Adaptive control sewage sludge discharge system and control method

Abstract

The present invention proposes an adaptively controlled sewage sludge discharge system and control method, which belongs to the technical field of sewage treatment. The sewage sludge discharge system includes a sedimentation device, a sludge pump and a control cabinet. The sedimentation device is connected to the sewage inlet; the sedimentation device has multiple pollutant detection devices built in; the multiple pollutant detection devices are used to obtain at least one sewage index value of the sewage entering the sedimentation device; the control cabinet communicates with the multiple pollutant detection devices; the control cabinet controls the first working state of the sedimentation device based on at least one sewage index value; and / or controls the second working state of the sludge pump. Based on the technical solution of the present invention, the start and stop state of the sludge pump in the sewage sludge discharge system, the rotation state of the start and stop power / sludge suction pipe combination structure, etc., all adaptively follow the current real-time influent water quality, water volume change value and change trend of the sewage, and can better adapt to the actual sewage generation environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and in particular relates to an adaptively controlled sewage sludge discharge system and a control method. Background Art

[0002] Wastewater treatment, also known as sewage treatment, mainly uses physical (filtration, sedimentation), chemical (chemical reaction) and biological (biological consumption) methods to eliminate pollutants in water.

[0003] The existing technology uses a 5-stage activated sludge process (SBR) to treat sewage:

[0004] 1. The first stage is the water inlet period. During this period, sewage continuously enters the reaction tank until it reaches the highest operating level.

[0005] 2. The second stage is the aeration and oxygenation period. During this period, the aeration system is turned on to aerate the reaction pool to allow the pollutants in the pool to undergo biochemical decomposition.

[0006] 3. The third stage is the sedimentation period. During this period, the reaction tank enters the sedimentation state and performs mud and water separation.

[0007] 4. The fourth stage is the drainage period, during which the separated supernatant is discharged.

[0008] 5. The fifth stage is the no-load sludge discharge period. Part of the activated sludge separated by sedimentation is discharged as residual sludge as required, and the other part is left in the tank as bacterial seed, preparing for the first stage of work.

[0009] The third stage, sedimentation, requires efficient sludge-water separation so that the activated sludge separated by sedimentation can be discharged as residual sludge in the fifth stage. Existing sewage treatment systems achieve this separation using simple sedimentation tanks and promptly discharge the resulting excess sludge via sludge suction pumps to ensure that tailwater meets discharge standards. To promptly remove sludge, self-priming pumps often need to operate for extended periods, sometimes around the clock. This control method is essential when sewage inflow is high and continuous.

[0010] However, in certain special circumstances, such as rural domestic sewage sources and urban catering wastewater sources, wastewater generation is not characterized by a high and continuous inflow. Instead, it exhibits significant variability in influent quality and volume, with concentrated generation. For example, in the catering industry, this is manifested in high volumes in the morning, afternoon, and evening, with minimal flow at other times. If existing sludge discharge systems and traditional control methods are still used, energy consumption will increase and treatment efficiency will decrease, making them inadequate for the wastewater generation characteristics of these special environments. Summary of the Invention

[0011] In order to solve the above technical problems, the present invention proposes an adaptively controlled sewage sludge discharge system and control method.

[0012] In a first aspect of the present invention, an adaptively controlled sewage sludge discharge system is provided, wherein the sewage sludge discharge system includes a sewage inlet.

[0013] The sewage sludge discharge system includes a sedimentation device, which is connected to the sewage inlet;

[0014] The sedimentation device is equipped with a plurality of pollutant detection devices; the plurality of pollutant detection devices are used to obtain at least one sewage index value of the sewage entering the sedimentation device through the sewage inlet;

[0015] The sewage sludge discharge system also includes a sludge discharge pump and a control cabinet;

[0016] The control cabinet is in communication with the plurality of contaminant detection devices;

[0017] The control cabinet controls the first working state of the sedimentation device based on at least one sewage index value obtained by the multiple pollutant detection devices;

[0018] And / or, the control cabinet controls the second working state of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices.

[0019] The control cabinet is a PLC control cabinet, and the PLC control cabinet includes a first rotation PLC control cabinet and a second mud pump PLC control cabinet.

[0020] The control cabinet controls the first working state of the sedimentation device based on at least one sewage index value obtained by the multiple pollutant detection devices through the first rotary PLC control cabinet;

[0021] The control cabinet controls the second working state of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices through the second sludge pump PLC control cabinet.

[0022] The sedimentation device is built-in with a mud suction pipe combination structure, which includes a vertically arranged mud suction main pipe and a plurality of mud suction branch pipes connected to the mud suction main pipe combination;

[0023] The mud suction main pipe comprises a rotating shaft, and the mud suction assembly structure as a whole can rotate around the rotating shaft;

[0024] The control cabinet controls the first working state of the sedimentation device based on at least one sewage index value obtained by the multiple pollutant detection devices, specifically including:

[0025] The control cabinet controls the mud suction pipe assembly structure of the sedimentation device to rotate clockwise, counterclockwise, or stop rotating based on at least one sewage index value obtained by the multiple pollutant detection devices.

[0026] The mud discharge pump is in communication with the mud discharge outlet;

[0027] The control cabinet controls the second working state of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices, specifically including:

[0028] The control cabinet turns off the sludge pump, starts the sludge pump, and adjusts the power of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices.

[0029] The multiple pollutant detection devices are used to obtain multiple sewage index values ​​of the sewage entering the sedimentation device through the sewage inlet, the multiple sewage index values ​​including sewage flow values ​​and target pollutant index values, and the target pollutant index values ​​include at least one of the following sewage index values:

[0030] SS value, COD value, BOD value, TSS value.

[0031] The multiple pollutant detection devices include a sewage flow meter and a target pollutant detection device. The sewage flow meter is used to obtain the sewage flow value of the sewage entering the sedimentation device through the sewage inlet, and the target pollutant detection device is used to obtain the target pollutant index value of the sewage entering the sedimentation device through the sewage inlet.

[0032] In a second aspect of the present invention, a control method is provided. The control method is applied to the sewage sludge discharge system described in the first aspect. The sewage sludge discharge system includes a sedimentation device having a built-in sludge suction pipe assembly structure, a sludge discharge pump, and multiple pollutant detection devices. The multiple pollutant detection devices include a sewage flow meter and a target pollutant detection device. The sewage flow meter is used to obtain a sewage flow value of sewage entering the sedimentation device, and the target pollutant detection device is used to obtain at least one target pollutant index value of the sewage entering the sedimentation device. The sludge suction pipe assembly structure as a whole is rotatable along a rotation axis.

[0033] The control method comprises the following steps:

[0034] S1: Determine whether the sewage flow rate value of the sewage entering the sedimentation device obtained by the sewage flow meter is greater than a first preset value;

[0035] If yes, start the mud pump at a first power;

[0036] S2: Determine whether the target pollutant index value of the sewage entering the sedimentation device obtained by the target pollutant detection device is greater than a first preset limit value corresponding to the target pollutant;

[0037] If yes, rotate the mud suction pipe assembly structure clockwise and proceed to step S3;

[0038] If not, the mud suction pipe assembly structure is placed in a static state; and the process returns to step S1;

[0039] S3: After a preset time period, determining whether the target pollutant index value of the sewage entering the sedimentation device obtained by the target pollutant detection device is still greater than the first preset limit value corresponding to the target pollutant;

[0040] If yes, rotating the sludge suction pipe assembly structure counterclockwise and then clockwise alternately with the preset time length as a cycle, and returning to step S2;

[0041] If not, return to step S1.

[0042] In the step S1, if it is determined that the sewage flow rate value of the sewage entering the sedimentation device obtained by the sewage flow meter is not greater than a first preset value, the sludge pump is turned off after the preset time period.

[0043] In step S3, if after a preset time period, it is determined that the target pollutant index value of the sewage entering the sedimentation device obtained by the target pollutant detection device is still greater than the first preset limit value corresponding to the target pollutant, the sludge pump is operated at a second power, and the second power is greater than the first power.

[0044] The target pollutant detection device includes an SS monitor, and the target pollutant index value includes at least one of an SS value, a COD value, a BOD value, and a TSS value.

[0045] The mud suction pipe assembly structure includes a mud suction main pipe and a plurality of mud suction branch pipes; the plurality of mud suction branch pipes are symmetrically combined with the mud suction main pipe and communicated with the mud suction main pipe, and the mud suction pump is connected to the mud suction main pipe.

[0046] Based on the technical solution of the present invention, the start and stop status of the sludge pump in the sewage sludge discharge system, the rotation status of the start and stop power / sludge suction pipe combination structure, etc., all adaptively follow the current real-time influent water quality, water volume change value and change trend of the sewage, and can better adapt to the actual sewage generation environment.

[0047] Further advantages of the present invention will be further reflected in detail in the specific embodiments section in conjunction with the drawings of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 1 is a schematic structural diagram of an adaptively controlled sewage sludge discharge system according to an embodiment of the present invention;

[0050] Figure 2 It is a schematic diagram of the combined structure of the built-in sludge suction pipe of the above-mentioned sewage sludge discharge system;

[0051] Figure 3 This is a schematic diagram of the engineering connection structure design of the above-mentioned sewage sludge discharge system;

[0052] Figure 4 yes Figure 1 Flowchart of the control method of the adaptively controlled sewage sludge discharge system. DETAILED DESCRIPTION

[0053] The invention is further described below with reference to the accompanying drawings and specific implementation methods.

[0054] Figure 1 It is a structural schematic diagram of an adaptively controlled sewage sludge discharge system according to an embodiment of the present invention.

[0055] exist Figure 1 , it is shown that the sewage sludge discharge system includes a sewage inlet, a sedimentation device, multiple pollutant detection devices, a sludge discharge pump and a control cabinet.

[0056] The control cabinet communicates with the multiple pollutant detection devices, the sedimentation device, the mud pump and the control cabinet.

[0057] Specifically, the sedimentation device is communicated with the sewage inlet. The sedimentation device may be a sedimentation tank.

[0058] The sedimentation device has a plurality of built-in pollutant detection devices; the plurality of pollutant detection devices are used to obtain at least one sewage index value of the sewage entering the sedimentation device through the sewage inlet.

[0059] As a more specific embodiment, the multiple pollutant detection devices are used to obtain multiple sewage index values ​​of the sewage entering the sedimentation device through the sewage inlet.

[0060] The multiple pollutant detection devices include a sewage flow meter and a target pollutant detection device. The sewage flow meter is used to obtain the sewage flow value of the sewage entering the sedimentation device through the sewage inlet, and the target pollutant detection device is used to obtain the target pollutant index value of the sewage entering the sedimentation device through the sewage inlet.

[0061] The plurality of sewage index values ​​include sewage flow values ​​and target pollutant index values, and the target pollutant index value includes at least one of the following sewage index values:

[0062] SS value, COD value, BOD value, TSS value.

[0063] SS stands for suspended solids. The SS value refers to the concentration of solid matter suspended in water. Suspended solids (SS) in water is defined as the solid matter retained on a 0.45μm filter membrane after the water sample passes through it and is then dried to a constant weight at 103-105°C.

[0064] COD stands for Chemical Oxygen Demand. The COD value refers to the amount of oxidant consumed when chemical oxidants are used to oxidize reducing substances in sewage.

[0065] BOD (abbreviation of Biochemical Oxygen Demand): Biochemical oxygen demand or biochemical oxygen consumption (generally refers to the five-day biochemical oxygen demand). The BOD value refers to the amount of dissolved oxygen consumed by microorganisms when they oxidize reducing substances in sewage through biochemical reactions.

[0066] TSS is similar to SS, but TSS stands for total suspended solids, the total suspended matter in water. It's a key indicator of water pollution, measured in mg / L.

[0067] The control cabinet controls the first working state of the sedimentation device based on at least one sewage index value obtained by the multiple pollutant detection devices;

[0068] And / or, the control cabinet controls the second working state of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices.

[0069] The sludge pump is also called a self-priming pump, which extracts sediment sludge from the sludge outlet in the sedimentation tank and discharges it into the sludge drying tank.

[0070] As a further improvement, the sedimentation device is built with a mud suction pipe combination structure, which includes a vertically arranged mud suction main pipe and a plurality of mud suction branch pipes connected to the mud suction main pipe combination;

[0071] The mud suction main pipe comprises a rotating shaft, and the mud suction assembly structure as a whole can rotate around the rotating shaft;

[0072] The control cabinet controls the first working state of the sedimentation device based on at least one sewage index value obtained by the multiple pollutant detection devices, specifically including:

[0073] The control cabinet controls the mud suction pipe assembly structure of the sedimentation device to rotate clockwise, counterclockwise, or stop rotating based on at least one sewage index value obtained by the multiple pollutant detection devices.

[0074] The mud discharge pump is in communication with the mud discharge outlet;

[0075] The control cabinet controls the second working state of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices, specifically including:

[0076] The control cabinet turns off the sludge pump, starts the sludge pump, and adjusts the power of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices.

[0077] exist Figure 2 It can be seen that the multiple mud suction branch pipes are symmetrically combined with the mud suction main pipe and are connected to the mud suction main pipe;

[0078] Multiple sections of filter screens are evenly distributed on the mud suction main pipe.

[0079] The sludge suction pipe assembly structure includes a rotation axis, which is a vertical line running vertically along the main suction pipe. The assembly can rotate 360° clockwise or counterclockwise along this vertical rotation axis. During rotation, the sludge-laden wastewater inside the main and branch pipes is accelerated and discharged along the main pipe due to the interaction of centrifugal and centripetal forces.

[0080] Of course, it is worth pointing out that in actual operation, the rotation speed of the sludge suction pipe assembly structure when in a rotating state is relatively low, for example, one rotation per minute (360° / min) or two rotations per minute (720° / min), and not more than 5 rotations per minute, so as to avoid excessive rotation and reducing the subsequent sedimentation rate of the sludge.

[0081] Figure 3 It is a schematic diagram of the engineering connection structure design of the above-mentioned sewage sludge discharge system.

[0082] exist Figure 3 In the process, the sewage to be treated enters the sedimentation tank.

[0083] It is understandable that the sewage to be treated here is not raw sewage. Raw sewage needs to undergo certain pretreatment before entering the sedimentation tank to perform the mud-water separation process.

[0084] For example, for rural domestic sewage, it first enters the screen well, where it is intercepted by a mechanical screen to remove floating particles with a diameter greater than 2mm to prevent clogging of subsequent pumps and pipes. It then enters the mixing and regulating tank, where the water quality and quantity are regulated. At the same time, the feces and wastewater are fully mixed in the tank to achieve a certain biochemical reduction / oxidation reaction before entering the Figure 3 The sedimentation tank is used for mud-water separation.

[0085] exist Figure 3 In the embodiment, the sludge suction pump is connected to the middle position of the main pipe of the sludge suction pipe combination structure built into the sedimentation tank. In this case, since the sludge suction pipe combination structure is in a rotating state, the sludge suction pump is not physically contact-connected, but is close to the sludge discharge outlet at the middle position corresponding to the sludge suction main pipe.

[0086] In another embodiment, the dredge suction pump is connected to the bottom of the main pipe of the dredge suction pipe assembly structure built into the sedimentation tank. In this case, since the dredge suction pipe assembly structure may be in a rotating state, the dredge suction pump is not physically connected to the main pipe. Instead, it is sufficient to be close to the middle position of the dredge suction pipe corresponding to the dredge discharge outlet. Figure 1 Schematic diagram of the mud discharge outlet being connected to a mud suction pump).

[0087] based on Figure 1-Figure 3 , Figure 4 A flow chart is provided to introduce the adaptive control method for the sewage sludge discharge system mentioned in the aforementioned embodiment of the present application.

[0088] As mentioned above, the sewage sludge discharge system includes a sedimentation device, which has a built-in sludge suction pipe combination structure, a sludge discharge pump and multiple pollutant detection devices. The multiple pollutant detection devices include a sewage flow meter and a target pollutant detection device. The sewage flow meter is used to obtain the sewage flow value of the sewage entering the sedimentation device, and the target pollutant detection device is used to obtain at least one target pollutant index value of the sewage entering the sedimentation device; the sludge suction pipe combination structure as a whole can rotate along the rotation axis.

[0089] Therefore, in practical applications, the control method includes the following steps:

[0090] S1: Determine whether the sewage flow rate value of the sewage entering the sedimentation device obtained by the sewage flow meter is greater than a first preset value;

[0091] If yes, start the mud pump at a first power;

[0092] S2: Determine whether the target pollutant index value of the sewage entering the sedimentation device obtained by the target pollutant detection device is greater than a first preset limit value corresponding to the target pollutant;

[0093] If yes, rotate the mud suction pipe assembly structure clockwise and proceed to step S3;

[0094] If not, the mud suction pipe assembly structure is placed in a static state; and the process returns to step S1;

[0095] S3: After a preset time period, determining whether the target pollutant index value of the sewage entering the sedimentation device obtained by the target pollutant detection device is still greater than the first preset limit value corresponding to the target pollutant;

[0096] If yes, rotating the sludge suction pipe assembly structure counterclockwise and then clockwise alternately with the preset time length as a cycle, and returning to step S2;

[0097] If not, return to step S1.

[0098] In step S3, if after a preset time period, it is determined that the target pollutant index value of the sewage entering the sedimentation device obtained by the target pollutant detection device is still greater than the first preset limit value corresponding to the target pollutant, the sludge pump is operated at a second power, and the second power is greater than the first power.

[0099] In the step S1, if it is determined that the sewage flow rate value of the sewage entering the sedimentation device obtained by the sewage flow meter is not greater than a first preset value, the sludge pump is turned off after the preset time period.

[0100] It can be understood that the adaptively controlled sewage sludge discharge system of the present invention is applicable to various sewage treatment occasions requiring mud-water separation and sludge discharge.

[0101] While existing sewage treatment systems use simple sedimentation tanks to separate mud and water, and use sludge pumps to promptly discharge excess sludge, essentially ensuring that tailwater meets discharge standards, self-priming pumps typically need to operate for extended periods, sometimes around the clock, to remove the sludge promptly. This consumes significant energy, making this method economically viable only when sewage inflow is high and lasts for extended periods.

[0102] However, in certain special environments, such as rural domestic sewage sources and urban catering wastewater sources, wastewater generation is not characterized by "large inflows and long durations." Instead, it exhibits significant variability in inflow quality and volume, with concentrated water generation. For example, in the catering industry, this is manifested in high volumes in the morning, afternoon, and evening, with minimal flow at other times. If existing sludge discharge systems and traditional control methods are still used, energy consumption will increase and treatment efficiency will decrease, making them inadequate for the wastewater generation characteristics of these special environments.

[0103] The technical solution of this application can better solve the sewage treatment problems in these special scenarios.

[0104] Taking the domestic sewage treatment in a rural area in the north as an example, the multiple pollutant detection devices include a sewage flow meter and an SS monitor.

[0105] At this time, the control method specifically operates as follows:

[0106] S1: Determine whether the sewage flow rate value of the sewage entering the sedimentation device obtained by the sewage flow meter is greater than a first preset value;

[0107] If yes, start the mud pump at a first power;

[0108] S2: Determine whether the SS value obtained by the SS monitor is greater than a first preset SS limit value;

[0109] The first preset SS limit is preferably 30 mg / L;

[0110] If yes, the sludge suction pipe assembly structure is rotated clockwise at a rotation rate of 360° / min (i.e., one rotation per minute), and the process proceeds to step S3;

[0111] If not, the mud suction pipe assembly structure is placed in a static state; and the process returns to step S1;

[0112] S3: After a preset time period, determining whether the SS value obtained by the SS monitor is still greater than a first preset SS limit value;

[0113] If yes, rotating the sludge suction pipe assembly structure counterclockwise and then clockwise alternately with the preset time length as a cycle, and returning to step S2;

[0114] For example, after 10 minutes of clockwise rotation, it is determined whether the SS value obtained by the SS monitor is still greater than 30 mg / L;

[0115] If yes, rotate the sludge suction pipe assembly structure clockwise at a rotation rate of 360° / min for 10 minutes, and then rotate the sludge suction pipe assembly structure clockwise at a rotation rate of 360° / min for 10 minutes, and repeat the cycle. Return to step S2 at the end of each 10 minutes.

[0116] If not, return to step S1.

[0117] Other steps can be adapted to see Figure 4 Schematic diagram of the steps.

[0118] The applicant has successfully implemented this technical solution in many rural areas. Its economy, efficiency and various indicators have reached or exceeded relevant industry standards and have been widely reported and promoted.

[0119] Of course, when applied to rural domestic sewage treatment in this embodiment, the indicators considered are sewage flow rate and SS value; when applied to sewage treatment in other scenarios, the indicators considered should also be adaptively adjusted according to industry practices, such as using sewage flow rate and COD value. In other words, the multiple sewage index values ​​must include sewage flow rate. As for the specific selection of other target pollutant index values, one or more are selected based on the experience of those skilled in the art and industry standards. These changes that do not require creative work should all fall within the scope of protection of this invention.

[0120] It can be seen that based on the technical solution of the present invention, the start and stop status of the sludge pump in the sewage sludge discharge system, the rotation status of the start and stop power / sludge suction pipe combination structure, etc., all adaptively follow the current real-time influent water quality, water volume change value and change trend of the sewage, and can better adapt to the actual sewage generation environment.

[0121] In the various embodiments of the present invention, the embodiments of the present invention have been shown and described, but it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control method for a sewage sludge discharge system, wherein the sewage sludge discharge system includes a sedimentation device having a built-in sludge suction pipe combination structure and a sludge discharge pump; It is characterized by: The control method comprises the following steps: S1: Determine whether the sewage flow rate of the sewage entering the sedimentation device is greater than a first preset value; If yes, start the mud pump at a first power; S2: Determine whether the target pollutant index value of the sewage entering the sedimentation device is greater than a first preset limit value corresponding to the target pollutant; If yes, rotate the mud suction pipe assembly structure clockwise and proceed to step S3; If not, the mud suction pipe assembly structure is placed in a static state; Return to step S1; S3: After a preset time period, determining whether the target pollutant index value of the sewage entering the sedimentation device is still greater than the first preset limit value corresponding to the target pollutant; If yes, rotating the sludge suction pipe assembly structure counterclockwise and then clockwise alternately with the preset time length as a cycle, and returning to step S2; If not, return to step S1; In step S3, if after a preset period of time, it is determined that the target pollutant index value of the sewage entering the sedimentation device is still greater than the first preset limit value corresponding to the target pollutant, the sludge pump is operated at a second power, which is greater than the first power.

2. A control method for a sewage sludge discharge system according to claim 1, characterized in that: In the step S1, if it is determined that the sewage flow rate value of the sewage entering the sedimentation device is not greater than a first preset value, the sludge pump is turned off after the preset time period.

3. An adaptively controlled sewage sludge discharge system, used to implement the control method of the sewage sludge discharge system according to claim 1 or 2, The sewage sludge discharge system includes a sewage inlet, characterized by: The sedimentation device is built with multiple pollutant detection devices, and the multiple pollutant detection devices include a sewage flow meter and a target pollutant detection device; The sedimentation device is in communication with the sewage inlet; The plurality of pollutant detection devices are used to obtain at least one sewage index value of the sewage entering the sedimentation device through the sewage inlet; The sewage sludge discharge system also includes a sludge discharge pump and a control cabinet; The control cabinet is in communication with the plurality of contaminant detection devices; The control cabinet controls the first working state of the sedimentation device based on at least one sewage index value obtained by the multiple pollutant detection devices; And / or, the control cabinet controls the second working state of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices.

4. The sewage sludge discharge system according to claim 3, characterized in that: The mud suction pipe assembly structure includes a vertically arranged mud suction main pipe and a plurality of mud suction branch pipes in assembly communication with the mud suction main pipe; The mud suction main pipe comprises a rotating shaft, and the mud suction pipe assembly structure as a whole can rotate around the rotating shaft; The control cabinet controls the first working state of the sedimentation device based on at least one sewage index value obtained by the multiple pollutant detection devices, specifically including: The control cabinet controls the mud suction pipe assembly structure of the sedimentation device to rotate clockwise, counterclockwise, or stop rotating based on at least one sewage index value obtained by the multiple pollutant detection devices.

5. The sewage sludge discharge system according to claim 3, characterized in that: The sewage sludge discharge system includes a sludge discharge outlet; The mud discharge pump is in communication with the mud discharge outlet; The control cabinet controls the second working state of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices, specifically including: The control cabinet turns off the sludge pump, starts the sludge pump, and adjusts the power of the sludge pump based on at least one sewage index value obtained by the multiple pollutant detection devices.

6. The sewage sludge discharge system according to claim 3, characterized in that: The sewage index value includes a sewage flow value and a target pollutant index value, and the target pollutant index value includes at least one of the following sewage index values: SS value, COD value, BOD value, and TSS value.

7. The sewage sludge discharge system according to claim 3, characterized in that: The sewage flow meter is used to obtain the sewage flow value of the sewage entering the sedimentation device through the sewage inlet, and the target pollutant detection device is used to obtain the target pollutant index value of the sewage entering the sedimentation device through the sewage inlet.

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