CN210048626U - Sewage treatment device for enhancing biological nitrogen and phosphorus removal - Google Patents
Sewage treatment device for enhancing biological nitrogen and phosphorus removal Download PDFInfo
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- CN210048626U CN210048626U CN201920519268.4U CN201920519268U CN210048626U CN 210048626 U CN210048626 U CN 210048626U CN 201920519268 U CN201920519268 U CN 201920519268U CN 210048626 U CN210048626 U CN 210048626U
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Abstract
The utility model discloses a sewage treatment plant of intensive biological nitrogen and phosphorus removal, it includes anaerobism pond, good oxygen pond, oxygen deficiency pond, two heavy ponds and equipment rooms in proper order, be provided with the inlet tube on the intake pump, the inlet tube is connected with anaerobism branch pipe of intaking and oxygen deficiency pond branch pipe respectively, anaerobism branch pipe of intaking is connected with anaerobism pond top, oxygen deficiency pond branch pipe of intaking is connected with oxygen deficiency pond top, be provided with the membrane module in the good oxygen pond, the membrane module is connected with the siphon pump, siphon pump and oxygen deficiency pond branch pipe connection of intaking, good oxygen bottom of the pool portion is provided with the aeration dish, the aeration dish is connected with the air-blower, good oxygen bottom of the pool portion is connected with ① # sludge reflux pump through one-level sludge pipe, two heavy bottoms of the pools are connected with # sludge reflux pump through second grade sludge pipe and # ②.
Description
Technical Field
The utility model relates to the field of wastewater treatment, in particular to a sewage treatment device for strengthening biological nitrogen and phosphorus removal.
Background
Nitrogen and phosphorus are main reasons for eutrophication of water bodies, and the national regulations and controls on the discharge standards of the water bodies are increasingly strict nowadays. The total phosphorus can be removed well by adding chemical agents, but the operation cost is increased at the same time. In addition to this, the location of the dose is also of critical importance. If the medicament is added into an aeration tank, the long-term accumulation of chemical sludge inevitably causes certain influence on a biochemical system. If a coagulating sedimentation tank is additionally arranged, the land area and the investment and construction cost are increased. Therefore, chemical phosphorus removal is only an expedient design, and the enhanced biochemical phosphorus removal is the development trend in the future. The total phosphorus can be removed by chemical methods, however, the total nitrogen removal must be accomplished by biochemical systems.
But A is
2The traditional processes such as O and the like have poor removal effects on total nitrogen and total phosphorus, and have two main reasons: (1) in the traditional activated sludge method, the two processes of denitrification and dephosphorization are not completely separated, and the same sludge discharge system is still adopted. In order to ensure the dephosphorization effect, the sludge discharge frequency must be increased, and in order to ensure the total nitrogen removal effect, the sludge age must be increased, so that certain contradiction exists between the two processes;
(2) in the traditional activated sludge process, the nitrifying liquid in the aerobic tank generally flows back to the anaerobic tank or the anoxic tank. When the nitrified liquid flows back to the anaerobic tank, a large amount of nitrate (nitrite) and a part of dissolved oxygen are carried by the nitrified liquid (the water drop phenomenon also contributes to part of the dissolved oxygen), and the anaerobic phosphorus release process of the phosphorus accumulating bacteria can be inhibited to a certain extent. When the wastewater flows back to the anoxic tank, the existence of dissolved oxygen can destroy the anoxic environment to a certain extent, inhibit denitrification reaction, and consume a part of organic matters to ensure that the carbon source is deficient.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a sewage treatment device for strengthening biological nitrogen and phosphorus removal, which is relatively traditional A
2The removal effects of the O process, total nitrogen and total phosphorus are expected to be respectively improved by 50% and 60%.
In order to achieve the purpose, the utility model relates to a sewage treatment device for strengthening biological nitrogen and phosphorus removal, which comprises an anaerobic tank, an aerobic tank, an anoxic tank, a secondary sedimentation tank and an equipment room in sequence, wherein a water inlet pump, an air blower, a No. ① sludge reflux pump and a No. ② sludge reflux pump are arranged in the equipment room, the water inlet pump is provided with a water inlet pipe, the water inlet pipe is respectively connected with an anaerobic water inlet branch pipe and an anoxic tank water inlet branch pipe, the anaerobic water inlet branch pipe is connected with the top of the anaerobic tank, the anoxic tank water inlet branch pipe is connected with the top of the anoxic tank, a membrane component is arranged in the aerobic tank, the membrane component is connected with a siphon pump, the siphon pump is connected with the anoxic tank water inlet branch pipe, the bottom of the aerobic tank is provided with an aeration disc, the aeration disc is connected with the air blower, the bottom of the aerobic tank is connected with the No. ① sludge reflux pump through a primary sludge pipe, the bottom of the secondary sedimentation tank is connected with the No. ② sludge reflux pump through a secondary reflux pipe, and the top of the anaerobic tank through a secondary reflux pipe.
Further, still set up the dosing pump in the equipment room, the dosing pump is connected with oxygen deficiency pond water inlet branch pipe through adding the pencil, be provided with the medicine valve on the pencil.
And furthermore, stirrers are arranged on the anaerobic tank and the anoxic tank.
And furthermore, water inlet valves are arranged on the anaerobic water inlet branch pipe and the anoxic tank water inlet branch pipe.
And furthermore, a sludge discharge valve is arranged on each of the primary sludge pipe and the secondary sludge pipe.
And furthermore, return valves are arranged on the secondary return pipe and the primary return pipe.
Still further, an aeration valve is arranged on a pipeline between the aeration disc and the blower.
And furthermore, a siphon valve is arranged on a pipeline between the siphon pump and the water inlet branch pipe of the anoxic pond.
The function of the device is as follows:
1) the sewage is distributed to an anaerobic tank and an anoxic tank by a water inlet pump; realizing multi-point water inlet.
2) Besides a certain interception effect on phosphorus accumulating bacteria, the membrane component is arranged in the aerobic tank, the sludge discharge frequency of the phosphorus removal unit is independently controlled through the sludge discharge valve at the bottom, the total phosphorus removal effect is enhanced, the residual sludge in the aerobic tank flows back to the anaerobic tank through the No. ① sludge reflux pump, and meanwhile, the nitrifying liquid in the aerobic tank is lifted to the anoxic tank through the siphon pump, so that the content of dissolved oxygen carried in the nitrifying liquid is reduced, and the anoxic environment is ensured.
3) Residual sludge at the bottom of the secondary sedimentation tank flows back to the anoxic tank by a No. ② sludge return pump, so that the sludge age of denitrifying bacteria is increased;
the utility model has the advantages that:
(1) the aerobic tank has the functions of an aerobic section and a secondary sedimentation tank, has a certain interception effect on phosphorus accumulating bacteria, can realize independent control of sludge discharge frequency, enhances the total phosphorus removal effect and does not influence the total nitrogen removal;
(2) the effluent of the aerobic tank does not pass through the anaerobic section, so that conditions favorable for anaerobic phosphorus release of phosphorus accumulating bacteria are created, and the total phosphorus removal effect is enhanced;
(3) the effluent in the aerobic tank is pumped into the anoxic tank through the siphon pump, the concentration of dissolved oxygen is relatively low, drop reoxygenation is avoided, and the anoxic environment is ensured to a certain extent, so that the total nitrogen removal effect is enhanced;
(4) the sludge intercepted by the secondary sedimentation tank flows back to the anoxic tank, so that the sludge age of denitrifying bacteria is increased, and the total nitrogen removal effect is enhanced;
in summary, the following steps: the utility model discloses an automatic multiple spot is intake, can guarantee into water evenly distributed anaerobic section and anaerobic section, and the throwing of extra carbon source has been saved to the carbon source in can make full use of sewage.
Drawings
FIG. 1 is a schematic structural diagram of a sewage treatment plant for enhanced biological nitrogen and phosphorus removal;
in the figure, an anaerobic tank 1, an aerobic tank 2, an anoxic tank 3, a secondary sedimentation tank 4, a device room 5, a water inlet pump 6, a blower 7, a No. ① sludge reflux pump 8, a No. ② sludge reflux pump 9, a water inlet pipe 10, an anaerobic water inlet branch pipe 10.1, an anoxic tank water inlet branch pipe 10.2, a membrane component 11, a siphon pump 12, a siphon valve 12.1, an aeration disc 13, a primary sludge pipe 14, a secondary sludge pipe 15, a secondary reflux pipe 16, a primary reflux pipe 17, a dosing pump 18, a dosing pipe 19, a dosing valve 19.1, a stirrer 20, a water inlet valve 21, a mud discharge valve 22, a reflux valve 23, an aeration valve 24, a sludge pump, a sludge,
Is the direction of the water flow.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments for the understanding of those skilled in the art.
The sewage treatment device for enhancing biological nitrogen and phosphorus removal as shown in figure 1 sequentially comprises an anaerobic tank 1, an aerobic tank 2, an anoxic tank 3, a secondary sedimentation tank 4 and an equipment room 5, wherein stirrers 20 are respectively arranged on the anaerobic tank 1 and the anoxic tank 3, a water inlet pump 6, a blower 7, an ① sludge reflux pump 8, a ② sludge reflux pump 9 and a dosing pump 18 are arranged in the equipment room 5,
the water inlet pump 6 is provided with a water inlet pipe 10, the water inlet pipe 10 is respectively connected with an anaerobic water inlet branch pipe 10.1 and an anoxic pond water inlet branch pipe 10.2, the anaerobic water inlet branch pipe 10.1 is connected with the top of the anaerobic pond 1, the anoxic pond water inlet branch pipe 10.2 is connected with the top of the anoxic pond 3, and the anaerobic water inlet branch pipe 10.1 and the anoxic pond water inlet branch pipe 10.2 are both provided with a water inlet valve 21;
a membrane component 11 is arranged in the aerobic tank 2, the membrane component 11 is connected with a siphon pump 12, the siphon pump 12 is connected with a water inlet branch pipe 10.2 of the anoxic tank, and a siphon valve 12.1 is arranged on a pipeline between the siphon pump 12 and the water inlet branch pipe 10.2 of the anoxic tank;
an aeration disc 13 is arranged at the bottom of the aerobic tank 2, the aeration disc 13 is connected with the blower 7, and an aeration valve 24 is arranged on a pipeline between the aeration disc 13 and the blower 7;
the bottom of the aerobic tank 2 is connected with a No. ① sludge reflux pump 8 through a primary sludge pipe 14, the bottom of the secondary sedimentation tank 4 is connected with a No. ② sludge reflux pump 9 through a secondary sludge pipe 15, the primary sludge pipe 14 and the secondary sludge pipe 15 are both provided with sludge discharge valves 22, the No. ② sludge reflux pump 9 is connected with the top of the anoxic tank 3 through a secondary reflux pipe 16, the No. ① sludge reflux pump 8 is connected with the top of the anaerobic tank 1 through a primary reflux pipe 17, the secondary reflux pipe 16 and the primary reflux pipe 17 are both provided with reflux valves 23, the dosing pump 18 is connected with a water inlet branch pipe 10.2 of the anoxic tank through a dosing pipe 19, and the dosing pipe 19 is provided with a dosing valve 19.1.
According to the actual conditions, the anaerobic tank and the anoxic tank are filled with water in an upper inlet and a lower outlet, and a row of 8 water outlet holes are formed in the position 15cm away from the bottom of the right side wall of the anaerobic tank and the anoxic tank.
The working process of the sewage treatment device for enhancing biological nitrogen and phosphorus removal comprises the following steps:
1) sewage is uniformly distributed to the anaerobic tank 1 and the anoxic tank 3 by the water inlet pump 6, so that multi-point water inlet is realized, and in normal operation, mechanical stirring devices and water inlet valves of the anaerobic tank and the anoxic tank are normally opened;
2) under the normal operation condition, a sludge discharge valve 22 and a No. ① sludge reflux pump 8 of the aerobic pool 2 are in a closed state, when sludge is required to be discharged, aeration is closed, and after sedimentation is carried out for a certain time, sludge discharge and sludge reflux processes are carried out, and the sedimentation time and the sludge discharge frequency are determined according to the field condition;
3) the effluent of the aerobic tank 2 is lifted to the anoxic tank 3 by the siphon pump 12, the flow rate is adjusted according to the water inlet condition, the carbon source is added to the anoxic tank 3 by the dosing pump 18, and the adding amount is determined according to the water quality of the influent water and the equipment running condition;
4) the water inlet mode of the anoxic tank is upward inlet and downward outlet, the muddy water mixed liquor enters the secondary sedimentation tank 4 from the bottom, the residual sludge at the bottom of the secondary sedimentation tank flows back to the anoxic tank 3 through a No. ② sludge return pump 9, the return pump is normally open, and the return amount is adjusted in real time according to the field condition;
compared with the traditional A, the sewage treatment process of the device
2The removal effects of the O process, total nitrogen and total phosphorus are expected to be respectively improved by 50% and 60%.
Other parts not described in detail are prior art. Although the above embodiments have been described in detail, it is only a part of the embodiments of the present invention, rather than all embodiments, and other embodiments can be obtained without inventive step according to the present embodiments.
Claims (8)
1. A sewage treatment device for enhancing biological nitrogen and phosphorus removal is characterized by sequentially comprising an anaerobic tank (1), an aerobic tank (2), an anoxic tank (3), a secondary sedimentation tank (4) and an equipment room (5), wherein a water inlet pump (6), an air blower (7), a No. ① sludge reflux pump (8) and a No. ② sludge reflux pump (9) are arranged in the equipment room (5), a water inlet pipe (10) is arranged on the water inlet pump (6), the water inlet pipe (10) is respectively connected with an anaerobic water inlet branch pipe (10.1) and an anoxic tank water inlet branch pipe (10.2), the anaerobic water inlet branch pipe (10.1) is connected with the top of the anaerobic tank (1), the anoxic tank water inlet branch pipe (10.2) is connected with the top of the anoxic tank (3), a membrane module (11) is arranged in the aerobic tank (2), the siphon pump (12) is connected with the anoxic tank water inlet branch pipe (10.2), the aerobic sludge reflux tank (13) is connected with the aerobic sludge reflux tank (369), the aerobic aeration disc (13) is connected with the secondary sedimentation tank (368), and the aerobic sludge reflux pump (369) is connected with the secondary sedimentation tank (368) through a first-stage sludge reflux pump (368) and a second-stage sludge reflux pump (369).
2. The enhanced biological nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein: still set up dosing pump (18) in equipment room (5), dosing pump (18) are connected with oxygen deficiency pond water inlet branch pipe (10.2) through dosing pipe (19), be provided with on dosing pipe (19) and add medicine valve (19.1).
3. The enhanced biological nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein: the anaerobic tank (1) and the anoxic tank (3) are both provided with stirrers (20).
4. The enhanced biological nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein: and the anaerobic water inlet branch pipe (10.1) and the anoxic tank water inlet branch pipe (10.2) are respectively provided with a water inlet valve (21).
5. The enhanced biological nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein: and the primary sludge pipe (14) and the secondary sludge pipe (15) are both provided with a sludge discharge valve (22).
6. The enhanced biological nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein: and the secondary return pipe (16) and the primary return pipe (17) are both provided with return valves (23).
7. The enhanced biological nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein: an aeration valve (24) is arranged on a pipeline between the aeration disc (13) and the blower (7).
8. The enhanced biological nitrogen and phosphorus removal sewage treatment plant according to claim 1, wherein: a siphon valve (12.1) is arranged on a pipeline between the siphon pump (12) and the water inlet branch pipe (10.2) of the anoxic pond.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821478017 | 2018-09-10 | ||
| CN2018214780178 | 2018-09-10 |
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| Publication Number | Publication Date |
|---|---|
| CN210048626U true CN210048626U (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920519268.4U Active CN210048626U (en) | 2018-09-10 | 2019-04-16 | Sewage treatment device for enhancing biological nitrogen and phosphorus removal |
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| CN (1) | CN210048626U (en) |
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- 2019-04-16 CN CN201920519268.4U patent/CN210048626U/en active Active
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