CN110759474A - Static sinking type sewage treatment device - Google Patents
Static sinking type sewage treatment device Download PDFInfo
- Publication number
- CN110759474A CN110759474A CN201911172362.8A CN201911172362A CN110759474A CN 110759474 A CN110759474 A CN 110759474A CN 201911172362 A CN201911172362 A CN 201911172362A CN 110759474 A CN110759474 A CN 110759474A
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- tank
- static
- sedimentation tank
- sewage treatment
- static sedimentation
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- 230000003068 static effect Effects 0.000 title claims abstract description 50
- 239000010865 sewage Substances 0.000 title claims abstract description 31
- 238000004062 sedimentation Methods 0.000 claims abstract description 52
- 239000010802 sludge Substances 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000001546 nitrifying effect Effects 0.000 claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 206010021143 Hypoxia Diseases 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 238000010992 reflux Methods 0.000 abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 14
- 229910052698 phosphorus Inorganic materials 0.000 description 14
- 239000011574 phosphorus Substances 0.000 description 14
- 239000000126 substance Substances 0.000 description 8
- 238000005345 coagulation Methods 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
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- 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 discloses a static sedimentation type sewage treatment device which comprises an anaerobic tank, an anoxic tank, an aerobic tank and a secondary sedimentation tank, and further comprises a static sedimentation tank arranged between the aerobic tank and the secondary sedimentation tank, wherein water is fed into the lower part of the static sedimentation tank, water is discharged from the upper part of the static sedimentation tank, the anaerobic tank, the anoxic tank, the aerobic tank, the static sedimentation tank and the secondary sedimentation tank are sequentially connected, the upper part of the static sedimentation tank is connected with a nitrifying liquid return pipe, and the lower part of the static sedimentation tank is connected with a sludge return pipe. The invention can reduce the influence of dissolved oxygen on the sewage treatment effect in the reflux process and improve the reflux quality of the nitrifying liquid and the sludge.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a static sinking type sewage treatment device.
Background
The anaerobic-Aerobic (AO) process and anaerobic-anoxic-aerobic (AAO) process are commonly used sewage treatment process, can be used for secondary sewage treatment or tertiary sewage treatment, and can be used for reuse of reclaimed water, and possesses good effect for removing nitrogen and phosphorus, and it includes three processes of ① anaerobic reactor, in which the raw sewage and phosphorus-containing reflux sludge discharged from secondary sedimentation tank can be synchronously fed, and its main function is to release phosphorus, at the same time a portion of organic matter can be ammoniated, ② anoxic reactor, in which the primary function is to remove nitrogen, nitrate nitrogen is fed from aerobic reactor by means of internal circulation, and the circulating mixed liquor quantity is greater, generally 2Q (Q is raw sewage flow quantity), ③ aerobic reactor-aeration tank, said reaction unit is multifunctional, and the BOD removal, nitrification and phosphorus absorption are implemented, and the mixed liquor with flow quantity of 2Q is returned from said anoxic reactor.
From the operation condition of the existing sewage treatment station adopting the traditional AAO process, the dephosphorization effect is difficult to improve, and the sludge growth has a certain limit and is difficult to improve; the denitrification effect is difficult to be further improved. In order to reduce the retention time and prevent the anaerobic state and the phosphorus release phenomenon of the sludge, the treated water entering the secondary sedimentation tank needs to keep a certain concentration of dissolved oxygen, but in order to prevent the interference of the circulating mixed liquor on the anoxic reactor, the concentration of the dissolved oxygen is not too high, so the process is difficult to control stably.
Disclosure of Invention
In view of this, the present invention provides a static settling sewage treatment apparatus, which can reduce the influence of dissolved oxygen on the sewage treatment effect during the backflow process, and improve the backflow quality of the nitrification liquid and the sludge.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a quiet formula sewage treatment plant that sinks, sewage treatment plant includes anaerobism pond, oxygen deficiency pond, good oxygen pond and two heavy ponds, sewage treatment plant is still including setting up the quiet heavy pond between good oxygen pond and two heavy ponds, the lower part of quiet heavy pond is intake, the upper portion in quiet heavy pond goes out water, anaerobism pond, oxygen deficiency pond, good oxygen pond, quiet heavy pond and two heavy ponds connect gradually, the quiet heavy pond upper portion is connected and is nitrified the liquid back flow, quiet heavy pond sub-unit connection mud back flow.
As a preferable technical scheme, a coagulation reaction tank is also arranged in the static sedimentation tank and is arranged at the upper part of the static sedimentation tank.
As a preferred technical scheme, the bottom of the static sedimentation tank is provided with an inclined plane, and the bottom of the inclined plane is positioned at the water inlet.
As a preferred technical scheme, a water inlet and a water outlet of the static sedimentation tank are positioned at the same side.
As a preferable technical scheme, the upper part of the static sedimentation tank is connected with the anaerobic tank and/or the anoxic tank through a nitrifying liquid return pipe and a nitrifying liquid return pump, and the lower part of the static sedimentation tank is connected with the anaerobic tank, the anoxic tank and/or the aerobic tank through a sludge return pipe and a sludge return pump.
The invention has the beneficial effects that:
according to the invention, the static settling tank is arranged between the aerobic tank and the secondary settling tank, mixed liquor at the upper part of the static settling tank is taken for nitrifying liquid backflow, sludge at the lower part is taken for sludge backflow, and the following technical effects can be achieved:
1. and part of the mixed liquid dissolved oxygen is digested in the static sedimentation tank, so that the treatment effect is prevented from being influenced by overhigh dissolved oxygen in an anoxic tank (anaerobic tank) caused by the direct reflux of the nitrifying liquid in the aerobic tank.
2. The static sedimentation tank realizes better separation of activated sludge and dead (deflocculated) sludge, and in the static sedimentation tank, the good activated sludge has better sedimentation effect than the dead (deflocculated) sludge, thereby improving the sludge backflow quality.
3. The SS content of the effluent of the static settling tank is low, the dosage of a phosphorus removing agent of a rear-end chemical phosphorus removal process unit is greatly reduced, and meanwhile, the SS of the effluent of the static settling tank can be used as a condensation nucleus for chemical phosphorus removal, so that the precipitation effect of the chemical phosphorus removal is ensured.
4. And sewage treatment plants of the first-class B standard and the following standard of pollutant discharge Standard of municipal sewage treatment plants (GB18918-2002) are executed on effluent, so that the construction investment of a three-sedimentation tank can be saved, and chemical sludge backflow formed after a phosphorus removing agent is added to the front end of a secondary sedimentation tank is effectively avoided.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a schematic plan view of a static sewage treatment apparatus according to the present invention;
FIG. 2 is a schematic sectional view of the static settling sewage treatment apparatus of the present invention.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
As shown in fig. 1 and 2, a quiet heavy formula sewage treatment plant, sewage treatment plant includes anaerobism pond 1, oxygen deficiency pond 2, good oxygen pond 3 and two heavy ponds 4, sewage treatment plant is still including setting up the quiet heavy pond 5 between good oxygen pond 3 and two heavy ponds 4, the lower part of quiet heavy pond 5 is intake, the upper portion of quiet heavy pond 5 is gone out water, anaerobism pond 1, oxygen deficiency pond 2, good oxygen pond 3, quiet heavy pond 5 and two heavy ponds 4 connect gradually, the liquid reflux pipe 6 that nitrifies is connected on 5 upper portions of quiet heavy pond, the 5 sub-unit connection mud reflux pipe 7 of quiet heavy pond.
And a coagulation reaction tank 8 is also arranged in the static sedimentation tank 5, and the coagulation reaction tank 8 is arranged at the upper part of the static sedimentation tank 5.
The bottom of the static sedimentation tank 5 is provided with an inclined plane 9, the bottom of the inclined plane 9 is positioned at the water inlet, and the inclined plane 9 is favorable for sludge sedimentation.
The water inlet 10 and the water outlet 11 of the static sedimentation tank 5 are positioned at the same side, which is beneficial to the sedimentation of sludge in the return flow.
The upper part of the static sedimentation tank 5 is connected with the anaerobic tank 1 and/or the anoxic tank 2 through a nitrifying liquid return pipe 6 and a nitrifying liquid return pump 12, and the lower part of the static sedimentation tank 5 is connected with the anaerobic tank 1, the anoxic tank 2 and/or the aerobic tank 3 through a sludge return pipe 7 and a sludge return pump 13. In the invention, the upper part of the static sedimentation tank 5 is connected with the anaerobic tank 1 and/or the anoxic tank 2 through the nitrifying liquid return pipe 6 and the nitrifying liquid return pump 12, which means that nitrifying liquid can flow back to the anaerobic tank 1 or the anoxic tank 2, or flow back to the anaerobic tank 1 and the anoxic tank 2 simultaneously. The lower part of the static sedimentation tank 5 is connected with the anaerobic tank 1, the anoxic tank 2 and/or the aerobic tank 3 through the sludge return pipe 7 and the sludge return pump 13, which means that sludge can flow back to the anaerobic tank 1, the anoxic tank 2 or the aerobic tank 3, or simultaneously flow back to two or three of the anaerobic tank 1, the anoxic tank 2 and the aerobic tank 3.
The operation process of the static settling type sewage treatment device comprises the following steps: the sludge-water mixture in the aerobic tank 3 enters the static sedimentation tank 5 from the lower part, in the static sedimentation tank 5, sludge is precipitated at the lower part and flows back through a sludge return pipe 7 (according to actual working conditions, the sludge can flow back to the anaerobic tank 1, the anoxic tank 2 and/or the aerobic tank 3), and the static sedimentation tank 5 realizes better separation of activated sludge and dead (deflocculated) sludge, thereby improving the sludge return quality. The mixed liquid at the upper part of the static sedimentation tank 5 flows back through the nitrifying liquid return pipe 6 (according to actual working conditions, the mixed liquid can flow back to the anaerobic tank 1 and/or the anoxic tank 2), and the static sedimentation tank digests part of dissolved oxygen of the mixed liquid, so that the treatment effect is prevented from being influenced by overhigh dissolved oxygen of the anoxic tank (anaerobic tank) caused by the direct return of the nitrifying liquid in the aerobic tank.
In addition, flocculating agents and the like are added into the coagulation reaction tank 8 for coagulation reaction, so that the adding amount of phosphorus removing agents of the rear-end chemical phosphorus removing process unit is greatly reduced, the precipitation effect of chemical phosphorus removal is ensured, meanwhile, the chemical sludge backflow formed after the phosphorus removing agents are added at the front end of the secondary sedimentation tank 4 is effectively avoided, and the chemical sludge is directly discharged to the sludge tank through the sludge discharge pipe 14 and the sludge discharge pump 15.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (5)
1. The utility model provides a formula sewage treatment plant sinks calmly, sewage treatment plant includes anaerobism pond, oxygen deficiency pond, good oxygen pond and two heavy ponds, its characterized in that: the sewage treatment device further comprises a static sedimentation tank arranged between the aerobic tank and the secondary sedimentation tank, wherein water enters the lower part of the static sedimentation tank, water exits from the upper part of the static sedimentation tank, the anaerobic tank, the anoxic tank, the aerobic tank, the static sedimentation tank and the secondary sedimentation tank are sequentially connected, the upper part of the static sedimentation tank is connected with a nitrifying liquid return pipe, and the lower part of the static sedimentation tank is connected with a sludge return pipe.
2. The static-sinking sewage treatment plant according to claim 1, wherein: still be equipped with the reaction tank that thoughtlessly congeals in the quiet pond of sinking, the reaction tank that thoughtlessly congeals sets up in quiet pond upper portion that sinks.
3. The static-sinking sewage treatment plant according to claim 1, wherein: the bottom of the static sedimentation tank is provided with an inclined plane, and the bottom of the inclined plane is positioned at the water inlet.
4. The static-sinking sewage treatment plant according to claim 1, wherein: the water inlet and the water outlet of the static sedimentation tank are positioned on the same side.
5. The static-sinking sewage treatment apparatus according to any one of claims 1 to 4, wherein: the upper part of the static sedimentation tank is connected with the anaerobic tank and/or the anoxic tank through a nitrifying liquid return pipe and a nitrifying liquid return pump, and the lower part of the static sedimentation tank is connected with the anaerobic tank, the anoxic tank and/or the aerobic tank through a sludge return pipe and a sludge return pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172362.8A CN110759474A (en) | 2019-11-26 | 2019-11-26 | Static sinking type sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172362.8A CN110759474A (en) | 2019-11-26 | 2019-11-26 | Static sinking type sewage treatment device |
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| Publication Number | Publication Date |
|---|---|
| CN110759474A true CN110759474A (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911172362.8A Pending CN110759474A (en) | 2019-11-26 | 2019-11-26 | Static sinking type sewage treatment device |
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| Country | Link |
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| CN (1) | CN110759474A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111533260A (en) * | 2020-05-08 | 2020-08-14 | 格润克利环境科技有限公司 | Integrated sludge concentration separation backflow device and backflow process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362624A (en) * | 2008-07-10 | 2009-02-11 | 昆明理工大学 | Dispersive high-efficiency purification treatment equipment of sewage |
| CN104310700A (en) * | 2014-10-13 | 2015-01-28 | 山东益源环保科技有限公司 | Treatment method for wastewater containing high-concentration organic phosphorus |
| CN205710326U (en) * | 2016-05-27 | 2016-11-23 | 广西神环环保有限公司 | Automatic sludge returning formula sewage-treatment plant |
| CN206705785U (en) * | 2017-05-03 | 2017-12-05 | 祥云县扬帆环保科技有限公司 | A kind of biological respinse apparatus for treating sewage |
| CN211111295U (en) * | 2019-11-26 | 2020-07-28 | 重庆环保投资集团有限公司 | Static sinking type sewage treatment device |
-
2019
- 2019-11-26 CN CN201911172362.8A patent/CN110759474A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362624A (en) * | 2008-07-10 | 2009-02-11 | 昆明理工大学 | Dispersive high-efficiency purification treatment equipment of sewage |
| CN104310700A (en) * | 2014-10-13 | 2015-01-28 | 山东益源环保科技有限公司 | Treatment method for wastewater containing high-concentration organic phosphorus |
| CN205710326U (en) * | 2016-05-27 | 2016-11-23 | 广西神环环保有限公司 | Automatic sludge returning formula sewage-treatment plant |
| CN206705785U (en) * | 2017-05-03 | 2017-12-05 | 祥云县扬帆环保科技有限公司 | A kind of biological respinse apparatus for treating sewage |
| CN211111295U (en) * | 2019-11-26 | 2020-07-28 | 重庆环保投资集团有限公司 | Static sinking type sewage treatment device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111533260A (en) * | 2020-05-08 | 2020-08-14 | 格润克利环境科技有限公司 | Integrated sludge concentration separation backflow device and backflow process |
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