A vertical flow labyrinth treatment mechanism rear end sludge reduction device

Abstract

The utility model relates to sewage treatment technical field, concretely relates to a vertical flow maze processing mechanism back end sludge reduction device, the first sludge discharge part is equipped between sludge reduction mechanism and vertical flow maze processing mechanism, sludge reduction mechanism includes built -in speed separation biochemical ball first reduction pool and second reduction pool, first reduction pool and second reduction pool are communicated through the sludge hole, the second sludge discharge part, third sludge discharge part are equipped between first reduction pool and second reduction pool, and third sludge discharge part is communicated with vertical flow maze processing mechanism, the utility model discloses can reduce residual sludge amount through sludge reduction device, reduces sludge treatment cost, improves processing efficiency, and sludge reduction device mainly is through microorganism endogenous respiration to consume self organic matter to complete sludge reduction, can convert the unstable organic matter of perishable sludge into stable material, reduces the content of pathogenic bacteria and pollutant in sludge, thereby reduces the pollution problem in the follow -up drying, burning link.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a sludge reduction device at the rear end of a vertical flow labyrinth treatment mechanism. Background Technology

[0002] With my country's rapid economic development and people's increasing demands for a better environment, rural domestic sewage treatment is characterized by geographically dispersed locations and relatively small treatment volumes, making the centralized disposal of excess sludge generated from sewage treatment quite difficult.

[0003] Moreover, when disposing of residual sludge from wastewater treatment, the process of using sludge desludge equipment to directly treat and transport the sludge is costly. More importantly, subsequent treatment of the sludge, such as drying and incineration, may cause new environmental pollution problems. Utility Model Content

[0004] The purpose of this invention is to solve the technical problems of frequent and costly treatment of existing residual sludge, and the potential for new environmental pollution in subsequent drying and incineration processes. The invention provides a sludge reduction device at the back end of a vertical flow labyrinth treatment mechanism.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A sludge reduction device at the rear end of a vertical flow labyrinth treatment mechanism includes a sludge reduction mechanism installed at the rear end of the vertical flow labyrinth treatment mechanism.

[0007] A first sludge discharge component is provided between the sludge reduction mechanism and the vertical flow labyrinth treatment mechanism.

[0008] The sludge reduction mechanism includes a first reduction tank and a second reduction tank.

[0009] Both the first and second reduction tanks are equipped with rapid-decomposition biochemical balls;

[0010] The first reduction tank and the second reduction tank are connected by a mud passage hole;

[0011] A second sludge discharge device is provided between the first reduction tank and the second reduction tank;

[0012] A third mud-reducing component is provided between the vertical flow labyrinth treatment mechanism, the first reduction tank, and the second reduction tank.

[0013] Furthermore, the first sludge discharge component includes a sludge lifting pump and a sludge lifting pipeline;

[0014] The sludge lift pump is located at the bottom end of the vertical flow labyrinth treatment mechanism;

[0015] The inlet of the sludge lifting pipeline is connected to the sludge lifting pump, and the outlet of the sludge lifting pipeline is located at the beginning of the first reduction tank.

[0016] Furthermore, the second sludge discharge component includes a sludge return pump and a sludge return pipeline;

[0017] The sludge return pump is located at the bottom of the end of the second reduction tank;

[0018] The inlet of the sludge return pipeline is connected to the sludge return pump, and the outlet of the sludge return pipeline is located at the upper part of the beginning of the first reduction tank.

[0019] Furthermore, the third sludge discharge component includes a supernatant return pump, a first supernatant return pipe, and a second supernatant return pipe;

[0020] The first inlet of the first supernatant return pipe is located at the upper part of the first reduction tank, the second inlet of the first supernatant return pipe is located at the upper part of the second reduction tank, and the outlet of the first supernatant is connected to the inlet of the supernatant return pump.

[0021] The inlet of the second supernatant return pipe is connected to the outlet of the supernatant return pump, and the second supernatant return pipe is located at the upper part of the starting end of the vertical flow labyrinth processing mechanism.

[0022] Furthermore, it also includes an air blower installed outside the reduction tank, the air blower including a blower, an air duct and multiple aeration heads;

[0023] The blower is located outside the volume reduction tank;

[0024] One end of the blower duct is connected to the air outlet of the blower;

[0025] The other end of the blower pipe is located at the bottom of the second reduction tank, and the aeration heads are respectively located on the blower pipe at the bottom of the second reduction tank.

[0026] Furthermore, the bottom of the first and second reduction tanks are respectively provided with a fourth row of mud and a fifth row of mud.

[0027] The fourth sludge discharge component includes a first sludge discharge pump and a first sludge discharge pipe, and the fifth sludge discharge component includes a second sludge discharge pump and a second sludge discharge pipe.

[0028] The inlet of the first sludge discharge pipe is connected to the first sludge discharge pump, and the outlet of the first sludge discharge pipe is located outside the reduction tank.

[0029] The inlet of the second sludge discharge pipe is connected to the second sludge discharge pump, and the outlet of the second sludge discharge pipe is located outside the reduction tank.

[0030] The outlets of the first sludge discharge pipe and the second sludge discharge pipe are connected outside the reduction tank.

[0031] Furthermore, ventilation holes are provided at the top of both the first and second reduction tanks.

[0032] Both the first and second reduction tanks are equipped with elbows through vent holes, and the ends of the elbows are provided with mesh.

[0033] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0034] 1. The sludge reduction device at the rear end of the vertical flow labyrinth treatment mechanism provided by this utility model addresses the issue of high concentration and complex composition of sludge generated by the vertical flow labyrinth treatment mechanism. By setting up a first sludge discharge component, the sludge generated within the vertical flow labyrinth treatment mechanism is pumped to a first reduction tank. Through the gradual biochemical action in the first and second reduction tanks, the organic matter in the sludge is consumed, resulting in an initial reduction in sludge volume. The second sludge discharge component transfers the sludge settled in the second reduction tank to the first reduction tank for further biochemical treatment. A third sludge discharge component returns the supernatant from the first and second reduction tanks to the vertical flow labyrinth treatment mechanism, creating a continuous cycle that further reduces sludge volume. This helps reduce environmental pollution in subsequent drying and incineration processes.

[0035] 2. The sludge reduction device at the rear end of the vertical flow labyrinth treatment mechanism provided by this utility model, by setting up a first reduction tank and a second reduction tank, with facultative anaerobic bacteria and anaerobic bacteria arranged in the rapid separation biochemical balls of the first reduction tank, and aerobic bacteria arranged in the rapid separation biochemical balls of the second reduction tank; and by maintaining the first reduction tank and the second reduction tank in anaerobic and aerobic environments respectively; combined with the first sludge discharge component, the second sludge discharge component, the third sludge discharge component and the vertical flow labyrinth treatment mechanism, the sludge can undergo nitrification, denitrification, anaerobic and aerobic reactions repeatedly, continuously consuming the organic matter in the sludge, thus reducing the overall sludge volume; at the same time, the nitrification, denitrification, anaerobic and aerobic reactions can transform the easily putrefied and unstable organic matter in the sludge into stable substances, reducing the content of pathogenic bacteria and pollutants in the sludge, thereby reducing the odor, flue gas content and other pollution problems generated in the subsequent drying and incineration stages. Attached Figure Description

[0036] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0037] Figure 2 This is a schematic diagram of the mud passage hole arrangement in an embodiment of this utility model.

[0038] Explanation of reference numerals in the attached drawings: 1-Vertical flow labyrinth treatment mechanism, 2-Sludge reduction mechanism, 21-First reduction tank, 212-Sludge passage hole, 22-Second reduction tank, 23-Rapid separation biochemical ball, 24-Support plate, 25-Elbow, 3-First sludge discharge component, 31-Sludge lifting pump, 32-Sludge lifting pipe, 4-Second sludge discharge component, 41-Sludge return pump, 42-Sludge return pipe, 5-Third sludge discharge component, 51-Supernatant return pump, 52-First supernatant return pipe, 53-Second supernatant return pipe, 6-Blower component, 61-Blower, 62-Blower pipe, 63-Aeration head, 7-Fourth sludge discharge component, 71-First sludge discharge pump, 72-First sludge discharge pipe, 7-Fifth sludge discharge component, 81-Second sludge discharge pump, 82-Second sludge discharge pipe. Detailed Implementation

[0039] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] like Figure 1 As shown, a sludge reduction device at the rear end of a vertical flow labyrinth treatment mechanism includes a sludge reduction mechanism 2 disposed at the rear end of the vertical flow labyrinth treatment mechanism 1.

[0041] In this embodiment, the vertical flow labyrinth treatment mechanism adopts the existing VFL vertical flow labyrinth. The domestic sewage from the village is discharged into the vertical flow labyrinth treatment mechanism from the beginning. After undergoing biochemical treatment in the vertical flow labyrinth treatment mechanism 1, a high concentration of residual sludge is generated and discharged into the end compartment of the vertical flow labyrinth treatment mechanism 1.

[0042] A first sludge removal component 3 is provided between the vertical flow labyrinth treatment mechanism 1 and the sludge reduction mechanism 2. The sludge in the vertical flow labyrinth treatment mechanism 1 can be pumped to the sludge reduction mechanism 2 through the first sludge removal component 3.

[0043] The vertical flow labyrinth treatment unit 1 adopts a multi-stage biochemical treatment process. The generated residual sludge is stored in its end compartment. The first row of sludge pieces 3 is located at its bottom. The residual sludge is deposited in the compartment. The concentration of the residual sludge at the bottom is about 98%-99%. After the biochemical treatment at the front end of the vertical flow labyrinth treatment unit, the content of fiber and gravel in the residual sludge is extremely low.

[0044] The sludge reduction mechanism 2 may include a first reduction tank 21 and a second reduction tank 22.

[0045] Both the first reduction tank 21 and the second reduction tank 22 are equipped with rapid-decomposition biospheres 23. The rapid-decomposition biospheres 23 in the first reduction tank 21 contain facultative anaerobic bacteria and anaerobic bacteria; the rapid-decomposition biospheres 23 in the first reduction tank 21 also contain aerobic bacteria. The bottom of the first reduction tank 21 and the second reduction tank 22 are respectively equipped with support plates 24, and the rapid-decomposition biospheres 23 are respectively placed on the support plates 24.

[0046] Specifically, the first reduction tank 21 and the second reduction tank 22 are each filled with two-thirds of the rapid-digestion biochemical balls 23.

[0047] The first reduction tank 21 is an anaerobic environment. The sludge concentration in the first reduction tank 21 can be reduced by the respiration of facultative anaerobic bacteria and anaerobic bacteria attached to the rapid separation biochemical balls 23. If oxygen is introduced into the first reduction tank 21, the facultative anaerobic bacteria will first carry out aerobic respiration. After the oxygen in the first reduction tank 21 is exhausted, the facultative anaerobic bacteria will switch to anaerobic respiration. Under the biochemical action, the facultative anaerobic bacteria and anaerobic bacteria will initially reduce the amount of sludge in the first reduction tank 21.

[0048] The second reduction tank 22 is an aerobic environment. Aeration is achieved through blower 6 and aeration head 63 to maintain an aerobic environment in the second reduction tank 22. Under the action of biochemical action, the aerobic bacteria attached to the rapid separation biochemical balls 23 in the second reduction tank 22 further reduce the amount of sludge in the second reduction tank 22.

[0049] The first reduction tank 21 and the second reduction tank 22 are connected by a mud passage 212, such as Figure 2 As shown, the sludge passage holes 212 are arranged in two layers, with four to five holes in each layer, staggered, and located in the upper part of the first reduction tank 21 and the second reduction tank 22. Sludge is discharged from the end of the second reduction tank 22, and sludge enters from the front of the first reduction tank. The remaining sludge flows autonomously from the first reduction tank 21 to the second reduction tank 22.

[0050] A second sludge discharge device 4 is installed between the first reduction tank 21 and the second reduction tank 22. This device facilitates the transfer of 20% of the sludge settled at the end of the second reduction tank 22 to the first reduction tank 21 for further treatment. After undergoing endogenous aerobic respiration, the sludge at the end of the second reduction tank 22 has a very low oxygen content. The return flow is relatively small compared to the amount of sludge in the first reduction tank 21, and since it flows back to the front end, it will not significantly impact the overall anaerobic environment in the first reduction tank 21. Even if some oxygen-containing sludge is returned from the second reduction tank 22 to the first reduction tank 21, it can be depleted by the facultative anaerobic bacteria within the first reduction tank 21.

[0051] Ventilation holes are provided at the top of the first reduction pool 21 and the second reduction pool 22. Both the first reduction pool 21 and the second reduction pool 22 are equipped with 180° elbows 25 through the ventilation holes to discharge the small amount of gas generated in the first reduction pool 21 and the second reduction pool 22. The end of the elbow 25 is provided with a mesh to prevent mosquitoes from entering the first reduction pool 21 and the second reduction pool 22.

[0052] A third sludge assembly 5 is provided outside the vertical flow labyrinth treatment mechanism 1, the first reduction tank 21, and the second reduction tank 22. The third sludge assembly 5 facilitates the return of the supernatant in the first reduction tank 21 and the second reduction tank 22 to the front end of the vertical flow labyrinth treatment mechanism 1, so that the vertical flow labyrinth treatment mechanism 1 can treat the pollutants in the supernatant again and avoid pollution discharge.

[0053] In this embodiment, a vertical flow labyrinth treatment mechanism 1 is used, resulting in high-concentration and complex-composition sludge. The sludge concentration is initially reduced through endogenous respiration in the anaerobic environment of the first reduction tank 21. The sludge in the second reduction tank 22 is then reduced in an aerobic environment, further decreasing the sludge volume. The sludge and supernatant flow through the first, second, and third sludge layers 3, 4, and 5, respectively. Under the action of microorganisms within the rapid-separating bio-balls, the sludge undergoes repeated anaerobic, aerobic, nitrification, and denitrification processes both inside and outside the carrier and within the tank, continuously consuming organic matter and reducing sludge volume. Simultaneously, the supernatant is discharged, leading to a continuous increase in the bottom sludge concentration and an overall reduction in sludge volume. This process transforms easily perishable and unstable organic matter in the sludge into stable substances, reducing the content of pathogens and pollutants in the sludge, thereby reducing odor, flue gas content, and other pollution problems generated during subsequent drying and incineration processes.

[0054] like Figure 1 As shown, the first sludge component 3 may include a sludge lifting pump 31 and a sludge lifting pipe 32.

[0055] The base of the sludge lift pump 31 can be fixed to the bottom of the vertical flow labyrinth treatment mechanism 1 by bolts.

[0056] The inlet of the sludge lifting pipe 32 is connected to the sludge lifting pump 31, and the outlet of the sludge lifting pipe 32 is located at the top of the first reduction tank 21. Through the sludge lifting pump 31, the remaining sludge at the bottom of the end of the vertical flow labyrinth treatment mechanism 1 can be transferred to the first reduction tank 21 for treatment.

[0057] like Figure 1 , Figure 2 As shown, the first reduction tank 21 and the second reduction tank 22 are connected by mud passage holes 212. The mud passage holes 212 are provided in two layers, with four to five holes in each layer, arranged alternately. The mud passage holes 212 are located in the upper part of the first reduction tank 21 and the second reduction tank 22.

[0058] In this embodiment of the application, the sludge from the first reduction tank 21 is transferred to the second reduction tank 22 for further reduction treatment via the sludge passage 21.

[0059] like Figure 1 As shown, the second sludge discharge component 4 may include a sludge return pump 41 and a sludge return pipe 42.

[0060] The base of the sludge return pump 41 is bolted to the bottom of the second reduction tank 22.

[0061] The inlet of the sludge return pipe 42 is connected to the sludge return pump 41, and the outlet of the sludge return pipe 42 is located in the first reduction tank 21.

[0062] In this embodiment, the second sludge discharge component 4 facilitates the transfer of some of the sludge settled at the end of the second reduction tank 22 to the front end of the first reduction tank 21 for further reduction treatment.

[0063] like Figure 1 As shown, the third sludge discharge component 5 may include a supernatant return pump 51, a first supernatant return pipe 52, and a second supernatant return pipe 53.

[0064] The first inlet of the first supernatant return pipe 52 is located in the first reduction tank 21, and the second inlet of the first supernatant return pipe 52 is located in the second reduction tank 22. The outlet of the first supernatant is connected to the inlet of the supernatant return pump 51. The inlet of the second supernatant return pipe 53 is connected to the outlet of the supernatant return pump 51, and the second supernatant return pipe 53 is located above the vertical flow labyrinth treatment mechanism 1.

[0065] By adjusting the supernatant return pump 51, the supernatant return pump 51 can simultaneously extract the supernatant after sedimentation in the first reduction tank 21 and the second reduction tank 22, so that the supernatant is returned to the vertical flow labyrinth treatment mechanism 1 through the second supernatant return pipe 53 for recirculation treatment.

[0066] like Figure 1 As shown, it may also include a blower 6 disposed on the second reduction tank 22, the blower 6 including a blower 61, a blower duct 62 and a plurality of aeration heads 63.

[0067] A blower 61 is installed on the second reduction tank 22. One end of the blower pipe 62 is connected to the air outlet of the blower 61, and the other end of the blower pipe 62 is installed at the bottom of the second reduction tank 22. An aeration head 63 is installed at the bottom of the support plate 24, and the aeration head 63 is connected to the blower pipe 62 of the second reduction tank 22.

[0068] In this embodiment of the application, by setting an aeration head 63 in the second reduction tank 22, under the action of the blower 61, oxygen in the air is easily sent into the second reduction tank 22 through the blower pipe 62, so that the second reduction tank 22 maintains an aerobic environment, and the sludge is further treated under the biochemical action of aerobic microorganisms, thereby reducing the amount of sludge.

[0069] like Figure 1 As shown, the bottom of the first reduction tank 21 and the second reduction tank 22 are respectively provided with a fourth sludge discharge component 7 and a fifth sludge discharge component 8; the fourth sludge discharge component 7 includes a first sludge discharge pump 71 and a first sludge discharge pipe 72; the fifth sludge discharge component 8 includes a second sludge discharge pump 81 and a second sludge discharge pipe 82; the fourth sludge discharge component 7 is located at the bottom of the first reduction tank 21, the base of the first sludge discharge pump 71 is bolted to the bottom of the first reduction tank 21, and the outlet of the first sludge discharge pipe 72 is located outside the reduction tank 2;

[0070] The fifth sludge discharge component 8 is located at the bottom of the end of the second reduction tank 22. The base of the second sludge discharge pump 81 is bolted to the bottom of the second reduction tank 22. The outlet of the second sludge discharge pipe 82 is located outside the reduction tank 2.

[0071] The outlets of the first sludge discharge pipe 72 and the second sludge discharge pipe 82 are connected outside the reduction tank 2.

[0072] In this embodiment of the application, after the first reduction tank 21 and the second reduction tank 22 have been running for a period of time, if it is observed that the sludge concentration of the sludge supernatant in the first reduction tank 21 and the second reduction tank 22 is too high, the fourth sludge discharge device 7 and the fifth sludge discharge device 8 are started. The high-concentration sludge after stabilization treatment is transported out for disposal through the first sludge discharge pipe 72 and the second sludge discharge pipe 82.

[0073] To ensure the anaerobic environment within the first reduction tank 21, a one-way valve can be installed at the end of the elbow 25 at the top of the first reduction tank 21 to prevent air from entering the first reduction tank 21 through the elbow 25 and disrupting the anaerobic environment within the first reduction tank 21.

[0074] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0075] Working principle of this utility model:

[0076] First, domestic sewage from the village is discharged into the vertical flow labyrinth treatment unit 1. Under the biochemical action of the vertical flow labyrinth treatment unit 1, a high concentration of excess sludge is generated. The sludge lift pump 31 is adjusted, and the sludge is transported to the first reduction tank 21 by the sludge lift pipe 32. If oxygen is present in the first reduction tank 21, the facultative anaerobic bacteria in the rapid decomposition biospheres 23 in the first reduction tank 21 will decompose the sludge in the first reduction tank 21 aerobically in an aerobic environment. After the oxygen in the first reduction tank 21 is depleted, the facultative anaerobic bacteria and anaerobic bacteria will carry out anaerobic biochemical reactions in an anaerobic environment to decompose organic matter, thereby initially reducing the sludge concentration in the first reduction tank 21.

[0077] The sludge in the first reduction tank 21 moves from the first reduction tank 21 to the second reduction tank 22 through the sludge passage 212. The blower 61 is adjusted, and the blower 61 blows air into the second reduction tank 22 through the blower pipe 62 and multiple aeration heads 63. Under aerobic conditions, the microorganisms in the sludge are continuously in the endogenous respiration stage to carry out self-oxidation. During this process, biodegradable components are gradually oxidized into CO2 and H2O, etc., further reducing the amount of sludge in the second reduction tank 22.

[0078] Adjusting the sludge return pump 41, under the action of the sludge return pipe 42, transfers the sludge settled in the second reduction tank 22 to the first reduction tank 21 for further treatment, and repeats the cycle to achieve sludge reduction.

[0079] Simultaneously, the supernatant return pump 51 is adjusted, and the supernatant return pump 51 extracts the supernatant from the first reduction tank 21 and the second reduction tank 22 through the first supernatant return pipe 52, and returns the treated supernatant to the front end of the vertical flow labyrinth treatment mechanism 1 through the second supernatant return pipe 53, and repeats the cycle to achieve the treatment of residual sludge from rural domestic sewage.

[0080] After the reduction tank 2 has been running for a period of time, when the sludge concentration in the supernatant is too high, the fourth sludge discharge unit 7 and the fifth sludge discharge unit 8 are started. The high-concentration sludge after stabilization is transported out for disposal through the first sludge discharge pipe 72 and the second sludge discharge pipe 82.

[0081] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A sludge reduction device at the rear end of a vertical flow labyrinth treatment mechanism, characterized in that: Including a sludge reduction mechanism (2) located at the rear end of the vertical flow labyrinth treatment mechanism (1); A first sludge discharge component (3) is provided between the sludge reduction mechanism (2) and the vertical flow labyrinth treatment mechanism (1); The sludge reduction mechanism (2) includes a first reduction tank (21) and a second reduction tank (22); Both the first reduction tank (21) and the second reduction tank (22) are equipped with rapid separation biochemical balls (23); The first reduction tank (21) and the second reduction tank (22) are connected by a mud passage (212); A second sludge discharge component (4) is provided between the first reduction tank (21) and the second reduction tank (22); A third sludge removal device (5) is provided between the vertical flow labyrinth treatment mechanism (1), the first reduction tank (21), and the second reduction tank (22).

2. The sludge reduction device at the rear end of the vertical flow labyrinth treatment mechanism according to claim 1, characterized in that: The first sludge discharge component (3) includes a sludge lifting pump (31) and a sludge lifting pipe (32); The sludge lifting pump (31) is located at the bottom end of the vertical flow labyrinth treatment mechanism (1); The inlet of the sludge lifting pipe (32) is connected to the sludge lifting pump (31), and the outlet of the sludge lifting pipe (32) is located at the beginning of the first reduction tank (21).

3. The sludge reduction device at the rear end of the vertical flow labyrinth treatment mechanism according to claim 1, characterized in that: The second sludge discharge component (4) includes a sludge return pump (41) and a sludge return pipe (42); The sludge return pump (41) is located at the bottom of the end of the second reduction tank (22); The inlet of the sludge return pipe (42) is connected to the sludge return pump (41), and the outlet of the sludge return pipe (42) is located at the upper part of the beginning of the first reduction tank (21).

4. The sludge reduction device at the rear end of the vertical flow labyrinth treatment mechanism according to claim 1, characterized in that: The third sludge discharge component (5) includes a supernatant return pump (51), a first supernatant return pipe (52), and a second supernatant return pipe (53); The first inlet of the first supernatant return pipe (52) is located at the upper part of the first reduction tank (21), the second inlet of the first supernatant return pipe (52) is located at the upper part of the second reduction tank (22), and the outlet of the first supernatant is connected to the inlet of the supernatant return pump (51). The inlet of the second supernatant return pipe (53) is connected to the outlet of the supernatant return pump (51), and the second supernatant return pipe (53) is located at the upper part of the starting end of the vertical flow labyrinth processing mechanism (1).

5. The sludge reduction device at the rear end of the vertical flow labyrinth treatment mechanism according to claim 1, characterized in that: It also includes an air blower (6) installed outside the sludge reduction mechanism (2), the air blower (6) including a blower (61), an air duct (62) and multiple aeration heads (63); The blower (61) is located outside the sludge reduction mechanism (2); One end of the blower duct (62) is connected to the air outlet of the blower (61); The other end of the blower pipe (62) is located at the bottom of the second reduction tank (22), and the aeration heads (63) are respectively located on the blower pipe (62) at the bottom of the second reduction tank (22).

6. The sludge reduction device at the rear end of the vertical flow labyrinth treatment mechanism according to claim 1, characterized in that: The bottom of the first reduction tank (21) and the second reduction tank (22) are respectively provided with a fourth row of mud components (7) and a fifth row of mud components (8); The fourth sludge discharge component (7) includes a first sludge discharge pump (71) and a first sludge discharge pipe (72), and the fifth sludge discharge component (8) includes a second sludge discharge pump (81) and a second sludge discharge pipe (82). The inlet of the first sludge discharge pipe (72) is connected to the first sludge discharge pump (71), and the outlet of the first sludge discharge pipe (72) is located outside the sludge reduction mechanism (2). The inlet of the second sludge discharge pipe (82) is connected to the second sludge discharge pump (81), and the outlet of the second sludge discharge pipe (82) is located outside the sludge reduction mechanism (2). The outlets of the first sludge discharge pipe (72) and the second sludge discharge pipe (82) are connected externally to the sludge reduction mechanism (2).

7. The sludge reduction device at the rear end of the vertical flow labyrinth treatment mechanism according to claim 1, characterized in that: Ventilation holes are provided at the top of both the first reduction tank (21) and the second reduction tank (22); Both the first reduction tank (21) and the second reduction tank (22) are equipped with elbows (25) through ventilation holes, and the ends of the elbows (25) are provided with mesh.

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