Mobile wastewater biochemical treatment device and working method thereof

Abstract

The invention discloses a mobile wastewater biochemical treatment device and a working method thereof. The mobile wastewater biochemical treatment device comprises a container as well as an adjusting buffer tank, a biochemical system tank, a biochemical sedimentation tank and a biochemical water outlet tank which are arranged in the container, the biochemical system pool comprises an anoxic pool, a first aerobic pool and a second aerobic pool; a stirrer is arranged in the anoxic tank, a dosing device is arranged in the first aerobic tank, a pH meter, a heating rod and a dissolved oxygen meter are arranged in the second aerobic tank, and a water outlet of the second aerobic tank is connected with a biochemical sedimentation tank; the biochemical sedimentation tank comprises a central cylinder and a flow baffle arranged around the central cylinder, and is used for separating wastewater and sludge when effluent of the biochemical system tank flows downwards through the central cylinder, and the separated water enters the biochemical effluent tank through an overflow weir at the top of the biochemical sedimentation tank, so that effective wastewater biochemical treatment is realized, the installation is convenient, the maintenance is simple, and the adaptability is strong.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a mobile wastewater biochemical treatment device and a working method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Industrial wastewater often contains refractory pollutants with poor biodegradability, making it difficult to effectively treat them using a single wastewater treatment process. Once pollutants in the wastewater have been significantly removed, refractory substances have been broken down and converted into small organic molecules, improving biodegradability. Biochemical processes can then be used to further remove organic pollutants by utilizing the biotransformation process of microorganisms.

[0004] Most existing mobile sewage treatment equipment is designed for domestic sewage treatment, where water composition is relatively stable and the treatment process is relatively simple. However, the treatment of high-concentration organic wastewater is often complex due to its stability, resistance to degradation, and high concentration. Fixed equipment is often used for this purpose, making it difficult to move and adapt to different site needs. The complex structure and inconvenient operation of the existing technology also require civil engineering work, resulting in a long construction period. Summary of the Invention

[0005] In order to solve the above problems, the present invention proposes a mobile wastewater biochemical treatment device and its working method, which directly removes pollutants in wastewater, significantly reduces wastewater technical indicators, and realizes effective wastewater biochemical treatment. At the same time, it adopts a mobile container design, which is easy to install, simple to maintain and has strong adaptability.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a mobile wastewater biochemical treatment device, comprising: a container and a regulating buffer tank, a biochemical system tank, a biochemical sedimentation tank, and a biochemical effluent tank arranged in the container;

[0008] The water outlet of the regulating buffer tank is connected to the biochemical system pool;

[0009] The biochemical system pool includes an anoxic pool, a first aerobic pool, and a second aerobic pool; the anoxic pool is provided with a stirrer, and the stirred wastewater in the anoxic pool overflows into the first aerobic pool; the first aerobic pool is provided with a dosing device, the outlet of the first aerobic pool is connected to the second aerobic pool, the second aerobic pool is provided with a pH meter, a heating rod, and a dissolved oxygen meter, and the outlet of the second aerobic pool is connected to the biochemical sedimentation tank;

[0010] The biochemical sedimentation tank includes a central tube and a baffle arranged around the central tube, which is used to separate wastewater and sludge when the effluent from the biochemical system pool flows downward through the central tube. The separated water enters the biochemical effluent tank through the overflow weir at the top of the biochemical sedimentation tank.

[0011] As an optional implementation method, after the incoming water enters the container from the water inlet, it is input into the regulating buffer tank through the biochemical raw water pump, and then enters the biochemical system tank from the regulating buffer tank through the biochemical lifting pump.

[0012] As an optional implementation, the regulating buffer tank is provided with a level meter for monitoring the influent liquid level and a pH meter for monitoring the influent pH.

[0013] As an optional implementation, the biochemical system pool is divided into two groups of biochemical system pools with the same structure and symmetrical arrangement, and only one of the two groups is in operation or both groups are fed with water at the same time.

[0014] As an optional embodiment, the dosing device includes a glucose dosing device, a uric acid dosing device and a phosphate dosing device;

[0015] An OPR meter for monitoring the ORP in the water is provided in the anoxic tank;

[0016] A digestate reflux pipe is provided at the bottom of the second aerobic tank, and the digestate is refluxed to the anoxic tank via a biochemical reflux pump for denitrification of the digestate.

[0017] As an optional implementation method, the effluent from the biochemical system pool first enters the central tube and then flows downward, and then is evenly distributed to the surroundings through the baffle plate, and the sewage and sludge are separated during the upward movement.

[0018] As an optional implementation method, the sludge is settled in the mud hopper and returned to the anoxic tank through a biochemical mud pump, or discharged through the mud outlet of the container.

[0019] As an optional implementation, the water in the biochemical effluent pool is discharged from the container to the next process section via a biochemical effluent pump.

[0020] As an optional implementation, liquid level gauges for monitoring liquid levels are provided in both the biochemical sedimentation tank and the biochemical effluent tank.

[0021] In a second aspect, the present invention provides a method for operating the mobile wastewater biochemical treatment device according to the first aspect, comprising:

[0022] The influent is pumped into the regulating buffer tank via the biochemical raw water pump, and then enters the anoxic tank via the biochemical lift pump 5 from the regulating buffer tank;

[0023] The sewage and sludge are mixed by a submerged mixer in the anoxic tank. The sewage overflows from the anoxic tank and enters the first aerobic tank. The first aerobic tank is equipped with a glucose dosing device, a uric acid dosing device and a phosphate dosing device to add glucose, uric acid and phosphate respectively.

[0024] The sewage enters the second aerobic tank through the outlet of the first aerobic tank. The pH in the second aerobic tank is monitored by a pH meter, dissolved oxygen is measured by a dissolved oxygen meter, and the sewage is heated by a heating rod.

[0025] The effluent from the biochemical system pool enters the biochemical sedimentation tank. A central tube and a baffle are set in the middle of the biochemical sedimentation tank. The effluent from the biochemical system pool first enters the central tube and flows downward, and then is evenly distributed to the surrounding areas through the baffle. The sewage and sludge are separated during the upward movement, and the separated water enters the biochemical effluent tank through the overflow weir at the top of the biochemical sedimentation tank.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention proposes a mobile wastewater biochemical treatment device and a working method thereof, which adopts a mobile container design, and is designed with a regulating buffer tank, a biochemical system tank, a biochemical sedimentation tank and a biochemical effluent tank in the container. The biochemical system tank adopts AOO technology, including an anoxic tank, a first aerobic tank and a second aerobic tank; the anoxic tank is provided with a stirrer, and the stirred wastewater in the anoxic tank overflows into the first aerobic tank; the first aerobic tank is provided with a dosing device, the outlet of the first aerobic tank is connected to the second aerobic tank, the second aerobic tank is provided with a pH meter, a heating rod and a dissolved oxygen meter, and the second aerobic tank is provided with a pH meter, a heating rod and a dissolved oxygen meter. The outlet of the two aerobic tanks is connected to the biochemical sedimentation tank, which can directly remove pollutants in the wastewater, significantly reduce the technical indicators of the wastewater, reach or approach the requirements of the wastewater discharge standard, and realize effective biochemical treatment of the wastewater; the speed of the water inlet and outlet can also be controlled by setting the water inlet and water outlet electric control valves to realize precise control of the wastewater treatment; at the same time, the mobile container design is easy to install, simple to maintain, with a short debugging cycle, small footprint, flexible mobility, strong adaptability, and high resource recovery efficiency, which solves the technical problems of incomplete wastewater treatment and low resource recovery rate.

[0028] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0030] Figure 1 This is an overall schematic diagram of a mobile wastewater biochemical treatment device provided in Example 1 of the present invention;

[0031] Figure 2 The structure of the mobile wastewater biochemical treatment device provided in Example 1 of the present invention Figure 1 ;

[0032] Figure 3 The structure of the mobile wastewater biochemical treatment device provided in Example 1 of the present invention Figure 2 ;

[0033] Among them, 1. regulating buffer tank, 2. biochemical raw water pump, 3. first liquid level gauge, 4. first pH meter, 5. biochemical lifting pump, 6. anoxic tank, 7. submersible mixer, 8. OPR meter, 9. first aerobic tank, 10. glucose dosing device, 11. uric acid dosing device, 12. phosphate dosing device, 13. second aerobic tank, 14. second pH meter, 15. dissolved oxygen meter, 16. heating rod, 17. thermometer, 18. biochemical sedimentation tank, 19. second liquid level gauge, 20. biochemical sludge pump, 21. biochemical outlet tank, 22. third liquid level gauge, 23. biochemical outlet pump, 24. air pump. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that the terms "include" and "comprise" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] In the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0038] Example 1

[0039] like Figure 1-Figure 3 As shown, this embodiment provides a mobile wastewater biochemical treatment device, including: a container and a regulating buffer tank, a biochemical system tank, a biochemical sedimentation tank and a biochemical effluent tank arranged in the container;

[0040] The water outlet of the regulating buffer tank is connected to the biochemical system pool;

[0041] The biochemical system pool includes an anoxic pool, a first aerobic pool, and a second aerobic pool; the anoxic pool is provided with a stirrer, and the stirred wastewater in the anoxic pool overflows into the first aerobic pool; the first aerobic pool is provided with a dosing device, the outlet of the first aerobic pool is connected to the second aerobic pool, the second aerobic pool is provided with a pH meter, a heating rod, and a dissolved oxygen meter, and the outlet of the second aerobic pool is connected to the biochemical sedimentation tank;

[0042] The biochemical sedimentation tank includes a central tube and a baffle arranged around the central tube, which is used to separate wastewater and sludge when the effluent from the biochemical system pool flows downward through the central tube. The separated water enters the biochemical effluent tank through the overflow weir at the top of the biochemical sedimentation tank.

[0043] In this embodiment, after the incoming water enters the container from the water inlet, it is pressurized and input into the regulating buffer tank 1 through the biochemical raw water pump 2, which is also the water inlet pump; after the incoming water from the regulating buffer tank 1 is regulated by the internal baffle, it is lifted into the biochemical system pool through the biochemical lifting pump 5, which is also the drainage pump.

[0044] As an optional embodiment, a first liquid level meter 3 and a first pH meter 4 are provided inside the regulating buffer tank 1 . The first liquid level meter 3 is used to monitor the inlet water level, and the first pH meter 4 is used to monitor the inlet water pH.

[0045] As an optional implementation, if the incoming water is pressurized, it can bypass the biochemical raw water pump 2 and directly enter the regulating buffer tank 1.

[0046] In this embodiment, the biochemical system pool adopts the AOO process, that is, it includes an anoxic pool 6, a first aerobic pool 9 and a second aerobic pool 13;

[0047] The effluent from the regulating buffer tank 1 first enters the anoxic tank 6, which is equipped with a submerged mixer 7 for fully mixing the sewage and sludge, and an OPR meter 8 (Oxidation-Reduction Potential Meter) for monitoring the ORP in the water;

[0048] After passing through the anoxic tank 6, the sewage overflows into the first aerobic tank 9. The first aerobic tank 9 is equipped with three dosing devices, namely a glucose dosing device 10, a uric acid dosing device 11 and a phosphate dosing device 12. Each device adds glucose, uric acid and phosphate respectively through its own dosing port.

[0049] The sewage enters the second aerobic tank 13 through the opening at the bottom of the first aerobic tank 9. The second aerobic tank 13 is equipped with a second pH meter 14 and a dissolved oxygen meter 15 for monitoring pH and dissolved oxygen respectively. At the same time, the second aerobic tank 13 is equipped with a heating rod 16. When the water temperature is too low to affect the biochemical effect, the heating rod 16 is controlled by a thermometer 17 to heat the sewage.

[0050] As an optional embodiment, a digestate reflux pipe is provided at the bottom of the second aerobic tank 13, and the digestate is refluxed to the anoxic tank 6 via a biochemical reflux pump for digestate reflux denitrification.

[0051] As an optional embodiment, elastic fillers are hung inside the first aerobic tank 9 and the second aerobic tank 13, and aeration plates are provided at the bottom.

[0052] As an optional implementation, the first aerobic tank 9 and the second aerobic tank 13 adopt a partition design to achieve regulation of different water inflows.

[0053] In this embodiment, the biochemical system pool is divided into two groups of biochemical system pools with the same structure and symmetrical arrangement. Only one of the two groups can be operated, or both groups can be fed with water at the same time and switched by a manual valve.

[0054] In this embodiment, depending on the water quality, a glucose dosing device 10, a uric acid dosing device 11, and a phosphate dosing device 12 provide a carbon source, a nitrogen source, and phosphate to the biochemical system. Each dosing device is equipped with an electromagnetic diaphragm metering pump and a mixer, and manual dosing is used. The container is equipped with a tap water inlet connected to an external tap water pipeline to supply water to the dosing system and provide cooling water to the sludge pump.

[0055] In this embodiment, the effluent from the biochemical system pool enters the biochemical sedimentation tank 18. A central tube and a baffle are provided in the middle of the biochemical sedimentation tank 18. The water first enters the central tube and flows downward, then is evenly distributed to the surrounding areas through the baffle. The sewage and biochemical sludge are separated during the upward movement.

[0056] The separated clean water is collected and discharged to the biochemical effluent pool 21 through the overflow weir at the top; the sludge settles to the mud hopper, and the sludge in the mud hopper is returned to the anoxic pool 6 in the biochemical system pool through the biochemical mud discharge pump 20, or is regularly discharged from the container through the container mud discharge port.

[0057] As an optional implementation, a second liquid level meter 19 is provided in the biochemical sedimentation tank 18 for liquid level monitoring.

[0058] As an optional implementation method, a flushing water pipe is provided at the upper end of the mud bucket for regular flushing.

[0059] In this embodiment, the biochemical effluent flows by gravity into the biochemical effluent pool 21. A third liquid level gauge is provided in the biochemical effluent pool 21 to monitor the liquid level. The effluent is lifted and discharged from the container to the next process section by the biochemical effluent pump 23, which is also the drainage pump.

[0060] As an optional embodiment, a bypass is provided on the drainage pipeline to connect to a flushing water pipe at the bottom of the biochemical sedimentation tank 18, and the mud bucket is manually flushed regularly.

[0061] As an optional embodiment, an air pump 24 is further provided in the container for supplying air to the biochemical pool.

[0062] As an optional implementation method, all water tanks are equipped with overflow drain pipes, and all overflow drain pipes are collected and discharged into the container through the overflow drain main port.

[0063] In this embodiment, the interlocking control requirements of the above device are as follows:

[0064] The first liquid level gauge 3 is interlocked with the biochemical raw water pump 2 via an electric valve. Close the drain valve, shut down the biochemical lift pump 5, and adjust the water volume in the buffer tank to increase the water level above the high alarm level. Check whether the alarm is activated, whether the liquid level interlock is functioning properly, and whether the biochemical raw water pump 2 and the inlet valve are closed. Open the drain valve and start the biochemical lift pump 5. When the liquid level falls below the medium level, check whether the liquid level interlock is functioning properly and whether the biochemical raw water pump 2 is turned on.

[0065] The first liquid level meter 3 is interlocked with the biochemical lift pump 5. When the liquid level is lower than the low liquid level, the liquid level interlock works normally, the biochemical lift pump 5 is shut down, and the low liquid level is not lower than the probe position of the first pH meter.

[0066] The third liquid level gauge 3 is interlocked with the biochemical lift pump 5 and the biochemical outlet pump 23. When the water level in the intermediate tank exceeds the high alarm level, the system checks whether an alarm has been triggered, whether the liquid level interlock is functioning properly, and whether the biochemical lift pump 5 is shut down. The system then opens the drain valve. When the water level falls below the middle level, the system checks whether the liquid level interlock is functioning properly and whether the biochemical lift pump 5 is turned on. When the water level falls below the low level, the system checks whether the liquid level interlock is functioning properly and whether the biochemical outlet pump 23 is shut down. When the water level rises above the high level, the system checks whether the biochemical outlet pump 23 is turned on.

[0067] The biochemical sludge pump 20 is interlocked with the second liquid level 19. When the liquid level is lower than the low liquid level, the biochemical sludge pump 20 is turned off.

[0068] The second liquid level 19 is interlocked with the heating rod 16. When the heating rod 16 is started for the first time, the heating rod 16 has the starting condition only when the second liquid level 19 is higher than the low liquid level.

[0069] The heating rod 16 is interlocked with the thermometer 17, and upper and lower temperature limits (adjustable) are set. It starts when the temperature is lower than the lower limit and stops when the temperature is higher than the upper limit.

[0070] All water pumps are equipped with pressure switches. When the pressure is higher than the set pressure, the water pump will be shut down. Test the water pumps one by one, close the pump outlet manual valve, and see if the water pump will be shut down when the pressure reaches the set value.

[0071] The air pump 24, submersible agitator 7, and heating rod 16 are interlocked with the automatic operation of the equipment. Turn the equipment to the automatic button, switch to the biochemical system pool, press the start button, and observe whether the fan is started and whether the submersible agitator 7 and heating rod 16 are running.

[0072] Interlock the dosing pump with the water inlet pump, start the water inlet pump and see if the dosing pump starts. Turn off the water inlet pump and see if the dosing pump stops.

[0073] In this embodiment, the above-mentioned mobile wastewater biochemical treatment device is used to treat wastewater, and the biochemical process of microorganisms is used to biodegrade and transform the organic pollutants in the wastewater. 2 / O method, SBR method, oxidation ditch method and contact oxidation method. In order to ensure the removal effect of different pollutants and realize continuous water inlet and outlet operation, the biochemical device adopts AO treatment process, which can realize different biochemical reaction conditions of anoxic and aerobic, and maximize the effect of the biochemical system.

[0074] The process flow is as follows: wastewater enters the regulating buffer tank and is pressurized by a pump. It then passes through the anoxic tank, aerobic tank, and biochemical sedimentation tank, undergoing biochemical treatment via activated sludge. The anoxic tank is equipped with a submersible agitator to maintain internal water flow and prevent sludge deposition. The aerobic tank is equipped with an aeration system, which uses an air pump to maintain dissolved oxygen concentration within the aerobic tank. The aerobic and anoxic tanks can be individually temperature-controlled at 25-32°C via heating rods. The mud-water mixture in the aerobic tank is returned to the anoxic tank via a sludge pump at the bottom end, achieving internal recirculation. The aerobic tank mud-water mixture overflows into the biochemical sedimentation tank, where solid-liquid separation is achieved through gravity settling. The supernatant is discharged, and the bottom sludge is returned to the anoxic and aerobic tanks via a sludge return pump, simultaneously achieving waste sludge discharge. A dosing device is installed to replenish carbon sources and other nutrients to the biochemical system, ensuring the treatment effect of the biochemical system.

[0075] Example 2

[0076] This embodiment provides a method for operating the mobile wastewater biochemical treatment device described in Embodiment 1, characterized by comprising:

[0077] The influent is pumped into the regulating buffer tank via the biochemical raw water pump, and then enters the anoxic tank via the biochemical lift pump 5 from the regulating buffer tank;

[0078] The sewage and sludge are mixed by a submerged mixer in the anoxic tank. The sewage overflows from the anoxic tank and enters the first aerobic tank. The first aerobic tank is equipped with a glucose dosing device, a uric acid dosing device and a phosphate dosing device to add glucose, uric acid and phosphate respectively.

[0079] The sewage enters the second aerobic tank through the outlet of the first aerobic tank. The pH in the second aerobic tank is monitored by a pH meter, dissolved oxygen is measured by a dissolved oxygen meter, and the sewage is heated by a heating rod.

[0080] The effluent from the biochemical system pool enters the biochemical sedimentation tank. A central tube and a baffle are set in the middle of the biochemical sedimentation tank. The effluent from the biochemical system pool first enters the central tube and flows downward, and then is evenly distributed to the surrounding areas through the baffle. The sewage and sludge are separated during the upward movement, and the separated water enters the biochemical effluent tank through the overflow weir at the top of the biochemical sedimentation tank.

[0081] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A mobile wastewater biochemical treatment device, characterized in that: include: Containers and the regulating buffer tank, biochemical system tank, biochemical sedimentation tank and biochemical effluent tank located in the containers; The water outlet of the regulating buffer tank is connected to the biochemical system pool; The biochemical system pool includes an anoxic pool, a first aerobic pool, and a second aerobic pool; the anoxic pool is provided with a stirrer, and the stirred wastewater in the anoxic pool overflows into the first aerobic pool; the first aerobic pool is provided with a dosing device, the outlet of the first aerobic pool is connected to the second aerobic pool, the second aerobic pool is provided with a pH meter, a heating rod, and a dissolved oxygen meter, and the outlet of the second aerobic pool is connected to the biochemical sedimentation tank; The biochemical sedimentation tank includes a central tube and a baffle arranged around the central tube, which is used to separate wastewater and sludge when the effluent from the biochemical system pool flows downward through the central tube. The separated water enters the biochemical effluent tank through the overflow weir at the top of the biochemical sedimentation tank.

2. A mobile wastewater biochemical treatment device according to claim 1, characterized in that: After the incoming water enters the container from the water inlet, it is input into the regulating buffer tank through the biochemical raw water pump, and then enters the biochemical system pool from the regulating buffer tank through the biochemical lifting pump.

3. The mobile wastewater biochemical treatment device according to claim 1, characterized in that: The regulating buffer tank is equipped with a level gauge for monitoring the inlet water level and a pH meter for monitoring the inlet water pH.

4. The mobile wastewater biochemical treatment device according to claim 1, characterized in that: The biochemical system pool is divided into two groups of biochemical system pools with the same structure and symmetrical arrangement. Only one of the two groups is in operation or water is introduced into both groups at the same time.

5. The mobile wastewater biochemical treatment device according to claim 1, characterized in that: The dosing device includes a glucose dosing device, a uric acid dosing device and a phosphate dosing device; An OPR meter for monitoring the ORP in the water is provided in the anoxic tank; A digestate reflux pipe is provided at the bottom of the second aerobic tank, and the digestate is refluxed to the anoxic tank via a biochemical reflux pump for denitrification of the digestate.

6. The mobile wastewater biochemical treatment device according to claim 1, characterized in that: The effluent from the biochemical system pool first enters the central tube and then flows downwards, and then is evenly distributed to the surrounding areas through the baffle plate. The sewage and sludge are separated during the upward movement.

7. The mobile wastewater biochemical treatment device according to claim 6, characterized in that: The sludge settles in the mud hopper and flows back to the anoxic tank through the biochemical mud discharge pump, or is discharged through the mud discharge port of the container.

8. The mobile wastewater biochemical treatment device according to claim 1, characterized in that: The water in the biochemical effluent pool is discharged from the container to the next process section through the biochemical effluent pump.

9. The mobile wastewater biochemical treatment device according to claim 1, characterized in that: Liquid level gauges for monitoring liquid levels are installed in both the biochemical sedimentation tank and the biochemical effluent tank.

10. An operating method of a mobile wastewater biochemical treatment device according to any one of claims 1 to 9, characterized in that: include: The influent is pumped into the regulating buffer tank via the biochemical raw water pump, and then enters the anoxic tank via the biochemical lift pump 5 from the regulating buffer tank; The sewage and sludge are mixed by a submerged mixer in the anoxic tank. The sewage overflows from the anoxic tank and enters the first aerobic tank. The first aerobic tank is equipped with a glucose dosing device, a uric acid dosing device and a phosphate dosing device to add glucose, uric acid and phosphate respectively. The sewage enters the second aerobic tank through the outlet of the first aerobic tank. The pH in the second aerobic tank is monitored by a pH meter, dissolved oxygen is measured by a dissolved oxygen meter, and the sewage is heated by a heating rod. The effluent from the biochemical system pool enters the biochemical sedimentation tank. A central tube and a baffle are set in the middle of the biochemical sedimentation tank. The effluent from the biochemical system pool first enters the central tube and flows downward, and then is evenly distributed to the surrounding areas through the baffle. The sewage and sludge are separated during the upward movement, and the separated water enters the biochemical effluent tank through the overflow weir at the top of the biochemical sedimentation tank.

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