A type of urban sewage treatment device

Abstract

This invention discloses an urban wastewater treatment device, relating to the field of wastewater treatment. It includes a treatment tank, and further comprises: a pretreatment unit for separating large particulate impurities in wastewater; a composite biological reaction unit for organic degradation and nitrogen-phosphorus conversion of the wastewater after pretreatment; and a nano-adsorption unit for further removing minute pollutants and heavy metal ions. A disassembly plate is provided near the nano-adsorption unit in the treatment tank. A pump is installed on the top of the treatment tank. A water pipe facing the composite biological reaction unit is provided on the outer surface of the pump. A spray device with a high-pressure nozzle is also provided on the outer surface of the pump, facing the nano-adsorption unit. Wastewater first passes through the pretreatment unit to remove large particulate impurities, then enters the composite biological unit for organic degradation, and finally passes through the pump to the nano-adsorption unit for further removal of minute pollutants and heavy metal ions, thus achieving multiple treatment processes.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an urban wastewater treatment device. Background Technology

[0002] With the acceleration of urbanization, the urban population has grown rapidly, and industrial activities have become increasingly frequent, leading to an explosive increase in the amount of urban wastewater generated. At the same time, people's demands for water quality are constantly rising, making urban wastewater treatment a crucial link in ensuring the sustainable development of the urban ecological environment. However, existing urban wastewater treatment technologies have revealed significant limitations in several aspects.

[0003] Traditional biological treatment technologies often rely on single or a few types of microbial communities. When faced with complex urban wastewater containing diverse pollutants, their treatment capacity is severely limited. For example, relying on only a few common bacteria to treat wastewater is almost ineffective against some emerging pollutants, such as drug residues and endocrine disruptors. Furthermore, traditional biological treatment systems are extremely sensitive to fluctuations in water quality and quantity. When the concentration of organic matter in wastewater suddenly increases or decreases, the growth and metabolism of microorganisms are severely affected, leading to a significant drop in treatment efficiency and making it difficult to consistently meet discharge standards. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this invention is as follows: An urban sewage treatment device according to this invention includes a treatment tank, and further includes:

[0005] The system includes a pretreatment unit for separating large particulate impurities in wastewater, a composite bioreactor unit for organic degradation and nitrogen-phosphorus conversion of wastewater after pretreatment, and a nano-adsorption unit for further removal of minute pollutants and heavy metal ions.

[0006] The treatment box is equipped with a disassembly plate near the nano-adsorption unit. The top of the treatment box is equipped with a liquid pump. The outer surface of the liquid pump is equipped with a water pipe facing the composite bioreactor unit. The outer surface of the liquid pump is also equipped with a spray device facing the nano-adsorption unit and having a high-pressure nozzle.

[0007] The composite bioreactor unit includes a water storage tank, the inner wall of which is sequentially provided with a partition plate 1 and a partition plate 2. A flow unit 2 is provided on the partition plate 1, and a flow unit 1 is provided on the partition plate 2. Ventilation holes are provided on the partition plates 1 and 2. The partition plates 1 and 2 divide the water storage tank 1 into three biological chambers, which respectively house bacteria, algae, and fungi with special functions that efficiently degrade organic matter. A water-holding platform is provided on the top of the partition plate 2, and glass plates that allow sunlight to pass through are provided on both sides of the partition plate 1.

[0008] Preferably, the water storage tank is located on the side of the treatment tank near the pretreatment unit, bacteria are placed in the biological chamber on the side of the water storage tank near the water platform, algae are placed in the middle biological chamber of the water storage tank, and fungi are placed in the biological chamber on the other side.

[0009] Preferably, the circulation unit one includes a water pump two, the outer surface of the water pump two is provided with a water outlet pipe one, the side of the water pump two away from the water outlet pipe one is provided with a water inlet channel, the bottom of the water inlet channel is provided with a water inlet pipe one, the bottom of the water inlet channel is provided with an electrostatic adsorption device, the outer surface of the electrostatic adsorption device is provided with an electrode plate one, the inner wall of the water pipe one is provided with an electrode plate two connected to the electrostatic adsorption device by an electric wire, the outer surface of the electrode plate two is uniformly provided with adhesion protrusions of rough material, and the top of the water inlet pipe one is also provided with a recycling mechanism.

[0010] Preferably, the second water pump is located in the middle of the second partition, and the first water outlet pipe is located in the algae bio-chamber.

[0011] Preferably, the recycling mechanism includes a support column, a base block is fixedly connected to the bottom of the support column, an air float is slidably connected to the outer surface of the support column, a support plate is fixedly connected to the outer surface of the air float, and a soft brush is provided at the bottom of the support plate.

[0012] Preferably, the top of the support column is fixedly connected to the top of the water inlet pipe, and the soft brush is in contact with the outer surface of the electrode plate.

[0013] Preferably, the circulation unit two includes a water pump three, the outer surface of the water pump three is provided with a water inlet pipe two, the bottom of the water inlet pipe two is fixedly connected with a screen, and the side of the water pump three away from the water inlet pipe two is provided with a water outlet pipe three.

[0014] Preferably, the pretreatment unit includes a support frame, on which a rotating handle is provided. One end of the rotating handle is fixedly connected to an isolation filter. Side plates are symmetrically arranged on both sides of the isolation filter. Impact rods are symmetrically arranged on both sides of the side plates. A sliding block is slidably connected to the inner wall of the side plate. A scraper is fixedly connected to the side of the sliding block facing the isolation filter.

[0015] The support frame is symmetrically arranged on the top of the processing box, and the shovel is in contact with the isolation filter.

[0016] Preferably, the nano-adsorption unit includes a second water storage tank, a second support plate is provided on the inner wall of the second water storage tank, a curved surface is provided on the second support plate, a nanofiber membrane is provided on the top of the second support plate, the surface of the nanofiber membrane is loaded with a layer of nanoparticles with special adsorption properties, a second rotating handle is provided on the side of the second support plate, a rotating plate is provided at one end of the second rotating handle, and a stain tank is placed at the bottom of the second support plate.

[0017] Preferably, the nano-adsorption unit further includes support rods symmetrically arranged on both sides of the processing box, a support plate three is fixedly connected to the top of the support rods, telescopic rods are symmetrically arranged at the bottom of the support plate three, and a barrier plate is fixedly connected to the bottom of the telescopic rods.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. This invention, by setting up a pretreatment unit, allows wastewater to flow through an external pipe and pass through an isolation filter screen. The isolation filter screen will block large particles and dust. Every once in a while, by adjusting the rotating handle, the isolation filter screen will rotate half a turn, causing the sliding block, which was originally at the bottom, to rotate to the top. Due to its own gravity, the sliding block will slide down along the side plate and cause the scraper to scrape off the particles adhering to the surface of the isolation filter screen, thus avoiding excessive particles that may obstruct the movement of water and the isolation effect of the isolation filter screen.

[0020] 2. This invention treats wastewater by setting up a composite biological reaction unit with three biological chambers for bacteria, algae, and fungi. Specific bacteria preferentially decompose large organic molecules to provide nutrients for algae. Algae produce oxygen through photosynthesis, which in turn provides a living environment for aerobic bacteria, forming a benign ecological cycle.

[0021] 3. In this invention, by setting up a flow unit one, during the process of sewage and bacteria entering the inlet pipe one, the electrostatic adsorption device will energize electrode plate one and electrode plate two, thereby generating a magnetic field between the electrode plates. The generated magnetic field will adsorb bacteria in the sewage and make the bacteria adhere to the adhesion protrusions, and finally be recycled by the recycling mechanism.

[0022] 4. By setting up a recycling mechanism, the air float will be at the top of the support column under the buoyancy of water. As sewage enters the algae bio-chamber, the water level in the original bacterial bio-chamber drops, and the air float will slide down along the support column, thereby driving the support plate one and the soft brush to brush the electrode plate two and the adsorption protrusion. At the same time, the electrostatic adsorption device stops working, and the adsorbed bacteria will be brushed down to the bottom water.

[0023] 5. By setting up a nano-adsorption unit, the telescopic rod will drive the baffle plate to move downward at regular intervals, obstructing the flow of water. After accumulating a certain amount of water, the telescopic rod will return to its original position, and the accumulated water will flow through the curved surface to the back of the nanofiber membrane, achieving reverse rinsing of the nanofiber membrane. At the same time, the rotating plate will be opened to flush the blocked microparticles, colloids, bacteria and other pollutants into the stain tank. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a cross-sectional view of the structure of the present invention.

[0026] Figure 3 This is a schematic diagram of the preprocessing unit of the present invention.

[0027] Figure 4 This is a partial structural schematic diagram of the preprocessing unit of the present invention.

[0028] Figure 5 This is a schematic diagram of the structure of the composite bioreactor unit of the present invention.

[0029] Figure 6 This is a schematic diagram of the structure of the first circulation unit of the present invention.

[0030] Figure 7 This is a cross-sectional view of the structure of the first circulation unit of the present invention.

[0031] Figure 8 yes Figure 7 Enlarged view of point A in the middle.

[0032] Figure 9 This is a schematic diagram of the structure of the second circulation unit of the present invention.

[0033] Figure 10 This is a schematic diagram of the structure of the nano-adsorption unit of the present invention.

[0034] In the diagram: 1. Processing tank; 2. Pretreatment unit; 3. Liquid pump one; 4. Water pipe one; 5. Spraying device; 6. High-pressure nozzle; 7. Disassembly plate; 8. Composite bioreactor unit; 9. Nano-adsorption unit; 21. Support frame; 22. Rotary handle one; 23. Isolation filter; 24. Side plate; 25. Impact rod; 26. Sliding block; 27. Shovel; 81. Water storage tank one; 82. Partition one; 83. Partition two; 84. Water holding platform; 85. Glass plate; 86. Vent hole; 87. Flow unit one; 88. Flow unit two; 871. Water pump two; 872. Water outlet pipe one; 873. Water inlet; 874. Water inlet pipe one; 875. 876. Electrode plate one; 877. Electrode plate two; 878. Adhesion protrusion; 879. Recycling mechanism; 8791. Support column; 8792. Base block; 8793. Air float plate; 8794. Support plate one; 8795. Soft brush; 881. Water pump three; 882. Inlet pipe two; 883. Screen; 884. Outlet pipe three; 91. Water storage tank two; 92. Support plate two; 93. Curved surface; 94. Nanofiber membrane; 95. Nanoparticle layer; 96. Rotating handle two; 97. Rotating plate; 98. Stain box; 99. Support rod; 910. Support plate three; 911. Telescopic rod; 912. Barrier plate. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0036] Example 1, using Figures 1-10 An urban wastewater treatment device according to one embodiment of the present invention will be described as follows.

[0037] like Figures 1-2 As shown, a municipal wastewater treatment device of the present invention includes a treatment tank 1, and further includes:

[0038] The pretreatment unit 2 separates large particulate impurities in wastewater, the composite biological reaction unit 8 performs organic degradation and nitrogen and phosphorus conversion on the wastewater after pretreatment unit 2, and the nano-adsorption unit 9 further removes small pollutants and heavy metal ions.

[0039] A disassembly plate 7 is provided near the nano-adsorption unit 9 in the treatment box 1. A liquid pump 3 is provided on the top of the treatment box 1. A water pipe 4 facing the composite bioreactor unit 8 is provided on the outer surface of the liquid pump 3. A spray device 5 with a high-pressure nozzle 6 facing the nano-adsorption unit 9 is also provided on the outer surface of the liquid pump 3.

[0040] When this invention is in operation, the wastewater first passes through the pretreatment unit 2 to remove large particulate impurities, then enters the composite biological unit where it is organically degraded, and finally passes through the pump 3 into the nano-adsorption unit 9 to further remove tiny pollutants and heavy metal ions, thereby achieving multiple treatments.

[0041] like Figure 5 As shown, the composite bioreactor unit 8 includes a water storage tank 81. The inner wall of the water storage tank 81 is provided with a partition 82 and a partition 83. A flow unit 88 is provided on the partition 82 and a flow unit 87 is provided on the partition 83. Ventilation holes 86 are provided on the partitions 82 and 83. The partitions 82 and 83 divide the water storage tank 81 into three biological chambers, which respectively house bacteria, algae, and fungi with special functions that efficiently degrade organic matter. A water-holding platform 84 is provided on the top of the partition 82, and glass plates 85 that allow sunlight to pass through are provided on both sides of the partition 82.

[0042] The water storage tank 81 is located on the side of the treatment tank 1 near the pretreatment unit 2. Bacteria are placed in the biological chamber on the side of the water storage tank 81 near the water holding platform 84, algae are placed in the middle biological chamber of the water storage tank 81, and fungi are placed in the biological chamber on the other side.

[0043] Three biocontainers—bacteria, algae, and fungi—were set up to treat the wastewater. Bacteria, using their secreted extracellular enzymes, break down large organic molecules into smaller ones, which are more easily absorbed and utilized by other microorganisms. This process not only reduces the organic matter content in the wastewater but also provides essential nutrients for subsequent algal growth. Algae utilize the nutrients produced by bacterial decomposition of organic matter to grow and reproduce through photosynthesis. The oxygen produced by photosynthesis is crucial for maintaining the aerobic environment within the system, providing suitable living conditions for aerobic bacteria and ensuring their continuous and efficient decomposition of residual organic matter in the wastewater. Finally, fungi decompose recalcitrant organic pollutants in the wastewater. Simultaneously, fungi produce metabolic products during their metabolism, some of which promote the growth of bacteria and algae, further optimizing the treatment efficiency of the entire microbial ecosystem.

[0044] like Figures 6-7As shown, the circulation unit 87 includes a second water pump 871. The outer surface of the second water pump 871 is provided with an outlet pipe 872. The side of the second water pump 871 away from the outlet pipe 872 is provided with an inlet channel 873. The bottom of the inlet channel 873 is provided with an inlet pipe 874. The bottom of the inlet channel 873 is provided with an electrostatic adsorption device 875. The outer surface of the electrostatic adsorption device 875 is provided with an electrode plate 876. The inner wall of the water pipe 874 is provided with an electrode plate 877 connected to the electrostatic adsorption device 875 by an electric wire. The outer surface of the electrode plate 877 is uniformly provided with rough adhesion protrusions 878. The top of the inlet pipe 874 is also provided with a recycling mechanism 879.

[0045] After the wastewater is decomposed by bacteria, it is pumped into the algae biocompartment by pump 871 through inlet pipe 874. If the bacterial community enters the algae biocompartment, some microorganisms may compete for limited resources such as nutrients and living space, which may hinder the growth of some microorganisms. At the same time, some microorganisms may produce substances that inhibit the growth of other microorganisms during metabolism. Therefore, during the process of the wastewater and bacteria entering inlet pipe 874, the electrostatic adsorption device 875 will energize electrode plate 876 and electrode plate 877, thereby generating a magnetic field between the electrode plates. The generated magnetic field will adsorb the bacteria in the wastewater and make the bacteria adhere to the adhesion protrusion 878. Finally, the bacteria are recovered by the recycling mechanism 879.

[0046] Pump 2 871 is located in the middle of partition 2 83, and outlet pipe 1 872 is located in the algae biocompartment.

[0047] like Figure 8 As shown, the recycling mechanism 879 includes a support column 8791, a bottom block 8792 fixedly connected to the bottom of the support column 8791, an air float 8793 slidably connected to the outer surface of the support column 8791, a support plate 8794 fixedly connected to the outer surface of the air float 8793, and a soft brush 8795 provided at the bottom of the support plate 8794.

[0048] The air float 8793 will be located at the top of the support column 8791. As the sewage enters the algae bio-chamber, the water level in the original bacterial bio-chamber drops, and the air float 8793 will slide down along the support column 8791, thereby driving the support plate 8794 and the soft brush 8795 to brush the electrode plate 877 and the adsorption protrusion 878. At the same time, the electrostatic adsorption device 875 stops working, and the adsorbed bacteria will be brushed down to the bottom water.

[0049] The top of the support column 8791 is fixedly connected to the top of the water inlet pipe 874, and the soft brush 8795 is in contact with the outer surface of the electrode plate 877.

[0050] like Figure 9As shown, the circulation unit 2 88 includes a pump 3 881. The outer surface of the pump 3 881 is provided with an inlet pipe 2 882. A screen 883 is fixedly connected to the bottom of the inlet pipe 2 882. An outlet pipe 3 884 is provided on the side of the pump 3 881 away from the inlet pipe 2 882.

[0051] Screen 883 can prevent algae from entering the fungal biocompartment, thus avoiding competition for survival.

[0052] The specific workflow is as follows:

[0053] During operation, wastewater first comes into contact with bacteria, reducing the organic matter content in the wastewater. Then, algae absorb nitrogen and phosphorus from the wastewater, reducing the risk of eutrophication and minimizing environmental harm. Finally, fungi have the ability to specifically treat certain pollutants in wastewater treatment. When wastewater passes through the first flow unit 87, the electrostatic adsorption device 875 energizes the first electrode plate 876 and the second electrode plate 877, thereby generating a magnetic field between the electrode plates. The generated magnetic field adsorbs bacteria in the wastewater and causes the bacteria to adhere to the adhesion protrusions 878. As the wastewater enters the algae bio-chamber, the water level in the original bacterial bio-chamber drops, and the air float 8793 slides down along the support column 8791, thereby driving the first support plate 8794 and the soft brush 8795 to brush the second electrode plate 877 and the adhesion protrusions 878. At the same time, the electrostatic adsorption device 875 stops working, and the adsorbed bacteria are brushed off into the bottom water, achieving biological isolation.

[0054] Example 2, using Figures 1-10 An urban wastewater treatment device according to one embodiment of the present invention will be described as follows.

[0055] like Figures 3-4 As shown, in a city sewage treatment device of the present invention, based on Embodiment 1, the pretreatment unit 2 includes a support frame 21, a rotating handle 22 is provided on the support frame 21, one end of the rotating handle 22 is fixedly connected to an isolation filter screen 23, side plates 24 are symmetrically arranged on both sides of the isolation filter screen 23, impact rods 25 are symmetrically arranged on both sides of the side plates 24, a sliding block 26 is slidably connected to the inner wall of the side plate 24, and a shovel 27 is fixedly connected to the side of the sliding block 26 facing the isolation filter screen 23;

[0056] The support frame 21 is symmetrically arranged on the top of the processing box 1, and the scraper 27 is in contact with the isolation filter 23.

[0057] After the sewage flows through the external pipe and passes through the isolation filter 23, the isolation filter 23 will block large particles and dust. Every once in a while, by adjusting the rotating handle 22, the isolation filter 23 will rotate half a circle, so that the sliding block originally at the bottom will rotate to the top. Due to its own gravity, the sliding block will slide down along the side plate and cause the scraper 27 to scrape off the particles adhering to the surface of the isolation filter 23, so as to avoid excessive particles from obstructing the movement of water and the isolation effect of the isolation filter 23.

[0058] like Figure 10 As shown, the nano-adsorption unit 9 includes a water storage tank 91, a support plate 92 is provided on the inner wall of the water storage tank 91, a curved surface 93 is provided on the support plate 92, a nanofiber membrane 94 is provided on the top of the support plate 92, a nanoparticle layer 95 with special adsorption properties is loaded on the surface of the nanofiber membrane 94, a rotating handle 96 is provided on the side of the support plate 92, a rotating plate 97 is provided at one end of the rotating handle 96, and a stain box 98 is placed at the bottom of the support plate 92.

[0059] The nano-adsorption unit 9 also includes support rods 99 symmetrically arranged on both sides of the processing box 1. The top of the support rods 99 is fixedly connected to a support plate 910, and the bottom of the support plate 910 is symmetrically arranged with telescopic rods 911. The bottom of the telescopic rods 911 is fixedly connected to a barrier plate 912.

[0060] After the sewage enters the storage tank 91 through the pump 3, it passes through the nanofiber membrane 94, whose pore size can be precisely controlled at the nanometer level. This membrane can effectively intercept pollutants such as tiny particles, colloids, and bacteria in the sewage. At the same time, the nanoparticles on the membrane surface can specifically adsorb heavy metal ions and organic pollutants in the sewage, further improving the purification effect. Every once in a while, the telescopic rod 911 will drive the baffle plate 912 to move downward, obstructing the flow of water. After a certain amount of water is accumulated, the telescopic rod 911 will return to its original position, and the accumulated water will flow through the curved surface 93 to the back of the nanofiber membrane 94, achieving reverse flushing of the nanofiber membrane 94. At the same time, the rotating plate 97 is opened to flush the blocked tiny particles, colloids, bacteria, and other pollutants into the sludge tank 98.

[0061] The specific workflow is as follows:

[0062] During operation, wastewater passes through the isolation filter 23 before entering the composite biological unit. The isolation filter 23 blocks large particles and dust. Every so often, by adjusting the rotating handle 22, the isolation filter 23 rotates half a circle, causing the sliding block, which was originally at the bottom, to rotate to the top. Due to its own gravity, the sliding block slides down along the side plate, causing the scraper 27 to scrape off the particles adhering to the surface of the isolation filter 23. At the same time, after passing through the composite biological unit, the wastewater passes through the nanofiber membrane 94 and effectively intercepts pollutants such as tiny particles, colloids, and bacteria. Every so often, the telescopic rod 911 moves the baffle plate 912 downward, obstructing the flow of water. After accumulating a certain amount of water, the telescopic rod 911 returns to its original position, and the accumulated water flows through the curved surface 93 to the back of the nanofiber membrane 94, achieving reverse flushing of the nanofiber membrane 94.

[0063] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A municipal wastewater treatment device, comprising a treatment tank (1), characterized in that, Also includes: The pretreatment unit (2) separates large particulate impurities in wastewater, the composite bioreactor (8) performs organic degradation and nitrogen and phosphorus conversion on the wastewater after the pretreatment unit (2), and the nano-adsorption unit (9) further removes small pollutants and heavy metal ions. The processing box (1) is provided with a disassembly plate (7) near the nano-adsorption unit (9). The top of the processing box (1) is provided with a liquid pump (3). The outer surface of the liquid pump (3) is provided with a water pipe (4) facing the composite bioreactor unit (8). The outer surface of the liquid pump (3) is also provided with a spraying device (5) facing the nano-adsorption unit (9) and having a high-pressure nozzle (6). The composite bioreactor unit (8) includes a water storage tank (81). The inner wall of the water storage tank (81) is provided with a partition (82) and a partition (83) in sequence. A flow unit (88) is provided on the partition (82), and a flow unit (87) is provided on the partition (83). Ventilation holes (86) are provided on the partition (82) and the partition (83). The partition (82) and the partition (83) divide the water storage tank (81) into three biological chambers, which respectively hold bacteria, algae and fungi with special functions that efficiently degrade organic matter. A water-holding platform (84) is provided on the top of the partition (2). Glass plates (85) that can transmit sunlight are provided on both sides of the partition (82). The circulation unit 1 (87) includes a water pump 2 (871), the outer surface of the water pump 2 (871) is provided with a water outlet pipe 1 (872), the side of the water pump 2 (871) away from the water outlet pipe 1 (872) is provided with a water inlet channel (873), the bottom of the water inlet channel (873) is provided with a water inlet pipe 1 (874), the bottom of the water inlet channel (873) is provided with an electrostatic adsorption device (875), the outer surface of the electrostatic adsorption device (875) is provided with an electrode plate 1 (876), the inner wall of the water pipe 1 (4) is provided with an electrode plate 2 (877) connected to the electrostatic adsorption device (875) by an electric wire, the outer surface of the electrode plate 2 (877) is uniformly provided with rough adhesion protrusions (878), and the top of the water inlet pipe 1 (874) is also provided with a recycling mechanism (879). The second circulation unit (88) includes a third pump (881), an inlet pipe (882) is provided on the outer surface of the third pump (881), a screen (883) is fixedly connected to the bottom of the inlet pipe (882), and an outlet pipe (884) is provided on the side of the third pump (881) away from the inlet pipe (882). The nano-adsorption unit (9) includes a water storage tank (91), a support plate (92) is provided on the inner wall of the water storage tank (91), a curved surface (93) is provided on the support plate (92), a nanofiber membrane (94) is provided on the top of the support plate (92), a nanoparticle layer (95) with special adsorption properties is loaded on the surface of the nanofiber membrane (94), a rotating handle (96) is provided on the side of the support plate (92), a rotating plate (97) is provided at one end of the rotating handle (96), and a stain box (98) is placed at the bottom of the support plate (92).

2. The urban sewage treatment device according to claim 1, characterized in that: The first water storage tank (81) is located on the side of the treatment tank (1) near the pretreatment unit (2). Bacteria are placed in the biological chamber on the side of the first water storage tank (81) near the water holding platform (84), algae are placed in the middle biological chamber of the first water storage tank (81), and fungi are placed in the biological chamber on the other side.

3. The urban sewage treatment device according to claim 1, characterized in that: The second water pump (871) is located in the middle of the second partition (83), and the first water outlet pipe (872) is located in the algae biocompartment.

4. The urban sewage treatment device according to claim 1, characterized in that: The recycling mechanism (879) includes a support column (8791), a bottom block (8792) is fixedly connected to the bottom of the support column (8791), an air float plate (8793) is slidably connected to the outer surface of the support column (8791), a support plate (8794) is fixedly connected to the outer surface of the air float plate (8793), and a soft brush (8795) is provided at the bottom of the support plate (8794).

5. A municipal wastewater treatment device according to claim 4, characterized in that: The top of the support column (8791) is fixedly connected to the top of the water inlet pipe (874), and the soft brush (8795) is in contact with the outer surface of the electrode plate (877).

6. A municipal wastewater treatment device according to claim 1, characterized in that: The pretreatment unit (2) includes a support frame (21), on which a rotating handle (22) is provided. One end of the rotating handle (22) is fixedly connected to an isolation filter (23). Side plates (24) are symmetrically arranged on both sides of the isolation filter (23). Impact rods (25) are symmetrically arranged on both sides of the side plates (24). A sliding block (26) is slidably connected to the inner wall of the side plate (24). A scraper (27) is fixedly connected to the side of the sliding block (26) facing the isolation filter (23). The support frame (21) is symmetrically arranged on the top of the processing box (1), and the shovel (27) is in contact with the isolation filter (23).

7. A municipal wastewater treatment device according to claim 1, characterized in that: The nano-adsorption unit (9) also includes support rods (99) symmetrically arranged on both sides of the processing box (1). The top of the support rod (99) is fixedly connected to a support plate three (910), and the bottom of the support plate three (910) is symmetrically arranged with telescopic rods (911). The bottom of the telescopic rod (911) is fixedly connected to a barrier plate (912).

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