An SBBR sewage treatment device with high efficiency denitrification

Abstract

The present invention discloses a highly efficient denitrification SBBR sewage treatment device, belonging to the field of sewage treatment technology. It solves the problem that sewage in existing SBBR reaction tanks cannot circulate to generate endogenous denitrification reactions. The device comprises an SBBR reaction tank connected to a sewage assembly. The SBBR reaction tank comprises a reaction tank body, a baffle provided in the middle of the reaction tank body, and a plurality of biological filler racks evenly distributed on both sides of the baffle installed in the reaction tank body. Each biological filler rack is provided with an aeration disk at the bottom, and an air stripping assembly is installed on the side of the baffle near the reaction tank body. The present invention utilizes a portion of the air volume of the aeration fan, without increasing energy consumption or adding a carbon source, and utilizes the air stripping assembly and baffle to fully contact pollutants in the water with microorganisms attached to the biological filler racks. This device utilizes endogenous denitrification to efficiently remove nitrogen, thereby ensuring that the total nitrogen content of the effluent meets the standard by stably adding no or only a small amount of carbon source.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an SBBR sewage treatment device with high-efficiency denitrification. Background Art

[0002] SBBR is the abbreviation of Sequencing Biofilm Batch Reactor, also known as membrane SBR (BABR). It is a new sewage biological treatment process that is being researched and applied at home and abroad. SBBR sewage treatment process: SBBR is a new type of composite biofilm reactor developed by filling the SBR reactor with different fillers (such as fiber fillers, activated carbon, ceramsite, etc.). The introduction of fillers provides a more favorable living environment for microorganisms. Vertically, microorganisms form a complex ecosystem composed of multiple trophic levels such as bacteria, fungi, algae, protozoa, and metazoans. Horizontally, along the direction of water flow to the carrier, a suspended aerobic, attached aerobic, attached facultative anoxic, and attached anaerobic microbial system with various activity capabilities, respiration types, and nutritional types is formed, thereby greatly improving the treatment capacity and stability of the reactor.

[0003] Rural wastewater treatment requires effluent quality to meet Class A standards, with high requirements for total nitrogen. These conditions place even higher demands on the denitrification of the SBBR reactor. To address these high denitrification requirements in rural wastewater treatment, existing SBBR processes increase the biochemical treatment time and hydraulic retention time, while also requiring additional carbon sources and resulting in high denitrification costs.

[0004] Existing SBBR reactors often use vertical agitators to circulate wastewater and ensure horizontal contact between the wastewater and the biofiller racks. However, vertical agitators consume a lot of energy and only allow wastewater to flow in a vortex. This prevents wastewater from circulating in the SBBR reactor and from fully engaging with the biofiller racks both horizontally and vertically. Consequently, the biofiller's activity cannot be fully utilized for endogenous denitrification, reducing denitrification effectiveness. Summary of the Invention

[0005] In view of the above problems in the prior art, the present invention provides an SBBR sewage treatment device with high efficiency in denitrification, which solves the problem that sewage in the existing SBBR reaction tank cannot circulate to cause endogenous denitrification reaction.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] Provided is an SBBR sewage treatment device with high-efficiency denitrification, comprising an SBBR reaction tank connected to a sewage component; the SBBR reaction tank comprises a reaction tank body, a partition is provided in the middle of the reaction tank body, one side of the partition is mounted on the side wall of the reaction tank body, and the other side of the partition is spaced a certain distance from the opposite side wall of the reaction tank body; a plurality of biological filler racks are arranged in the reaction tank body and are evenly distributed on both sides of the partition, and an aeration disk is provided at the bottom of each biological filler rack, an air stripping assembly is installed on the side of the partition close to the reaction tank body, and the air stripping assembly and the plurality of aeration disks are all connected to an aeration fan.

[0008] In this solution, the air lift component uses the wind force of the aeration fan to lift the sewage in the reaction tank body, so that the sewage in the reaction tank flows longitudinally, and the sewage flows horizontally and circumferentially in the reaction tank body through the partition. The longitudinal flow and circumferential flow of the sewage form a circulating flow of sewage. The circulating flow of sewage can make the pollutants therein fully contact with the microorganisms attached to the biological filler rack, fully utilize the activity of the denitrifying bacteria on the biological filler, and thus utilize endogenous denitrification to improve the denitrification effect, so that the total nitrogen in the effluent can be stably met the standard without adding or only adding a small amount of carbon source.

[0009] Furthermore, the air lift assembly includes a lifting pipe fixed on the partition, one end of the lifting pipe is placed on one side of the partition, and the other end of the lifting pipe is connected to a first pneumatic shell located on the other side of the partition; the first pneumatic shell is provided with an air inlet pipe connected to the aeration fan, and a Tesla tube is fixed in the first pneumatic shell, one end of the Tesla tube passes through the end surface of the first pneumatic shell and is connected to the lifting pipe, and the other end of the Tesla tube is connected to a connecting pipe, a second pneumatic shell is mounted on the connecting pipe, and two air vents are symmetrically opened on the connecting pipe near the bottom of the second pneumatic shell.

[0010] In this solution, the first pneumatic shell, the second pneumatic shell and the vent holes on the connecting pipe can generate pulsed large bubbles in the Tesla tube. Due to the unidirectional flow characteristics of the Tesla tube, the sewage rises steadily and quickly in the lifting pipe under the action of the pressure difference. Compared with the traditional air lift device, the pulsed large bubbles can increase the lifting force of the sewage and the sewage lifting rate is higher.

[0011] Furthermore, the lifting pipe has an inverted L-shaped structure, one end of the lifting pipe passes over the partition and bends to extend into the reaction tank body, and a plug is installed in the vertical pipe at the other end of the lifting pipe, and a plug is provided on the plug for sealing therewith, and the plug and the plug are connected by a connecting line; by using the plug and the plug, when the sewage level in the reaction tank body is lower than the first air pressure shell, since there is no sewage in the lifting pipe, the plug loses buoyancy and will fall to block the plug, thereby closing the lifting pipe, so that the aeration fan can automatically shut off the wind force entering the lifting pipe.

[0012] Furthermore, the first pneumatic shell includes a hollow cylinder with through holes at both ends of the hollow cylinder. The through hole at the upper end of the hollow cylinder is connected to the Tesla tube, and baffles are installed at each through hole at the lower end of the hollow cylinder. By utilizing the unidirectional conduction characteristic of the Tesla tube, the sewage can be prevented from flowing back during the pulse bubble lifting process, thereby stabilizing the sewage lifting process. Through the baffle, when the sewage liquid level in the reaction tank body is lower than the first pneumatic shell, the baffle loses buoyancy and thus seals the first pneumatic shell, and cooperates with the blocking ball to enable the aeration fan to automatically shut off the wind force entering the lifting pipe.

[0013] Furthermore, the second pneumatic shell has a hollow frustum structure with the large diameter end facing upward. The second pneumatic shell is located inside the first pneumatic shell, and the second pneumatic shell is fixed to the connecting pipe through the sleeve hole in the middle of its bottom surface; the second pneumatic shell adopts the setting of a hollow frustum to form an inner air cavity, which is pneumatically matched with the outer air cavity formed by the first pneumatic shell.

[0014] Furthermore, the multiple aeration plates are connected in sequence through air pipes, and one of the multiple aeration plates is connected to an aeration fan. The use of aeration plates facilitates the aeration fan to transport oxygen to the biological filler rack, thereby forming an aerobic environment.

[0015] Furthermore, the sewage component includes a regulating tank, in which a sewage pump is installed, and the sewage pump is connected to the water inlet at the bottom of the reaction tank body through a water pipe; by setting the water inlet at the bottom of the reaction tank body, when the sewage pump transports sewage to the reaction tank body, the sewage is prevented from directly impacting the biological filler frame under the drive of the sewage pump.

[0016] The present invention discloses an SBBR sewage treatment device with high efficiency denitrification, which has the following beneficial effects:

[0017] The present invention divides the SBBR reaction tank into two parts and reuses part of the air volume of the aeration fan and the air stripping device. Without adding a reflux pump, the water at the end of the SBBR reaction tank is returned to the front part, thereby increasing the fluidity of the sewage in the reaction tank and allowing pollutants in the water to fully contact with the denitrifying microorganisms attached to the biological filler rack, so that the denitrifying bacteria can efficiently remove nitrogen by utilizing the endogenous denitrification reaction. Therefore, there is no need to add a carbon source to the SBBR reaction tank, or only a small amount of carbon source needs to be added to ensure that the total nitrogen in the effluent meets the standard, thereby reducing the denitrification cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the SBBR wastewater treatment plant with high efficiency denitrification;

[0019] Figure 2 Schematic diagram of the front view of the SBBR reaction tank;

[0020] Figure 3 Schematic diagram of the side view of the SBBR reaction tank;

[0021] Figure 4 Schematic diagram of the structure of the gas stripping component;

[0022] Figure 5 is a schematic structural diagram of the first air pressure housing;

[0023] Figure 6 Schematic diagram of the structure of the riser;

[0024] Among them: 1. SBBR reaction tank; 2. sewage component; 3. aeration fan; 4. air lift component; 5. bubbles; 11. reaction tank body; 12. biological filler rack; 13. aeration plate; 14. partition; 15. water inlet; 41. first air pressure shell; 42. second air pressure shell; 43. connecting pipe; 44. Tesla tube; 45. lifting pipe; 46. air inlet pipe; 411. baffle; 421. vent; 451. blocking ball; 452. blocking mouth. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0026] Example 1

[0027] This embodiment provides an SBBR sewage treatment device with high efficiency in denitrification, the purpose of which is to solve the problem that sewage in the existing SBBR reaction tank cannot circulate to produce endogenous denitrification reaction, which will be demonstrated in detail below.

[0028] refer to Figure 1 The present embodiment provides an efficient denitrification SBBR sewage treatment device, comprising an SBBR reaction tank 1, a sewage component 2, an aeration fan 3 and an air stripping component 4.

[0029] The SBBR reaction tank 1 is connected to the sewage component 2 for performing endogenous denitrification reaction to remove nitrogen.

[0030] refer to Figure 2 The SBBR reaction tank 1 includes a reaction tank body 11 , a partition 14 is provided in the middle of the reaction tank body 11 , a plurality of biological filler racks 12 are installed in the reaction tank body 11 , and the plurality of biological filler racks 12 are evenly distributed on both sides of the partition 14 .

[0031] Each biofill rack 12 is loaded with a certain amount of composite filler. Aeration creates wastewater flow, allowing it to fully interact with the microorganisms on the filler. Composite fillers include, but are not limited to, fiber fillers, activated carbon, and ceramsite, providing a more favorable living environment for the microorganisms. Vertically, the microorganisms in the biofill racks 12 form a complex ecosystem comprised of multiple trophic levels, including bacteria, fungi, algae, protozoa, and metazoans. Horizontally, along the direction of water flow toward the carrier, a system of suspended aerobic, attached aerobic, attached facultative anoxic, and attached anaerobic microorganisms with diverse activity, respiration, and nutrient profiles is formed, enhancing the denitrification process's capacity and stability.

[0032] An aeration tray 13 is provided at the bottom of each biological filler rack 12. Multiple aeration trays 13 are interconnected via air pipes, and one of the multiple aeration trays 13 is connected to the aeration fan 3. The aeration trays 13 facilitate oxygen delivery from the aeration fan 3 to the biological filler racks 12, creating an aerobic environment.

[0033] The air stripping assembly 4 is installed on the side of the partition 14 close to the reaction tank body 11. The air stripping assembly 4 is connected to the aeration fan 3 for extracting sewage.

[0034] One side of the partition 14 is welded to the side wall of the reaction tank body 11, and the other side of the partition 14 is 50cm to 70cm away from the opposite side wall of the reaction tank body 11; the partition 14 is designed in this way to allow the sewage to flow horizontally in the reaction tank body 11.

[0035] In this embodiment, reference Figure 3 The air stripping component 4 uses the wind force of the aeration fan 3 to extract and raise the sewage in the reaction tank body 11, so that the sewage flows longitudinally, and the sewage is caused to flow horizontally and circumferentially in the reaction tank body 11 through the partition 14. The longitudinal flow and circumferential flow of the sewage form circulating sewage. The circulating flow of the sewage can make the pollutants therein fully contact with the microorganisms attached to the biological filler rack 12, make full use of the activity of the biological filler, and thus utilize endogenous denitrification to improve the denitrification effect, so that the total nitrogen in the effluent can be stably met the standard without adding or only adding a small amount of carbon source.

[0036] As a further solution of this embodiment, the sewage component 2 includes a regulating tank, in which a sewage pump is installed, and the sewage pump is connected to the water inlet 15 at the bottom of the reaction tank body 11 through a water pipe; by setting the water inlet 15 at the bottom of the reaction tank body 11, when the sewage pump transports sewage to the reaction tank body 11, the sewage is prevented from directly impacting the biological filler frame 12 under the drive of the sewage pump.

[0037] In this embodiment, liquid level sensors are installed on the regulating tank and the reaction tank body 11. A pH sensor, a sludge concentration sensor and a PLC are also installed on the reaction tank body 11. The PLC is electrically connected to the aeration fan 3, the sewage pump, the two liquid level sensors, the pH sensor and the sludge concentration sensor respectively.

[0038] The working principle of this embodiment is:

[0039] The SBBR sewage treatment plant operates in cycles, four times a day, with an average of one cycle every six hours. During each cycle, water intake, aeration, and circulation occur simultaneously. The sewage pump is started and stopped by the PLC based on the liquid level in the reaction tank 11, starting when the liquid level is low and stopping when the liquid level is high. Each sewage pump intake lasts approximately 30 minutes. The anaerobic time of the biochemical section of the SBBR reaction tank 1 is 1 hour. The aeration and circulation times are determined by the PLC using a pH sensor to collect pH values ​​in real time. The settling time is determined by the PLC using a sludge concentration sensor to collect sludge concentration values ​​in real time.

[0040] The specific process is:

[0041] Start the sewage pump, and the sewage in the regulating tank enters the bottom of the reaction tank body 11 through the water inlet 15 under the drive of the sewage pump. The liquid level sensor detects that the liquid level of the sewage reaches a certain height and turns off the sewage pump.

[0042] When the sewage pump is started, the aeration fan 3 is started at the same time. The aeration fan 3 sends air into the aeration plate 13 and the air stripping assembly 4 respectively. The air stripping assembly 4 uses the wind force of the aeration fan 3 to extract and raise the sewage in the reaction tank body 11. The sewage flows longitudinally and is caused to flow horizontally and annularly in the reaction tank body 11 through the partition 14. The longitudinal flow and the annular flow form circulating sewage. The circulating flow of the sewage can make the pollutants therein fully contact with the microorganisms attached to the biological filler rack 12, fully utilize the activity of the biological filler, and thus utilize endogenous denitrification to improve the denitrification effect.

[0043] Turn off the aeration fan 3, let it stand for a certain period of time, and then open the water outlet at the bottom of the reaction tank body 11 to discharge the denitrified sewage.

[0044] Example 2

[0045] This embodiment makes further limitations on the basis of embodiment 1, and the improvement lies in how to specifically set the gas stripping component 4.

[0046] refer to Figure 4 The gas stripping assembly 4 includes a first air pressure shell 41, a second air pressure shell 42, a connecting pipe 43, a Tesla tube 44, a rising pipe 45 and an air inlet pipe 46.

[0047] The lifting pipe 45 is fixed to the partition 14, with one end of the lifting pipe 45 being placed on one side of the partition 14, and the other end of the lifting pipe 45 being connected to the first air pressure housing 41 located on the other side of the partition 14;

[0048] refer to Figure 5 The first air pressure shell 41 is provided with an air inlet pipe 46 connected to the aeration fan 3. A Tesla tube 44 is fixed in the first air pressure shell 41. One end of the Tesla tube 44 passes through the end surface of the first air pressure shell 41 and is connected to the lifting pipe 45. The other end of the Tesla tube 44 is connected to the connecting pipe 43. The second air pressure shell 42 is sleeved on the connecting pipe 43, and two air vents 421 are symmetrically opened on the connecting pipe 43 near the bottom of the second air pressure shell 42.

[0049] In this embodiment, the first pneumatic housing 41 forms an outer air chamber, and the second pneumatic housing 42 forms an inner air chamber. When the aeration fan 3 does not introduce wind into the air inlet pipe 46, the Tesla tube 44, the connecting pipe 43, the outer air chamber and the inner air chamber are all filled with sewage.

[0050] The air inlet pipe 46 starts to take in air, and the air squeezes the sewage in the outer air chamber out through the through hole at the lower end of the outer air chamber, and the air squeezes the sewage in the inner air chamber out through the two vents 421 on the connecting pipe 43;

[0051] The air inlet pipe 46 continues to ventilate until the liquid levels of the outer air chamber and the inner air chamber drop to the air vent 421 of the connecting pipe 43. Air then enters through the air vent 421 of the connecting pipe 43 and breaks the sewage in the connecting pipe 43 to form bubbles 5. As air enters the air inlet pipe 46, the bubbles 5 gradually expand and are discharged through the Tesla tube 44 and the lifting pipe 45 in turn. At the moment when the bubbles 5 are discharged by the lifting pipe 45, a pressure difference is generated at both ends of the connecting pipe 43. The pressure difference drives the sewage to enter the connecting pipe 43 from the bottom of the connecting pipe 43, and then pass through the Tesla tube 44 and the lifting pipe 45 in turn to fall into the reaction tank body 11 from above the partition 14. In this cycle, pulsed bubbles 5 are continuously generated, so that the sewage is continuously lifted from the bottom of the reaction tank body 11 to above the partition 14.

[0052] The first and second air pressure shells 41, 42, and the vent holes 421 on the connecting pipe 43 can generate pulsed large bubbles 5 in the Tesla tube 44. Due to the unidirectional flow characteristics of the Tesla tube 44, the Tesla tube 44 can cooperate with the pulsed large bubbles 5, so that the sewage rises stably and quickly in the lifting pipe 45 under the action of the pressure difference. Compared with traditional air lift devices, the pulsed large bubbles 5 can increase the lifting force of the sewage, and the sewage lifting rate is higher.

[0053] As a further solution of this embodiment, refer to Figure 6The lifting pipe 45 has an inverted L-shaped structure. One end of the lifting pipe 45 passes over the partition 14 and bends to extend into the reaction tank body 11. A plug 452 is installed in the vertical pipe at the other end of the lifting pipe 45. A plug 451 is provided on the plug 452 to seal with it. The plug 451 and the plug 452 are connected by a connecting line. By using the plug 451 and the plug 452, when the sewage level in the reaction tank body 11 is lower than the first air pressure shell 41, since there is no sewage in the lifting pipe 45, the plug 451 loses buoyancy and will fall to block the plug 452, thereby closing the lifting pipe 45, so that the aeration fan 3 can automatically shut off the wind force entering the lifting pipe 45.

[0054] As a further solution of this embodiment, the first pneumatic shell 41 is a hollow cylinder with through holes at both ends of the hollow cylinder. The through hole at the upper end of the hollow cylinder is connected to the Tesla tube 44, and the through hole at the lower end of the hollow cylinder is installed with a baffle 411 and a filter screen. The baffle 411 is rotatably connected to the hollow cylinder; utilizing the unidirectional conduction characteristic of the Tesla tube 44, it is possible to prevent the sewage from flowing back during the pulse bubble 5 lifting process, thereby stabilizing the sewage lifting process; through the baffle 411, when the sewage liquid level in the reaction tank body 11 is lower than the first pneumatic shell 41, the baffle 411 loses buoyancy and thus seals the first pneumatic shell 41, and cooperates with the blocking ball 451 to enable the aeration fan 3 to automatically shut off the wind force entering the lifting pipe 45; the filter screen can filter out excessive impurities in the sewage.

[0055] As a further solution of this embodiment, the second pneumatic housing 42 has a hollow frustum structure with the large diameter end facing upward. The second pneumatic housing 42 is located inside the first pneumatic housing 41. The second pneumatic housing 42 is fixed to the connecting pipe 43 through a sleeve hole in the middle of its bottom surface. The second pneumatic housing 42 adopts a hollow frustum setting to form an inner air cavity, which is pneumatically matched with the outer air cavity formed by the first pneumatic housing 41.

[0056] As a further solution of this embodiment, the diameter of the cone opening of the second pneumatic shell 42 is larger than the diameter of the cone bottom surface; such a conical setting facilitates the sewage in the inner air cavity to sink under the ventilation of the aeration fan 3, thereby exposing the ventilation holes 421 to form pulsed large bubbles 5.

[0057] The working principle of this embodiment is:

[0058] The first air pressure housing 41 forms an outer air chamber, and the second air pressure housing 42 forms an inner air chamber. When the aeration fan 3 does not introduce wind power into the air inlet pipe 46, the Tesla tube 44, the connecting pipe 43, the outer air chamber and the inner air chamber are all filled with sewage.

[0059] The air inlet pipe 46 starts to take in air, and the air squeezes the sewage in the outer air chamber out through the through hole at the lower end of the outer air chamber, and the air squeezes the sewage in the inner air chamber out through the two vents 421 on the connecting pipe 43;

[0060] The air inlet pipe 46 continues to ventilate until the liquid levels of the outer air chamber and the inner air chamber drop to the air vent 421 of the connecting pipe 43. Air then enters through the air vent 421 of the connecting pipe 43 and breaks the sewage in the connecting pipe 43 to form bubbles 5. As air enters the air inlet pipe 46, the bubbles 5 gradually expand and are discharged through the Tesla tube 44 and the lifting pipe 45 in turn. At the moment when the bubbles 5 are discharged by the lifting pipe 45, a pressure difference is generated at both ends of the connecting pipe 43. The pressure difference drives the sewage to enter the connecting pipe 43 from the bottom of the connecting pipe 43, and then pass through the Tesla tube 44 and the lifting pipe 45 in turn to fall into the reaction tank body 11 from above the partition 14. In this cycle, pulsed bubbles 5 are continuously generated, so that the sewage is continuously lifted from the bottom of the reaction tank body 11 to above the partition 14.

[0061] The present invention utilizes the air volume of the aeration fan 3, without increasing energy consumption or adding a carbon source, and utilizes the air stripping component 4 and the partition 14 to fully contact the pollutants in the water with the microorganisms attached to the biological filler frame 12, thereby utilizing endogenous denitrification for efficient nitrogen removal without adding or only requiring the addition of a small amount of carbon source, so that the total nitrogen in the effluent is stably up to standard.

[0062] Although the specific embodiments of the invention are described in detail in conjunction with the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Within the scope described by the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. An SBBR sewage treatment plant with high efficiency denitrification, characterized by: The invention comprises an SBBR reaction tank (1) connected to a sewage component (2); the SBBR reaction tank (1) comprises a reaction tank body (11), a partition (14) is provided in the middle of the reaction tank body (11), one side of the partition (14) is mounted on the side wall of the reaction tank body (11), and the other side of the partition (14) is spaced a certain distance from the opposite side wall of the reaction tank body (11); The reaction tank body (11) is provided with a plurality of biological filler racks (12) evenly distributed on both sides of a partition (14), and an aeration disk (13) is provided at the bottom of each biological filler rack (12). An air stripping assembly (4) is installed on the side of the partition (14) close to the reaction tank body (11), and the air stripping assembly (4) and the plurality of aeration disks (13) are both connected to an aeration fan (3); The air stripping assembly (4) includes a lifting pipe (45) fixed on the partition (14), one end of the lifting pipe (45) is placed on one side of the partition (14), and the other end of the lifting pipe (45) is communicated with a first air pressure shell (41) located on the other side of the partition (14); an air inlet pipe (46) is provided on the first air pressure shell (41) and is communicated with the aeration blower (3); a Tesla tube (44) is fixed in the first air pressure shell (41), one end of the Tesla tube (44) passes through the end surface of the first air pressure shell (41) and is communicated with the lifting pipe (45), and the other end of the Tesla tube (44) is communicated with a connecting pipe (43), a second air pressure shell (42) is sleeved on the connecting pipe (43), and two air vents (421) are symmetrically opened on the connecting pipe (43) near the bottom of the second air pressure shell (42); The lifting pipe (45) is in an inverted L-shaped structure. One end of the lifting pipe (45) passes over the partition (14) and bends to extend into the reaction tank body (11). A plug (452) is installed in the vertical pipe at the other end of the lifting pipe (45). A plugging ball (451) is provided on the plugging pipe (452) to seal with the plugging ball (451). The plugging ball (451) is connected to the plugging pipe (452) via a connecting line. The first air pressure shell (41) comprises a hollow cylinder, both ends of the hollow cylinder are provided with through holes, the through hole at the upper end of the hollow cylinder is connected to the Tesla tube (44), and baffles (411) are installed at each through hole at the lower end of the hollow cylinder.

2. The SBBR sewage treatment plant for efficient denitrification according to claim 1, wherein: The second pneumatic housing (42) is a hollow truncated cone structure with the large diameter end facing upwards. The second pneumatic housing (42) is located inside the first pneumatic housing (41). The second pneumatic housing (42) is fixed to the connecting pipe (43) through a sleeve hole in the middle of its bottom surface.

3. The SBBR sewage treatment plant with high efficiency denitrification according to claim 1, wherein: The plurality of aeration discs (13) are connected in sequence via air pipes, and one of the plurality of aeration discs (13) is connected to the aeration fan (3).

4. The SBBR sewage treatment plant with high efficiency denitrification according to claim 1, wherein: The sewage component (2) comprises a regulating tank, wherein a sewage pump is installed in the regulating tank, and the sewage pump is connected to the water inlet (15) at the bottom of the reaction tank body (11) through a water pipe.

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