Micro-power sewage treatment device

Abstract

The utility model provides a micro-power sewage treatment device which comprises a water tank, an anaerobic tank, an anoxic tank, an aerobic sedimentation tank and a pre-anoxic tank are sequentially arranged in the water tank, the anaerobic tank is communicated with the anoxic tank, and the anoxic tank is communicated with the aerobic sedimentation tank; a water inlet pipe penetrates through the water tank; one end of the water inlet pipe is communicated with the anaerobic tank; a sludge bucket is arranged at the bottom of the aerobic sedimentation tank, an aeration assembly for aeration is arranged on one side of the sludge bucket, a three-phase separator for separating sludge, clear liquid and gas is arranged on the top side of the aeration assembly, a sludge discharge pipe is arranged on the side wall of the water tank in a penetrating mode, and the end, located in the water tank, of the sludge discharge pipe extends into the sludge bucket. A water outlet pipe is arranged on the water tank in a penetrating manner, one end of the water outlet pipe extends into the aerobic sedimentation tank and is positioned on the top side of the three-phase separator, and a communicating pipe for communicating the pre-anoxic tank with the anoxic tank is also arranged on the water tank. The sewage treatment device has the advantages of low energy consumption and good sewage treatment effect.

Description

Technical Field

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

[0002] Traditional sewage treatment processes, including the AAO (Anaerobic-Anoxic-Oxic) process, are widely used in the sewage treatment field and are mainly used for secondary or tertiary sewage treatment and reclaimed water reuse.

[0003] To facilitate wastewater treatment using the AAO process, researchers have developed related wastewater treatment devices. For example, the utility model with authorized publication number CN210974085U relates to an AAO process biochemical reaction tank, comprising an anaerobic tank, an anaerobic denitrification tank, a solidified carrier aeration tank, and a clear water tank. The anaerobic tank is equipped with a first water pump, whose outlet is connected to a water pipe. The end of the water pipe, remote from the first water pump, extends into the anaerobic denitrification tank. The anaerobic denitrification tank and the solidified carrier aeration tank are connected by a pipeline. The solidified carrier aeration tank is equipped with a micro-aeration pipe, one end of which is equipped with an aeration blower. The solidified carrier aeration tank is equipped with a second water pump, whose outlet is connected to a nitrification liquid return pipe. The end of the nitrification liquid return pipe, remote from the second water pump, extends into the anaerobic denitrification tank. The clear water tank is connected to the solidified carrier aeration tank near its upper end via a pipeline. During sewage treatment, the sewage is introduced into the anaerobic tank and reacted with anaerobic bacteria. Then, the sewage in the anaerobic tank is transported to the heterotrophic denitrification tank through the No. 1 water pump for denitrification reaction. Then, the sewage flows into the solidified carrier aeration tank and the micro-aeration pipe is aerated by the aeration blower. The anaerobic tank, heterotrophic denitrification tank and solidified carrier aeration tank constitute an anaerobic hydrolysis acidification-heterotrophic denitrification-autotrophic nitrification water treatment system. The treated water is stored in the clear water tank and finally transported to the place where it is needed.

[0004] However, when using sewage treatment equipment in related technologies, the operation of equipment such as water pump No. 1 and water pump No. 2 requires continuous consumption of electricity, and the equipment has high energy consumption, which makes the overall operating costs high. Utility Model Content

[0005] In order to improve the problem that existing equipment has high energy consumption and thus high overall operating costs, the utility model provides a sewage treatment device with low energy consumption and good sewage treatment effect.

[0006] The utility model provides a micro-power sewage treatment device, which adopts the following technical solutions:

[0007] A micro-powered sewage treatment device comprises a water tank, wherein an anaerobic tank, an anoxic tank, an aerobic sedimentation tank and a pre-anoxic tank are sequentially provided in the water tank, wherein the anaerobic tank is connected to the anoxic tank, and the anoxic tank is connected to the aerobic sedimentation tank; a water inlet pipe is passed through the water tank, and one end of the water inlet pipe is connected to the anaerobic tank;

[0008] A mud hopper is provided at the bottom of the aerobic sedimentation tank, an aeration assembly for aeration is provided on one side of the mud hopper, a three-phase separator for separating sludge, clear liquid and gas is provided on the top side of the aeration assembly, a mud discharge pipe is passed through the side wall of the water tank, the mud discharge pipe is located at one end of the water tank and extends into the mud hopper, the three-phase separator includes an air collecting hood, the air collecting hood is provided with a conduit, the conduit connects the air collecting hood with the pre-anoxic tank, an outlet pipe is passed through the water tank, one end of the outlet pipe extends into the aerobic sedimentation tank and is located on the top side of the three-phase separator, and a connecting pipe connecting the pre-anoxic tank with the anoxic tank is also provided on the water tank.

[0009] Through the above technical solution, during sewage treatment, the sewage is introduced into the water inlet pipe, and then enters the anaerobic tank through the water inlet pipe. In the absence of oxygen, the organic matter in the sewage is degraded by anaerobic bacteria into volatile organic matter such as organic acids and acetic acid, and a large amount of nitrate is produced in the process. At the same time, the ammonia nitrogen in the sewage is converted into nitrate by ammonia-oxidizing bacteria, and polyphosphate microorganisms (such as polyphosphate bacteria) will release phosphorus to meet the bacteria's demand for phosphorus.

[0010] The sewage in the anaerobic tank then flows into the anoxic tank. Under the condition of lack of oxygen, the nitrate in the wastewater is reduced to nitrogen gas by denitrifying bacteria, thus achieving denitrification.

[0011] Then the sewage in the anoxic tank flows into the aerobic sedimentation tank and is aerated through the aeration component, thereby increasing the dissolved oxygen concentration at the bottom of the aerobic sedimentation tank. Under oxygen conditions, organic matter and ammonia nitrogen in the wastewater are utilized by aerobic bacteria and converted into carbon dioxide, water, and nitrates through oxidation reactions. At the same time, micro-power is generated through the air lift effect, which promotes the circulation of sewage inside the device, enhancing the contact and reaction efficiency between sewage and microorganisms.

[0012] Then the sludge is isolated at the bottom of the three-phase separator through a three-phase separator, the clear liquid is filtered to the clarification area, and the gas is collected in the gas collecting hood. The gas is collected by the gas collecting hood to form gas lift. The gas lift combined with the micro-power provided by the aeration component drives the sewage in the aerobic zone to flow through the conduit to the pre-anoxic tank. The oxygen in the sewage is continuously consumed by aerobic bacteria, so that the sewage in the pre-anoxic tank is converted into nitrified liquid, and the nitrified liquid is returned to the anoxic tank from the connecting pipe through the gravitational potential energy and the micro-power of the aeration component.

[0013] The micro-power generated by the aeration component can drive the sewage to circulate inside the device without the need for other energy consumption, making the equipment energy consumption low. Combined with the pre-anoxic tank, the sewage treatment effect is better.

[0014] Preferably, a filter screen is provided in the water inlet pipe.

[0015] Through the above technical solution, when water is entering, sewage is passed into the water inlet pipe, and the sewage enters the anaerobic tank through the water inlet pipe, and particles or impurities in the sewage are intercepted by the filter net, thereby conveniently removing particles or impurities in the sewage.

[0016] Preferably, a stirrer is provided at the bottom of the anaerobic tank, and the stirrer is inclined.

[0017] Through this technical solution, the inclined blades can more effectively guide fluid flow, reduce dead zones, and enhance mixing. The mixer effectively agitates the sewage in the anaerobic tank, thereby improving the contact efficiency of microorganisms. At the same time, it prevents sludge sedimentation and the formation of a sludge layer, maintaining fluidity within the tank and ensuring improved overall anaerobic treatment efficiency.

[0018] Preferably, the anoxic tank, anaerobic tank and aerobic sedimentation tank are at the same height of the water tank, and the anoxic tank, anaerobic tank and aerobic sedimentation tank are at the same height, the top side of the anaerobic tank is connected to the bottom side of the anoxic tank, and the top side of the anoxic tank is connected to the bottom side of the aerobic sedimentation tank.

[0019] Through the above technical solution, as the sewage reacts in the anaerobic tank and completes dephosphorization, and as the water level continues to rise, the sewage in the anaerobic tank flows from the top side of the anaerobic tank to the bottom side of the anoxic tank. Then, as the sewage reacts in the anoxic tank and completes denitrification, as the water level continues to rise, the sewage in the anoxic tank flows into the aerobic sedimentation tank through the No. 2 connecting tank, thereby preventing sewage backflow.

[0020] Preferably, a NIM component is provided in the anoxic tank, and the NIM component includes a frame and a nuclear pore membrane-immobilized microbial filler provided on the frame.

[0021] Through the above technical solution, the nuclear pore membrane immobilized microbial filler is set on the support part. The nuclear pore membrane immobilized microbial filler has a unique pore structure and excellent filtration performance. It can effectively intercept microorganisms and allow water molecules and soluble substances to pass through smoothly. At the same time, the microorganisms are fixed on the nuclear pore membrane to form a stable immobilized microbial layer, ensuring sufficient contact and efficient separation between the microorganisms and the sewage. The immobilized microbial layer not only improves the microorganisms' tolerance to toxic substances, but also enhances their ability to degrade organic matter, allowing the microorganisms to maintain efficient and stable activity during the sewage treatment process. When the sewage enters the anoxic tank, in the absence of oxygen, the nitrate in the wastewater is reduced to nitrogen gas by denitrifying bacteria, achieving denitrification. At the same time, due to the presence of organic matter under anoxic conditions, these organic matter will also be further degraded.

[0022] Preferably, the frame is made of stainless steel.

[0023] Through the above technical solution, the stainless steel material has the advantages of corrosion resistance and excellent mechanical strength, so the frame can maintain structural integrity during the processing.

[0024] Preferably, the aeration assembly includes an aeration pipe and an aeration plate arranged on the aeration pipe, the aeration pipe includes an air supply section and an air outlet section, the air supply section is passed through the water tank, and one end of the air supply section is located in the aerobic sedimentation tank, the air outlet section is connected to one end of the air supply section located in the aerobic sedimentation tank, the aeration plate is connected to the air outlet section, and the end of the air supply section located outside the water tank is connected to a blower.

[0025] Through the above technical solution, during aeration, the blower compresses the external air and transports it to the air transmission section. The air enters the air outlet section through the air transmission section and is aerated through the aeration disk, thereby increasing the dissolved oxygen concentration in the aerobic zone and generating micro-power through the air lift effect, so as to promote the circulation of sewage inside the device and enhance the contact and reaction efficiency between sewage and microorganisms.

[0026] Preferably, five of the aeration plates form a group, and the five aeration plates in a group are evenly spaced along the length direction of the air outlet section. There are three air outlet sections, and the three air outlet sections are consistent and evenly spaced along the length direction of the gas transmission section. There are three groups of aeration plates corresponding to the number of air outlet sections, and the three groups of aeration plates are arranged one by one on the three air outlet sections.

[0027] Through the above technical solution, three sets of aeration disks are used to efficiently increase the dissolved oxygen concentration and distribute it more evenly, while providing greater micro-power.

[0028] Preferably, an overflow weir is provided on the top side of the three-phase separator, and the overflow weir includes a weir body and an overflow trough sleeved on the weir body, the outer wall of the overflow trough is connected to the side wall of the aerobic sedimentation tank, and one end of the outlet pipe extending into the aerobic sedimentation tank is connected to the overflow trough.

[0029] Through the above technical solution, when the three-phase separator separates the clear liquid to its top side, as the clear liquid increases, the water level rises to the overflow height of the weir body, and the clear liquid overflows through the weir body into the overflow trough and is discharged through the outlet pipe, thereby maintaining a stable outlet water level through the overflow weir, accurately controlling the flow rate, and ensuring the balanced operation of the treatment system.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The aeration component generates micro-power to promote the circulation of sewage inside the device, without the need for other energy consumption, making the equipment energy consumption low. Combined with the pre-anoxic tank, the sewage treatment effect is better.

[0032] Since the presence of nitrates will inhibit the activity of anaerobic bacteria, nitrates are reduced to nitrogen gas, which helps to improve the denitrification efficiency of the subsequent anoxic zone. The nitrate content in the returned nitrification liquid is reduced, preventing the liquid from the anoxic tank from flowing back to the anaerobic tank and affecting the phosphorus removal effect. The return of nitrification liquid can improve the carbon removal and denitrification removal efficiency of the system.

[0033] Combining the aerobic process and the sedimentation process in the same tank can improve space utilization and reduce floor space. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0036] Figure 2 It is a cross-sectional view of a water tank according to an embodiment of the present utility model.

[0037] Figure 3 It is a schematic diagram of the aerobic zone and the clarification zone in the embodiment of the present utility model.

[0038] Figure 4 It is a schematic diagram of the No. 1 connecting groove and the No. 2 connecting groove in the embodiment of the utility model.

[0039] Figure 5It is a schematic diagram of the structure of the aeration tube and the aeration plate in the embodiment of the utility model.

[0040] Figure 6 It is a top view of the three-phase separator in the embodiment of the present utility model.

[0041] Figure 7 It is a structural diagram of a three-phase separator in an embodiment of the present utility model.

[0042] Among them, the parts number description is: 1. Water tank; 2. Anaerobic tank; 3. Anoxic tank; 4. Aerobic sedimentation tank; 41. Aerobic zone; 42. Clarification zone; 5. Pre-anoxic tank; 6. Water inlet pipe; 7. Mud hopper; 8. Three-phase separator; 81. Gas collecting hood; 82. Separation part; 9. Overflow weir; 91. Weir body; 92. Overflow trough; 10. Mud discharge pipe; 11. Conduit; 12. Outlet pipe; 13. Connecting pipe; 14. Mixer; 15. Frame; 16. Nuclear pore membrane immobilized microbial filler; 17. Aeration pipe; 171. Gas transmission section; 172. Gas outlet section; 18. Aeration plate; 19. Connecting tank No. 1; 20. Connecting tank No. 2. DETAILED DESCRIPTION

[0043] The following is a combination of the appended examples of the present invention Figures 1 to 7 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] A micro-powered sewage treatment device, referring to Figure 1 , comprising a rectangular water tank 1, in which an anaerobic tank 2, an anoxic tank 3, an aerobic sedimentation tank 4 and a pre-anoxic tank 5 are sequentially opened along the length direction of the water tank 1.

[0045] Reference Figure 1 and Figure 2The anaerobic tank 2 is rectangular and extends along the width of the water tank 1 and along the height of the water tank 1. An inlet pipe 6 is provided at one end of the water tank 1. The inlet pipe 6 is a circular pipe and extends along the length of the water tank 1. One end of the inlet pipe 6 is connected to the side wall of the anaerobic tank 2 and is close to the top of the anaerobic tank 2. A filter is provided in the inlet pipe 6. The filter is used to filter particles or impurities. The filter is circular. When water is introduced, sewage is passed into the inlet pipe 6. The sewage enters the anaerobic tank 2 through the inlet pipe 6, and the particles or impurities in the sewage are intercepted by the filter. In the absence of oxygen, the organic matter in the sewage is degraded by anaerobic bacteria into volatile organic compounds such as organic acids and acetic acid, and a large amount of nitrate is produced in the process. At the same time, the ammonia nitrogen in the sewage is converted into nitrate by ammonia-oxidizing bacteria, and polyphosphate microorganisms (such as polyphosphate bacteria) release phosphorus to meet the bacteria's demand for phosphorus.

[0046] In addition, refer to Figure 1 and Figure 2 A stirrer 14 is also installed at the bottom of the anaerobic tank 2. This stirrer 14 is a relatively mature technology in the prior art and will not be described in detail here. In this embodiment, the blades of stirrer 14 are inclined. These inclined blades can more effectively guide fluid flow, reduce dead zones, and enhance mixing. Stirrer 14 effectively stirs the sewage in the anaerobic tank 2, thereby improving the contact efficiency of microorganisms. It also prevents sludge precipitation, avoids the formation of a sludge layer, and maintains fluidity within the tank, thereby ensuring improved overall anaerobic reaction efficiency.

[0047] Reference Figure 3 and Figure 4 The anoxic tank 3 is also rectangular. Similarly, the anoxic tank 3 is distributed along the width direction of the water tank 1 and extends along the height direction of the water tank 1. The anoxic tank 3 and the anaerobic tank 2 are at the same height of the water tank 1 and the anoxic tank 3 and the anaerobic tank 2 are at the same height. A connecting groove 19 is provided in the water tank 1. The connecting groove 19 is long and distributed along the width direction of the water tank 1 and extends along the height direction of the water tank 1. In addition, the connecting groove 19 is connected to the top side of the anaerobic tank 2 and the bottom side of the anoxic tank 3. As the sewage completes the reaction in the anaerobic tank 2 and as the water level continues to rise, the sewage in the anaerobic tank 2 flows into the anoxic tank 3 through the connecting groove 19, thereby preventing backflow.

[0048] During sewage treatment, the sewage is introduced into the water inlet pipe 6, and the sewage enters the anaerobic tank 2 through the water inlet pipe 6. The particles or impurities in the sewage are intercepted by the filter screen, and the sewage and sludge are effectively mixed by the mixer 14. As the sewage anaerobic tank 2 completes the reaction and phosphorus removal, and as the water level continues to rise, the sewage in the anaerobic tank 2 flows into the anoxic tank 3 through the No. 1 connecting groove 19 and reacts in the anoxic tank 3.

[0049] Continue to refer to Figure 3 and Figure 4 The anoxic tank 3 is provided with a NIM assembly, which includes a frame 15 and a nuclear pore membrane-immobilized microbial filler 16 disposed on the frame 15. The frame 15 includes a hook portion and a rectangular support portion. The hook portion is located at one end of the support portion and is hung on the top side of the anoxic tank 3, so that the support portion is distributed along the height direction of the water tank 1. The frame 15 is made of stainless steel. Stainless steel has advantages such as corrosion resistance and excellent mechanical strength. Therefore, the frame 15 can maintain structural integrity during the treatment process.

[0050] The nucleus pore membrane immobilized microbial filler 16 is arranged on the support portion. The nucleus pore membrane immobilized microbial filler 16 has a unique pore structure and excellent filtration performance, which can effectively intercept microorganisms and allow water molecules and soluble substances to pass smoothly. At the same time, the microorganisms are fixed on the nucleus pore membrane to form a stable immobilized microbial layer, ensuring sufficient contact and efficient separation between the microorganisms and the sewage. The immobilized microbial layer not only improves the tolerance of microorganisms to toxic substances, but also enhances their ability to degrade organic matter, allowing the microorganisms to maintain efficient and stable activity during the sewage treatment process. When the sewage enters the anoxic tank 3, in the absence of oxygen, the nitrate in the wastewater is reduced to nitrogen gas by denitrifying bacteria to achieve denitrification. At the same time, due to the presence of organic matter under anoxic conditions, these organic matter will also be further degraded.

[0051] Reference Figure 4 and Figure 5 Two groups of NIM components are provided, and the two groups of NIM components are arranged along the width direction of the water tank 1, and the two groups of NIM components are consistent. The two groups of NIM components are conducive to further increasing the contact area between microorganisms and sewage, thereby making the reaction faster and more effective.

[0052] Continue to refer to Figure 4 The aerobic sedimentation tank 4 is also rectangular. Similarly, the aerobic sedimentation tank 4 is distributed along the width direction of the water tank 1 and extends along the height direction of the water tank 1. The aerobic sedimentation tank 4 and the anoxic tank 3 are at the same height of the water tank 1 and the aerobic sedimentation tank 4 and the anoxic tank 3 are at the same height. A second connecting groove 20 is also provided in the water tank 1. The second connecting groove 20 is also long and rectangular. The second connecting groove 20 is distributed along the width direction of the water tank 1 and extends along the height direction of the water tank 1. In addition, the second connecting groove 20 is connected to the top side of the anoxic tank 3 and the bottom side of the aerobic sedimentation tank 4. As the sewage completes denitrification in the anoxic tank 3 and as the water level continues to rise, the sewage in the anoxic tank 3 flows into the aerobic sedimentation tank 4 through the second connecting groove 20.

[0053] During sewage treatment, the sewage is introduced into the inlet pipe 6, through which it enters the anaerobic tank 2. Particles and impurities in the sewage are intercepted by the filter. As the reaction in the anaerobic tank 2 completes and the water level continues to rise, the sewage in the anaerobic tank 2 flows into the anoxic tank 3 through the first connecting trough 19. There, the sewage undergoes denitrification. Similarly, as the water level continues to rise, the sewage in the anoxic tank 3 flows into the aerobic sedimentation tank 4 through the second connecting trough 20. There, an oxidation reaction occurs, converting organic matter and ammonia nitrogen into carbon dioxide, water, and nitrates, and separating the muddy and watery substances.

[0054] Replay Figure 3 The aerobic sedimentation tank 4 is provided with a three-phase separator 8, which is connected to the side wall of the aerobic sedimentation tank 4. The distance between the three-phase separator 8 and the bottom of the aerobic sedimentation tank 4 is greater than the distance between the three-phase separator 8 and the top of the aerobic sedimentation tank 4. The three-phase separator 8 divides the aerobic sedimentation tank 4 into an aerobic zone 41 and a clarification zone 42. The aerobic zone 41 is between the three-phase separator 8 and the bottom of the aerobic sedimentation tank 4, and the clarification zone 42 is between the three-phase separator 8 and the top of the aerobic sedimentation tank 4.

[0055] Reference Figure 2 and Figure 5 The bottom of the aerobic sedimentation tank 4 (i.e., the aerobic zone 41) is provided with an aeration assembly, which includes an aeration pipe 17 and an aeration plate 18 provided on the aeration pipe 17. The aeration pipe 17 includes an air supply section 171 and an air outlet section 172. Both the air supply section 171 and the air outlet section 172 are straight circular tubes. The air supply section 171 is distributed along the width of the water tank 1 and penetrates the water tank 1. One end of the air supply section 171 is located in the aerobic sedimentation tank 4, and the other end is located outside the water tank 1. The air outlet section 172 is connected to the end of the air supply section 171 located in the aerobic sedimentation tank 4. The end of the air supply section 171 located outside the water tank 1 is connected to a blower, which is used to compress external air and deliver it into the aeration pipe 17.

[0056] Reference Figure 2 and Figure 5 The air outlet sections 172 are distributed along the length of the water tank 1, with one end of each section connected to the air supply section 171. In this embodiment, three air outlet sections 172 are provided, and the three air outlet sections 172 are uniform and evenly spaced along the length of the air supply section 171. Aeration discs 18 are provided in three groups corresponding to the number of air outlet sections 172, with each group consisting of five aeration discs 18. The three groups of aeration discs 18 are correspondingly disposed on the three air outlet sections 172. The five aeration discs 18 within a group are evenly spaced along the length of the air outlet section 172, and all five aeration discs 18 within a group are connected to the air outlet section 172.

[0057] During aeration, the blower compresses external air and delivers it to the air delivery section 171. The air then enters the three air outlet sections 172 through this section and is aerated by three sets of aeration discs 18, thereby increasing the dissolved oxygen concentration in the aerobic zone 41. This airlift generates micro-dynamic forces, which propel the wastewater through circulation within the device, enhancing contact and reaction efficiency between the wastewater and microorganisms. The three sets of aeration discs 18 effectively increase the dissolved oxygen concentration and achieve a more even distribution. In the presence of oxygen, the organic matter and ammonia nitrogen in the wastewater flowing from the anoxic zone into the aerobic zone 41 are utilized by aerobic bacteria, who, through oxidation reactions, convert them into carbon dioxide, water, and nitrates.

[0058] Reference Figure 6 and Figure 7 The three-phase separator 8 includes a separation portion 82 for separating sludge, clear liquid and gas, and gas collecting hoods 81 arranged on both sides of the separation portion 82. The gas collecting hoods 81 are rectangular and distributed along the length direction of the water tank 1. The two gas collecting hoods 81 are opposite to each other along the width direction of the water tank 1. Figure 3 After the sewage completes the reaction in the aerobic zone 41, the sludge is isolated in the aerobic zone 41 through the separation section 82, the clear liquid is separated into the clarification zone 42 through the separation section 82, and the gas is collected in the gas collecting hoods 81 on both sides of the separation section 82.

[0059] Replay Figure 3 and Figure 5 The bottom of the aerobic sedimentation tank 4 (i.e., the aerobic zone 41) is also provided with a mud hopper 7. The mud hopper 7 is in the shape of an elongated strip and is distributed along the width direction of the water tank 1. The cross-section of the mud hopper 7 is a right-angled trapezoid. The lower bottom side of the mud hopper 7 faces the three-phase separator 8, and the upper bottom side of the mud hopper 7 is connected to the bottom of the aerobic sedimentation tank 4. A mud discharge pipe 10 is provided through the side wall of the water tank 1. One end of the mud discharge pipe 10 is located inside the water tank 1, and the other end is located outside the water tank 1. The mud discharge pipe 10 is located at one end of the water tank 1 and extends into the mud hopper 7. In this way, the sludge is isolated from the aerobic zone 41 by the separation portion 82, and the sludge above the aeration assembly is driven by the micro-power provided by the aeration assembly to continuously lift the sludge, squeezing the sludge to the top near the mud hopper 7. The sludge above the mud hopper 7 falls into the mud hopper 7 by gravity and is regularly discharged through the mud discharge pipe 10.

[0060] Replay Figure 2 and Figure 3An overflow weir 9 is provided near the top of the aerobic sedimentation tank 4 (i.e., the clarification zone 42). The overflow weir 9 comprises a weir body 91 and an overflow trough 92 sleeved on the weir body 91. The weir body 91 is in the shape of an upright plate and is arranged in a square shape. The outer wall of the overflow trough 92 is fixedly connected to the side wall of the aerobic sedimentation tank 4. An outlet pipe 12 is also provided at the end of the water tank 1 facing away from the water inlet pipe 6. The outlet pipe 12 is a circular straight pipe and extends along the length of the water tank 1. One end of the outlet pipe 12 passes through the pre-anoxic tank 5 and extends into the overflow trough 92. The end of the outlet pipe 12 extending into the overflow trough 92 is connected to the overflow trough 92, thereby conveniently discharging the clear liquid in the overflow trough 92 through the outlet pipe 12. When the three-phase separator 8 separates the clear liquid into the clarification zone 42, as the clear liquid increases, the water level rises to the overflow height of the weir 91, and the clear liquid overflows through the weir 91 into the overflow trough 92 and is discharged through the outlet pipe 12, thereby maintaining a stable outlet water level through the overflow weir 9, accurately controlling the flow rate, and ensuring the balanced operation of the treatment system.

[0061] During sewage treatment, a blower compresses external air and delivers it to the air delivery section 171. The air then enters the three air outlet sections 172 through the air delivery section 171 and is aerated by three sets of aeration discs 18, thereby increasing the dissolved oxygen concentration in the aerobic zone 41. Aerobic bacteria then oxidize the air into carbon dioxide, water, and nitrates. The sludge is then isolated in the aerobic zone 41 by the separation section 82, while the clear liquid is separated by the separation section 82 into the clarification zone 42. Gases are collected in the gas collection hoods 81 on both sides of the separation section 82. This combines the aerobic and sedimentation processes in the same tank, improving space utilization and reducing floor space.

[0062] Reference Figure 4 and Figure 7 The gas hood 81 is provided with a conduit 11. In this embodiment, the conduit 11 is a right-angle elbow and is located on the top side of the gas hood 81. One end of the conduit 11 is connected to the gas hood 81, and the other end of the conduit 11 is connected to the pre-anoxic tank 5. The gas is separated by the three-phase separator 8 and collected by the gas hood 81 to form a gas lift. The gas lift, combined with the micro-power provided by the aeration assembly, drives the sewage from the aerobic zone 41 through the conduit 11 to the pre-anoxic tank 5.

[0063] Reference Figure 3 and Figure 5The pre-anoxic tank 5 is rectangular and extends along the width and height of the water tank 1. A connecting pipe 13 is provided on the water tank 1. This connecting pipe 13 is a circular tube with a U-shaped configuration. It is located on one long side of the water tank 1 and near the bottom of the water tank 1. One end of the connecting pipe 13 extends into and connects to the pre-anoxic tank 5, while the other end extends into and connects to the anoxic tank 3. Two connecting pipes 13 are provided, facing each other along the width of the water tank 1. As sewage flows into the pre-anoxic tank 5, aerobic bacteria in the sewage continuously consume dissolved oxygen, reducing some nitrates to nitrogen gas. The alternating growth of aerobic and anaerobic microorganisms allows each microorganism to perform optimally in a suitable environment, converting the sewage into a nitrified liquid. The nitrified liquid then flows back through the connecting pipe 13 to the anoxic tank 3 through gravitational potential energy and micro-dynamics.

[0064] When the gas is separated by three-phase separator 8 and transferred to gas collection hood 81, it is collected by gas collection hood 81 to form a gas lift. This gas lift, combined with the micro-power provided by the aeration assembly, drives the sewage from aerobic zone 41 through conduit 11 to pre-anoxic tank 5. Aerobic bacteria continuously consume the oxygen in the sewage, converting the sewage in pre-anoxic tank 5 into a nitrified liquid. The nitrified liquid then flows back through connecting pipe 13 to anoxic tank 3 due to gravitational potential energy and the micro-power provided by the aeration assembly. Because the presence of nitrate inhibits the activity of anaerobic bacteria, nitrate is reduced to nitrogen gas, which helps improve the denitrification efficiency of the subsequent anoxic zone. The nitrate content in the recirculating nitrified liquid is also reduced, preventing the liquid from anoxic tank 3 from flowing back into anaerobic tank 2 and affecting phosphorus removal. Consequently, the recirculation of the nitrified liquid improves the system's carbon removal and denitrification efficiency, achieving low-power circulation and reducing equipment energy consumption.

[0065] The implementation principle of the present application is as follows: during sewage treatment, the sewage is introduced into the water inlet pipe 6, and the sewage enters the anaerobic tank 2 through the water inlet pipe 6, and the particles or impurities in the sewage are intercepted by the filter screen, and the sewage and the sludge are effectively mixed by the mixer 14. In the absence of oxygen, the organic matter in the sewage is degraded by anaerobic bacteria into volatile organic matter such as organic acids and acetic acid, and a large amount of nitrate is produced in the process. At the same time, the ammonia nitrogen in the sewage is converted into nitrate by ammonia-oxidizing bacteria, and polyphosphate microorganisms (such as polyphosphate bacteria) will release phosphorus to meet the bacteria's demand for phosphorus.

[0066] Then, as the water level continues to rise, the sewage in the anaerobic tank 2 flows into the anoxic tank 3 through the No. 1 connecting tank 19, and the contact area between the microorganisms and the sewage is increased by two sets of NIM components. In the absence of oxygen, the nitrate in the wastewater is reduced to nitrogen gas by denitrifying bacteria, achieving denitrification.

[0067] Similarly, as the water level continues to rise, the sewage in the anoxic tank 3 flows into the aerobic sedimentation tank 4 through the No. 2 connecting tank 20. The blower compresses the external air and transmits it to the air transmission section 171. The air enters the three air outlet sections 172 through the air transmission section 171 and is aerated through the three sets of aeration disks 18, thereby increasing the dissolved oxygen concentration in the aerobic zone 41. Under oxygen conditions, organic matter and ammonia nitrogen in the wastewater are utilized by aerobic bacteria and converted into carbon dioxide, water, nitrates, etc. through oxidation reactions. At the same time, micro-power is generated through the air lift effect to promote the circulation of sewage inside the device, thereby enhancing the contact and reaction efficiency between sewage and microorganisms.

[0068] The sludge is then isolated in the aerobic zone 41 by the separation section 82, while the clear liquid is separated into the clarification zone 42 by the separation section 82, and the gas is collected in the gas collection hoods 81 on both sides of the separation section 82. When the gas is separated into the gas collection hoods 81 by the three-phase separator 8, it is collected by the gas collection hoods 81 to form gas lift. The gas lift, combined with the micro-power provided by the aeration component, drives the sewage in the aerobic zone 41 through the conduit 11 to the pre-anoxic tank 5. The oxygen in the sewage is continuously consumed by aerobic bacteria, converting the sewage in the pre-anoxic tank 5 into nitrified liquid. The nitrified liquid then flows back to the anoxic tank 3 through the connecting pipe 13 due to gravitational potential energy and the micro-power provided by the aeration component.

[0069] Thus, the micro-power generated by the aeration component can drive the sewage to circulate inside the device without consuming other energy, so that the energy consumption of the equipment is low. Combined with the pre-anoxic tank 5, the sewage treatment effect is better.

[0070] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A micro-powered sewage treatment device, comprising a water tank (1), characterized in that: An anaerobic tank (2), an anoxic tank (3), an aerobic sedimentation tank (4) and a pre-anoxic tank (5) are sequentially provided in the water tank (1); the anaerobic tank (2) is connected to the anoxic tank (3), and the anoxic tank (3) is connected to the aerobic sedimentation tank (4); a water inlet pipe (6) is provided through the water tank (1), and one end of the water inlet pipe (6) is connected to the anaerobic tank (2); The bottom of the aerobic sedimentation tank (4) is provided with a mud hopper (7), one side of the mud hopper (7) is provided with an aeration assembly for aeration, and the top side of the aeration assembly is provided with a three-phase separator (8) for separating sludge, clear liquid and gas. A mud discharge pipe (10) is provided through the side wall of the water tank (1), and the mud discharge pipe (10) is located at one end of the water tank (1) and extends into the mud hopper (7). The three-phase separator (8) includes an air collecting hood (81), and the air collecting hood (81) is provided with a conduit (11), and the conduit (11) connects the air collecting hood (81) with the pre-anoxic tank (5). An outlet pipe (12) is provided through the water tank (1), and one end of the outlet pipe (12) extends into the aerobic sedimentation tank (4) and is located on the top side of the three-phase separator (8). The water tank (1) is also provided with a connecting pipe (13) that connects the pre-anoxic tank (5) with the anoxic tank (3).

2. A micro-power sewage treatment device according to claim 1, characterized in that: A filter screen is provided in the water inlet pipe (6).

3. A micro-powered sewage treatment device according to claim 1, characterized in that: A stirrer (14) is provided at the bottom of the anaerobic tank (2), and the stirrer (14) is inclined.

4. A micro-powered sewage treatment device according to claim 1, characterized in that: The anoxic tank (3), the anaerobic tank (2) and the aerobic sedimentation tank (4) are located at the same height of the water tank (1) and the anoxic tank (3), the anaerobic tank (2) and the aerobic sedimentation tank (4) are at the same height; the top side of the anaerobic tank (2) is connected to the bottom side of the anoxic tank (3), and the top side of the anoxic tank (3) is connected to the bottom side of the aerobic sedimentation tank (4).

5. The micro-power sewage treatment device according to claim 1, characterized in that: A NIM component is arranged in the anoxic tank (3), and the NIM component comprises a frame (15) and a nuclear pore membrane-immobilized microorganism filler (16) arranged on the frame (15).

6. A micro-powered sewage treatment device according to claim 5, characterized in that: The frame (15) is made of stainless steel.

7. The micro-power sewage treatment device according to claim 1, characterized in that: The aeration assembly comprises an aeration pipe (17) and an aeration plate (18) arranged on the aeration pipe (17); the aeration pipe (17) comprises an air delivery section (171) and an air outlet section (172); the air delivery section (171) is arranged through the water tank (1), and one end of the air delivery section (171) is located in the aerobic sedimentation tank (4); the air outlet section (172) is connected to one end of the air delivery section (171) located in the aerobic sedimentation tank (4); the aeration plate (18) is connected to the air outlet section (172); and one end of the air delivery section (171) located outside the water tank (1) is connected to a blower.

8. A micro-powered sewage treatment device according to claim 7, characterized in that: Five aeration discs (18) form a group, and the five aeration discs (18) in one group are evenly spaced along the length direction of the air outlet section (172). Three air outlet sections (172) are provided, and the three air outlet sections (172) are consistent and evenly spaced along the length direction of the gas transmission section (171). Three groups of aeration discs (18) are provided corresponding to the number of air outlet sections (172), and the three groups of aeration discs (18) are provided in a one-to-one correspondence with the three air outlet sections (172).

9. The micro-power sewage treatment device according to claim 1, characterized in that: An overflow weir (9) is provided on the top side of the three-phase separator (8), and the overflow weir (9) comprises a weir body (91) and an overflow trough (92) sleeved on the weir body (91); the outer wall of the overflow trough (92) is connected to the side wall of the aerobic sedimentation tank (4); and one end of the outlet pipe (12) extends into the aerobic sedimentation tank and communicates with the overflow trough (92).

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