Sewage treatment biochemical pool
By designing sewage treatment biochemical tanks in multifunctional zones and internal return channels, the problem of high sewage treatment cost under low inlet COD concentration is solved, and efficient sewage treatment and cost reduction is achieved.
Patent Information
- Application Number
- CN202421661735.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-15
AI Technical Summary
In sewage treatment plants, low COD concentration in water inlet leads to an increase in the operating burden of biochemical tanks, high raw material cost consumption, and it is difficult to ensure that the effluent water quality meets the standards.
A sewage treatment biochemical tank is designed, including selection zones, anaerobic zones, hypoxic zones, aerobic zones and multifunctional zones. Through the design of precise oxygen supply and internal return channels, the sewage treatment process is optimized and raw material investment is reduced.
The sewage treatment effect is improved under low water inlet COD concentration, reducing the waste of oxygen supply and COD, reducing raw material input and operating costs, and significantly improving the nitrogen removal and phosphorus removal effect.
Smart Images
Figure CN222922998U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment facilities, in particular to a sewage treatment biochemical pool. Background Technique
[0002] The biochemical pool is the main sewage treatment facility in the sewage treatment plant. During the sewage treatment process, if the COD concentration of the influent sewage is too low, it will increase the operation burden of the biochemical pool and increase the consumption of raw material costs when the biochemical pool treats sewage. For example, due to the incomplete rainwater and sewage diversion in the off-site municipal pipe network of Yibin Baisha Town Sewage Treatment Plant, the influent concentration has been too low. The influent COD concentration is 110-140mg / L during the winter dry season, and the influent COD concentration is less than 100mg / L during the rainy season flood season, and it often drops below 50mg / L. The influent B / C value is less than 0.3, and a large amount of sediment is accompanied, resulting in the yellowing of the activated sludge color. In order to ensure the compliance of the effluent quality, a large amount of carbon source needs to be used during the sewage treatment process, which leads to a high consumption of raw material costs. Therefore, this application provides a sewage treatment biochemical pool that does not require a large amount of raw materials to be put in under a low influent COD concentration and still can have a good treatment effect. Content of the Utility Model
[0003] In order to solve the above problems, this application provides a sewage treatment biochemical pool that does not require a large amount of carbon source to be put in under a low influent COD concentration and still can have a good treatment effect.
[0004] The purpose of the utility model is realized by the following technical solutions: A sewage treatment biochemical pool includes an air pipeline, an influent channel, a selection area and an anaerobic area arranged on one side of the influent channel, an anoxic area arranged on the other side of the influent channel and communicated with the anaerobic area, a first annular corridor of the aerobic area communicated with the anoxic area, a second annular corridor of the aerobic area communicated with the first annular corridor of the aerobic area, an end corridor of the aerobic area communicated with the second annular corridor of the aerobic area, a multi-functional area communicated with the end corridor of the aerobic area, and an effluent area communicated with the multi-functional area; the selection area, the anaerobic area and the anoxic area are respectively communicated with the influent channel through a first gate, a second gate and a third gate; the air pipeline is respectively communicated with the first annular corridor of the aerobic area, the second annular corridor of the aerobic area, the end corridor of the aerobic area and the multi-functional area.
[0005] Further, the air pipeline includes an air main pipe, a first air branch pipe communicating with the air main pipe and distributed along the end corridor of the aerobic zone, a second air branch pipe communicating with the first air branch pipe and distributed along the second annular corridor of the aerobic zone, a third air branch pipe communicating with the first air branch pipe and distributed along the first annular corridor of the aerobic zone, and a fourth air branch pipe communicating with the first air branch pipe and distributed along the multi-functional zone; several third aeration branch pipes and fourth aeration branch pipes respectively communicating with the first air branch pipe are sequentially arranged in the end corridor of the aerobic zone from its water inlet end to the water outlet end, several first aeration branch pipes respectively communicating with the third air branch pipe are arranged in the first annular corridor of the aerobic zone, several second aeration branch pipes respectively communicating with the second air branch pipe are arranged in the second annular corridor of the aerobic zone, and several fifth aeration branch pipes respectively communicating with the fourth air branch pipe are arranged in the multi-functional zone.
[0006] The water inlet ratio of the first gate, the second gate and the third gate is 1:1:0 to 0.2.
[0007] The ratio between the opening degrees of the valves on the first aeration branch pipe, the second aeration branch pipe, the third aeration branch pipe, the fourth aeration branch pipe and the fifth aeration branch pipe is 0:10:5:0.5:0.
[0008] An internal return channel is arranged at the upper end of the anoxic zone; the water inlet end of the internal return channel is communicated with the end corridor of the aerobic zone through an internal return pump, and its water outlet end is communicated with the anoxic zone; the internal return ratio of the internal return channel is 240%.
[0009] A partition wall is arranged in the anoxic zone.
[0010] An effluent overflow weir is arranged in the effluent zone.
[0011] Compared with the prior art, the present application has the following beneficial effects: The utility model provides precise oxygen supply for ammonia nitrogen degradation, reduces the waste of oxygen supply and COD, greatly improves the denitrification and phosphorus removal effects, and at the same time reduces the raw material input and lowers the cost.
[0012] Some additional features of the present application can be described below. Through the inspection of the following description and the corresponding drawings, or the understanding of the production or operation of the embodiments, some additional features of the present application are obvious to those skilled in the art. The features disclosed in the present application can be realized and achieved through the practice or use of various methods, means and combinations of the specific embodiments described below. Description of the Drawings
[0013] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation to the present application. In each figure, the same reference numerals represent the same components. Among them,
[0014] Figure 1 is a top view of the present utility model.
[0015] Figure 2 is Figure 1 a sectional view taken along line A-A in
[0016] Figure 3 is Figure 1 a sectional view taken along line B-B in
[0017] The reference numerals in the above-mentioned accompanying drawings are: 1 - inlet channel, 2 - selection area, 3 - anaerobic area, 4 - anoxic area, 5 - first annular corridor of aerobic area, 6 - second annular corridor of aerobic area, 7 - end corridor of aerobic area, 8 - multi-functional area, 9 - internal return channel, 10 - outlet area, 11 - outlet overflow weir, 12 - first gate, 13 - second gate, 14 - third gate, 15 - first aeration branch pipe, 16 - second aeration branch pipe, 17 - third aeration branch pipe, 18 - fourth aeration branch pipe, 19 - fifth aeration branch pipe, 20 - first air branch pipe, 21 - air main pipe, 22 - internal return pump, 23 - submersible mixer, 24 - second air branch pipe, 25 - third air branch pipe, 26 - fourth air branch pipe. Detailed Embodiments
[0018] In order to enable those skilled in the art of this technology to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.
[0019] Embodiment
[0020] As Figure 1 、 2 shown, this embodiment discloses a sewage treatment biochemical pool, which includes an air pipeline, an inlet channel 1, a selection area 2 and an anaerobic area 3 provided on one side of the inlet channel 1, an anoxic area 4 provided on the other side of the inlet channel 1 and communicating with the anaerobic area 3, a first annular corridor 5 of aerobic area communicating with the anoxic area 4, a second annular corridor 6 of aerobic area communicating with the first annular corridor 5 of aerobic area, an end corridor 7 of aerobic area communicating with the second annular corridor 6 of aerobic area, a multi-functional area 8 communicating with the end corridor 7 of aerobic area, and an outlet area 10 communicating with the multi-functional area 8.
[0021] The selection zone 2 is used for denitrification treatment of sewage, the anaerobic zone 3 is used for anaerobic phosphorus release treatment of sewage, the anoxic zone 4 is used to promote denitrification and organic matter decomposition of sewage, and the aerobic zone is used for the reaction of sewage with the added carrier.
[0022] Among them, the selection zone 2, the anaerobic zone 3 and the anoxic zone 4 are respectively connected to the water inlet channel 1 through the first gate 12, the second gate 13 and the third gate 14. That is, when the first gate 12, the second gate 13 and the third gate 14 are opened, the sewage in the water inlet channel 1 can enter the selection zone 2, the anaerobic zone 3 and the anoxic zone 4. In this embodiment, by adjusting the opening degrees of the first gate 12, the second gate 13 and the third gate 14, the water inlet ratio of the selection zone 2, the anaerobic zone 3 and the anoxic zone 4 is 1:1:0 to 0.2. Specifically, when setting, the water inlet ratio of the selection zone 2, the anaerobic zone 3 and the anoxic zone 4 is adjusted to 1:1:0, that is, the anoxic zone 4 does not receive water. The water flow direction is as Figure 1 shown by the arrow direction in
[0023] In addition, the air pipelines are respectively connected to the first annular corridor 5 of the aerobic zone, the second annular corridor 6 of the aerobic zone, the end corridor 7 of the aerobic zone and the multi-functional zone 8. Among them, the air pipelines include an air main pipe 21, a first air branch pipe 20 communicated with the air main pipe 21 and distributed along the end corridor 7 of the aerobic zone, a second air branch pipe 24 communicated with the first air branch pipe 20 and distributed along the second annular corridor 6 of the aerobic zone, a third air branch pipe 25 communicated with the first air branch pipe 20 and distributed along the first annular corridor 5 of the aerobic zone, and a fourth air branch pipe 26 communicated with the first air branch pipe 20 and distributed along the multi-functional zone 8.
[0024] Among them, a plurality of third aeration branch pipes 17 and a plurality of fourth aeration branch pipes 18 are connected to the first air branch pipe 20, and both the third aeration branch pipes 17 and the fourth aeration branch pipes 18 extend into the end corridor 7 of the aerobic zone; specifically, in this embodiment, 4 third aeration branch pipes 17 and 4 fourth aeration branch pipes 18 are provided, and the 4 third aeration branch pipes 17 and the 4 fourth aeration branch pipes 18 are evenly distributed in sequence from the water inlet end to the water outlet end of the first air branch pipe 20, that is, the 4 third aeration branch pipes 17 and the 4 fourth aeration branch pipes 18 are distributed along the end corridor 7 of the aerobic zone. In addition, a plurality of first aeration branch pipes 15 are connected to the third air branch pipe 25, and the first aeration branch pipes 15 extend into the first annular corridor 5 of the aerobic zone; specifically, in this embodiment, 10 first aeration branch pipes 15 are provided, and the 10 first aeration branch pipes 15 are distributed along the first annular corridor 5 of the aerobic zone. A plurality of second aeration branch pipes 16 are connected to the second air branch pipe 24, and the second aeration branch pipes 16 extend into the second annular corridor 6 of the aerobic zone; specifically, in this embodiment, 10 second aeration branch pipes 16 are provided, and the 10 second aeration branch pipes 16 are distributed along the second annular corridor 6 of the aerobic zone. A plurality of fifth aeration branch pipes 19 are connected to the fourth air branch pipe 26, and the fifth aeration branch pipes 19 extend into the multi-functional area 8; specifically, in this embodiment, 4 fifth aeration branch pipes 19 are provided, and the 4 fifth aeration branch pipes 19 are distributed along the multi-functional area 8.
[0025] Valves are provided on each of the first aeration branch pipe 15, the second aeration branch pipe 16, the third aeration branch pipe 17, the fourth aeration branch pipe 18 and the fifth aeration branch pipe 19, and the aeration volume of each aeration branch pipe can be adjusted by adjusting the opening degree of the valve. In this embodiment, the ratio between the opening degrees of the valves on the first aeration branch pipe 15, the second aeration branch pipe 16, the third aeration branch pipe 17, the fourth aeration branch pipe 18 and the fifth aeration branch pipe 19 is 0:10:5:0.5:0. For example, in this embodiment, the opening degree of the valves on the 10 first aeration branch pipes 15 in the first annular corridor 5 of the aerobic zone is 0%, that is, closed; the opening degree of the valves on the 10 second aeration branch pipes 16 in the second annular corridor 6 of the aerobic zone is 100%, that is, fully open; the opening degree of the valves on the 4 third aeration branch pipes 17 in the end corridor 7 of the aerobic zone is 50%, and the opening degree of the valves on the 4 fourth aeration branch pipes 18 is 5%; the opening degree of the valves on the 4 fifth aeration branch pipes 19 in the multi-functional area 8 is 0%, that is, closed.
[0026] In this embodiment, under the operation mode of the above-mentioned influent ratio and aeration ratio, precise oxygen supply is achieved, reducing the oxygen supply and COD waste in the first annular corridor 5 of the aerobic zone, enabling the sewage to still have a good treatment effect even when the influent COD concentration is low, and also reducing the usage amount of raw materials. Additionally, the opening degree of the valve on the fourth aeration branch pipe 18 is adjusted to be relatively small, while the valve on the fifth aeration branch pipe 19 is closed, enabling the multi-functional zone 8 to better deoxygenate and solving the problem of difficult deoxygenation in the multi-functional zone 8. At the same time, in this embodiment, the opening degree of the valve on the third aeration branch pipe 17 is 50%, which, while ensuring the deoxygenation effect of the multi-functional zone 8, can also avoid the situation of the fan on the air main pipe 21 being stuffy and surging due to its proximity to the air main pipe 21.
[0027] In addition, as Figure 1 , 3 shown, an internal return channel 9 is provided at the upper end of the anoxic zone 4. The inlet end of the internal return channel 9 is connected to the end corridor 7 of the aerobic zone through an internal return pump 22, and its outlet end is connected to the anoxic zone 4. That is, part of the sewage after biochemical treatment in the end corridor 7 of the aerobic zone flows back to the anoxic zone 4 for re-treatment. In this embodiment, the internal return ratio of the internal return channel 9 is 240%.
[0028] As Figure 1 shown, a partition wall is provided in the anoxic zone 4. The partition wall divides the anoxic zone 4 into two parts. The water flow perforations on the partition wall are misaligned with the inlet and outlet of the anoxic zone 4. The sewage needs to flow through the two parts in sequence before entering the first annular corridor 5 of the aerobic zone, which prolongs the residence time of the sewage in the anoxic zone 4 and thus reduces the amount of carbon source input.
[0029] In addition, an effluent overflow weir 11 is provided in the effluent zone 10.
[0030] In this embodiment, covers are provided on the tops of the selection zone 2, anaerobic zone 3, and anoxic zone 4, and deodorizing air ducts communicating with the outside are provided in the selection zone 2, anaerobic zone 3, and anoxic zone 4. In addition, flow guiding walls and submersible agitators 23 are provided in the first annular corridor 5 and the second annular corridor 6 of the aerobic zone, enabling the sewage to circulate in the first annular corridor 5 and the second annular corridor 6 of the aerobic zone to improve the biochemical reaction effect. During specific implementation, underwater stirrers and sludge discharge facilities can also be set in each area like a traditional biochemical pond, which will not be elaborated here.
[0031] When setting, each area can be set to two or more according to the situation, and they are symmetrically arranged respectively, as Figure 1 shown.
[0032] It should be noted that all features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.
[0033] In addition, the above specific embodiments are exemplary. Those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also fall within the scope of the disclosure of the present invention and within the protection scope of the present invention. Those skilled in the art should understand that the description and drawings of the present invention are illustrative and do not constitute a limitation to the claims. The protection scope of the present invention is defined by the claims and their equivalents.
Claims
1. A sewage treatment biochemical pool, characterized in that: The invention comprises an air pipeline, a water inlet channel (1), a selection zone (2) and an anaerobic zone (3) arranged on one side of the water inlet channel (1), an anoxic zone (4) arranged on the other side of the water inlet channel (1) and connected to the anaerobic zone (3), a first section annular corridor (5) of the aerobic zone connected to the anoxic zone (4), a second section annular corridor (6) of the aerobic zone connected to the first section annular corridor (5) of the aerobic zone, a terminal corridor (7) of the aerobic zone connected to the second section annular corridor (6) of the aerobic zone, and a second section annular corridor (8) of the aerobic zone connected to the first section annular corridor (5) of the aerobic zone. The multifunctional zone (8) is connected to the terminal corridor (7) of the aerobic zone, and the water outlet zone (10) is connected to the multifunctional zone (8); the selection zone (2), the anaerobic zone (3) and the anoxic zone (4) are respectively connected to the water inlet channel (1) through a first gate (12), a second gate (13) and a third gate (14); the air pipeline is respectively connected to the first section annular corridor (5) of the aerobic zone, the second section annular corridor (6) of the aerobic zone, the terminal corridor (7) of the aerobic zone and the multifunctional zone (8).
2. The sewage treatment biochemical pool according to claim 1, characterized in that: The air pipeline comprises an air main pipe (21), a first air branch pipe (20) connected to the air main pipe (21) and distributed along the terminal corridor (7) of the aerobic zone, a second air branch pipe (24) connected to the first air branch pipe (20) and distributed along the second section annular corridor (6) of the aerobic zone, a third air branch pipe (25) connected to the first air branch pipe (20) and distributed along the first section annular corridor (5) of the aerobic zone, and a fourth air branch pipe (26) connected to the first air branch pipe (20) and distributed along the multifunctional zone (8); the terminal corridor ( A plurality of third aeration branches (17) and a fourth aeration branch (18) are sequentially arranged from the water inlet end to the water outlet end thereof, the plurality of first aeration branches (15) are respectively arranged in the first section annular corridor (5) of the aerobic zone, the plurality of second aeration branches (16) are respectively arranged in the second section annular corridor (6) of the aerobic zone, the plurality of fifth aeration branches (19) are respectively arranged in the multifunctional zone (8), the plurality of fifth aeration branches (19) are respectively arranged in the fourth air branch (26).
3. The sewage treatment biochemical pool according to claim 2, characterized in that: The water inlet ratio of the first gate (12), the second gate (13) and the third gate (14) is 1:1:0-0.
2.
4. The sewage treatment biochemical pool according to claim 3, characterized in that: The ratio of the opening of the valve on the first aeration branch pipe (15), the opening of the valve on the second aeration branch pipe (16), the opening of the valve on the third aeration branch pipe (17), the opening of the valve on the fourth aeration branch pipe (18) and the opening of the valve on the fifth aeration branch pipe (19) is 0:10:5:0.5:
0.
5. The sewage treatment biochemical pool according to claim 1, characterized in that: An internal recirculation channel (9) is provided at the upper end of the anoxic zone (4); the water inlet end of the internal recirculation channel (9) is connected to the aerobic zone terminal gallery (7) through an internal recirculation pump (22), and the water outlet end thereof is connected to the anoxic zone (4); the internal recirculation ratio of the internal recirculation channel (9) is 240%.
6. The sewage treatment biochemical pool according to claim 1, characterized in that: A partition wall is provided in the anoxic zone (4).
7. The sewage treatment biochemical pool according to claim 1, characterized in that: A water outlet overflow weir (11) is provided in the water outlet area (10).