Landfill leachate treatment equipment and method

Abstract

The invention discloses landfill leachate treatment equipment which is placed between the underground and the ground of a garbage disposal plant in a pre-placement mode, so that the movable landfill leachate treatment equipment is formed; the landfill leachate treatment equipment comprises a coagulation pretreatment part, an activated carbon oxidation treatment part, an aeration biochemical treatment part and a master control end which are arranged from top to bottom, the invention further discloses a landfill leachate treatment method which adopts automatic equipment integrated from top to bottom to treat the landfill leachate from the coagulation reaction of the landfill leachate to the gas-liquid-solid three-phase reaction, to the aerobic / anoxic alternate treatment by intermittent aeration and to the final membrane separation of water. And the whole process is automatically controlled by adopting automatic equipment, so that the working efficiency of landfill leachate treatment is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment in the field of environmental engineering, and in particular to a device and method for treating landfill leachate. Background Art

[0002] Landfill leachate is a high-concentration organic wastewater with complex components. In particular, the mid- and late-stage landfill leachate has the characteristics of high ammonia nitrogen content, poor biodegradability, imbalanced ratio of microbial nutrients, and high heavy metal content. Therefore, the harmless treatment of landfill leachate has always been a global problem. At present, the main methods for treating landfill leachate are physical and chemical methods, biological treatment methods, and land methods, among which biological treatment methods are widely used. However, since landfill leachate contains a variety of toxic and harmful organic substances that are difficult to degrade, especially the poor biodegradability of late-stage leachate, it is not suitable for aerobic biological treatment. In addition, physical treatment methods such as adsorption and membrane filtration are not widely used due to their high costs. The invention patent with the patent number of 201210257786.6 and the patent name of "a method and equipment for treating landfill leachate" discloses a method and equipment for treating landfill leachate. The steps of the treatment method are as follows: (1) passing the landfill leachate into a coagulation reaction tank, adding a soluble iron salt coagulant, carrying out a coagulation reaction, and standing; (2) passing the supernatant obtained after coagulation pretreatment into an ozone / activated carbon oxidation device for a gas-liquid-solid three-phase reaction; the ozone / activated carbon oxidation device is filled with activated carbon and is passed with ozone; (3) passing the effluent after the ozone / activated carbon oxidation treatment into a membrane bioreactor, using intermittent aeration for aerobic / anoxic alternating treatment, and separating the water through a membrane. The treatment method of the present invention has low cost, improves the biodegradability of wastewater, can achieve effective removal of ammonia nitrogen, COD, chromaticity, etc. at the same time, deeply purifies wastewater, has outstanding decolorization effect, and has good sensory effect. The treatment equipment of the present invention occupies a small area, has low operating costs, high stability, and the treatment effect is long-term stable and reliable. However, the operation requires a lot of manual participation, and the leachate needs to be collected before use, thus resulting in the disadvantage of low efficiency in treating landfill leachate. Summary of the invention

[0003] The present invention aims at the above problems and proposes a landfill leachate treatment device and method to solve the above problems.

[0004] In order to achieve the above technical objectives, the present invention adopts a garbage leachate treatment device, which is placed between the underground and the ground of the garbage disposal site in a pre-placed manner to form a movable garbage leachate treatment device;

[0005] The landfill leachate treatment equipment comprises: a coagulation pretreatment part, an activated carbon oxidation treatment part, an aeration biochemical treatment part and a general control end arranged from top to bottom;

[0006] The coagulation pretreatment part is provided with a first input end capable of inputting a soluble iron salt coagulant and a metal capture agent into the coagulation pretreatment part;

[0007] The activated carbon oxidation treatment part is provided with a second input end capable of inputting ozone into the activated carbon oxidation treatment part;

[0008] The aeration and biochemical treatment section is provided with a third input end capable of inputting oxygen into the aeration and biochemical treatment section;

[0009] A first liquid delivery end is provided between the coagulation pretreatment part and the activated carbon oxidation treatment part; a second liquid delivery end is provided between the activated carbon oxidation treatment part and the aeration and biochemical treatment part; a third liquid delivery end for delivering liquid to the outside is provided at the bottom of the aeration and biochemical treatment part;

[0010] The first input end, the second input end, the third input end, the first liquid delivery end, the second liquid delivery end and the third liquid delivery end are all in control connection with the main control end.

[0011] As a preferred embodiment of the present invention, the coagulation pretreatment unit includes a coagulation reaction tank; the activated carbon oxidation treatment unit includes an activated carbon oxidation tank;

[0012] The aeration biochemical treatment unit includes a membrane bioreactor;

[0013] The coagulation reaction tank and the activated carbon oxidation tank are connected by a first connecting frame, and the activated carbon oxidation tank and the membrane bioreactor are connected by a second connecting frame; a steel connecting frame is provided on the side of the coagulation reaction tank, the activated carbon oxidation tank and the membrane bioreactor;

[0014] The first input end includes: a first pressure storage tank storing a soluble iron salt coagulant and a second pressure storage tank storing a metal capture agent; the first pressure storage tank and the coagulation reaction tank are connected via a first pipeline and a first electronic valve; the second pressure storage tank and the coagulation reaction tank are connected via a second pipeline and a second electronic valve;

[0015] The second input end includes: a third pressure storage tank storing ozone, wherein the third pressure storage tank is connected to the activated carbon oxidation tank via a third pipeline and a third electronic valve;

[0016] The third input end comprises: a fourth pressure storage tank storing oxygen, wherein the fourth pressure storage tank is connected to the membrane bioreactor via a fourth pipeline and a fourth electronic valve;

[0017] The first pressure storage tank, the second pressure storage tank, the third pressure storage tank and the fourth pressure storage tank are all fixedly installed on the side of the steel connecting frame;

[0018] The first liquid delivery end includes: a first longitudinal connecting pipe and a first electronic one-way valve located between the bottom of the coagulation reaction tank and the upper end of the activated carbon oxidation tank;

[0019] The second liquid delivery end includes: a second longitudinal connecting pipe and a second electronic one-way valve located between the activated carbon oxidation tank and the upper end of the membrane bioreactor;

[0020] The third liquid delivery end comprises: a third longitudinal connecting pipe and a third electronic one-way valve located at the bottom of the membrane bioreactor;

[0021] The first electronic valve, the second electronic valve, the third electronic valve, the first electronic one-way valve, the second electronic one-way valve and the third electronic one-way valve are all in control connection with the main control end.

[0022] Furthermore, the upper end of the coagulation reaction tank is connected to a garbage storage chamber for placing garbage via a third connecting frame, and a multi-layer screen structure is provided at the bottom of the garbage storage chamber.

[0023] As a further preference of the present invention, the multi-layer screen structure includes three-layer screen structures, namely, a first screen structure, a second screen structure and a third screen structure from top to bottom, the mesh holes of the third screen structure are smaller than the mesh holes of the second screen structure, and the mesh holes of the second screen structure are smaller than the mesh holes of the first screen structure.

[0024] Furthermore, the coagulation reaction tank is provided with a first electronic measuring instrument for measuring liquid volume; the activated carbon oxidation tank is provided with a second electronic measuring instrument for measuring liquid volume; the membrane bioreactor is provided with a third electronic measuring instrument for measuring liquid volume;

[0025] The first electronic measuring instrument, the second electronic measuring instrument and the third electronic measuring instrument are all connected to the main control terminal in a control manner.

[0026] The present invention then discloses a method for treating landfill leachate, comprising the following steps:

[0027] Step 1: When the garbage leachate accumulated in the garbage storage room drips into the coagulation reaction tank through the three-layer screen structure to a certain amount, the first pressure storage tank storing the soluble iron salt coagulant and the second pressure storage tank storing the metal capture agent respectively put a certain amount of soluble iron salt coagulant and a certain amount of metal capture agent into the coagulation reaction tank through the first pipeline, the first electronic valve, the second pipeline, and the second electronic valve under the control of the main control end;

[0028] Step 2: After a period of coagulation treatment, the supernatant after coagulation treatment in the coagulation reaction tank is transported to the activated carbon oxidation tank through the first longitudinal connecting pipe and the first electronic one-way valve under the control of the main control end, and at the same time, the third pressure storage tank storing ozone transports a certain amount of ozone to the activated carbon oxidation tank through the third pipe and the third electronic valve for activated carbon oxidation treatment;

[0029] Step 3: After a period of coagulation activated carbon oxidation treatment, the effluent in the activated carbon oxidation tank that has undergone activated carbon oxidation treatment is transported to the membrane bioreactor through the second longitudinal connecting pipe and the second electronic one-way valve under the control of the main control end, and at the same time, a certain amount of oxygen is transported to the membrane bioreactor through the fourth pipe and the fourth electronic valve from the fourth pressure storage tank storing oxygen, and the fourth pressure storage tank is intermittently opened to intermittently transport oxygen to the membrane bioreactor through the fourth pipe and the fourth electronic valve;

[0030] Step 4: After membrane separation, the final liquid is released and collected through the third longitudinal connecting pipe and the third electronic one-way valve located at the bottom of the membrane bioreactor.

[0031] After the preparation method is improved by the above technology, the present invention has the following advantages:

[0032] 1. The present invention uses an integrated automatic device from top to bottom to treat the landfill leachate, from the coagulation reaction of the landfill leachate, to the gas-liquid-solid three-phase reaction, to the intermittent aeration for aerobic / anoxic alternating treatment, and to the final membrane separation of water, the whole process is automatically controlled by automated equipment, and the working efficiency of landfill leachate treatment is greatly improved;

[0033] 2. The present invention directly installs the above-mentioned equipment at the bottom of the garbage dumping station. Starting from the garbage on the pile, the garbage leachate can be gradually treated after it is formed. There is no need to collect and treat the garbage leachate separately, which further improves the treatment efficiency of the garbage leachate and saves labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Shown is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 Shown is a schematic structural diagram of a multi-layer screen structure in the present invention;

[0036] Figure 3 Shown is a schematic diagram of the position structure of the first electronic measuring instrument in the coagulation reaction tank of the present invention;

[0037] Figure 4 Shown is a schematic diagram of the position structure of the second electronic measuring instrument in the activated carbon oxidation tank of the present invention;

[0038] Figure 5 The schematic diagram of the position structure of the third electronic measuring instrument in the membrane bioreactor of the present invention is shown; wherein, 1, the main control end; 2, the coagulation reaction tank; 3, the activated carbon oxidation tank; 4, the membrane bioreactor; 5, the first connecting frame; 6, the second connecting frame; 7, the steel connecting frame; 8, the first pressure storage tank; 9, the second pressure storage tank; 10, the first pipeline; 11, the first electronic valve; 12, the second pipeline; 13, the second electronic valve; 14, the third pressure storage tank; 15, the third pipeline; 16, the third electronic valve; 17, the fourth pressure storage tank Storage tank; 18. Fourth pipeline; 19. Fourth electronic valve; 20. First longitudinal connecting pipeline; 21. First electronic one-way valve; 22. Second longitudinal connecting pipeline; 23. Second electronic one-way valve; 24. Third longitudinal connecting pipeline; 25. Third electronic one-way valve; 26. Third connecting frame; 27. Garbage storage room; 28. Multi-layer screen structure; 29. ​​First screen structure; 30. Second screen structure; 31. Third screen structure; 32. First electronic measuring instrument; 33. Second electronic measuring instrument; 34. Third electronic measuring instrument. DETAILED DESCRIPTION

[0039] In order to make the purpose and technical solution of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings and by selecting some data as examples. It should be understood that the selected data here are only used to assist in explaining the present invention and are not used to limit the present invention.

[0040] Combination Figure 1 It can be seen that a garbage leachate treatment device is placed between the underground and the ground of a garbage disposal site in a pre-placed manner to form a movable garbage leachate treatment device;

[0041] The garbage leachate treatment equipment of the present invention comprises: a coagulation pretreatment part, an activated carbon oxidation treatment part, an aeration biochemical treatment part and a general control end 1 arranged from top to bottom;

[0042] The coagulation pretreatment part is provided with a first input end capable of inputting a soluble iron salt coagulant and a metal capture agent into the coagulation pretreatment part;

[0043] Wherein, the activated carbon oxidation treatment part is provided with a second input end capable of inputting ozone into the activated carbon oxidation treatment part;

[0044] Wherein, the aeration and biochemical treatment part is provided with a third input end capable of inputting oxygen into the aeration and biochemical treatment part;

[0045] Meanwhile, in the present invention, a first liquid delivery end is provided between the coagulation pretreatment section and the activated carbon oxidation treatment section; a second liquid delivery end is provided between the activated carbon oxidation treatment section and the aeration biochemical treatment section; and a third liquid delivery end for delivering liquid outward is provided at the bottom of the aeration biochemical treatment section;

[0046] In the present invention, the first input end, the second input end, the third input end, the first liquid delivery end, the second liquid delivery end and the third liquid delivery end are all connected to the main control end 1 in a control manner.

[0047] In the present invention, the preferred coagulation pretreatment section includes a coagulation reaction tank 2 ; the activated carbon oxidation treatment section includes an activated carbon oxidation tank 3 ; and the aeration biochemical treatment section includes a membrane bioreactor 4 .

[0048] Depend on Figure 3 It can be seen that a first electronic measuring instrument 32 for measuring the liquid volume is provided in the coagulation reaction tank 2 .

[0049] Depend on Figure 4 It can be seen that a second electronic measuring instrument 33 for measuring the liquid volume is provided in the activated carbon oxidation tank 3 .

[0050] Depend on Figure 5 It can be seen that a third electronic measuring instrument 34 for measuring the liquid volume is provided in the membrane bioreactor 4 .

[0051] In the above structure, the first electronic measuring instrument 32 , the second electronic measuring instrument 33 , and the third electronic measuring instrument 34 are all connected to the main control terminal 1 in a control manner.

[0052] In the above structure, the coagulation reaction tank 2 and the activated carbon oxidation tank 3 are connected by a first connecting frame 5, and the activated carbon oxidation tank 3 and the membrane bioreactor 4 are connected by a second connecting frame 6; at the same time, a steel connecting frame 7 is provided on the side of the coagulation reaction tank 2, the activated carbon oxidation tank 3 and the membrane bioreactor 4.

[0053] In the present invention, the preferred first input end includes: a first pressure storage tank 8 storing a soluble iron salt coagulant and a second pressure storage tank 9 storing a metal capture agent; the first pressure storage tank 8 and the coagulation reaction tank 2 are connected via a first pipe 10 and a first electronic valve 11; the second pressure storage tank 9 and the coagulation reaction tank 2 are connected via a second pipe 12 and a second electronic valve 13.

[0054] In the present invention, the preferred second input end includes: a third pressure storage tank 14 storing ozone, and the third pressure storage tank 14 and the activated carbon oxidation tank 3 are connected via a third pipeline 15 and a third electronic valve 16 .

[0055] In the present invention, the preferred third input end includes: a fourth pressure storage tank 17 storing oxygen, and the fourth pressure storage tank 17 and the membrane bioreactor 4 are connected via a fourth pipeline 18 and a fourth electronic valve 19 .

[0056] In the above structure, the first pressure storage tank 8 , the second pressure storage tank 9 , the third pressure storage tank 14 and the fourth pressure storage tank 17 are all fixedly installed on the side of the steel connecting frame 7 .

[0057] In the present invention, the preferred first liquid delivery end includes: a first longitudinal connecting pipe 20 located between the bottom of the coagulation reaction tank 2 and the upper end of the activated carbon oxidation tank 3 and a first electronic one-way valve 21.

[0058] In the present invention, the preferred second liquid delivery end includes: a second longitudinal connecting pipe 22 and a second electronic one-way valve 23 located between the activated carbon oxidation tank 3 and the upper end of the membrane bioreactor 4 .

[0059] In the present invention, the preferred third liquid delivery end includes: a third longitudinal connecting pipe 24 and a third electronic one-way valve 25 located at the bottom of the membrane bioreactor 4 .

[0060] In the above structure, the first electronic valve 11 , the second electronic valve 13 , the third electronic valve 16 , the first electronic one-way valve 21 , the second electronic one-way valve 23 and the third electronic one-way valve 25 are all connected to the main control terminal 1 in a control manner.

[0061] In the present invention, the upper end of the coagulation reaction tank 2 is connected to a garbage storage chamber 27 for placing garbage via a third connecting frame 26 , and a multi-layer screen structure 28 is provided at the bottom of the garbage storage chamber 27 .

[0062] Depend on Figure 2 It can be seen that in the present invention, the preferred multi-layer screen structure 28 includes three-layer screen structures, which are, from top to bottom, a first screen structure 29, a second screen structure 30 and a third screen structure 31, and the mesh holes of the third screen structure 31 are smaller than the mesh holes of the second screen structure 30, and the mesh holes of the second screen structure 30 are smaller than the mesh holes of the first screen structure 29.

[0063] The present invention then discloses a method for treating landfill leachate, comprising the following steps:

[0064] Step 1: When the garbage leachate accumulated in the garbage storage room 27 drips into the coagulation reaction tank 2 to a certain amount through the three-layer screen structure (the first screen structure 29, the second screen structure 30 and the third screen structure 31), the first pressure storage tank 8 storing the soluble iron salt coagulant and the second pressure storage tank 9 storing the metal scavenger respectively put a certain amount of soluble iron salt coagulant and a certain amount of metal scavenger into the coagulation reaction tank 2 through the first pipeline 10, the first electronic valve 11, the second pipeline 12 and the second electronic valve 13 under the control of the main control end 1;

[0065] Step 2: After a period of coagulation treatment, the supernatant after coagulation treatment in the coagulation reaction tank 2 is transported to the activated carbon oxidation tank 3 through the first longitudinal connecting pipe 20 and the first electronic one-way valve 21 under the control of the main control terminal 1, and at the same time, the third pressure storage tank 14 storing ozone transports a certain amount of ozone to the activated carbon oxidation tank 3 through the third pipe 15 and the third electronic valve 16 for activated carbon oxidation treatment;

[0066] Step 3: After a period of coagulation activated carbon oxidation treatment, the effluent in the activated carbon oxidation tank 3 that has undergone activated carbon oxidation treatment is transported to the membrane bioreactor 4 through the second longitudinal connecting pipe 22 and the second electronic one-way valve 23 under the control of the main control end 1, and at the same time, a certain amount of oxygen is transported to the membrane bioreactor 4 through the fourth pipe 18 and the fourth electronic valve 19 from the fourth pressure storage tank 17 storing oxygen, and the fourth pressure storage tank 17 is intermittently opened to intermittently transport oxygen to the membrane bioreactor 4 through the fourth pipe 18 and the fourth electronic valve 19;

[0067] Step 4: After membrane separation, the final liquid is released and collected through the third longitudinal connecting pipe 24 and the third electronic one-way valve 25 located at the bottom of the membrane bioreactor 4.

[0068] It should be pointed out that the activated carbon oxidation tank 3 needs to be filled with treated activated carbon in advance. This step needs to be completed manually, or automatic conveying equipment can be used to complete the process.

[0069] At the same time, the device of the present invention needs to be pre-dug in a pit large enough to place the device of the present invention before building a temporary garbage dump. After the device of the present invention is placed, the garbage dump chamber 27 is exposed outside the pit for dumping garbage. At the same time, a tunnel can be dug on one side of the pit to facilitate the maintenance and replacement of parts of the device of the present invention, as well as to facilitate the transportation and treatment of the treated garbage leachate.

[0070] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A landfill leachate treatment device, characterized in that: The garbage leachate treatment equipment is placed between the underground and the ground of the garbage treatment site in a pre-placed manner to form a movable garbage leachate treatment equipment; The landfill leachate treatment equipment comprises: a coagulation pretreatment part, an activated carbon oxidation treatment part, an aeration biochemical treatment part and a general control end arranged from top to bottom; The coagulation pretreatment part is provided with a first input end capable of inputting a soluble iron salt coagulant and a metal capture agent into the coagulation pretreatment part; The activated carbon oxidation treatment part is provided with a second input end capable of inputting ozone into the activated carbon oxidation treatment part; The aeration and biochemical treatment section is provided with a third input end capable of inputting oxygen into the aeration and biochemical treatment section; A first liquid delivery end is provided between the coagulation pretreatment part and the activated carbon oxidation treatment part; a second liquid delivery end is provided between the activated carbon oxidation treatment part and the aeration and biochemical treatment part; a third liquid delivery end for delivering liquid to the outside is provided at the bottom of the aeration and biochemical treatment part; The first input end, the second input end, the third input end, the first liquid delivery end, the second liquid delivery end and the third liquid delivery end are all in control connection with the main control end.

2. The landfill leachate treatment equipment according to claim 1, characterized in that: The coagulation pretreatment unit includes a coagulation reaction tank; the activated carbon oxidation treatment unit includes an activated carbon oxidation tank; the aeration biochemical treatment unit includes a membrane bioreactor; The coagulation reaction tank and the activated carbon oxidation tank are connected by a first connecting frame, and the activated carbon oxidation tank and the membrane bioreactor are connected by a second connecting frame; a steel connecting frame is provided on the side of the coagulation reaction tank, the activated carbon oxidation tank and the membrane bioreactor; The first input end includes: a first pressure storage tank storing a soluble iron salt coagulant and a second pressure storage tank storing a metal capture agent; the first pressure storage tank and the coagulation reaction tank are connected via a first pipeline and a first electronic valve; the second pressure storage tank and the coagulation reaction tank are connected via a second pipeline and a second electronic valve; The second input end includes: a third pressure storage tank storing ozone, wherein the third pressure storage tank is connected to the activated carbon oxidation tank via a third pipeline and a third electronic valve; The third input end comprises: a fourth pressure storage tank storing oxygen, wherein the fourth pressure storage tank is connected to the membrane bioreactor via a fourth pipeline and a fourth electronic valve; The first pressure storage tank, the second pressure storage tank, the third pressure storage tank and the fourth pressure storage tank are all fixedly installed on the side of the steel connecting frame; The first liquid delivery end includes: a first longitudinal connecting pipe and a first electronic one-way valve located between the bottom of the coagulation reaction tank and the upper end of the activated carbon oxidation tank; The second liquid delivery end includes: a second longitudinal connecting pipe and a second electronic one-way valve located between the activated carbon oxidation tank and the upper end of the membrane bioreactor; The third liquid delivery end comprises: a third longitudinal connecting pipe and a third electronic one-way valve located at the bottom of the membrane bioreactor; The first electronic valve, the second electronic valve, the third electronic valve, the first electronic one-way valve, the second electronic one-way valve and the third electronic one-way valve are all in control connection with the main control end.

3. A landfill leachate treatment equipment as claimed in claim 2, characterized in that: The upper end of the coagulation reaction tank is connected to a garbage storage chamber for placing garbage through a third connecting frame, and a multi-layer screen structure is provided at the bottom of the garbage storage chamber.

4. The landfill leachate treatment equipment according to claim 3, characterized in that: The multi-layer screen structure includes three layers of screen structures, which are respectively a first screen structure, a second screen structure and a third screen structure from top to bottom. The mesh holes of the third screen structure are smaller than the mesh holes of the second screen structure, and the mesh holes of the second screen structure are smaller than the mesh holes of the first screen structure.

5. The landfill leachate treatment equipment according to claim 3, characterized in that: The coagulation reaction tank is provided with a first electronic measuring instrument for measuring liquid volume; the activated carbon oxidation tank is provided with a second electronic measuring instrument for measuring liquid volume; the membrane bioreactor is provided with a third electronic measuring instrument for measuring liquid volume; The first electronic measuring instrument, the second electronic measuring instrument and the third electronic measuring instrument are all connected to the main control terminal in a control manner.

6. A method for treating landfill leachate according to claim 2, characterized in that: The steps include: Step 1: When the garbage leachate accumulated in the garbage storage room drips into the coagulation reaction tank through the three-layer screen structure to a certain amount, the first pressure storage tank storing the soluble iron salt coagulant and the second pressure storage tank storing the metal scavenger respectively put a certain amount of soluble iron salt coagulant and a certain amount of metal scavenger into the coagulation reaction tank through the first pipeline, the first electronic valve, the second pipeline, and the second electronic valve under the control of the main control end; Step 2: After a period of coagulation treatment, the supernatant after coagulation treatment in the coagulation reaction tank is transported to the activated carbon oxidation tank through the first longitudinal connecting pipe and the first electronic one-way valve under the control of the main control end, and at the same time, the third pressure storage tank storing ozone transports a certain amount of ozone to the activated carbon oxidation tank through the third pipe and the third electronic valve for activated carbon oxidation treatment; Step 3: After a period of coagulation activated carbon oxidation treatment, the effluent in the activated carbon oxidation tank that has undergone activated carbon oxidation treatment is transported to the membrane bioreactor through the second longitudinal connecting pipe and the second electronic one-way valve under the control of the main control end, and at the same time, a certain amount of oxygen is transported to the membrane bioreactor through the fourth pipe and the fourth electronic valve from the fourth pressure storage tank storing oxygen, and the fourth pressure storage tank is intermittently opened to intermittently transport oxygen to the membrane bioreactor through the fourth pipe and the fourth electronic valve; Step 4: After membrane separation, the final liquid is released and collected through the third longitudinal connecting pipe and the third electronic one-way valve located at the bottom of the membrane bioreactor.

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