CN211111295U - Static sinking type sewage treatment device - Google Patents
Static sinking type sewage treatment device Download PDFInfo
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- CN211111295U CN211111295U CN201922062956.5U CN201922062956U CN211111295U CN 211111295 U CN211111295 U CN 211111295U CN 201922062956 U CN201922062956 U CN 201922062956U CN 211111295 U CN211111295 U CN 211111295U
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Abstract
The utility model discloses 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, the quiet heavy pond sub-unit connection mud back flow. The utility model discloses can reduce the influence of backward flow in-process dissolved oxygen to sewage treatment effect, improve and nitrify liquid and mud backward flow quality.
Description
Technical Field
The utility model belongs to the environmental protection field, concretely relates to quiet formula sewage treatment plant that sinks.
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.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a formula sewage treatment plant sinks calmly can reduce the influence of backward flow in-process dissolved oxygen to sewage treatment effect, improves nitrifying liquid and mud backward flow quality.
In order to achieve the above purpose, the utility model provides a 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 beneficial effects of the utility model reside in that:
the utility model discloses set up quiet heavy pond between good oxygen pond and two heavy ponds, get the mixed liquid in quiet heavy pond upper portion and be used for nitrifying the liquid backward flow, lower part mud is used for the mud backward flow, can reach following technological effect:
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 purpose, technical scheme and beneficial effect of the utility model clearer, the utility model provides a following figure explains:
FIG. 1 is a schematic plan view of the static sewage treatment apparatus of the present invention;
fig. 2 is a schematic sectional view of the static settling sewage treatment device of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting 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. The utility model discloses in, "5 upper portions in quiet heavy pond are connected" with anaerobism pond 1 and/or oxygen deficiency pond 2 through nitrifying liquid back flow 6 and nitrifying liquid backwash pump 12 and indicate that nitrifying liquid can flow back to anaerobism pond 1 or oxygen deficiency pond 2, perhaps flow back to anaerobism pond 1 and oxygen deficiency pond 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. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present 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 |
|---|---|---|---|
| CN201922062956.5U CN211111295U (en) | 2019-11-26 | 2019-11-26 | Static sinking type sewage treatment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922062956.5U CN211111295U (en) | 2019-11-26 | 2019-11-26 | Static sinking type sewage treatment device |
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| CN211111295U true CN211111295U (en) | 2020-07-28 |
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| CN201922062956.5U Active CN211111295U (en) | 2019-11-26 | 2019-11-26 | Static sinking type sewage treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759474A (en) * | 2019-11-26 | 2020-02-07 | 重庆环保投资集团有限公司 | Static sinking type sewage treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759474A (en) * | 2019-11-26 | 2020-02-07 | 重庆环保投资集团有限公司 | Static sinking type sewage treatment device |
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