Domestic sewage treatment system

Abstract

The utility model discloses a domestic sewage treatment system, which is characterized in that two partition walls are arranged in an adjusting tank to divide the adjusting tank into a first small tank, a second small tank and a third small tank, a first drainage end of the first small tank is sequentially connected with an anaerobic tank and an aerobic tank, and a second drainage end of the second small tank is connected with the aerobic tank; a third drainage end of the third small pool is connected with the MBR biological membrane reaction pool, so that after the sewage is divided into three levels of small pollution degree, medium pollution degree and large pollution degree, the sewage of different degrees generated according to the actual water use condition can be specifically treated instead of all the sewage passing through the whole process of the sewage treatment system; therefore, waste of materials in the water treatment process can be avoided, and the overall sewage treatment efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment equipment, in particular to a domestic sewage treatment system. Background Art

[0002] The main pollutants in domestic sewage are organic pollutants. At present, the commonly used treatment methods for domestic sewage in China are mainly biochemical treatment. The commonly used secondary treatment processes for domestic sewage mainly include A / O process, A / A / O process, contact oxidation process, etc. After secondary biochemical treatment, the deep treatment process of coagulation-sedimentation-filtration is usually used. At present, the domestic sewage treatment system has problems such as complex process, large footprint, high investment, and short equipment life. Moreover, in the water treatment process of the current domestic sewage treatment system, no matter what degree of pollution the sewage is, it needs to go through the entire process from beginning to end. It is impossible to carry out targeted water treatment according to the actual water use situation. In the process, there are inevitably problems of waste of process materials and low sewage treatment efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing domestic sewage treatment system cannot perform water treatment in a targeted manner according to the actual water use situation, and there are inevitably defects such as waste of process materials and low sewage treatment efficiency in the process. The utility model provides a domestic sewage treatment system to solve the above defects.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A domestic sewage treatment system comprises a regulating tank, an anaerobic tank and an aerobic tank, wherein the drainage end of the aerobic tank is connected to an MBR biofilm reaction tank and a clean water tank in sequence, two partition walls are arranged in the regulating tank to divide it into a first small tank, a second small tank and a third small tank, wherein a first water inlet end and a first drainage end are respectively arranged at two ends of the first small tank, the first drainage end is connected to the anaerobic tank and the aerobic tank in sequence, a second water inlet end and a second drainage end are respectively arranged at two ends of the second small tank, the second drainage end is connected to the aerobic tank, a third water inlet end and a third drainage end are respectively arranged at two ends of the third small tank, and the third drainage end is connected to the MBR biofilm reaction tank.

[0006] A further technical solution is that a first water collection tank is arranged at the first drainage end, a first water pump is arranged in the first small tank, the first water pump is connected to the first water collection tank through a first drainage pipe, and the first water collection tank is connected to the anaerobic tank through a first water supply pipe.

[0007] A further technical solution is that a second water collection tank is arranged at the second drainage end, a second water pump is arranged in the second small tank, the second water pump is connected to the second water collection tank through a second drainage pipe, and the second water collection tank is connected to the aerobic tank through a second water supply pipe.

[0008] A further technical solution is that a third water collection tank is arranged at the third drainage end, a third water pump is arranged in the third small tank, the third water pump is connected to the third water collection tank through a third drainage pipe, and the third water collection tank is connected to the MBR biofilm reaction tank through a third water supply pipe.

[0009] A further technical solution is that water inlet pools are arranged at the first water inlet end, the second water inlet end and the third water inlet end, water inlets are arranged on the side walls of the water inlet pools, and grilles are arranged at the water inlets.

[0010] In summary, due to the adoption of the above technical scheme, the beneficial effect of the utility model is as follows: by setting two partition walls in the regulating tank, it is divided into a first small tank, a second small tank and a third small tank, wherein the first drainage end of the first small tank is connected to the anaerobic tank and the aerobic tank in sequence, the second drainage end of the second small tank is connected to the aerobic tank, and the third drainage end of the third small tank is connected to the MBR biofilm reaction tank. In this way, after the sewage is divided into three levels of small, medium and large pollution degrees, the sewage with a small pollution degree enters the third small tank and the MBR biofilm reaction tank of the regulating tank in sequence for treatment, the sewage with a medium pollution degree enters the second small tank, the aerobic tank and the MBR biofilm reaction tank of the regulating tank in sequence for treatment, and the sewage with a large pollution degree enters the first small tank, the anaerobic tank, the aerobic tank and the MBR biofilm reaction tank of the regulating tank in sequence for treatment. In this way, the sewage of different degrees generated according to the actual water use situation can be treated in a targeted manner, instead of all sewage passing through the entire process of the sewage treatment system. This can avoid wasting materials in the water treatment process and can improve the overall sewage treatment efficiency.

[0011] The AO+MBR membrane process combines the advantages of anaerobic conditions, aerobic conditions and membrane bioreactors, has the characteristics of synchronous wastewater treatment and sludge reduction, maintains high active sludge concentration, and ensures the treatment of the most polluted sewage. Compared with traditional sewage treatment systems, it has a series of advantages such as high treatment efficiency, good effluent quality, compact layout and small footprint, easy to realize automatic control, simple operation and management, and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 yes Figure 1 A schematic diagram of the structure in another perspective of the state shown;

[0014] Figure 3 This is a schematic diagram of the structure of the utility model after adding a cover plate for closure;

[0015] Figure 4 It is a schematic diagram of the connection relationship between the first small pool, anaerobic pool, aerobic pool and MBR biofilm reaction pool of the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1-Figure 4 shown.

[0018] A domestic sewage treatment system comprises a regulating tank 2, an anaerobic tank 3 and an aerobic tank 8, wherein the drainage end of the aerobic tank 8 is connected in sequence to an MBR biofilm reaction tank 4 and a clean water tank 5, two partition walls are arranged in the regulating tank 2 to divide it into a first small tank 9, a second small tank 10 and a third small tank 11, wherein a first water inlet end 12 and a first drainage end 13 are respectively arranged at both ends of the first small tank 9, the first drainage end 13 is connected in sequence to the anaerobic tank 3 and the aerobic tank 8, a second water inlet end 14 and a second drainage end 15 are respectively arranged at both ends of the second small tank 10, the second drainage end 15 is connected to the aerobic tank 8, a third water inlet end 16 and a third drainage end 17 are respectively arranged at both ends of the third small tank 11, and the third drainage end 17 is connected to the MBR biofilm reaction tank 4.

[0019] During use, after the sewage is divided into three levels of small, medium and large pollution, the sewage with small pollution enters the third small pool 11 of the regulating tank 2 and the MBR biofilm reaction tank 4 for treatment in turn, the sewage with medium pollution enters the second small pool 10, the aerobic pool 8 and the MBR biofilm reaction tank 4 of the regulating tank 2 in turn for treatment, and the sewage with large pollution enters the first small pool 9, the anaerobic pool 3, the aerobic pool 8 and the MBR biofilm reaction tank 4 of the regulating tank 2 in turn for treatment, wherein the sewage with small pollution comes from washing face, washing hands, bathing, etc., wherein the sewage with medium pollution comes from kitchen water such as washing pots and dishes, and the sewage with high pollution comes from toilet water, etc. The anaerobic pool 3 is connected to the aerobic pool 8 through a sewage pipeline, and the aerobic pool 8 is connected to the MBR biofilm reaction tank 4 through a sewage pipeline. The MBR biofilm reaction tank 4 is connected to the sludge tank 8 through a sludge return pump 7, and the outlet of the water production pump of the MBR biofilm reaction tank 4 is connected to the clean water tank 5, and the treated water is lifted to the reuse point by the lifting pump 6 of the clean water tank 5. A grille 1 is provided at the inlet end of the regulating tank 2, and an aeration pipe is provided at the bottom end of the regulating tank 2, so that some substances in the sewage react chemically with oxygen to cause oxidation and decomposition. The anaerobic tank 3 is internally installed with elastic fillers, and a perforated aeration pipe is provided at the bottom end. Through stirring, the sludge is suspended to avoid the increase of DO. The aerobic tank 8 is internally installed with a composite filler, and an aeration pipe is provided at the bottom end. Strong aeration is adopted, and the gas volume is reduced in the rear section to reduce the DO content of the internal circulation liquid to ensure the anoxic state of the anaerobic tank 3. An MBR membrane is suspended in the MBR biofilm reaction tank 4, which is a PVDF curtain membrane, which can efficiently separate solids and liquids, make suspended matter and turbidity close to zero, and can be directly reused. The utility model is used in the regulating tank 2, the anaerobic tank 3, the aerobic tank 8 and the MBR biofilm reaction tank 4 with a cover plate closed, and can also be used after being buried underground.

[0020] The utility model can specifically treat sewage of different degrees generated according to actual water use conditions, instead of all sewage going through the entire process of the sewage treatment system. This can avoid wasting materials in the water treatment process, such as chemicals in the sewage treatment process, and can improve the overall sewage treatment efficiency.

[0021] The first drainage end 13 is provided with a first water collection tank 18, a first water pump 19 is provided in the first small pool 9, the first water pump 19 is connected to the first water collection tank 18 through a first drainage pipe 20, and the first water collection tank 18 is connected to the anaerobic tank 3 through a first water supply pipe 21. The second drainage end 15 is provided with a second water collection tank 23, a second water pump 24 is provided in the second small pool 10, the second water pump 24 is connected to the second water collection tank 23 through a second drainage pipe 25, and the second water collection tank 23 is connected to the aerobic tank 8 through a second water supply pipe 26. The third drainage end 17 is provided with a third water collection tank 27, a third water pump 28 is provided in the third small pool 11, the third water pump 28 is connected to the third water collection tank 27 through a third drainage pipe 29, and the third water collection tank 27 is connected to the MBR biofilm reaction tank 4 through a third water supply pipe 30. A water inlet pool 31 is disposed at the first water inlet end 12 , the second water inlet end 14 and the third water inlet end 16 . A water inlet port 32 is disposed on a side wall of the water inlet pool 31 . A grille 1 is disposed at the water inlet port 32 .

[0022] Sewage with a high degree of pollution flows into the regulating tank 2 after the larger floating debris in the sewage is intercepted by the screen 1. After the water quality and water volume are homogenized by the regulating tank 2, it passes through the anaerobic tank 3, the aerobic tank 8 and the MBR biofilm reactor 4 in sequence. The organic pollutants in the sewage are fully degraded and decomposed by microorganisms and separated from the water. The mixed liquid of the aerobic tank 8 flows back to the anaerobic tank 3 through the reflux device. The effluent of the aerobic tank 8 flows into the MBR biofilm reactor 4 for solid-liquid separation, and the effluent is reused after disinfection. Sewage with a medium degree of pollution flows into the regulating tank 2 after the larger floating debris in the sewage is intercepted by the screen 1. After the water quality and water volume are homogenized by the regulating tank 2, it passes through the aerobic tank 8 and the MBR biofilm reactor 4, and the organic matter in the sewage is decomposed into inorganic matter, thereby removing pollutants. The effluent of the aerobic tank 8 flows into the MBR biofilm reactor 4 for solid-liquid separation, and the effluent is reused after disinfection.

[0023] The above are only preferred embodiments of the present invention.

Claims

1. A domestic sewage treatment system, comprising a regulating tank (2), an anaerobic tank (3) and an aerobic tank (8), characterized in that: The drainage end of the aerobic pool (8) is connected to the MBR biofilm reaction pool (4) and the clean water pool (5) in sequence. Two partition walls are arranged in the regulating pool (2) to divide it into a first small pool (9), a second small pool (10) and a third small pool (11). The first small pool (9) is provided with a first water inlet end (12) and a first drainage end (13) at both ends, and the first drainage end (13) is connected to the anaerobic pool (3) and the aerobic pool (8) in sequence. The second small pool (10) is provided with a second water inlet end (14) and a second drainage end (15) at both ends, and the second drainage end (15) is connected to the aerobic pool (8). The third small pool (11) is provided with a third water inlet end (16) and a third drainage end (17) at both ends, and the third drainage end (17) is connected to the MBR biofilm reaction pool (4).

2. A domestic sewage treatment system according to claim 1, characterized in that: A first water collection tank (18) is provided at the first drainage end (13), a first water pump (19) is provided in the first small tank (9), the first water pump (19) is connected to the first water collection tank (18) via a first drainage pipe (20), and the first water collection tank (18) is connected to the anaerobic tank (3) via a first water supply pipe (21).

3. A domestic sewage treatment system according to claim 2, characterized in that: A second water collection tank (23) is provided at the second drainage end (15), a second water pump (24) is provided in the second small pool (10), the second water pump (24) is connected to the second water collection tank (23) via a second drainage pipe (25), and the second water collection tank (23) is connected to the aerobic pool (8) via a second water supply pipe (26).

4. A domestic sewage treatment system according to claim 3, characterized in that: The third drainage end (17) is provided with a third water collection tank (27), a third water pump (28) is provided in the third small tank (11), the third water pump (28) is connected to the third water collection tank (27) via a third drainage pipe (29), and the third water collection tank (27) is connected to the MBR biofilm reaction tank (4) via a third water supply pipe (30).

5. A domestic sewage treatment system according to claim 4, characterized in that: A water inlet pool (31) is provided at the first water inlet end (12), the second water inlet end (14) and the third water inlet end (16), a water inlet port (32) is provided on a side wall of the water inlet pool (31), and a grille (1) is provided at the water inlet port (32).

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