Improved multi-stage mabr wastewater treatment device

Abstract

The utility model relates to an improved multistage MABR sewage treatment device relates to water treatment technical field, the treatment device of the utility model is by inlet pipe, anaerobic tank, first anoxic tank, first aerobic tank, second anoxic tank, second aerobic tank, third anoxic tank, third aerobic tank, sedimentation tank, phosphorus removal tank, outlet pipe and gas supply system are formed, two stage water inlet, other each processing unit is connected in turn, gas supply system is independently arranged, respectively to each processing unit gas supply, and the outlet pipe is arranged in the phosphorus removal tank end. The device implants MABR processing unit in anoxic tank, utilizes the simultaneous nitrification and denitrification of MABR technology and the aerobic nitrification of rich filler microorganism, improves the treatment efficiency of pollutant, reduces the adding amount of external carbon source simultaneously, adds phosphorus removal tank to remove phosphorus, satisfies the water quality requirement of outlet. The utility model has MABR simultaneous nitrification and denitrification, the full utilization of graded water inlet carbon source, high pollutant removal rate, simple operation, low operating cost, convenient maintenance and other advantages.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology and relates to an improved multi-stage MABR wastewater treatment device. Background Technology

[0002] Currently, the activated sludge process in urban wastewater treatment is improved by using short-cut nitrification-denitrification or multi-stage anaerobic-anoxic-aerobic processes. Patent CN109650541B, "A Wastewater Treatment Method Based on Multi-stage A / O and MABR," sets up a MABR zone, in which the MABR membrane is wound around the surface of the water pipe. The water pipe provides a certain degree of fixation and support for the MABR membrane, but in a sense, it reduces the contact between the MABR membrane and pollutants in the water, thus limiting the effectiveness of the MABR membrane.

[0003] Patent CN214327269U, “A Multi-stage Anoxic and Aerobic Treatment Device Based on MABR,” sets up a multi-stage anoxic and aerobic treatment unit. However, setting up a MABR treatment zone at the front end of the anoxic zone makes implementation difficult. At the same time, the three-stage influent increases the difficulty of the final influent treatment, and the qualified rate of effluent water quality decreases relatively.

[0004] Based on this, the original "a multi-stage anoxic-aerobic treatment device based on MABR" was improved, and the combination of MABR and anoxic-aerobic treatment processes was optimized. The treatment device is a problem that urgently needs to be solved in this field. Utility Model Content

[0005] This invention aims to overcome the shortcomings of existing technologies and provide an improved multi-stage MABR wastewater treatment device. Based on a two-stage influent, it combines MABR with a three-stage anoxic-aerobic process, directly implanting the MABR treatment unit into the anoxic zone. By utilizing MABR technology, simultaneous nitrification and denitrification are achieved in the same reactor under anoxic conditions, resulting in highly efficient nitrogen removal.

[0006] The specific technical solution is as follows: An improved multi-stage MABR wastewater treatment device is characterized by comprising an inlet pipe, an anaerobic tank, a first anoxic tank, a first aerobic tank, a second anoxic tank, a second aerobic tank, a third anoxic tank, a third aerobic tank, a sedimentation tank, a phosphorus removal tank, an outlet pipe, and an air supply system. The inlet pipe is divided into two branches, which enter the anaerobic tank and the second anoxic tank respectively. The anaerobic tank, the first anoxic tank, the first aerobic tank, the second anoxic tank, the second aerobic tank, the third anoxic tank, the third aerobic tank, the sedimentation tank, and the phosphorus removal tank are connected in sequence. The outlet pipe is located at the end of the phosphorus removal tank. The air supply system is set up separately and supplies air to the first anoxic tank, the first aerobic tank, the second anoxic tank, the second aerobic tank, the third anoxic tank, and the third aerobic tank respectively. MABR treatment units are installed in the first, second, and third anoxic tanks; combined packing material treatment units are installed in the first and second aerobic tanks; and MBBR packing material treatment units are installed in the third aerobic tank. The second aerobic tank is equipped with a nitrification liquor return system, in which the nitrification liquor is returned to the front end of the first anoxic tank through the nitrification liquor return pipe; the sedimentation tank is equipped with a sludge discharge system, in which part of the sludge is returned to the front end of the anaerobic tank through the sludge return pipe, and the remaining sludge is discharged from the system through the remaining sludge discharge pipe; the phosphorus removal tank is equipped with a phosphorus removal agent dosing system, an inclined plate and a bottom sludge discharge system, and the phosphorus removal agent dosing system is located at the front end of the phosphorus removal tank.

[0007] Preferably, the ratio of the inlet flow rate of the anaerobic tank inlet pipe to the second anoxic tank inlet pipe is set to 2:1 to 1:1.

[0008] Preferably, the MABR processing unit consists of a MABR membrane module, a membrane frame, an air supply connection pipe, a bottom control valve, a bottom air supply pipe, and a bottom aerator; the number of MABR membrane modules is four or more.

[0009] Preferably, the combined packing treatment unit consists of combined packing, a support, a bottom control valve, a bottom air supply pipe, and a bottom aerator; the number of combined packing is 10 or more.

[0010] Preferably, the MBBR packing treatment unit consists of MBBR packing, an intercepting net, a support, a bottom control valve, a bottom air supply pipe, and a bottom aerator; the intercepting net is positioned above the MBBR packing to intercept the MBBR packing.

[0011] Preferably, the sludge discharge system of the phosphorus removal tank discharges sludge separately through a phosphorus removal sludge discharge pipe.

[0012] This improved multi-stage MABR wastewater treatment device is a modification of the anaerobic tank, where MABR treatment units are implanted into the anoxic tank to form an MABR anoxic treatment tank. Utilizing MABR technology, simultaneous nitrification and denitrification are achieved in the same reactor under anoxic conditions, resulting in highly efficient nitrogen removal. Simultaneously, packing material is used in the aerobic tank to enhance aerobic nitrification. The nitrified liquor from the second aerobic tank is refluxed to simultaneously improve the denitrification effect in the first anoxic tank. The second anoxic tank shares some of the original influent, reducing the amount of external carbon source required for nitrogen removal. A phosphorus removal tank is added after the sedimentation tank, using chemical phosphorus removal to achieve highly efficient phosphorus removal, meeting the requirements of various water qualities for advanced wastewater treatment. This invention offers advantages such as simultaneous nitrification and denitrification in the MABR anoxic tank, full utilization of carbon sources in the staged influent, high pollutant removal rate, simple operation, low operating cost, and easy maintenance. Attached Figure Description

[0013] AppendixFigure 1 This is a schematic diagram of the process flow of this utility model.

[0014] Appendix Figure 2 This is a schematic diagram of the elevation structure of this utility model.

[0015] Appendix Figure 3 This is a schematic diagram of the membrane treatment unit structure of this utility model.

[0016] Appendix Figure 4 This is a schematic diagram of the combined packing treatment unit structure of this utility model.

[0017] Appendix Figure 5 This is a schematic diagram of the MBBR packing treatment unit structure of this utility model.

[0018] In the diagram: 1. Inlet pipe; 101. Inlet pipe for the anaerobic tank; 102. Inlet pipe for the second anoxic tank; 2. Anaerobic tank; 3. First anoxic tank; 301. MABR membrane module; 302. Air supply connection pipe; 303. Membrane frame; 304. Bottom control valve; 305. Bottom air supply pipe; 306. Bottom aerator; 4. First aerobic tank; 401. Combined packing material; 402. Support frame; 5. Second anoxic tank; 6. Second aerobic tank; 601. Nitrifying liquid. 7. Return pipe, 8. Third anoxic tank, 9. Third aerobic tank, 10. MBBR packing, 11. Interception net, 12. Sedimentation tank, 13. Sludge discharge pipe, 14. Excess sludge discharge pipe, 15. Sludge return pipe, 16. Phosphorus removal tank, 17. Phosphorus removal agent dosing system, 18. Inclined plate, 19. Phosphorus removal sludge discharge pipe, 10. Outlet, 11. Air supply system, 12. Air supply pipe, 12. Air supply control valve. Detailed Implementation

[0019] Combination Figures 1 to 5 The present invention provides a further description of an improved multi-stage MABR wastewater treatment device: An improved multi-stage MABR wastewater treatment device comprises an inlet pipe 1, an anaerobic tank 2, a first anoxic tank 3, a first aerobic tank 4, a second anoxic tank 5, a second aerobic tank 6, a third anoxic tank 7, a third aerobic tank 8, a sedimentation tank 9, a phosphorus removal tank 10, an outlet pipe 11, and an air supply system 12. The inlet pipe 1 is divided into two branches, one leading to the anaerobic tank 2 and the other to the second anoxic tank 6. The anaerobic tank 2, the first anoxic tank 3, the first aerobic tank 4, the second anoxic tank 5, the second aerobic tank 6, the third anoxic tank 7, the third aerobic tank 8, the sedimentation tank 9, and the phosphorus removal tank 10 are connected sequentially. The outlet pipe 11 is located at the end of the phosphorus removal tank 10. The air supply system 12 is separately configured and supplies air to the first anoxic tank 3, the first aerobic tank 4, the second anoxic tank 5, the second aerobic tank 6, and the third anoxic tank 7. The first anoxic tank 3, the second anoxic tank 5, and the third anoxic tank 7 are equipped with MABR treatment units; the first aerobic tank 4 and the second aerobic tank 6 are equipped with combined packing treatment units; the third aerobic tank 8 is equipped with an MBBR packing treatment unit; the second aerobic tank 6 is equipped with a nitrification liquor return system, and the nitrification liquor is returned to the front end of the first anoxic tank 3 through the nitrification liquor return pipe 601; the sedimentation tank 9 is equipped with a sludge discharge system, and part of the sludge is returned to the front end of the anaerobic tank 2 through the sludge return pipe 903, and the remaining sludge is discharged from the system through the remaining sludge discharge pipe 902; the phosphorus removal tank 10 is equipped with a phosphorus removal agent dosing system 1001, an inclined plate 1002, and a bottom sludge discharge system 1003, and the phosphorus removal agent dosing system 1001 is located at the front end of the phosphorus removal tank 10.

[0020] Example 1: Water treatment capacity of 2000m³ 3 / d, the processing device is set according to the above implementation method, and the specific implementation method also includes the following: The influent flow ratio of the anaerobic tank inlet pipe 101 and the second anoxic tank inlet pipe 102 in inlet pipe 1 is set to 2:1; 6 MABR treatment units are set in the first anoxic tank 3, 6 MABR treatment units are set in the second anoxic tank 5, and 8 MABR treatment units are set in the third anoxic tank 7. The MABR treatment unit is composed of MABR membrane module 301, membrane frame 303, air supply connection pipe 302, bottom control valve 304, bottom air supply pipe 305, and bottom aerator 306. One MABR treatment unit contains 20 MABR membrane modules 301. Four sets of combined packing treatment units are set in the first aerobic tank 4 and four sets of combined packing treatment units are set in the second aerobic tank 6. The volume filling ratio of the combined packing treatment units is 2 / 3. The combined packing treatment unit is composed of combined packing 401, support 402, bottom control valve 304, bottom air supply pipe 305 and bottom aerator 306. Each set of combined packing treatment units contains 100 or more combined packings 401, which are evenly arranged inside the support and fixed to the support inside the support. The third aerobic tank 8 is equipped with an MBBR packing treatment unit, which consists of MBBR packing 801, an intercepting net 802, a support 402, a bottom control valve 304, a bottom air supply pipe 305, and a bottom aerator 306. The intercepting net 802 is positioned above the MBBR packing 801 to intercept the MBBR packing 801 and prevent its loss. An external air supply system 12 is installed, supplying air to the first anoxic tank 3, the first aerobic tank 4, the second anoxic tank 5, the second aerobic tank 6, the third anoxic tank 7, and the third aerobic tank 8 via air supply pipes 1201. An air supply control valve 1202 is installed in front of each tank to control the air supply demand of each unit.

[0021] The second aerobic tank 6 is equipped with a nitrification liquid return system, in which the nitrification liquid is returned to the front end of the first anoxic tank 3 through the nitrification liquid return pipe 601, and the nitrification liquid return ratio is controlled to be less than or equal to 200%; the sedimentation tank 9 is equipped with a sludge return system, and the sludge return ratio is controlled to be less than or equal to 100%; the phosphorus removal tank 10 has a separate sludge discharge system that discharges sludge through the phosphorus removal sludge discharge pipe 1003.

[0022] The water quality after treatment by the above-mentioned treatment device can meet the design requirements for effluent water quality, and the main effluent water quality indicators can meet the Class A standard of the "Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants" (GB18918-2002).

[0023] The above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made based on the substance of the content of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An improved multi-stage MABR wastewater treatment device, characterized in that: It consists of an inlet pipe, an anaerobic tank, a first anoxic tank, a first aerobic tank, a second anoxic tank, a second aerobic tank, a third anoxic tank, a third aerobic tank, a sedimentation tank, a phosphorus removal tank, an outlet pipe, and an air supply system. The inlet pipe is divided into two lines, which enter the anaerobic tank and the second anoxic tank respectively. The anaerobic tank, the first anoxic tank, the first aerobic tank, the second anoxic tank, the second aerobic tank, the third anoxic tank, the third aerobic tank, the sedimentation tank, and the phosphorus removal tank are connected in sequence. The outlet pipe is located at the end of the phosphorus removal tank. The air supply system is set up separately and supplies air to the first anoxic tank, the first aerobic tank, the second anoxic tank, the second aerobic tank, the third anoxic tank, and the third aerobic tank respectively. MABR treatment units are installed in the first, second, and third anoxic tanks; combined packing material treatment units are installed in the first and second aerobic tanks; and MBBR packing material treatment units are installed in the third aerobic tank. The second aerobic tank is equipped with a nitrification liquor return system, in which the nitrification liquor is returned to the front end of the first anoxic tank through the nitrification liquor return pipe; the sedimentation tank is equipped with a sludge discharge system, in which part of the sludge is returned to the front end of the anaerobic tank through the sludge return pipe, and the remaining sludge is discharged from the system through the remaining sludge discharge pipe; the phosphorus removal tank is equipped with a phosphorus removal agent dosing system, an inclined plate and a bottom sludge discharge system, and the phosphorus removal agent dosing system is located at the front end of the phosphorus removal tank.

2. The improved multi-stage MABR wastewater treatment device according to claim 1, characterized in that: The inlet flow rate ratio of the anaerobic tank inlet pipe and the second anoxic tank inlet pipe is set to 2:1 to 1:

1.

3. The improved multi-stage MABR wastewater treatment device according to claim 1, characterized in that: The MABR processing unit consists of a MABR membrane module, a membrane frame, an air supply connection pipe, a bottom control valve, a bottom air supply pipe, and a bottom aerator; the number of MABR membrane modules is four or more.

4. The improved multi-stage MABR wastewater treatment device according to claim 1, characterized in that: The combined packing treatment unit consists of combined packing, a support frame, a bottom control valve, a bottom air supply pipe, and a bottom aerator; the number of combined packing is 10 or more.

5. The improved multi-stage MABR wastewater treatment device according to claim 1, characterized in that: The MBBR packing treatment unit consists of MBBR packing, an intercepting net, a support frame, a bottom control valve, a bottom air supply pipe, and a bottom aerator; the intercepting net is positioned above the MBBR packing to intercept the MBBR packing.

6. The improved multi-stage MABR wastewater treatment device according to claim 1, characterized in that: The sludge discharge system of the phosphorus removal tank discharges sludge separately through the phosphorus removal sludge discharge pipe.

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