An aerobic sedimentation integrated bioreactor

Abstract

The present invention discloses an aerobic precipitation integrated bioreactor, which includes an aerobic tank and a precipitation area located at the bottom of the aerobic tank; the top of the precipitation area is open, the side wall of the precipitation area is a hollow cavity, and the hollow cavity is a mud-water channel. A mud-water inlet is opened on the outer side wall of the precipitation area, and a water discharge outlet is opened on the inner side wall at the bottom of the precipitation area; it also includes a circulating sludge discharge pipe. The sludge inlet of the circulating sludge discharge pipe extends into the hollow cavity, and the sludge discharge outlet of the circulating sludge discharge pipe is located in the aerobic tank. An air-lift device is provided on the circulating sludge discharge pipe. In the integrated bioreactor of the present invention, a precipitation area is arranged at the bottom of the aerobic tank, and at the same time, the sludge sucked out from the precipitation area by the sludge discharge pipe is discharged back into the aerobic tank through the air-lift device. Compared with the separately arranged aerobic tank and precipitation area in the prior art, the integrated bioreactor of the present invention can effectively increase the concentration and activity of the sludge in the aerobic tank, and no sludge dead angle will be generated. Such an arrangement can accelerate the sedimentation of the mud-water mixture and the mixing of microorganisms, water and oxygen, thereby improving the water treatment effect of the aerobic tank.

Description

Technical Field

[0001] The present invention relates to an aerobic precipitation integrated bioreactor, belonging to the technical field of water treatment. Background Art

[0002] In the existing sewage treatment system, the aerobic tank and the sedimentation area are separately arranged. After the sludge in the aerobic tank undergoes natural sedimentation, it is pumped into the sedimentation area by a sludge discharge pump. After sedimentation and separation of the mud and water, the sludge flows back into the aerobic tank again. In the above setting method, the sludge sedimentation in the aerobic tank adopts the natural sedimentation method. On the one hand, the sedimentation efficiency is low. On the other hand, the sludge concentration in the aerobic tank is low, and there is also the problem of sludge dead corners. Summary of the Invention

[0003] Aiming at the problems of low sedimentation efficiency, low sludge concentration in the aerobic tank and the existence of sludge dead corners when the sludge sedimentation in the aerobic tank of the existing technology is natural sedimentation, the present invention provides an aerobic precipitation integrated bioreactor.

[0004] Technical Solution: The aerobic precipitation integrated bioreactor of the present invention includes an aerobic tank and a sedimentation area located at the bottom of the aerobic tank; the top of the sedimentation area is open, the side wall of the sedimentation area is a hollow cavity, and the hollow cavity is a mud-water channel. A mud-water inlet is opened on the outer side wall of the sedimentation area, and a water discharge outlet is opened on the inner side wall at the bottom of the sedimentation area; it also includes a circulating sludge discharge pipe. The sludge inlet of the circulating sludge discharge pipe extends into the hollow cavity, the sludge discharge port of the circulating sludge discharge pipe is located in the aerobic tank, and an air-lift device is provided on the circulating sludge discharge pipe.

[0005] Among them, the air-lift device includes a blower and an air pipe connected to the blower. The air inlet of the air pipe is connected to the blower, the air outlet end of the air pipe extends into the circulating sludge discharge pipe, and a filter screen is provided at the air outlet of the air pipe.

[0006] Among them, the air outlet end of the air pipe is L-shaped, that is, the air outlet end extending into the circulating sludge discharge pipe is in the shape of an elbow, and the opening of the air outlet end is upward.

[0007] Among them, a valve is provided on the air pipe.

[0008] Among them, it also includes a reflux sludge discharge pipe and a third sludge discharge pipe. The sludge inlet of the reflux sludge discharge pipe extends into the hollow cavity, the sludge discharge port of the reflux sludge discharge pipe extends into the front aerobic tank, and an air-lift device or a sludge pump is provided on the reflux sludge discharge pipe; the sludge inlet of the third sludge discharge pipe extends into the hollow cavity, the sludge discharge port of the third sludge discharge pipe extends into the rear sedimentation tank, and an air-lift device or a sludge pump is provided on the third sludge discharge pipe.

[0009] Among them, an aeration pipe is also provided at the bottom of the aerobic tank. The aeration pipe is connected to an external aeration blower of the aerobic tank, and a plurality of aeration holes are provided on the aeration pipe.

[0010] Among them, the vertical height from the sludge discharge port of the circulating sludge discharge pipe to the bottom of the aerobic tank is not less than the vertical height from the mud-water inlet on the outer wall of the sedimentation area (2) to the bottom of the aerobic tank, so as to form a larger eddy current area.

[0011] Beneficial effects: In the integrated bioreactor of the present invention, a sedimentation area is arranged at the bottom of the aerobic tank. At the same time, the sludge sucked out from the sedimentation area by the sludge discharge pipe is discharged back into the aerobic tank through the air-lift device. Compared with the separately arranged aerobic tank and sedimentation area in the prior art, the integrated bioreactor of the present invention can effectively increase the concentration and activity of the sludge in the aerobic tank, and no sludge dead angle will be generated. Such a setting can accelerate the sedimentation of the mud-water mixture and the mixing of microorganisms, water and oxygen, thereby improving the water treatment effect of the aerobic tank. Description of the Drawings

[0012] Figure 1 It is the structural schematic diagram of the aerobic sedimentation integrated bioreactor of the present invention;

[0013] Figure 2 It is the connection schematic diagram of the aerobic sedimentation integrated bioreactor of the present invention with the front-end aerobic tank and the rear-end sludge sedimentation area through the reflux sludge discharge pipe and the third sludge discharge pipe respectively. Detailed Embodiment

[0014] The technical solution of the present invention will be further described below with reference to the drawings.

[0015] As Figure 1 shown, the aerobic sedimentation integrated bioreactor of the present invention includes an aerobic tank 1 and a sedimentation area 2 located at the bottom of the aerobic tank 1; the top of the sedimentation area 2 is open, the sedimentation area 2 is in a quadrangular pyramid shape, and the side wall of the sedimentation area 2 is a hollow cavity 3, that is, the inner and outer side walls of the sedimentation area 2 enclose a hollow structure, and the hollow cavity 3 is a mud-water channel. A mud-water inlet 4 is opened on the outer side wall of the sedimentation area 2, and a water discharge port 5 is opened on the inner side wall at the bottom of the sedimentation area 2; the aerobic sedimentation integrated bioreactor of the present invention further includes a circulating sludge discharge pipe 6, the mud inlet of the circulating sludge discharge pipe 6 extends into the hollow cavity 3, the sludge discharge port of the circulating sludge discharge pipe 6 is located in the aerobic tank 1, and an air-lift device 15 is provided on the circulating sludge discharge pipe 6; the sludge discharge port of the sludge discharge pipe 6 is slightly higher than the mud-water inlet 4 opened on the outer side wall of the sedimentation area 2. The mud-water mixture in the aerobic tank 1 flows into the hollow cavity 3 from the mud-water inlet 4. Under the action of the air-lift device 15, a negative pressure is formed at the lower end of the circulating sludge discharge pipe 6, so as to realize the suction of the sludge at the bottom of the hollow cavity 3. The circulating sludge discharge pipe 6 discharges the sucked sludge back into the aerobic tank 1, increasing the concentration of the activated sludge in the aerobic tank 1. When sucking the sludge, water is discharged from the water discharge port 5 out of the hollow cavity 3. During the negative pressure suction process, the mud-water mixture can enter the hollow cavity 3 more quickly, thereby accelerating the sedimentation of the mud-water mixture (sludge).

[0016] Among them, the air stripping device 15 includes a blower 7 and an air pipe 8 connected to the blower 7. A valve 9 is provided on the air pipe 8. The air inlet of the air pipe 8 is connected to the blower 7, and the air outlet end 10 of the air pipe 8 extends into the circulating sludge discharge pipe 6. A filter screen is provided at the air outlet of the air pipe 8, and the filter screen can prevent the sludge in the circulating sludge discharge pipe 6 from blocking the air pipe 8. The air outlet end 10 of the air pipe 8 is L-shaped, and the opening of the air outlet end 10 is upward. The air pipe 8 blows air upward, so that a negative pressure is formed at the lower end of the circulating sludge discharge pipe 6, thereby continuously sucking the sludge in the hollow cavity 3, and then accelerating the rapid flow of the mud and water in the aerobic tank 1 from the mud and water inlet 4 into the hollow cavity 3. Thus, without a stirring device, the sludge in the aerobic tank 1 can be continuously disturbed to form a swirl, which can not only improve the concentration and activity of the sludge in the aerobic tank 1, but also accelerate the mixing of microorganisms, water and oxygen, and further improve the water treatment effect of the aerobic tank 1.

[0017] An air diffuser pipe 11 is also provided at the bottom of the aerobic tank 1. The air diffuser pipe 11 is connected to an external aeration blower of the aerobic tank 1, and a plurality of air diffuser holes are provided on the air diffuser pipe 11.

[0018] As Figure 2 shown, the aerobic sedimentation integrated bioreactor of the present invention further includes a reflux sludge discharge pipe 13 and a third sludge discharge pipe 14. The sludge inlet of the reflux sludge discharge pipe 13 extends into the hollow cavity 3, and the sludge discharge port of the reflux sludge discharge pipe 13 extends into the front aerobic tank 12. An air stripping device 15 or a sludge pump is provided on the reflux sludge discharge pipe 13. The sludge inlet of the third sludge discharge pipe 14 extends into the hollow cavity 3, and the sludge discharge port of the third sludge discharge pipe 14 extends into the rear sludge sedimentation tank. An air stripping device 15 or a sludge pump is provided on the third sludge discharge pipe 14.

Claims

1. An aerobic precipitation integrated bioreactor, characterized in that: It includes an aerobic tank (1) and a sedimentation area (2) located at the bottom of the aerobic tank (1); the top of the sedimentation area (2) is open, the side wall of the sedimentation area (2) is a hollow cavity (3), the hollow cavity (3) is a mud-water channel, a mud-water inlet (4) is opened on the outer side wall of the sedimentation area (2), and a water discharge outlet (5) is opened on the inner side wall at the bottom of the sedimentation area (2); it further includes a circulating sludge discharge pipe (6), the sludge inlet of the circulating sludge discharge pipe (6) extends into the hollow cavity (3), the sludge discharge port of the circulating sludge discharge pipe (6) is located in the aerobic tank (1), and an air-lift device (15) is provided on the circulating sludge discharge pipe (6); the air-lift device (15) includes a blower (7) and an air pipe (8) connected to the blower (7), the air inlet of the air pipe (8) is connected to the blower (7), the outlet end (10) of the air pipe (8) extends into the circulating sludge discharge pipe (6), the outlet end (10) of the air pipe (8) is L-shaped, and the opening of the outlet end (10) is upward; the vertical height from the sludge discharge port of the circulating sludge discharge pipe (6) to the bottom of the aerobic tank is not lower than the vertical height from the mud-water inlet (4) on the outer side wall of the sedimentation area (2) to the bottom of the aerobic tank; The mud-water mixture in the aerobic tank (1) flows into the hollow cavity (3) from the mud-water inlet (4), and under the action of the air-lift device (15), a negative pressure is formed at the lower end of the circulating sludge discharge pipe (6), so as to realize the suction of the sludge at the bottom of the hollow cavity (3), and the circulating sludge discharge pipe (6) discharges the sucked sludge into the aerobic tank (1) again; when sucking sludge, water is discharged from the water discharge outlet (5) out of the hollow cavity (3), and during the negative pressure suction process, it can accelerate the mud-water mixture to enter the hollow cavity (3) more quickly, thereby accelerating the sedimentation of sludge; it further includes a reflux sludge discharge pipe (13) and a third sludge discharge pipe (14), the sludge inlet of the reflux sludge discharge pipe (13) extends into the hollow cavity (3), the sludge discharge port of the reflux sludge discharge pipe (13) extends into the front aerobic tank (12), and an air-lift device (15) or a sludge pump is provided on the reflux sludge discharge pipe (13); the sludge inlet of the third sludge discharge pipe (14) extends into the hollow cavity (3), the sludge discharge port of the third sludge discharge pipe (14) extends into the rear sludge sedimentation tank, and an air-lift device (15) or a sludge pump is provided on the third sludge discharge pipe (14).

2. The aerobic sedimentation integrated bioreactor according to claim 1, characterized in that: A filter screen is provided at the air outlet of the air pipe (8).

3. The aerobic sedimentation integrated bioreactor according to claim 2, characterized in that: A valve (9) is provided on the air pipe (8).

4. The aerobic precipitation integrated bioreactor according to claim 1, characterized in that: An aeration pipe (11) is further provided at the bottom of the aerobic tank (1), the aeration pipe (11) is connected to an external aeration blower of the aerobic tank (1), and a plurality of aeration holes are provided on the aeration pipe (11).

Images