CN218579774U - Annular multistage AO effluent treatment plant - Google Patents
Annular multistage AO effluent treatment plant Download PDFInfo
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- CN218579774U CN218579774U CN202222779061.5U CN202222779061U CN218579774U CN 218579774 U CN218579774 U CN 218579774U CN 202222779061 U CN202222779061 U CN 202222779061U CN 218579774 U CN218579774 U CN 218579774U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model relates to the technical field of wastewater treatment, a multistage AO effluent treatment plant of annular is disclosed. The utility model discloses a multistage AO effluent treatment plant of annular, include: retort, efflux agitator, efflux aerator and play water component, the retort includes: annular region and settling zone, settling zone are equipped with overflow mouth and blow off pipe, and a plurality of jet stirrers and the setting in turn of jet aerator form a plurality of anoxic zones and aerobic zone in the annular region, and the subassembly that goes out sets up in the retort. The utility model discloses a multistage AO effluent treatment plant of annular, sewage enters into the annular district, in the annular district circulation flow, alternate process anoxic zone, good oxygen district, the switching of circulation between anoxic zone and good oxygen district realizes handling multistage A district and O district of sewage, multistage denitrification promptly handles and nitration promptly, then flow into the settling zone in, through outlet pipe way outflow retort after deposiing, the device design is compact, area has been saved, and the treatment effeciency is high.
Description
Technical Field
The embodiment of the utility model relates to the technical field of wastewater treatment, concretely relates to multistage AO effluent treatment plant of annular.
Background
The waste water treatment generally refers to the treatment of waste water by physical, chemical or biological methods, so as to purify the waste water and reduce pollution, thereby achieving the purposes of waste water recovery and reuse, and fully utilizing and saving water resources.
In the biochemical treatment process, the sewage (wastewater) is usually treated by an AO denitrification treatment (nitrification and denitrification treatment), i.e. a nitrification process of converting ammonia nitrogen in the sewage into nitrate nitrogen by using nitrifying bacteria under an aerobic condition; denitrifying bacteria are utilized to convert nitrate nitrogen in the sewage into gaseous nitrogen under the anoxic condition, so that the aim of purifying the sewage is fulfilled.
But the prior AO denitrification treatment of sewage is separately carried out in two devices, the system occupies large space, the number of matched devices is large, the process is complex, the time consumption is long, and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multistage AO effluent treatment plant of annular to solve the problem among the above-mentioned background art.
The embodiment of the utility model provides an annular multistage AO effluent treatment plant, include: the device comprises a reaction tank, a jet flow stirrer, a jet flow aerator and a water outlet assembly;
a circular partition plate is arranged in the reaction tank, the central axis of the circular partition plate is superposed with the central axis of the reaction tank, the reaction tank is divided into an annular area and a settling area by the circular partition plate, and the annular area is positioned on the outer side of the settling area;
the top end of the settling zone is provided with an overflow port, and the overflow port is connected with a water outlet pipeline;
a drain pipe is arranged at the bottom of the sedimentation zone of the reaction tank;
the bottom end of the annular area of the reaction tank is provided with a water inlet pipeline;
the jet flow stirrer and the jet flow aerator are respectively provided with a plurality of jet flow stirrers, the plurality of jet flow stirrers and the plurality of jet flow aerators are alternately arranged in the annular area, and the jet directions of the jet flow stirrers and the jet flow aerators are the same;
the water outlet assembly is arranged in the reaction tank and is used for enabling the sewage in the annular area to automatically flow into the settling area.
According to the above technical scheme, the utility model discloses a multistage AO effluent treatment plant of annular, through setting up retort, jet agitator, jet aerator and play water component, the retort includes: annular district and settling zone, settling zone are equipped with overflow mouth and blow off pipe, and the annular district is equipped with the inlet channel, and the setting that a plurality of efflux agitator and jet aerator are in turn is in the annular district of retort, and alternate formation anoxic zone and aerobic zone go out the water subassembly setting in the retort. The utility model discloses a multistage AO effluent treatment plant of annular, sewage (waste water) enters into the annular of retort from the water intake pipe and distinguishes in, sewage is distinguished along clockwise or anticlockwise circulation flow in the annular of retort, alternate process anoxic zone (A district), good oxygen district (O district), the switching that sewage made a round trip between A district and O district, carry out denitrification reaction (nitrate nitrogen is transformed into nitrogen gas innoxious emission) in A district, it is nitrate nitrogen to carry out nitration reaction (ammonia nitrogen is transformed into nitrate nitrogen) in O district, the realization is distinguished with O to the multistage A of sewage and is handled, multistage denitrification treatment and nitration promptly, make sewage purification, then flow into the settling zone through the water outlet subassembly in, after deposiing, outlet pipe says out the retort, the device design is compact, the area is saved, and the treatment effeciency is high.
In one possible embodiment, a plurality of the jet agitators and the jet aerators are arranged alternately at equal intervals.
In one possible solution, the water outlet assembly comprises: a water outlet hopper and a water outlet pipe;
the water outlet hopper is arranged in the annular area and positioned at the top end of the annular area, and the small end of the water outlet hopper is arranged downwards;
the water outlet pipe penetrates through the circular partition plate, one end of the water outlet pipe is connected with the lower end of the water outlet hopper, and the other end of the water outlet pipe extends into the settling area.
In one possible solution, the outlet end of the outlet pipe is located at the lower part of the settling zone.
In one possible solution, the water outlet assembly further comprises: an overflow pipe;
the overflow pipe is vertically arranged in the sedimentation area, and a plurality of overflow holes are distributed at the top end of the overflow pipe;
the water outlet pipe is connected with the overflow pipe.
In one possible embodiment, the central axis of the overflow pipe and the central axis of the circular partition are arranged in a manner overlapping one another.
In one possible solution, the bottom of the settling zone is conical, and the sewage drain is connected to the conical outlet of the settling zone.
In one possible solution, the method further comprises: a sludge return pipeline and a sludge return pump;
one end of the sludge return pipeline is connected to the conical section of the settling zone, the other end of the sludge return pipeline is connected with the water inlet pipeline, and the sludge return pump is arranged on the sludge return pipeline.
In one possible embodiment, the method further comprises: a sludge discharge pipeline and a sludge pump;
the sludge discharge pipeline is connected with the sewage discharge pipe, and the sludge pump is arranged on the sludge discharge pipeline and used for pumping out sludge.
Compared with the prior art, the technical scheme of the utility model following beneficial effect has:
1. the sewage circularly flows in the annular area, a circulating pump is not needed, and the cost is saved.
2. A plurality of jet flow stirrers and jet flow aerators are alternately arranged in the annular area to form a multistage A area (anoxic area) and an O area (aerobic area), so that the sewage can be freely switched between the anoxic area and the aerobic area, and the multistage nitrification and denitrification processes are completed.
3. The center of the reaction tank is provided with the settling zone, so that the equipment is compact in design, and the floor area of the equipment is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic front view of an annular multi-stage AO wastewater treatment apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic top view of an annular multistage AO wastewater treatment plant in an embodiment of the present invention.
Reference numbers in the figures:
1. a reaction tank; 11. a circular separator plate; 101. an annular region; 102. a settling zone; 103. an overflow port; 12. a water outlet pipeline; 13. a blow-off pipe; 14. a water inlet pipeline; 21. a jet mixer; 22. a jet aerator; 3. a water outlet assembly; 31. a water outlet hopper; 32. a water outlet pipe; 33. an overflow pipe; 331. an overflow aperture; 41. a sludge return line; 42. a sludge reflux pump; 51. a sludge discharge pipeline; 52. a sludge pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either 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.
The technical solution of the present invention will be described in detail with specific examples. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.
As described in the background of the present application, in the biochemical treatment process, the sewage is usually treated by an AO (nitrification-denitrification) denitrification method, that is, a nitrification process of converting nitrogen-containing substances (including organic nitrogen and inorganic nitrogen) in the sewage into nitrates is completed by nitrifying bacteria under aerobic conditions; denitrifying bacteria are utilized to reduce nitrate in the sewage into gaseous nitrogen under the anoxic condition, so that the aim of purifying the sewage is fulfilled.
The inventor of the application finds that the AO (nitrification-denitrification) denitrification treatment of the sewage is separately carried out in two kinds of equipment at present, the system occupies large space, the number of matched equipment is large, the process is complex, the consumed time is long, and the efficiency is low.
In order to solve the above problems, the inventor of the present application proposes a technical solution of the present application, and specific embodiments are as follows:
fig. 1 is a schematic front view of an annular multi-stage AO wastewater treatment apparatus in an embodiment of the present invention, and fig. 2 is a schematic top view of the annular multi-stage AO wastewater treatment apparatus in an embodiment of the present invention. As shown in fig. 1 and 2, the annular multistage AO wastewater treatment apparatus of the present embodiment includes: a reaction tank 1, a jet flow stirrer 21, a jet flow aerator 22 and a water outlet component 3.
The reaction tank 1 is cylindrical, a circular partition plate 11 is arranged in the cavity of the reaction tank 1, and the central axis of the circular partition plate 11 and the central axis of the reaction tank 1 are overlapped. The circular partition 11 divides the volume of the reaction tank 1 into two mutually independent annular zones 101 and a settling zone 102, the annular zone 101 being located outside the settling zone 102.
The lateral wall of the top end of the sedimentation area 102 of the reaction tank 1 is provided with an overflow port 103, the overflow port 103 of the sedimentation area 102 is connected with the water outlet pipeline 12, and the treated sewage is output to an external sewage recovery mechanism from the water outlet pipeline 12.
The reaction tank 1 is provided with a drain pipe 13 at the bottom of the settling zone 102, sludge in the sewage is deposited at the bottom of the settling zone 102 of the reaction tank 1, and the sludge at the bottom of the settling zone 102 can be cleaned through the drain pipe 13.
The bottom end of the annular area 101 of the reaction tank 1 is provided with a water inlet pipeline 14, and the water inlet pipeline 14 is connected with a sewage source so that sewage enters the annular area 101 of the reaction tank 1.
The number of the jet flow agitators 21 and the number of the jet flow aerators 22 are the same, and a plurality of the jet flow agitators are provided. The plurality of jet agitators 21 and the plurality of jet aerators 22 are alternately arranged in the annular region 101 of the reaction tank 1, are positioned at the lower part of the annular region 101 of the reaction tank 1, and are not in contact with the bottom surface of the reaction tank 1.
The jet flow agitator 21 is not supplied with air, but injects only the chemical, and forms an anoxic zone (zone a) in the annular zone 101 of the reaction tank 1. The jet aerator 22 sprays the medicament and the air simultaneously, an aerobic zone (O zone) is formed in the annular zone 101 of the reaction tank 1, the jet agitator 21 and the jet aerator 22 form a plurality of anoxic zones (A zone) and aerobic zones (O zone) in the annular zone 101, and the anoxic zones (A zone) and the aerobic zones (O zone) are arranged alternately.
The jet stirrers 21 and the jet aerators 22 have the same jet direction, that is, the jet direction is the same as the clockwise direction or the counterclockwise direction, and the water flow and the air flow jetted by the jet stirrers 21 and the jet aerators 22 push the sewage to circularly flow in the annular area 101 of the reaction tank 1 along the clockwise direction or the counterclockwise direction, so that the sewage alternately passes through the anoxic area (area a) and the aerobic area (area O) in the annular area 101, and the sewage is circularly switched between the anoxic area and the aerobic area.
Waste waterBy effecting denitrification in zone A, i.e. NO 3 /NO 2 + (Electron donor-organic) → N 2 +H 2 O + OH-, so that nitrate nitrogen is converted into nitrogen for harmless discharge; by carrying out the nitration reaction in the O zone, i.e. NH 4 +O 2 →NO 2 +H 2 O+2H+；NO 2 +O 2 →NO 3 So that the ammonia nitrogen is converted into nitrate nitrogen, and the multistage A area and the multistage O area of the sewage are treated, namely the multistage denitrification treatment and the multistage nitrification treatment of the sewage are realized, the harmful substances in the sewage are removed, and the sewage is purified.
The water outlet component 3 is arranged in the reaction tank 1, and sewage in the annular area 101 of the reaction tank 1 automatically flows into the sedimentation area 102 of the reaction tank 1 through the water outlet component 3, then enters the water outlet pipeline 12 from the overflow port 103 after being precipitated in the sedimentation area 102, and finally flows out of the reaction tank 1 through the water outlet pipeline 12.
From the above, it can be seen that the annular multi-stage AO wastewater treatment apparatus of the present embodiment, by providing the reaction tank, the jet agitator, the jet aerator and the water outlet assembly, the reaction tank comprises: annular district and settling area, settling area are equipped with overflow mouth and blow off pipe, and the annular district is equipped with water intake pipe, and the setting in turn of a plurality of jet flow agitators and jet aerator is in the annular district of retort, and alternate formation anoxic zone and aerobic zone go out the water subassembly and set up in the retort. The utility model discloses a multistage AO effluent treatment plant of annular, sewage (waste water) enters into the annular of retort from the water intake pipe and distinguishes in, sewage is distinguished along clockwise or anticlockwise circulation flow in the annular of retort, alternate process anoxic zone (A district), good oxygen district (O district), the switching that sewage made a round trip between A district and O district, carry out denitrification reaction (nitrate nitrogen is transformed into nitrogen gas innoxious emission) in A district, it is nitrate nitrogen to carry out nitration reaction (ammonia nitrogen is transformed into nitrate nitrogen) in O district, the realization is distinguished with O to the multistage A of sewage and is handled, multistage denitrification treatment and nitration promptly, make sewage purification, then flow into the settling zone through the water outlet subassembly in, after deposiing, outlet pipe says out the retort, the device design is compact, the area is saved, and the treatment effeciency is high.
Alternatively, as shown in FIG. 2, in the annular multi-stage AO wastewater treatment apparatus of the present embodiment, a plurality of jet agitators 21 and a plurality of jet aerators 22 are alternately arranged at equal intervals in the annular region 101 of the reaction tank 1. In the embodiment, four jet flow stirrers 21 and four jet flow aerators 22 are arranged in the reaction tank, eight reactors are uniformly distributed in an annular shape, and two adjacent reactors are arranged at an interval of 45 degrees.
Further, in the annular multi-stage AO wastewater treatment apparatus of the present embodiment, the effluent unit 3 includes: a water outlet bucket 31 and a water outlet pipe 32.
The water outlet bucket 31 is arranged in the annular area 101 of the reaction tank 1 and is positioned at the top end of the annular area 101, the top surface of the water outlet bucket 31 is lower than the top surface of the annular area 101 of the reaction tank 1, and the small end of the water outlet bucket 31 is arranged downwards.
The water outlet pipe 32 is arranged on the circular partition plate 11 of the reaction tank 1 in a penetrating manner, one end of the water outlet pipe 32 is connected with the lower port of the water outlet hopper 31, and the other end (water outlet end) of the water outlet pipe 32 extends into the settling zone 102 of the reaction tank 1. The sewage in the annular area 101 of the reaction tank 1 can automatically flow into the sedimentation area 102 of the reaction tank 1 through the water outlet hopper 31 and the water outlet pipe 32, and after sedimentation in the sedimentation area 102, the sewage flows out of the reaction tank 1 through the overflow port 103 and the water outlet pipeline 12.
Further, in the annular multi-stage AO wastewater treatment apparatus of this embodiment, the water outlet end of the water outlet pipe 32 extends into the bottom end (lower portion) of the settling zone 102 of the reaction tank 1, so as to prevent the water outlet of the water outlet pipe 32 from impacting the sludge deposited at the bottom of the settling zone 101.
Further, in the present embodiment of the annular multi-stage AO waste water treatment apparatus, the effluent unit 3 further comprises: an overflow pipe 33.
The overflow pipe 33 is vertically arranged in the settling zone 102 of the reaction tank 1, a plurality of overflow holes 331 are distributed at the top end of the overflow pipe 33, and the overflow holes 331 of the overflow pipe 33 are higher than the overflow ports 103 of the settling zone 102.
The outlet end of the outlet pipe 32 extends into the lower part of the settling zone 102 of the reaction tank 1 and is connected with the bottom end of the overflow pipe 33.
In this embodiment, sewage in the annular region enters the overflow pipe through the water outlet hopper and the water outlet pipe, and then flows out through the overflow hole of the overflow pipe, and the sewage falls down along the pipe wall of the overflow pipe, so that the sedimentation region is kept calm, and the sludge deposited in the sedimentation region cannot be impacted.
Further, in the annular multistage AO waste water treatment apparatus of the present embodiment, the central axis of the overflow pipe 33 and the central axis of the circular partition 11 are disposed to coincide with each other, that is, the overflow pipe 33 is disposed at the center of the sedimentation zone 102, so that the sewage in the annular zone 101 uniformly flows into the sedimentation zone 102.
Optionally, in the annular multi-stage AO wastewater treatment apparatus in this embodiment, the bottom of the settling zone 102 of the reaction tank 1 is in a trumpet-shaped cone shape, and the drain pipe 13 is connected to an outlet at the conical bottom of the reaction tank 1, so that sludge deposited in the settling zone 102 can flow out conveniently.
Further, the annular multi-stage AO wastewater treatment apparatus in this embodiment further includes: a sludge return line 41 and a sludge return pump 42.
One end of the sludge return pipeline 41 is connected with the conical section of the settling zone 102 of the reaction tank 1, the other end of the sludge return pipeline 41 is connected with the water inlet pipeline 14 of the reaction tank 1, and the sludge return pump 42 is arranged on the sludge return pipeline 41.
In this embodiment, through the mud backwash pump, in the annular district of retort is taken back to some activated sludge in the sedimentation zone, through activated sludge, the foul smell in the adsorption treatment sewage makes sewage purification more thorough.
Further, the annular multi-stage AO wastewater treatment apparatus in this embodiment further includes: a sludge discharge line 51 and a sludge pump 52.
One end of the sludge discharge pipeline 51 is connected with the sewage discharge pipe 13 of the reaction tank 1, the sludge pump 52 is arranged on the sludge discharge pipeline 51, and the sludge pump can directly suck out the sludge deposited in the settling zone, so that the use is more convenient.
In the present application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first feature or the second feature or indirectly contacting the first feature or the second feature through an intermediate.
Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only 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 lower level than the second feature.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means 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 invention. 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.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (9)
1. An annular multi-stage AO wastewater treatment device, comprising: the device comprises a reaction tank, a jet flow stirrer, a jet flow aerator and a water outlet assembly;
a circular partition plate is arranged in the reaction tank, the central axis of the circular partition plate is superposed with the central axis of the reaction tank, the reaction tank is divided into an annular area and a settling area by the circular partition plate, and the annular area is positioned on the outer side of the settling area;
the top end of the settling zone is provided with an overflow port, and the overflow port is connected with a water outlet pipeline;
the reaction tank is provided with a drain pipe at the bottom of the sedimentation zone;
the bottom end of the annular area of the reaction tank is provided with a water inlet pipeline;
the jet flow stirrer and the jet flow aerator are both provided with a plurality of jet flow stirrers and a plurality of jet flow aerators which are alternately arranged in the annular area, a plurality of anoxic areas and aerobic areas are alternately formed in the annular area, and the jet flow stirrers and the jet flow aerators have the same spraying direction;
the water outlet assembly is arranged in the reaction tank and is used for enabling the wastewater in the annular area to automatically flow into the settling area.
2. The annular multi-stage AO wastewater treatment apparatus of claim 1, wherein a plurality of the jet agitators and the jet aerators are alternately arranged at equal intervals.
3. The annular multi-stage AO wastewater treatment plant of claim 2, characterized in that the effluent assembly comprises: a water outlet hopper and a water outlet pipe;
the water outlet hopper is arranged in the annular area and positioned at the top end of the annular area, and the small end of the water outlet hopper is arranged downwards;
the water outlet pipe penetrates through the circular partition plate, one end of the water outlet pipe is connected with the lower end of the water outlet hopper, and the other end of the water outlet pipe extends into the settling area.
4. The annular multi-stage AO wastewater treatment apparatus of claim 3, wherein the outlet end of the outlet pipe is located at a lower portion of the settling zone.
5. The annular multi-stage AO wastewater treatment apparatus of claim 4, wherein the water outlet assembly further comprises: an overflow pipe;
the overflow pipe is vertically arranged in the sedimentation area, and a plurality of overflow holes are distributed at the top end of the overflow pipe;
the water outlet pipe is connected with the overflow pipe.
6. The annular multi-stage AO wastewater treatment apparatus of claim 5, wherein the central axis of the overflow pipe and the central axis of the circular partition are disposed to coincide with each other.
7. The annular multi-stage AO waste water treatment apparatus of claim 1, wherein the bottom of the settling zone is tapered, and the blowdown pipe is connected to the tapered outlet of the settling zone.
8. The annular multi-stage AO wastewater treatment plant of claim 7, further comprising: a sludge return pipeline and a sludge return pump;
one end of the sludge return pipeline is connected to the conical section of the settling zone, the other end of the sludge return pipeline is connected with the water inlet pipeline, and the sludge return pump is arranged on the sludge return pipeline.
9. The annular multi-stage AO wastewater treatment plant of claim 1, further comprising: a sludge discharge pipeline and a sludge pump;
the sludge discharge pipeline is connected with the sewage discharge pipe, and the sludge pump is arranged on the sludge discharge pipeline and used for pumping out sludge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222779061.5U CN218579774U (en) | 2022-10-20 | 2022-10-20 | Annular multistage AO effluent treatment plant |
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| CN202222779061.5U CN218579774U (en) | 2022-10-20 | 2022-10-20 | Annular multistage AO effluent treatment plant |
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| CN218579774U true CN218579774U (en) | 2023-03-07 |
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