CN212375002U - Biochemical pool based on two processes operation - Google Patents
Biochemical pool based on two processes operation Download PDFInfo
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- CN212375002U CN212375002U CN202020098311.7U CN202020098311U CN212375002U CN 212375002 U CN212375002 U CN 212375002U CN 202020098311 U CN202020098311 U CN 202020098311U CN 212375002 U CN212375002 U CN 212375002U
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Abstract
The utility model provides a biochemical pond based on two kinds of technology operation, including the inlet channel that connects gradually, in advance the oxygen deficiency pond, anaerobic zone, oxygen deficiency pond, good oxygen pond to and relevant two heavy ponds of structure, mud pump house of handling with it. The utility model provides a biochemical pool which realizes the water inflow and the external sludge backflow at different points by adjusting the switching of a weir gate and a valve according to the different biochemical degrees of the water inflow; the reflux pumps in different areas are started to control the internal reflux among different functional areas of the biochemical pool, thereby realizing A-A2The switching of the two biological treatment modes of the/O and the UCT can effectively improve the corresponding capability of the biochemical tank to different water qualities of inlet water, ensure the effect of biological nitrogen and phosphorus removal, and can be used for treating municipal sewageThe field of management is popularized and used.
Description
Technical Field
The utility model belongs to the technical field of municipal administration sewage treatment and specifically relates to a biochemical pond based on two kinds of activated sludge treatment process operation.
Background
With the deep research on the water environment treatment, the discharge standard of nitrogen and phosphorus in urban sewage treatment plants becomes more and more strict. Municipal sewage is generally treated by adopting a traditional activated sludge treatment process, and biological denitrification and biological phosphorus removal influence each other in aspects of fighting for easily degradable organic matters in the sewage, the sludge age of the activated sludge and the like. In order to solve the above contradictions and optimize the denitrification and dephosphorization effects, people have been dedicated to promoting the development of denitrification and dephosphorization technology and deriving a plurality of biological treatment processes, such as common A2Process for the production of a catalyst2an/O process, a multi-stage A-O process, a UCT, and an improved UCT process.
A2the/O process is suitable for sewage with a relatively high C/N, C/P ratio. The organic matters contain more easily degradable components, and even if part of the easily biodegradable organic matters are consumed by the nitrate nitrogen in the returned sludge, enough easily degradable organic matters are still used by the phosphorus releasing bacteria, so that the phosphorus removal effect is not influenced.
A-A2The pre-anoxic tank is arranged in front of the anaerobic zone of the/O process, so that nitrate nitrogen in the returned sludge is removed, and the residual small amount of nitrate nitrogen enters the anaerobic zone without influencing the requirement of biological phosphorus removal on a carbon source. Raw water is fed at multiple points, 10-20% of sewage enters the pre-anoxic tank, and 90-80% of sewage enters the anaerobic zone, so that the requirement of nitrogen and phosphorus removal on a carbon source is further ensured, and a good nitrogen and phosphorus removal effect is achieved.
However, the wastewater has low influent concentration, less carbon source and poor biodegradability due to various factors, such as partial industrial wastewater with poor biodegradability entering, low water quality concentration due to groundwater infiltration in southern areas, low influent amount and low water quality at the initial stage of wastewater treatment plant construction, and low C/N, C/P ratio. The organic matters have insufficient easily degradable components, nitrate nitrogen in the return sludge has obvious interference on phosphorus removal, and the problem of interference of the nitrate nitrogen in the return sludge on phosphorus removal is effectively solved by the common UCT process at present. When the C/N of the raw water is less than 4 and the C/P is less than 20, the phosphorus removal effect of the UCT process is obviously better than that of A2The process is carried out by adopting a/O technology.
The main improvement of the UCT process is that the sludge flows back to the anoxic tank instead of the anaerobic zone, the mixed liquor in the anoxic tank flows back to the anaerobic zone, the returned sludge and the nitrified liquor returned by the aerobic tank are subjected to denitrification in the anoxic tank, no nitrate nitrogen exists when the returned sludge and the nitrified liquor enter the anaerobic zone, and the phosphorus removal is not adversely affected.
SUMMERY OF THE UTILITY MODEL
In order to the above situation, the utility model provides a biochemical pond based on two kinds of technology operation, single technology is improved in biochemical pond of traditional active sludge, a biochemical pond of realizing two kinds of technology operations of A-A2/O and UCT is provided, in same biochemical pond, according to the difference of the biochemical degree of intaking, through the switching of valve and regulation weir gate, the intake and the mud external reflux of different positions are realized, open different regional backwash pump, the internal reflux between the different functional areas in the biochemical pond of control, thereby realize A-A2Switching between two biological treatment modes of/O and UCT.
The utility model adopts the technical proposal that: a biochemical pool operating based on two processes is characterized by comprising a water inlet channel, a pre-anoxic pool, an anaerobic zone, an anoxic pool, an aerobic pool, a secondary sedimentation pool and a sludge pump room which are connected in sequence;
a first adjusting weir gate is arranged on one side of the pre-anoxic pond, a second adjusting weir gate is arranged on one side of the anaerobic zone, and the water inlet channel is connected with the anoxic pond and the anaerobic zone through the first adjusting weir gate and the second adjusting weir gate respectively;
a first valve is arranged on one side of the pre-anoxic tank, a second valve is arranged on one side of the front section of the anoxic tank, and an external reflux sludge pipe which is simultaneously connected with the first valve and the second valve is arranged on the sludge pump room;
a first backflow pump set is arranged on one side, close to the anaerobic zone, of the anoxic tank, the outlet end of the first backflow pump set is located in the anaerobic tank, and the inlet end of the first backflow pump set is located in the anoxic tank;
the terminal second return-flow pump group that is equipped with of good oxygen pond, second return-flow pump group entry end is connected with good oxygen pond, second return-flow pump group exit end is equipped with the backward flow channel, the backward flow channel is connected through the third regulation weir gate with the oxygen deficiency pond, good oxygen pond still is equipped with the outlet pipe that links to each other with the heavy pond of follow-up structure two.
Preferably, a water inlet pipe is arranged on one side of the water inlet channel.
Preferably, a stirrer is arranged in the pre-anoxic tank.
Preferably, a flow impeller and a flow guide wall are arranged in the anaerobic zone and the anoxic tank.
Preferably, the front section of the anoxic tank is also provided with an external carbon source adding port.
Preferably, a tube membrane aerator is arranged in the aerobic tank.
Preferably, the tube membrane aerator is provided with an external access air pipe connected with the tube membrane aerator.
The utility model discloses the beneficial effect who has does:
(1) the biochemical pool of the utility model can realize the operation of two processes according to the change of the biochemical index of the inlet water;
(2) the utility model can improve the coping ability of the biochemical pool to different water quality of inlet water;
(3) the utility model discloses extensive popularization nature has.
Drawings
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 shows the utility model A-A2A schematic plan view of a biochemical tank for operation of the/O process;
FIG. 3 is a schematic plan view of a biochemical tank for UCT process operation according to the present invention;
FIG. 4 is A-A2a/O process flow diagram;
fig. 5 is a process flow diagram of a UCT process.
In the figure: 1 water inlet channel, 1.1 water inlet pipe, 2 pre-anoxic pond, 2.1 first adjusting weir gate, 2.2 first valve, 2.3 stirrer, 3 anaerobic zone, 3.1 second adjusting weir gate, 3.2 first reflux pump set, 3.3 impeller, 3.4 guide wall, 4 anoxic pond, 4.1 third adjusting weir gate, 4.2 second valve, 4.3 external carbon source feeding port, 5 aerobic pond, 5.1 second reflux pump set, 5.2 reflux channel, 5.3 air pipe, 5.4 aeration pipe, 5.5 water outlet pipe, 6 secondary sedimentation tank, 7 sludge pump room, 7.1 external reflux sludge pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention will be combined below to clearly and completely describe the technical solutions of the present invention.
The utility model discloses specific embodiment as follows:
as shown in FIG. 2, when the biodegradability of inlet water is good, i.e. C/N > 4, and C/P > 20, A-A is used2the/O process mode is operated. Sewage is fed simultaneously by two points (a first adjusting weir gate 2.1 and a second adjusting weir gate 3.1 are opened), the opening degree of the adjusting weir gates is controlled (the opening degree of the first adjusting weir gate 2.1 is 10% -20%, the opening degree of the second adjusting weir gate 3.1 is 90% -80%), so that the water in the pre-anoxic tank 2 is fed by 10% -20% Q, the water in the anaerobic zone 3 is fed by 90% -80% Q, then the water flow sequentially passes through the anaerobic zone 3 and the anoxic tank 4, and finally the water flows out of the aerobic tank 5 to the secondary sedimentation tank 6. The external return sludge is opened through a first valve 2.2 so that 50-100% Q of the return sludge flows back to the pre-anoxic tank 2. The opening numbers of the third adjusting weir gate 4.1 and the second reflux pump set 5.1 are controlled, so that 100-200% Q of the nitrified liquid in the aerobic tank 5 flows back to the front section of the anoxic tank 4, and the specific flow is shown in FIG. 4.
As shown in FIG. 3, when the biodegradability of the inlet water is poor, i.e. C/N is less than 4 and C/P is less than 20, the operation is carried out by adopting a UCT process mode. Sewage is totally entered from the pre-anoxic tank 2 (the first adjusting weir gate 2.1 is completely opened) and combined with the anaerobic zone 3 (the second adjusting weir gate 3.1 is closed) to form a large anaerobic zone, and water flows sequentially pass through the anaerobic zone 3 and the anoxic tank 4 and finally flows out from the aerobic tank 5 to the secondary sedimentation tank 6. The external return sludge enables 50-100% Q of return sludge to flow back to the front section of the anoxic tank 4 by controlling the opening degree of a second valve (4.2). The nitrification liquid of the aerobic tank 5 flows back to the front section of the anoxic tank 4 within 100 to 200 percent of Q by controlling and adjusting the opening number of the third adjusting weir gate 4.1 and the second reflux pump set 5.1. Meanwhile, the mixed liquor in the anoxic tank 4 flows back to the anaerobic zone 3 by 100% Q of the mixed liquor through the opening of the first reflux pump group 3.2. The front section of the anoxic tank 4 is provided with a medicine adding port, and when the carbon source is extremely insufficient, medicines such as sodium acetate and the like are added to supplement the carbon source. The specific flow is shown in fig. 5.
Claims (7)
1. A biochemical pool operating based on two processes is characterized by comprising a water inlet channel (1), a pre-anoxic pool (2), an anaerobic zone (3), an anoxic pool (4), an aerobic pool (5), a secondary sedimentation pool (6) and a sludge pump room (7) which are connected in sequence;
a first adjusting weir gate (2.1) is arranged on one side of the pre-anoxic tank (2), a second adjusting weir gate (3.1) is arranged on one side of the anaerobic zone (3), and the water inlet channel (1) is connected with the pre-anoxic tank (2) and the anaerobic zone (3) through the first adjusting weir gate (2.1) and the second adjusting weir gate (3.1) respectively;
a first valve (2.2) is arranged on one side of the pre-anoxic tank (2), a second valve (4.2) is arranged on one side of the front section of the anoxic tank (4), and an external reflux sludge pipe (7.1) which is simultaneously connected with the first valve (2.2) and the second valve (4.2) is arranged on the sludge pump room (7);
a first reflux pump set (3.2) is arranged on one side of the anoxic tank (4) close to the anaerobic zone (3), the outlet end of the first reflux pump set (3.2) is positioned in the anaerobic zone (3), and the inlet end of the first reflux pump set (3.2) is positioned in the anoxic tank (4);
the terminal second return-flow pump group (5.1) that is equipped with of good oxygen pond (5), second return-flow pump group (5.1) entry end is connected with good oxygen pond (5), second return-flow pump group (5.1) exit end is equipped with backward flow channel (5.2), backward flow channel (5.2) are connected through third regulation weir gate (4.1) with oxygen deficiency pond (4), good oxygen pond (5) water outlet end still is equipped with outlet pipe (5.5) continuous with follow-up structure secondary sedimentation tank (6).
2. A biochemical tank operating on two processes according to claim 1, characterized in that: one side of the water inlet channel (1) is provided with a water inlet pipe (1.1).
3. A biochemical tank operating on two processes according to claim 1, characterized in that: a stirrer (2.3) is arranged in the pre-anoxic tank (2).
4. A biochemical tank operating on two processes according to claim 1, characterized in that: and flow impellers (3.3) and flow guide walls (3.4) are arranged in the anaerobic zone (3) and the anoxic tank (4).
5. A biochemical tank operating on two processes according to claim 1, characterized in that: the front section of the anoxic tank (4) is also provided with an external carbon source adding port (4.3).
6. A biochemical tank operating on two processes according to claim 1, characterized in that: a tube membrane aerator (5.4) is arranged in the aerobic tank (5).
7. A biochemical tank operating based on two processes according to claim 6, characterized in that: the tube membrane aerator (5.4) is provided with an external access air pipe (5.3) connected with the tube membrane aerator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020098311.7U CN212375002U (en) | 2020-01-16 | 2020-01-16 | Biochemical pool based on two processes operation |
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| CN202020098311.7U CN212375002U (en) | 2020-01-16 | 2020-01-16 | Biochemical pool based on two processes operation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114988579A (en) * | 2022-07-12 | 2022-09-02 | 北京安国水道自控工程技术有限公司 | Device and method for optimal control of biological denitrification process of sewage treatment plant |
| CN115432820A (en) * | 2022-08-24 | 2022-12-06 | 中核四0四有限公司 | Sewage treatment method and system |
| CN116903139A (en) * | 2023-08-24 | 2023-10-20 | 宇星环保工程有限公司 | Multistage water inlet multistage AO system suitable for sewage treatment plant reconstruction and control method |
-
2020
- 2020-01-16 CN CN202020098311.7U patent/CN212375002U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114988579A (en) * | 2022-07-12 | 2022-09-02 | 北京安国水道自控工程技术有限公司 | Device and method for optimal control of biological denitrification process of sewage treatment plant |
| CN115432820A (en) * | 2022-08-24 | 2022-12-06 | 中核四0四有限公司 | Sewage treatment method and system |
| CN115432820B (en) * | 2022-08-24 | 2023-07-21 | 中核四0四有限公司 | Sewage treatment method and system |
| CN116903139A (en) * | 2023-08-24 | 2023-10-20 | 宇星环保工程有限公司 | Multistage water inlet multistage AO system suitable for sewage treatment plant reconstruction and control method |
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