High-concentration ammonia-nitrogen and COD wastewater treatment process

Abstract

The application provides a high-concentration ammonia nitrogen and COD wastewater treatment process, S1, flocculation treatment: high-concentration ammonia nitrogen and COD wastewater is sent into a conditioning tank through a water inlet pipe to adjust water quality and quantity, a flocculating agent is added into the conditioning tank through a flocculating agent feeding port to perform pretreatment, after a sedimentation time, a second electric push rod moves a sieve plate upwards, the sieve plate filters the precipitate and suspended impurities, the sieve plate filters the precipitate and suspended impurities, and the suspended solids content, metal ions and coarse suspended solids in the wastewater are removed; through the process flow of the conditioning tank, an anaerobic reactor, a high-level oxidation device, a pH conditioning tank and a sedimentation tank, the high-concentration ammonia nitrogen and COD in the wastewater can be effectively removed, meanwhile, a turning assembly in the sedimentation tank can store the wastewater in different accommodating cavities, the time for static sedimentation is given, the clear liquid is returned to the conditioning tank, mixed with newly added wastewater, further treated, and the treatment efficiency and treatment effect of the wastewater are improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically a process for treating wastewater with high concentrations of ammonia nitrogen and COD. Background Technology

[0002] High concentration refers to wastewater containing a large amount of organic matter, characterized by a high COD value, often exceeding 10,000. For this type of wastewater, simple aerobic biological treatment is insufficient to achieve discharge standards. High ammonia nitrogen refers to a high content of NH4+ in the water, which has a strong inhibitory effect on anaerobic methanogenesis. Recalcitrant refers to wastewater containing few components that can be directly utilized by microorganisms, with a low B / C ratio, making it unsuitable for biological treatment and often requiring pretreatment to improve its biodegradability. After years of research, water treatment professionals have developed relatively mature processes for treating industrial wastewater with any of these single characteristics.

[0003] However, with the industrialization of production volume and the diversification of products, industrial wastewater now often has all three characteristics mentioned above. The original mature treatment processes are far from meeting the requirements for the discharge of such wastewater. The common technical approach is to remove high concentrations of ammonia nitrogen and COD from the wastewater by flocculation sedimentation filtration, combined with aerobic and anaerobic treatment. However, the existing technical methods are slow and have insufficient treatment effect on wastewater, with a long waiting time. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a high-concentration ammonia nitrogen and COD wastewater treatment process to solve the problems mentioned in the background art. Through a process flow consisting of an equalization tank, an anaerobic reactor, an advanced oxidation device, a pH equalization tank, and a sedimentation tank, high-concentration ammonia nitrogen and COD in wastewater can be effectively removed. At the same time, the diversion component in the sedimentation tank can store wastewater in different containment chambers, allowing time for settling. The clarified liquid is then returned to the equalization tank to mix with newly added wastewater for further treatment, thereby improving the wastewater treatment efficiency and effect.

[0005] To achieve the above objectives, the present invention provides a high-concentration ammonia nitrogen and COD wastewater treatment process, comprising the following steps:

[0006] S1. Flocculation Treatment: Wastewater containing high concentrations of ammonia nitrogen and COD is sent to the equalization tank through the inlet pipe to adjust the water quality and quantity. Flocculation agent is added to the tank through the flocculant inlet for pretreatment. After a settling time, the second electric push rod moves the screen plate up, which filters out the sediment and suspended impurities, removing suspended solids, metal ions, and large suspended solids from the wastewater.

[0007] S2, Secondary Treatment: The pretreated wastewater is pumped and piped into an anaerobic reactor for anaerobic treatment. The effluent from the anaerobic reactor enters an advanced oxidation unit system. In the advanced oxidation unit, Fenton's reagent is added to degrade the pollutants in the wastewater that are difficult to biodegrade. After that, the effluent enters a pH adjustment tank to adjust the pH value to 8-9. The effluent then enters a sedimentation tank for sedimentation. During the process of adding Fenton's reagent and adjusting the pH value, the additives are fully mixed and reacted with the wastewater by the stirring components.

[0008] S3. Sedimentation treatment: The inlet pipe and the outlet pipe connected to the pH adjustment tank are turned by the turning component at the top of the sedimentation tank, so that the first and second branches of the inlet and outlet pipes inside the sedimentation tank alternately correspond to different receiving chambers, and the wastewater that has been pH adjusted is sent into different receiving chambers to allow time for settling.

[0009] S4. Wastewater backflow mixing: The position after the second branch pipe of the outgoing pipe is rotated is the settled container. The upper end of the vertical pipe in the container is connected to the second branch pipe. The upper clear liquid after sedimentation in the container is pumped out by the water pump and returned to the equalization tank. It is mixed with the newly added wastewater for further treatment. The remaining sediment in the container after the clear liquid has been pumped out is discharged through the bottom drain.

[0010] S5. Sedimentation treatment in the equalization tank: Control the screen plate in the equalization tank to move upward. The screen plate will filter the sediment and suspended impurities. After opening the opening on the side of the equalization tank, push the screen plate to move outward. The screen plate and the filtered material are sent out through one side of the opening of the sealing plate. Then, manually clean the sediment and impurities to keep the screen plate free of sediment and impurities.

[0011] Furthermore, in step S1, the flocculant is added by a second toothed ring at the bottom of the flocculant inlet. The bottom of the second toothed ring is provided with an inclined conveying plate. The first motor drives the first gear to rotate and mesh with the first toothed ring. The first toothed ring drives the conveying plate to rotate, so that the flocculant is evenly spread inside the regulating tank.

[0012] Furthermore, during the addition of Fenton's reagent and pH adjustment in step S2, a stirrer is installed inside the advanced oxidation device and the pH adjustment tank. The stirrer is driven to rotate by a second motor, which accelerates the mixing efficiency of wastewater and additives when adding Fenton's reagent and adjusting pH in the advanced oxidation device and the pH adjustment tank.

[0013] Furthermore, in step S3, the wastewater is sent into the sedimentation tank, and the second gear is driven to rotate by the third motor. The second gear meshes with the second gear ring, and the second gear ring drives the two sets of mounting brackets to rotate, so that the first branch pipe corresponds to different receiving chambers. The wastewater in the pH adjustment tank is sent to different receiving chambers through the inlet pipe and the first branch pipe by the water pump to allow time for settling.

[0014] Furthermore, in step S4, the settled clear water is returned to the position of the second branch pipe after rotation, which is the settled receiving cavity. The third electric push rod drives the connector to rise, and the connector is inserted into the inlet end of the second branch pipe. The upper clear liquid after sedimentation in the receiving cavity is pumped out by the water pump and returned to the regulating tank to be mixed with the newly added wastewater for further treatment.

[0015] Furthermore, during the wastewater inlet and outlet processes, the first and second branch pipes are connected to the corresponding inlet and outlet pipes via mounting brackets. Both of them rotate synchronously, in the same direction, and on the same axis with the center of the second toothed ring as the rotation base point. The wastewater inlet and the extraction of the clarified liquid after sedimentation do not affect each other.

[0016] Furthermore, during the process of connecting the connector to the second branch pipe, the connector and the vertical pipe are connected by a corrugated pipe. Therefore, the connector can be inserted into the inlet end of the second branch pipe by the push of the third electric push rod, and will not be disconnected from the connection with the vertical pipe. The bottom of the vertical pipe is located at the lowest water level of the clear liquid after sedimentation.

[0017] Furthermore, after cleaning the sieve plate in step S5 and waiting for the flocculation to finish, the second electric push rod moves the sieve plate up. The sieve plate filters the sediment and suspended impurities. The first electric push rods on both sides of the top of the equalization tank drive the moving plate to move outward from the top of the equalization tank. The sieve plate and the filtered material are sent out through one side of the opening.

[0018] Furthermore, the opening on the side of the equalization tank is sealed by a sealing plate during wastewater flocculation and sedimentation, and can be manually opened to allow the screen plate and sediment to be discharged when cleaning the sediment from the screen plate.

[0019] Furthermore, the anaerobic reactor is connected to the bottom outlet of the equalization tank via a pipeline, the inlet of the advanced oxidation unit is connected to the outlet of the anaerobic reactor via a pipeline, and the inlet of the pH equalization tank is connected to the outlet of the advanced oxidation unit via a pipeline.

[0020] The beneficial effects of this invention: This invention provides a high-concentration ammonia nitrogen and COD wastewater treatment process, comprising: an equalization tank; an inlet pipe; a first electric actuator; a moving plate; a second electric actuator; a first motor; a flocculant inlet; a sealing plate; a first gear ring; a first gear; a conveying plate; a sieve plate; an anaerobic reactor; an advanced oxidation device; a Fenton reagent addition device; a pH adjustment tank; an acid-base addition device; a sedimentation tank; a discharge outlet; an inlet pipe; a first branch pipe; an outlet pipe; a second branch pipe; a partition; a vertical pipe; a horizontal plate; a third electric actuator; a connecting joint; a stirring assembly; a second motor; a stirring frame; a steering assembly; a third motor; a second gear; a second gear ring; and a mounting frame.

[0021] 1. In this invention, the second electric push rod moves the screen plate upward, the screen plate filters the sediment and suspended impurities, the squeeze conveying plate folds them, and after the sealing plate is opened, the first electric push rod drives the moving plate to move outward from the top of the regulating tank, and the screen plate and the filtered material are sent out through one side of the opening of the sealing plate, which is convenient for manual cleaning of sediment impurities.

[0022] 2. In this invention, a first motor drives a first gear to rotate and mesh with a first gear ring. The first gear ring drives a conveyor plate to rotate, which evenly spreads the flocculant inside the equalization tank, thereby accelerating the efficiency of wastewater mixing with the flocculant to form sediment.

[0023] 3. The present invention connects to the corresponding inlet and outlet pipes via the mounting bracket. Both pipes rotate synchronously, in the same direction, and on the same axis with the center of the second toothed ring as the rotation base. The pH-adjusted wastewater is sent into different containment chambers to allow time for settling and sedimentation without affecting the settling wastewater.

[0024] 4. Compared with the prior art, the present invention can effectively remove high concentrations of ammonia nitrogen and COD from wastewater through the process flow of equalization tank, anaerobic reactor, advanced oxidation device, pH equalization tank and sedimentation tank. At the same time, the diversion component in the sedimentation tank can store wastewater in different containment chambers, allowing time for static sedimentation, and then return the clear liquid to the equalization tank to mix with newly added wastewater for further treatment, thereby improving the wastewater treatment efficiency and effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the manufacturing process for a high-concentration ammonia nitrogen and COD wastewater treatment process according to the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of a high-concentration ammonia nitrogen and COD wastewater treatment process according to the present invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of the equalization tank in a high-concentration ammonia nitrogen and COD wastewater treatment process of the present invention.

[0028] Figure 4 This is a schematic diagram of the stirring component structure of a high-concentration ammonia nitrogen and COD wastewater treatment process of the present invention;

[0029] Figure 5 This is a schematic diagram of the external structure of the sedimentation tank in a high-concentration ammonia nitrogen and COD wastewater treatment process according to the present invention.

[0030] Figure 6 This is one of the schematic diagrams of the internal structure of the sedimentation tank in a high-concentration ammonia nitrogen and COD wastewater treatment process of the present invention;

[0031] Figure 7This is the second schematic diagram of the internal structure of the sedimentation tank in a high-concentration ammonia nitrogen and COD wastewater treatment process of the present invention.

[0032] In the diagram: 1. Equalization tank; 11. Inlet pipe; 12. First electric actuator; 13. Moving plate; 14. Second electric actuator; 15. First motor; 16. Flocculant inlet; 17. Sealing plate; 18. First gear ring; 19. First gear; 110. Conveying plate; 111. Sieve plate; 2. Anaerobic reactor; 3. Advanced oxidation device; 31. Fenton's reagent addition device; 4. pH adjustment tank; 41. Acid-base addition device; 5. Sedimentation tank; 51. Sewage outlet; 52. Feed pipe; 521. First branch pipe; 53. Discharge pipe; 531. Second branch pipe; 54. Baffle plate; 55. Vertical pipe; 56. Horizontal plate; 57. Third electric actuator; 58. Connecting joint; 6. Stirring assembly; 61. Second motor; 62. Stirring frame; 7. Steering assembly; 71. Third motor; 72. Second gear; 73. Second gear ring; 74. Mounting frame. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] Please see Figures 1 to 7 This invention provides a technical solution: a process for treating high-concentration ammonia nitrogen and COD wastewater, the process comprising the following steps:

[0035] S1. Flocculation treatment: Wastewater containing high concentrations of ammonia nitrogen and COD is sent into the equalization tank 1 through the inlet pipe 11 to adjust the water quality and quantity. Flocculation agent is added to the tank through the flocculant inlet 16 for pretreatment. After a settling time, the sieve plate 111 filters the sediment and suspended impurities, removing suspended solids, metal ions, and coarse suspended solids from the wastewater.

[0036] S2, Secondary Treatment: The pretreated wastewater is pumped and piped into anaerobic reactor 2 for anaerobic treatment. The effluent from anaerobic reactor 2 enters the advanced oxidation unit 3 system. In the advanced oxidation unit 3, Fenton's reagent is added to degrade the pollutants in the wastewater that are difficult to biodegrade. Then, the effluent enters pH adjustment tank 1 to adjust the pH value to 8-9. The effluent then enters sedimentation tank 5 for sedimentation. During the process of adding Fenton's reagent and adjusting the pH value, the stirring component 6 ensures that the additives are fully mixed and reacted with the wastewater.

[0037] S3, Sedimentation treatment: The inlet pipe 52 and the outlet pipe 53 connected to the pH adjustment tank 1 are turned by the turning component 7 at the top of the sedimentation tank 5, so that the first branch pipe 521 and the second branch pipe 531 inside the sedimentation tank 5 alternately correspond to different receiving chambers, and the wastewater that has been pH adjusted is sent into different receiving chambers to allow time for settling.

[0038] S4. Wastewater backflow mixing: The position of the second branch pipe 531 after rotation from the outlet pipe 53 is the settled container. The upper end of the vertical pipe 55 in the container is connected to the second branch pipe 531. The upper clear liquid after sedimentation in the container is pumped out by a water pump and returned to the equalization tank 1 to mix with the newly added wastewater for further treatment. The remaining sediment in the container from which the clear liquid has been extracted is discharged through the drain port 51 at the bottom.

[0039] S5. Sedimentation treatment in equalization tank 1: Control the upward movement of the sieve plate 111 in equalization tank 1. The sieve plate 111 filters the sediment and suspended impurities. After opening the opening on the side of equalization tank 1, push the sieve plate 111 to move outward. The sieve plate 111 and the filtered material are sent out through one side of the opening of the sealing plate 17. Then, manually clean the sediment and impurities to keep the sieve plate 111 free of sediment and impurities.

[0040] A high-concentration ammonia nitrogen and COD wastewater treatment process includes an equalization tank 1. A movable plate 13 is slidably inserted into the middle of the top of the equalization tank 1, and second electric push rods 14 are fixed on both sides of the top of the movable plate 13. The extended ends of the second electric push rods 14 penetrate into the equalization tank 1 and are fixed with screen plates 111. A flocculant inlet 16 is opened on the middle top surface of the movable plate 13, and a first toothed ring 18 is rotatably mounted on the movable plate 13 at the bottom of the flocculant inlet 16 via a bearing. The bottom of the movable plate 13 is rotatably mounted on one side of the first toothed ring 18 via a bearing. A first gear 19 is provided, and the first gear 19 meshes with a first gear ring 18. A first motor 15 is fixed to the top of the moving plate 13, and the output end of the first motor 15 is fixedly connected to the first gear 19. A conveying plate 110 is rotatably mounted on the bottom of the first gear ring 18 through a bearing and a torsion spring. A sealing plate 17 is sealed on the top side of the regulating pool 1. First electric push rods 12 are fixed on both sides of the top of the regulating pool 1, and the first electric push rods 12 are fixedly connected to one end of the moving plate 13. A water inlet pipe 1 is provided on the top of the regulating pool 1 on one side of the moving plate 13. 1. Wastewater enters the equalization tank 1 through the inlet pipe 11. Flocculant is added through the flocculant inlet 16. At this time, the screen plate 111 is located at the bottom of the equalization tank 1, and the conveyor plate 110 is in an extended inclined position. The first motor 15 drives the first gear 19 to rotate and mesh with the first gear ring 18. The first gear ring 18 drives the conveyor plate 110 to rotate, evenly spreading the flocculant inside the equalization tank 1, accelerating the efficiency of wastewater and flocculant mixing to form sediment. After the flocculation is completed, the second electric push rod 14 moves the screen plate 111 upward. The screen plate 111 filters the sediment and suspended impurities and squeezes them out. After the conveyor plate 110 is folded and the sealing plate 17 is opened, the first electric push rod 12 drives the moving plate 13 to move outward from the top of the equalization tank 1. The screen plate 111 and the filter material are sent out through one side of the opening of the sealing plate 17, which facilitates manual cleaning of sedimented impurities, pretreatment, and removal of suspended solids, metal ions and coarse suspended solids from the wastewater. (The opening on the side of the equalization tank 1 is sealed by the sealing plate 17 when the wastewater is flocculated and settled. When cleaning the sediment on the screen plate 111, it is opened manually to allow the screen plate 111 and sediment to be sent out.)

[0041] In this embodiment, an anaerobic reactor 2 is installed on one side of the equalization tank 1, and the anaerobic reactor 2 is connected to the bottom outlet of the equalization tank 1 through a pipe (the working principle of the anaerobic reactor 2 in this scheme is the same as that of the prior art). An advanced oxidation device 3 is installed on the other side of the anaerobic reactor 2, and a Fenton reagent addition device 31 is installed on the top of the advanced oxidation device 3. The inlet of the advanced oxidation device 3 is connected to the outlet of the anaerobic reactor 2 through a pipe. A pH adjustment tank 4 is installed on one side of the advanced oxidation device 3, and an acid-base addition device 41 is installed on the top of the pH adjustment tank 4. A sedimentation tank 5 is installed on one side of the pH adjustment tank 4. Fenton reagent is added through the Fenton reagent addition device 31 to degrade the pollutants in the wastewater that are difficult to biodegrade. After that, the effluent enters the pH adjustment tank 1 to adjust the pH value to 8-9, and the effluent enters the sedimentation tank 5 for sedimentation, effectively removing COD and NH3-N from the wastewater.

[0042] In this embodiment, both the advanced oxidation device 3 and the pH adjustment tank 4 are equipped with stirring components 6. The stirring components 6 include a second motor 61, which is installed on the top of the advanced oxidation device 3 and the pH adjustment tank 4. Inside the advanced oxidation device 3 and the pH adjustment tank 4, a stirring frame 62 is rotatably installed via bearings. The stirring frame 62 is fixedly connected to the second motor 61. The second motor 61 drives the stirring frame 62 to rotate, which accelerates the mixing of wastewater and additives when Fenton's reagent is added and the pH is adjusted in the advanced oxidation device 3 and the pH adjustment tank 4.

[0043] In this embodiment, the sedimentation tank 5 is equipped with four partitions 54, and the interior of the sedimentation tank 5 is divided into four accommodating chambers by the partitions 54. An inlet pipe 52 is fixed to the outlet end of the pH adjustment tank 4, and the inlet pipe 52 passes through the center of the top of the sedimentation tank 5. An outlet pipe 53 is provided at the top of the adjustment tank 1, and the other end of the outlet pipe 53 passes through the sedimentation tank 5 and is vertically aligned with the inlet pipe 52. Both the inlet pipe 52 and the outlet pipe 53 are equipped with mounting brackets 74 via bearings for rotational sealing. The mounting bracket 74 of the inlet pipe 52 is connected to a mounting plate... The sedimentation tank 5 is equipped with a first branch pipe 521, and a second branch pipe 531 is connected to the mounting bracket 74 of the outlet pipe 53. The first branch pipe 521 and the second branch pipe 531 are arranged vertically. The bottom outer wall of the sedimentation tank 5 has a drain outlet 51 corresponding to the four receiving chambers. The wastewater with pH adjustment is sent into the four receiving chambers of the sedimentation tank 5 through the inlet pipe 52 for static sedimentation. The sedimented receiving chambers are returned to the equalization tank 1 through the second branch pipe 531 and the outlet pipe 53 to mix with the newly added wastewater for further treatment.

[0044] In this embodiment, a steering assembly 7 is provided at the top of the sedimentation tank 5. The steering assembly 7 includes a second gear ring 73. The second gear ring 73 is rotatably mounted on the top of the sedimentation tank 5 via a bearing, and the second gear ring 73 wraps around the outside of the feed pipe 52 and is fixedly connected to two mounting brackets 74. A second gear 72 is rotatably mounted on one side of the top of the sedimentation tank 5 via a bearing, and the second gear 72 meshes with the second gear ring 73. A third motor 71 is fixed at the position corresponding to the second gear 72 on the top of the sedimentation tank 5, and the output end of the third motor 71 is fixed to the second gear 72. The third motor 71 drives the second gear 72 to rotate, and the second gear 72 meshes with the second gear ring 73. In turn, the second gear ring 73 drives the two sets of mounting brackets 74 to rotate, so that the first branch pipe 521 and the second branch pipe 531 alternately correspond to different receiving cavities (the first branch pipe 521 and the second branch pipe 531 are connected to the corresponding feed pipe 52 and feed pipe 53 via the mounting brackets 74, and both rotate around the center of the second gear ring 73). The system uses a dynamic base point (maintaining synchronous, co-directional, and coaxial rotation) to send the pH-adjusted wastewater into different containment chambers for settling time without affecting the settled wastewater. Each containment chamber has a horizontal plate 56 fixed between partitions 54, and a vertical pipe 55 fixed inside the horizontal plate 56. Two sets of third electric push rods 57 are fixed to the top of the horizontal plate 56. A connector 58 is installed at the top of the vertical pipe 55 via a corrugated pipe, and the connector 58 can be sealed and inserted into the inlet of the second branch pipe 531. The extended end of the third electric push rod 57 is fixed to the connector 58. The position of the second branch pipe 531 after rotation is the containment chamber where the settling is complete. The third electric push rod 57 drives the connector 58 to rise, and the corrugated pipe unfolds to maintain communication between the vertical pipe 55 and the connector 58. The connector 58 is inserted into the inlet of the second branch pipe 531. A water pump extracts the supernatant after sedimentation in the containment chamber and returns it to the equalization tank 1 to mix with the newly added wastewater for further treatment, thus improving the wastewater treatment efficiency and effect.

[0045] Wastewater enters the equalization tank 1 through the inlet pipe 11. Flocculant is added through the flocculant inlet 16. At this time, the sieve plate 111 is at the bottom of the equalization tank 1, and the conveyor plate 110 is in an extended inclined position. The first motor 15 drives the first gear 19 to rotate and mesh with the first gear ring 18. The first gear ring 18 drives the conveyor plate 110 to rotate, evenly spreading the flocculant inside the equalization tank 1, accelerating the efficiency of wastewater and flocculant mixing to form sedimentation. Fenton reagent is added through the Fenton reagent addition device 31 to degrade the pollutants in the wastewater that are difficult to biodegrade. After that, the effluent enters the pH equalization tank 1 to adjust the pH value to 8-9. The effluent then enters the sedimentation tank 5 for sedimentation, effectively removing COD and NH3-N from the wastewater. The third motor 71 drives the second gear 72 to rotate. The second gear 72 meshes with the second gear ring 73, which in turn drives the two sets of mounting brackets 74 to rotate, causing the first branch pipe 521 and the second branch pipe 5 to rotate. 31 alternately corresponds to different receiving chambers, and the wastewater with pH adjusted is sent into different receiving chambers to allow for settling time without affecting the settling wastewater. The position of the second branch pipe 531 after rotation is the receiving chamber after settling. The third electric push rod 57 drives the connector 58 to rise, and the corrugated pipe unfolds to keep the vertical pipe 55 connected to the connector 58. The connector 58 is inserted into the inlet end of the second branch pipe 531. The upper clear liquid after settling in the receiving chamber is pumped out by the water pump and returned to the inside of the equalization tank 1 to mix with the newly added wastewater for further treatment. After waiting for the flocculation to finish, the second electric push rod 14 moves the screen plate 111 upward. The screen plate 111 filters the sediment and suspended impurities. The squeeze conveying plate 110 folds it. After opening the sealing plate 17, the first electric push rod 12 drives the moving plate 13 to move from the top of the equalization tank 1 to the outside. The screen plate 111 and the filtered material are sent out through one side of the opening of the sealing plate 17, which is convenient for manual cleaning of sediment impurities.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A process for treating wastewater with high concentrations of ammonia nitrogen and COD, characterized in that: The processing steps are as follows: S1. Flocculation Treatment: Wastewater containing high concentrations of ammonia nitrogen and COD is sent into the equalization tank through the inlet pipe to adjust the water quality and quantity. Flocculation agent is added through the flocculant inlet for pretreatment. After settling time, the second electric push rod moves the screen plate up, filtering out the sediment and suspended impurities, thus removing suspended solids, metal ions, and large suspended solids from the wastewater. S2, Secondary Treatment: The pretreated wastewater is pumped and piped into an anaerobic reactor for anaerobic treatment. The effluent from the anaerobic reactor enters an advanced oxidation unit system. In the advanced oxidation unit, Fenton's reagent is added to degrade the pollutants in the wastewater that are difficult to biodegrade. After that, the effluent enters a pH adjustment tank to adjust the pH value to 8-9. The effluent then enters a sedimentation tank for sedimentation. During the process of adding Fenton's reagent and adjusting the pH value, the additives are fully mixed and reacted with the wastewater by the stirring components. S3. Sedimentation treatment: The inlet pipe and the outlet pipe connected to the pH adjustment tank are turned by the turning component at the top of the sedimentation tank. The first and second branches of the inlet and outlet pipes inside the sedimentation tank rotate synchronously, in the same direction and on the same axis, and alternately correspond to different receiving chambers. The process of wastewater inlet and clear liquid extraction after sedimentation do not affect each other. The wastewater after pH adjustment is sent into different receiving chambers to allow time for settling. S4. Wastewater backflow mixing: The position after the second branch pipe of the outgoing pipe is rotated is the settled container. The upper end of the vertical pipe in the container is connected to the second branch pipe. The upper clear liquid after sedimentation in the container is pumped out by the water pump and returned to the equalization tank. It is mixed with the newly added wastewater for further treatment. The remaining sediment in the container after the clear liquid has been pumped out is discharged through the bottom drain. S5. Sedimentation treatment in the equalization tank: Control the screen plate in the equalization tank to move up. The screen plate will filter the sediment and suspended impurities. After opening the opening on the side of the equalization tank, push the screen plate to move outward. The screen plate and the filtered material are sent out through one side of the opening of the sealing plate. Then, manually clean the sediment and impurities to keep the screen plate free of sediment and impurities. The third electric push rod drives the connector to rise. During the process of the connector connecting with the second branch pipe, the connector and the vertical pipe are connected through a corrugated pipe. Therefore, the connector can be inserted into the inlet end of the second branch pipe as the third electric push rod pushes it, and will not be disconnected from the connection with the vertical pipe. The bottom of the vertical pipe is located at the lowest water level of the clear liquid after sedimentation.

2. The high-concentration ammonia nitrogen and COD wastewater treatment process according to claim 1, characterized in that: In step S1, the flocculant is added. A first toothed ring is set at the bottom of the flocculant inlet. An inclined conveying plate is set at the bottom of the first toothed ring. The first motor drives the first gear to rotate and mesh with the first toothed ring. The first toothed ring drives the conveying plate to rotate, so that the flocculant is evenly sprinkled inside the equalization tank.

3. The high-concentration ammonia nitrogen and COD wastewater treatment process according to claim 1, characterized in that: In step S2, during the addition of Fenton's reagent and pH adjustment, a stirrer is installed inside the advanced oxidation device and pH adjustment tank. The stirrer is driven to rotate by a second motor, which accelerates the mixing efficiency of wastewater and additives when adding Fenton's reagent and adjusting pH in the advanced oxidation device and pH adjustment tank.

4. The high-concentration ammonia nitrogen and COD wastewater treatment process according to claim 1, characterized in that: In step S3, the wastewater is sent into the sedimentation tank. The second gear is driven to rotate by the third motor. The second gear meshes with the second gear ring, which in turn drives the two sets of mounting brackets to rotate, so that the first branch pipe corresponds to different receiving chambers. The wastewater in the pH adjustment tank is sent to different receiving chambers through the inlet pipe and the first branch pipe by the water pump to allow time for settling.

5. The high-concentration ammonia nitrogen and COD wastewater treatment process according to claim 4, characterized in that: In step S4, the clear water after sedimentation is returned. The position of the second branch pipe after rotation is the settling chamber. The connector is inserted into the inlet end of the second branch pipe, and the upper clear liquid after sedimentation in the settling chamber is pumped out by the water pump and returned to the equalization tank to be mixed with the newly added wastewater for further treatment.

6. The high-concentration ammonia nitrogen and COD wastewater treatment process according to claim 5, characterized in that: During the wastewater inlet and outlet process, the first branch pipe and the second branch pipe are connected to the corresponding inlet pipe and outlet pipe through the mounting bracket, and both of them take the center of the second toothed ring as the rotation base.

7. The high-concentration ammonia nitrogen and COD wastewater treatment process according to claim 1, characterized in that: In step S5, after the flocculation is completed, the second electric push rod moves the screen plate up. The screen plate filters the sediment and suspended impurities. The first electric push rods on both sides of the top of the equalization tank drive the moving plate to move outward from the top of the equalization tank. The screen plate and the filtered material are sent out through one side of the opening.

8. The high-concentration ammonia nitrogen and COD wastewater treatment process according to claim 1, characterized in that: The opening on the side of the equalization tank is sealed by a sealing plate during wastewater flocculation and sedimentation. When cleaning impurities from the sieve plate, the opening is manually opened to allow the sieve plate and sediment to be discharged.

9. The wastewater treatment process for high-concentration ammonia nitrogen and COD according to claim 1, characterized in that: The anaerobic reactor is connected to the bottom outlet of the equalization tank via a pipeline, the inlet of the advanced oxidation unit is connected to the outlet of the anaerobic reactor via a pipeline, and the inlet of the pH equalization tank is connected to the outlet of the advanced oxidation unit via a pipeline.

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