CN219507751U - Device for treating nitrogen and phosphorus exceeding underground water by activated sludge process - Google Patents
Device for treating nitrogen and phosphorus exceeding underground water by activated sludge process Download PDFInfo
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- CN219507751U CN219507751U CN202223284923.3U CN202223284923U CN219507751U CN 219507751 U CN219507751 U CN 219507751U CN 202223284923 U CN202223284923 U CN 202223284923U CN 219507751 U CN219507751 U CN 219507751U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model belongs to the field of groundwater treatment, and particularly relates to a device for treating nitrogen and phosphorus exceeding underground water by an activated sludge process. Comprises a sludge circulation unit and a sewage circulation unit; the sewage circulation unit comprises an outer well pipe, a bin body arranged in the outer well pipe and a recharging well; the bin body comprises an anaerobic tank, an anoxic tank and an aerobic tank which are sequentially communicated from bottom to top; the outer well pipe is provided with a flower hole; the outer well pipe, the anaerobic tank, the anoxic tank, the aerobic tank and the recharging well form a sewage circulating waterway; aeration heads are arranged in the aerobic tank and the anoxic tank; the anaerobic tank, the anoxic tank and the aerobic tank are respectively provided with a microbial hanging film; the sludge circulation unit comprises a sludge tank connected with the aerobic tank through a sludge pipe and a sludge pump arranged on the sludge pipe. According to the device for treating the nitrogen and phosphorus out-of-standard groundwater by the activated sludge method, the device is used for repairing the nitrogen and phosphorus out-of-standard groundwater.
Description
Technical Field
The utility model belongs to the field of groundwater treatment, and particularly relates to a device for treating nitrogen and phosphorus exceeding underground water by an activated sludge process.
Background
The excessive nitrogen fertilizer and phosphorus fertilizer used in agricultural cultivation can be enriched in soil for a long time and continuously migrate into shallow groundwater environment along with rainwater, surface water runoff and the like, so that the nitrogen and phosphorus content of groundwater quality is easily out of standard. At present, no effective treatment method for the groundwater with exceeding nitrogen and phosphorus is available. The activated sludge process in the biological treatment method has good effect in denitrification and dephosphorization. In 1914, the adon (e.caden) and rokitt (w.t.lockett) in the united kingdom created an activated sludge process, which has been a history of hundreds of years to date. Along with the accumulation of practical operation experience and the development of scientific technology, the development of an activated sludge process is continuously improved and developed, and the activated sludge process is widely applied to urban sewage treatment plants at present and becomes one of the most widely applied methods in the field of sewage treatment.
Disclosure of Invention
The utility model aims to provide a device for treating nitrogen and phosphorus exceeding underground water by an activated sludge process.
The utility model adopts the following technical scheme to realize the aim:
an apparatus for treating nitrogen and phosphorus exceeding underground water by an activated sludge method comprises a sludge circulation unit and a sewage circulation unit;
the sewage circulation unit comprises an outer well pipe, a bin body arranged in the outer well pipe and a recharging well; the bin body comprises an anaerobic tank, an anoxic tank and an aerobic tank which are sequentially communicated from bottom to top; the outer well pipe is provided with a flower hole; the outer well pipe, the anaerobic tank, the anoxic tank, the aerobic tank and the recharging well form a sewage circulating waterway; aeration heads are arranged in the aerobic tank and the anoxic tank; the anaerobic tank, the anoxic tank and the aerobic tank are respectively provided with a microbial hanging film;
the sludge circulation unit comprises a sludge tank connected with the aerobic tank through a sludge pipe and a sludge pump arranged on the sludge pipe.
The aeration head is communicated with the aerator through an aeration pipeline; the aerator is arranged on the ground; the aeration pipeline is arranged in a gap between the outer well pipe and the bin body.
The anaerobic tank is communicated with the outer well pipe through an anaerobic tank water inlet pump; the anaerobic tank is communicated with the anaerobic tank through an anaerobic tank water inlet pipe and an anaerobic tank water inlet pump arranged on the anaerobic tank water inlet pipe; the anoxic tank is communicated with the aerobic tank through an aerobic tank water inlet pipe and an aerobic tank water inlet pump arranged on the aerobic tank water inlet pipe.
The aerobic tank is connected with the recharging well and the anoxic tank through an aerobic tank water outlet pump; the pipeline between the water outlet pump of the aerobic tank and the recharging well is a recharging pipe; and a pipeline between the water outlet pump of the aerobic tank and the anoxic tank is an aerobic tank return pipe.
The aerobic tank is connected with the anaerobic tank through a sludge return pipe.
And a reflux valve is arranged on the aerobic tank reflux pipe or the sludge reflux pipe.
The aeration pipeline is provided with a control valve.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the device for treating the underground water with the exceeding nitrogen and phosphorus is used for repairing the underground water with the exceeding nitrogen and phosphorus, the activated sludge method is used for repairing the type of pollutants, the biological treatment method is also good for the whole underground environment, and no secondary pollution of the underground environment caused by new pollutants is generated. The activated sludge process used in the method has stronger impact load resistance and greatly improves the removal rate of BOD, total phosphorus and total nitrogen. An outer well pipe is arranged outside the whole bin body, a closed-loop groundwater environment is formed between the outer well pipe and the bin body, and a stable water source of the anaerobic pool is maintained.
Drawings
FIG. 1 is a schematic diagram of the device for treating nitrogen and phosphorus standard exceeding groundwater by the activated sludge process.
Detailed Description
The present utility model will be described in further detail below with reference to the drawings and preferred embodiments, so that those skilled in the art can better understand the technical solutions of the present utility model.
FIG. 1 shows an activated sludge process device for treating nitrogen and phosphorus out-of-standard groundwater, comprising a sludge circulation unit and a sewage circulation unit; the sewage circulation unit comprises an outer well pipe 14, a bin body 24 arranged in the outer well pipe and a recharging well 15; the bin body comprises an anaerobic tank 23, an anoxic tank 22 and an aerobic tank 21 which are sequentially communicated from bottom to top; the outer well pipe is provided with a flower hole 10; the outer well pipe, the anaerobic tank, the anoxic tank, the aerobic tank and the recharging well form a sewage circulating waterway; aeration heads 11 are arranged in the aerobic tank and the anoxic tank; the anaerobic tank, the anoxic tank and the aerobic tank are respectively provided with a microbial hanging film 9;
the sludge circulation unit comprises a sludge tank 6 connected with the aerobic tank through a sludge pipe 2 and a sludge pump 3 arranged on the sludge pipe, and a pipeline between the sludge pump and the sludge tank is a sludge discharge pipe 5.
The aeration head 11 is communicated with the aerator 7 through an aeration pipeline 12; the aerator is arranged on the ground; the aeration pipeline is arranged in a gap between the outer well pipe and the bin body. The aeration pipeline is provided with a control valve 26.
The anaerobic tank is communicated with the outer well pipe through an anaerobic tank water inlet pump 13; the anoxic tank is communicated with the anaerobic tank through an anoxic tank water inlet pipe 20 and an anoxic tank water inlet pump 19 arranged on the anoxic tank water inlet pipe; the anoxic tank is communicated with the aerobic tank through an aerobic tank water inlet pipe 17 and an aerobic tank water inlet pump 18 arranged on the aerobic tank water inlet pipe.
The aerobic tank is connected with the recharging well 15 and the anoxic tank 22 through the aerobic tank water outlet pump 4; the pipeline between the water outlet pump of the aerobic tank and the recharging well is a recharging pipe 8; the pipeline between the water outlet pump of the aerobic tank and the anoxic tank is an aerobic tank return pipe 25.
The aerobic tank 21 is connected with the anaerobic tank 23 through a sludge return pipe 16. And a return valve 27 is arranged on the aerobic tank return pipe or the sludge return pipe. The water pump bracket 1 on the ground fixes various water pumps.
The implementation principle of the utility model is as follows: polluted underground water firstly enters a space between the outer well pipe 14 and the bin body 24 through the flower hole 10 of the outer well pipe, water is absorbed by the anaerobic tank water inlet pump 13 and enters the anaerobic tank 23, after the polluted underground water reacts in the anaerobic tank, water is absorbed by the anoxic tank water inlet pump 19 and enters the anoxic tank 22, after the anoxic tank reacts, water is absorbed by the aerobic tank water inlet pump 18 and enters the aerobic tank, after the polluted underground water reacts in the aerobic tank, part of supernatant after the reaction is returned to the upstream recharging well 15 through the aerobic tank water outlet pump 4, and the other part of supernatant is returned to the anoxic tank 22 through the aerobic tank return pipe.
The reaction principle is that the activated sludge is subjected to anaerobic reaction in the anaerobic tank (DO is less than 0.2 mg/L) for 1-2h to remove BOD in partial polluted groundwater, so that partial nitrogen-containing compounds are converted into N 2 The phosphorus is released by denitrification, and phosphorus-accumulating microorganisms (phosphorus accumulating bacteria and the like) in the return sludge of the sludge return pipe release phosphorus to meet the requirement of bacteria on the phosphorus. Then the sewage flows into the anoxic tank (DO is less than or equal to 0.5 mg/L), denitrifying bacteria in the tank reduce nitrate radical in the aerobic tank into N by using the carbon-containing organic matters which are not decomposed in the sewage as a carbon source and by internal circulation reflux 2 And released. The final sewage flows into the aerobic tank (DO is 2-4 mg/L) and NH in the water 3 And (3) performing nitration reaction on N (ammonia nitrogen) to generate nitrate, and simultaneously oxidizing and decomposing organic matters in water to supply energy to phosphorus-absorbing microorganisms, wherein the microorganisms absorb phosphorus from the water, the phosphorus enters cell tissues, is enriched in the microorganisms, and is discharged from a system in the form of phosphorus-rich sludge after precipitation and separation.
The reaction system mainly comprises two sets of reflux systems, one set is formed by refluxing sludge to an anaerobic tank to form a large external reflux well system; one set is to flow back to the anoxic tank from the aerobic tank to form a small internal reflux system. The internal reflux ratio is 100-200%, the external reflux ratio is 25-50%, and the reflux ratio is controlled by reflux valves on the pipelines.
The volume of the aerobic tank, the volume of the anoxic tank and the volume of the aerobic tank are mainly determined by the hydraulic retention time, the hydraulic retention time of the aerobic tank is 5-10 hours, the hydraulic retention time of the anoxic tank and the aerobic tank is 1-3 hours, and the water inlet and outlet of each position is controlled by a water pump. The diameter of the whole bin body is 50cm, and at least 30cm-40cm of space is reserved between the sleeve well and the bin body. The aeration quantity in the aerobic tank and the anoxic tank is controlled by a control valve arranged on an aeration pipeline.
The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.
Claims (7)
1. The device for treating the nitrogen and phosphorus exceeding underground water by the activated sludge method is characterized by comprising a sludge circulation unit and a sewage circulation unit;
the sewage circulation unit comprises an outer well pipe, a bin body arranged in the outer well pipe and a recharging well; the bin body comprises an anaerobic tank, an anoxic tank and an aerobic tank which are sequentially communicated from bottom to top; the outer well pipe is provided with a flower hole; the outer well pipe, the anaerobic tank, the anoxic tank, the aerobic tank and the recharging well form a sewage circulating waterway; aeration heads are arranged in the aerobic tank and the anoxic tank; the anaerobic tank, the anoxic tank and the aerobic tank are respectively provided with a microbial hanging film;
the sludge circulation unit comprises a sludge tank connected with the aerobic tank through a sludge pipe and a sludge pump arranged on the sludge pipe.
2. The device for treating nitrogen and phosphorus standard exceeding underground water by an activated sludge process according to claim 1, wherein the aeration head is communicated with the aerator through an aeration pipeline; the aerator is arranged on the ground; the aeration pipeline is arranged in a gap between the outer well pipe and the bin body.
3. The device for treating nitrogen and phosphorus standard exceeding underground water by an activated sludge process according to claim 1, wherein the anaerobic tank is communicated with the outer well pipe through an anaerobic tank water inlet pump; the anaerobic tank is communicated with the anaerobic tank through an anaerobic tank water inlet pipe and an anaerobic tank water inlet pump arranged on the anaerobic tank water inlet pipe; the anoxic tank is communicated with the aerobic tank through an aerobic tank water inlet pipe and an aerobic tank water inlet pump arranged on the aerobic tank water inlet pipe.
4. The device for treating nitrogen and phosphorus standard exceeding underground water by an activated sludge process according to claim 1, wherein the aerobic tank is connected with the recharging well and the anoxic tank through an aerobic tank water outlet pump; the pipeline between the water outlet pump of the aerobic tank and the recharging well is a recharging pipe; and a pipeline between the water outlet pump of the aerobic tank and the anoxic tank is an aerobic tank return pipe.
5. The device for treating nitrogen and phosphorus standard exceeding underground water by an activated sludge process according to claim 4, wherein the aerobic tank is connected with the anaerobic tank through a sludge return pipe.
6. The device for treating nitrogen and phosphorus standard exceeding groundwater by an activated sludge process according to claim 5, wherein a reflux valve is arranged on the reflux pipe of the aerobic tank or the reflux pipe of the sludge.
7. The device for treating nitrogen and phosphorus standard exceeding underground water by an activated sludge process according to claim 2, wherein the aeration pipeline is provided with a control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223284923.3U CN219507751U (en) | 2022-12-08 | 2022-12-08 | Device for treating nitrogen and phosphorus exceeding underground water by activated sludge process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223284923.3U CN219507751U (en) | 2022-12-08 | 2022-12-08 | Device for treating nitrogen and phosphorus exceeding underground water by activated sludge process |
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| CN219507751U true CN219507751U (en) | 2023-08-11 |
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| CN202223284923.3U Active CN219507751U (en) | 2022-12-08 | 2022-12-08 | Device for treating nitrogen and phosphorus exceeding underground water by activated sludge process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2022
- 2022-12-08 CN CN202223284923.3U patent/CN219507751U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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