CN110606568A - Integrated A with embedded precipitation structure2/O biochemical tower - Google Patents
Integrated A with embedded precipitation structure2/O biochemical tower Download PDFInfo
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- CN110606568A CN110606568A CN201911077991.2A CN201911077991A CN110606568A CN 110606568 A CN110606568 A CN 110606568A CN 201911077991 A CN201911077991 A CN 201911077991A CN 110606568 A CN110606568 A CN 110606568A
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- reaction zone
- sludge
- embedded
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- 238000001556 precipitation Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000010802 sludge Substances 0.000 claims abstract description 61
- 238000006243 chemical reaction Methods 0.000 claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 238000004062 sedimentation Methods 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 13
- 238000010992 reflux Methods 0.000 claims description 28
- 239000002912 waste gas Substances 0.000 claims description 19
- 230000001546 nitrifying effect Effects 0.000 claims description 18
- 238000005276 aerator Methods 0.000 claims description 6
- 238000005273 aeration Methods 0.000 claims description 5
- 206010021143 Hypoxia Diseases 0.000 claims 1
- 230000005484 gravity Effects 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 4
- 239000011574 phosphorus Substances 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 239000013049 sediment Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 239000000945 filler Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 2
- 238000002306 biochemical method Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000002351 wastewater Substances 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (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 integrated A with an embedded precipitation structure2the/O biochemical tower comprises a tower body, wherein the tower body is vertically divided into an anaerobic reaction zone, an anoxic reaction zone, an aerobic reaction zone and a settling zone by a lower-layer liquid distributor, an upper-layer liquid distributor and a sludge hopper which are distributed from bottom to top, the settling zone is a vertical sedimentation tank, a guide cylinder, a bell mouth and a reflecting plate are arranged at the center of the vertical sedimentation tank, an overflow weir is arranged on the upper part of the vertical sedimentation tank along the periphery of the inner wall and is communicated with a water outlet self-flow pipeline, and the water and tail gas of the aerobic reaction zone flow into the guide cylinder through an aerobic water outlet and a settling zone water inlet pipe. The invention embeds integration A of sediment structure2the/O biochemical tower can efficiently and flexibly meet the requirements of carbon reduction, nitrogen removal and phosphorus removal, realize energy conservation and emission reduction, save land occupation, and run safely and stably.
Description
Technical Field
The invention belongs to the technical field of biochemical sewage treatment, and particularly relates to an integrated A with an embedded precipitation structure2a/O biochemical tower.
Background
In the biochemical method for sewage treatment, A2the/O biochemical and secondary sedimentation tank is a common biological combination process. At present, the conventional A in China2the/O process generally adopts split construction, is basically divided into four sections of reaction tanks, and sequentially comprises the following steps: anaerobic reactionThe tank, the anoxic tank, the aerobic tank and the secondary sedimentation tank are in horizontal plug flow type from the water flow direction. The process combination mode generally has the problems of large integral occupied area, easy generation of malodorous gas in the anaerobic tank and the secondary sedimentation tank, and the like. Therefore, how to solve the above problems and realize efficient biological treatment is an urgent problem.
Disclosure of Invention
The invention aims to solve the problem of the prior plug flow type A2The problems that the occupied area of an O biochemical tank is large, the anaerobic tank and a secondary sedimentation tank are easy to generate malodorous gas and the like generally exist, and an integrated A with an embedded sedimentation structure is provided2the/O biochemical tower can efficiently and flexibly meet the requirements of carbon reduction, nitrogen removal and phosphorus removal, realize energy conservation and emission reduction, save land occupation and run safely and stably.
In order to achieve the purpose, the invention adopts the technical scheme that: integrated A with embedded precipitation structure2the/O biochemical tower comprises a tower body, wherein the tower body is vertically divided into an anaerobic reaction zone, an anoxic reaction zone, an aerobic reaction zone and a settling zone by a lower-layer liquid distributor, an upper-layer liquid distributor and a sludge hopper which are distributed from bottom to top, the settling zone is a vertical sedimentation tank, a guide cylinder, a horn mouth and a reflecting plate are arranged at the center of the vertical sedimentation tank, an overflow weir is arranged on the upper part of the vertical sedimentation tank along the periphery of the inner wall and is communicated with a water outlet self-flow pipeline, and the effluent and tail gas of the aerobic reaction zone flow into the guide cylinder through an aerobic water outlet and a settling zone water inlet pipe.
Preferably, a sludge discharge port at the bottom of the sludge hopper is connected with a sludge return pipe and a sludge self-flowing discharge pipe, and one end of the sludge return pipe is communicated with the anaerobic reaction zone to realize circulation and discharge of sludge.
The anaerobic reaction zone, the anoxic reaction zone and the aerobic reaction zone are respectively provided with a filler, and a water inlet distribution pipe and a circulating water distribution sludge discharge pipe are sequentially arranged from top to bottom in the tower body and below the anaerobic reaction zone. The anaerobic reaction zone is provided with a self-circulation system, an anaerobic water outlet is communicated with the circulating water distribution sludge discharge pipe through a self-circulation pipeline and a self-circulation pump, the anaerobic water outlet is communicated with the self-circulation pump through a self-circulation pump water inlet pipe, and the self-circulation pump is communicated with the circulating water distribution sludge discharge pipe through a self-circulation pump water outlet pipe.
Preferably, a waste gas collecting cover is arranged above the settling zone, the top end of the waste gas collecting cover is communicated with a waste gas collecting pipe, and further, the waste gas collecting cover is a conical waste gas collecting cover. And the water inlet pipe of the settling zone is connected with a broken siphon pipe, and the broken siphon pipe is communicated with the waste gas collecting pipe through a waste gas pipe.
Preferably, the lower part of the anoxic reaction zone is provided with a reflux water distributor, and the aerobic water outlet and the reflux water distributor are communicated with a nitrifying liquid reflux pump through a nitrifying liquid reflux pipeline. Furthermore, the aerobic water outlet is provided with a tee joint, one pipeline is communicated with the nitrifying liquid reflux pump through a nitrifying liquid reflux pump water inlet pipe, and the nitrifying liquid reflux pump is communicated with the reflux water distributor through a nitrifying liquid reflux pump water outlet pipe; and the other pipeline is communicated with a water inlet pipe of the settling zone.
And a sludge discharge port at the bottom of the sludge hopper is provided with a tee joint, one pipeline is communicated with a sludge return pipe, and the other pipeline is communicated with a sludge self-flowing discharge pipe.
The lower part of the aerobic reaction zone is provided with a flow dispersing aerator which is communicated with an aeration distribution pipe.
The circulating water distribution sludge discharge pipe at the bottom of the tower is communicated with an external sludge discharge pipe, and sludge is discharged outside periodically.
The reflux pump and the self-circulation pump are arranged outside the tower body.
The invention has the advantages that
1) The invention relates to an integration A with an embedded precipitation structure2the/O biochemical tower is a traditional horizontal plug flow type A2The structure of the/O + secondary sedimentation tank combined biochemical tank is changed into vertical fully-mixed integrated equipment, so that the floor area is greatly saved, and the energy consumption of nitrifying liquid backflow, sludge backflow and residual sludge discharge is reduced.
2) The invention relates to an integration A with an embedded precipitation structure2The interior 4-section process sections of the/O biochemical tower are of a special structure which is vertically overlapped, so that the generation of anaerobic foul smell is avoided from the source, and the low boiling point of aerobic wastewater is reducedThe blowing volatilization of organic matters and the easy foam generation caused by the aerobic impact; meanwhile, the tower top is of a closed structure, so that the problem of collecting a small amount of generated waste gas is solved;
3) the invention relates to an integration A with an embedded precipitation structure2the/O biochemical tower can flexibly form a plurality of stages A through a plurality of stages in series connection2the/O process further enhances the effects of carbon removal, nitrogen removal and phosphorus removal.
4) The invention relates to an integration A with an embedded precipitation structure2the/O biochemical tower can be changed into a pure anaerobic process, a pure aerobic process and an A/O process through reasonably optimizing the structure, so that the biochemical tower has different biochemical effects.
5) The invention relates to an integration A with an embedded precipitation structure2the/O biochemical tower and the built-in liquid distributor form a sludge filter bed structure on the upper layers of the anaerobic reaction area and the anoxic reaction area respectively, so that sludge can be intercepted, and the sludge-water separation effect is enhanced.
In conclusion, the integration A of the invention with the embedded precipitation structure2the/O biochemical tower can efficiently and flexibly meet the requirements of carbon reduction, nitrogen removal and phosphorus removal, realize energy conservation and emission reduction, save land occupation, and run safely and stably.
Drawings
FIG. 1 shows an integration A of the present invention with an embedded precipitation structure2The structure of the/O biochemical tower is shown schematically.
Wherein, 1 is a lower layer liquid distributor, 2 is an upper layer liquid distributor, 3 is a sludge hopper, 4 is an anaerobic reaction zone, 5 is an anoxic reaction zone, 6 is an aerobic reaction zone, 7 is a sedimentation zone, 8 is a guide cylinder, 9 is a bell mouth, 10 is a reflecting plate, 11 is an overflow weir, 12 is an effluent self-flow pipeline, 13 is an aerobic water outlet, 14 is a sludge discharge port, 15 is a water inlet water distribution pipe, 16 is a circulating water distribution sludge discharge pipe, 17 is a sludge return pipe, 18 is a sludge self-flow discharge pipe, 19 is a return water distributor, 20 is a nitrification liquid return pipeline, 21 is a nitrification liquid return pump, 22 is a self-circulation pipeline, 23 is a self-circulation pump, 24 is an exhaust gas collecting cover, 25 exhaust gas collecting pipes, 26 is a broken siphon pipe, 27 is an exhaust gas pipe, 28 is an external sludge discharge pipe, 29 is a dispersed flow aerator, 30 is an aeration distribution pipe, and 31 is a sedimentation zone water inlet pipe.
Detailed Description
Example 1
As shown in fig. 1, an integration A with embedded precipitation structure2the/O biochemical tower comprises a tower body, wherein the tower body is vertically divided into an anaerobic reaction zone 4, an anoxic reaction zone 5, an aerobic reaction zone 6 and a sedimentation zone 7 by a lower-layer liquid distributor 1, an upper-layer liquid distributor 2 and a sludge hopper 3 which are distributed from bottom to top, the anaerobic reaction zone 4 and the anoxic reaction zone 5 are mutually independent and are only communicated through the lower-layer liquid distributor 1, the anoxic reaction zone 5 and the aerobic reaction zone 6 are mutually independent and are only communicated through the upper-layer liquid distributor 2, the sedimentation zone 7 is a vertical sedimentation tank, a guide cylinder 8, a horn mouth 9 and a reflecting plate 10 are arranged at the center of the vertical sedimentation tank, an overflow weir 11 is arranged at the periphery of the inner wall of the upper part, the overflow weir 11 is communicated with a water self-flowing pipeline 12, and the effluent and tail gas of the aerobic reaction zone 6 flow into the guide cylinder 8 through an aerobic water outlet 13 and a sedimentation zone water inlet 31.
And a waste gas collecting cover 24 is arranged above the settling zone 7, the top end of the waste gas collecting cover 24 is communicated with a waste gas collecting pipe 25, a broken siphon 26 is connected to a water inlet pipe 31 of the settling zone, and the broken siphon 26 is communicated with the waste gas collecting pipe 25 through a waste gas pipe 27. A sludge discharge port 14 at the bottom of the sludge hopper 3 is connected with a sludge return pipe 17 and a sludge self-flowing discharge pipe 18, and one end of the sludge return pipe 17 is communicated with the anaerobic reaction zone 4.
The anaerobic reaction zone 4, the anoxic reaction zone 5 and the aerobic reaction zone 6 are respectively provided with a filler, and a water inlet distribution pipe 15 and a circulating water distribution sludge discharge pipe 16 are sequentially arranged from top to bottom in the tower body and below the anaerobic reaction zone 4. The anaerobic reaction zone 4 is provided with a self-circulation system, an anaerobic water outlet is communicated with the circulation water distribution sludge discharge pipe 16 through a self-circulation pipeline 22 and a self-circulation pump 23, the anaerobic water outlet is communicated with the self-circulation pump 23 through a self-circulation pump water inlet pipe, the self-circulation pump 23 is communicated with the circulation water distribution sludge discharge pipe 16 through a self-circulation pump water outlet pipe, the circulation water distribution sludge discharge pipe 16 at the bottom of the tower is communicated with an external sludge discharge pipe 28, and sludge is discharged outside periodically.
The lower part of the anoxic reaction zone 5 is provided with a return water distributor 19, the aerobic water outlet 13 and the return water distributor 19 are communicated with a nitrifying liquid reflux pump 21 through a nitrifying liquid reflux pipeline 20, the aerobic water outlet 13 is provided with a tee joint, one pipeline is communicated with the reflux pump 21 through a nitrifying liquid reflux pump water inlet pipe, and the nitrifying liquid reflux pump 21 is communicated with the return water distributor 19 through a nitrifying liquid reflux pump water outlet pipe; and the other pipeline is communicated with a water inlet pipe 31 of the settling zone.
The lower part of the aerobic reaction zone 6 is provided with a dispersed flow aerator 29, and the dispersed flow aerator 29 is communicated with an aeration distribution pipe 30.
The reflux pump 21 and the self-circulation pump 23 are arranged outside the tower.
The invention discloses an integrated A with an embedded precipitation structure2The working principle of the/O biochemical tower is as follows:
the sewage to be treated enters the tower body through the water inlet distribution pipe 15, is mixed with the sludge which flows back periodically, and passes through the anaerobic reaction zone 4 to complete the biological carbon removal process, and the self-circulation system is arranged outside the anaerobic reaction zone 4 to strengthen mass transfer. Effluent and tail gas of the anaerobic reaction zone 4 flow into the anoxic reaction zone 5 through the lower-layer liquid distributor 1, are mixed with nitrifying liquid which flows back periodically, and generate biological denitrification in the filler of the anoxic reaction zone 4; the effluent and tail gas of the anoxic reaction zone 5 flow into the aerobic reaction zone 6 through the upper layer liquid distributor 2, and generate biological nitrification in the filler of the aerobic reaction zone 5 under the action of aerobic aeration; effluent and tail gas of the aerobic reaction zone flow into the precipitation zone through a precipitation zone water inlet pipe 31, under the combined action of the guide cylinder 8, the bell mouth 9 and the reflecting plate 10, mud and water are separated, supernatant is gathered to the overflow weir 11 and is discharged from an effluent self-flow pipeline 12. The tail gas of the settling zone and the broken siphon is discharged through a waste gas collecting pipe 25; the effluent treated by the anaerobic reaction zone 4 is sent back to the circulating water distribution and sludge discharge pipe 16 in the tower through a self-circulating pump water inlet pipe, a self-circulating pump 23 and a self-circulating pump water outlet pipe in sequence for recycling, and part of nitrified liquid treated by the aerobic reaction zone 6 is sent back to the reflux water distributor 19 in the tower through an aerobic water outlet 13, a nitrified liquid reflux pump water inlet pipe, a nitrified liquid reflux pump 21 and a nitrified liquid reflux pump water outlet pipe in sequence for recycling; part of sludge generated by sedimentation periodically returns to the anaerobic reaction zone 4 through a sludge return pipe 17 outside the tower for reuse, and part of sludge is used as residual sludge and is periodically discharged outside through a sludge self-flowing discharge pipe 18; the circulating water distribution sludge discharge pipe 16 at the bottom of the tower is communicated with an external sludge discharge pipe 28, and sludge is discharged outside periodically.
Claims (8)
1. Integrated A with embedded precipitation structure2the/O biochemical tower comprises a tower body and is characterized in that: the tower body is separated into anaerobic reaction district (4), oxygen deficiency reaction district (5), aerobic reaction district (6) and settling zone (7) by lower floor liquid distributor (1), upper strata liquid distributor (2) and sludge bucket (3) vertical division that distribute from bottom to top, settling zone (7) are vertical sedimentation tank, vertical sedimentation tank's center is provided with draft tube (8), horn mouth (9) and reflecting plate (10), and vertical sedimentation tank's upper portion is equipped with overflow weir (11) all around along the inner wall, and overflow weir (11) and play water gravity flow pipeline (12) intercommunication, the play water and the tail gas of aerobic reaction district (6) flow into the draft tube through aerobic delivery port (13) and settling zone inlet tube (31).
2. An integrated structure a with embedded precipitation structure as claimed in claim 12the/O biochemical tower is characterized in that: a sludge discharge port (14) at the bottom of the sludge hopper (3) is connected with a sludge return pipe (17) and a sludge self-flowing discharge pipe (18), and one end of the sludge return pipe (17) is communicated with the anaerobic reaction zone (4).
3. An integrated structure a with embedded precipitation structure as claimed in claim 12the/O biochemical tower is characterized in that: a water inlet and distribution pipe (15) and a circulating water distribution and sludge discharge pipe (16) are sequentially arranged in the tower body and below the anaerobic reaction zone (4) from top to bottom; the anaerobic reaction zone (4) is provided with a self-circulation system, and the anaerobic water outlet is communicated with the circulating water distribution sludge discharge pipe (16) through a self-circulation pipeline (22) and a self-circulation pump (23).
4. An integrated structure a with embedded precipitation structure as claimed in claim 12the/O biochemical tower is characterized in that: a waste gas collecting cover (24) is arranged above the settling zone (7), and the top end of the waste gas collecting cover (24) is communicated with a waste gas collecting pipe (25); the settling zone is filled with waterThe pipe (31) is connected with a broken siphon (26), and the broken siphon (26) is communicated with the waste gas collecting pipe (25) through a waste gas pipe (27).
5. An integrated structure a with embedded precipitation structure as claimed in claim 12the/O biochemical tower is characterized in that: the lower part of the anoxic reaction zone (5) is provided with a return water distributor (19), and the aerobic water outlet (13) and the return water distributor (19) are communicated with a nitrifying liquid reflux pump (21) through a nitrifying liquid reflux pipeline (20).
6. An integrated structure a with embedded precipitation structure as claimed in claim 12the/O biochemical tower is characterized in that: the aerobic water outlet (13) is provided with a tee joint, one pipeline is communicated with the nitrifying liquid reflux pump (21) through a nitrifying liquid reflux pump water inlet pipe, and the nitrifying liquid reflux pump (21) is communicated with the reflux water distributor (19) through a reflux pump water outlet pipe; and the other pipeline is communicated with a water inlet pipe (31) of the settling zone.
7. An integrated structure a with embedded precipitation structure as claimed in claim 12the/O biochemical tower is characterized in that: the lower part of the aerobic reaction zone (6) is provided with a flow dispersing aerator (29), and the flow dispersing aerator (29) is communicated with an aeration distribution pipe (30).
8. An integrated structure A with embedded precipitation structure as claimed in claim 32the/O biochemical tower is characterized in that: and a circulating water distribution sludge discharge pipe (16) of the anaerobic reaction zone (4) is communicated with an external sludge discharge pipe and periodically discharges sludge to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911077991.2A CN110606568A (en) | 2019-11-06 | 2019-11-06 | Integrated A with embedded precipitation structure2/O biochemical tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911077991.2A CN110606568A (en) | 2019-11-06 | 2019-11-06 | Integrated A with embedded precipitation structure2/O biochemical tower |
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| Publication Number | Publication Date |
|---|---|
| CN110606568A true CN110606568A (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911077991.2A Pending CN110606568A (en) | 2019-11-06 | 2019-11-06 | Integrated A with embedded precipitation structure2/O biochemical tower |
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| Country | Link |
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| CN (1) | CN110606568A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995054A (en) * | 2020-09-14 | 2020-11-27 | 兰州交通大学 | Sewage treatment device |
| CN116375204A (en) * | 2023-04-28 | 2023-07-04 | 湖南星湘盈环保科技有限公司 | Sewage treatment tower and application thereof |
| CN117263460A (en) * | 2023-11-06 | 2023-12-22 | 郑州市郑东新区水务有限公司 | Sewage treatment system for deep denitrification and dephosphorization |
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| WO2015085835A1 (en) * | 2013-12-10 | 2015-06-18 | 中国环境科学研究院 | Vertical sewage treatment device and method |
| CN204569652U (en) * | 2015-03-10 | 2015-08-19 | 浦华环保有限公司 | The hydrolysis of upflowing precipitation and two-stage AO biochemical treatment system |
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| CN208454618U (en) * | 2018-05-09 | 2019-02-01 | 王宇世 | A kind of integrated A/O pre-denitrification and denitrogenation biochemical tower |
| CN211198754U (en) * | 2019-11-06 | 2020-08-07 | 众意环保科技(大连)有限公司 | Integrated A2/O biochemical tower with embedded precipitation structure |
-
2019
- 2019-11-06 CN CN201911077991.2A patent/CN110606568A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202131151U (en) * | 2011-03-07 | 2012-02-01 | 北京泰格昌环保工程有限公司 | Efficient compound sewage treatment tower type bioreactor |
| WO2015085835A1 (en) * | 2013-12-10 | 2015-06-18 | 中国环境科学研究院 | Vertical sewage treatment device and method |
| CN204569652U (en) * | 2015-03-10 | 2015-08-19 | 浦华环保有限公司 | The hydrolysis of upflowing precipitation and two-stage AO biochemical treatment system |
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| CN211198754U (en) * | 2019-11-06 | 2020-08-07 | 众意环保科技(大连)有限公司 | Integrated A2/O biochemical tower with embedded precipitation structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995054A (en) * | 2020-09-14 | 2020-11-27 | 兰州交通大学 | Sewage treatment device |
| CN116375204A (en) * | 2023-04-28 | 2023-07-04 | 湖南星湘盈环保科技有限公司 | Sewage treatment tower and application thereof |
| CN116375204B (en) * | 2023-04-28 | 2023-12-22 | 湖南星湘盈环保科技有限公司 | Sewage treatment tower and application thereof |
| CN117263460A (en) * | 2023-11-06 | 2023-12-22 | 郑州市郑东新区水务有限公司 | Sewage treatment system for deep denitrification and dephosphorization |
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