CN203238141U - Sewage biological treatment membrane filtration system - Google Patents

Abstract

The utility model discloses a sewage biological treatment membrane filtration system, which comprises a grid well, a regulating pool, an anoxic pool, an aerobic pool, a membrane filtering pool and a clean water pool which are sequentially connected; the membrane filtering pool is provided with membrane components , the upper water collection pipe of the membrane module is connected with the suction pump through the pipeline, and the lower part of the membrane module is connected with the cleaning blower through the pipeline; the bottom of the membrane filter tank is provided with an aeration pan, and the aeration pan is connected with the aeration blower through the pipeline ; The bottom of the partition wall between the aerobic pool and the membrane filter pool is provided with an axial flow pump. The utility model optimizes the process of sewage treatment, which is a biochemical reaction pool system for sewage treatment with few reactors, few steps and high efficiency. At the same time, the internal circulation denitrification technology is used to denitrify and dephosphorize the sewage, directly in the pool The membrane module is used to filter the water, no sedimentation tank is required, and the floor space is small.

Description

A sewage biological treatment membrane filtration system

technical field

The utility model relates to the technical field of sewage treatment, in particular to a sewage biological treatment membrane filtration system.

Background technique

Sewage biological treatment is a general term for treating sewage with biological methods. It is one of the most widely used technologies in sewage biological treatment. Sewage biological treatment mainly uses the decomposition of microorganisms to convert organic matter in sewage into simple inorganic substances, so that sewage can be obtained Purification can be divided into two categories: anaerobic biological treatment and aerobic biological treatment according to the demand for oxygen.

The removal of nitrogen and phosphorus is particularly important in the process of sewage treatment. The eutrophic oxidation of water caused by excessive discharge of nitrogen and phosphorus is still a major problem in water pollution. Sewage treatment is no longer only for the purpose of removing organic matter (COD, etc.), but It is necessary to remove both organic matter and nitrogen and phosphorus, and reduce eutrophication and oxidation of water bodies. Traditional biological nitrogen and phosphorus removal technologies, including A/0, improved A/0, oxidation ditch and other processes, are generally effective in nitrogen and phosphorus removal. However, there are many reactors, complex processes, and high energy consumption. In order to achieve better nitrogen and phosphorus removal effects at the same time, it is necessary to increase sludge reflux or add carbon sources, which not only increases the operating costs of the process, but also produces a large amount of residual pollution. mud. Denitrification, denitrification and phosphorus removal technology has been developed in recent years. It uses nitrate instead of oxygen as the electron acceptor for phosphorus removal, and denitrification and phosphorus accumulation bacteria combine the denitrification and phosphorus removal processes into one, which can overcome the traditional process. The contradiction between denitrification and phosphorus removal, reducing aeration and reducing sludge discharge, is a highly efficient, energy-saving and sustainable denitrification and phosphorus removal process. This is the current research hotspot and inevitable trend of urban sewage denitrification and phosphorus removal technology. . There are a lot of studies on denitrification denitrification and phosphorus removal technology. Although most of the current methods can achieve better treatment effects, it is common in the process to use multiple sedimentation tanks to separate denitrification phosphorus accumulating bacteria. There are many devices, many steps, small effective volume of the reactor, low efficiency, inconvenient operation and many other shortcomings.

After biological treatment, sewage needs sedimentation and filtration treatment. The existing technology is sedimentation tank, but the sedimentation effect of sewage after biological treatment is not good, often needs to add chemicals, and occupies a large area.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a sewage biological treatment membrane filtration system to optimize the process of sewage treatment. This is a biochemical reaction tank system for sewage treatment with fewer reactors, fewer steps and high efficiency. , At the same time, the internal circulation denitrification technology is used to denitrify and dephosphorize the sewage, and the membrane module is used to filter the water directly in the pool, without the need for a sedimentation tank, and the footprint is small.

The purpose of this utility model is mainly achieved through the following technical proposals: a membrane filtration system for sewage biological treatment, including grid wells, regulating tanks, anoxic tanks, aerobic tanks, membrane filter tanks and clear water tanks connected in sequence; Membrane modules are installed in the membrane filter tank, the upper water collection pipe of the membrane module is connected with the suction pump through the pipeline, and the lower part of the membrane module is connected with the cleaning blower through the pipeline; the bottom of the membrane filter tank is provided with an aeration plate, and the aeration plate It is connected with an aeration blower through a pipeline; an axial flow pump is arranged at the bottom of the partition wall between the aerobic tank and the membrane filter tank.

The anoxic pool is provided with elastic biological filler, and the bottom of the anoxic pool is provided with a water distribution pipe, and the water distribution pipe is connected to the lifting pump at the bottom of the regulating pool through a pipeline.

The aerobic tank is provided with combined biological filler, and the bottom of the aerobic tank is provided with an aeration pipe, and the aeration pipe is connected with an aeration blower through a pipeline.

A dissolved oxygen meter is arranged in the aerobic pool.

Further, a cleaning pump is provided at the inner bottom of the clear water tank, and the cleaning pump is connected to the upper part of the membrane module through a cleaning pipe.

The working principle of the utility model: the sewage to be treated first enters the grid well from the water inlet pipe, the grid machine removes the larger suspended matter in the sewage, and then enters the regulating pool, and the sewage with uneven water quality and water volume is placed in the regulating pool Stay for a certain period of time to fully mix the sewage in the regulating tank to ensure the uniform and stable operation of the subsequent treatment structures. The sewage treated in the regulating tank is pumped into the anoxic pool through the lifting pump, and the sewage is evenly distributed in the anoxic pool through the water distribution pipe. In the anoxic pool, part of the suspended matter is removed and the load indicators such as SS, BOD, and COD of the sewage are reduced. The anoxic pool converts macromolecular substances into small molecular substances, and converts ring structures into chain structures, further improving the waste water. The BOD/COD ratio increases the biodegradability of wastewater and creates conditions for subsequent aerobic biochemical treatment. The elastic biofiller is conducive to the growth of microorganisms.

Then the sewage enters the aerobic tank and the membrane filter tank. The aerobic tank is equipped with a combined biological filler, and the bottom of the aerobic tank is provided with an aeration tube, and the aeration tube is connected to the aeration blower through a pipeline, and the aerobic tank and the membrane filter Air is blown into the pool, and the aeration tube and aeration disc disperse the air into tiny bubbles, increasing the dissolved oxygen in the water. The dissolved oxygen meter can detect the dissolved oxygen in the water in real time and control the amount of air blown in. In the aerobic pool, the adsorption of the biofilm on the surface of the composite biofiller and the metabolism of microorganisms are used to purify the sewage. The microorganisms in the biofilm use part of the organic matter in the sewage under aerobic conditions to synthesize new catabolize another part of organic matter in order to obtain the energy needed for cell synthesis, and the final products are stable substances such as carbon dioxide and water. The axial flow pump returns the sewage in the membrane filter tank to the aerobic tank, and at the same time, the return pump returns the bottom part of the sludge, thereby improving the nitrogen and phosphorus removal effect of sewage biological treatment.

The biochemical sewage is in the membrane filter tank, and the membrane module pumps the clean water from the membrane filter tank into the clean water tank through the suction pump to complete the biological treatment of the sewage. The nominal pore size of the membrane module is 0.1 micron. When the membrane module needs to be cleaned, the cleaning pump and cleaning blower are started to clean the membrane module with air and water, and the dosing device adds cleaning agents to restore the filtration effect of the membrane module.

Compared with the prior art, the utility model has the following beneficial effects: the sewage biological treatment membrane filtration device of the utility model optimizes the process of sewage treatment, and can shorten the process flow of sewage treatment. High biochemical reaction tank system for sewage treatment; at the same time, the internal circulation denitrification technology is used to denitrify and dephosphorize the sewage, reducing the return of traditional sludge and reducing the amount of aeration; a separate membrane filter tank is set up, directly in the pool The membrane module is used to filter the water, no sedimentation tank is required, the floor area is small, and the use of chemicals in the subsequent sedimentation tank is reduced; the impact load is strong and the operation is stable.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a top view of the utility model.

The names corresponding to the reference signs in the attached drawings are: 1. water inlet pipe, 2. grid well, 3. grid machine, 4. regulating tank, 5. lift pump, 6. flow meter, 7. anoxic tank, 8. Aerobic tank, 9. Dissolved oxygen meter, 10. Water distribution pipe, 11. Elastic biological filler, 12. Combined biological filler, 13. Aeration tube, 14. Return pump, 15. Membrane filter tank, 16. Axial flow Pump, 17, aeration disc, 18, aeration blower, 19, membrane module, 20, cleaning blower, 21, suction pump, 22, clean water tank, 23, outlet pipe, 24, cleaning pump, 25, cleaning pipe, 26. Dosing device.

Detailed ways

The utility model will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto.

Embodiment: as shown in Fig. 1, Fig. 2, a kind of sewage biological treatment membrane filtration system, comprises grid well 2, regulating pond 4, anoxic pond 7, aerobic pond 8, membrane filter pond 15 and Clean water pool 22; said membrane filter tank 15 is provided with membrane module 19, the upper water collection pipe of membrane module 19 is connected with suction pump 21 through pipeline, and the bottom of membrane module 19 is connected with cleaning blower 20 through pipeline; said membrane filter An aeration pan 17 is arranged at the bottom of the pool 15, and the aeration pan 17 is connected to an aeration blower 18 through a pipe;

The anoxic pool 7 is provided with an elastic biological filler 11, and the bottom of the anoxic pool 7 is provided with a water distribution pipe 10, and the water distribution pipe 10 is connected to the lifting pump 5 at the bottom of the adjustment pool 4 through a pipeline.

The aerobic tank 8 is provided with a combined biological filler 12, and the bottom of the aerobic tank 8 is provided with an aeration pipe 13, and the aeration pipe 13 is connected with an aeration blower 18 through a pipe.

The aerobic pool 8 is provided with a dissolved oxygen meter 9 .

Further, a cleaning pump 24 is provided at the inner bottom of the clear water pool 22 , and the cleaning pump 24 is connected to the upper part of the membrane module 19 through a cleaning pipe 25 .

When the utility model is working, the sewage to be treated first enters the grid well 2 from the water inlet pipe 1, and the grid machine 3 removes larger suspended matter in the sewage, and then enters the regulating pool 4, and the sewage with uneven water quality and water volume Stay in the regulating tank 4 for a certain period of time, so that the sewage is fully mixed in the regulating tank 4 to ensure the uniform and stable operation of the follow-up treatment structures. The water distribution pipes 10 are evenly distributed in the anoxic pool 7, and part of the suspended matter is removed in the anoxic pool 7 to reduce the SS, BOD, COD and other load indicators of the sewage. The anoxic pool 7 converts macromolecular substances into small molecular substances. The ring structure is converted into a chain structure, which further increases the BOD/COD ratio of the wastewater, increases the biodegradability of the wastewater, and creates conditions for subsequent aerobic biochemical treatment. The elastic biofiller 11 is conducive to the growth of microorganisms.

Then the sewage enters the aerobic tank 8 and the membrane filter tank 15, the aerobic tank 8 is provided with a combined biological filler 12, the bottom of the aerobic tank 8 is provided with an aeration pipe 13, and the aeration pipe 13 passes through the pipeline and the aeration blower 18 Connect, blow air into the aerobic tank 8 and the membrane filter tank 15, the aeration tube 13 and the aeration disc 17 disperse the air into tiny air bubbles, which increases the dissolved oxygen in the water, and the dissolved oxygen meter 9 can detect the dissolved oxygen in the water in real time , to control the amount of blown air. In the aerobic pool 8, the adsorption of the biofilm on the surface of the combined biofiller 12 and the metabolism of microorganisms are used to purify the sewage. The microorganisms in the biofilm use a part of the organic matter in the sewage under aerobic conditions. For the synthesis of new cells, another part of organic matter is catabolized to obtain the energy required for cell synthesis, and the final products are stable substances such as carbon dioxide and water. The axial flow pump 16 returns the sewage in the membrane filter tank 15 to the aerobic tank 8, and at the same time, the return pump 14 returns the sludge at the bottom, thereby improving the nitrogen and phosphorus removal effect of the sewage biological treatment.

The biochemical sewage is in the membrane filter tank 15, and the membrane module 19 draws clear water from the membrane filter tank 15 into the clean water tank 22 through the suction pump 21 to complete the biological treatment of the sewage. The nominal pore size of the membrane module 19 is 0.1 micron . When the membrane module 19 needs to be cleaned, the cleaning pump 24 and the cleaning blower 20 are started to clean the membrane module 19 with air and water, and the dosing device 26 adds cleaning agents to restore the filtration effect of the membrane module 19.

As mentioned above, the utility model can be well realized.

Claims (5)

1. a biological sewage treatment membrane filtration system is characterized in that: comprise grille well (2), equalizing tank (4), anoxic pond (7), Aerobic Pond (8), membrane filtration pond (15) and the clean water basin (22) connected successively; Be provided with membrane module (19) in the described membrane filtration pond (15), the upper-part centralized water pipe of membrane module (19) is connected with suction pump (21) by pipeline, and the bottom of membrane module (19) is connected with cleaning blower (20) by pipeline; The bottom in described membrane filtration pond (15) is provided with aeration plate (17), and aeration plate (17) is connected with aeration blower (18) by pipeline; Partition wall bottom between described Aerobic Pond (8) and membrane filtration pond (15) is provided with propeller pump (16).

2. a kind of biological sewage treatment membrane filtration system according to claim 1, it is characterized in that: be provided with elastic biological filler (11) in the described anoxic pond (7), the bottom of anoxic pond (7) is provided with water distributor (10), and water distributor (10) is connected by the lift pump (5) of pipeline with equalizing tank (4) bottom.

3. a kind of biological sewage treatment membrane filtration system according to claim 1, it is characterized in that: be provided with combination biologic packing material (12) in the described Aerobic Pond (8), the bottom of Aerobic Pond (8) is provided with aeration tube (13), and aeration tube (13) is connected with aeration blower (18) by pipeline.

4. a kind of biological sewage treatment membrane filtration system according to claim 1 is characterized in that: be provided with dissolved oxygen instrument (9) in the described Aerobic Pond (8).

5. a kind of biological sewage treatment membrane filtration system according to claim 1, it is characterized in that: described clean water basin (22) inner bottom part is provided with scavenging pump (24), and scavenging pump (24) is connected with the top of membrane module (19) by wash tube (25).

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