Sewage treatment biochemical reaction tank and sewage treatment system
By setting up a third control pipeline and a linked aeration and mixing module in the biochemical reaction tank, the direct return and mixing of sludge is achieved, solving the problem of nitrogen and phosphorus removal under low carbon-nitrogen ratio conditions, improving wastewater treatment efficiency and reducing costs.
Patent Information
- Application Number
- CN202422790141.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-14
AI Technical Summary
Existing wastewater treatment systems are ineffective at removing nitrogen and phosphorus under low carbon-to-nitrogen ratio conditions, and excessive reflux ratios can disrupt process conditions, making it difficult to achieve design goals.
A third control pipeline is installed in the biochemical reaction tank to directly return the sludge to the second switching zone and mix it with the sewage. Combined with the linkage of the aeration module and the stirring module, denitrification under anoxic conditions is achieved, reducing the dependence on carbon sources and phosphorus removal agents.
It improved the effluent treatment standards, reduced construction and operating costs, enhanced the system's resistance to shock loads, and simplified operation and management.
Smart Images
Figure CN223496303U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater treatment biochemical reaction tank and wastewater treatment system. Background Technology
[0002] Currently, most wastewater treatment plants in China adhere to the Class A standard of the "Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants" (GB18918-2002), with a total nitrogen concentration of 15 mg / L and total phosphorus concentration of 0.5 mg / L. However, due to significant fluctuations in influent water quality and quantity at urban wastewater treatment plants, as well as substantial seasonal (dry and rainy seasons, winter and summer) and temporal (day and night) variations, the influent carbon source is insufficient, resulting in a low carbon-to-nitrogen ratio (C / N), making nitrogen and phosphorus removal difficult. The commonly used main processes for urban wastewater treatment include AAO, multi-stage AO, and MBR processes. Their nitrogen removal efficiency is limited not only by the imbalance of the influent C / N ratio but also by the recirculation ratio. An excessively high recirculation ratio can disrupt process conditions and the process environment, making it difficult to achieve the designed carbon, nitrogen, and phosphorus removal targets.
[0003] CN116553725B discloses an AOA system and method for treating urban wastewater with a low carbon-to-nitrogen ratio, relating to the field of wastewater treatment technology. The AOA system includes: an equalization tank, a biological treatment tank, a secondary sedimentation tank, and an automatic control system. The biological treatment tank is divided into more than four reaction zones, including an anaerobic zone, an aerobic zone, an anoxic zone, and a transition zone. Aeration devices are installed in the transition zone and the aerobic zone. Ammonia nitrogen sensors are installed in the equalization tank, the aerobic zone, and the transition zone. The aeration devices and ammonia nitrogen sensors are all connected to the automatic control system.
[0004] The above-mentioned technical solution involves adding a carbon source to the anaerobic zone through the first pipe, which helps to rapidly enrich endogenous denitrifying bacteria. The second pipe increases the sludge concentration in the anoxic zone to accelerate denitrification and simultaneously introduces an external carbon source generated by fermentation in the sedimentation tank to further enhance the denitrification effect. However, the second pipe in this technical solution is connected to the anoxic zone, meaning that when the second transition zone switches to an anoxic state, the wastewater still needs to pass through the second transition zone before reaching the anoxic zone and mixing with the returned sludge. Utility Model Content
[0005] The purpose of this invention is to solve the aforementioned problems by providing a wastewater treatment biochemical reactor. The reactor's return unit is equipped with a third control pipeline for returning sludge from an external sludge-water separation unit to a second switching zone. This third control pipeline is linked to the aeration and stirring modules within the second switching zone, enabling direct sludge return to the second switching zone when it switches to an anoxic state. Furthermore, the third control pipeline is connected to the inlet of the second switching zone, allowing wastewater to mix with the sludge upon entering the anoxic zone, further enhancing denitrification. Simultaneously, this application also provides a wastewater treatment system that achieves higher effluent treatment standards without the addition of carbon sources and phosphorus removal agents. This significantly reduces construction investment costs, operating costs, enhances the system's resistance to shock loads, and simplifies operation and management.
[0006] To achieve the above objectives, this application adopts the following technical solution:
[0007] A wastewater treatment biochemical reactor includes an anaerobic zone, a first switching zone, an aerobic zone, a second switching zone, and an anoxic zone connected in sequence. The anoxic zone is connected to an external sludge-water separation unit, and the reactor also includes a reflux unit.
[0008] The reflux unit is equipped with a first control pipeline for controlling the sludge reflux from the sludge separation unit to the anaerobic zone, a second control pipeline for reflux to the anoxic zone, and a third control pipeline for reflux to the second switching zone;
[0009] The third control line is connected to the feed inlet of the second switching zone;
[0010] The second switching zone is equipped with an aeration module and a mixing module for switching between aerobic and anoxic conditions.
[0011] When the aeration module is turned on, the stirring module is turned off, the second control line is turned on, and the third control line is turned off; when the stirring module is turned on, the aeration module is turned off, and the third control line is turned on, or both the second and third control lines are turned on.
[0012] Preferably, the feed inlet of the second switching zone is located at the upper part of the second switching zone; the feed inlet of the anoxic zone is located at the lower part of the anoxic zone, and the second control pipeline is connected to the feed inlet of the anoxic zone.
[0013] Preferably, a first control valve is provided on the second control pipeline, and a second control valve is provided on the third control pipeline. The first control valve, the second control valve, the aeration module, and the stirring module are linked together.
[0014] When the aeration module is turned on, the first control valve is turned on, the second control valve is turned off, and the stirring module is turned off.
[0015] When the stirring module is turned on, the first control valve is closed and the second control valve is turned on, or both the first and second control valves are turned on and the aeration module is turned off.
[0016] Preferably, the feed inlet of the first switching zone is located at the lower part of the first switching zone, the discharge outlet of the first switching zone is located at the upper part of the first switching zone, and the first switching zone is equipped with a stirring device and an aeration device for switching between anaerobic and aerobic conditions.
[0017] Preferably, the inlet of the anaerobic zone is located at the upper part of the anaerobic zone, the outlet of the anoxic zone is located at the lower part of the anoxic zone, the anoxic zone is connected to the external mud-water separation unit through the outlet, and the first control pipeline is connected to the inlet.
[0018] Preferably, both the anaerobic and anoxic zones are equipped with flow propulsion devices, and the aerobic zone is equipped with an aeration mechanism.
[0019] Preferably, the propulsion device is one of the following: a stirring mechanism, a sewage pump, a screw conveyor, a hydraulic stirring mechanism, a mechanical stirring device, a propulsion device, or a hyperboloid mixer.
[0020] Preferably, flow meters are installed on the first control line, the second control line, and the third control line.
[0021] Meanwhile, this application also provides a wastewater treatment system, including a sludge-water separation unit, a deep treatment unit, a monitoring unit, and a biochemical reaction tank as described above. The anoxic zone is connected to the sludge-water separation unit, the sludge-water separation unit is connected to the deep treatment unit, the deep treatment unit is provided with a drain outlet, and the monitoring unit is used to monitor the biochemical reaction tank.
[0022] Preferably, the mud-water separation unit is one of a horizontal flow sedimentation tank, a radial flow sedimentation tank, a vertical flow sedimentation tank, or a composite sedimentation tank; the deep treatment unit is one of a high-efficiency sedimentation tank, a magnetic coagulation sedimentation tank, a micro-sand sedimentation tank, an air flotation treatment, or a coagulation sedimentation tank.
[0023] Compared with the prior art, the beneficial effects of this application are:
[0024] 1. The return unit of this application is equipped with a third control pipeline for returning sludge from the external sludge-water separation unit to the second switching zone. The third control pipeline is linked with the aeration module and the stirring module in the second switching zone. When the second switching zone switches to an anoxic state, the sludge can be directly returned to the second switching zone. Furthermore, the third control pipeline is connected to the feed inlet of the second switching zone, so that the wastewater can mix with the sludge when it enters the second switching zone in an anoxic state, thereby further enhancing the denitrification effect.
[0025] 2. The wastewater treatment system of this application can achieve higher effluent treatment standards without adding carbon sources and phosphorus removal agents, which can significantly reduce construction investment costs, reduce operating costs, enhance the system's resistance to shock loads, and reduce the difficulty of operation and management. Attached Figure Description
[0026] Figure 1 This is a piping diagram of the wastewater treatment biochemical reaction tank in Example 1;
[0027] Figure 2 This is a piping diagram of the wastewater treatment system in Example 2;
[0028] Figure 3 This is a schematic diagram of the monitoring unit in Example 2;
[0029] The labels for the attached figures are as follows:
[0030] Anaerobic zone 1; First switching zone 2; Aerobic zone 3; Second switching zone 4; Anoxic zone 5; Return flow unit 6; Flow propulsion device 7; Inlet 11; Stirring device 21; Aeration device 22; Aeration module 41; Stirring module 42; Outlet 51; First control pipeline 61; Third control pipeline 62; Second control pipeline 63; Second control valve 621; First control valve 631; Biochemical reaction tank A; Sludge-water separation unit B; Deep treatment unit C; Monitoring unit D; Inlet pipeline D1; Sampling pump D2; Pretreatment device D3; Online monitoring instrument D4; Outlet pipeline D5; Sewage valve D6; Inlet filtration device D31; Sedimenter D32; Clear water zone D33. Detailed Implementation
[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0032] Example 1
[0033] refer to Figure 1 A wastewater treatment biochemical reactor includes an anaerobic zone 1, a first switching zone 2, an aerobic zone 3, a second switching zone 4 and an anoxic zone 5 connected in sequence. The anoxic zone is connected to an external sludge-water separation unit B, and also includes a reflux unit 6.
[0034] The reflux unit is equipped with a first control pipeline 61 for controlling the sludge in the sludge-water separation unit to anaerobic zone 1, a second control pipeline 63 for reflux to anoxic zone 5, and a third control pipeline 62 for reflux to second switching zone 2.
[0035] The third control line 62 is connected to the feed inlet of the second switching zone 4;
[0036] The second switching zone 4 is equipped with an aeration module 41 and a stirring module 42 for switching between aerobic and anoxic conditions.
[0037] When the aeration module 41 is turned on, the stirring module 42 is turned off, the second control pipeline 63 is turned on, and the third control pipeline 62 is turned off; when the stirring module 42 is turned on, the aeration module 41 is turned off, and the third control pipeline 62 is turned on, or both the second control pipeline 63 and the third control pipeline 62 are turned on.
[0038] Under this design, wastewater enters anaerobic zone 1 from inlet 11. In anaerobic zone 1, the main process is to convert COD into an internal carbon source and release phosphorus.
[0039] The first switching zone 2 can adjust the ratio of anaerobic and aerobic in the biological reaction tank. When the first switching zone 2 is switched to the anaerobic state, it is the same as the anaerobic zone 1. When the first switching zone 2 is switched to the aerobic state, it can be understood that the sewage enters the aerobic zone 3 after passing through the anaerobic zone 1. In the aerobic zone 3, the main functions are to degrade free organic matter in the sewage, nitrify, and absorb total phosphorus.
[0040] The second switching zone 4 can adjust the ratio of aerobic and anoxic zones in the biological reaction tank. When the second switching zone 4 switches to the aerobic state, it is the same as the aerobic zone 3. When the second switching zone 4 switches to the anoxic state, it can be understood that the sewage enters the anoxic zone 5 after passing through the aerobic zone 3. In the anoxic zone 5, the main purpose is to make full use of the internal carbon source of microorganisms for denitrification, thereby effectively removing nitrogen pollution from the sewage.
[0041] Specifically, when the aeration module 41 is working, the stirring device 42 is turned off, and the aeration module 41 inputs air into the second switching zone 4, so that the second switching zone 4 is in an aerobic state; when the stirring module 42 is working, the aeration module 41 stops working, and there is no air input into the second switching zone 4, so the second switching zone 4 is in an oxygen-deficient state.
[0042] By linking the third control pipeline 62 of the return unit 6 with the aeration module 41 and the stirring module 42 in the second switching zone 4, when the second switching zone 4 switches to an anoxic state, the sludge can be directly returned to the second switching zone 4, or returned to the second switching zone 4 and the anoxic zone 5. Furthermore, the third control pipeline 62 is connected to the inlet of the second switching zone 4, which can mix with the sludge when the wastewater enters the second switching zone 4 in an anoxic state, further enhancing the denitrification effect.
[0043] Specifically, the reflux unit 6 includes a first reflux pipe, a second reflux pipe, and a third reflux pipe, wherein the first reflux pipe is a first control pipe 61, the second reflux pipe is a second control pipe 63, and the third reflux pipe is a third control pipe 62; furthermore, the first reflux pipe, the second reflux pipe, and the third reflux pipe can be connected to the sludge-water separation unit B respectively, or the second reflux pipe and the third reflux pipe can be connected to the first reflux pipe. Implicitly, a valve is provided on the first control pipe 61.
[0044] Preferably, the feed inlet of the second switching zone 4 is located at the upper part of the second switching zone 4; the feed inlet of the anoxic zone 5 is located at the lower part of the anoxic zone 5, and the second control pipeline 63 is connected to the feed inlet of the anoxic zone 5.
[0045] Specifically, the feed inlet of the second switching zone 4 is located at the top, which helps the sewage to flow in from the top, ensuring the uniformity of sewage flow and improving treatment efficiency.
[0046] Preferably, a first control valve 631 is provided on the second control pipeline 63, and a second control valve 621 is provided on the third control pipeline 62. The first control valve 631, the second control valve 621, the aeration module 41, and the stirring module 42 are linked together.
[0047] When the aeration module 41 is turned on, the first control valve 631 is turned on and the second control valve 621 is turned off.
[0048] When the stirring module 42 is turned on, the first control valve 631 is closed and the second control valve 621 is turned on, or both the first control valve 631 and the second control valve 621 are turned on.
[0049] In practical use, the first control valve 631 is linked with the aeration module 41 and the stirring module 42; the second control valve 621 is also linked with the aeration module 41 and the stirring module 42. That is, when the aeration module 41 is turned on, the stirring module 42 stops, and the second switching zone 4 switches to an aerobic state. At this time, the first control valve 631 opens, and the second control valve 621 closes, allowing sludge to flow back to the aerobic zone 5, enhancing nitrification. When the stirring module 42 is turned on, the aeration module 41 stops, and the second switching zone 4 switches to an anoxic state. At this time, the first control valve 631 closes, and the second control valve 621 opens, or both the first and second control valves 631 open. The sludge is flowed back to the second switching zone 4 individually, or simultaneously to the second switching zone 4 and the anoxic zone 5, increasing denitrification and reducing energy consumption. In this way, the return position can be automatically switched when the second switching zone 4 is in a switching state.
[0050] Preferably, the feed inlet of the first switching zone 2 is located at the lower part of the first switching zone 2, the discharge outlet of the first switching zone 2 is located at the upper part of the first switching zone 2, and the first switching zone 2 is provided with a stirring device 21 and an aeration device 22 for switching between anaerobic and aerobic.
[0051] The first switching zone 2 and the second switching zone 4 operate on the same principle. By switching between the stirring device 21 and the aeration device 22, the first switching zone 2 can switch between anaerobic and aerobic states. The first switching zone 2 adopts a bottom-in, top-out method, which can effectively utilize the tank volume for reaction, prevent short-circuiting, and improve treatment efficiency.
[0052] Furthermore, the inlet 11 of the anaerobic zone 1 is located at the upper part of the anaerobic zone 1, and the outlet 51 of the anoxic zone 5 is located at the lower part of the anoxic zone 5. The anoxic zone 5 is connected to the external mud-water separation unit B through the outlet 51, and the first control pipeline 61 is connected to the inlet 11.
[0053] Specifically, if both the inlet and outlet are located at the top, the sewage will flow more in an overflow manner, resulting in uneven flow. Therefore, the anaerobic zone 1, the first switching zone 2, the aerobic zone 3, the second switching zone 4, and the anoxic zone 5 are all connected in an overall top-in, bottom-out manner to prevent short-circuiting, ensure the uniformity of sewage flow, make full use of the tank capacity for reaction, and improve treatment efficiency.
[0054] Implicitly, each inlet is equipped with a device to prevent backflow and mixing, such as an outlet weir, a short pipe extending into the pool, a flap gate, or other anti-backflow devices, to ensure that the mixed liquor in aerobic zone 3 does not flow into the first switching zone 2 in an anaerobic state, the mixed liquor in the first switching zone 2 in an aerobic state does not flow into the anaerobic zone 1, the mixed liquor in anoxic zone 5 does not flow into the second switching zone 4 in an aerobic state, and the mixed liquor in the second switching zone 4 in anoxic state does not flow into the aerobic zone 3, thus maintaining a good biochemical reaction environment in each zone.
[0055] In this embodiment, both the anaerobic zone 1 and the anoxic zone 5 are equipped with a flow propulsion device 7, and the aerobic zone 2 is equipped with an aeration mechanism 8. The flow propulsion device 7 is one of the following: a stirring mechanism, a sewage pump, a screw conveyor, a hydraulic stirring mechanism, a mechanical stirring device, a flow propeller, or a hyperboloid mixer. This embodiment uses a stirring mechanism, which can prevent excessive deposition of sludge and sediment at the bottom of the tank, helping to maintain the sludge in suspension, ensuring that the activity of microorganisms is not affected by localized sedimentation, and effectively mixing the sewage to ensure a uniform distribution of organic matter and microorganisms in the water. This helps to improve the reaction rate and ensure sufficient contact between microorganisms and the substrate, thereby enhancing the effect of pollutant removal.
[0056] In this embodiment, the stirring module, stirring device, and stirring mechanism are all the same type, which can be a motor plus stirring rod or a hydraulic (jet) stirring and mixing method; the aeration module, aeration device, and aeration mechanism are all the same type, which can be an aeration pipe connected to an external aeration device.
[0057] In this embodiment, flow meters are provided on the first control line 61, the second control line 63, and the third control line 62 to facilitate observation and control of the flow rates of the first control line 61, the second control line 63, and the third control line 62.
[0058] In this embodiment 1, the switching between anaerobic and aerobic in the first switching zone 2 and the switching between aerobic and anoxic in the second switching zone 4 can be adjusted based on actual operating data according to changes in water quality (pollution concentration), water temperature, season, day and night, water volume, and treatment requirements.
[0059] Example 2
[0060] refer to Figures 2-3 A wastewater treatment system includes a sludge-water separation unit B, a deep treatment unit C, a monitoring unit D, and a biochemical reaction tank A as described above. Anoxic zone 5 is connected to sludge-water separation unit B, and sludge-water separation unit B is connected to deep treatment unit C. Deep treatment unit C is provided with a drain outlet, and monitoring unit D is used to monitor biochemical reaction tank A.
[0061] In this design, the water treated in biological reaction tank A enters the sludge-water separation unit B. The sludge from sludge-water separation unit B is returned to anaerobic zone 1 via the first control pipe 61 of the return unit 6. The sludge is then returned to the second switching zone 4 or the anoxic zone 5 via the second control pipe 63 and the third control pipe 62 of the return unit 6. The water treated in sludge-water separation unit B then enters the advanced treatment unit C, where it meets higher effluent standards.
[0062] Furthermore, the mud-water separation unit B can be one of a horizontal flow sedimentation tank, a radial flow sedimentation tank, a vertical flow sedimentation tank, or a composite sedimentation tank; the deep treatment unit C can be one of a high-efficiency sedimentation tank, a magnetic coagulation sedimentation tank, a micro-sand sedimentation tank, an air flotation treatment, or a coagulation sedimentation tank.
[0063] In this way, higher effluent treatment standards can be achieved without adding carbon sources and phosphorus removal agents, which can significantly reduce construction investment costs, reduce operating costs, enhance the system's resistance to shock loads, and reduce the difficulty of operation and management.
[0064] Specifically, monitoring unit D can consist of an inlet pipe D1, a sampling pump D2, a pretreatment device D3, online monitoring instruments D4, an outlet pipe D5, and a drain valve D6. The pretreatment device D3 consists of an inlet filtration device D31, a sedimentation tank D32, and a clear water zone D33. The inlet filtration device D31 can be composed of a simple interception net and other interception devices, aiming to remove larger floating objects, particles, silt, debris, etc., to prevent the probe from being entangled and clogged. The sedimentation tank D32 aims to remove activated sludge from the monitored water to prevent the probe from being clogged and affecting the accuracy of the test. It can be composed of a sedimentation tank, a hydrocyclone separator, a fine screen, or other sludge-water separation devices, mainly relying on natural physical processes. Biological / chemical methods cannot be used to achieve sludge-water separation, otherwise the accuracy of the test will be affected. The clear liquid after sludge-water separation enters the clear water zone D33, which is also the monitoring area of this system. All online instruments sample in this area.
[0065] Furthermore, instruments that can be installed in anaerobic zone 1 include ORP, DO, and total phosphorus; instruments that can be installed in aerobic zone 3 include DO, ammonia nitrogen, nitrate, TP, and TN; and instruments that can be installed in anoxic zone 5 include nitrate, ammonia nitrogen, TP, and TN. One or more instruments can be selected for testing according to actual management needs.
[0066] The detection system D can adjust the aeration rate, sludge return ratio, and usage of return and switchable zones based on influent flow rate, temperature, and online monitoring data of each zone, in order to achieve good treatment results.
[0067] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements or modifications can be made without departing from the principle of this application, and these improvements or modifications should also be considered within the scope of protection of this application.
Claims
1. A wastewater treatment biochemical reactor, comprising an anaerobic zone, a first switching zone, an aerobic zone, a second switching zone, and an anoxic zone connected in sequence, wherein the anoxic zone is connected to an external sludge-water separation unit, characterized in that, It also includes a reflow unit; The reflux unit is equipped with a first control pipeline for controlling the sludge in the sludge-water separation unit to reflux to the anaerobic zone, a second control pipeline for reflux to the anoxic zone, and a third control pipeline for reflux to the second switching zone; The third control pipeline is connected to the feed inlet of the second switching zone; The second switching zone is equipped with an aeration module and a stirring module for switching between aerobic and anoxic conditions; When the aeration module is turned on, the stirring module is turned off, the second control pipeline is turned on, and the third control pipeline is turned off; when the stirring module is turned on, the aeration module is turned off, and the third control pipeline is turned on, or both the second and third control pipelines are turned on.
2. The wastewater treatment biochemical reaction tank according to claim 1, characterized in that, The feed inlet of the second switching zone is located at the upper part of the second switching zone; the feed inlet of the anoxic zone is located at the lower part of the anoxic zone, and the second control pipeline is connected to the feed inlet of the anoxic zone.
3. The wastewater treatment biochemical reaction tank according to claim 1, characterized in that, The second control pipeline is equipped with a first control valve, and the third control pipeline is equipped with a second control valve. The first control valve, the second control valve, the aeration module, and the stirring module are linked together. When the aeration module is turned on, the first control valve is turned on, the second control valve is turned off, and the stirring module is turned off. When the stirring module is turned on, the first control valve is closed and the second control valve is turned on, or both the first control valve and the second control valve are turned on and the aeration module is turned off.
4. The wastewater treatment biochemical reaction tank according to claim 1, characterized in that, The feed inlet of the first switching zone is located at the lower part of the first switching zone, and the discharge outlet of the first switching zone is located at the upper part of the first switching zone. The first switching zone is equipped with a stirring device and an aeration device for switching between anaerobic and aerobic conditions.
5. The wastewater treatment biochemical reaction tank according to claim 1, characterized in that, The inlets of the anaerobic zone are all located at the top of the anaerobic zone, and the outlets of the anoxic zone are located at the bottom of the anoxic zone. The anoxic zone is connected to an external mud-water separation unit through the outlet, and the first control pipeline is connected to the inlet.
6. The wastewater treatment biochemical reaction tank according to claim 1, characterized in that, Both the anaerobic and anoxic zones are equipped with flow propulsion devices, and the aerobic zone is equipped with an aeration mechanism.
7. The wastewater treatment biochemical reaction tank according to claim 6, characterized in that, The propulsion device is one of a stirring mechanism, a sewage pump, or a screw conveyor.
8. The wastewater treatment biochemical reaction tank according to claim 1, characterized in that, Flow meters are installed on the first control pipeline, the second control pipeline and the third control pipeline.
9. A wastewater treatment system, characterized in that, It includes a mud-water separation unit, a deep treatment unit, a monitoring unit, and a biochemical reaction tank as described in any one of claims 1 to 8. The anoxic zone is connected to the mud-water separation unit, the mud-water separation unit is connected to the deep treatment unit, the deep treatment unit is provided with a drain outlet, and the monitoring unit is used to monitor the biochemical reaction tank.
10. The wastewater treatment system according to claim 9, characterized in that, The mud-water separation unit is one of a horizontal flow sedimentation tank, a radial flow sedimentation tank, a vertical flow sedimentation tank, or a composite sedimentation tank; the deep treatment unit is one of a high-efficiency sedimentation tank, a magnetic coagulation sedimentation tank, a micro-sand sedimentation tank, an air flotation treatment, or a coagulation sedimentation tank.