CN116675343A - AAO sewage treatment plant based on anaerobic ammonia oxidation - Google Patents
AAO sewage treatment plant based on anaerobic ammonia oxidation Download PDFInfo
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- CN116675343A CN116675343A CN202310841117.1A CN202310841117A CN116675343A CN 116675343 A CN116675343 A CN 116675343A CN 202310841117 A CN202310841117 A CN 202310841117A CN 116675343 A CN116675343 A CN 116675343A
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- reaction chamber
- anaerobic
- sewage treatment
- ammonia oxidation
- biological
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- 239000010865 sewage Substances 0.000 title claims abstract description 56
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims description 42
- 229910021529 ammonia Inorganic materials 0.000 title claims description 21
- 238000007254 oxidation reaction Methods 0.000 title claims description 21
- 230000003647 oxidation Effects 0.000 title claims description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 116
- 238000004062 sedimentation Methods 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000007790 scraping Methods 0.000 claims description 25
- 239000010802 sludge Substances 0.000 claims description 24
- 238000005192 partition Methods 0.000 claims description 23
- 239000012528 membrane Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 9
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 230000009471 action Effects 0.000 abstract description 11
- 241001148471 unidentified anaerobic bacterium Species 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000010992 reflux Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241001453382 Nitrosomonadales Species 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000032770 biofilm formation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention provides an AAO sewage treatment device based on anaerobic ammoxidation, which comprises a treatment box, wherein the inner part of the treatment box is provided with an anaerobic reaction chamber, an anoxic reaction chamber, an aerobic reaction chamber and a sedimentation chamber, two pneumatic stirrers are arranged at the centers of the bottom walls of the anaerobic reaction chamber, the anoxic reaction chamber and the aerobic reaction chamber, a distance-adjustable biological film hanging frame is arranged in each of the anaerobic reaction chamber and the anoxic reaction chamber, and the distance-adjustable biological film hanging frame comprises a driving device for realizing contraction from two ends of a fork type telescopic frame to the center. The pneumatic stirrers are arranged at the bottom of the reaction chamber, so that the installation of biological hanging films is not affected; the biological film hanging rack with adjustable space is closed towards the middle when the pneumatic stirrer runs, and turbid sewage can be fully contacted with anaerobic bacteria on the biological film hanging rack during stirring, so that the sewage treatment effect is effectively improved; biological film hanging can be mutually far away under the action of the driving unit under the non-running state of the pneumatic stirrer, so that the sewage treatment effect is ensured.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to an AAO sewage treatment device based on anaerobic ammonia oxidation.
Background
Anaerobic ammonia oxidation is a novel biological denitrification technology, nitrite is used as an electron acceptor by anaerobic ammonia oxidation bacteria under anaerobic conditions, ammonia nitrogen is oxidized into nitrogen in a biological reaction process, and the anaerobic ammonia oxidation technology is effectively applied to the field of sewage treatment at present. The anaerobic ammonia oxidation technology and the AAO sewage treatment technology are combined, so that not only is the sewage effectively treated, but also the running cost of the sewage treatment technology is effectively reduced compared with that of the traditional AAO sewage treatment technology.
The invention patent with application number 2020108884561 discloses an anaerobic ammonia oxidation-based AAO process modification method for urban sewage treatment plants, and the reaction device disclosed by the invention has good denitrification performance, but has some unreasonable design. The reaction device is provided with the stirrers in the anaerobic reactor, the anoxic reactor and the aerobic reactor respectively, so that the running cost of equipment is increased, the existence of the more important stirrers can not enable the biofilm to be arranged in the anaerobic reactor and the anoxic reactor, and the sewage treatment effect is reduced.
Disclosure of Invention
The invention aims to provide an AAO sewage treatment device based on anaerobic ammonia oxidation, which solves the defect that a stirrer and a biological film in the existing AAO technology coupling anaerobic ammonia oxidation reaction device cannot be designed at the same time.
According to one object of the invention, the AAO sewage treatment device based on anaerobic ammoxidation comprises a treatment box and a control cabinet, wherein the inside of the treatment box is sequentially divided into an anaerobic reaction chamber, an anoxic reaction chamber, an aerobic reaction chamber and a sedimentation chamber from left to right by a plurality of partition boards, a first overflow port, a second overflow port and an overflow pipe are respectively arranged on the partition boards from left to right, a water inlet pipe is arranged on the outer side wall of the anaerobic reaction chamber, a clear water discharge pipe is arranged on the outer side wall of the sedimentation chamber, two pneumatic stirrers are respectively arranged in the centers of the bottom walls of the anaerobic reaction chamber, the anoxic reaction chamber and the aerobic reaction chamber in series in sequence through air pipes, an air compressor is arranged on the outer side surface of the treatment box, the air compressor is connected with the first pneumatic stirrer in the anaerobic reaction chamber, and an aeration head is arranged on the air pipe positioned in the aerobic reaction chamber;
the anaerobic reaction chamber with adjustable distance biological membrane stores pylon all is provided with in the anoxic reaction chamber, the adjustable distance biological membrane stores pylon is including setting up anaerobic reaction chamber or horizontal spout on the anoxic reaction chamber both sides wall, two be provided with two fork expansion brackets that align to set up between the horizontal spout, two every central intersection position department of fork expansion bracket all is provided with the horizontal pole, the both ends of horizontal pole all are provided with and stretch into slider in the horizontal spout, every equal interval is provided with a plurality of biological hanging membranes on the horizontal pole, the adjustable distance biological membrane stores pylon is still including realizing the drive arrangement that the fork expansion bracket both ends shrink to central department.
Further, the driving device comprises screw nuts connected to the cross bars at the foremost end and the rearmost end, two screw nuts are connected with two-way screw rods in a threaded mode, and one end of each two-way screw rod is connected with a screw rod motor.
Further, the pneumatic stirrer comprises a support and a disc shell, wherein the disc shell is connected with the upper end of the support, a rotating shaft extending into the support is concentrically connected in the disc shell in a rotating mode, an air vane is arranged on the rotating shaft inside the disc shell, the lower end of the rotating shaft is connected with a stirring blade located in the support, and two tangential pipes connected with the air pipe are connected to the circumferential surface of the disc shell.
Further, a sealing bearing matched with the rotating shaft is arranged at the joint of the disc shell and the bracket.
Further, the air outlet end of the air compressor is connected with a three-way valve, and the air compressor is respectively connected with the air pipes in the anaerobic reaction chamber and the aerobic reaction chamber through the three-way valve.
Further, a biological mud interception mechanism is arranged on the partition plate at the second overflow port, the biological mud interception mechanism comprises a filter cover connected with the partition plate, the second overflow port is communicated with the filter cover, and a filter hole is formed in the lower end of the filter cover.
Further, the upper and lower ends of the filter cover are respectively provided with a belt roller, one end of each belt roller positioned at the upper end is connected with a driving motor, a mud scraping belt is arranged between the two belt rollers, and a plurality of mud scraping plates are connected to the outer side surfaces of the mud scraping belts at equal intervals.
Further, a sludge reflux port is formed in the partition plate above the second overflow port, a mud return plate is obliquely inserted in the sludge reflux port, a pressing projection is arranged at the end part of the mud return plate, a spring is arranged between the pressing projection and the partition plate, and a cam acting with the pressing projection is arranged on a roller shaft of the belt roller at the upper end.
Further, a sedimentation bucket is arranged in the sedimentation chamber, the overflow pipe extends into an opening at the upper end of the sedimentation bucket, and the lower end of the sedimentation bucket is connected with a sludge auger conveyor extending out of the treatment box.
Further, the anaerobic reaction chamber, the anoxic reaction chamber and the aerobic reaction chamber are respectively provided with a pH value on-line monitor and a temperature detection control device.
According to the technical scheme, the pneumatic stirrers are arranged at the bottom of the reaction chamber, so that the installation of biological hanging membranes in the anaerobic reaction chamber and the anoxic reaction chamber is not influenced; the biological film hanging rack with adjustable space is closed towards the middle when the pneumatic stirrer runs, and turbid sewage can be fully contacted with anaerobic bacteria on the biological film hanging rack during stirring, so that the sewage treatment effect is effectively improved; under the non-operation state of the pneumatic stirrer, a plurality of biological hanging films can be mutually far away under the action of the driving unit, and the whole anaerobic reaction chamber or the anoxic reaction chamber is fully distributed, so that the sewage treatment effect of the biological hanging films on each position in the treatment chamber is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a front perspective structure of the present invention;
FIG. 2 is a schematic view of the rear perspective structure of the present invention;
FIG. 3 is a schematic view showing the structure of the first state inside the treatment tank according to the present invention;
FIG. 4 is a schematic view showing the structure of the treatment tank in the second state of the invention;
FIG. 5 is a schematic top plan view of the interior of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic perspective view of a distance-adjustable biofilm hanger according to the present invention;
FIG. 7 is a schematic perspective view of a pneumatic agitator according to the present invention;
FIG. 8 is a schematic perspective sectional structure of a pneumatic agitator according to the present invention;
FIG. 9 is a schematic perspective view of a biological sludge retention mechanism according to the present invention.
In the figure: 1. a treatment box; 101. an anaerobic reaction chamber; 102. an anoxic reaction chamber; 103. an aerobic reaction chamber; 104. a precipitation chamber; 105. a water inlet pipe; 106. a clear water discharge pipe;
2. a control cabinet; 3. an air compressor; 4. a first separator; 401. a first overflow port;
5. a second separator; 501. a second overflow port; 502. a sludge return port;
6. a third separator; 601. an overflow pipe;
7. a pneumatic stirrer; 701. a bracket; 702. a disc housing; 703. a wire cutting tube; 704. a rotating shaft; 705. sealing the bearing; 706. an air vane; 707. stirring the leaves;
8. a first air tube; 9. a second air pipe; 10. a third air pipe; 11. a three-way valve; 12. a first air inlet pipe; 13. a second air inlet pipe; 14. an aeration head; 15. distance-adjustable biological film hanging rack; 151. a horizontal chute; 152. fork type expansion bracket; 153. a cross bar; 154. a slide block; 155. a screw nut; 156. a two-way screw rod; 157. a screw motor; 158. biofilm formation;
16. a sedimentation bucket; 17. a biological mud interception mechanism; 171. a filter cover; 172. a belt roller; 173. a mud scraping belt; 174. a mud scraping plate; 175. a mud returning plate; 176. pressing the protruding block; 177. a spring; 178. a driving motor; 179. a cam;
18. sludge auger conveyor.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in fig. 1 to 4, an anaerobic ammonia oxidation-based AAO sewage treatment device comprises a treatment tank 1, a control cabinet 2 and an air compressor 3. A first partition plate 4, a second partition plate 5 and a third partition plate 6 are sequentially arranged in the treatment box 1 from left to right, and the inside of the treatment box 1 is sequentially divided into an anaerobic reaction chamber 101, an anoxic reaction chamber 102, an aerobic reaction chamber 103 and a settling chamber 104 from left to right by the first partition plate 4, the second partition plate 5 and the third partition plate 6. The anaerobic reaction chamber 101, the anoxic reaction chamber 102, and the aerobic reaction chamber 103 are provided with pH on-line monitors and temperature detection control devices, which are all of the prior art, and are not shown in this embodiment.
The water inlet pipe 105 is arranged on the outer side wall of the anaerobic reaction chamber 101, the first overflow port 401 is arranged on the first partition board 4, the second overflow port 501 is arranged on the second partition board 5, the row of overflow pipes 601 is arranged on the third partition board 6, and the horizontal heights of the water inlet pipe 105, the first overflow port 401, the second overflow port 501 and the overflow pipes 601 are gradually reduced. In the sewage treatment process, sewage enters the anaerobic reaction chamber 101 from the water inlet pipe 105, then enters the anoxic reaction chamber 102 through the first overflow port 401, so that the sewage is denitrified by anaerobic ammonia oxidizing bacteria and denitrifying bacteria in the anaerobic reaction chamber 101 and the anoxic reaction chamber 102, the denitrified sewage enters the aerobic reaction chamber 103 again, the aerobic bacteria are utilized to carry out dephosphorization treatment on the sewage under the action of aeration, finally the treated sewage enters the sedimentation chamber 104 through the overflow pipe 601 to be sedimentated, and the sedimentated clear water is directly discharged.
As shown in fig. 3 and 5, two pneumatic agitators 7 are provided at the centers of the bottom walls of the anaerobic reaction chamber 101, the anoxic reaction chamber 102 and the aerobic reaction chamber 103, and a first air pipe 8 is connected between the two pneumatic agitators 7 in the anaerobic reaction chamber 101, the anoxic reaction chamber 102 and the aerobic reaction chamber 103, a second air pipe 9 is connected between the two pneumatic agitators 7 in the anaerobic reaction chamber 101 and the anoxic reaction chamber 102, and a third air pipe 10 is connected between the two pneumatic agitators 7 in the anoxic reaction chamber 102 and the aerobic reaction chamber 103. The air outlet end of the air compressor 3 is connected with a three-way valve 11, the three-way valve 11 is connected with a first air inlet pipe 12 and a second air inlet pipe 13, the end part of the first air inlet pipe 12 is connected with the first pneumatic stirrer 7 in the anaerobic reaction chamber 101, the second air inlet pipe 13 is connected with a third air pipe 10 in the aerobic reaction chamber 103, and a plurality of aeration heads 14 are arranged on the first air pipe 8 of the aerobic reaction chamber 103. Through the above structural design, when the anaerobic reaction chamber 101 and the anoxic reaction chamber 102 are required to be stirred to improve the sewage treatment efficiency, the first air inlet pipe 12 is connected by controlling the three-way valve 11, then the air compressor 3 is started to enable compressed gas to sequentially enter the pneumatic stirrer 7 in the anaerobic reaction chamber 101, the anoxic reaction chamber 102 and the aerobic reaction chamber 103, sewage in the treatment process is stirred by utilizing the action of the pneumatic stirrer 7, and finally compressed air is discharged from the aeration head 14 in the aerobic reaction chamber 103, so that the aeration effect is realized.
As shown in fig. 7 and 8, the pneumatic agitator 7 includes a bracket 701 and a disk housing 702, the disk housing 702 is fixedly installed at an upper end of the bracket 701, and two tangential pipes 703 are connected to a circumferential surface of the disk housing 702 so that compressed air fed in the air pipe can be introduced into or discharged from the disk housing 702 in a tangential direction. A rotating shaft 704 is concentrically rotatably connected in the disc housing 702, and a sealing bearing 705 adapted to the rotating shaft 704 is provided at the connection of the bracket 701 and the disc housing 702, an air vane 706 is provided on the rotating shaft 704 located inside the disc housing 702, and a plurality of stirring vanes 707 are provided at the lower end of the rotating shaft 704 protruding from the disc housing 702. The structural design of the pneumatic stirrer 7 can use the introduced high-pressure gas as a power source to enable the high-pressure gas to act on the gas vane 706 so as to enable the rotating shaft 704 to rotate, and then the stirring blade 707 at the lower end is used for stirring sewage in the treatment process in the rotating process of the rotating shaft 704, so that the sewage treatment efficiency is improved.
As shown in figures 3 and 6 of the drawings,
the anaerobic reaction chamber 101 and the anoxic reaction chamber 102 are provided with a distance-adjustable biological film hanging frame 15, the distance-adjustable biological film hanging frame 15 comprises horizontal sliding grooves 151 arranged at the upper ends of two side surfaces of the anaerobic reaction chamber 101 or the anoxic reaction chamber 102, two fork-type telescopic frames 152 aligned left and right are arranged between the two horizontal sliding grooves 151, a cross rod 153 is arranged at each center crossing position of the two fork-type telescopic frames 152, and two end parts of each cross rod 153 are provided with sliding blocks 154 matched with the horizontal sliding grooves 151. The lead screw nuts 155 are fixedly connected to both the foremost and rearmost cross bars 153, and the two lead screw nuts 155 are on the same line. Then, a bidirectional screw rod 156 is connected between the two screw rod nuts 155 in a threaded manner, the spiral directions of the two ends of the bidirectional screw rod 156 are opposite, and a screw rod motor 157 connected with the bidirectional screw rod 156 is arranged on the outer side surface of the processing box 1. Finally, a plurality of biofilm 158 are provided on each of the cross bars 153 at intervals in the left-right direction thereof. The structural design of the adjustable middle distance biofilm hanger 15 in the embodiment enables the screw motor 157 to be started before the operation process of the pneumatic stirrer 7, and all the cross rods 153 are closed towards the center under the action of the fork type telescopic frame 152 by utilizing the transmission action between the bidirectional screw rod 156 and the screw rod nut 155. When all the cross rods 153 are close to each other to the nearest distance, the biological hanging membranes 158 on the cross rods 153 are close together and are positioned right above the pneumatic stirrer 7, and at the moment, the contact effect of the sewage and anaerobic ammonia oxidizing bacteria and nitrifying bacteria on the biological hanging membranes can be greatly improved by combining the stirring effect of the pneumatic stirrer 7 on the sewage at the center, so that the sewage treatment efficiency of anaerobic bacteria in the anaerobic reaction chamber 101 and the anoxic reaction chamber 102 is optimal. When the anaerobic reaction chamber 101 and the anoxic reaction chamber 102 are in normal sewage treatment, the screw motor 157 is reversely started, so that all the cross rods 153 move away from each other, and the biological film 158 on the cross rods 153 is distributed over the whole anaerobic reaction chamber 101 or the anoxic reaction chamber 102.
As shown in fig. 3 and 4, a sedimentation bucket 16 is arranged in the sedimentation chamber 104, a row of overflow pipes 601 on the third partition plate 6 extend into an upper end opening of the sedimentation bucket 16, then a sludge auger conveyor 18 is connected to the lower end of the sedimentation bucket 16, a discharging end of the sludge auger conveyor 18 extends out of the rear side surface of the sedimentation chamber 104, and a clear water discharge pipe 106 is arranged at the lower end of the sedimentation chamber 104. The treated liquid is sent to the sedimentation bucket 16 for sedimentation through the overflow pipe 601, the clean water after sedimentation flows down from the upper end of the sedimentation bucket 16 and is discharged out of the whole treatment tank 1 through the clean water discharge pipe 106, and the sludge auger conveyor 18 is started once to timely send out the sedimented sludge whenever the sludge in the sedimentation bucket 16 reaches a certain amount.
A sludge interception mechanism is not arranged between the anoxic reactor and the aerobic reactor in the existing sewage treatment device, so that a reflux pump is required to be frequently started in the operation process to return the mixed liquor in the aerobic reactor to the anoxic reactor so as to ensure the stable maintenance of the bacterial amount in the anoxic reactor, the oxygen concentration in the mixed liquor is higher, the oxygen content in the internal reaction liquor in the anoxic reactor is increased due to the frequent reflux action of the mixed liquor, and the anaerobic bacteria in the anoxic reactor can not continuously maintain the efficient treatment efficiency after each reflux.
As shown in fig. 3, 4 and 9, a biological mud interception mechanism 17 is arranged at the second overflow port 501 on the second partition board 5, the biological mud interception mechanism 17 comprises a filter cover 171 arranged on the right side of the second overflow port 501, and a plurality of filter holes are arranged at the lower end of the filter cover 171, so that sewage flowing into the aerobic reaction chamber 103 from the second overflow port 501 is filtered through the filter holes, and the biological mud after filtration is intercepted at the lower end of the filter cover 171.
The upper and lower both ends at filter cover 171 all are provided with belt roller 172, are provided with the mud scraping belt 173 between two belt rollers 172, then are connected with a plurality of mud scraping plates 174 at equidistant intervals in the lateral surface of mud scraping belt 173 to also seted up the filtration pore on the mud scraping plate 174 makes in mud scraping process with moisture filtration.
A sludge return port 502 is provided above the second overflow port 501, and the sludge return port 502 is aligned with the upper end of the filter housing 171. A mud return port 502 is obliquely inserted with a mud return plate 175, a pressing projection 176 is provided at an end of the mud return plate 175, and then a spring 177 is connected between the pressing projection 176 and the second separator 5. The biological mud interception mechanism 17 further comprises a driving motor 178 arranged on the outer side surface of the treatment box 1, a motor shaft of the driving motor 178 is connected with the belt roller 172 at the upper end, and a cam 179 which acts with the pressing convex block 176 is arranged on a roller shaft of the belt roller 172.
The invention makes the sewage flowing out of the second overflow port 501 enter the lower end of the filter cover 171 through the design of the biological mud interception mechanism 17, and intercepts the biological mud in the sewage through the filter holes at the lower end of the filter cover 171. When the biological mud trapped at the lower end of the filter cover 171 reaches a certain amount, the filter holes are blocked, at the moment, the driving motor 178 is started to drive the mud scraping belt 173 to start transmission, and then the mud scraping plate 174 is driven to move under the action of the mud scraping belt 173, so that the biological mud trapped at the lower end of the filter cover 171 is scraped. When the sludge scraping plate 174 scraped with the biological sludge moves over the top end of the sludge scraping belt 173, the non-convex portion of the cam 179 acts with the pressing projection 176, and the upper end of the sludge returning plate 175 is made to extend into the upper end of the filter cover 171 under the action of the spring 177, so that the biological sludge falling down after overturning is received, and then the biological sludge falls into the anoxic reaction chamber 102 through the sludge return port 502. Then, under the continuous rotation of the driving motor 178, the protruding part of the cam 179 presses the pressing protruding block 176, so that the upper end of the mud returning plate 175 moves leftwards and downwards, thereby preventing the movement process of the mud scraping belt 173, and ensuring the normal operation of the mud scraping belt 173.
The invention adopts the pneumatic stirrer with special design in the anaerobic reaction chamber, the anoxic reaction chamber and the aerobic reaction chamber to realize the stirring of sewage, and the pneumatic stirrer is arranged at the bottom of the reaction chamber, so that the installation of biological hanging films in the anaerobic reaction chamber and the anoxic reaction chamber is not influenced; in addition, the pneumatic stirrers in each reaction chamber are sequentially connected in series by the air pipes, and the operation of all the pneumatic stirrers can be simultaneously realized only by utilizing the compressed gas generated by the air compressor, so that the problem of high energy consumption in the operation of a plurality of vertical stirrers in the prior art is effectively reduced, and the final compressed gas can be discharged from the aeration head to realize the aeration effect on the aerobic reaction chamber, so that the whole AAO sewage treatment device has lower operation cost.
The space-adjustable biological film hanging frame with a special structure is designed on the basis of arranging the pneumatic stirrer, when the pneumatic stirrer operates, biological films can be close to the middle part until all biological films are positioned right above the pneumatic stirrer, and turbid sewage can be fully contacted with anaerobic bacteria on the biological films during stirring, so that the sewage treatment effect is effectively improved; in addition, under the non-running state of the pneumatic stirrer, the biological hanging membranes can be mutually far away under the action of the driving unit, so that the whole anaerobic reaction chamber or the anoxic reaction chamber is fully covered by the biological hanging membranes, and the sewage treatment effect of the biological hanging membranes on each position in the treatment chamber is ensured.
The biological mud interception mechanism is designed to filter sewage flowing into the aerobic reaction chamber in the anoxic reaction chamber, the filtered sewage is discharged into the aerobic reaction chamber, the intercepted biological mud is conveyed upwards under the action of the mud scraping belt and the mud scraping plate, the scraped mud is discharged onto the mud returning plate after the mud scraping plate moves over the top end of the mud scraping belt, and then the scraped mud is thrown into the anoxic reaction chamber again through the mud returning plate; the design of the whole biological mud interception mechanism not only effectively avoids the loss of biological mud in the anoxic reaction chamber and ensures that the quantity of the biological mud in the anoxic reaction chamber is always maintained in an optimal value, but also the circulation movement of the scraping plate can clear intercepted mud, so that the blocking of the filter holes at the lower end of the filter cover is avoided, and the filtering interception effect of sewage is ensured.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The AAO sewage treatment device based on anaerobic ammonia oxidation is characterized by comprising a treatment box and a control cabinet, wherein the inside of the treatment box is sequentially divided into an anaerobic reaction chamber, an anoxic reaction chamber, an aerobic reaction chamber and a sedimentation chamber from left to right by a plurality of partition boards, a first overflow port, a second overflow port and an overflow pipe are respectively arranged on the partition boards from left to right, a water inlet pipe is arranged on the outer side wall of the anaerobic reaction chamber, a clear water discharge pipe is arranged on the outer side wall of the sedimentation chamber, two pneumatic stirrers are respectively arranged at the centers of the bottom walls of the anaerobic reaction chamber, the anoxic reaction chamber and the aerobic reaction chamber, and are sequentially connected in series by an air pipe, an air compressor is arranged on the outer side surface of the treatment box and is connected with the first pneumatic stirrer in the anaerobic reaction chamber, and an aeration head is arranged on the air pipe positioned in the aerobic reaction chamber;
the anaerobic reaction chamber with adjustable distance biological membrane stores pylon all is provided with in the anoxic reaction chamber, the adjustable distance biological membrane stores pylon is including setting up anaerobic reaction chamber or horizontal spout on the anoxic reaction chamber both sides wall, two be provided with two fork expansion brackets that align to set up between the horizontal spout, two every central intersection position department of fork expansion bracket all is provided with the horizontal pole, the both ends of horizontal pole all are provided with and stretch into slider in the horizontal spout, every equal interval is provided with a plurality of biological hanging membranes on the horizontal pole, the adjustable distance biological membrane stores pylon is still including realizing the drive arrangement that the fork expansion bracket both ends shrink to central department.
2. The anaerobic ammonia oxidation-based AAO sewage treatment device according to claim 1, wherein the driving device comprises screw nuts connected to the foremost and rearmost cross bars, two screw nuts are connected with a bidirectional screw in a threaded manner, and one end of the bidirectional screw is connected with a screw motor.
3. The anaerobic ammonia oxidation-based AAO sewage treatment device according to claim 1, wherein the pneumatic stirrer comprises a bracket and a disc shell, the disc shell is connected with the upper end of the bracket, a rotating shaft extending into the bracket is concentrically and rotatably connected in the disc shell, an air vane is arranged on the rotating shaft positioned in the disc shell, the lower end of the rotating shaft is connected with a stirring blade positioned in the bracket, and two tangential pipes connected with the air pipe are connected on the circumferential surface of the disc shell.
4. An anaerobic ammonia oxidation-based AAO sewage treatment device according to claim 3, wherein a sealing bearing arranged in cooperation with the rotating shaft is arranged at the joint of the disc housing and the bracket.
5. An anaerobic ammonia oxidation based AAO sewage treatment device according to claim 3, wherein the air compressor has an air outlet end connected with a three-way valve, and the air compressor is connected with the air pipes in the anaerobic reaction chamber and the aerobic reaction chamber through the three-way valve, respectively.
6. The anaerobic ammonia oxidation-based AAO sewage treatment device according to claim 1, wherein a biological mud interception mechanism is arranged on the partition board at the second overflow port, the biological mud interception mechanism comprises a filter cover connected with the partition board, the second overflow port is communicated with the filter cover, and a filter hole is formed in the lower end of the filter cover.
7. The anaerobic ammonia oxidation-based AAO sewage treatment device according to claim 6, wherein belt rollers are arranged at the upper end and the lower end of the filter cover, one end of each belt roller positioned at the upper end is connected with a driving motor, a mud scraping belt is arranged between the two belt rollers, and a plurality of mud scraping plates are connected to the outer side face of each mud scraping belt at equal intervals.
8. The anaerobic ammonia oxidation-based AAO sewage treatment device according to claim 7, wherein a sludge return port is formed in the partition plate above the second overflow port, a mud return plate is obliquely inserted into the sludge return port, a pressing projection is arranged at the end part of the mud return plate, a spring is arranged between the pressing projection and the partition plate, and a cam is arranged on a roller shaft of the belt roller at the upper end.
9. The anaerobic ammonia oxidation-based AAO sewage treatment device according to claim 1, wherein a sedimentation bucket is arranged in the sedimentation chamber, the overflow pipe extends into an upper end opening of the sedimentation bucket, and a sludge auger conveyor extending out of the treatment tank is connected to the lower end of the sedimentation bucket.
10. The anaerobic ammonia oxidation-based AAO sewage treatment device according to claim 1, wherein the anaerobic reaction chamber, the anoxic reaction chamber and the aerobic reaction chamber are provided with a pH value on-line monitor and a temperature detection control device.
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| CN202310841117.1A CN116675343A (en) | 2023-07-10 | 2023-07-10 | AAO sewage treatment plant based on anaerobic ammonia oxidation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116986711A (en) * | 2023-09-28 | 2023-11-03 | 广州水务环保技术有限公司 | Advanced dephosphorization device for sewage treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116986711A (en) * | 2023-09-28 | 2023-11-03 | 广州水务环保技术有限公司 | Advanced dephosphorization device for sewage treatment |
| CN116986711B (en) * | 2023-09-28 | 2023-12-12 | 广州水务环保技术有限公司 | Advanced dephosphorization device for sewage treatment |
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