper and a second temperature probe are arranged above each support plate;

[0018] A material distributor is arranged above the supporting plate at the top, and the material distributor is connected to the first driving motor installed on the top of the composting reactor shell.

[0019] Furthermore, the second feed port and the second discharge port are both hinged with baffles, and the hinge shaft of the baffle is provided with a torsion spring for driving the baffle to return to its original position;

[0020] Both sides of each support plate are connected to the inner wall of the composting reactor shell through slide rails.

[0021] Furthermore, the air inlet is connected to the heat exchanger outlet through an air duct, and the heat exchanger inlet is connected to the material tank through an air duct.

[0022] Furthermore, a plurality of pulling-out drive components for driving the trays to be pulled out are arranged on the outer wall of the composting reactor shell, each pulling-out drive component corresponds to each tray one by one, and the pulling-out drive component includes two racks installed side by side on the bottom surface of the tray, the racks are meshed with the gears below, and the gears are connected to the power of the second driving motor installed on the outer wall of the composting reactor shell.

[0023] Compared with the prior art, the beneficial technical effects of the present invention are:

[0024] The present invention couples the core technologies of anaerobic digestion and aerobic composting. The anaerobic digestion reactor greatly improves the conversion rate of various types of perishable garbage and the energy yield of biogas through the stimulation of micro-electric fields in coordination with exogenous electron mediators. The interior of the aerobic composting reactor adopts a layer-by-layer falling structure to shorten the composting time and improve the quality of compost products. At the same time, it is assisted by an odor purification technology unit, and the biogas slurry is reused and self-consumed to achieve source reduction of perishable garbage and clean co-production. While solving the problem of "garbage siege" in cities, the present invention obtains clean energy, high-quality organic fertilizers and soil conditioners, and realizes closed-loop control of the treatment system without secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1It is a schematic diagram of the operation of the in-situ closed-loop treatment system for perishable waste with both production capacity and high value-added products of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the dry anaerobic digestion reactor of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the partition plate of the present invention;

[0029] Figure 4 It is a structural schematic diagram of an aerobic composting reactor of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the pull-out drive assembly of the present invention.

[0031] Explanation of reference numerals: 1. garbage crushing device; 2. material tank; 3. dry anaerobic digestion reactor; 301. digestion reactor shell; 301-1. medium inlet; 301-2. medium outlet; 302. reactor head; 302-1. pH probe; 302-2. first temperature probe; 303. first feed inlet; 304. first discharge outlet; 305. spiral mixing and propulsion agitator; 306. partition plate; 306-1. liquid flow hole; 307. anode plate; 308. cathode plate; 309. biogas outlet; 4. solid-liquid separator; 5. aerobic composting reactor; 501. composting reactor Reactor housing; 502, second feed inlet; 503, air outlet; 504, second discharge outlet; 505, air inlet; 506, support plate; 507, air vent; 508, material scraper; 509, material distributor; 510, first drive motor; 511, baffle; 512, second temperature probe; 513, pull-out drive assembly; 513-1, rack; 513-2, gear; 513-3, second drive motor; 6, odor treatment device; 7, biogas storage tank; 8, material pump; 9, heat exchanger; 10, conveying pipeline; 11, deodorization pipeline; 12, biogas pipeline; 13, biogas slurry return pipeline. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1As shown, this embodiment discloses an in-situ closed-loop treatment system for perishable garbage with both production capacity and high value-added products, including a garbage crushing device 1, a material tank 2, a dry anaerobic digestion reactor 3, a solid-liquid separator 4, an aerobic composting reactor 5 and an odor treatment device 6 arranged in sequence according to the garbage treatment order. The dry anaerobic digestion reactor 3 is connected to the solid-liquid separator 4 through a conveying pipeline 10, and a material pump 8 is provided on the conveying pipeline 10. The solid-liquid separator 4 and the odor treatment device 6 are connected to the odor treatment device 6 through a deodorizing gas pipeline 11.

[0034] The garbage crushing device 1 crushes the perishable garbage into granular garbage materials, and transports the granular garbage materials to the material tank 2 for temporary storage through the conveying device. The dry anaerobic digestion reactor 3 stirs and performs anaerobic digestion reaction on the granular garbage materials stored in the material tank 2 to produce sludge, sludge and biogas. The sludge and sludge are transported to the solid-liquid separator 4 through the conveying pipeline 10 by the material pump 8 for separation. The separated sludge is processed into organic fertilizer through the aerobic composting reactor 5. The odor generated during the working process of the aerobic composting reactor 5 and the solid-liquid separator 4 is transported to the odor treatment device 6 for purification through the deodorization pipeline 11. The odor treatment device 6 includes a lower deodorization device and a negative pressure fan at the top.

[0035] In order to store the biogas in the dry anaerobic digestion reactor 3, the dry anaerobic digestion reactor 3 is connected to the biogas storage tank 7 through a biogas pipeline 12, and the biogas generated by the dry anaerobic digestion reactor 3 is transported to the biogas storage tank 7 through the biogas pipeline 12 for storage.

[0036] In order to improve the fermentation effect of the dry anaerobic digestion reactor 3, the solid-liquid separator 4 is connected to the material tank 2 through the biogas slurry return pipe 13, and the biogas slurry after separation is returned to the material tank 2 through the biogas slurry return pipe 13 for biogas slurry reuse. The returned biogas slurry enters the dry anaerobic digestion reactor 3 along with the crushed garbage particles for fermentation.

[0037] It should be noted that the daily garbage collection is intermittent, while the operation of the dry anaerobic digestion reactor 3 is continuous. The function of the material tank 2 is to temporarily store the collected materials after crushing them once, and then slowly feed them in batches to prevent the instability of the anaerobic digestion process caused by a large amount of one-time feeding. The installation of the garbage crushing device 1, the material tank 2 and the dry anaerobic digestion reactor 3 belongs to the upper, middle and lower pattern. Specifically, the discharge port of the garbage crushing device 1 is connected to the feed port of the material tank 2, and the discharge port of the material tank 2 is connected to the feed port of the dry anaerobic digestion reactor 3. A control valve is provided at the connection between the inlet and the outlet. The opening of the valve is controlled to feed the materials by gravity, without the need for external machinery. If it is considered that the viscosity of the kitchen waste after crushing is relatively large and it is afraid of clogging the pipeline, a spiral stirring can be set to prevent the stratification of the materials in the storage tank.

[0038] The solid-liquid separation operation is intermittent, and the natural sedimentation method is considered to separate the slurry into solid and liquid. Each sedimentation is 12 to 24 hours, which is adjusted according to the amount of anaerobic output of sludge. The solid-liquid separator 4 and the aerobic composting reactor 5 adopt an upper and lower structure layout, and the outlet of the solid-liquid separator 4 is connected to the inlet of the aerobic composting reactor 5 through a valve.

[0039] like Figure 2 As shown, the dry anaerobic digestion reactor 3 includes a digestion reactor shell 301 and a reactor head 302 sealed and connected to both ends of the digestion reactor shell 301. A first feed port 303 is provided at the upper left end of the digestion reactor shell 301, and a biogas outlet 309 is provided at the upper right end of the digestion reactor shell 301. The biogas outlet 309 is connected to the biogas pipeline 12. A first discharge port 304 is provided at the lower right end of the digestion reactor shell 301. A spiral mixing and propulsion agitator 305, a partition plate 306, and a plurality of groups of anode plates 307 and cathode plates 308 arranged oppositely are provided in the digestion reactor shell 301.

[0040] The anode plate 307 and the cathode plate 308 generate a micro-electric field in the digestion reactor shell 301. By adjusting the voltage or current intensity of the anode and cathode, on the one hand, the micro-electric field generated in the reactor can be enhanced to stimulate the activity of microorganisms, accelerate the conversion of difficult-to-degrade substances in perishable garbage, and improve the methane production efficiency; on the other hand, the organic matter is directly oxidized under the electrolytic action of the anode plate 307 and the cathode plate 308, and the oxidizing products generated by the electrolysis of NaCl also contribute to the decomposition of the organic matter.

[0041] In the digestion reactor shell 301, adding exogenous electron mediators, such as biochar, activated carbon, etc., helps to transfer electrons in the system and promote anaerobic digestion. A pH probe 302-1 and a first temperature probe 302-2 are provided on both reactor heads 302. Both probes are electrically connected to the PLC controller to monitor the parameters of the reaction process in the digestion reactor shell 301 in real time.

[0042] The rotating shaft of the spiral mixing propeller agitator 305 is rotatably connected to the reactor heads 302 on both sides, and the spiral mixing propeller agitator 305 can be driven by a motor. The spiral mixing propeller agitator 305 rotates inside the digestion reactor shell 301, regularly stirs and mixes the materials, accelerates the mass transfer and reaction rate of the anaerobic digestion process, and pushes the materials to the first discharge port 304 during the stirring process.

[0043] The partition plate 306 is located in the middle of the digestion reactor shell 301, and the partition plate 306 is welded and fixed to the side wall of the lower half of the digestion reactor shell 301. The partition plate 306 prevents the material from entering the digestion reactor shell 301 from the first feed inlet 303 and then directly entering the discharge side. The partition plate 306 forms a certain barrier to the mixed material, which is conducive to the spiral mixing propeller 305 to fully mix the material during the mixing process. Figure 3 As shown, in order to facilitate the circulation of biogas slurry inside the digestion reactor shell 301, a plurality of liquid circulation holes 306-1 are provided on the partition plate 306.

[0044] In order to ensure the digestion reaction temperature, the digestion reactor shell 301 adopts a double-layer jacket structure, and a medium inlet 301-1 and a medium outlet 301-2 for heat exchange medium to flow in and out of the double-layer jacket structure are arranged on the outer wall of the digestion reactor shell 301. Hot water can be used as the heat exchange medium.

[0045] like Figure 4 As shown, the aerobic composting reactor 5 includes a composting reactor shell 501, and a second feed port 502 and an air outlet 503 are arranged at the top of the composting reactor shell 501, and the air outlet 503 is connected to the odor treatment device 6 through an air duct; a second discharge port 504 and an air inlet 505 are arranged at the bottom of the composting reactor shell 501. In this embodiment, the air inlet 505 is connected to the outlet of the heat exchanger 9 through the air duct, and the inlet of the heat exchanger 9 is connected to the material tank 2 through the air duct. The gas heated by the heat exchanger 9 flows to the inside of the aerobic composting reactor 5, providing heat for the composting process and ensuring the required temperature in the composting process.

[0046] A plurality of trays 506 that can be pulled outward are arranged from top to bottom inside the composting reactor shell 501. In this embodiment, both sides of each tray 506 are connected to the inner wall of the composting reactor shell 501 by slide rails. A plurality of air holes 507 are arranged on each tray 506, and a material scraper 508 and a second temperature probe 512 are arranged above each tray 506. The gas heated by the heat exchanger 9 gradually flows upward through the air holes 507 on each tray 506. During the circulation process, the high-temperature gas heats the biogas residue on each tray 506 to promote the improvement of microbial activity during the composting process, and heat-dries the compost product at the same time.

[0047] By pulling the support plate 506 outward, the biogas residue on the support plate 506 naturally falls onto the support plate 506 below under the action of the material scraper 508. By repeating the above operation, the biogas residue can be dried continuously. The processed biogas residue finally forms organic fertilizer and is discharged from the second discharge port 504. The second temperature probe 512 is electrically connected to the PLC controller to monitor the compost temperature of each layer of the support plate 506.

[0048] A plurality of pull-out drive components 513 for driving the support plates 506 to be pulled out are arranged on the outer wall of the composting reactor housing 501, and each pull-out drive component 513 corresponds to each support plate 506. Figure 5 As shown, the pulling drive assembly 513 includes two racks 513-1 installed side by side on the bottom surface of the support plate 506, the racks 513-1 are meshed with the gears 513-2 below, and the gears 513-2 are connected to the second drive motor 513-3 installed on the outer wall of the composting reactor housing 501. The second drive motor 513-3 is controlled by PLC to drive the gears 513-2 to rotate, so as to bring out and reset the support plate 506.

[0049] A material distributor 509 is provided above the support plate 506 at the top. The material distributor 509 is connected to a first drive motor 510 installed on the top of the composting reactor housing 501. The material distributor 509 rotates under the action of the first drive motor 510 to evenly spread the material on the support plate 506.

[0050] In the process of composting, in order to prevent high-temperature gas from leaking out of the discharge port, a baffle 511 is hinged on the second feed port 502 and the second discharge port 504, and a torsion spring for driving the baffle 511 to reset is arranged on the hinge shaft of the baffle 511. When the material enters from the second feed port 502 or is discharged from the second discharge port 504, when the material accumulates to a certain amount, the baffle 511 automatically opens under the action of the gravity of the accumulated material.

[0051] In this embodiment, the garbage crushing device 1, the material tank 2, the dry anaerobic digestion reactor 3, the solid-liquid separator 4, the aerobic composting reactor 5 and the odor treatment device 6 are all controlled by the PLC. Specifically, the PLC is electrically connected to the switch that controls the operation of the garbage crushing device 1. The PLC is connected to the valve at the outlet of the material tank 2, and feeds the dry anaerobic digestion reactor 3 by controlling the opening and closing time of the valve. The PLC is connected to the pH probe, temperature probe, biogas composition analysis probe, flow probe and stirring device control switch of the dry anaerobic digestion reactor 3 to detect parameters in the anaerobic digestion process and control the stirring frequency. At the same time, the PLC is also connected to the reactor discharge valve and the material pump, and the two work simultaneously to realize the discharge of the anaerobic digestion reactor. The PLC is connected to the discharge valve of the solid-liquid separator 4, mainly to control the time of feeding the aerobic composting reactor 5. The PLC is connected to the motor for moving the support plates 506 of each layer of the aerobic composting reactor 5, and then controls the movement time of each layer of the support plates to realize the loading and unloading of the composting materials. At the same time, it is also connected to the second temperature probe 512 to detect the compost temperature. The PLC is also connected to the negative pressure variable frequency fan of the odor treatment device 6 to control the air flow.

[0052] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An in-situ closed-loop treatment system for perishable waste with both production capacity and high value-added products, characterized by: The invention comprises a garbage crushing device (1), a material tank (2), a dry anaerobic digestion reactor (3), a solid-liquid separator (4), an aerobic composting reactor (5) and an odor treatment device (6) which are arranged in sequence according to the garbage treatment order; the dry anaerobic digestion reactor (3) is connected to the solid-liquid separator (4) through a conveying pipeline (10), a material pump (8) is arranged on the conveying pipeline (10), and the solid-liquid separator (4) and the aerobic composting reactor (5) are both connected to the odor treatment device (6) through a deodorizing gas pipeline (11); The garbage crushing device (1) crushes perishable garbage into granular garbage materials, and conveys the granular garbage materials to the material tank (2) for temporary storage through the conveying device. The dry anaerobic digestion reactor (3) stirs the granular garbage materials stored in the material tank (2) and performs anaerobic digestion reaction to produce biogas, biogas residue and biogas. The biogas slurry and biogas residue are conveyed to the solid-liquid separator (4) through the conveying pipeline (10) by the material pump (8) for separation. The biogas residue after separation is processed into organic fertilizer through the aerobic composting reactor (5). The odor generated during the operation of the aerobic composting reactor (5) and the solid-liquid separator (4) is conveyed to the odor treatment device (6) through the deodorizing gas pipeline (11) for purification. The odor treatment device (6) comprises a lower deodorizing device and a negative pressure fan at the top. The aerobic composting reactor (5) comprises a composting reactor shell (501), the top of the composting reactor shell (501) is provided with a second feed inlet (502) and an air outlet (503), and the air outlet (503) is connected to the odor treatment device (6) through an air duct; the bottom of the composting reactor shell (501) is provided with a second discharge port (504) and an air inlet (505); A plurality of support plates (506) which can be pulled outward are arranged at intervals from top to bottom inside the composting reactor shell (501), each support plate (506) is provided with a plurality of air holes (507), and a material scraper (508) and a second temperature probe (512) are provided above each support plate (506); A material distributor (509) is provided above the support plate (506) at the top, and the material distributor (509) is connected to a first driving motor (510) installed on the top of the composting reactor housing (501) in a power connection; The air inlet (505) is connected to the outlet of the heat exchanger (9) through an air duct, and the inlet of the heat exchanger (9) is connected to the material tank (2) through an air duct; By pulling the support plate (506) outward, the biogas residue on the support plate (506) naturally falls onto the support plate (506) below under the action of the material scraper (508), and by repeating the operation, uninterrupted drying of the biogas residue can be achieved; The solid-liquid separator (4) is connected to the material tank (2) via a biogas slurry return pipe (13), and the biogas slurry after separation flows back to the material tank (2) via the biogas slurry return pipe (13) for biogas slurry reuse.

2. The in-situ closed-loop treatment system for perishable waste with both productivity and high value-added products according to claim 1 is characterized by: The dry anaerobic digestion reactor (3) is connected to a biogas storage tank (7) via a biogas pipeline (12), and the biogas generated by the dry anaerobic digestion reactor (3) is transported to the biogas storage tank (7) via the biogas pipeline (12) for storage.

3. The in-situ closed-loop treatment system for perishable waste with both productivity and high value-added products according to claim 2 is characterized by: The dry anaerobic digestion reactor (3) comprises a digestion reactor shell (301) and a reactor head (302) sealedly connected to both ends of the digestion reactor shell (301); a first feed inlet (303) is arranged at the upper left end of the digestion reactor shell (301); a biogas outlet (309) is arranged at the upper right end of the digestion reactor shell (301); the biogas outlet (309) is communicated with the biogas pipeline (12); a first discharge port (304) is arranged at the lower right end of the digestion reactor shell (301); a spiral mixing and propulsion agitator (305), a partition plate (306) and a plurality of groups of anode plates (307) and cathode plates (308) arranged opposite to each other are arranged in the digestion reactor shell (301); The rotating shaft of the spiral mixing propeller agitator (305) is rotatably connected to the reactor heads (302) on both sides; the partition plate (306) is located in the middle of the digestion reactor shell (301), and the partition plate (306) is fixedly connected to the side wall of the lower half of the digestion reactor shell (301).

4. The in-situ closed-loop treatment system for perishable waste with both productivity and high value-added products according to claim 3 is characterized by: The partition plate (306) is provided with a plurality of liquid circulation holes (306-1).

5. The in-situ closed-loop treatment system for perishable waste with both productivity and high value-added products according to claim 3 is characterized by: The digestion reactor shell (301) adopts a double-layer jacket structure, and the outer wall of the digestion reactor shell (301) is provided with a medium inlet (301-1) and a medium outlet (301-2) for heat exchange medium to flow into and out of the double-layer jacket structure; The two reactor heads (302) are both provided with a pH probe (302-1) and a first temperature probe (302-2).

6. The in-situ closed-loop treatment system for perishable waste with both productivity and high value-added products according to claim 3 is characterized by: An exogenous electron mediator is added into the digestion reactor shell (301).

7. The in-situ closed-loop treatment system for perishable waste with both productivity and high value-added products according to claim 1 is characterized by: The second feed port (502) and the second discharge port (504) are both hingedly connected with a baffle (511), and a torsion spring for driving the baffle (511) to return to its original position is arranged on the hinge shaft of the baffle (511); Both sides of each support plate (506) are connected to the inner wall of the composting reactor shell (501) via slide rails.

8. The in-situ closed-loop treatment system for perishable waste with both productivity and high value-added products according to claim 1 is characterized by: A plurality of pull-out drive components (513) for driving the support plate (506) to be pulled out are arranged on the outer wall of the composting reactor shell (501), and each of the pull-out drive components (513) corresponds to each of the support plates (506) one by one. The pull-out drive components (513) include two racks (513-1) installed side by side on the bottom surface of the support plate (506), and the racks (513-1) are meshed with a gear (513-2) below, and the gear (513-2) is connected to a second drive motor (513-3) installed on the outer wall of the composting reactor shell (501) in power connection.

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