Integrated leachate biological treatment device

Abstract

The utility model discloses an integrated leachate biological treatment device which comprises a box body, the box body is divided into a hydrolysis acidification pool and an MBR membrane pool through a vertical partition plate, a biological filler layer is arranged in the middle of the hydrolysis acidification pool, an MBR membrane assembly is arranged in the middle of the MBR membrane pool, and a first aerator and a second aerator are arranged at the bottoms of the hydrolysis acidification pool and the MBR membrane pool respectively. A water inlet is formed in the front side of the hydrolysis acidification pool, a water passing opening is formed in the bottom of the vertical partition plate, and a water outlet of the MBR membrane assembly is connected with a water outlet pipeline. The integrated leachate biological treatment device disclosed by the utility model has the advantages of small occupied area, compact structure, convenience in installation, cost saving, good treatment effect and the like.

Description

Technical Field

[0001] This utility model relates to the field of waste treatment technology, and in particular to an integrated leachate biological treatment device. Background Technology

[0002] Landfill leachate is a type of organic pollutant wastewater with complex water composition, high pollutant concentration, large fluctuations in water volume and quality, and is difficult to treat. Its main source is the sanitary landfill and incineration process of municipal solid waste.

[0003] Current technologies for treating landfill leachate generally involve multiple stages, including pretreatment, biological treatment, and physicochemical treatment, to meet increasingly stringent discharge requirements. Hydrolysis acidification tanks and MBR membrane tanks are commonly used equipment in the biological treatment stage of landfill leachate. They are usually installed independently, occupy a large area, have numerous supporting pipelines, are relatively complex to install, and have high equipment costs. Utility Model Content

[0004] The purpose of this invention is to provide an integrated biological leachate treatment device to solve the problems existing in the prior art.

[0005] The purpose of this utility model is achieved as follows: An integrated leachate biological treatment device includes a box body, which is divided into a hydrolysis acidification tank and an MBR membrane tank by a vertical partition. A biological packing layer is provided in the middle of the hydrolysis acidification tank, and an MBR membrane module is provided in the middle of the MBR membrane tank. A first aerator and a second aerator are respectively provided at the bottom of the hydrolysis acidification tank and the MBR membrane tank. An inlet is provided at the front of the hydrolysis acidification tank, and an outlet is provided at the bottom of the vertical partition. The outlet of the MBR membrane module is connected to an outlet pipe.

[0006] This utility model discloses an integrated leachate biological treatment device. By integrating the hydrolysis acidification tank and the MBR membrane tank into a single design, the footprint is reduced. The hydrolysis acidification tank uses a top-inlet and bottom-outlet design, allowing the two tanks to be connected only via an inlet, eliminating the need for connecting pipes, saving costs, and simplifying installation. Furthermore, by installing a first aerator at the bottom of the hydrolysis acidification tank instead of a stirrer, uniform mixing within the tank is ensured. Adjusting the control valves allows for precise control of the dissolved oxygen concentration to meet the hydrolysis acidification requirements, improving the reaction efficiency. In summary, this utility model's integrated leachate biological treatment device has advantages such as small footprint, compact structure, convenient installation, cost savings, and good treatment effect.

[0007] As a further improvement of this utility model, a buffer tank is provided on the effluent pipeline. The buffer tank is connected to an alkaline washing pipeline and an acid washing pipeline. The alkaline washing pipeline is connected to a sodium hypochlorite dosing tank via a suction pump. The sodium hypochlorite dosing tank is equipped with a stirring device. The acid washing pipeline is connected to a hydrochloric acid addition point. Control valves are provided on the alkaline washing pipeline, acid washing pipeline, and effluent pipeline. Through the alkaline washing and acid washing pipelines, a staged cleaning process for the MBR membrane module can be achieved. The alkaline washing stage decomposes organic pollutants on the membrane surface through strong oxidation and kills microorganisms inside and outside the membrane pores, preventing biofouling. The acid washing stage dissolves inorganic scale (such as calcium carbonate, metal oxides, and silicates) on the membrane surface. Furthermore, while meeting the discharge requirements of treated purified water, the effluent pipeline can also clean the buffer tank and related pipelines after alkaline or acid washing, ensuring that the chemicals in each stage act independently, preventing cross-contamination, and avoiding residual chemicals affecting subsequent processes.

[0008] As a further improvement of this utility model, the air inlets of the first aerator, the second aerator, and the MBR membrane tank are respectively connected to the Roots blower via air inlet pipes. Control valves are installed on the air inlet pipes; by adjusting these valves, the required dissolved oxygen concentration in the hydrolysis acidification tank and the MBR membrane tank can be accurately controlled, ensuring the reaction effect.

[0009] As a further improvement of this utility model, both the suction pump and the Roots blower include two units connected in parallel, thereby improving the reliability and stability of the system.

[0010] As a further improvement of this utility model, a horizontal water distribution pipe is placed on the hydrolysis acidification tank, and the water distribution pipe is connected to the water inlet, so as to achieve uniform water distribution and improve the reaction effect.

[0011] As a further improvement of this utility model, a sludge pump is provided at the rear bottom of the MBR membrane tank. The sludge pump is connected to a sludge discharge pipeline located outside the tank via a plastic hose. The sludge discharge pipeline is connected to the sludge tank for convenient subsequent treatment.

[0012] As a further improvement of this utility model, a biological packing base is provided on the lower side of the hydrolysis acidification tank, and a biological packing layer is disposed on the biological packing base. The biological packing base provides a carrier for microorganisms to attach and grow, which helps the cultivation and reproduction of microorganisms; it also has the function of cutting and blocking air bubbles, which can increase the dissolved oxygen concentration in wastewater, thereby promoting microbial metabolism, accelerating the decomposition of organic pollutants, and improving wastewater treatment efficiency.

[0013] As a further improvement of this utility model, the inlet is connected to an inclined tube sedimentation tank, and the outlet pipe is connected to an activated carbon filter. The flocculated wastewater is settled in the inclined tube sedimentation tank to improve the biological treatment effect. Then, the purified water after biological treatment is further filtered through the activated carbon filter to remove residual organic matter and trace pollutants, thereby improving the effect of the subsequent RO reaction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the integrated leachate biological treatment device of this utility model.

[0015] The components include: 1. Tank; 2. Hydrolysis acidification tank; 3. MBR membrane tank; 4. Biological packing layer; 5. MBR membrane module; 6. First aerator; 7. Second aerator; 8. Water distribution pipe; 9. Water outlet; 10. Water outlet pipe; 11. Roots blower; 12. Buffer tank; 13. Suction pump; 14. Sodium hypochlorite dosing tank; 15. Biological packing base; 16. Activated carbon filter; and 17. Sludge pump. Detailed Implementation

[0016] like Figure 1 The integrated leachate biological treatment device shown includes a housing 1, which is divided into a hydrolysis acidification tank 2 and an MBR membrane tank 3 by vertical partitions. A biological packing base 15 is provided on the lower side of the hydrolysis acidification tank 2, and a biological packing layer 4 is disposed on the biological packing base 15. The biological packing base 15 provides a carrier for microorganisms to attach and grow, which is conducive to the cultivation and reproduction of microorganisms; it also has the function of cutting and blocking air bubbles, which can increase the dissolved oxygen concentration in the wastewater, thereby promoting microbial metabolism, accelerating the decomposition of organic pollutants, and improving wastewater treatment efficiency.

[0017] The hydrolysis acidification tank 2 has a biological packing layer 4 in the middle, and the MBR membrane tank 3 has an MBR membrane module 5 in the middle. The bottom of the hydrolysis acidification tank 2 and the MBR membrane tank 3 are respectively equipped with a first aerator 6 and a second aerator 7. The air inlets of the first aerator 6, the second aerator 7, and the MBR membrane tank 3 are connected to the Roots blower 11 via air inlet pipes. Control valves are installed on the air inlet pipes; by adjusting these valves, the required dissolved oxygen concentration in the hydrolysis acidification tank 2 and the MBR membrane tank 3 can be accurately controlled to ensure the reaction effect.

[0018] The hydrolysis acidification tank 2 has an inlet at its front, which connects to an inclined tube sedimentation tank. Wastewater treated by flocculation is settled in the inclined tube sedimentation tank before entering the hydrolysis acidification tank 2 for further treatment, thus improving the biological treatment effect. A horizontal water distribution pipe 8 is placed on top of the hydrolysis acidification tank 2, connected to the inlet, thereby achieving uniform water distribution and improving the reaction effect within the hydrolysis acidification tank 2. A water outlet 9 is located at the bottom of the vertical baffle.

[0019] The outlet of the MBR membrane module 5 is connected to an outlet pipe 10. Outlet pipe 10 is connected to an activated carbon filter 16, which further filters the biologically treated water, removing residual organic matter and trace pollutants, thus improving the subsequent RO reaction efficiency. A buffer tank 12 is installed on outlet pipe 10, which is also connected to alkaline washing and acid washing pipes. The alkaline washing pipe is connected to a sodium hypochlorite dosing tank 14 via a suction pump 13. The sodium hypochlorite dosing tank 14 is equipped with a stirring device. The acid washing pipe is connected to a hydrochloric acid dosing point. Control valves are installed on the alkaline washing pipe, acid washing pipe, and outlet pipe 10. The alkaline washing and acid washing pipes enable a staged cleaning process for the MBR membrane module 5. The alkaline washing stage uses strong oxidizing agents to decompose organic pollutants on the membrane surface and kills microorganisms inside and outside the membrane pores, preventing biofouling. The acid washing stage dissolves inorganic scale (such as calcium carbonate, metal oxides, and silicates) on the membrane surface. In addition, the outlet pipe 10 can not only meet the discharge requirements of the treated purified water, but also clean the buffer tank 12 and related pipes after alkaline washing or acid washing, ensuring that the agents at each stage act independently, preventing cross-contamination, and avoiding residual agents from affecting subsequent processes.

[0020] A sludge pump 17 is installed at the bottom rear side of the MBR membrane tank 3. The sludge pump 17 is connected to the sludge discharge pipeline located outside the tank 1 through a plastic hose. The sludge discharge pipeline is connected to the sludge tank for convenient subsequent treatment.

[0021] In this embodiment, both the suction pump 13 and the Roots blower 11 include two units connected in parallel, which improves the reliability and stability of the system.

[0022] The integrated leachate biological treatment device in this embodiment reduces the footprint by integrating the hydrolysis acidification tank 2 and the MBR membrane tank 3 into one unit. Furthermore, the hydrolysis acidification tank 2 adopts an upper inlet and lower outlet design, allowing the two tanks to be connected only through the inlet 9, eliminating the need for connecting pipes, saving costs, and simplifying installation. Simultaneously, by installing a first aerator 6 at the bottom of the hydrolysis acidification tank 2 instead of a stirrer, uniform mixing within the tank is ensured. Moreover, by adjusting the control valves, the dissolved oxygen concentration within the tank can be precisely guaranteed to meet the hydrolysis acidification requirements, improving the reaction efficiency.

[0023] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. An integrated leachate biological treatment device, comprising a housing, characterized in that: The tank is divided into a hydrolysis acidification tank and an MBR membrane tank by a vertical partition. The hydrolysis acidification tank has a biological packing layer in the middle, and the MBR membrane tank has an MBR membrane module in the middle. The bottom of the hydrolysis acidification tank and the MBR membrane tank are respectively equipped with a first aerator and a second aerator. The hydrolysis acidification tank has an inlet on the front side, and the bottom of the vertical partition has a water outlet. The outlet of the MBR membrane module is connected to an outlet pipe.

2. The integrated leachate biological treatment device according to claim 1, characterized in that: The outlet pipe is equipped with a buffer tank, which is connected to an alkaline washing pipe and an acid washing pipe. The alkaline washing pipe is connected to a sodium hypochlorite dosing tank via a suction pump. The sodium hypochlorite dosing tank is equipped with a stirring device. The acid washing pipe is connected to a hydrochloric acid addition point. Control valves are provided on the alkaline washing pipe, the acid washing pipe, and the outlet pipe.

3. The integrated leachate biological treatment device according to claim 2, characterized in that: The first aerator, the second aerator, and the air inlet of the MBR membrane tank are respectively connected to the Roots blower through air inlet pipes.

4. The integrated leachate biological treatment device according to claim 3, characterized in that: The suction pump and the Roots blower both consist of two units connected in parallel.

5. The integrated leachate biological treatment device according to claim 1, characterized in that: A horizontal water distribution pipe is placed on the hydrolysis acidification tank, and the water distribution pipe is connected to the water inlet.

6. The integrated leachate biological treatment device according to any one of claims 1-5, characterized in that: A sludge pump is installed at the bottom rear of the MBR membrane tank. The sludge pump is connected to a sludge discharge pipeline located outside the tank via a plastic hose. The sludge discharge pipeline is connected to a sludge tank.

7. The integrated leachate biological treatment device according to any one of claims 1-5, characterized in that: The lower side of the hydrolysis acidification tank is provided with a biological packing base, and the biological packing layer is arranged on the biological packing base.

8. The integrated leachate biological treatment device according to any one of claims 1-5, characterized in that: The inlet is connected to the inclined tube sedimentation tank, and the outlet pipe is connected to the activated carbon filter.

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