CN214936349U

CN214936349U - Aerobic reactor

Info

Publication number: CN214936349U
Application number: CN202120555745.XU
Authority: CN
Inventors: 李静
Original assignee: Paques Environmental Technology Shanghai Co ltd
Current assignee: Paques Environmental Technology Shanghai Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-11-30
Anticipated expiration: 2031-03-17

Abstract

The utility model discloses an aerobic reactor, which comprises a tank body, mix liquid gas stripping pipe and mud gas stripping pipe, the internal first baffle and the second baffle of being equipped with of jar, first baffle and second baffle interval arrangement on the direction of height of the jar body, in order to separate into the aeration zone of arranging along the direction of height of the jar body with the inner chamber of the jar body, settling zone and anoxic zone, first baffle is located between aeration zone and the settling zone, the second baffle is located between settling zone and the anoxic zone, the aeration zone is through first intercommunication passageway and settling zone intercommunication, the settling zone passes through second intercommunication passageway and anoxic zone intercommunication, the anoxic zone has the water inlet, the settling zone has the delivery port, be equipped with the aerator in the aeration zone, mix liquid gas stripping pipe's lower extreme and anoxic zone intercommunication and upper end and aeration zone intercommunication, mud gas stripping pipe's upper end and aeration zone intercommunication and lower extreme and anoxic zone intercommunication. The aerobic reactor of the utility model has the advantages of small occupied area, compact structure, low cost and small noise.

Description

Aerobic reactor

Technical Field

The utility model relates to an environmental protection technology field specifically, relates to an aerobic reactor.

Background

In the related art, each treatment unit in the wastewater aerobic treatment process is horizontally arranged, so that the occupied area is large, the number of matched equipment is large, the investment is large, and the maintenance cost is high.

Disclosure of Invention

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the embodiment of the utility model provides an aerobic reactor, this aerobic reactor area is little, compact structure, with low costs and small in noise.

According to the utility model discloses aerobic reactor, include: the device comprises a tank body, wherein a first partition plate and a second partition plate are arranged in the tank body, the first partition plate and the second partition plate are arranged at intervals in the height direction of the tank body so as to divide an inner cavity of the tank body into an aeration zone, a precipitation zone and an anoxic zone which are arranged in the height direction of the tank body, the first partition plate is positioned between the aeration zone and the precipitation zone, the second partition plate is positioned between the precipitation zone and the anoxic zone, the aeration zone is communicated with the precipitation zone through a first communication channel, the precipitation zone is communicated with the anoxic zone through a second communication channel, the anoxic zone is provided with a water inlet, the precipitation zone is provided with a water outlet, and an aerator is arranged in the aeration zone; the mixed liquid gas stripping pipe is provided with a first gas supply port, the first gas supply port is close to the lower end of the mixed liquid gas stripping pipe and used for supplying gas into the mixed liquid gas stripping pipe, the lower end of the mixed liquid gas stripping pipe is communicated with the anoxic zone, and the upper end of the mixed liquid gas stripping pipe is communicated with the aeration zone; the sludge gas stripping pipe is provided with a second gas supply port, the second gas supply port is close to the lower end of the sludge gas stripping pipe, the upper end of the sludge gas stripping pipe is communicated with the aeration zone, and the lower end of the sludge gas stripping pipe is communicated with the anoxic zone.

According to the utility model discloses aerobic reactor, area is little, compact structure, with low costs and small in noise.

In some embodiments, the lower end of the sludge stripper tube is adjacent the bottom of the anoxic zone and the lower end of the mixed liquor stripper tube is adjacent the top of the anoxic zone.

In some embodiments, the upper end of the sludge stripper tube and the upper end of the mixed liquor stripper tube are adjacent the top of the aeration zone.

In some embodiments, the upper end of the sludge stripper tube is bent inward in the radial direction of the tank, and the upper end of the mixed liquor stripper tube is bent inward in the radial direction of the tank.

In some embodiments, the second partition plate is inclined inward and downward along the radial direction, a mud bucket is arranged in the center of the lower surface of the second partition plate, the second communication channel is located in the center of the second partition plate and penetrates through the mud bucket, and the mud bucket is connected with a mud discharge pipe which leads to the outside of the tank body.

In some embodiments, the first communicating channel is provided at the center of the first partition plate.

In some embodiments, the aerobic reactor further comprises a first scraper disposed within the settling zone, the first scraper being adjacent to and spaced apart from the second partition.

In some embodiments, the aerobic reactor further comprises a baffle plate, the baffle plate being disposed in the settling zone.

In some embodiments, the aerobic reactor further comprises a second scraper disposed within the anoxic zone, the second scraper being adjacent to and spaced apart from a bottom wall face of the anoxic zone.

In some embodiments, the aerobic reactor further comprises a driving device arranged outside the tank body, and the driving device is connected with the first scraper and the second scraper.

Drawings

Fig. 1 is a schematic diagram of an aerobic reactor according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of section B-B in the aerobic reactor shown in FIG. 1.

FIG. 3 is a schematic view of section A-A of the aerobic reactor shown in FIG. 1.

Reference numerals:

a tank body 1, an aeration zone 101, a sedimentation zone 102, an anoxic zone 103, a water inlet 104, a water outlet 105,

a first partition plate 2, a second partition plate 3, a first communicating path 4, a second communicating path 5,

a mixed liquid stripper tube 6, a first air supply port 61,

a sludge gas stripping pipe 7, a second gas supply port 71,

the sludge scraper comprises a sludge hopper 8, a sludge discharge pipe 9, a first sludge scraper 10, a reflecting plate 11, a second sludge scraper 12, a driving device 13, a driving shaft 1301, an aerator 14, a water outlet pipe 15, a water inlet pipe 16 and a connecting piece 17.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 3, an aerobic reactor according to an embodiment of the present invention includes a tank 1, a mixed liquid stripper 6, and a sludge stripper 7.

The tank body 1 is internally provided with a first clapboard 2 and a second clapboard 3, and the first clapboard 2 and the second clapboard 3 are arranged at intervals in the height direction of the tank body 1 (the up-down direction shown in figure 1) so as to divide the inner cavity of the tank body 1 into an aeration zone 101, a sedimentation zone 102 and an anoxic zone 103 which are arranged along the height direction of the tank body 1.

The first partition board 2 is positioned between the aeration zone 101 and the sedimentation zone 102, the second partition board 3 is positioned between the sedimentation zone 102 and the anoxic zone 103, the aeration zone 101 is communicated with the sedimentation zone 102 through a first communication channel 4, the sedimentation zone 102 is communicated with the anoxic zone 103 through a second communication channel 5, the anoxic zone 103 is provided with a water inlet 104, the sedimentation zone 102 is provided with a water outlet 105, and an aerator 14 is arranged in the aeration zone 101.

As shown in fig. 1, the aeration zone 101, the settling zone 102 and the anoxic zone 103 are arranged in sequence from top to bottom, and the depth of the aeration zone 101 is greater than the depth of the anoxic zone 103, and the depth of the anoxic zone 103 is greater than the depth of the settling zone 102. Specifically, the outer contour of the aeration zone 101 may be square or circular, and the outer contours of the settling zone 102 and the anoxic zone 103 may be circular. It is to be understood that the outer contours of the aeration zone 101, the settling zone 102 and the anoxic zone 103 are not limited thereto.

The first communicating channel 4 extends vertically in the up-down direction and communicates the aeration zone 101 with the settling zone 102, and the second communicating channel 5 extends vertically in the up-down direction and communicates the settling zone 102 with the anoxic zone 103. The tank body 1 is also provided with a water outlet 105 for communicating the inside of the tank body 1 with the outside, the water outlet 105 is arranged on the outer circumferential wall of the tank body 1, the water outlet 105 is adjacent to the top of the settling zone 102, and the water outlet 105 is connected with a water outlet pipe 15. The bottom of the tank body 1 is provided with a water inlet 104 which is communicated with the inside of the tank body 1 and the outside, and the water inlet 104 is connected with a water inlet pipe 16.

Mixed liquor stripper 6 is provided with a first air supply port 61, first air supply port 61 being adjacent the lower end of mixed liquor stripper 6 for supplying air into mixed liquor stripper 6, the lower end of mixed liquor stripper 6 being in communication with anoxic zone 103 and the upper end of mixed liquor stripper 6 being in communication with aeration zone 101. As shown in fig. 1, a compressed air pipe is connected to the first air supply port 61, and the compressed air pipe is connected to an external compressed air source to supply air into the mixed liquid stripper 6 through the compressed air pipe.

The sludge air stripping pipe 7 is provided with a second air supply port 71, the second air supply port 71 is adjacent to the lower end of the sludge air stripping pipe 7, the upper end of the sludge air stripping pipe 7 is communicated with the aeration zone 101, and the lower end of the sludge air stripping pipe 7 is communicated with the anoxic zone 103. As shown in fig. 1, a compressed air pipe is connected to the second air supply port 71, and the compressed air pipe is connected to an external compressed air source to supply air into the sludge air stripping pipe 7 through the compressed air pipe.

According to the embodiment of the utility model discloses aerobic reactor, aeration zone 101, settling zone 102 and anoxic zone 103 arrange in the upper and lower direction, have reduced equipment area, make the structure compacter to through the degree of depth that increases aeration zone 101, increase dissolved oxygen efficiency, thereby reduce the quantity of aerator 14, reduce equipment cost. Through setting up mixed liquid air stripping pipe 6 and sludge air stripping pipe 7 and replaced mud backwash pump and mixed liquid backwash pump, reduced equipment noise and equipment manufacturing cost to the air stripping pipe can also carry out the preliminary aeration to mixed liquid and mud, improves reaction efficiency, and the air stripping can also play certain stirring effect to the aeration zone, further improves reaction efficiency.

In some embodiments, the lower end of sludge stripper tube 7 is adjacent the bottom of anoxic zone 103 and the lower end of mixed liquor stripper tube 6 is adjacent the top of anoxic zone 103.

According to the utility model discloses aerobic reactor, the lower extreme that will mix liquid gas stripping pipe 6 is close to anoxic zone 103 top setting, improves the extraction efficiency of mixing liquid, with the bottom setting of the lower extreme that mud gas stripping pipe 7 is close to anoxic zone 103, improves the extraction efficiency of mud.

In some embodiments, the upper end of sludge stripper 7 and the upper end of mixed liquor stripper 6 are adjacent the top of aeration zone 101. As shown in fig. 1, the upper end of sludge stripper 7 and the upper end of mixed liquid stripper 6 are positioned substantially flush with each other in the vertical direction.

According to the utility model discloses aerobic reactor, with the top setting that the upper end of mud gas stripping pipe 7 and the upper end of mixing liquid gas stripping pipe 6 are close to aeration zone 101, can increase dissolved oxygen efficiency.

In some embodiments, the upper end of the sludge stripper tube 7 is bent inward in the radial direction of the tank 1, and the upper end of the mixed liquid stripper tube 6 is bent inward in the radial direction of the tank 1. As shown in fig. 1, the upper end of the sludge stripper tube 7 is bent rightward, and the upper end of the mixed liquid stripper tube 6 is bent leftward.

According to the utility model discloses aerobic reactor, the upper end of sludge gas stripping pipe 7 is bent right, mixes the upper end of liquid gas stripping pipe 6 and bends left, thereby can make mud and mixed liquid all spray more accurate entering reaction zone towards jar inboard of body 1, improve reaction efficiency.

In some embodiments, the second partition 3 is inclined inward and downward in the radial direction, a mud bucket 8 is arranged at the center of the lower surface of the second partition 3, the second communication channel 5 is positioned at the center of the second partition 3 and penetrates through the mud bucket 8, and the mud bucket 8 is connected with a mud pipe 9 leading to the outside of the tank 1.

As shown in fig. 1, the first partition plate 2 is arranged substantially horizontally in the radial direction of the tank 1, the second partition plate 3 is inclined downward from the outside of the tank 1 toward the inside, and a hopper 8 is formed at the center of the tank 1, and the size of the upper end opening of the hopper 8 in the radial direction of the tank 1 is larger than the size of the lower end opening of the hopper 8 in the radial direction of the tank 1. The tank body 1 is also provided with a sludge discharge port which is arranged on the peripheral wall of the tank body 1, and a sludge discharge pipe 9 passes through the sludge discharge port and is communicated with the sludge hopper 8 and the outside.

According to the utility model discloses aerobic reactor, through setting up bagger 8, the mud in collection sedimentation zone 102 that can be better can improve the treatment effeciency of reactor with unnecessary mud discharge jar body 1 through mud pipe 9.

In some embodiments, the first communicating channel 4 is provided in the center of the first separator 2.

In some embodiments, the aerobic reactor further comprises a first scraper 10, the first scraper 10 being disposed within the settling zone 102, the first scraper 10 being adjacent to the second partition 3 and spaced apart from the second partition 3. As shown in fig. 1, the first scraper 10 is disposed adjacent to the bottom of the settling zone 102.

According to the utility model discloses aerobic reactor, through setting up first mud scraper 10, improve the mud collection efficiency in sedimentation zone 102, avoid mud deposit on second baffle 3 simultaneously.

In some embodiments, the aerobic reactor further comprises a baffle plate 11, the baffle plate 11 being disposed within the settling zone 102.

Specifically, as shown in fig. 1, the aerobic reactor further includes a connecting member 17, the reflecting plate 11 is disposed right below the outlet of the first communicating channel 4, the reflecting plate 11 is disposed horizontally, the connecting member 17 is disposed between the reflecting plate 11 and the first sludge scraper 10 in an inclined manner, the upper end of the connecting member 17 is connected to the reflecting plate 11, and the lower end of the connecting member 17 is connected to the first sludge scraper 10.

According to the utility model discloses aerobic reactor, through setting up reflecting plate 11, can prevent by the mixed liquid that first connecting channel got off directly flow into within the anoxic zone, prevent to produce the short-term flow from the mixed liquid that the aeration zone got off, reduce the influence to subsiding mud, improve the solid-liquid separation effect. The separated sewage is discharged from the water outlet 105.

In some embodiments, the aerobic reactor further comprises a second scraper 12, the second scraper 12 being disposed within the anoxic zone 103, the second scraper 12 being adjacent to and spaced apart from a bottom wall face of the anoxic zone 103.

As shown in fig. 1, the second scraper 12 is provided at the bottom of the anoxic zone 103. According to the utility model discloses aerobic reactor, through setting up second sludge scraper 12, improve the mud collection efficiency in anoxic zone 103, avoid the sludge deposition in jar body 1 bottom simultaneously.

In some embodiments, the aerobic reactor further comprises a driving device 13 arranged outside the tank 1, and the driving device 13 is connected with the first scraper 10 and the second scraper 12.

Specifically, as shown in fig. 1, the driving device 13 includes a driving shaft 1301 arranged in the tank 1, the driving shaft 1301 is vertically arranged in the tank 1 in the up-down direction, the upper end of the driving shaft 1301 is at least partially located in the aeration zone 101, the reflecting plate 11 is connected to the driving shaft 1301, the upper end of the connecting member 17 is connected to the reflecting plate 11, and the lower end of the connecting member 17 is connected to the first sludge scraper 10.

It should be noted that the reflection plate 11 is connected to the driving shaft 1301, and the connection member 17 is directly connected to the driving shaft 1301, and when the connection member 17 is directly connected to the driving shaft 1301, the connection member 17 is located below the reflection plate 11, and similarly, the second scraper 12 may be connected to the driving shaft 1301 through the connection member 17.

According to the utility model discloses aerobic reactor through establishing at the outside drive arrangement 13 of jar body 1, can simplify the structure in jar body 1, makes the reactor operation more stable, reduces the plant maintenance volume simultaneously.

The aerobic reactor according to some embodiments of the present invention will be described with reference to fig. 1 to 3.

According to the utility model discloses aerobic reactor includes jar body 1, mixes liquid gas stripping pipe 6, sludge gas stripping pipe 7, first scraper 10, reflecting plate 11, second scraper 12 and drive arrangement 13.

The tank body 1 is internally provided with a first clapboard 2 and a second clapboard 3, the first clapboard 2 and the second clapboard 3 are arranged at intervals in the vertical direction to divide the inner cavity of the tank body 1 into an aeration zone 101, a sedimentation zone 102 and an anoxic zone 103 which are arranged in the vertical direction, the first clapboard 2 is positioned between the aeration zone 101 and the sedimentation zone 102, the second clapboard 3 is positioned between the sedimentation zone 102 and the anoxic zone 103, the aeration zone 101 is communicated with the sedimentation zone 102 through a first communicating channel 4, and the sedimentation zone 102 is communicated with the anoxic zone 103 through a second communicating channel 5. The first communicating channel 4 is provided at the center of the first partition plate 2, the second communicating channel 5 is provided at the center of the second partition plate 3, and the first communicating channel 4 and the second communicating channel 5 are concentrically arranged. The anoxic zone 103 is provided with a water inlet 104, the sedimentation zone 102 is provided with a water outlet 105, a plurality of aerators 14 are arranged in the aeration zone 101, and the aerators 14 are uniformly distributed on the upper end surface of the first clapboard 2.

The second clapboard 3 inclines inwards and downwards along the radial direction, a mud bucket 8 is arranged at the center of the lower surface of the second clapboard 3, the second communicating channel 5 is positioned at the center of the second clapboard 3 and penetrates through the mud bucket 8, and the mud bucket 8 is connected with a mud pipe 9 leading to the outside of the tank body 1.

Mixed liquor stripper 6 is provided with a first air supply port 61, first air supply port 61 being adjacent the lower end of mixed liquor stripper 6 for supplying air into mixed liquor stripper 6, the lower end of mixed liquor stripper 6 being in communication with anoxic zone 103 and the upper end of mixed liquor stripper 6 being in communication with aeration zone 101. The first air supply port 61 is connected with a compressed air pipe, the compressed air pipe is connected with an external compressed air source, and air is supplied into the mixed liquid air stripping pipe 6 through the compressed air pipe. The lower end of mixed liquor stripper tube 6 is adjacent the top of anoxic zone 103.

The sludge air stripping pipe 7 is provided with a second air supply port 71, the second air supply port 71 is adjacent to the lower end of the sludge air stripping pipe 7, the upper end of the sludge air stripping pipe 7 is communicated with the aeration zone 101, and the lower end of the sludge air stripping pipe 7 is communicated with the anoxic zone 103. The second air supply port 71 is connected with a compressed air pipe which is connected with an external compressed air source and supplies air to the sludge air stripping pipe 7 through the compressed air pipe. The lower end of the sludge stripping pipe 7 is adjacent to the bottom of the anoxic zone 103.

The upper end of the sludge stripper tube 7 and the upper end of the mixed liquid stripper tube 6 are adjacent to the top of the aeration zone 101, and the upper ends of the sludge stripper tube 7 and the upper end of the mixed liquid stripper tube 6 are substantially flush in position in the up-down direction. The upper end of the sludge gas stripping pipe 7 is bent inwards along the radial direction of the tank body 1, and the upper end of the mixed liquid gas stripping pipe 6 is bent inwards along the radial direction of the tank body 1.

A first scraper 10 is provided within the settling zone 102, the first scraper 10 being adjacent the second partition 3 and spaced from the second partition 3. The reflection plate 11 is provided on the drive shaft 1301, and the reflection plate 11 and the first scraper 10 are connected to the first scraper 10 by a connection member 17.

The second scraper 12 is provided in the anoxic zone 103, and the second scraper 12 is adjacent to and spaced apart from the bottom wall surface of the anoxic zone 103. The driving device 13 is connected to the first scraper 10 and the second scraper 12.

The operation of the aerobic reactor according to the embodiment of the present invention will be described with reference to fig. 1 to 3.

Waste water enters an anoxic zone 103 at the bottom of the tank body 1 through a water inlet pipe 16, the waste water and anoxic sludge in the anoxic zone 103 are mixed and then flow upwards, denitrification reaction occurs in the anoxic zone 103, mixed liquid in the anoxic zone 103 is conveyed into an uppermost aeration zone 101 through a mixed liquid stripping pipe 6, in the aeration zone 101, COD in the waste water can be removed by aerobic activated sludge, ammonia nitrogen is converted into nitrate nitrogen, then, a mud-water mixture in the aeration zone 101 enters a middle sedimentation zone 102 through a first communicating channel 4, solid-liquid separation is performed after the stable flow is reflected by a reflecting plate 11, separated clean water is discharged out of the tank body 1 through a water outlet pipe 15, and sludge mixed liquid precipitated in the sedimentation zone 102 is discharged into the anoxic zone 103 at the lower part through a second communicating channel 5 at the bottom of a mud bucket 8. The excess sludge is discharged out of the tank body 1 through a sludge discharge pipe 9.

The sludge in the anoxic zone 103 is collected by the second sludge scraper 12 and then lifted to the aeration zone 101 through the sludge stripping pipe 7. The mud lifting amount of the mud gas stripping pipe 7 and the mixed liquid lifting amount of the mixed liquid gas stripping pipe 6 are generally larger than the water inflow of the wastewater, and the final mud lifting amount and the final water lifting amount can be adjusted according to the actual production condition and the denitrification efficiency requirement.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. An aerobic reactor, comprising:

the device comprises a tank body, wherein a first partition plate and a second partition plate are arranged in the tank body, the first partition plate and the second partition plate are arranged at intervals in the height direction of the tank body so as to divide an inner cavity of the tank body into an aeration zone, a precipitation zone and an anoxic zone which are arranged in the height direction of the tank body, the first partition plate is positioned between the aeration zone and the precipitation zone, the second partition plate is positioned between the precipitation zone and the anoxic zone, the aeration zone is communicated with the precipitation zone through a first communication channel, the precipitation zone is communicated with the anoxic zone through a second communication channel, the anoxic zone is provided with a water inlet, the precipitation zone is provided with a water outlet, and an aerator is arranged in the aeration zone;

the mixed liquid gas stripping pipe is provided with a first gas supply port, the first gas supply port is close to the lower end of the mixed liquid gas stripping pipe and used for supplying gas into the mixed liquid gas stripping pipe, the lower end of the mixed liquid gas stripping pipe is communicated with the anoxic zone, and the upper end of the mixed liquid gas stripping pipe is communicated with the aeration zone;

the sludge gas stripping pipe is provided with a second gas supply port, the second gas supply port is close to the lower end of the sludge gas stripping pipe, the upper end of the sludge gas stripping pipe is communicated with the aeration zone, and the lower end of the sludge gas stripping pipe is communicated with the anoxic zone.

2. An aerobic reactor according to claim 1 wherein the lower end of the sludge stripper tube is adjacent the bottom of the anoxic zone and the lower end of the mixed liquor stripper tube is adjacent the top of the anoxic zone.

3. An aerobic reactor according to claim 2 wherein the upper ends of the sludge stripper tubes and the upper end of the mixed liquor stripper tubes are adjacent the top of the aeration zone.

4. An aerobic reactor according to claim 3, wherein the upper end of the sludge stripper tube is bent radially inwards of the tank and the upper end of the mixed liquor stripper tube is bent radially inwards of the tank.

5. An aerobic reactor according to claim 1, wherein the second baffle plate slopes downwards and inwards in the radial direction, a mud bucket is arranged in the center of the lower surface of the second baffle plate, the second communication channel is arranged in the center of the second baffle plate and runs through the mud bucket, and the mud bucket is connected with a mud pipe leading to the outside of the tank body.

6. An aerobic reactor according to claim 1, wherein the first communication channel is provided in the centre of the first partition.

7. An aerobic reactor according to any of the claims 1-6, further comprising a first scraper, the first scraper being provided within the settling zone, the first scraper being adjacent to and spaced apart from the second partition.

8. An aerobic reactor according to claim 7, further comprising baffles, wherein the baffles are provided in the settling zone.

9. An aerobic reactor according to claim 7, further comprising a second scraper provided within the anoxic zone, the second scraper being adjacent to and spaced from the bottom wall face of the anoxic zone.

10. An aerobic reactor according to claim 9, further comprising a drive means outside the tank, the drive means being connected to the first and second scrapers.