CN211688478U - Sequencing batch sewage treatment device with high denitrification rate - Google Patents
Sequencing batch sewage treatment device with high denitrification rate Download PDFInfo
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- CN211688478U CN211688478U CN202020106560.6U CN202020106560U CN211688478U CN 211688478 U CN211688478 U CN 211688478U CN 202020106560 U CN202020106560 U CN 202020106560U CN 211688478 U CN211688478 U CN 211688478U
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Abstract
The utility model discloses a sequencing batch sewage treatment plant of high denitrogenation rate, include: the biochemical tank is internally provided with a selection area, an anaerobic area and a main reaction area which are communicated in sequence; the front end of the selection area is provided with a water inlet pipe; diving stirrers are arranged in the selection zone, the anaerobic zone and the main reaction zone; an aerator is arranged at the bottom of the front end in the main reaction zone; a decanter is arranged at the rear end in the main reaction zone and is connected with a water outlet pipe; a sludge reflux pump is arranged in the main reaction zone and is connected to the anaerobic zone through a pipeline; and a surplus sludge discharge pump is arranged in the main reaction zone and is connected with a surplus sludge discharge pipeline. The sewage treatment device is provided with the submersible stirrer in the main reaction zone, can realize an independent denitrification stage in operation, and has a denitrification rate far higher than that of a conventional CASS (Cyclic activated sludge System) pool and can reach 70-80%.
Description
Technical Field
The utility model relates to a municipal administration sewage treatment field especially relates to a sequencing batch sewage treatment plant of high denitrogenation rate.
Background
With the rapid development of urbanization in China and the annual improvement of sewage treatment standards, municipal sewage plants are often built, and the problems that the quantity of external carbon sources is increased and the land for water plants needs to be increased due to the fact that a denitrification process needs to be arranged in a deep treatment section because of high TN removal rate requirement are solved.
SUMMERY OF THE UTILITY MODEL
Based on the problem that prior art exists, the utility model aims at providing a sequencing batch sewage treatment plant of high denitrogenation rate can solve current advanced treatment section and set up denitrogenation technology, leads to the increase of external carbon source volume and needs the problem of newly-increased waterworks land used.
The utility model aims at realizing through the following technical scheme:
the embodiment of the utility model provides a sequencing batch sewage treatment plant of high denitrogenation rate, include:
the biochemical tank is internally provided with a selection area, an anaerobic area and a main reaction area which are communicated in sequence;
a water inlet pipe is arranged at the front end of the selection area;
submersible stirrers are arranged in the selection zone, the anaerobic zone and the main reaction zone;
an aerator is arranged at the bottom in the main reaction zone;
a water decanter is arranged at the rear end in the main reaction zone and is connected with a water outlet pipe;
a sludge return pump is arranged in the main reaction zone and is connected to the anaerobic zone through a sludge return pipe;
and an excess sludge discharge pump is arranged in the main reaction zone and is connected with an excess sludge discharge pipeline.
By the above technical scheme the utility model provides a can see out, the embodiment of the utility model provides a sequencing batch sewage treatment plant of high denitrogenation rate, its beneficial effect is:
the selective area, the anaerobic area and the main reaction area which are sequentially communicated are arranged in the biochemical pool, and the submersible stirrer is arranged in the main reaction area, so that an independent denitrification stage can be realized during operation, the denitrification rate of the biochemical pool is far higher than that of a conventional CASS pool, and can reach 70% -80%.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a sequencing batch sewage treatment plant with high denitrification efficiency according to an embodiment of the present invention;
the parts corresponding to each mark in the figure are: 1-a selection region; 2-an anaerobic zone; 3-a main reaction zone; 4-a water inlet valve; 5-a decanter; 6-a submersible stirrer; 7-sludge reflux pump; 8-excess sludge pump; 9-an aerator; 10-a biochemical pool; a-a water inlet pipe; b-a water outlet pipe; c-a sludge return pipe; d-excess sludge discharge pipe.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a sequencing batch sewage treatment apparatus with high denitrification rate, including:
the biochemical tank is internally provided with a selection area, an anaerobic area and a main reaction area which are communicated in sequence;
a water inlet pipe is arranged at the front end of the selection area;
submersible stirrers are arranged in the selection zone, the anaerobic zone and the main reaction zone;
an aerator is arranged at the bottom in the main reaction zone;
a water decanter is arranged at the rear end in the main reaction zone and is connected with a water outlet pipe;
a sludge return pump is arranged in the main reaction zone and is connected to the anaerobic zone through a sludge return pipe;
and an excess sludge discharge pump is arranged in the main reaction zone and is connected with an excess sludge discharge pipeline.
In the above sewage treatment apparatus, the sludge reflux pump and the excess sludge discharge pump are both located at the rear end of the main reaction zone.
In the above sewage treatment device, the water inlet pipe is provided with a water inlet valve.
The utility model provides a sewage treatment plant, through the selection district that sets up in proper order and communicate in biochemical pond, anaerobic zone and main reaction district, and set up the dive agitator in selection district and anaerobic zone, set up the decanter in main reaction district, mud backwash pump and surplus sludge discharge pump form the structure in similar CASS pond, nevertheless set up the dive agitator in main reaction district, be different from the CASS pond again, can realize the denitrification stage in the operation chronogenesis, its denitrogenation rate is far higher than conventional CASS pond, can reach 70% ~ 80%. By adopting the sewage treatment device, a TN removal process is not required to be arranged in the subsequent advanced treatment section, so that the land is saved, the complexity of system operation is reduced, and the labor cost of a water plant is saved; meanwhile, as the TN removal process is not arranged in the subsequent advanced treatment section, the raw water carbon source can be fully utilized, and the carbon source required by denitrification does not need to be supplemented in the advanced treatment section, so that the direct operation cost of the water plant is saved.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, the sequencing batch sewage treatment plant with high denitrification rate of the present invention has the following specific process flow:
the sewage treatment device operates according to sequencing batch intermittent water inlet and intermittent water outlet (a plurality of groups can be arranged in parallel to realize continuous water inlet and continuous water outlet), and each operation cycle is divided into the following 4 stages:
(1) water inlet and denitrification stage:
the water inlet valve is opened, and after sewage which accounts for 20-30% of the total volume of the device flows in, the water inlet valve is closed.
The water decanter is always closed at this stage, and the device does not discharge water.
The submerged stirrers of the main reaction zone and the anaerobic zone run, denitrification reaction occurs in the device, and the nitrate nitrogen of the inlet water and the original nitrate nitrogen in the device are converted into nitrogen to be removed.
(2) And (3) aeration nitrification stage:
the water inlet valve is closed, the water decanter is closed, and the device does not feed water or discharge water.
The submersible stirrer of the anaerobic zone operates, the submersible stirrer of the main reaction zone stops operating, and aeration is started in the main reaction zone.
The residual COD in the water inlet of the previous stage is removed in the main reaction zone, and the ammonia nitrogen in the water inlet of the previous stage is completely converted into nitrate nitrogen.
The sludge reflux pump is started, and the mixed liquid in the main reaction zone flows back to the anaerobic zone through the selection zone; after aerobic phosphorus release occurs in the main reaction zone, the mixed solution flows back to the anaerobic zone to absorb excessive phosphorus.
(3) A precipitation stage:
the water inlet valve is closed, the water decanter is closed, and the device does not feed water or discharge water.
And the submerged stirrer in the anaerobic zone is stopped, and the submerged stirrer in the main reaction zone is stopped.
The device begins to precipitate, and the mixed liquid in the main reaction zone gradually forms a supernatant layer and a sludge layer.
(4) Decanting stage:
closing the water inlet valve, opening the decanter, discharging supernatant (the same as water inflow) accounting for 20-30% of the total volume of the device, and discharging 20-30% of nitrate nitrogen in the device along with the supernatant; 70 to 80 percent of nitrate nitrogen remained in the device is thoroughly removed in the water inlet and denitrification stages of the next period. Finally, only less than 20-30% of total nitrogen is discharged out of the device, and the denitrification rate of the whole device is 70-80%.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. A sequencing batch sewage treatment device with high denitrification rate is characterized by comprising:
the biochemical tank is internally provided with a selection area, an anaerobic area and a main reaction area which are communicated in sequence;
a water inlet pipe is arranged at the front end of the selection area;
submersible stirrers are arranged in the selection zone, the anaerobic zone and the main reaction zone;
an aerator is arranged at the bottom of the front end in the main reaction zone;
a water decanter is arranged at the rear end in the main reaction zone and is connected with a water outlet pipe;
a sludge return pump is arranged in the main reaction zone and is connected to the anaerobic zone through a sludge return pipe;
and an excess sludge discharge pump is arranged in the main reaction zone and is connected with an excess sludge discharge pipeline.
2. The high denitrification rate sequencing batch sewage treatment plant of claim 1 wherein the sludge recirculation pump and the excess sludge discharge pump are both at the rear end of the main reaction zone.
3. The sequencing batch wastewater treatment plant with high denitrification rate as recited in claim 1 wherein the inlet conduit is provided with a water inlet valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020106560.6U CN211688478U (en) | 2020-01-17 | 2020-01-17 | Sequencing batch sewage treatment device with high denitrification rate |
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| CN202020106560.6U CN211688478U (en) | 2020-01-17 | 2020-01-17 | Sequencing batch sewage treatment device with high denitrification rate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113104965A (en) * | 2021-04-28 | 2021-07-13 | 大禹环保（天津）有限公司 | CAST technology integration reaction tank for rural domestic sewage treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113104965A (en) * | 2021-04-28 | 2021-07-13 | 大禹环保（天津）有限公司 | CAST technology integration reaction tank for rural domestic sewage treatment |
| CN113104965B (en) * | 2021-04-28 | 2024-03-29 | 大禹农村环境基础设施运营服务有限公司 | CAST process integrated reaction tank for rural domestic sewage treatment |
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