CN216808515U - AAO biological combination pond of multi-mode operation - Google Patents
AAO biological combination pond of multi-mode operation Download PDFInfo
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- CN216808515U CN216808515U CN202220405515.XU CN202220405515U CN216808515U CN 216808515 U CN216808515 U CN 216808515U CN 202220405515 U CN202220405515 U CN 202220405515U CN 216808515 U CN216808515 U CN 216808515U
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Abstract
A multi-mode operation AAO biological combination tank belongs to the field of sewage treatment. The method is characterized in that: the AAO biological combination tank can flexibly change the operation mode according to the conditions of the inlet water quality and the water temperature. Under the conditions of large water amount and high water temperature in summer, the sewage treated by AAO is shunted to the multifunctional pool and the external secondary sedimentation pool in the combined pool for mud-water separation, so that the treated water amount of the whole system is improved; under the conditions of less water amount and low water temperature in winter, the sewage after AAO treatment enters a multifunctional tank in the combined tank for advanced treatment, then enters a secondary aerobic tank and further enters a secondary sedimentation tank outside the combined tank for mud-water separation, and the standard reaching rate of the effluent is ensured.
Description
Technical Field
The utility model belongs to the field of sewage treatment.
Background
The operation of urban sewage treatment plants in China is obviously influenced by seasons, and the seasonal influence is mainly reflected in seasonal fluctuation of water temperature and inflow water quantity and water quality. Operation data and research of a large number of sewage treatment plants show that low temperature in winter causes reduction of biological activity, ammonia nitrogen and TN concentration of effluent are higher, temperature in summer is higher, but water volume is large, MLSS is higher, load of a secondary sedimentation tank is higher, and SS of effluent is higher.
The AAO process is widely applied to sewage treatment and is one of the mainstream processes adopted by the current town sewage treatment plant.
Disclosure of Invention
An AAO biological combination pond of multi-mode operation which characterized in that: a section of multifunctional tank is arranged in the AAO biological combination tank, and the multifunctional tank is used as a newly-added secondary sedimentation tank in summer and can be connected with an external secondary sedimentation tank in parallel to run, so that the running load of the secondary sedimentation tank is reduced; in winter, the secondary anoxic tank can be recovered and connected with an external secondary sedimentation tank in series to operate, so that the quality of the effluent water is guaranteed to be stable and reach the standard. The AAO biological combination tank is composed of a pre-anoxic tank 1, an anaerobic tank 2, an anoxic tank 3, an aerobic tank 4, a degassing tank 5, a multifunctional tank 6, a secondary aerobic tank 7 and a sludge reflux system 20. The multifunctional pool is provided with an overrunning pipe gate 13 and an overrunning pipe 15, water is drained to an external secondary sedimentation pool in summer, a scraping and sludge sucking machine 16 is arranged, sucked sludge enters an original mixed liquid backflow system 20 through a sludge discharge groove 18 and a sludge discharge pipe 19 on the top of the pool, a water inlet and distribution hole 14 is arranged, water is uniformly distributed, and water is uniformly discharged from a water outlet groove 17. The water outlet pipe is provided with a water outlet pipe gate 21 and an electromagnetic flowmeter 22 and goes to an external advanced treatment system. The secondary aerobic tank 7 is provided with a secondary aerobic tank hole gate 24 and a secondary aerobic tank outlet gate 25, which are closed in summer and opened in winter to ensure the operation condition under multiple modes.
Further, the effluent trough 17 adopts a stainless steel triangular weir, an up-down adjusting range of 10mm is set, the treated water quantity of the multifunctional pool is adjusted, and the flow of the multifunctional pool is fed back through an electromagnetic flowmeter 22 and a weir water head.
Further, the underwater part of the sludge scraping and sucking machine 16 is made of stainless steel.
The multifunctional pond is of a horizontal flow type, and the surface load is set to be 0.7m3/m2The water inlet holes 14 are set at a flow rate of 0.1m/s and the weir 17 is loaded at 1.7L/m/s.
The sludge flows back to enter a pre-anoxic tank firstly to eliminate the influence of nitrate in the sludge on anaerobic phosphorus removal; removing BOD of inlet water in the anaerobic tank5Anaerobic phosphorus release is performed. Carrying out ammoniation reaction on the organic nitrogen in the inlet water to generate ammonia nitrogen. The anoxic tank removes nitrate nitrogen which flows back from the aerobic tank by using denitrifying bacteria. The aerobic tank removes the BOD of the inlet water5Then, a nitration reaction occurs to produce nitrate nitrogen. The degassing tank removes redundant free oxygen in the aerobic tank;
when the submersible mixer runs in summer, the surmounting pipe gate is opened, the sludge scraping and sucking machine runs, the water outlet pipe gate is opened, the gate of the hole of the secondary aerobic tank is closed, the water outlet gate of the secondary aerobic tank is closed, and the submersible mixer is not opened.
When the submersible mixer runs in winter, the surpassing pipe gate is closed, the sludge scraping and sucking machine does not run, the water outlet pipe gate is closed, the inlet secondary aerobic pool hole gate is opened, the outlet secondary aerobic pool water outlet gate is opened, and the original submersible mixer is opened.
Aiming at the common problems of the urban sewage treatment plant in winter and summer, the utility model provides the AAO biological combination tank which can flexibly cope with the stable operation under the condition of multiple working conditions
Drawings
FIG. 1 is a floor plan of the present invention.
FIG. 2 is a sectional view taken along line A-A of FIG. 1
Description of numbering: 1, a pre-anoxic pond; 2, an anaerobic tank; 3, an anoxic pond; 4, an aerobic tank; 5, degassing a pool; 6, a multifunctional pool; 7, a secondary aerobic tank; 8, a pre-anoxic tank flow impeller; 9, an anaerobic tank impeller; 10, a flow impeller of the anoxic pond; 11 an aeration system of the aerobic tank; 12 a nitrifying liquid reflux pump; 13 overriding the tube gate; 14 water inlet and distribution holes; 15 beyond the tube; 16 a mud scraping and sucking machine; 17, discharging a water tank; 18 sludge discharge grooves; 19 a mud pipe; 20 a sludge return system; 21 outlet pipe gate; 22 an electromagnetic flow meter; 23 to an in-depth treatment pipeline; 24, feeding into a secondary aerobic tank hole gate; 25 a water outlet gate of the secondary aerobic tank; 26 a water outlet pipe of the secondary aerobic tank; 27 original submersible mixer.
Detailed Description
When the submersible mixer runs in summer, the surpassing pipe gate 13 is opened, the mud scraping and sucking machine 16 runs, the water outlet pipe gate 21 is opened, the inlet second-stage aerobic pool hole gate 24 is closed, the outlet second-stage aerobic pool water outlet gate 25 is closed, and the original submersible mixer 27 is not opened.
When the device runs in winter, the surpassing pipe gate 13 is closed, the mud scraping and sucking machine 16 does not run, the water outlet pipe gate 21 is closed, the inlet second-stage aerobic pool hole gate 24 is opened, the outlet second-stage aerobic pool water outlet gate 25 is opened, and the original submersible mixer 27 is opened.
1) Mounting location
The multifunctional pool is positioned in the original secondary anoxic pool.
2) Function and connection
The method comprises the steps that water is firstly connected with a pre-anoxic tank 1 through a pipeline, the pre-anoxic tank 2 is connected with an anaerobic tank 2 through a gallery, the anaerobic tank 2 is connected with an anoxic tank 3 through a pipeline, the anoxic tank 3 is in a gallery type, the anoxic tank 3 is connected with an aerobic tank 4 through a hole, the aerobic tank 4 is divided into two grids, the aerobic tank 4 is connected with a degassing tank 5 through a hole, the degassing tank 5 is connected with a multifunctional tank 6 through a hole, the multifunctional tank 6 is connected with a secondary aerobic tank 7 through a water outlet groove 17, the secondary aerobic tank 7 is connected with a subsequent treatment unit through a pipeline, a pre-anoxic tank impeller 8 is arranged on the wall of the pre-anoxic tank 1, an anaerobic tank impeller 9 is arranged on the wall of the anaerobic tank 2, an anoxic tank impeller 10 is arranged on the wall of the anaerobic tank 3, an anoxic tank aeration system 11 is arranged at the bottom of the aerobic tank 4, a nitrifying liquid reflux pump 12 is arranged on the wall of the degassing tank 5, an overrunning pipe gate 13, a water inlet distribution hole 14, an overrunning pipe 15, a sludge scraping and sucking machine 16, The water outlet groove 17, the sludge discharge groove 18, the sludge discharge pipe 19, the water outlet pipe gate 21, the electromagnetic flow meter 22 and the advanced treatment pipeline 23 are arranged in the multifunctional tank 6, the sludge reflux system 20 is arranged at the side of the channels of the aerobic tank 4 and the anoxic tank 3, the gate 24 entering the hole of the secondary aerobic tank, the water outlet gate 25 of the secondary aerobic tank and the water outlet pipe 26 of the secondary aerobic tank are arranged in the secondary aerobic tank 7,
the original submersible mixer 27 is placed in the multi-purpose tank 6.
First, a pre-anoxic pond
The sludge flows back to enter a pre-anoxic tank firstly, so that the influence of nitrate in the sludge on anaerobic phosphorus removal is eliminated.
② anaerobic pool
Removal of BOD of influent water5Anaerobic phosphorus release is performed. Carrying out ammoniation reaction on the organic nitrogen in the inlet water to generate ammonia nitrogen.
③ anoxic pond
Nitrate nitrogen which flows back from the aerobic tank is removed by denitrifying bacteria.
Aerobic tank
Removal of BOD of influent water5Then, a nitration reaction occurs to produce nitrate nitrogen.
Fifthly, the degassing tank
And removing redundant free oxygen in the aerobic tank to ensure normal denitrification in the anoxic tank.
Sixth multifunctional pool
In summer, the load of the secondary sedimentation tank is reduced as a newly added secondary sedimentation tank; the anaerobic tank is used as a secondary anoxic tank in winter, and the removal of TN is ensured.
Seventh stage aerobic pool
In summer, the starting is not performed; in winter, the operation is started.
Eighthly, a pre-anoxic tank current impeller; ninthly, an anaerobic tank plug flow device; the oxygen deficient pool in the red (R) pushes flow device;
an aerobic tank aeration system;
a nitrifying liquid reflux pump;
ensures the stable operation of each process section and the treatment effect.
and a cast iron copper-inlaid gate is adopted to control the operation mode of the multifunctional pool.
ensures the uniform water distribution of the multifunctional tank when the multifunctional tank is used as a secondary sedimentation tank.
is connected to the original water outlet pipe, and realizes the water diversion function in summer.
the underwater part is made of stainless steel, the sludge suction pump adopts a submersible sewage pump, and the flow rate adopts 100 percent of sludge backflow flow rate.
stainless steel is adopted, and a triangular weir is arranged for water outflow.
the stainless steel material is adopted, and the mixed liquid is placed on the walkway plate and automatically flows into the original mixed liquid return channel.
the original mixed liquid reflux system is used for a sludge reflux system when the multifunctional tank is used as a secondary sedimentation tank.
and a cast iron copper-inlaid gate is adopted to control the operation mode and the operation flow of the multifunctional pool.
and feeding back the running flow of the multifunctional pool.
when the device runs in summer, the multifunctional pool is used as a secondary sedimentation pool and directly enters an external advanced treatment system.
the biochemical pool is opened as a secondary aerobic pool when running in winter, so that the standard of TN in the biochemical pool in winter is guaranteed.
And in the multifunctional pool, the multifunctional pool is opened in winter, and the multifunctional pool is used as a secondary anoxic pool to operate.
3) Principle of action
The use function of the multifunctional pool is controlled by the opening and closing of the surpassing pipe gate 13, the water outlet pipe gate 21, the secondary aerobic pool hole gate 24 and the secondary aerobic pool water outlet gate 25 to control whether the mud scraping and sucking machine 16 and the submersible stirrer 27 operate or not, so that the aim of multi-mode operation is fulfilled.
Claims (3)
1. An AAO biological combination pond of multi-mode operation which characterized in that: the water inlet pipe is connected with the pre-anoxic tank, the anoxic tank is connected with the anaerobic tank through a gallery, the anaerobic tank is connected with the anoxic tank through a pipeline, the anoxic tank is connected with the aerobic tank through a hole, the aerobic tank is divided into two lattices, the aerobic tank is connected with the degassing tank through a hole, the degassing tank is connected with the multifunctional tank through a hole, the multifunctional tank is connected with the secondary aerobic tank through a water outlet groove, the secondary aerobic tank is connected with the subsequent treatment unit through a pipeline, the pre-anoxic tank impeller is arranged on the wall of the pre-anoxic tank, the anaerobic tank impeller is arranged on the wall of the anaerobic tank, the anoxic tank impeller is arranged on the wall of the anoxic tank, the aerobic tank aeration system is arranged at the bottom of the aerobic tank, the nitrification liquid reflux pump is arranged on the wall of the degassing tank, the overflow pipe gate, the water inlet distribution hole, the overflow pipe, the sludge scraping and sucking machine, the water outlet groove, the sludge discharge pipe, the water outlet pipe gate, the electromagnetic flowmeter and the advanced treatment pipeline are arranged in the multifunctional tank, the sludge return system is arranged at the side of the aerobic tank and the anoxic tank, a secondary aerobic tank hole gate, a secondary aerobic tank water outlet gate and a secondary aerobic tank water outlet pipe are arranged in the secondary aerobic tank, and the submersible mixer is arranged in the multifunctional tank.
2. The AAO bioconjugate pool of claim 1, wherein: the water outlet groove adopts a stainless steel triangular weir, and the vertical adjusting range of the water outlet groove is set to be 10 mm.
3. The AAO bioconjugate pool of claim 1, wherein: the underwater part of the mud scraping and sucking machine is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220405515.XU CN216808515U (en) | 2022-02-27 | 2022-02-27 | AAO biological combination pond of multi-mode operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220405515.XU CN216808515U (en) | 2022-02-27 | 2022-02-27 | AAO biological combination pond of multi-mode operation |
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| Publication Number | Publication Date |
|---|---|
| CN216808515U true CN216808515U (en) | 2022-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220405515.XU Active CN216808515U (en) | 2022-02-27 | 2022-02-27 | AAO biological combination pond of multi-mode operation |
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| CN (1) | CN216808515U (en) |
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2022
- 2022-02-27 CN CN202220405515.XU patent/CN216808515U/en active Active
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