A high-efficiency MBBR wastewater treatment device that simultaneously performs nitrification and denitrification

Abstract

This invention provides a highly efficient MBBR wastewater treatment device that simultaneously performs nitrification and denitrification. The highly efficient MBBR wastewater treatment reactor includes a cylindrical body, a hyperbolic paraboloid, and an aeration device. An oxygen-rich zone and an anoxic zone are generated by a two-phase flow, which is produced by aeration at the bottom of the hyperbolic paraboloid and forms a physical circulation flow within the chamber. In this highly efficient MBBR wastewater treatment device that simultaneously performs nitrification and denitrification, during aeration, the air-water mixture inside the hyperbolic paraboloid forms a two-phase flow, creating an oxygen-rich zone inside the hyperbolic paraboloid, where the oxygen content reaches its maximum at the throat, and an anoxic zone outside the hyperbolic paraboloid. The wastewater treatment device in this application allows nitrification and denitrification reactions to occur simultaneously, ensuring a high total nitrogen removal rate. In the anoxic zone, the thorough denitrification reaction further reduces total phosphorus, achieving a deep COD removal effect.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to an MBBR wastewater treatment device that simultaneously performs nitrification and denitrification. Background Technology

[0002] Wastewater treatment involves removing and degrading harmful substances and pollutants from wastewater to render it harmless. Wastewater treatment should prioritize the selection of mature, reliable technologies suitable for specific wastewater treatment applications. MBBR (Moving Bed Biofilm Container) is frequently used in wastewater treatment. It is a revolutionary biofilm container that has received considerable attention from researchers in recent years. It was developed to address the complexities of fixed-bed containers requiring periodic backwashing, fluidized-bed containers requiring carrier fluidization, and submerged biological filters requiring filter media cleaning and aerator replacement due to clogging.

[0003] Existing MBBR (Medium-Low Temperature Regulator) systems utilize bottom aeration, where microbubbles and water are thoroughly mixed to achieve a density less than water, thus fluidizing the MBBR packing material within the chamber. Traditional MBBR units operate in a homogeneous zone. While high dissolved oxygen levels in this homogeneous zone enhance nitrification, they significantly inhibit denitrification. This results in insufficient fluidization and difficulty in controlling oxygen levels in existing MBBR reactors. Insufficient fluidization leads to decreased reactor efficiency, and improper oxygen control hinders biological reactions, ultimately impacting wastewater treatment effectiveness. Summary of the Invention

[0004] This invention provides a high-efficiency MBBR wastewater treatment device that simultaneously performs nitrification and denitrification, aiming to solve the problem in existing MBBR devices where the operation of aerobic and facultative / anaerobic bacteria interferes with each other, affecting the wastewater treatment effect.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a high-efficiency MBBR wastewater treatment device that simultaneously performs nitrification and denitrification, comprising:

[0006] The container body is equipped with an inlet pipe and an outlet pipe;

[0007] A hyperbolic paraboloid is installed inside the chamber, with its axis arranged vertically and its internal dimensions gradually increasing from the middle to both ends.

[0008] An aeration device, wherein the air outlet of the aeration device is located at the opening below the hyperbolic paraboloid, and is used to deliver gas into the hyperbolic paraboloid.

[0009] In one possible implementation, the oxygen-rich zone formed by the hyperbolic paraboloid occupies 20% to 70% of the total internal space of the chamber.

[0010] In one possible implementation, the diameter of the bottom of the hyperbolic parabola is larger than the diameter of the top of the hyperbolic parabola.

[0011] In one possible implementation, the sidewalls of the hyperbolic paraboloid have an arc-shaped cross-section along the vertical direction.

[0012] In one possible implementation, the aeration device includes:

[0013] An aerator is installed inside the hyperbolic paraboloid and located at the bottom end of the hyperbolic paraboloid;

[0014] An air supply pipe is fixedly installed on the chamber and connected to the aerator for supplying gas into the aerator.

[0015] In one possible implementation, the gas pipeline includes:

[0016] An outer annular tube is fixedly connected to the inner wall of the hyperbolic paraboloid, and a plurality of aerators are arranged on the outer annular tube.

[0017] There are multiple inner annular tubes, and the multiple inner annular tubes are arranged inside the outer annular tube. Multiple aerators are arranged on the inner annular tubes.

[0018] A connecting pipe is disposed between the outer annular pipe and the inner annular pipe for connecting the outer annular pipe and the inner annular pipe;

[0019] An air intake pipe is fixedly installed on the chamber body and is connected to the outer annular pipe.

[0020] In one possible implementation, the axes of the plurality of inner annular tubes and the outer annular tube are arranged to coincide with each other.

[0021] In one possible implementation, a plurality of the inner annular tubes are arranged in a circular array inside the outer annular tube with the axis of the outer annular tube as the center.

[0022] In one possible implementation, a fixing assembly for mounting the outer annular tube onto the hyperbolic paraboloid is provided on the hyperbolic paraboloid surface, the fixing assembly comprising:

[0023] A semi-circular buckle is hinged to the inner wall of the hyperbolic paraboloid, and the hinge axis of the semi-circular buckle is set in the horizontal direction.

[0024] A limiting plate is fixedly installed on the outside of the semi-circular buckle. When the opening of the semi-circular buckle faces downward, the limiting plate is located on the outside of the hyperbolic paraboloid.

[0025] A limiting component is disposed between the limiting plate and the hyperbolic paraboloid, for limiting the limiting plate to flip outwards from the hyperbolic paraboloid.

[0026] In one possible implementation, the limiting component includes:

[0027] A retaining ring is slidably disposed on the outer side of the hyperbolic paraboloid. The side wall of the hyperbolic paraboloid is provided with a clearance groove for avoiding the rotation of the limiting plate. When the retaining ring slides to the clearance groove, the inner wall of the retaining ring is attached to the outer wall of the hyperbolic paraboloid.

[0028] A fastener, which passes through the retaining ring and is threaded to the side wall of the hyperbolic paraboloid, is used to fix the retaining ring to the hyperbolic paraboloid when the retaining ring is attached to the hyperbolic paraboloid.

[0029] The solution shown in this application, compared with the prior art, features a chamber with a hyperbolic paraboloid installed inside. The hyperbolic paraboloid is fixedly installed inside the chamber, and the central diameter of its inner hole is smaller than that at both ends. An aeration device is installed at the lower opening of the hyperbolic paraboloid to supply gas into its interior. An oxygen-rich zone and anoxic zone are generated by a two-phase flow, produced by aeration at the bottom of the hyperbolic paraboloid, forming a physical circulation within the chamber. In use, water is added to the chamber, overflowing the top of the hyperbolic paraboloid. The aeration device then generates gas, which drives the water upwards within the hyperbolic paraboloid. Driven by the air bubbles, a two-phase flow is formed within the hyperbolic paraboloid, flowing out and interacting with external water, creating a continuous circulation process where water flows in from the bottom and out from the top of the hyperbolic paraboloid. This allows water to circulate between the inside and outside of the hyperbolic paraboloid, ensuring sufficient fluidization within the chamber. During aeration, an oxygen-rich zone forms inside the hyperbolic paraboloid, reaching its maximum oxygen content at the throat, while an anoxic zone forms on the outside. The wastewater treatment device in this application allows nitrification and denitrification reactions to occur simultaneously, guaranteeing a high total nitrogen removal rate. In the anoxic zone, the thorough denitrification further reduces total phosphorus, achieving a deep COD removal effect. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of an MBBR wastewater treatment device that simultaneously performs high-efficiency nitrification and denitrification, as provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the outer annular tube provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the gas transmission pipe provided in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the gas pipeline provided in another embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Chamber body; 2. Hyperbolic paraboloid; 3. Aeration device; 31. Aerator; 32. Air supply pipe; 321. Outer annular pipe; 322. Inner annular pipe; 323. Connecting pipe; 324. Air inlet pipe; 4. Fixing components; 41. Semi-circular buckle; 42. Limiting plate; 43. Limiting components; 431. Snap ring; 432. Fixing component. Detailed Implementation

[0036] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0037] Specific embodiments are merely illustrative of the invention and are not intended to limit the invention. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly or indirectly on that other element. When an element is referred to as "connected to" another element, it can be directly or indirectly connected to that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] Please refer to the following: Figure 1 , Figure 2 and Figure 3 , Figure 4 The present invention will now describe the MBBR wastewater treatment device that simultaneously performs high-efficiency nitrification and denitrification. The MBBR wastewater treatment device includes a chamber 1, a hyperbolic paraboloid 2, and an aeration device 3. The chamber 1 is equipped with an inlet pipe and an outlet pipe; the hyperbolic paraboloid 2 is installed inside the chamber 1, with its axis arranged vertically, and its internal dimensions gradually increasing from the middle to both ends; the outlet of the aeration device 3 is located below the hyperbolic paraboloid 2 and is used to supply gas into the interior of the hyperbolic paraboloid 2.

[0039] The MBBR wastewater treatment device providing this embodiment, which simultaneously performs high-efficiency nitrification and denitrification, differs from existing technologies in that it features a chamber 1 with a hyperbolic paraboloid 2 installed inside. The inlet pipe on the chamber 1 is positioned below the bottom of the hyperbolic paraboloid 2, while the outlet pipe is positioned above the top. The hyperbolic paraboloid 2 is fixedly installed inside the chamber 1, with the central portion of its inner bore smaller than its two ends. An aeration device 3 is installed at the lower end of the hyperbolic paraboloid 2 to supply gas into its interior. An oxygen-rich zone and anoxic zone are generated by a two-phase flow, which is produced by aeration at the bottom of the hyperbolic paraboloid 2, creating a physical circulation within the chamber 1. In use, water is added to the chamber 1 until it overflows the top of the hyperbolic paraboloid 2. Then, the aeration device 3 is activated, generating gas that drives the water upwards within the hyperbolic paraboloid 2. Driven by air bubbles, a two-phase flow of air and water is formed inside the hyperbolic paraboloid 2. This flow, combined with external water, creates a continuous circulation process with water constantly flowing in from the bottom and out from the top of the hyperbolic paraboloid 2. This creates a circulating flow dynamic between the inside and outside of the hyperbolic paraboloid 2, ensuring sufficient fluidization of the water within the chamber 1. Furthermore, during aeration, an oxygen-rich zone is formed inside the hyperbolic paraboloid 2, with the oxygen content reaching its maximum in the middle, while an anoxic zone is formed on the outside. The wastewater treatment device in this application has two zones with varying dissolved oxygen levels, allowing nitrification and denitrification reactions to occur simultaneously, ensuring a high total nitrogen removal rate. In the anoxic zone, the thorough denitrification reaction further reduces total phosphorus, achieving a deep COD removal effect.

[0040] In some embodiments, the aforementioned container 1 may adopt the following... Figure 1 The structure shown. See also Figure 1The hyperbolic paraboloid 2 contains an oxygen-rich zone that occupies 20% to 70% of the total internal space of the chamber 1. The reasonable proportion of the hyperbolic paraboloid 2 within the chamber 1 facilitates subsequent adjustments to the aeration rate, ensuring the dissolved oxygen content in both the oxygen-rich and anoxic zones, and guaranteeing simultaneous nitrification and denitrification reactions.

[0041] In some embodiments, the hyperbolic paraboloid 2 described above can be adopted as follows: Figure 1 The structure shown. See also Figure 1 The diameter of the bottom opening of the hyperbolic paraboloid 2 is larger than the diameter of the top opening. The larger inner diameter at the bottom of the hyperbolic paraboloid 2 increases the aeration area and the amount of aeration entering the interior. The smaller inner diameter at the top of the hyperbolic paraboloid 2 increases the flow velocity of water exiting the interior, thus ensuring sufficient fluidization of the packing material within the chamber 1. Furthermore, the cross-sectional area of ​​the inner hole in the middle of the hyperbolic paraboloid 2 is the smallest, creating a high dissolved oxygen and high fluidization environment in the middle, significantly improving mass transfer and biofilm renewal of aerobic bacteria, and providing a more favorable living environment for aerobic bacteria.

[0042] In some embodiments, the hyperbolic paraboloid 2 described above can be adopted as follows: Figure 1 The structure shown. See also Figure 1 The sidewalls of the hyperbolic paraboloid 2 have an arc-shaped cross-section along the vertical direction. The entire cross-section of the hyperbolic paraboloid 2 forms a hyperbolic paraboloid 2 structure, creating a high dissolved oxygen and highly fluidized environment inside, significantly improving mass transfer and biofilm renewal of aerobic bacteria, and providing a more favorable living environment for aerobic bacteria. Simultaneously, the arc-shaped structure facilitates the guidance of liquid flow. Furthermore, a low dissolved oxygen zone is formed outside the hyperbolic paraboloid 2, providing a highly favorable low-oxygen living environment for denitrifying bacteria, significantly improving the nitrogen removal efficiency of the MBBR system.

[0043] In some embodiments, the aeration device 3 described above can be as follows: Figure 1 , Figure 3 , Figure 4 The structure shown. See also... Figure 1 , Figure 3 , Figure 4The aeration device 3 includes an aerator 31 and an air supply pipe 32. The aerator 31 is installed inside the hyperbolic paraboloid 2 and located at the bottom end of the hyperbolic paraboloid 2. The air supply pipe 32 is fixedly installed on the chamber 1 and connected to the aerator 31 for supplying gas into the aerator 31. The aerator 31 is a microporous aerator. There are multiple aerators 31, all of which are installed on and connected to the air supply pipe 32. The aerators 31 are located inside the casing and near the bottom end of the casing. This ensures that the bubbles generated by the aerators 31 can all flow into the hyperbolic paraboloid 2. This avoids affecting the gas content inside or outside the hyperbolic paraboloid 2, preventing the low dissolved oxygen zone and high dissolved oxygen zone from failing to reach the preset dissolved oxygen concentration. Furthermore, while ensuring that all aerated gas flows out through the hyperbolic paraboloid 2, the oxygen content in the high dissolved oxygen zone can be controlled by controlling the aeration rate. To avoid the situation where a large amount of gas generated by aerator 31 flows into the low dissolved oxygen zone, causing the oxygen content in the high dissolved oxygen zone to fall below the preset concentration while the oxygen content in the low dissolved oxygen zone exceeds the preset concentration, ultimately affecting both nitrification and denitrification reactions.

[0044] Specifically, in this embodiment, the air inlet of the air supply pipe 32 is located outside the chamber 1, and the part of the air supply pipe 32 located inside the hyperbolic paraboloid 2 is fixedly installed on the inner wall of the hyperbolic paraboloid 2.

[0045] Optionally, in this embodiment, a support base is provided at the bottom of the hyperbolic paraboloid 2. The support base is fixedly installed at the bottom of the chamber 1, and a groove is provided on the top surface of the support base to accommodate the side wall of the hyperbolic paraboloid 2. The hyperbolic paraboloid 2 is positioned through the groove, thereby facilitating its installation into the chamber 1. Simultaneously, mounting holes for installing limiting pins can be provided on the support base and the side wall of the hyperbolic paraboloid 2. A pin can be installed inside the mounting hole to limit the movement of the hyperbolic paraboloid 2 relative to the support base.

[0046] Optionally, in this embodiment, the support base adopts a columnar structure, and there are multiple support bases arranged around the ends of the hyperbolic paraboloid 2 along its circumference. Using a columnar structure can reduce the resistance to liquid backflow into the hyperbolic paraboloid 2.

[0047] In some embodiments, the gas supply pipe 32 may be adopted as follows: Figure 1 , Figure 3 , Figure 4 The structure shown. See also... Figure 1 , Figure 3 , Figure 4The air supply pipe 32 includes an outer annular pipe 321, an inner annular pipe 322, a connecting pipe 323, and an air inlet pipe 324. The outer annular pipe 321 is fixedly connected to the inner wall of the hyperbolic paraboloid 2, and multiple aerators 31 are arranged on the outer annular pipe 321; there are multiple inner annular pipes 322, which are arranged inside the outer annular pipe 321, and multiple aerators 31 are arranged on the inner annular pipe 322; the connecting pipe 323 is arranged between the outer annular pipe 321 and the inner annular pipe 322, and is used to connect the outer annular pipe 321 and the inner annular pipe 322; the air inlet pipe 324 is fixedly installed on the chamber 1 and is connected to the outer annular pipe 321. The outer annular pipe 321 is attached to and fixedly installed on the inner wall of the hyperbolic paraboloid 2. Multiple aerators 31 are installed on the outer annular pipe 321 and the inner annular pipe 322, and these aerators 31 are evenly installed on the outer annular pipe 321 and the inner annular pipe 322, allowing for uniform gas delivery into the hyperbolic paraboloid 2 and ensuring gas uniformity within the hyperbolic paraboloid 2. The outer annular pipe 321 and the inner annular pipe 322 are fixedly connected by a connecting pipe 323, with both ends of the connecting pipe 323 communicating with the outer annular pipe 321 and the inner annular pipe 322, respectively. An air inlet pipe 324 is connected to the outer annular pipe 321 and is fixedly installed on the chamber 1, communicating with the air outlet of an external gas delivery device.

[0048] Optionally, in this embodiment, the air intake pipe 324 penetrates the side wall of the chamber 1 and is sealed to the side wall of the chamber 1.

[0049] Optionally, in this embodiment, the air intake pipe 324 extends from the top of the chamber 1 into the interior of the chamber 1 and extends to the bottom of the chamber 1 to communicate with the outer annular pipe 321.

[0050] In some embodiments, the gas supply pipe 32 may be adopted as follows: Figure 1 , Figure 3 The structure shown. See also... Figure 1 , Figure 3 Multiple inner annular tubes 322 are arranged with their axes coinciding with those of the outer annular tube 321. The outer diameters of the multiple inner annular tubes 322 decrease sequentially, and the smaller inner annular tube 322 is located inside the larger inner annular tube 322. The largest inner annular tube 322 is located inside the outer annular tube 321. The outer annular tube 321 and the multiple inner annular tubes 322 are interconnected and communicate with each other through connecting pipes 323. The arrangement of multiple inner annular tubes 322 allows multiple aerators 31 to be evenly distributed at the bottom of the hyperbolic paraboloid 2. Thus, during operation, the gas can be evenly distributed inside the hyperbolic paraboloid 2, ensuring the uniformity of the gas inside the hyperbolic paraboloid 2.

[0051] In some embodiments, the gas supply pipe 32 may be adopted as follows: Figure 1 , Figure 4 The structure shown. See also... Figure 1 , Figure 4 Multiple inner annular tubes 322 are arranged in a ring array inside the outer annular tube 321, centered on its axis. The outer annular tube 321 is located on the outermost side and is fixedly installed on the inner wall of the hyperbolic paraboloid 2. Multiple inner annular tubes 322 are arranged in a ring inside the outer annular tube 321. Furthermore, an inner annular tube 322 is also located at the center of the outer annular tube 321, coaxially positioned with the outer annular tube 321. This ensures uniform distribution of the aerators 31 on both the outer and inner annular tubes 321, improving the uniformity of oxygen content within the hyperbolic paraboloid 2.

[0052] In some embodiments, the hyperbolic paraboloid 2 and the annular tube described above can be adopted as follows: Figure 2 The structure shown. See also Figure 2 A fixing assembly 4 for installing an outer annular tube 321 onto the hyperbolic paraboloid 2 is provided on the hyperbolic paraboloid 2. The fixing assembly 4 includes a semi-circular buckle 41, a limiting plate 42, and a limiting component 43. The semi-circular buckle 41 is hinged to the inner wall of the hyperbolic paraboloid 2, and the hinge axis of the semi-circular buckle 41 is set in the horizontal direction. The limiting plate 42 is fixedly installed on the outer side of the semi-circular buckle 41. When the opening of the semi-circular buckle 41 faces downward, the limiting plate 42 is located on the outer side of the hyperbolic paraboloid 2. The limiting component 43 is disposed between the limiting plate 42 and the hyperbolic paraboloid 2, and is used to limit the limiting plate 42 from flipping outward on the hyperbolic paraboloid 2. Multiple semi-circular buckles 41 are rotatably arranged on the inner wall of the hyperbolic paraboloid 2. When installing the outer annular tube 321, the opening of the semi-circular buckle 41 can be rotated to face downward, and the outer annular tube 321 can be installed into the semi-circular buckle 41. This pushes the outer annular tube 321 upward, causing the circular buckle to rotate on the side wall of the hyperbolic paraboloid 2. It also causes the limiting plate 42 to rotate inside the hyperbolic paraboloid 2, and then the limiting component 43 restricts the limiting plate 42 from rotating out of the inner wall of the hyperbolic paraboloid 2. This ensures that the opening of the semi-circular buckle 41 faces horizontally, preventing the outer annular tube 321 from sliding out of the semi-circular buckle 41.

[0053] Specifically, in this embodiment, a hyperbolic paraboloid 2 is fixedly installed on the inner wall of the hyperbolic paraboloid 2, the hinge shaft of the semicircular buckle 41 is fixedly installed on the outer side of the semicircular buckle 41, and the hinge shaft of the semicircular buckle 41 is rotatably disposed inside the hyperbolic paraboloid 2.

[0054] In some embodiments, the limiting component 43 may employ, for example... Figure 1 , Figure 2 The structure shown. See also... Figure 1 , Figure 2 The limiting component 43 includes a retaining ring 431 and a fixing member 432. The retaining ring 431 is slidably disposed on the outer side of the hyperbolic paraboloid 2. The side wall of the hyperbolic paraboloid 2 is provided with a clearance groove for avoiding the rotation of the limiting plate 42. When the retaining ring 431 slides to the clearance groove, the inner wall of the retaining ring 431 is in contact with the outer side wall of the hyperbolic paraboloid 2. The fixing member 432 is disposed through the retaining ring 431 and is threadedly connected to the side wall of the hyperbolic paraboloid 2. It is used to fix the retaining ring 431 to the hyperbolic paraboloid 2 when the retaining ring 431 is in contact with the hyperbolic paraboloid 2. The retaining ring 431 is entirely sleeved on the outer side of the hyperbolic paraboloid 2, and the inner hole of the retaining ring 431 is larger than the outer diameter of the top of the hyperbolic paraboloid 2 and smaller than the outer diameter of the bottom of the hyperbolic paraboloid 2. Furthermore, when the semi-circular buckle rotates to a horizontal position, the outer side of the limiting plate 42 is flush with the outer wall of the hyperbolic paraboloid 2. This prevents the limiting plate 42 from continuing to swing outward when the retaining ring 431 slides to the clearance groove, thus preventing the outer annular tube 321 from disengaging from the semi-circular buckle 41 and securing the semi-circular buckle 41 to the inside of the hyperbolic paraboloid 2. When the outer annular tube 321 needs to be disassembled for maintenance, the retaining ring 431 can be moved upward to disengage from the clearance groove. The outer annular tube 321 then rotates the semi-circular buckle 41 under its own weight, thereby disengaging the outer annular tube 321 from the inside of the semi-circular buckle 41. This operation is convenient and facilitates the subsequent disassembly and fixation of the hyperbolic paraboloid 2 and the outer annular tube 321.

[0055] Specifically, in this embodiment, the fixing member 432 is a screw, and a threaded hole corresponding to the fixing member 432 is provided on the hyperbolic paraboloid 2. When the inner wall of the retaining ring 431 is fitted against the outer side of the hyperbolic paraboloid 2, and when the retaining ring 431 is located in the relief groove, the through hole on the retaining ring 431 coincides with the threaded hole on the hyperbolic paraboloid 2. Thus, the retaining ring 431 can be fixed to the outer side of the hyperbolic paraboloid 2.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency MBBR wastewater treatment device that simultaneously performs nitrification and denitrification, characterized in that, include: The container body is equipped with an inlet pipe and an outlet pipe; A hyperbolic paraboloid is installed inside the chamber, with its axis arranged vertically and its internal dimensions gradually increasing from the middle to both ends. An aeration device, wherein the air outlet of the aeration device is located at the opening below the hyperbolic paraboloid, and is used to deliver gas into the hyperbolic paraboloid; The diameter at the bottom of the hyperbolic parabola is larger than the diameter at the top of the hyperbolic parabola; The sidewalls of the hyperbolic paraboloid have an arc-shaped cross-section along the vertical direction; The aeration device includes: An aerator is installed inside the hyperbolic paraboloid and located at the bottom end of the hyperbolic paraboloid; An air supply pipe is fixedly installed on the chamber and connected to the aerator for supplying gas into the aerator. The gas pipeline includes: An outer annular tube is fixedly connected to the inner wall of the hyperbolic paraboloid, and a plurality of aerators are arranged on the outer annular tube. A fixing assembly for mounting the outer annular tube onto the hyperbolic paraboloid is provided on the hyperbolic paraboloid surface, the fixing assembly comprising: A semi-circular buckle is hinged to the inner wall of the hyperbolic paraboloid, and the hinge axis of the semi-circular buckle is set in the horizontal direction. A limiting plate is fixedly installed on the outside of the semi-circular buckle. When the opening of the semi-circular buckle faces downward, the limiting plate is located on the outside of the hyperbolic paraboloid. A limiting component is disposed between the limiting plate and the hyperbolic paraboloid, for limiting the limiting plate to flip outwards from the hyperbolic paraboloid; The limiting component includes: A retaining ring is slidably disposed on the outer side of the hyperbolic paraboloid. The side wall of the hyperbolic paraboloid is provided with a clearance groove for avoiding the rotation of the limiting plate. When the retaining ring slides to the clearance groove, the inner wall of the retaining ring is attached to the outer wall of the hyperbolic paraboloid. A fastener, which passes through the retaining ring and is threaded to the side wall of the hyperbolic paraboloid, is used to fix the retaining ring to the hyperbolic paraboloid when the retaining ring is attached to the hyperbolic paraboloid.

2. The MBBR wastewater treatment device that simultaneously performs high-efficiency nitrification and denitrification as described in claim 1, characterized in that, The oxygen-rich zone contained in the hyperbolic paraboloid accounts for 20% to 70% of the total internal space of the chamber.

3. The MBBR wastewater treatment device that simultaneously performs high-efficiency nitrification and denitrification as described in claim 1, characterized in that, The gas pipeline also includes: There are multiple inner annular tubes, and the multiple inner annular tubes are arranged inside the outer annular tube. Multiple aerators are arranged on the inner annular tubes. A connecting pipe is disposed between the outer annular pipe and the inner annular pipe for connecting the outer annular pipe and the inner annular pipe; An air intake pipe is fixedly installed on the chamber body and is connected to the outer annular pipe.

4. The MBBR wastewater treatment device that simultaneously performs high-efficiency nitrification and denitrification as described in claim 3, characterized in that, The axes of the multiple inner annular tubes and the outer annular tubes are arranged to coincide with each other.

5. The MBBR wastewater treatment device that simultaneously performs high-efficiency nitrification and denitrification as described in claim 3, characterized in that, Multiple inner annular tubes are arranged in a circular array inside the outer annular tube with the axis of the outer annular tube as the center.

Images