Kitchen waste pretreatment slurry recycling equipment

Abstract

The utility model provides kitchen waste pretreatment slurry recycling equipment which comprises a reaction module, and the reaction module comprises a pH regulating tank, a dosing area, a reaction area, a settling area, a first discharging area and a filtering area which are connected in sequence; the pH adjusting tank is connected with a kitchen waste pretreatment system, the dosing area is provided with a dosing pump and a dosing tank body connected with the dosing pump, the dosing pump is connected with the pH adjusting tank and the reaction area, the dosing area is used for dosing chemicals into the reaction area and reducing the concentration of ammonia nitrogen and total phosphorus in slurry, and the slurry discharged from the filtering area is discharged to a biogas slurry treatment system. The reaction module converts macromolecular nutrient substances into micromolecular nutrient substances through biochemical reaction, so that the micromolecular nutrient substances are easier to absorb and utilize; and removing part of nitrogen and phosphorus through physical and chemical reaction so as to improve the carbon-nitrogen ratio of the slurry. Compared with the prior art, the biogas slurry treatment system disclosed by the utility model is more favorable for improving the carbon nitrogen ratio of a sewage treatment system.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen garbage treatment technical field especially relates to a kind of kitchen garbage pretreatment slurry resource equipment. BACKGROUND

[0002] With the promotion of garbage classification in nationwide in recent years, anaerobic digestion treatment after pretreatment such as kitchen garbage pulping becomes a trend, and a large amount of carbon-containing organic matter in slurry is decomposed and converted into biogas for recycling, while protein and other substances are decomposed into small molecules such as ammonia nitrogen, but the total nitrogen content in slurry is reduced slightly. After anaerobic digestion, the slurry and the residue produced by solid-liquid separation, because carbon escapes in the form of biogas during anaerobic digestion, ammonia nitrogen remains in the slurry, so during the slurry wastewater treatment process, the carbon-nitrogen ratio of the influent is often out of balance; If the entire external carbon source is used, the cost is extremely high, if the high carbon-nitrogen ratio slurry without anaerobic digestion is used as a carbon source and added to the slurry wastewater treatment system, due to the presence of a large amount of refractory substances, it will lead to unstable operation of the biochemical system and sludge aging. SUMMARY

[0003] The utility model solves the technical problem, provide a kind of kitchen garbage pretreatment slurry resource equipment, can for part kitchen garbage pretreatment slurry carries out resource processing, macromolecular refractory substance and protein are degraded into small molecule organic matter, it is favorable to the application of microorganism in wastewater treatment biochemical system;Meanwhile, by adding the reagent for removing nitrogen and phosphorus, the nitrogen and phosphorus content in slurry is reduced, and the carbon-nitrogen ratio of the resource slurry is improved.

[0004] The utility model is realized as follows:

[0005] The utility model provides a kind of kitchen garbage pretreatment slurry resource equipment, the equipment is connected with kitchen garbage pretreatment system, the equipment includes the reaction module for carrying out biochemical reaction and physical and chemical reaction to kitchen garbage pretreatment slurry, the reaction module includes pH adjusting pool, dosing area, reaction zone, sedimentation zone, discharge area one and filter area;

[0006] The pH adjusting pool, reaction zone, sedimentation zone, discharge area one and filter area are sequentially connected, the pH adjusting pool is connected with kitchen garbage pretreatment system, the dosing area is provided with dosing pump and the dosing tank body connected with dosing pump, the dosing pump is connected with pH adjusting pool and reaction zone, the dosing area is used to add reagent to reaction zone, to reduce the ammonia nitrogen and total phosphorus concentration in slurry, the slurry discharged from filter area is discharged to slurry treatment system.

[0007] Further, the reaction zone comprises reaction A zone and reaction B zone for anaerobic biochemical reaction and reaction C zone and reaction D zone for physicochemical reaction, the dosing pump is connected with the reaction C zone and the reaction D zone to put the medicine required for physicochemical reaction into the reaction C zone and the reaction D zone.

[0008] The reaction A zone, the reaction B zone, the reaction C zone and the reaction D zone are connected in sequence, and the reaction A zone is connected with the pH adjusting tank, and the reaction D zone is connected with the discharge area I.

[0009] Further, the precipitation zone is also connected with the reaction A zone and the anaerobic digestion system, and the sludge formed by the precipitation zone is partially returned to the reaction A zone by the sludge pump and is partially discharged to the anaerobic digestion system for deep anaerobic digestion.

[0010] Further, the biogas slurry treatment system comprises a biogas residue slurry adjusting tank, a dewatering system, a sewage pretreatment system, a sewage adjusting tank and a sewage treatment system connected in sequence, and the biogas residue slurry adjusting tank is connected with the anaerobic digestion system.

[0011] Further, the filtration zone is connected with the biogas residue slurry adjusting tank.

[0012] Further, it further comprises a separation module for solid-liquid separation of the slurry discharged from the filtration zone and an oil removal module for oil removal of the slurry, the separation module is connected with the oil removal module, and the separation module or the oil removal module is connected with the sewage adjusting tank.

[0013] Further, the separation module comprises a solid-liquid separation device area in which a solid-liquid separation device is arranged and a discharge area III in which a third water outlet pump is arranged, the discharge area III is connected with the solid-liquid separation device area, and the solid-liquid separation device area is used for solid-liquid separation of the slurry discharged from the filtration zone.

[0014] The oil removal module comprises an oil removal device area in which an oil removal device is arranged and a discharge area II in which a second water outlet pump is arranged, and the discharge area II is connected with the oil removal device area.

[0015] Further, the solid-liquid separation device is one of an ultrafiltration membrane, a stacked screw dewatering machine, a horizontal centrifugal dewatering machine or a vertical centrifugal dewatering machine.

[0016] Further, if the solid-liquid separation device is an ultrafiltration membrane, the oil removal device area is connected with the filtration zone, the discharge area II is connected with the solid-liquid separation device area, and the discharge area III is connected with the sewage adjusting tank.

[0017] If the solid-liquid separation device is a stacked screw dewatering machine, a horizontal centrifugal dewatering machine or a vertical centrifugal dewatering machine, the solid-liquid separation device area is connected with the filtration zone, the discharge area III is connected with the oil removal device area, and the discharge area II is connected with the sewage adjusting tank.

[0018] Further, the solid-liquid separation equipment area is also connected with the reaction module and the anaerobic digestion system, so as to transport the backflow liquid or biogas residue generated by the solid-liquid separation equipment to the reaction module and the anaerobic digestion system for deep anaerobic digestion.

[0019] The kitchen garbage pretreatment slurry resourceization equipment has the advantages that the reaction module, the oil removal module and the separation module are arranged in one set of equipment, and different module combinations can be selected according to the pretreatment mode, the solid-liquid separation equipment selection and the actual situation on site. The installation and construction are convenient, the land occupation is small, and the cost is low.

[0020] The reaction module converts macromolecular nutrients into small molecular nutrients through biochemical reaction, so that the nutrients are more easily absorbed and utilized; and part of nitrogen and phosphorus is removed through physicochemical reaction, so as to improve the carbon-nitrogen ratio of the slurry. The slurry after the physicochemical reaction and the solid-liquid separation is transported back to the biogas liquid treatment system, and compared with the prior art, the kitchen garbage pretreatment slurry resourceization equipment is more conducive to improving the carbon-nitrogen ratio of the sewage treatment system.

[0021] Meanwhile, the oil removal module and the separation module are flexibly arranged, and the oil and the suspended matter in the slurry are removed according to the needs. The kitchen garbage pretreatment slurry resourceization equipment is beneficial to the absorption and utilization of the resourceized slurry by the sewage treatment system, is helpful to improving the sludge activity, the nitrogen removal and the carbon source degradation treatment efficiency in the sewage treatment system, and effectively reduces the operation cost of the sewage treatment system. BRIEF DESCRIPTION OF DRAWINGS

[0022] The kitchen garbage pretreatment slurry resourceization equipment will be further described below with reference to the drawings and embodiments.

[0023] Figure 1 FIG. 1 is a structural schematic view of a kitchen garbage pretreatment slurry resourceization equipment according to an embodiment of the present application.

[0024] Figure 2 FIG. 2 is a structural schematic view of a kitchen garbage pretreatment slurry resourceization equipment according to another embodiment of the present application. Figure 1

[0025] Figure 3 FIG. 3 is a structural schematic view of a kitchen garbage pretreatment slurry resourceization equipment according to still another embodiment of the present application.

[0026] Figure 4 FIG. 4 is a structural schematic view of a kitchen garbage pretreatment slurry resourceization equipment according to still another embodiment of the present application.

[0027] FIG. 1 is a structural schematic view of a kitchen garbage pretreatment slurry resourceization equipment according to an embodiment of the present application.

[0028] 1, reaction module; 11, pH adjusting tank; 12, dosing area; 13, reaction A area; 14, reaction B area; 15, reaction C area; 16, reaction D area; 17, sedimentation area; 18, first discharge area; 19, filtration area; 2, oil removal module; 21, oil removal equipment area; 22, second discharge area; 3, separation module; 31, solid-liquid separation equipment area; 32, third discharge area. DETAILED DESCRIPTION​

[0029] Example 1, please refer to Figures 1 to 2 This utility model provides a resource utilization device for pre-treated kitchen waste slurry. The device is connected to a kitchen waste pre-treatment system. The device includes a reaction module 1 for performing biochemical and physicochemical reactions on the pre-treated kitchen waste slurry. The reaction module 1 includes a pH adjustment tank 11, a dosing zone 12, a reaction zone, a sedimentation zone 17, a discharge zone 18, and a filtration zone 19.

[0030] The pH adjustment tank 11, reaction zone, sedimentation zone 17, discharge zone 18, and filtration zone 19 are connected in sequence. The filtration zone 19 is equipped with filtration equipment and a first water pump. The discharge zone 18 is connected to the first water pump through a pipeline. The outlet of the first water pump is connected to the filtration equipment. The pH adjustment tank 11 is connected to the kitchen waste pretreatment system. The dosing zone 12 is equipped with a dosing pump and a dosing tank connected to the dosing pump. The dosing pump is controlled by a PID control system. The PID control system is used to add the reagents required for the physicochemical reaction to the pH adjustment tank 11, reaction zone C 15, and reaction zone D 16 and to accurately measure them. The dosing pump is connected to the pH adjustment tank 11 and the reaction zone. The dosing zone 12 is used to add reagents to the reaction zone to reduce the concentration of ammonia nitrogen and total phosphorus in the slurry. The slurry discharged from the filtration zone 19 is discharged to the biogas slurry treatment system.

[0031] Specifically, the reaction zone includes reaction zone A 13 and reaction zone B 14 for anaerobic biochemical reactions, and reaction zone C 15 and reaction zone D 16 for physicochemical reactions. The dosing pump is connected to reaction zone C 15 and reaction zone D 16 to deliver the drugs required for the physicochemical reactions to reaction zone C 15 and reaction zone D 16.

[0032] The reaction zone A 13, reaction zone B 14, reaction zone C 15 and reaction zone D 16 are connected in sequence, and the reaction zone A 13 is connected to the pH adjustment tank 11, and the reaction zone D 16 is connected to the discharge zone 18.

[0033] Reaction zones A (13) and B (14) are used for anaerobic biochemical reactions to decompose large organic molecules and proteins in the slurry into smaller organic molecules. The dosing zone (12) adds the necessary chemicals for the physicochemical reactions to reaction zones C (15) and D (16) to reduce the concentrations of ammonia nitrogen and total phosphorus in the slurry. The inlet of filtration zone 19 is connected to discharge zone 18, and it is used to remove large particles and fibrous materials from the slurry after the anaerobic biochemical and physicochemical reactions.

[0034] In this embodiment, paddle mixers are installed on the top of the pH adjustment tank 11, reaction zone C 15, and reaction zone D 16 to promote the reaction between the added reagents and the slurry. Top-mounted vertical shaft stirring systems are installed in reaction zone A 13 and reaction zone B 14 to ensure the consistency of the anaerobic microbial living environment, such as the reaction pH and material environment, within the system.

[0035] The pH adjustment tank 11, dosing zone 12, reaction zone A 13, reaction zone B 14, reaction zone C 15, reaction zone D 16, sedimentation zone 17, and discharge zone 18 are composed of independent tanks, combined tanks, carbon steel anti-corrosion water tanks, stainless steel water tanks, or reinforced concrete water tanks.

[0036] Specifically, the sedimentation zone 17 is also connected to the reaction zone A 13 and the anaerobic digestion system. The sediment formed in the sedimentation zone 17 is partially returned to the reaction zone A 13 by a sludge pump, and the other part is discharged to the anaerobic digestion system for deep anaerobic digestion.

[0037] Specifically, the biogas slurry treatment system includes a biogas residue equalization tank, a dewatering system, a sewage pretreatment system, a sewage equalization tank, and a sewage treatment system connected in sequence, and the biogas residue equalization tank is connected to the anaerobic digestion system.

[0038] In this embodiment, a portion of the slurry discharged from the kitchen waste pretreatment system flows to the anaerobic digestion system, where a large amount of carbonaceous organic matter in the slurry is decomposed and converted into biogas for recycling. The other portion of the discharged slurry enters the pH adjustment tank 11, where acid, alkali, or buffer agents are added via a dosing pump in the dosing zone 12 to balance the pH value. After uniform mixing by a stirrer, the effluent enters reaction zone A 13 through pipes or openings in the tank wall. An anaerobic biochemical reaction takes place inside reaction zone A 13, which is equipped with a top-mounted vertical shaft mixer to ensure a uniform reaction environment. This biochemical reaction decomposes large organic molecules and proteins in the slurry into smaller organic molecules. The effluent from reaction zone A 13 enters reaction zone B 14 through pipes or openings in the tank wall for a second stage of anaerobic biochemical reaction. Reaction zone B 14 is also equipped with a top-mounted vertical shaft mixer to ensure a uniform reaction environment. Further biochemical reactions decompose the organic matter and proteins in the effluent from reaction zone A 13 into even smaller organic molecules. The effluent from reaction zone B 14 enters reaction zone C 15 through pipes or openings in the tank wall, and further enters reaction zone D 16 through pipes or openings in the tank wall. In reaction zones C 15 and D 16, chemicals are added through the dosing pump in dosing zone 12 to remove nutrients such as nitrogen and phosphorus from the slurry. The effluent from reaction zone D 16 enters sedimentation zone 17 through pipes or openings in the tank wall to settle the formed sediment. The effluent from sedimentation zone 17 enters discharge zone 18 through pipes or openings in the tank wall after the overflow weir. The sediment formed in sedimentation zone 17 is partially pumped back to reaction zone A 13 by sludge pumps, and partially discharged to the anaerobic digestion system for deep anaerobic digestion. The effluent from discharge zone 18 is connected to the water pump inlet in filtration zone 19 through pipes. The water pump outlet in filtration zone 19 is connected to the filtration equipment to remove large particles and fibrous materials from the slurry after anaerobic biochemical and physicochemical reactions, reducing the impact on the operation of downstream equipment. Reaction module 1 converts macromolecular nutrients into small-molecule nutrients through biochemical reactions, making them easier to absorb and utilize; then, it removes some nitrogen and phosphorus through physicochemical reactions to increase the carbon-nitrogen ratio of the slurry. The slurry that has undergone physicochemical reactions is then transported back to the biogas slurry treatment system. Compared with existing technologies, this invention is more effective in improving the carbon-nitrogen ratio of the wastewater treatment system.

[0039] Example 2, please refer to Figures 1 to 3 The structure of this embodiment is basically the same as that of Embodiment 1. Based on Embodiment 1, under the conditions of limited on-site space and low oil content in the original slurry, the outlet of the filtration zone 19 of the reaction module 1 is connected to the biogas residue liquid conditioning tank, and then solid-liquid separation is carried out through the biogas residue and biogas slurry dewatering system at the front end of the sewage treatment.

[0040] Example 3, please refer to Figures 1 to 4The structure of this embodiment is basically the same as that of Embodiment 1. Based on Embodiment 1, when the site space is sufficiently spacious or the original slurry contains a large amount of oil, and when the kitchen waste pretreatment system at the front end of the pH adjustment tank 11 does not contain an oil removal unit, the kitchen waste pretreatment slurry resource utilization equipment further includes a separation module 3 for solid-liquid separation of the slurry discharged from the filtration zone 19 and an oil removal module 2 for removing oil from the slurry. The dosing pump can also be used to add drugs to the oil removal module 2. The separation module 3 is connected to the oil removal module 2, and the separation module 3 or the oil removal module 2 is connected to the biogas slurry treatment system.

[0041] Of course, if the kitchen waste pretreatment system at the front end of the pH adjustment tank 11 contains an oil removal unit, then the oil removal module 2 is not configured. In this case, one end of the separation module 3 is connected to the filtration zone 19, and the other end is connected to the biogas slurry treatment system.

[0042] Depending on the oil content requirements of the separation module 3 for the influent, the oil removal module 2 can be installed at the front or rear of the separation module 3. When the oil removal module 2 is installed at the front of the separation module 3, it is connected to the filtration zone 19, and the separation module 3 is connected to the wastewater equalization tank. When the oil removal module 2 is installed at the rear of the separation module 3, it is connected to the filtration zone 19, and the oil removal module 2 is connected to the wastewater equalization tank.

[0043] Specifically, the separation module 3 includes a solid-liquid separation equipment area 31 with a solid-liquid separation device and a discharge area 32 with a third water pump. The discharge area 32 is connected to the solid-liquid separation equipment area 31. The solid-liquid separation equipment area 31 is used to perform solid-liquid separation on the slurry discharged from the filtration area 19.

[0044] The oil removal module 2 includes an oil removal equipment area 21 with an internal oil removal device and a discharge area 22 equipped with a second water pump. The discharge area 22 is connected to the oil removal equipment area 21. The oil removal equipment uses a three-phase oil removal device, and the separated grease is transported off-site.

[0045] After oil removal by the equipment in the oil removal equipment area 21, the oil content in the slurry is reduced, which reduces the impact of oil on the ultrafiltration membrane in the downstream solid-liquid separation equipment area 31. At the same time, it also reduces the impact of the resource-based slurry added to the wastewater treatment system on the membrane equipment in the wastewater treatment system.

[0046] Specifically, the solid-liquid separation equipment is one of the following: ultrafiltration membrane, screw press dewatering machine, horizontal centrifugal dewatering machine, or vertical centrifugal dewatering machine.

[0047] Specifically, if the solid-liquid separation equipment is an ultrafiltration membrane, the inlet end of the oil removal equipment zone 21 is connected to the filtration zone 19, the discharge zone 22 is connected to the inlet end of the solid-liquid separation equipment zone 31, and the discharge zone 32 is connected to the wastewater equalization tank. The ultrafiltration membrane has certain requirements for the feed oil, therefore, the oil removal module 2 is set at the front end of the separation module 3.

[0048] If the solid-liquid separation equipment is a screw press dewatering machine, a horizontal centrifugal dewatering machine, or a vertical centrifugal dewatering machine, then the water inlet of the solid-liquid separation equipment zone 31 is connected to the filtration zone 19, the discharge zone 32 is connected to the water inlet of the oil removal equipment zone 21, and the discharge zone 22 is connected to the wastewater equalization tank. Screw press dewatering machines, horizontal centrifugal dewatering machines, or vertical centrifugal dewatering machines do not have requirements regarding the type of oil fed; therefore, the oil removal module 2 is located at the rear end of the separation module 3.

[0049] The solid-liquid separation equipment prioritizes ultrafiltration membranes. Through the action of ultrafiltration membranes, suspended solids and some large organic molecules can be trapped on one side of the membrane, reducing the impact of suspended solids on the wastewater treatment system. The effluent from the equipment in the solid-liquid separation equipment zone 31 enters the discharge zone 32, and is then pumped to the wastewater equalization tank by the third effluent pump in the discharge zone 32.

[0050] When the solid-liquid separation device is an ultrafiltration membrane, part of the reflux liquid generated by the ultrafiltration membrane is returned to the reaction module 1, and part is discharged to the anaerobic digestion system for deep anaerobic digestion.

[0051] When the solid-liquid separation equipment is a screw press dewatering machine, a horizontal centrifugal dewatering machine, or a vertical centrifugal dewatering machine, the biogas residue with a moisture content of 80%-85% produced by the screw press dewatering machine, the horizontal centrifugal dewatering machine, or the vertical centrifugal dewatering machine is partially returned to the reaction module 1 and partially discharged to the anaerobic digestion system for deep anaerobic digestion through a screw pump.

[0052] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A kitchen garbage pretreatment slurry resource utilization equipment, characterized in that: The device is connected with the kitchen garbage pretreatment system, and the device comprises a reaction module for biochemical reaction and physicochemical reaction of the kitchen garbage pretreatment slurry. The pH adjusting tank, the reaction zone, the precipitation zone, the first discharge zone and the filter zone are sequentially connected, the pH adjusting tank is connected with the kitchen garbage pretreatment system, the dosing area is provided with a dosing pump and a dosing tank connected with the dosing pump, the dosing pump is connected with the pH adjusting tank and the reaction zone, the dosing area is used for adding reagents to the reaction zone to reduce the concentration of ammonia nitrogen and total phosphorus in the slurry, and the slurry discharged from the filter zone is discharged to the biogas slurry treatment system.

2. The kitchen garbage pretreatment slurry resource utilization equipment according to claim 1, characterized in that: The reaction zone comprises reaction A zone and reaction B zone for anaerobic biochemical reaction and reaction C zone and reaction D zone for physicochemical reaction, and the dosing pump is connected with the reaction C zone and the reaction D zone to add reagents required for physicochemical reaction to the reaction C zone and the reaction D zone. The reaction A zone, the reaction B zone, the reaction C zone and the reaction D zone are sequentially connected, and the reaction A zone is connected with the pH adjusting tank, and the reaction D zone is connected with the first discharge zone.

3. The kitchen garbage pretreatment slurry resource utilization equipment according to claim 2, characterized in that: The precipitation zone is also connected with the reaction A zone and the anaerobic digestion system, and the precipitate formed by the precipitation zone is partially returned to the reaction A zone by a sludge pump and partially discharged to the anaerobic digestion system for deep anaerobic digestion.

4. The kitchen garbage pretreatment slurry resource utilization equipment according to claim 1, characterized in that: The biogas slurry treatment system comprises a biogas residue liquid adjusting tank, a dewatering system, a sewage pretreatment system, a sewage adjusting tank and a sewage treatment system which are sequentially connected, and the biogas residue liquid adjusting tank is connected with the anaerobic digestion system.

5. The kitchen garbage pretreatment slurry resource utilization equipment according to claim 4, characterized in that: The filter zone is connected with the biogas residue liquid adjusting tank.

6. The kitchen garbage pretreatment slurry resource utilization equipment according to claim 4, characterized in that: Further comprising a separation module for solid-liquid separation of the slurry discharged from the filter zone and an oil removal module for oil removal of the slurry, the separation module is connected with the oil removal module, and the separation module or the oil removal module is connected with the sewage adjusting tank.

7. The kitchen garbage pretreatment slurry resource utilization equipment according to claim 6, characterized in that: The separation module comprises a solid-liquid separation equipment area in which a solid-liquid separation equipment is arranged and a third discharge area provided with a third water pump, the third discharge area is connected with the solid-liquid separation equipment area, and the solid-liquid separation equipment area is used for solid-liquid separation of the slurry discharged from the filter zone. The oil removal module comprises an oil removal equipment area in which an oil removal equipment is arranged and a second discharge area provided with a second water pump, and the second discharge area is connected with the oil removal equipment area.

8. The kitchen garbage pretreatment slurry resource utilization equipment according to claim 7, characterized in that: The solid-liquid separation equipment is one of an ultrafiltration membrane, a stacked screw dewatering machine, a horizontal centrifugal dewatering machine and a vertical centrifugal dewatering machine.

9. The kitchen garbage pretreatment slurry resource utilization equipment according to claim 8, characterized in that: If the solid-liquid separation equipment is an ultrafiltration membrane, the oil removal equipment area is connected with the filter zone, the second discharge area is connected with the solid-liquid separation equipment area, and the third discharge area is connected with the sewage adjusting tank. If the solid-liquid separation equipment is a stacked screw dewatering machine, a horizontal centrifugal dewatering machine or a vertical centrifugal dewatering machine, the solid-liquid separation equipment area is connected with the filter zone, the third discharge area is connected with the oil removal equipment area, and the second discharge area is connected with the sewage adjusting tank.

10. A kitchen waste pre-treatment slurry resource utilization apparatus according to any one of claims 7, 8 or 9, characterized in that: The solid-liquid separation equipment area is also connected with the reaction module and the anaerobic digestion system to convey the backflow liquid or biogas residue generated by the solid-liquid separation equipment to the reaction module and the anaerobic digestion system for deep anaerobic digestion.

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