A landfill leachate treatment equipment

Abstract

This invention relates to the field of waste treatment technology and discloses a landfill leachate treatment equipment, comprising an outer shell. From back to front, a regulating tank, a first reaction tank, a second reaction tank, and a sedimentation tank are sequentially arranged on the left side of the outer shell. An anaerobic tank and an aerobic tank are arranged in the middle of the outer shell, with the anaerobic tank located to the left of the aerobic tank. A chemical tank is arranged inside the right side of the outer shell. A filtration assembly is arranged inside the aerobic tank. Aeration assemblies are arranged in the regulating tank and the aerobic tank. A dosing assembly is arranged in the chemical tank. By integrating the regulating tank, first reaction tank, second reaction tank, sedimentation tank, anaerobic tank, aerobic tank, and filtration assembly within the outer shell, the equipment achieves a high degree of integration. The landfill leachate is treated by adding sodium hydroxide and a deodorizing agent to the regulating tank, adding PAC to the first reaction tank, and adding PAM to the second reaction tank. The landfill leachate is treated by anaerobic and aerobic bacteria, thus achieving the purpose of treating the landfill leachate.

Description

Technical Field

[0001] This invention relates to the field of waste treatment technology, specifically to a waste leachate treatment equipment. Background Technology

[0002] Urban waste transfer stations are typically built in various areas of the city to reduce investment and transportation costs. However, the waste compression process generates a large amount of filtrate, and the volume, composition, and concentration of this filtrate vary significantly depending on the waste composition, seasonal climate (including temperature, humidity, sunshine, rain, and snow), and it is characterized by high concentrations of organic pollutants, complex composition, and the potential for secondary pollution if directly discharged. Currently, wastewater from most urban waste compression stations across the country is discharged directly without treatment. During this discharge process, large amounts of foul odors overflow from various wastewater wells, impacting the surrounding environment.

[0003] In addition, when treating waste filtrate, sodium hydroxide needs to be added to adjust the pH, and a deodorizer needs to be added for deodorization. Then, PAC and PAM are added sequentially for flocculation. Afterward, the filtrate flows into anaerobic and aerobic tanks, where anaerobic and aerobic bacteria decompose the organic matter. Finally, filtration is required to ensure the filtrate meets discharge standards. However, this process requires multiple treatment tanks or other containers to store the filtrate, necessitating significant space, thus warranting further improvement. Summary of the Invention

[0004] Technical problems to be solved:

[0005] To address the shortcomings of existing technologies, this invention provides a landfill leachate treatment equipment that has the advantages of treating leachate and a high degree of integration of the treatment device, thus solving the problems of direct discharge of leachate affecting the surrounding environment and the large area occupied by the treatment pond.

[0006] Technical solution:

[0007] To achieve the aforementioned goal of treating leachate with a high degree of integration, this invention provides the following technical solution: A landfill leachate treatment equipment includes a shell. From back to front, a regulating tank, a first reaction tank, a second reaction tank, and a sedimentation tank are sequentially arranged on the left side of the shell. An anaerobic tank and an aerobic tank are arranged in the middle of the shell, with the anaerobic tank located to the left of the aerobic tank. A chemical tank is arranged inside the right side of the shell. The landfill leachate flows sequentially through the regulating tank, the first reaction tank, the second reaction tank, the sedimentation tank, the anaerobic tank, and the aerobic tank. A filtration assembly is installed in the aerobic tank. Aeration assemblies are installed in the regulating tank and the aerobic tank, and a dosing assembly is installed in the chemical tank.

[0008] Preferably, the equalization tank and reaction tank one are separated by a partition one, and reaction tank one and reaction tank two are separated by a partition two. The top of the outer shell, the top of partition one, and the top of partition two decrease sequentially. Slide rails are fixedly installed on the left and right inner walls of reaction tank two. The slide rails pass through partition two, and the rear end of the slide rails is fixedly installed on the surface of partition one. A guide rod is fixedly installed on the upper surface of the slide rails, and the guide rod is located inside reaction tank two. A float plate is slidably connected to the guide rod. Multiple drainage holes are opened through the surface of the float plate. A submersible sewage pump is fixedly installed at the bottom of the float plate. The top output end of the submersible sewage pump is connected to a connecting pipe one. The other end of the connecting pipe one is connected to the left side of the sedimentation tank, and the connecting pipe one is in communication with the sedimentation tank.

[0009] Preferably, the bottom of the two sets of slide rails are slidably connected to slide seats, and the partition plate 2 has a through slot, in which the slide seat is slidably connected; a threaded collar is fixedly installed in the middle left side of the slide seat, and a guide groove is opened on the left side of the outer shell, which is connected to reaction tank 1 and reaction tank 2, and the threaded collar is slidably connected in the threaded collar; a sealing cover is fixedly installed on the left side of the outer shell, and a threaded rod is arranged along its length inside the sealing cover, the threaded collar is threadedly connected to the threaded rod, and a motor is fixedly installed at one end of the threaded rod; a sludge discharge pipe 1 is fixedly installed on the lower left side of the outer shell, which is connected to reaction tank 1, and a valve is installed on the sludge discharge pipe 1; a sludge discharge pipe 2 is fixedly installed on the lower left side of the outer shell, which is connected to reaction tank 2, and a valve 2 is installed on the sludge discharge pipe 2; two sets of air inlet pipes are fixedly installed in the middle left side of the outer shell, which are respectively connected to reaction tank 1 and reaction tank 2, and the top of the air inlet pipe is flush with the top of partition plate 1.

[0010] Preferably, a filter inclined tube is embedded in the middle of the sedimentation tank, and multiple filter holes are opened through the top of the filter inclined tube. The filter holes are inclined and the cross-section of the filter holes is regular hexagonal. A groove is opened on the top right side of the sedimentation tank, and the sedimentation tank is connected to the anaerobic tank through the groove. A filter screen is inserted in the groove.

[0011] Preferably, a flow guide is provided on the top right side of the anaerobic tank, and the anaerobic tank is connected to the aerobic tank through the flow guide; a support plate is fixedly installed on the inner wall of the anaerobic tank, a grid frame is placed on the top of the support plate, and multiple support rods are fixedly installed through the grid frame, with plastic strips fixedly installed on the support rods.

[0012] Preferably, an installation frame 1 is placed inside the aerobic tank, and multiple support rods 2 are fixedly installed inside the installation frame 1. Plastic discs are arranged in an array along the length of the support rods 2, and plastic strips 2 are arranged in an array on the circumferential surface of the plastic discs.

[0013] Preferably, the filtration assembly includes a second mounting frame placed in the aerobic tank, a flow guide box fixedly installed on the top of the second mounting frame, a plurality of MBR membranes fixedly installed on the bottom of the flow guide box, the MBR membranes communicating with the flow guide box, and a suction pipe fixedly installed on the top of the flow guide box.

[0014] Preferably, the aeration assembly includes a blower, the output end of which is connected to a four-way pipe, and the other three ends of the four-way pipe are each connected to a connecting pipe II, the other end of which is connected to an aeration disc; one aeration disc on the left is placed in the equalization tank, and the two aeration discs on the right are placed in the aerobic tank, and the two aeration discs on the right are fixed in the mounting frame I.

[0015] Preferably, the dosing assembly includes four pump casings, each containing an impeller rotatably connected to its interior. A connecting shaft is fixedly installed at the center of the top of each impeller, passing through the center of the top of the pump casing. The impellers are connected to sprockets via the connecting shafts, and the four sprockets are connected by a chain belt. A second motor is connected to the center of the last sprocket. A dosing inlet pipe is connected to the input end of each pump casing, and a dosing outlet pipe is connected to the output end of each pump casing. The chemical tank is equally divided into four sections, from back to front: a sodium hydroxide tank, a deodorant tank, a PAC tank, and a PAM tank. The four dosing inlet pipes are respectively inserted into the sodium hydroxide tank, the deodorant tank, the PAC tank, and the PAM tank. The four dosing outlet pipes are sequentially inserted from front to back into the second reaction tank, the first reaction tank, the first half of the equalization tank, and the second half of the equalization tank.

[0016] Beneficial effects:

[0017] Compared with the prior art, the present invention provides a landfill leachate treatment equipment with the following beneficial effects:

[0018] 1. This landfill leachate treatment equipment is highly integrated, comprising an equalization tank, a reaction tank 1, a reaction tank 2, a sedimentation tank, an anaerobic tank, an aerobic tank, and a filtration assembly within its outer shell. The equipment treats the landfill leachate by adding sodium hydroxide and a deodorizer to the equalization tank, PAC to the reaction tank 1, and PAM to the reaction tank 2. After filtration, the leachate sequentially enters the anaerobic and aerobic tanks, where it is treated by anaerobic and aerobic bacteria to decompose the organic matter. Finally, the leachate is filtered through the filtration assembly, achieving the purpose of treating the landfill leachate.

[0019] 2. This landfill leachate treatment equipment uses a motor to drive a threaded rod to rotate, which in turn drives a threaded collar and a slide block to slide along a slide rail until the slide block is in contact with the inner front wall of the reaction tank. The slide block divides the reaction tank into upper and lower parts. By adjusting valve 2, large flocs in the lower part of the reaction tank are discharged from the sludge discharge pipe 2, thereby facilitating the discharge of flocs generated during the landfill leachate treatment process. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a landfill leachate treatment equipment proposed in this invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the internal structure of the outer shell of a landfill leachate treatment equipment proposed in this invention.

[0022] Figure 3 This is a top view schematic diagram of a landfill leachate treatment equipment proposed in this invention;

[0023] Figure 4 This is a three-dimensional cross-sectional view of the left end of the outer shell of a landfill leachate treatment equipment proposed in this invention.

[0024] Figure 5 This is a schematic diagram of the three-dimensional assembly structure of the slide rail and slide block of a landfill leachate treatment equipment proposed in this invention.

[0025] Figure 6 This is a three-dimensional structural diagram of the internal structure of the reaction tank 2 of the landfill leachate treatment equipment proposed in this invention.

[0026] Figure 7 This is a three-dimensional cross-sectional view of the outer shell of a landfill leachate treatment equipment proposed in this invention;

[0027] Figure 8 This invention proposes a landfill leachate treatment equipment. Figure 7 Enlarged structural diagram of section A in the middle;

[0028] Figure 9 This is a schematic diagram of the internal three-dimensional structure of the anaerobic tank of a landfill leachate treatment equipment proposed in this invention.

[0029] Figure 10 This is a schematic diagram of the internal three-dimensional structure of the aerobic tank of a landfill leachate treatment equipment proposed in this invention.

[0030] Figure 11 This is a three-dimensional structural diagram of the filter component of a landfill leachate treatment equipment proposed in this invention;

[0031] Figure 12 This is a three-dimensional structural diagram of the aeration component of a landfill leachate treatment equipment proposed in this invention.

[0032] Figure 13 This is a three-dimensional structural diagram of the dosing component of a landfill leachate treatment equipment proposed in this invention;

[0033] Figure 14This is a schematic diagram of the three-dimensional assembly structure of the pump casing and impeller of a landfill leachate treatment equipment proposed in this invention.

[0034] In the diagram: 100, outer shell; 200, equalization tank; 300, reaction tank one; 400, reaction tank two; 500, sedimentation tank; 600, anaerobic tank; 700, aerobic tank; 800, filter assembly; 900, chemical tank; 1000, aeration assembly; 1100, dosing assembly;

[0035] 401. Partition 1; 402. Partition 2; 403. Slide rail; 404. Guide rod; 405. Float; 406. Submersible pump; 407. Connecting pipe 1; 408. Slide block; 409. Slot; 410. Threaded collar; 411. Guide groove; 412. Sealing cover; 413. Threaded rod; 414. Motor 1; 415. Sludge discharge pipe 1; 416. Valve 1; 417. Sludge discharge pipe 2; 418. Valve 2; 419. Air inlet pipe;

[0036] Filter inclined tube; 502, groove; 503, filter screen;

[0037] 602. Drainage outlet; 603. Pallet; 604. Grid frame; 605. Support rod 1; 606. Plastic strip 1;

[0038] Mounting bracket 1; 702, support rod 2; 703, plastic tray; 704, plastic strip 2;

[0039] Mounting bracket 2; 802, flow guide box; 803, MBR membrane; 804, suction tube;

[0040] Blower; 1002, four-way pipe; 1003, connecting pipe two; 1004, aeration disc;

[0041] 1102. Pump casing; 1103. Impeller; 1104. Sprocket; 1105. Chain belt; 1106. Motor II; 1107. Inlet pipe; 1108. Outlet pipe. Detailed Implementation

[0042] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Please see Figures 1-3 A landfill leachate treatment device includes an outer shell 100. From back to front, an equalization tank 200, a first reaction tank 300, a second reaction tank 400, and a sedimentation tank 500 are sequentially arranged on the left side of the outer shell 100. An anaerobic tank 600 and an aerobic tank 700 are arranged in the middle of the outer shell 100, with the anaerobic tank 600 located to the left of the aerobic tank 700. A chemical tank 900 is arranged inside the right end of the outer shell 100. The landfill leachate flows sequentially through the equalization tank 200, the first reaction tank 300, the second reaction tank 400, the sedimentation tank 500, the anaerobic tank 600, and the aerobic tank 700. A filter assembly 800 is installed inside the aerobic tank 700. An aeration assembly 1000 is installed inside the equalization tank 200 and the aerobic tank 700.

[0045] The chemical tank 900 is equipped with a dosing assembly 1100. The chemical tank 900 is equally divided into four sections, from back to front: sodium hydroxide chamber, deodorant chamber, PAC chamber, and PAM chamber. Sodium hydroxide is added to the equalization tank 200 through the chemical tank 900 to adjust the pH of the landfill leachate. The pH of the raw water is 4-5, while the pH required by the flocculant is 5.6-8. The deodorant is added to the equalization tank 200 through the chemical tank 900 to deodorize the landfill leachate. Then, PAC and PAM are added to reaction tank 300 and reaction tank 400 respectively through the chemical tank 900. In reaction tank 300, PAC combines with colloidal suspended particles or emulsion pollutants that are difficult to settle in the water to form small flocs. Then, when the landfill leachate flows into reaction tank 400, PAM causes the small flocs to aggregate into larger flocs.

[0046] Please see Figure 4 The equalization tank 200 and the first reaction tank 300 are separated by a partition 301, and the first reaction tank 300 and the second reaction tank 400 are separated by a partition 401. The top of the outer shell 100, the top of the first partition 301, and the top of the second partition 401 decrease sequentially. When the liquid level of the landfill leachate inside the equalization tank 200 exceeds the top of the first partition 301, the landfill leachate flows into the first reaction tank 300; when the liquid level of the landfill leachate inside the first reaction tank 300 exceeds the top of the second partition 401, the landfill leachate flows into the second reaction tank 400.

[0047] Slide rails 402 are fixedly installed on the left and right inner walls of reaction tank 2 400. Slide rails 402 penetrate partition 2 401, and the rear end of slide rails 402 is fixedly installed on the surface of partition 1 301. Guide rods 403 are fixedly installed on the upper surface of slide rails 402 and are located inside reaction tank 2 400. A float plate 404 is slidably connected to the guide rod 403. Multiple drainage holes are opened through the surface of the float plate 404. A submersible sewage pump 405 is fixedly installed at the bottom of the float plate 404. The top output end of the submersible sewage pump 405 is connected to a connecting pipe 406. The other end of the connecting pipe 406 is connected to the left side of sedimentation tank 500, and the connecting pipe 406 is connected to sedimentation tank 500. The float plate 404 floats on the liquid surface inside the reaction tank 2 400, so that the submersible pump 405 is in the supernatant inside the reaction tank 2 400. The submersible pump 405 and the connecting pipe 406 work together to transport the supernatant inside the reaction tank 2 400 to the lower half of the sedimentation tank 500.

[0048] Two sets of slide rails 402 are slidably connected to slide blocks 407 at their bottoms. A slot 408 is provided through the partition plate 401, and the slide block 407 is slidably connected within the slot 408. The upper surface of the slide block 407 has an isosceles trapezoidal cross-section mounting groove. The lower half of the slide rail 402's cross-section matches the cross-section of the mounting groove, and the lower half of the slide rail 402 is located within the slot 408. When the slide block 407 slides along the slide rail 402 and adheres to the inner front wall of the reaction tank 400, the slide block 407 divides the reaction tank 400 into upper and lower parts. When the slide block 407 slides to adhere to the inner rear wall of the reaction tank 300, the slide block 407 divides the reaction tank 300 into upper and lower parts.

[0049] A threaded collar 409 is fixedly installed on the middle left side of the slide block 407. A guide groove 410 is provided on the left side of the outer casing 100, which communicates with reaction tank 300 and reaction tank 400. The threaded collar 409 is slidably connected inside the slide block 407. A sealing cover 411 is fixedly installed on the left side of the outer casing 100, which seals the opening of the guide groove 410. A threaded rod 412 is provided along the length of the sealing cover 411. The threaded collar 409 is threadedly connected to the threaded rod 412. A motor 413 is fixedly installed at one end of the threaded rod 412. The motor 413 drives the threaded rod 412 to rotate, causing the threaded collar 409 and the slide block 407 to slide along the slide rail 402.

[0050] A sludge discharge pipe 414 is fixedly installed on the lower left side of the outer casing 100. The sludge discharge pipe 414 is connected to the reaction tank 300, and a valve 415 is installed on the sludge discharge pipe 414. When the slide 407 divides the reaction tank 300 into upper and lower parts, the flocculent material in the lower half of the reaction tank 300 is discharged through the sludge discharge pipe 414 by adjusting the valve 415. A second sludge discharge pipe 416 is fixedly installed on the lower left side of the outer casing 100. The second sludge discharge pipe 416 is connected to the reaction tank 400, and a valve 417 is installed on the sludge discharge pipe 417. When the slide 407 divides the reaction tank 400 into upper and lower parts, the flocculent material in the lower half of the reaction tank 400 is discharged through the sludge discharge pipe 416 by adjusting the valve 417.

[0051] In actual operation, valve 415 keeps the sludge discharge pipe 414 sealed for an extended period, allowing small flocs inside reaction tank 300 to flow into reaction tank 400. Under the action of PAM, these small flocs form larger flocs, which are then discharged through sludge discharge pipe 416. When there are too many small flocs inside reaction tank 300, the sliding seat 407 divides reaction tank 300 into upper and lower sections, and then some of the small flocs at the bottom of reaction tank 300 are discharged through sludge discharge pipe 414.

[0052] Two sets of air inlet pipes 418 are fixedly installed on the middle left side of the outer casing 100. The two sets of air inlet pipes 418 are connected to the first reaction tank 300 and the second reaction tank 400 respectively. The top of the air inlet pipes 418 is flush with the top of the partition 301. The air inlet pipes 418 allow outside air to enter the lower half of the first reaction tank 300 or the lower half of the second reaction tank 400, ensuring stable discharge of flocculants from the lower half of the first reaction tank 300 or the lower half of the second reaction tank 400.

[0053] Please see Figures 7-8 A filter inclined tube 501 is embedded in the middle of the sedimentation tank 500. Multiple filter holes are opened through the top of the filter inclined tube 501, and the filter holes are inclined with a regular hexagonal cross-section. A groove 502 is opened on the top right side of the sedimentation tank 500, connecting the sedimentation tank 500 to the anaerobic tank 600. A filter screen 503 is inserted into the groove 502. The filtration of the landfill leachate by the filter inclined tube 501 and the filter screen 503 prevents large flocs in the landfill leachate from entering the anaerobic tank 600.

[0054] Please see Figure 7 and Figure 9An inlet 601 is provided on the top right side of the anaerobic tank 600, through which the anaerobic tank 600 connects to the aerobic tank 700. A support plate 602 is fixedly installed on the inner wall of the anaerobic tank 600, and a grid frame 603 is placed on top of the support plate 602. Multiple support rods 604 are fixedly connected through the grid frame 603, and plastic strips 605 are fixedly installed on the support rods 604. The plastic strips 605 are used to attach anaerobic bacteria. Within the anaerobic tank 600, the anaerobic bacteria release extracellular enzymes, causing organic matter to undergo four stages: hydrolysis, acidification, acetic acid production, and methanation. This process decomposes high-molecular-weight organic matter in the wastewater into smaller molecules, thus removing organic matter from the wastewater.

[0055] During the hydrolysis stage, high-molecular-weight organic compounds cannot be directly utilized by bacteria due to their large relative molecular weight. At this stage, they are broken down into smaller molecules by bacterial extracellular enzymes. For example, cellulose is hydrolyzed into cellobiose and glucose, and starch is broken down into maltose and glucose.

[0056] During the acidification stage, dissolved organic matter is converted into end products, primarily volatile fatty acids. In this stage, the aforementioned small-molecule compounds are transformed into simpler compounds within the acidifying bacteria's cells and secreted extracellularly. The main products of this stage include volatile fatty acids, alcohols, lactic acid, carbon dioxide, hydrogen, ammonia, and hydrogen sulfide.

[0057] During the acetic acid production stage, under the action of hydrogen-producing acetic acid bacteria, the products of the previous stage are further converted into acetic acid, hydrogen, carbonic acid, and new cellular material.

[0058] During the methanation stage, acetic acid, hydrogen, carbonic acid, formic acid, and methanol are converted into methane, carbon dioxide, and new cellular material. The process by which methanogenic bacteria convert acetic acid, acetate, and hydrogen into methane is accomplished by two physiologically distinct groups of methanogens: one group converts hydrogen and carbon dioxide into methane, while the other group decarboxylates acetic acid or acetate to produce methane.

[0059] Please see Figure 10 Inside the aerobic tank 700, there is an installation frame 701. Multiple support rods 702 are fixedly installed inside the installation frame 701. Plastic discs 703 are arranged in an array along the length of each support rod 702. Plastic strips 704 are arranged in an array on the circumference of each plastic disc 703. The plastic strips 704 are used to attach aerobic bacteria, which decompose organic matter in the wastewater into inorganic salts.

[0060] Please see Figure 11The filter assembly 800 includes a mounting frame 801 placed within the aerobic tank 700. A flow guide box 802 is fixedly mounted on the top of the mounting frame 801, and multiple MBR membranes 803 are fixedly mounted on the bottom of the flow guide box 802. The MBR membranes 803 are connected to the flow guide box 802, and a suction pipe 804 is fixedly mounted on the top of the flow guide box 802. The other end of the suction pipe 804 is connected to a suction pump. The MBR membrane 803 filtration effectively retains activated sludge and large organic molecules in the system, achieving deep purification of wastewater while retaining microorganisms with long generation cycles.

[0061] Please see Figure 12 The aeration assembly 1000 includes a blower 1001. The output end of the blower 1001 is connected to a four-way pipe 1002. The other three ends of the four-way pipe 1002 are each connected to a connecting pipe 1003. The other end of each connecting pipe 1003 is connected to an aeration disc 1004. One aeration disc 1004 on the left is placed in the equalization tank 200, and two aeration discs 1004 on the right are placed in the aerobic tank 700, with the two right aeration discs 1004 fixed within the mounting frame 701. Air is introduced into the equalization tank 200 through the left aeration disc 1004 for pre-aeration treatment, preventing the sedimentation and caking of suspended solids in the wastewater, which would reduce the effective water storage capacity of the equalization tank 200, and reducing the odor of the wastewater under anaerobic conditions in the equalization tank 200. It also serves to remove ammonia nitrogen. Air is introduced into the mounting frame 701 through the two sets of aeration discs 1004 on the right, providing sufficient oxygen for the survival of aerobic bacteria.

[0062] Please see Figures 13-14 The dosing assembly 1100 includes four pump housings 1101. Impellers 1102 are rotatably connected within each pump housing 1101. A connecting shaft is fixedly installed at the center of the top of each impeller 1102, passing through the center of the top of each pump housing 1101. Sprockets 1103 are connected to each impeller 1102 via the connecting shaft. The four sprockets 1103 are connected by a chain belt 1104. A second motor 1105 is connected to the center of the last sprocket 1103. The second motor 1105 drives the last sprocket 1103 to rotate, which, in conjunction with the transmission action of the chain belt 1104, drives the other three sprockets 1103 to rotate, thereby driving the four impellers 1102 to rotate. A drug inlet pipe 1106 is connected to the input end of each pump housing 1101, and a drug outlet pipe 1107 is connected to the output end of each pump housing 1101. Four sets of inlet pipes 1106 are respectively inserted into the sodium hydroxide chamber, deodorant chamber, PAC chamber, and PAM chamber; four sets of outlet pipes 1107 are sequentially inserted from front to back into reaction tank 2 400, reaction tank 1 300, the front half of equalization tank 200, and the rear half of equalization tank 200. This delivers sodium hydroxide and deodorant to equalization tank 200, PAC to reaction tank 1 300, and PAM to reaction tank 2 400.

[0063] In operation, the leachate is first added to the equalization tank 200. When the liquid level of the leachate in the equalization tank 200 exceeds the baffle 301, the leachate flows into the reaction tank 300. When the liquid level in the reaction tank 300 exceeds the baffle 401, the leachate flows into the reaction tank 400. The leachate floats on the liquid surface in the reaction tank 400 via the float plate 404. The submersible pump 405, in conjunction with the connecting pipe 406, pumps the supernatant of the leachate into the sedimentation tank 500. Then, the leachate in the sedimentation tank 500 passes through the filter screen 503 and enters the anaerobic tank 600. After that, the leachate passes through the guide port 601 and enters the aerobic tank 700.

[0064] The motor 1105 drives the sprocket 1103 at the rear to rotate, which, in conjunction with the transmission action of the chain belt 1104, drives the four sets of impellers 1102 to rotate. This allows the four sets of inlet pipes 1106 to draw sodium hydroxide, deodorant, PAC, and PAM from the chemical tank 900, respectively. The sodium hydroxide and deodorant are then transported to the equalization tank 200 through the four sets of outlet pipes 1107, while PAC is transported to the first reaction tank 300 and PAM is transported to the second reaction tank 400.

[0065] At the same time, air is supplied to the four-way pipe 1002 by the blower 1001, and with the connection of the connecting pipe 2 1003, air is introduced into the regulating tank 200 by a set of aeration discs 1004 on the left side, and air is introduced into the mounting frame 1 701 by two sets of aeration discs 1004 on the right side.

[0066] Inside the equalization tank 200, the pH of the landfill leachate is adjusted by sodium hydroxide, and the leachate is deodorized by a deodorizing agent. Then, under the action of PAC, the colloidal suspended particles or milky pollutants in the landfill leachate that are difficult to settle combine to form small flocs. Then, under the action of PAM, the small flocs aggregate into large flocs.

[0067] The threaded rod 412 is driven to rotate by the motor 413, which drives the threaded collar 409 and the slide 407 to slide along the slide rail 402 until the slide 407 is attached to the inner front wall of the reaction tank 400. The slide 407 divides the reaction tank 400 into upper and lower parts. The valve 417 is adjusted so that the large flocs in the lower part of the reaction tank 400 are discharged from the mud discharge pipe 416.

[0068] After the landfill leachate enters the anaerobic tank 600, the organic matter undergoes four stages of hydrolysis, acidification, acetic acid production, and methanation under the action of anaerobic bacteria. After the landfill leachate enters the aerobic tank 700, the organic matter in the wastewater is decomposed into inorganic salts under the action of aerobic bacteria.

[0069] Finally, the MBR membrane 803 is suctioned through the suction pipe 804 and the flow guide box 802, and the MBR membrane 803 filters the landfill leachate to obtain landfill leachate that meets the discharge standards.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A landfill leachate treatment device, comprising a housing (100), characterized in that: The outer shell (100) is provided with an equalization tank (200), a reaction tank one (300), a reaction tank two (400) and a sedimentation tank (500) in sequence from back to front on the left end. The outer shell (100) is provided with an anaerobic tank (600) and an aerobic tank (700) in the middle. The anaerobic tank (600) is located to the left of the aerobic tank (700). The outer shell (100) is provided with a reagent tank (900) inside the right end. Landfill leachate flows sequentially through equalization tank (200), reaction tank one (300), reaction tank two (400), sedimentation tank (500), anaerobic tank (600), and aerobic tank (700), wherein a filter assembly (800) is installed in the aerobic tank (700). The equalization tank (200) and the aerobic tank (700) are equipped with aeration components (1000), and the chemical tank (900) is equipped with a dosing component (1100). The regulating tank (200) and the first reaction tank (300) are separated by a partition plate (301), and the first reaction tank (300) and the second reaction tank (400) are separated by a partition plate (401). The top of the outer shell (100), the top of the first partition plate (301) and the top of the second partition plate (401) are lowered in sequence. The inner walls of the left and right sides of the reaction tank 2 (400) are both fixedly equipped with slide rails (402). The slide rails (402) penetrate the partition 2 (401), and the rear end of the slide rails (402) is fixedly installed on the surface of the partition 1 (301). A guide rod (403) is fixedly installed on the upper surface of the slide rails (402), and the guide rod (403) is located inside the reaction tank 2 (400). A float plate (404) is slidably connected to the guide rod (403). Multiple water leakage holes are opened through the surface of the float plate (404). A submersible sewage pump (405) is fixedly installed at the bottom of the float plate (404). A connecting pipe (406) is connected to the top output end of the submersible sewage pump (405). The other end of the connecting pipe (406) is connected to the left side of the sedimentation tank (500), and the connecting pipe (406) is connected to the sedimentation tank (500). The bottom of the two sets of slide rails (402) is slidably connected to slide blocks (407), and the partition plate (401) is provided with a slot (408) through it, and the slide block (407) is slidably connected in the slot (408); A threaded collar (409) is fixedly installed on the middle left side of the slide block (407), and a guide groove (410) is provided on the left side of the outer shell (100). The guide groove (410) is connected to the first reaction tank (300) and the second reaction tank (400). The threaded collar (409) is slidably connected inside the threaded collar (409). A sealing cover (411) is fixedly installed on the left side of the outer shell (100). A threaded rod (412) is provided inside the sealing cover (411) along its length direction. The threaded collar (409) is threadedly connected to the threaded rod (412). A motor (413) is fixedly installed at one end of the threaded rod (412). A sludge discharge pipe (414) is fixedly installed on the lower left side of the outer shell (100). The sludge discharge pipe (414) is connected to the reaction tank (300). A valve (415) is installed on the sludge discharge pipe (414). A second sludge discharge pipe (416) is fixedly installed on the lower left side of the outer shell (100). The second sludge discharge pipe (416) is connected to the second reaction tank (400). A second valve (417) is provided on the second sludge discharge pipe (416). Two sets of air inlet pipes (418) are fixedly installed on the middle left side of the outer shell (100). The two sets of air inlet pipes (418) are respectively connected to the first reaction tank (300) and the second reaction tank (400). The top of the air inlet pipe (418) is flush with the top of the partition plate (301).

2. The landfill leachate treatment equipment according to claim 1, characterized in that: The sedimentation tank (500) is equipped with a filter inclined tube (501) in the middle. The top of the filter inclined tube (501) is provided with multiple filter holes. The filter holes are inclined and the cross-section of the filter holes is a regular hexagon. The sedimentation tank (500) has a groove (502) on the top right side. The sedimentation tank (500) is connected to the anaerobic tank (600) through the groove (502). A filter screen (503) is inserted into the groove (502).

3. The landfill leachate treatment equipment according to claim 1, characterized in that: A flow guide (601) is provided on the top right side of the anaerobic tank (600), and the anaerobic tank (600) is connected to the aerobic tank (700) through the flow guide (601); The anaerobic tank (600) has a tray (602) fixedly installed on its inner wall. A grid frame (603) is placed on the top of the tray (602). Multiple support rods (604) are fixedly installed through the grid frame (603). A plastic strip (605) is fixedly installed on the support rods (604).

4. The landfill leachate treatment equipment according to claim 1, characterized in that: The aerobic tank (700) has an installation frame (701) inside, and multiple support rods (702) are fixedly installed inside the installation frame (701). Plastic discs (703) are arranged in an array along the length of the support rods (702), and plastic strips (704) are arranged in an array on the circumferential surface of the plastic discs (703).

5. The landfill leachate treatment equipment according to claim 1, characterized in that: The filtration assembly (800) includes a second mounting frame (801) placed in an aerobic tank (700). A flow guide box (802) is fixedly installed on the top of the second mounting frame (801). Multiple MBR membranes (803) are fixedly installed on the bottom of the flow guide box (802). The MBR membranes (803) are connected to the flow guide box (802). A suction pipe (804) is fixedly installed on the top of the flow guide box (802).

6. The landfill leachate treatment equipment according to claim 1, characterized in that: The aeration assembly (1000) includes a blower (1001), the output end of which is connected to a four-way pipe (1002), and the other three ends of the four-way pipe (1002) are each connected to a connecting pipe two (1003), and the other end of the connecting pipe two (1003) is connected to an aeration disc (1004). One of the aeration discs (1004) on the left is placed in the equalization tank (200), and the two aeration discs (1004) on the right are placed in the aerobic tank (700), and the two aeration discs (1004) on the right are fixed in the mounting frame (701).

7. The landfill leachate treatment equipment according to claim 1, characterized in that: The dosing assembly (1100) includes four sets of pump housings (1101). An impeller (1102) is rotatably connected inside the pump housing (1101). A connecting shaft is fixedly installed at the top center of the impeller (1102). The connecting shaft passes through the top center of the pump housing (1101). The impeller (1102) is connected to a sprocket (1103) through the connecting shaft. The four sets of sprockets (1103) are connected by a chain belt (1104). A motor (1105) is connected at the center of the last sprocket (1103). The pump housing (1101) has an input end connected to a drug inlet pipe (1106) and an output end connected to a drug outlet pipe (1107). The reagent pool (900) is equally divided into four parts, which are, from back to front, sodium hydroxide tank, deodorant tank, PAC tank and PAM tank. The four sets of inlet pipes (1106) are respectively inserted into the sodium hydroxide tank, deodorant tank, PAC tank and PAM tank. The four sets of drug outlet tubes (1107) are inserted from front to back into the front half of reaction tank 2 (400), reaction tank 1 (300), regulating tank (200), and regulating tank (200) and the rear half of regulating tank (200).

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