Wastewater treatment and reuse equipment and method

Abstract

This invention relates to the field of wastewater treatment, specifically to a wastewater treatment and reuse device and method. The device includes a tank containing a wastewater purification mechanism. This mechanism comprises a primary filtration component and a secondary filtration component. The primary filtration component includes a filter screen and a rotating shaft for driving the filter screen's rotation. The secondary filtration component includes a microbial membrane ring plate fixedly connected to the tank and a stirring structure mounted on the rotating shaft. A return pipe is connected between the bottom and top of the tank to guide the filtered water from the bottom of the tank back into the secondary filtration component. This invention removes large particulate impurities and suspended solids through the filter screen. Subsequently, the wastewater flows onto the microbial membrane ring plate, where the stirring structure on the rotating shaft ensures uniform distribution and sufficient contact with the microorganisms. The filtered water is then pumped back onto the microbial membrane ring plate through the return pipe, forming a circulating filtration process, thus improving the safety and quality of the reused water.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, specifically to a wastewater treatment and reuse device and method. Background Technology

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or for reuse. Besides physical filtration, which uses fine pores like screens for filtration and screening, membrane purification is also a common wastewater treatment method. Biofilm technology uses microorganisms that attach to and grow on the surface of certain solids to treat organic wastewater; however, currently, there are no commercially available devices that can utilize both treatment methods simultaneously, requiring a large number of devices to achieve this, resulting in high costs.

[0003] The currently disclosed Chinese patent CN216472719U discloses a wastewater treatment device combining physical filtration and membrane purification. The device includes a body with a filter chamber and a purification chamber located on its upper and lower sides. An outlet and an inlet are located at the upper and lower ends of the body, respectively. A filter screen, shaped like a frustum, is installed inside each filter chamber. A motor is fixedly mounted on the right end of the body. A second rotating shaft is vertically inserted into the center of the filter screen via a bearing. A connecting block is mounted on the upper end of the second rotating shaft via a telescopic mechanism. Brush rods are symmetrically welded to the left and right ends of the connecting block, and the bristles at the lower end of the brush rods are aligned with... The upper surface of the filter screen is attached to each other, and a push block is provided at the lower end of the brush rod. A slag discharge port is opened at the left end of the machine body, and the lower wall of the slag discharge port is flush with the upper edge of the filter screen. The lower end of the filter chamber is funnel-shaped, and a fourth conical tooth is opened at the center of the lower end of the filter chamber. A connecting pipe is inserted through a bearing at the lower end opening of the fourth conical tooth. The output end of the motor is connected to the second rotating shaft and the connecting pipe through a transmission mechanism. A diversion seat is fixedly installed at the lower end of the connecting pipe, and four diversion pipes are inserted on the diversion seat. A nozzle is fixedly installed at the end of the diversion pipe. A microbial membrane ring plate is welded in a stepped manner on the lower surface of the purification chamber.

[0004] According to the aforementioned patent, the wastewater undergoes physical filtration using a filter screen to remove impurities. The physically treated wastewater is then sprayed onto an uppermost microbial membrane ring plate using a spray nozzle, allowing it to fall in a stepped manner along the ring plate. During this descent, the wastewater is filtered by the microbial membrane attached to the surface of the ring plate, achieving membrane purification. Although the wastewater falls in a stepped manner along the microbial membrane ring plate, the contact time with the microorganisms may be relatively short, especially at high flow rates, potentially resulting in insufficient degradation of organic matter by the microorganisms. Therefore, there is a current need for a wastewater treatment and reuse system that can fully purify wastewater to ensure the safety and quality of the reused water. Summary of the Invention

[0005] To address the problems existing in current technology, this invention provides a wastewater treatment and reuse device. The invention first removes large particulate impurities and suspended solids through a filter screen. Then, the wastewater flows onto a microbial membrane ring plate and, in conjunction with the stirring structure on the rotating shaft, ensures that the wastewater is evenly distributed and fully contacts the microorganisms. The filtered water is then pumped back onto the microbial membrane ring plate through a return pipe, forming a circulating filtration state, thereby improving the safety and quality of the reused water.

[0006] To address the problems of existing technologies, this invention provides a wastewater treatment and reuse device, comprising a tank with an inlet and an outlet. The tank contains a wastewater purification mechanism, which includes a primary filtration assembly located in the upper half of the tank and a secondary filtration assembly located in the lower half. The primary filtration assembly includes a filter screen and a rotating shaft for driving the filter screen to rotate. A rotary actuator is provided on the tank to drive the rotating shaft. The secondary filtration assembly includes a microbial membrane ring plate fixedly connected to the tank and a stirring structure mounted on the rotating shaft to follow the shaft and fully distribute wastewater onto the microbial membrane ring plate. The filter screen has a positive conical structure, and the microbial membrane ring plate has an inverted conical structure. A return pipe is connected between the bottom and top of the tank to guide the filtered water from the bottom of the tank back into the secondary filtration assembly. The return pipe has a water pump to provide water flow power. When the return pipe guides the filtered water back into the secondary filtration assembly, the wastewater is in a state of recirculation filtration.

[0007] Preferably, the primary filtration assembly further includes an inverted conical slide located directly below the filter screen and fixedly connected to the tank body. A positive conical slide is fixedly provided on the rotating shaft below the inverted conical slide to guide the sewage to flow toward the microbial membrane ring plate. A gap is left between the inverted conical slide and the positive conical slide for the sewage to fall. A dosing port for adding purifying agent is opened on the tank body between the filter screen and the inverted conical slide. A purification cavity is formed between the filter screen and the inverted conical slide for the sewage and the purifying agent to mix.

[0008] Preferably, a stirring frame is fixed on the rotating shaft and located in the purification cavity. The stirring frame has an upper surface parallel to the filter screen and a lower surface parallel to the inverted conical slope. A blocking structure is provided between the stirring frame and the filter screen to prevent clean water from flowing down. When the blocking structure blocks the lower end of the stirring frame and the filter screen, a backwashing space is formed between the upper surface of the stirring frame and the filter screen. A flow channel is opened on the rotating shaft from its upper end downwards. A backwash nozzle is opened on the rotating shaft at the position corresponding to the backwashing space to allow clean water to be discharged into it. A water filling port is opened on the top of the tank to allow clean water to be introduced into the flow channel.

[0009] Preferably, the upper surface of the inverted cone landslide is provided with a number of protrusions around its circumference to slow down the flow of sewage. The lower surface of the mixing frame is provided with mixing strips to evenly mix sewage and purifying agent on the inverted cone landslide. A return nozzle is provided on the rotating shaft at a position corresponding to the inverted cone landslide and the conical landslide to allow filtered water to flow back into the microbial membrane ring plate. The flow channel on the rotating shaft is also connected to the return pipe. Both the return nozzle and the backflush nozzle are equipped with solenoid valves.

[0010] Preferably, the space between the stirring frame and the rotating shaft is a closed space, in which a heating coil is provided. The flow channel of the rotating shaft is provided with a guide pipe for introducing the heating medium into the closed space for heating by the heating coil. When the stirring frame is heated, the sewage is in a heated state, which reduces the viscosity of the sewage and allows it to come into full contact with the purifying agent.

[0011] Preferably, a sealing gasket is fixed on the tank body to contact the lower end of the filter screen to prevent sewage from flowing out from the gap between the filter screen and the tank body, and an external discharge port for backwashing water is opened on the tank body at the position directly opposite the lower end of the filter screen.

[0012] Preferably, the microbial membrane ring plate is composed of several inverted conical plates that gradually decrease in height from top to bottom to form a stepped support platform, and each plate surface is coated with a microbial membrane.

[0013] Preferably, a conical plate is provided between every two adjacent inverted conical plates on the conical landslide to prevent sewage from splashing directly onto the bottom of the tank.

[0014] Preferably, each positive conical plate has a stirring rod extending along the direction of the corresponding inverted conical plate surface, and all the stirring rods constitute the stirring structure.

[0015] The present invention also provides a wastewater treatment and reuse method, comprising the following steps:

[0016] S1. Start the rotating shaft to drive the filter screen to rotate and fully contact the sewage to remove large particulate impurities and suspended solids;

[0017] S2. The pre-filtered wastewater enters the microbial membrane ring plate for further decomposition of harmful substances in the wastewater;

[0018] S3. The stirring structure rotates with the shaft, evenly distributing the wastewater onto the microbial membrane ring plate;

[0019] S4. The return pipe pumps the filtered water from the bottom of the tank back to the microbial membrane ring plate, forming a circulating filtration state.

[0020] The advantages of this application compared to the prior art are:

[0021] 1. This invention utilizes a conical filter screen rotated by a rotary actuator to effectively remove large particulate impurities and suspended solids, ensuring initial purification. Subsequently, wastewater flows into an inverted conical microbial membrane ring plate in the lower half of the tank. This ring plate carries a large community of microorganisms that decompose organic matter, and, in conjunction with the stirring structure on the rotating shaft, ensures that the wastewater is evenly distributed and fully contacts the microorganisms, thereby improving the decomposition efficiency of organic pollutants.

[0022] The reflux pipe pumps the filtered water from the bottom back onto the microbial membrane ring plate, creating a circulating filtration system. This ensures that contaminants that are difficult to remove in one pass are treated multiple times, greatly improving the purification effect.

[0023] 2. In this invention, after initial filtration through a filter screen, the wastewater falls into an inverted cone-shaped slide and mixes thoroughly with the purification agent added through the dosing port within the purification cavity, further removing impurities. By combining filter treatment with chemical treatment, this ensures that wastewater undergoes efficient preliminary purification before entering the secondary filtration stage, significantly improving the overall purification effect and the efficiency of subsequent treatments.

[0024] 3. This invention utilizes a closed-loop structure to create a backwashing space between the filter screen and the agitator during filter cleaning. This ensures that clean water, applied under high pressure, thoroughly cleans the filter screen from the inside out, effectively removing impurities and blockages. Regular and effective backwashing reduces filter screen clogging, extends the overall lifespan of the filter screen, and improves filtration efficiency.

[0025] 4. The present invention uses a microbial membrane ring plate composed of multiple inverted conical plates, which gradually decreases from top to bottom to form a stepped support platform. This allows wastewater to have a longer path and more residence time when flowing through each inverted conical plate, increasing the contact area with the microbial membrane and significantly improving the degradation efficiency of pollutants.

[0026] The presence of a conical plate between each pair of adjacent inverted conical plates effectively prevents wastewater from splashing directly to the bottom of the tank, ensuring that the wastewater flows sequentially along a predetermined path and fully contacts the microbial biofilm. Furthermore, the stirring rod effectively agitates the water flow, ensuring ample contact between the wastewater and the microbial biofilm, further enhancing the metabolic efficiency of the microorganisms and the overall wastewater treatment effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the top orientation of a wastewater treatment and reuse equipment.

[0028] Figure 2 This is a three-dimensional structural diagram of a wastewater treatment and reuse equipment, showing its bottom orientation.

[0029] Figure 3 This is a partial three-dimensional structural cross-sectional view of a wastewater treatment and reuse equipment.

[0030] Figure 4 This is a plan sectional view of a wastewater treatment and reuse equipment.

[0031] Figure 5 This is an enlarged view of point A.

[0032] Figure 6 This is an enlarged view of point B.

[0033] Figure 7 This is an enlarged view of point C.

[0034] Figure 8 This is a schematic diagram of a wastewater treatment and reuse equipment with a closed structure, closing the gap between the mixing frame and the lower end of the filter screen.

[0035] Figure 9 This is a schematic diagram showing the state of the closed structure of a wastewater treatment and reuse equipment with the gap between the mixing frame and the lower end of the filter screen open.

[0036] Figure 10 This is a partial three-dimensional cross-sectional view of the microbial membrane ring plate of a wastewater treatment and reuse equipment.

[0037] The diagram is labeled as follows: 1-Tank body; 11-Inlet; 12-Outlet; 13-Dosing port; 14-Filling port; 15-External discharge port; 2-Primary filter assembly; 21-Filter screen; 211-Backwash space; 212-Sealing gasket; 22-Rotating shaft; 221-Flow channel; 2211-Backwash nozzle; 2212-Return nozzle; 23-Inverted conical slope; 231-Protrusion; 24-Positive conical slope; 3-Secondary filter assembly; 31-Microbial ring plate; 311-Inverted conical plate; 32-Agitator structure; 321-Positive conical plate; 322-Agitator rod; 4-Return pipe; 5-Agitator frame; 51-Agitator bar; 52-Heating coil; 53-Guide pipe; 6-Blocking structure; 61-Ring body; 62-Push rod; 63-Spring. Detailed Implementation

[0038] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0039] See Figures 1-4As shown, a wastewater treatment and reuse device includes a tank 1 with an inlet 11 and an outlet 12. The tank 1 contains a wastewater purification mechanism, which includes a primary filtration assembly 2 located in the upper half of the tank 1 and a secondary filtration assembly 3 located in the lower half of the tank 1. The primary filtration assembly 2 includes a filter screen 21 and a rotating shaft 22 for driving the filter screen 21 to rotate. The tank 1 is equipped with a rotary actuator for driving the rotating shaft 22 to rotate. The secondary filtration assembly 3 includes microorganisms fixedly connected to the tank 1. The membrane ring plate and the stirring structure 32, which is set on the rotating shaft 22 to rotate with the rotating shaft 22 and fully distribute the sewage on the microbial membrane ring plate, are included. The filter screen 21 has a positive cone structure, and the microbial membrane ring plate has an inverted cone structure. A return pipe 4 is connected between the bottom and top of the tank 1 to guide the filtered water at the bottom of the tank 1 back to the secondary filtration component 3. The return pipe 4 has a water pump to provide water flow power. When the return pipe 4 guides the filtered water back to the secondary filtration component 3, the sewage is in a state of being circulated and filtered.

[0040] When wastewater is treated, the wastewater first enters the tank 1 through the inlet 11. The wastewater will directly contact the primary filter component 2 located in the upper part of the tank 1. As the rotating shaft 22 is driven to rotate by the rotating driver, it will drive the filter screen 21 to rotate, so that the wastewater can come into more full contact with the filter screen 21, further improving the filtration effect.

[0041] After the wastewater passes through the primary filtration component 2, most of the suspended solids have been effectively removed. The next step is a more refined secondary filtration stage. At this point, the wastewater flows into the secondary filtration component 3 in the lower half of the tank 1, landing on the microbial membrane ring plate. This ring plate carries a large community of microorganisms capable of decomposing organic matter. These microorganisms can convert harmful substances in the wastewater into harmless ones, achieving the purpose of water purification. To ensure sufficient contact between the wastewater and the microbial membrane ring plate, the stirring structure 32 rotates along with the rotating shaft 22, effectively dispersing the wastewater and distributing it evenly on the microbial membrane ring plate. This allows the microorganisms more opportunities to contact the pollutants in the wastewater, improving purification efficiency.

[0042] In this process, the return pipe 4 allows the wastewater to return to the microbial membrane ring plate for repeated treatment. The water that has already been filtered at the bottom of the tank 1 is pumped back to the secondary filter element 3, which not only removes impurities from the wastewater more thoroughly, but also ensures that pollutants that are difficult to remove in one go have more treatment time. The wastewater is in a state of circulating filtration. The circulation mechanism ensures that every tiny pollutant has the opportunity to be filtered multiple times, which greatly improves the overall purification effect.

[0043] See Figures 3-5As shown, the primary filtration assembly 2 also includes an inverted conical slide 23 located directly below the filter screen 21 and fixedly connected to the tank body 1. A positive conical slide 24 is fixedly provided on the rotating shaft 22 below the inverted conical slide 23 to guide the sewage to flow toward the microbial membrane ring plate. A gap is left between the inverted conical slide 23 and the positive conical slide 24 for the sewage to fall. A dosing port 13 for adding purifying agent is opened on the tank body 1 between the filter screen 21 and the inverted conical slide 23. A purification cavity for mixing sewage and purifying agent is formed between the filter screen 21 and the inverted conical slide 23.

[0044] After the wastewater undergoes preliminary filtration through the filter screen 21, it falls onto the inverted conical ramp 23 located directly below the filter screen 21 and fixedly connected to the tank body 1. At this time, the dosing port 13 on the tank body 1 introduces the purification agent into the purification cavity between the filter screen 21 and the inverted conical ramp 23, allowing the wastewater and the agent to mix thoroughly and further enhance the purification effect.

[0045] Subsequently, the wastewater flows downwards along the inverted conical landslide 23, passes through the gap between the inverted conical landslide 23 and the upright conical landslide 24, and finally flows towards the microbial membrane ring plate under the guidance of the upright conical landslide 24, entering the secondary filtration stage. This ensures that the wastewater has undergone preliminary purification and chemical treatment before flowing into the microbial membrane ring plate, improving the efficiency and effectiveness of subsequent treatment.

[0046] See Figures 3-6 , Figure 8 and Figure 9 As shown, a stirring frame 5 located in the purification cavity is fixed on the rotating shaft 22. The stirring frame 5 has an upper surface parallel to the filter screen 21 and a lower surface parallel to the inverted conical slope 23. A blocking structure 6 that can prevent clean water from flowing down is provided between the stirring frame 5 and the filter screen 21. When the blocking structure 6 blocks the lower end of the stirring frame 5 and the filter screen 21, a backwashing space 211 is formed between the upper surface of the stirring frame 5 and the filter screen 21. A flow channel 221 is opened from its upper end downward on the rotating shaft 22. A backwash nozzle 2211 for clean water to be discharged into the backwashing space 211 is opened on the rotating shaft 22 at the position corresponding to the backwashing space 211. A water filling port 14 for clean water to be introduced into the flow channel 221 is opened on the top of the tank 1.

[0047] The closure structure 6 has a ring 61 slidably sleeved on the stirring frame 5 and a push rod 62 for pushing the ring 61 upward. The ring 61 is made of rubber. A spring 63 is connected between the ring 61 and the stirring frame 5. A pusher is provided on the outside of the tank 1 to drive the push rod 62 to move. When the sewage flows normally, the spring 63 is in a compressed state. At this time, the gap between the ring 61 and the filter screen 21 is opened, allowing the sewage to flow down normally into the inverted conical slide 23. When the filter screen 21 is backwashed, the pusher drives the push rod 62 to push the ring 61 upward. At this time, the spring 63 is stretched until the ring 61 contacts the filter screen 21. The backwashing space 211 between the filter screen 21 and the stirring frame 5 is formed, which facilitates the flow of clean water into the backwashing space 211 to thoroughly wash the filter holes on the filter screen 21 from the inside out with high-pressure water flow. Since the ring 61 is made of rubber, the sealing between the ring 61 and the filter screen 21 is guaranteed, preventing leakage during high-pressure flushing, thereby ensuring the effectiveness and pressure of backwashing.

[0048] See Figures 3-5 and Figures 7-9 As shown, the upper surface of the inverted conical landslide 23 is provided with a number of protrusions 231 around its circumference to slow down the flow of sewage. The lower surface of the stirring frame 5 is provided with stirring strips 51 for uniformly mixing sewage and purifying agent on the inverted conical landslide 23. A return nozzle 2212 is provided on the rotating shaft 22 at a position corresponding to the position between the inverted conical landslide 23 and the positive conical landslide 24 to allow filtered water to flow back into the microbial membrane ring plate. The flow channel 221 on the rotating shaft 22 is also connected to the return pipe 4. Both the return nozzle 2212 and the backflush nozzle 2211 are provided with solenoid valves.

[0049] When sewage flows into the inverted cone-shaped landslide 23, several protrusions 231 arranged around the circumference on its upper surface effectively slow down the downward flow speed of the sewage and increase the residence time of the sewage in the purification cavity. At the same time, the lower surface of the mixing frame 5 is provided with mixing strips 51. When the rotating shaft 22 rotates, these mixing strips 51 mix the sewage and the purification agent evenly on the inverted cone-shaped landslide 23 to ensure that the two are in full contact and react.

[0050] When the filtered water needs to be treated again, the solenoid valve controls the opening of the return nozzle 2212, while the backwash nozzle 2211 is controlled to close, so that the filtered water flows back into the microbial membrane ring plate through the flow channel 221 on the rotating shaft 22 and the return pipe 4 for further treatment.

[0051] When backwashing of the filter screen 21 is required, the solenoid valve controls the backwash nozzle 2211 to open, while the return nozzle 2212 is controlled to close, so that clean water flows through the flow channel 221 on the rotating shaft 22 into the backwash space 211 formed between the filter screen 21 and the stirring frame 5 for backwashing treatment.

[0052] See Figure 3 , Figure 4 and Figures 7-9 As shown, there is a closed space between the stirring frame 5 and the rotating shaft 22. A heating coil 52 is provided in the closed space. A guide pipe 53 is provided in the flow channel 221 of the rotating shaft 22 to introduce the heating medium into the closed space for heating by the heating coil 52. When the stirring frame 5 is heated, the sewage is in a heated state, which reduces the viscosity of the sewage and allows it to fully contact the purifying agent.

[0053] The heating medium can be a liquid or a gas. When the sewage flows in the purification cavity, the heating medium introduced into the stirring frame 5 by the guide pipe 53 is temperature controlled by the heating coil 52. As the temperature of the heating coil 52 rises, the heat in the enclosed space is transferred to the stirring frame 5 through the heating medium, so that the stirring frame 5 is heated. During this process, the sewage is also indirectly heated when it flows on the inverted conical slide 23, which leads to a decrease in its viscosity, making it easier to mix and react fully with the purifying agent, and finally achieving the best contact effect between the sewage and the purifying agent.

[0054] See Figures 3-5 As shown, a sealing gasket 212 is fixed on the tank body 1 to contact the lower end of the filter screen 21 to prevent sewage from flowing out from the gap between the filter screen 21 and the tank body 1. An external discharge port 15 is opened on the tank body 1 and directly opposite the filter screen 21 for backwashing water to flow out.

[0055] When wastewater enters the tank 1 for filtration, the sealing gasket 212 between the lower end of the filter screen 21 and the tank 1 is in tight contact to prevent wastewater from flowing out through the gap between them, ensuring that all wastewater is filtered by the filter screen 21. At the same time, an external discharge port 15 is provided on the tank 1 directly opposite the lower end of the filter screen 21. When backwashing is required, high-pressure water flows out from the external discharge port 15 after passing through the filter screen 21, carrying away impurities and blockages on the surface of the filter screen 21, ensuring the cleanliness and efficient operation of the filter screen 21.

[0056] See Figure 3 , Figure 4 and Figure 10 As shown, the microbial membrane ring plate is composed of several inverted conical plates 311 that gradually decrease from top to bottom to form a stepped support platform, and each plate surface is covered with a microbial membrane.

[0057] Because the microbial membrane ring plate is composed of multiple inverted conical plates 311, and all the inverted conical plates 311 are arranged in a gradually decreasing manner from top to bottom to form a stepped support platform, the wastewater has a longer path and a longer residence time when flowing through each inverted conical plate 311, which increases the contact area between the wastewater and the microbial membrane, thereby improving the degradation efficiency of pollutants.

[0058] The microbial film on each plate can continuously and efficiently degrade organic matter and other pollutants. As wastewater flows through each stage, pollutants are gradually removed, ultimately achieving a highly efficient wastewater treatment effect.

[0059] See Figure 3 , Figure 4 and Figure 10 As shown, on the conical landslide 24, there is a conical plate 321 between every two adjacent inverted conical plates 311 to prevent sewage from splashing directly onto the bottom of the tank 1.

[0060] When wastewater flows between the inverted conical plates 311 of the microbial membrane ring plate, a positive conical plate 321 is provided between every two adjacent inverted conical plates 311, thus preventing wastewater from splashing directly to the bottom of the tank 1 during the flow. This ensures that the wastewater can flow step by step along the predetermined path and fully contact the microbial membrane, so that the pollutants in the wastewater can be degraded and treated more effectively, while avoiding the problems of uneven treatment and reduced efficiency caused by splashing.

[0061] See Figure 3 , Figure 4 and Figure 10 As shown, each conical plate 321 has a stirring rod 322 extending along the direction of the corresponding inverted conical plate 311, and all the stirring rods 322 constitute the stirring structure 32.

[0062] When wastewater flows between the inverted conical plates 311 of the microbial membrane ring plate, several stirring rods 322 extend from each positive conical plate 321 along the direction of the corresponding inverted conical plate 311, forming a complete stirring structure 32. As the wastewater flows through each inverted conical plate 311, the stirring rods 322 can effectively agitate the water flow, ensuring that the wastewater is in full contact with the microbial membrane, preventing pollutant deposition, and promoting oxygen dissolution, thereby improving the metabolic efficiency of microorganisms and the effect of wastewater treatment.

[0063] A wastewater treatment and reuse method, applied to a wastewater treatment and reuse device, includes the following steps:

[0064] S1. Start the rotating shaft 22 to drive the filter screen 21 to rotate and fully contact the sewage to remove large particulate impurities and suspended solids;

[0065] S2. The pre-filtered wastewater enters the microbial membrane ring plate for further decomposition of harmful substances in the wastewater;

[0066] S3. The stirring structure 32 rotates with the rotating shaft 22, distributing the sewage evenly on the microbial membrane ring plate;

[0067] S4 and reflux pipe 4 pump the filtered water at the bottom of tank 1 back to the microbial membrane ring plate to form a circulating filtration state.

[0068] This invention uses a conical filter 21 that rotates under the drive of a rotary driver to effectively remove large particulate impurities and suspended solids, ensuring initial purification. Subsequently, the wastewater flows into the inverted conical microbial membrane ring plate in the lower half of the tank 1. The microbial membrane ring plate carries a large number of microbial communities that decompose organic matter. In conjunction with the stirring structure 32 on the rotating shaft 22, the wastewater is evenly distributed and fully contacts the microorganisms, improving the decomposition efficiency of organic pollutants.

[0069] As the return pipe 4 pumps the filtered water from the bottom back to the microbial membrane ring plate, a circulating filtration state is formed, ensuring that pollutants that are difficult to remove in one go are treated multiple times, which greatly improves the purification effect.

[0070] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A wastewater treatment and reuse device, comprising a tank (1) having an inlet (11) and an outlet (12), wherein the tank (1) is provided with a wastewater purification mechanism; Its features are, The wastewater purification mechanism includes a primary filtration assembly (2) located in the upper half of the tank (1) and a secondary filtration assembly (3) located in the lower half of the tank (1). The primary filtration assembly (2) includes a filter screen (21) and a rotating shaft (22) for driving the filter screen (21) to rotate. The tank (1) is provided with a rotary drive for driving the rotating shaft (22) to rotate. The secondary filtration assembly (3) includes a microbial membrane ring plate fixedly connected to the tank (1) and a stirring structure (32) provided on the rotating shaft (22) for rotating with the rotating shaft (22) to fully distribute the wastewater on the microbial membrane ring plate. The filter screen (21) has a positive conical structure, and the microbial membrane ring plate has an inverted conical structure; A return pipe (4) is connected between the bottom and top of the tank (1) to guide the filtered water at the bottom of the tank (1) back to the secondary filter assembly (3). The return pipe (4) has a water pump to provide water flow power. When the return pipe (4) guides the filtered water back to the secondary filter assembly (3), the sewage is in a circulating filtration state. A stirring frame (5) located in the purification cavity is fixed on the rotating shaft (22). The stirring frame (5) has an upper surface parallel to the filter screen (21) and a lower surface parallel to the inverted conical slope (23). A blocking structure (6) that can prevent clean water from flowing down is provided between the stirring frame (5) and the filter screen (21). When the blocking structure (6) blocks the lower end of the stirring frame (5) and the filter screen (21), a backwashing space (211) is formed between the upper surface of the stirring frame (5) and the filter screen (21). A flow channel (221) is opened from the upper end of the rotating shaft (22) downwards. A backwash nozzle (2211) is opened on the rotating shaft (22) at the position corresponding to the backwashing space (211) for clean water to be discharged into it. A water filling port (14) that can allow clean water to be introduced into the flow channel (221) is opened at the top of the tank (1).

2. The wastewater treatment and reuse equipment according to claim 1, characterized in that, The primary filtration assembly (2) also includes an inverted conical slope (23) located directly below the filter screen (21) and fixedly connected to the tank (1). A positive conical slope (24) is fixedly provided on the rotating shaft (22) below the inverted conical slope (23) to guide the sewage to flow toward the microbial membrane ring plate. A gap is left between the inverted conical slope (23) and the positive conical slope (24) for the sewage to fall. A dosing port (13) for adding purifying agent is opened on the tank (1) between the filter screen (21) and the inverted conical slope (23). A purification cavity for mixing sewage and purifying agent is formed between the filter screen (21) and the inverted conical slope (23).

3. The wastewater treatment and reuse equipment according to claim 2, characterized in that, The upper surface of the inverted cone landslide (23) is provided with several protrusions (231) around its circumference to slow down the flow of sewage. The lower surface of the mixing frame (5) is provided with a mixing strip (51) to mix sewage and purifying agent evenly on the inverted cone landslide (23). A return nozzle (2212) is provided on the rotating shaft (22) at the position between the inverted cone landslide (23) and the positive cone landslide (24) for the filtered water to flow back into the microbial membrane ring plate. The flow channel (221) on the rotating shaft (22) is also connected to the return pipe (4). Both the return nozzle (2212) and the backflush nozzle (2211) are provided with solenoid valves.

4. The wastewater treatment and reuse equipment according to claim 1, characterized in that, The space between the stirring frame (5) and the rotating shaft (22) is a closed space. A heating coil (52) is provided in the closed space. A guide pipe (53) is provided in the flow channel (221) of the rotating shaft (22) to pass the heating medium into the closed space for heating by the heating coil (52). When the stirring frame (5) is heated, the sewage is in a heated state, which reduces the viscosity of the sewage and allows it to fully contact the purifying agent.

5. A wastewater treatment and reuse device according to claim 1, characterized in that, A sealing gasket (212) is fixed on the tank (1) and contacts the lower end of the filter screen (21) to prevent sewage from flowing out from the gap between the filter screen (21) and the tank (1). An external discharge port (15) for backwashing water is opened on the tank (1) and directly opposite the lower end of the filter screen (21).

6. The wastewater treatment and reuse equipment according to claim 1, characterized in that, The microbial membrane ring plate is composed of several inverted conical plates (311) that gradually decrease from top to bottom to form a stepped support platform, and each plate surface is covered with a microbial membrane.

7. A wastewater treatment and reuse device according to claim 6, characterized in that, On the conical landslide (24), there is a conical plate (321) between each two adjacent inverted conical plates (311) to prevent sewage from splashing directly onto the bottom of the tank (1).

8. A wastewater treatment and reuse device according to claim 7, characterized in that, Each conical plate (321) has a stirring rod (322) extending along the direction of the corresponding inverted conical plate (311), and all the stirring rods (322) constitute the stirring structure (32).

9. A wastewater treatment and reuse method, applied to a wastewater treatment and reuse device according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Start the rotating shaft (22) to drive the filter screen (21) to rotate and fully contact the sewage to remove large particulate impurities and suspended solids; S2. The pre-filtered wastewater enters the microbial membrane ring plate for further decomposition of harmful substances in the wastewater; S3. The stirring structure (32) rotates with the rotating shaft (22) to evenly distribute the sewage on the microbial membrane ring plate; S4, the return pipe (4) pumps the filtered water at the bottom of the tank (1) back to the microbial membrane ring plate to form a circulating filtration state.

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