Sewage treatment device

Abstract

The utility model provides a sewage treatment device which comprises a tank body, an inner cylinder is arranged in the tank body, a supporting piece is sleeved on the inner cylinder, and the supporting piece is connected with the tank body; an anoxic zone is arranged at the bottom of the tank body, a water inlet pipe penetrates through the tank body, and one end, positioned in the tank body, of the water inlet pipe extends into the anoxic zone; an aerobic zone is formed between the tank body and the outer wall of the inner cylinder body, is positioned above the anoxic zone, and is provided with an aeration assembly for increasing the content of dissolved oxygen and providing micro power; a guide cylinder is further arranged at the top end of the tank body, the guide cylinder extends into the top end of the inner cylinder body, and an overflowing channel for sewage to flow is formed between the inner cylinder body and the guide cylinder; a water outlet pipe is further arranged in the tank body in a penetrating manner, one end, positioned in the tank body, of the water outlet pipe extends into the guide cylinder, a sludge discharge pipe is further arranged in the tank body in a penetrating manner, and one end, positioned in the tank body, of the sludge discharge pipe extends into the inner cylinder body and is close to the anoxic zone. The device has the advantages of low power consumption and automatic sludge backflow.

Description

Technical Field

[0001] The utility model relates to the technical field of water pollution treatment, in particular to a sewage treatment device. Background Art

[0002] Traditional sewage treatment processes, including the AO process, have the effect of nitrogen and phosphorus removal and are widely used in the field of sewage treatment.

[0003] In order to conveniently treat sewage, technicians have developed relevant sewage treatment devices. For example, the invention with the authorized publication number of CN115321750A, which relates to a sewage micro-power AO integrated device, includes a device main body, a reflux pipe, a water inlet pipe, a water outlet pipe and a clear water pipe. An anoxic zone, an aerobic zone and a sedimentation zone are formed inside the device main body from top to bottom. Both ends of the reflux pipe are respectively communicated with the anoxic zone and the aerobic zone. One end of the water inlet pipe extends into the device main body and is communicated with the anoxic zone. One end of the water outlet pipe is located in the aerobic zone, and the other end of the water outlet pipe is located in the sedimentation zone. One end of the clear water pipe is located in the sedimentation zone, and the other end of the clear water pipe penetrates through the device main body and extends outwards. When treating sewage, the sewage enters the anoxic zone through the water inlet pipe by using the inertia force generated during discharge. The sewage treated anoxically in the anoxic zone flows to the aerobic zone through the reflux pipe by using the gravitational potential energy. The sewage treated in the aerobic zone is discharged into the sedimentation zone through the water outlet pipe by using the gravitational potential energy for sedimentation so that the dirt and the clear water are separated. The separated clear water is discharged through the clear water pipe by using the gravitational potential energy.

[0004] However, in the AO process, a part of the precipitated sludge needs to be refluxed to the anoxic tank as digestion liquid to maintain a sufficient activated sludge concentration and improve the treatment efficiency of sewage in the anoxic tank. Using the sewage treatment device in the related technology, the sludge cannot be automatically refluxed, resulting in low sewage treatment efficiency. Summary of the Utility Model

[0005] In order to improve the problem that the existing sludge cannot be automatically refluxed, resulting in low sewage treatment efficiency, the utility model provides a highly efficient, energy-saving and environment-friendly micro-power sewage treatment device.

[0006] A sewage treatment device provided by the utility model adopts the following technical scheme:

[0007] A sewage treatment device, comprising a tank body, an inner cylinder is arranged inside the tank body, a support member is sleeved on the inner cylinder, and the support member is connected to the tank body; the bottom of the tank body is an anoxic zone, a water inlet pipe penetrates through the tank body, and one end of the water inlet pipe located inside the tank body extends into the anoxic zone; an aerobic zone is formed between the outer walls of the tank body and the inner cylinder, the aerobic zone is located above the anoxic zone, and the aerobic zone is provided with an aeration assembly for increasing the dissolved oxygen content and providing micro-power; a guiding cylinder is further arranged at the top end of the tank body, the guiding cylinder extends into the top end of the inner cylinder, and a flow-through channel for sewage to flow through is formed between the inner cylinder and the guiding cylinder; the tank body further penetrates through a water outlet pipe, one end of the water outlet pipe located inside the tank body extends into the guiding cylinder, and the tank body further penetrates through a sludge discharge pipe, one end of the sludge discharge pipe located inside the tank body extends into the inner cylinder and is close to the anoxic zone.

[0008] Through the above technical solution, when sewage is treated, the sewage enters the anoxic zone through the water inlet pipe, and the sewage undergoes denitrification reaction in the anoxic zone, thereby completing nitrogen removal. As the sewage gradually increases, the dissolved oxygen concentration in the aerobic zone is increased through the aeration assembly. Moreover, through the micro-power, the sewage undergoes nitrification reaction, oxidation reaction, biological adsorption and degradation reactions in the aerobic zone, realizing the efficient degradation of pollutants such as organic matter, nitrogen and phosphorus.

[0009] The micro-power generated by the air-lift effect helps to drive the sewage to circulate inside the device, enhancing the contact between the sewage and the microorganisms, and further improving the reaction efficiency. The micro-power circulation can promote the uniform distribution of dissolved oxygen and nutrients in the sewage, improving the metabolic rate and degradation efficiency of the microorganisms. At the same time, the circulating flow also helps to reduce sludge deposition and caking phenomena, keeping the inside of the device clean and unobstructed. The sewage in the aerobic zone flows into the inner cylinder through the flow-through channel for sedimentation, separating the mud and water. The supernatant that meets the discharge standard is located inside the guiding cylinder, and the supernatant at the guiding cylinder is discharged through the water outlet pipe. The sludge is sedimented through the inner cylinder and flows back to the anoxic zone by gravity, so that no additional driving source is required, and the sludge automatically flows back to the anoxic zone, thereby ensuring the microbial content in the anoxic zone, and then ensuring the treatment efficiency of the sewage in the anoxic zone. Finally, part of the sludge is discharged regularly through the sludge discharge pipe.

[0010] In summary, the combined construction method of the anoxic zone, the aerobic zone and the inner cylinder breaks the traditional AO process of independently arranging the anoxic tank, the aerobic tank and the sedimentation tank in the horizontal or vertical direction. The three are organically combined through the combined construction method, which helps to reduce the floor area. And through the inner cylinder for sedimentation, it automatically flows back to the anoxic zone, thereby ensuring the microbial content in the anoxic zone, which is beneficial to improving the sewage treatment efficiency.

[0011] Preferably, the inner cylinder body includes a circulation part, a precipitation part, and a separation part which are distributed in sequence from bottom to top. The bottom end of the circulation part is communicated with the inside of the tank body; the precipitation part is arranged to shrink from top to bottom, the small-mouth end of the precipitation part is communicated with the top end of the circulation part, the bottom end of the separation part is communicated with the large-mouth end of the precipitation part, and the bottom end of the guiding cylinder extends into the separation part.

[0012] Through the above technical solution, when the sewage completes the reaction in the aerobic zone, the micro-power generated by the air-lift effect of the aeration assembly pushes the sewage to flow upward, so that the sewage in the aerobic zone flows from the overflow channel into the inner cylinder body and is located in the precipitation part for precipitation to separate the mud and water. The supernatant liquid meeting the standards is located in the guiding cylinder, and the sludge precipitates in the precipitation area under the action of gravity and flows out from the circulation part through the guidance of the precipitation part to the anoxic zone. The precipitation part is conducive to preventing sludge residue and better guiding the sludge to the anoxic zone.

[0013] Preferably, the aeration assembly includes an air delivery pipe and an aeration disc arranged on the air delivery pipe; the air delivery pipe includes an air inlet section, a first air outlet section, a shunt section, and a second air outlet section; the air inlet section penetrates through the tank body, and one end of the air inlet section located outside the tank body is connected with a blower. The first air outlet section is communicated with one end of the air inlet section located inside the tank body. The two ends of the shunt section are correspondingly communicated with the first air outlet section and the second air outlet section, and the first air outlet section surrounds the second air outlet section. The second air outlet section is on the same central axis as the first air outlet section, and the aeration disc is arranged on the first air outlet section and the second air outlet section.

[0014] Through the above technical solution, during aeration, the blower sends the gas into the first air outlet section through the air inlet section, and the oxygen source enters the aeration disc on the first air outlet section for aeration, thereby increasing the oxygen concentration in the aerobic zone. Part of the oxygen in the first air outlet section enters the second air outlet section through the shunt section. Similarly, it is aerated through the aeration disc on the second air outlet section, thereby increasing the dissolved oxygen concentration in the aerobic zone through the aeration disc. At the same time, the micro-power generated by the air-lift effect helps to promote the circulating flow of the sewage, and the circulating flow in turn helps to reduce the sludge deposition and caking phenomenon and keep the inside of the device clean and unobstructed.

[0015] Preferably, there are two groups of aeration discs, and the two groups of aeration discs are respectively located on the first air outlet section and the second air outlet section. One group of aeration discs located on the first air outlet section are evenly distributed along the circumferential direction of the first air outlet section, and one group of aeration discs located on the first air outlet section are all communicated with the first air outlet section. One group of aeration discs located on the second air outlet section are evenly distributed along the circumferential direction of the second air outlet section, and one group of aeration discs located on the second air outlet section are all communicated with the second air outlet section.

[0016] Through the above technical solution, the dissolved oxygen concentration in the aerobic zone is more efficiently increased by the two groups of aeration discs, and the dissolved oxygen is more evenly distributed.

[0017] Preferably, the support member is provided with a nuclear pore membrane immobilized microbial filler.

[0018] Through the above technical solution, as the sewage gradually increases and through micro-power, the sewage passes through the nuclear pore membrane immobilized microbial filler. The nuclear pore membrane has a unique pore size structure and excellent filtration performance. By passing the sewage through the nuclear pore membrane, microorganisms can be effectively intercepted while allowing water molecules and dissolved substances to pass through, thus realizing the effective contact and separation of microorganisms and sewage; the microorganisms are located on the nuclear pore membrane, forming an immobilized microbial layer, preventing the microorganisms from floating and affecting the reaction effect, thereby improving the tolerance of microorganisms to toxic substances and the degradation ability of organic matter, and keeping the microorganisms highly active and stable during the sewage treatment process.

[0019] Preferably, an effluent weir is further provided in the guiding cylinder. The effluent weir includes a weir body and an overflow tank. The overflow tank is sleeved on the weir body. The outer wall of the overflow tank is connected to the guiding cylinder, and the outlet pipe is communicated with the bottom of the overflow tank.

[0020] Through the above technical solution, as the supernatant increases and the water level rises to the overflow height of the weir body, the supernatant overflows to the overflow tank through the weir body, and a stable effluent water level is maintained through the effluent weir, accurately controlling the flow rate and ensuring the balance of the operation of the treatment system.

[0021] Compared with the prior art, the present utility model has the following beneficial effects:

[0022] The combined construction method of the anoxic zone, aerobic zone and inner cylinder breaks the traditional AO process of independently arranging the anoxic tank, aerobic tank and sedimentation tank in the horizontal or vertical direction. The three are organically combined through the combined construction method, which helps to reduce the floor area, and through sedimentation in the inner cylinder, it automatically flows back to the anoxic zone, thus ensuring the microbial content in the anoxic zone and being beneficial to improving the sewage treatment efficiency;

[0023] The micro-power generated by the air-lift effect helps to drive the sewage to circulate inside the device, enhancing the contact between the sewage and microorganisms and further improving the reaction efficiency; the micro-power cycle can promote the uniform distribution of dissolved oxygen and nutrients in the sewage, improving the metabolic rate and degradation efficiency of microorganisms; at the same time, the circulating flow also helps to reduce sludge deposition and caking phenomena, keeping the inside of the device clean and unobstructed;

[0024] The nuclear pore membrane has a unique pore size structure and excellent filtration performance. When sewage passes through the nuclear pore membrane, microorganisms can be effectively intercepted, while water molecules and dissolved substances are allowed to pass through, thereby achieving the effective contact and separation of microorganisms and sewage. The microorganisms are located on the nuclear pore membrane, forming an immobilized microbial layer, preventing the free movement of microorganisms from affecting the reaction effect, thereby improving the tolerance of microorganisms to toxic substances and the degradation ability of organic matter, and maintaining the high-efficiency and stable activity of microorganisms during the sewage treatment process. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of the inner cylinder in the embodiment of the present invention.

[0028] Figure 3 It is a schematic diagram of the distribution of the aeration components in the embodiment of the present invention.

[0029] Figure 4 It is a schematic diagram of the structure of the flow-through channel in the embodiment of the present invention.

[0030] Figure 5 is Figure 4 an enlarged view of part A in

[0031] Among them, the component label descriptions are as follows: 1. Tank body; 2. Inner cylinder; 21. Circulation part; 22. Sedimentation part; 23. Separation part; 3. Support member; 4. Anoxic zone; 5. Inlet pipe; 6. Aerobic zone; 7. Aeration components; 71. Air delivery pipe; 711. Intake section; 712. First air outlet section; 713. Shunt section; 714. Second air outlet section; 72. Aeration disc; 8. Guide cylinder; 9. Flow-through channel; 10. Outlet pipe; 11. Sludge discharge pipe; 12. Nuclear pore membrane immobilized microbial filler; 13. Effluent weir; 131. Weir body; 132. Overflow tank. Detailed Embodiment

[0032] The following will combine the attached drawings in the embodiments of the present invention Figures 1 to 5, the technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.

[0033] A sewage treatment device, referring to Figure 1 , includes a cylindrical tank body 1, an inner cylinder body 2 arranged in the tank body 1, and a support member 3 sleeved on the inner cylinder body 2. The tank body 1 is distributed in the vertical direction, and the top end of the tank body 1 is open.

[0034] Referring to Figure 1 And Figure 2 , the inner cylinder body 2 includes a circulation part 21, a precipitation part 22, and a separation part 23 that are sequentially distributed from bottom to top. Among them, the circulation part 21 is in the shape of a circular straight cylinder, and the circulation part 21 is distributed along the length direction of the tank body 1. The bottom end of the circulation part 21 is communicated with the inside of the tank body 1; the precipitation part 22 is in the shape of a conical tube, and the precipitation part 22 is arranged to shrink from top to bottom, that is, the small-mouth end of the precipitation part 22 faces downward, and the large-mouth end of the precipitation part 22 faces upward. The small-mouth end of the precipitation part 22 is communicated with the top end of the circulation part 21; the separation part 23 is also in the shape of a circular straight cylinder, and the separation part 23 is distributed along the length direction of the tank body 1, and the bottom end of the separation part 23 is communicated with the large-mouth end of the precipitation part 22. The separation part 23 is close to the opening of the tank body 1; the circulation part 21, the precipitation part 22, and the separation part 23 are on the same central axis.

[0035] Referring to Figure 1 , the support member 3 is in the shape of an annular frame. The support member 3 is sleeved and fixed on the circulation part 21, and the support member 3 is close to the precipitation part 22. The outer ring of the support member 3 is connected to the inner wall of the tank body 1, so that the inner cylinder body 2 is supported in the tank body 1 through the support member 3, and the inner cylinder body 2 and the tank body 1 are on the same central axis.

[0036] Referring to Figure 1 , the bottom of the tank body 1 is an anoxic zone 4. A water inlet pipe 5 is penetrated through the side wall of the tank body 1, so that one end of the water inlet pipe 5 extends out of the tank body 1, and the other end extends into the tank body 1. The end of the water inlet pipe 5 outside the tank body 1 is connected to a sewage source, and the end of the water inlet pipe 5 inside the tank body 1 extends into the circulation part 21 and extends out from the bottom end of the circulation part 21. The end of the water inlet pipe 5 extending out of the circulation part 21 extends into the anoxic zone 4.

[0037] When sewage treatment is carried out, the sewage enters the tank body 1 through the water inlet pipe 5 and is located in the anoxic zone 4. The sewage undergoes denitrification reaction in the anoxic zone 4, so that the denitrifying bacteria in the anoxic zone use the organic matter in the sewage as a carbon source and react with the nitrogen-containing substances in the sewage to produce nitrogen gas, thereby completing nitrogen removal.

[0038] Continue to refer toFigure 1 , an aerobic zone 6 is also formed between the outer wall of the tank body 1 and the inner cylinder 2. The aerobic zone 6 is located above the anoxic zone 4. An aeration assembly 7 for increasing the dissolved oxygen content and providing micro-power is also provided in the aerobic zone 6, and the aeration assembly 7 is located below the support member 3. Thus, the aeration assembly 7 provides the required dissolved oxygen for the aerobic zone 6 to facilitate providing sufficient oxygen for aerobic bacteria, and the micro-power provided by the aeration assembly 7 helps to promote the circulation of sewage inside the device and enhance the contact and reaction efficiency between the sewage and microorganisms.

[0039] Specifically, referring to Figure 1 and Figure 3 , the aeration assembly 7 includes an air delivery pipe 71 arranged at the bottom of the aerobic zone 6 and an aeration disc 72 arranged on the air delivery pipe 71.

[0040] Referring to Figure 3 , the air delivery pipe 71 includes an air inlet section 711, a first air outlet section 712, a shunt section 713 and a second air outlet section 714. Among them, the air inlet section 711 is in a straight pipe shape, the air inlet section 711 is distributed along the width direction of the tank body 1, and the air inlet section 711 penetrates through the side wall of the tank body 1. One end of the air inlet section 711 located outside the tank body 1 is connected to a blower. The first air outlet section 712 is in a circular tubular shape, the first air outlet section 712 surrounds the circulation part 21, and the first air outlet section 712 is communicated with one end of the air inlet section 711 located inside the tank body 1. The shunt section 713 is in a straight pipe shape, and one end of the shunt section 713 is communicated with the first air outlet section 712; the second air outlet section 714 is also in a circular tubular shape and surrounds the circulation part 21, the other end of the shunt section is communicated with the second air outlet section 714, and the circle of the second air outlet section 714 is smaller than the circle of the first air outlet section 712, and the second air outlet section 714 and the first air outlet section 712 are on the same central axis. The blower enables the gas to enter the first air outlet section 712 through the air inlet section 711, and then enter the second air outlet section 714 through the shunt section 713.

[0041] Referring to Figure 1 and Figure 3 , the aeration disc 72 is a relatively mature technology in the prior art and will not be elaborated too much. Two groups of aeration discs 72 are provided, and the two groups of aeration discs 72 are respectively located on the first air outlet section 712 and the second air outlet section 714, and the number settings of the two groups of aeration discs 72 are not the same. One group of aeration discs 72 located on the first air outlet section 712 are equally spaced along the circumferential direction of the first air outlet section 712, and one group of aeration discs 72 located on the first air outlet section 712 are all communicated with the first air outlet section 712. One group of aeration discs 72 located on the second air outlet section 714 are equally spaced along the circumferential direction of the second air outlet section 714, and one group of aeration discs 72 located on the second air outlet section 714 are all communicated with the second air outlet section 714.

[0042] During aeration, air enters the first air outlet section 712 through the air inlet section 711 by means of a blower, and the oxygen source enters the aeration disc 72 on the first air outlet section 712. Aeration is carried out through the aeration disc 72, thereby increasing the oxygen concentration in the aerobic zone 6. Part of the oxygen in the first air outlet section 712 enters the second air outlet section 714 through the diversion section 713. Similarly, aeration is carried out through the aeration disc 72 on the second air outlet section 714, so as to more efficiently increase the dissolved oxygen concentration in the aerobic zone 6 through the two groups of aeration discs 72 and make the dissolved oxygen distribution more uniform. At the same time, the micro-power generated by the air-lift effect helps to promote the circulating flow of the sewage, and the circulating flow in turn helps to reduce sludge deposition and caking phenomena, keeping the inside of the device clean and unobstructed.

[0043] Refer to Figure 4 , a nuclear pore membrane immobilized microbial filler 12 is arranged inside the support member 3. As the sewage gradually increases and with the micro-power generated by the air-lift effect, the sewage passes through the nuclear pore membrane immobilized microbial filler 12. The nuclear pore membrane has a unique pore size structure and excellent filtration performance. By passing the sewage through the nuclear pore membrane, microorganisms can be effectively intercepted while allowing water molecules and dissolved substances to pass through, thus realizing the effective contact and separation between microorganisms and sewage; the microorganisms are located on the nuclear pore membrane, forming an immobilized microbial layer, preventing the free movement of microorganisms from affecting the reaction effect, thereby improving the tolerance of microorganisms to toxic substances and the degradation ability of organic matter, and keeping the microorganisms highly active and stable during the sewage treatment process.

[0044] Continue to refer to Figure 4 , the liquid passing through the nuclear pore membrane immobilized microbial filler 12 undergoes nitrification reaction, oxidation reaction, biological adsorption and degradation in the aerobic zone 6, that is, the microorganisms carry out nitrification reaction on organic substances, ammonia, nitrogen and nitrates to generate water, nitrogen, phosphorus-containing substances, etc., and remove the organic pollutants in the influent through oxidation decomposition, thus realizing the efficient degradation of pollutants such as organic substances, nitrogen and phosphorus.

[0045] As the sewage gradually increases, external air is introduced into the air inlet section 711 through a blower and enters the first air outlet section 712. Part of the oxygen in the first air outlet section 712 enters the second air outlet section 714 through the diversion section 713, so that the dissolved oxygen concentration in the aerobic zone 6 can be more efficiently increased through the two groups of aeration discs 72 and the dissolved oxygen distribution can be made more uniform. Moreover, the sewage generates micro-power through the air-lift effect, passes through the nuclear pore membrane immobilized microbial filler 12 for filtration, and undergoes reactions such as nitrification reaction, oxidation reaction, biological adsorption and degradation in the aerobic zone 6, realizing the efficient degradation of pollutants such as organic substances, nitrogen and phosphorus.

[0046] Refer to Figure 4 And Figure 5, a guiding cylinder 8 is also arranged inside the tank body 1. The guiding cylinder 8 is a cylinder, and the guiding cylinder 8 is distributed along the length direction of the tank body 1. The top end of the guiding cylinder 8 is communicated with the opening of the tank body 1. The diameter of the guiding cylinder 8 is smaller than the diameter of the separation part 23, and the guiding cylinder 8 and the separation part 23 are on the same central axis, and the bottom end of the guiding cylinder 8 extends into the separation part 23. Thus, a flow-through channel 9 is formed between the inner side of the separation part 23 and the outer side of the guiding cylinder 8, and the aerobic zone 6 allows sewage to flow through. Through the micro-power generated by the air-lift effect, it helps to push the sewage to flow upward, so that the sewage in the aerobic zone 6 flows from the flow-through channel 9 to the inner cylinder 2 and is located in the precipitation part 22 for precipitation, separating the mud and water. The supernatant that meets the standards is located in the guiding cylinder 8, and the sludge is precipitated in the precipitation area under the action of gravity and flows out to the anoxic zone 4 through the guidance of the precipitation part 22. The precipitation part 22 is beneficial to preventing sludge residue and better guiding the sludge to the anoxic zone 4.

[0047] Refer to Figure 4 And Figure 5 , a water outlet weir 13 is also arranged inside the guiding cylinder 8. The water outlet weir 13 includes a weir body 131 and an overflow tank 132. The weir body 131 is in the shape of an annular plate, and the overflow tank 132 is also annular. The overflow tank 132 is sleeved on the weir body 131, and the outer wall of the overflow tank 132 is fixedly connected to the guiding cylinder 8. Thus, as the supernatant increases and the water level rises to the overflow height of the weir body 131, the supernatant overflows to the overflow tank 132 through the weir body 131, maintaining a stable water outlet level through the water outlet weir 13, accurately controlling the flow rate, and ensuring the balance of the operation of the treatment system.

[0048] Refer to Figure 4 , a water outlet pipe 10 also penetrates through the side wall of the tank body 1. The water outlet pipe 10 is close to the top end of the tank body 1. The end of the water outlet pipe 10 located inside the tank body 1 extends into the guiding cylinder 8 and is communicated with the bottom of the overflow tank 132. Thus, the supernatant in the overflow tank 132 is discharged through the water outlet pipe 10. Part of the sludge in the precipitation part 22 flows through the circulation part 21 and returns to the anoxic zone 4 under the action of gravity as nitrification liquid, improving the carbon removal and denitrification removal efficiency of the system, having a large volume load and a small head loss, enabling low-power circulation, and reducing the energy consumption of the equipment.

[0049] Continue to refer to Figure 4 , a sludge discharge pipe 11 also penetrates through the side wall of the tank body 1. The sludge discharge pipe 11 is close to the water inlet pipe 5 and is located above the water inlet pipe 5. The end of the sludge discharge pipe 11 located inside the tank body 1 extends into the circulation part 21, so that part of the sludge is regularly discharged through the sludge discharge pipe 11.

[0050] The implementation principle of this application is as follows: When treating sewage, the sewage enters the anoxic zone 4 through the inlet pipe 5. The sewage undergoes denitrification reaction in the anoxic zone 4, enabling the denitrifying bacteria in the anoxic zone to utilize the organic matter in the sewage as a carbon source and react with the nitrogen-containing substances in the sewage to produce nitrogen gas, thus completing nitrogen removal. As the sewage gradually increases, external air is introduced into the intake section 711 through a blower and enters the first outlet section 712. Part of the oxygen in the first outlet section 712 enters the second outlet section 714 through the diversion section 713, and then the dissolved oxygen concentration in the aerobic zone 6 can be more efficiently increased through the two groups of aeration disks 72, and the dissolved oxygen distribution is made more uniform. Moreover, through the micro-power generated by the air-lift effect, the sewage passes through the nuclear pore membrane immobilized microbial filler 12 for filtration, and nitrification reaction, oxidation reaction, biological adsorption, degradation and other reactions occur in the aerobic zone 6, realizing the efficient degradation of pollutants such as organic matter, nitrogen and phosphorus. Among them, the nuclear pore membrane immobilized microbial filler 12 enables the microorganisms to maintain high-efficiency and stable activity during the sewage treatment process.

[0051] The micro-power generated by the air-lift effect helps to drive the sewage to circulate inside the device, enhancing the contact between the sewage and the microorganisms and further improving the reaction efficiency. The micro-power circulation can promote the uniform distribution of dissolved oxygen and nutrients in the sewage, increasing the metabolic rate and degradation efficiency of the microorganisms. At the same time, the circulating flow also helps to reduce sludge deposition and caking phenomena, keeping the inside of the device clean and unobstructed.

[0052] Then the sewage in the aerobic zone 6 flows from the overflow channel 9 to the inner cylinder 2 and is located in the sedimentation section 22 for sedimentation to separate the mud and water. The supernatant that meets the discharge standard is located in the guiding cylinder 8. As the supernatant increases and the water level rises to the overflow height of the weir body 131, the supernatant overflows through the weir body 131 to the overflow tank 132, and a stable effluent water level is maintained through the effluent weir 13, and the flow rate is accurately controlled to ensure the balance of the operation of the treatment system. The supernatant in the overflow tank 132 is discharged through the outlet pipe 10.

[0053] The sludge is precipitated in the sedimentation area under the action of gravity and flows out from the circulation section 21 to the anoxic zone 4 through the guidance of the sedimentation section 22. The sedimentation section 22 is beneficial to preventing sludge residue and better guiding the sludge to the anoxic zone 4. Sedimentation is carried out through the inner cylinder 2, thus eliminating the need for an additional driving source and enabling the sludge to automatically flow back to the anoxic zone 4, thereby ensuring the microbial content in the anoxic zone 4 and further ensuring the treatment efficiency of the sewage in the anoxic zone 4. Finally, part of the sludge is regularly discharged through the sludge discharge pipe 11.

[0054] In summary, the combined construction method of the anoxic zone 4, the aerobic zone 6 and the inner cylinder 2 breaks the traditional AO process of independently arranging the anoxic tank, the aerobic tank and the sedimentation tank in the horizontal or vertical direction. The three are organically combined through the combined construction method, which helps to reduce the floor area. And through the setting of the inner cylinder 2, sedimentation is carried out through the inner cylinder 2, so that no additional driving source is required, and the sludge automatically flows back to the anoxic zone 4, thereby ensuring the microbial content in the anoxic zone 4 and being beneficial to improving the sewage treatment efficiency.

[0055] As described above, the above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A sewage treatment device, comprising a tank body (1), characterized in that: An inner cylinder (2) is arranged inside the tank body (1), a support member (3) is sleeved on the inner cylinder (2), and the support member (3) is connected to the tank body (1); the bottom of the tank body (1) is an anoxic zone (4), a water inlet pipe (5) penetrates through the tank body (1), and one end of the water inlet pipe (5) located inside the tank body (1) extends into the anoxic zone (4); an aerobic zone (6) is formed between the outer wall of the tank body (1) and the inner cylinder (2), the aerobic zone (6) is located above the anoxic zone (4), and an aeration assembly (7) for increasing the dissolved oxygen content and providing micro-power is arranged in the aerobic zone (6); a guiding cylinder (8) is further arranged at the top end of the tank body (1), the guiding cylinder (8) extends into the top end of the inner cylinder (2), and a flow-through channel (9) for sewage to flow through is formed between the inner cylinder (2) and the guiding cylinder (8); a water outlet pipe (10) further penetrates through the tank body (1), one end of the water outlet pipe (10) located inside the tank body (1) extends into the guiding cylinder (8), and a sludge discharge pipe (11) penetrates through the tank body (1), and one end of the sludge discharge pipe (11) located inside the tank body (1) extends into the inner cylinder (2) and is close to the anoxic zone (4).

2. The sewage treatment device according to claim 1, wherein: The inner cylinder (2) includes a circulation part (21), a precipitation part (22), and a separation part (23) which are distributed in sequence from bottom to top. The bottom end of the circulation part (21) is communicated with the inside of the tank body (1); the precipitation part (22) is arranged to shrink from top to bottom, the small-mouth end of the precipitation part (22) is communicated with the top end of the circulation part (21), the bottom end of the separation part (23) is communicated with the large-mouth end of the precipitation part (22), and the bottom end of the guiding cylinder (8) extends into the separation part (23).

3. A sewage treatment device according to claim 1, characterized in that: The aeration assembly (7) includes an air delivery pipe (71) and an aeration disc (72) arranged on the air delivery pipe (71); the air delivery pipe (71) includes an air inlet section (711), a first air outlet section (712), a shunt section (713), and a second air outlet section (714); the air inlet section (711) penetrates through the tank body (1), one end of the air inlet section (711) located outside the tank body (1) is connected to a blower, the first air outlet section (712) is communicated with one end of the air inlet section (711) located inside the tank body (1), both ends of the shunt section (713) are correspondingly communicated with the first air outlet section (712) and the second air outlet section (714), and the first air outlet section (712) surrounds the second air outlet section (714), the second air outlet section (714) and the first air outlet section (712) are on the same central axis, and the aeration disc (72) is arranged on the first air outlet section (712) and the second air outlet section (714).

4. A sewage treatment device according to claim 3, characterized in that: The aeration discs (72) are provided in two groups. The two groups of aeration discs (72) are respectively located on the first air outlet section (712) and the second air outlet section (714). One group of aeration discs (72) located on the first air outlet section (712) are equally spaced along the circumferential direction of the first air outlet section (712). One group of aeration discs (72) located on the first air outlet section (712) are all communicated with the first air outlet section (712). One group of aeration discs (72) located on the second air outlet section (714) are equally spaced along the circumferential direction of the second air outlet section (714), and one group of aeration discs (72) located on the second air outlet section (714) are all communicated with the second air outlet section (714).

5. A sewage treatment device according to claim 1, characterized in that: The support member (3) is internally provided with a nuclear pore membrane immobilized microbial filler (12).

6. The sewage treatment device according to claim 1, characterized in that: An effluent weir (13) is further arranged in the guiding cylinder (8). The effluent weir (13) includes a weir body (131) and an overflow tank (132). The overflow tank (132) is sleeved on the weir body (131). The outer wall of the overflow tank (132) is connected to the guiding cylinder (8). The water outlet pipe (10) is communicated with the bottom of the overflow tank (132).

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