Embedded type biochemical treatment device of CSO regulation and storage tank

Abstract

The utility model provides an embedded biochemical treatment device for a CSO regulation and storage tank, and belongs to the field of rainwater treatment.The embedded biochemical treatment device for the CSO regulation and storage tank comprises a grating, the CSO regulation and storage tank, a physicochemical treatment unit, an environment monitoring unit and a control unit which are sequentially connected; besides, biological stuffing is arranged in a cavity of the CSO regulation and storage tank, a plurality of spraying devices are arranged at the top end of the CSO regulation and storage tank, and an ultra-nano gas dissolution and reoxygenation system is arranged in the aerobic tank; according to the present invention, the activity of the microorganisms in the CSO regulation and storage tank is controlled in real time, such that the overflow water can be subjected to timely biochemical treatment, such that the functions of the regulation and storage tank are diversified so as to achieve the efficient treatment of the overflow water.

Description

Technical Field

[0001] The present application relates to the technical field of rainwater treatment, and in particular to an embedded biochemical treatment device in a CSO storage tank. Background Art

[0002] If overflow water from CSO storage tanks is discharged directly into receiving water bodies without treatment, it can easily pollute the receiving water bodies. Therefore, overflow water from CSO storage tanks often needs to be treated to meet standards before being discharged. Furthermore, the large amount of space within storage tanks is generally used solely for rainwater storage, resulting in limited economic benefits.

[0003] In view of this, it is necessary to design an embedded biochemical treatment device in the CSO storage tank to solve the above problems. Utility Model Content

[0004] In view of the technical problems existing in the background technology, the present application provides an embedded biochemical treatment device for a CSO regulating reservoir, which can reduce COD and ammonia nitrogen in overflow water so that the overflow water can meet discharge standards after treatment.

[0005] The embodiment of the present application provides a CSO storage tank embedded biochemical treatment device, comprising: a grid, a CSO storage tank, and a physicochemical treatment unit connected in sequence; a microbial maintenance system is arranged in the CSO storage tank;

[0006] The CSO storage tank includes an anoxic tank and an aerobic tank connected in sequence; the first inlet of the anoxic tank is connected to the grid, the first outlet of the aerobic tank is connected to the physicochemical treatment unit; the second outlet of the aerobic tank is connected to the second inlet of the anoxic tank.

[0007] In the technical solution of the embodiment of the present application, the CSO storage tank is divided into an anoxic tank and an aerobic tank, and the anoxic tank and the aerobic tank are connected in a loop, so that the overflow water first undergoes denitrification reaction, then flows into the aerobic tank for nitrification reaction, and then flows back to the anoxic tank for denitrification reaction, thereby fully denitrifying the overflow water to facilitate subsequent physical and chemical reprocessing.

[0008] In some embodiments, the microbial maintenance system includes biological fillers arranged in the cavity of the CSO storage tank and a plurality of spraying devices disposed at the top of the CSO storage tank.

[0009] In this embodiment, biological fillers and spraying equipment are arranged in the CSO storage tank. In this way, the microorganisms are distributed in the biological fillers evenly distributed in the cavity of the CSO storage tank, so that the microorganisms can be evenly distributed in the overflow water for uniform and sufficient treatment. The provided spraying equipment can replenish the CSO storage tank with water, carbon source additives, or other agents such as biological enzymes. This not only maintains the activity of the microorganisms when the CSO storage tank is in a water-free state, but also ensures the absolute dominance of effective bacterial species in the aerobic tank and the anoxic tank when the CSO storage tank is empty, and regulates the denitrification reaction effects in the anoxic tank and the ammoniation or digestion reaction effects in the aerobic reaction tank.

[0010] In some embodiments, the spraying device is located above the biological filler;

[0011] The spacing between the nozzles of the plurality of spraying devices is: the horizontal and vertical spacing ranges are: 2000 to 4000 mm;

[0012] The height between the nozzle and the top of the biological filler is 350 to 750 mm.

[0013] In this embodiment, by positioning the spraying device above the biofiller and maintaining a suitable distance between the spraying devices and between the spraying device and the biofiller, the water or agent in the spraying device can be spread more evenly on the biofilm.

[0014] In some embodiments, the CSO storage tank embedded biochemical treatment device further comprises an environmental monitoring unit for monitoring the status of substances in the CSO storage tank;

[0015] The environmental monitoring unit includes one or more of a liquid level meter, a hygrometer, an online pH meter, and an online water quality monitor.

[0016] In this embodiment, by providing an environmental monitoring unit in the CSO storage tank, the changing conditions of the overflow water in the CSO storage tank can be monitored in real time, and the entire device can be regulated in a timely manner to ensure normal operation of the device.

[0017] In some embodiments, a plurality of underwater flow propellers are arranged at the bottom of the CSO storage tank.

[0018] In this embodiment, by deploying several underwater flowmakers at the bottom of the CSO storage tank, the water flow in the tank can be maintained, preventing suspended matter and sludge in the sewage from settling at the bottom of the tank, and maintaining uniform water quality in the tank. The stirring action of the flowmakers can increase the contact area between the sewage and the air, improve the oxygen transfer rate, promote the growth of aerobic microorganisms, and thus improve sewage treatment efficiency. It also helps to decompose organic matter in the sewage, reduce the generation of malodorous gases, and improve the surrounding environment.

[0019] In some embodiments, the aerobic tank is provided with an ultra-nano aerosol reoxygenation system.

[0020] In this embodiment, by setting up an ultra-nano aerosol reoxygenation system in the aerobic pool, oxygen can be supplied to the aerobic pool to control the DO concentration.

[0021] In some embodiments, the CSO storage tank embedded biochemical treatment device further includes a control unit for regulating the operating state of the CSO storage tank.

[0022] In this embodiment, by providing a control unit for regulating the operating state of the CSO storage tank, the entire device can be operated normally simply by operating the control unit. Such intelligent operation reduces a lot of manpower and material resources, thereby improving quality and efficiency.

[0023] In some embodiments, the CSO storage tank embedded biochemical treatment device further includes a sludge dewatering machine connected to the outlet of the CSO storage tank.

[0024] In this embodiment, by connecting a sludge dewatering machine to the outlet of the CSO storage tank, a large amount of water in the sludge can be removed, thereby significantly reducing the volume of the sludge and facilitating subsequent treatment.

[0025] In some embodiments, a plurality of flushing corridors are provided at the bottom of the CSO storage tank, wherein the elevation of the side of the corridor close to the drainage ditch of the CSO storage tank is lower than the elevation of the side close to the flushing gate of the CSO storage tank.

[0026] In this embodiment, by providing several groups of flushing galleries at the bottom of the CSO reservoir, sediments such as sludge, gravel, and other solid waste on the bottom and sidewalls of the CSO reservoir can be effectively cleaned, thereby keeping the reservoir clean. By setting the elevation of the side of the galleries near the CSO reservoir drain ditch lower than the elevation of the side near the CSO reservoir flushing gate, the overflow water will naturally flow from the higher side to the lower side. This water flow can effectively flush the galleries, flushing the sludge and debris deposited in the galleries into the drain ditch for subsequent treatment.

[0027] In some embodiments, the angles of the plurality of underwater flowmakers are not consistent.

[0028] In this embodiment, by setting the angles of the underwater flow promoters to be inconsistent, the overflow water flow can be more evenly distributed in the regulating reservoir, reducing dead zones and low-speed zones, and improving sewage treatment efficiency; flow promoters at different angles can also more effectively prevent sludge and solid waste from accumulating at the bottom and corners of the pool.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the technical solution of this application, the following is a brief introduction to the drawings used in this application. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0031] Figure 1 This is a process diagram of biochemical treatment performed by an embedded biochemical treatment device in a CSO storage tank according to an embodiment of the present application;

[0032] Figure 2 This is a top view of the CSO storage tank embedded biochemical treatment device in the embodiment of the present application (the layout on the right is consistent with that on the left and is not shown in the figure);

[0033] Figure 3 This is a plan view of a single flushing gallery of a CSO storage tank in an embodiment of the present application;

[0034] Figure 4 This is a cross-sectional view of a single filler area in a CSO storage tank in an embodiment of the present application;

[0035] Description of reference numerals:

[0036] 1. Anoxic tank; 11. Channel; 2. Aerobic tank; 3. Ultra-nano aerosol reoxygenation system; 32. Oxygen generator; 4. Biological filler; 41. Biological rope filler; 42. Fixed frame; 51. Spraying equipment; 52. Environmental monitoring unit; 53. Dosing system; 6. Control unit; 7. Sludge dewatering machine; 8. Return pump; 9. Underwater flow generator. DETAILED DESCRIPTION

[0037] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0039] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0040] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0042] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0043] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0044] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0045] Existing overflow water treatment devices only have a storage function. If they are discharged directly into receiving water bodies without treatment, they can easily cause environmental pollution. Therefore, it is particularly important to rationally design equipment to efficiently treat this overflow water.

[0046] In order to solve the above-mentioned technical problems, the present application provides an embedded biochemical treatment device in a CSO storage tank, wherein an anoxic tank 1 and an aerobic tank 2 are sequentially connected through the CSO storage tank, and the anoxic tank 1 and the aerobic tank 2 are cyclically connected. At the same time, a microbial maintenance system is arranged in the CSO storage tank, so that the overflow water can be digested and denitrified to achieve efficient treatment of the overflow water and avoid environmental pollution caused by subsequent sewage discharge.

[0047] For the convenience of description, the following embodiments are described by taking a CSO storage tank embedded biochemical treatment device according to one embodiment of the present application as an example.

[0048] Please refer to Figure 1 , Figure 1 The process diagram of the CSO storage tank embedded biochemical treatment device provided in the embodiment of this application includes: a grid, a CSO storage tank, and a physicochemical treatment unit connected in sequence; the CSO storage tank is equipped with a microbial maintenance system;

[0049] The CSO storage tank includes an anoxic tank 1 and an aerobic tank 2 connected in sequence; the anoxic tank 1 and the aerobic tank 2 are connected through a channel 11; the inlet 1 of the anoxic tank 1 is connected to the grid, and the outlet 1 of the aerobic tank 2 is connected to the physicochemical treatment unit; the outlet 2 of the aerobic tank 2 is connected to the inlet 2 of the anoxic tank 1 through a reflux pump 8; the overflow water first undergoes denitrification reaction in the anoxic tank 1: the overflow water then undergoes ammoniation reaction and nitrification reaction in the aerobic tank 2: first, nitrogen-containing organic matter is decomposed and converted into NH4 under the metabolism of ammonification functional bacteria + Then, under aerobic conditions, nitrite-reducing bacteria and nitrifying bacteria in the biofilm are used to convert NH4 + Then at the end of the aerobic pool 2, the water from the aerobic pool 2 is returned to the anoxic pool 1 by a reflux pump 8 for denitrification, and the denitrifying bacteria convert the nitrate (NO3 - ) through a series of intermediate products (NO2 - , NO, and N2O) are reduced to nitrogen gas (N2), achieving the purpose of denitrification. Simultaneously, during nitrification and denitrification, microorganisms consume organic matter in the water as a carbon source, significantly reducing the concentration of organic matter in the overflow water and achieving carbon reduction. After carbon reduction and denitrification, the overflow water undergoes subsequent physicochemical treatment (including the addition of chemicals to the water in the physicochemical treatment unit to enhance phosphorus removal).

[0050] Furthermore, in the embodiments of the present application, Figure 2 As shown, the microbial maintenance system includes biological fillers 4 evenly arranged in the cavity of the CSO storage tank and a plurality of spraying devices 51 installed at the top of the CSO storage tank. In this way, the microorganisms are evenly distributed in the biological fillers 4 in the cavity of the CSO storage tank, so that the microorganisms can be evenly distributed in the overflow water for uniform and sufficient treatment. The spraying devices 51 can replenish the CSO storage tank with water, carbon source additives, or other agents such as biological enzymes. This not only maintains the activity of microorganisms when the CSO storage tank is in a water-free state, but also ensures that the effective bacterial species in the aerobic tank 2 and the anoxic tank 1 have an absolute advantage in reproduction when the CSO storage tank is empty, and regulates the denitrification reaction effects of the anoxic tank 1 and the ammoniation or digestion reaction effects of the aerobic reaction tank.

[0051] In some embodiments of the present application, the spraying device 51 is connected to a dosing system 53, and the reagents in the dosing system 53 include tap water, carbon source additive liquid and biological enzyme preparation; when the C / N value in the anoxic tank 1 is small, the spraying device 51 can replenish the carbon source in time to promote the denitrification reaction.

[0052] In some embodiments of the present application, the biological filler 4 includes a biofilm filler; the biofilm filler includes a bio-rope filler 41; the bio-rope filler 41 is fixed and distributed in the CSO storage tank through a fixed frame 42 in the CSO storage tank.

[0053] In some embodiments of the present application, the material of the biofilm is: elastic PET material as the skeleton, mixed with elastic and fluffy PP material; the strength of the biofilm is: the maximum breaking strength can reach 2800N, and the service life can reach 8 to 10 years; the specific surface area of the biofilm is: 4000 to 5000m 2 / m 3 The filling spacing of the biofilm is 200 to 500 mm horizontally and 200 to 500 mm vertically, and is evenly arranged in the area. The height of the biofilm is 3000 to 8000 mm. The installation method is that a fixed bracket is set at the edge of the storage tank, and a high-strength rope is used to connect and position the middle of the bracket. The upper and lower ends of the bio-rope filler 41 are fixed on the rope.

[0054] Furthermore, in the embodiments of the present application, Figure 2 As shown, the spraying device 51 is located above the biological filler 4;

[0055] The spacing between the nozzles of the plurality of spraying devices 51 is: the horizontal and vertical spacing ranges are: 2000 ~ 4000mm;

[0056] The height between the nozzle and the top of the biological filler 4 is 350-750 mm; this allows the water or agent in the spraying device 51 to be spread more evenly on the biofilm.

[0057] Furthermore, in the embodiments of the present application, Figure 2 As shown, the CSO storage tank embedded biochemical treatment device further includes an environmental monitoring unit 52 for monitoring the substance status in the CSO storage tank;

[0058] The environmental monitoring unit 52 includes one or more of a liquid level meter, a hygrometer, an online pH meter, and an online water quality monitor; it can monitor the changes in overflow water in the CSO storage tank in real time and regulate the entire device in a timely manner to ensure normal operation of the device.

[0059] Furthermore, in the embodiments of the present application, Figure 2 As shown, a number of underwater flow propellants 9 are evenly distributed on the bottom of the CSO storage tank. These can help the water flow in the tank to keep flowing, prevent suspended matter and sludge in the sewage from settling at the bottom of the tank, and maintain uniform water quality in the tank. The stirring action of the flow propellants can increase the contact area between sewage and air, improve the oxygen transfer rate, and promote the growth of aerobic microorganisms, thereby improving sewage treatment efficiency. They can also help decompose organic matter in sewage, reduce the generation of malodorous gases, and improve the surrounding environment.

[0060] Furthermore, in the embodiments of the present application, Figure 2 As shown, the top of the aerobic pool 2 is provided with an ultra-nano aerosol reoxygenation system 3. Thus, when overflow water in the CSO storage tank undergoes biochemical treatment, the ultra-nano aerosol reoxygenation system 3 is turned on to maintain the DO concentration in the aerobic pool 2 within a predetermined range.

[0061] In some embodiments of the present application, the ultra-nano aerosol reoxygenation system 3 is connected to an oxygen generator 32, which is used to prepare O2.

[0062] In some embodiments of the present application, the oxygen supply capacity of the ultra-nano aerosol reoxygenation system 3 is: ≥120SLPM (10kg / h); oxygen supply method: PSA oxygen supply; oxygen supply pressure: ≥0.8MPa; water inlet pressure: ≥0.1MPa; main engine working pressure: 0.4MPa-0.5Mpa; oxygen utilization rate: ≥90%; oxygen mass transfer efficiency: 90-95%; equivalent dissolved oxygen in effluent: ≥90mg / L; power: installed power 476KW, operating power 396KW.

[0063] Furthermore, in the embodiment of the present application, the CSO storage tank embedded biochemical treatment device also includes a control unit 6 for regulating the operating state of the CSO storage tank; thus, the entire device can be operated normally by simply operating the control unit 6. Such intelligent operation reduces a large amount of manpower and material resources, thereby improving quality and efficiency.

[0064] In some embodiments of the present application, the control mode of the control unit 6 is:

[0065] When the water level h of the CSO storage tank is equal to 0 and the humidity rh of the aerobic tank 2 and the anoxic tank 1 is lower than the set value rh1, the control unit 6 controls the spraying device 51 to open, and the spraying liquid in the spraying device 51 is a mixture of tap water and biological enzyme preparation.

[0066] When the water level h of the CSO regulating reservoir is higher than the first set height h1, the control unit 6 turns off the water pump at the outlet of the CSO regulating reservoir and the reflux pump 8 at the end of the aerobic tank 2, and turns on the ultra-nano aerosol reoxygenation system 3 at the same time.

[0067] When the water level h of the CSO regulating reservoir is higher than the second set height h2 (h2>h1), the control unit 6 turns off the water pump at the outlet of the CSO regulating reservoir, and simultaneously turns on the reflux pump 8 and the ultra-nano aerosol reoxygenation system 3 at the end of the aerobic tank 2, and the operation time is about 36 to 48 hours.

[0068] When the water level h in the CSO reservoir is greater than 0 and the C / N ratio m in the anoxic tank 1 is less than the set value m1, the control unit 6 turns on the spraying device 51, spraying a mixture of carbon source additive solution and tap water. When the water level h in the CSO reservoir is greater than 0 and the C / N ratio m in the anoxic tank 1 is greater than or equal to the set value m1, the control unit 6 turns off the spraying device 51.

[0069] Furthermore, in the embodiments of the present application, Figure 1 As shown, the CSO storage tank embedded biochemical treatment device also includes a sludge dewatering machine 7 connected to the outlet of the CSO storage tank. Thus, after the overflow water undergoes carbon reduction and nitrogen removal, the remaining sludge is pumped into the sludge dewatering machine 7 for dehydration before undergoing subsequent treatment. The remaining sludge is then treated according to the existing treatment scheme for the CSO storage tank.

[0070] Furthermore, in the embodiments of the present application, Figure 4As shown, the bottom of the CSO reservoir is provided with several groups of flushing galleries. The elevation of the side of the galleries near the CSO reservoir drain is lower than the elevation of the side near the CSO reservoir flushing gate (the bottom slope of the galleries is 0.01). The provision of several groups of flushing galleries can effectively clean sediments on the bottom and side walls of the CSO reservoir, such as sludge, gravel, and other solid waste, to keep the reservoir clean. By setting the elevation of the side of the galleries near the CSO reservoir drain at a lower elevation than the side near the CSO reservoir flushing gate, the overflow water will naturally flow from the higher side to the lower side. This water flow can effectively flush the galleries, flushing the sludge and debris deposited in the galleries into the drain ditch for subsequent treatment.

[0071] Furthermore, in the embodiments of the present application, Figure 1 As shown, the angles of several of the underwater flow propellants 9 are not consistent; the overflow water flow can be more evenly distributed in the regulating reservoir, reducing dead zones and low-speed zones, and improving sewage treatment efficiency; flow propellants at different angles can also more effectively prevent sludge and solid waste from accumulating at the bottom and corners of the pool.

[0072] The working principle of the CSO storage tank embedded biochemical treatment device is described in more detail below:

[0073] Combined system overflow conditions:

[0074] When rainfall occurs, especially heavy rain, overflow water is discharged into the CSO regulating reservoir, and the liquid level of the CSO regulating reservoir rises. When the liquid level h exceeds the first set liquid level h1, the control unit 6 starts the ultra-nano aerosol reoxygenation system 3 and the underwater flow propeller 9, and turns off the return pump 8, so that the dissolved oxygen in the aerobic tank 2 quickly rises to above 2 mg / L, and the activity of aerobic microorganisms on the biofilm gradually recovers to the optimal activity within 24 hours; when the liquid level continues to rise and exceeds the second set liquid level h2, the ultra-nano aerosol reoxygenation system 3 and the underwater flow propeller 9 are continued to be started, and the return pump 8 is turned on, so that the overflow water after the denitrification reaction in the aerobic tank 2 is returned to the anoxic tank 1 for denitrification reaction. The overflow water undergoes a rapid anoxic-aerobic biochemical reaction. Under aerobic conditions, the nitrifying bacteria in the biofilm of aerobic tank 2 convert the nitrogen-containing substances in the overflow water (including organic nitrogen and inorganic nitrogen) into nitrates. Then, under anoxic conditions (dissolved oxygen < 0.5 mg / L), the denitrifying bacteria in the biofilm of anoxic tank 1 reduce the nitrates in the overflow water into gaseous nitrogen. The COD and ammonia nitrogen removal rates in the water exceed 70%.

[0075] When the C / N ratio of the water in the anoxic tank 1 is less than the set value m1, the control unit 6 turns on the spraying device 51, and the spraying liquid is a mixture of the carbon source additive liquid and tap water.

[0076] Microbial maintenance conditions:

[0077] On sunny days or during light rain, when the CSO reservoir is empty, the water level h is equal to 0. When the biofilm humidity falls below a set value, rh1 (45-60%), control unit 6 activates spraying device 51 and shuts down other devices. The spraying liquid is a mixture of tap water and a bio-enzyme preparation to maintain microbial activity.

[0078] Please also refer to Figures 1 to 4 According to one or more embodiments of the present application, the CSO storage tank embedded biochemical treatment device provided by the present application is composed of a grid, a CSO storage tank, a physicochemical treatment unit, an environmental monitoring unit 52, and a control unit 6 connected in sequence to form a complete biochemical treatment device; the entire process is efficient and energy-saving when treating overflow water, and can ensure that the treated overflow water meets the first-level emission standard of the "Pollutant Discharge Standard for Urban Wastewater Treatment Plants" (GB18918-2002).

[0079] Biological fillers 4 are arranged in the cavity of the CSO storage tank, several spray devices 51 are installed at the top of the CSO storage tank, and an ultra-nano aerosol reoxygenation system 3 is installed in the aerobic tank 2 to activate the microorganisms in the CSO storage tank in real time, so that the overflow water can receive timely biochemical treatment. This biochemical treatment method diversifies the functions of the storage tank and makes the overflow water treatment more efficient.

[0080] The entire device can start different equipment at different time periods according to different working conditions. In addition, it has a high degree of automation, easy operation, stable operation, safety and reliability, energy saving and environmental protection, effectively reducing labor intensity and production costs, and has good energy-saving and emission reduction effects.

[0081] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are merely examples, and any embodiments having substantially the same structure and effect as the technical concept within the scope of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the present application, any other embodiments that can be conceived by those skilled in the art and that combine some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A CSO storage tank embedded biochemical treatment device, characterized in that: include: A grid, a CSO storage tank, and a physicochemical treatment unit are connected in sequence; a microbial maintenance system is arranged in the CSO storage tank; The CSO storage tank includes an anoxic tank and an aerobic tank connected in sequence; the first inlet of the anoxic tank is connected to the grid, the first outlet of the aerobic tank is connected to the physicochemical treatment unit; the second outlet of the aerobic tank is connected to the second inlet of the anoxic tank.

2. The CSO storage tank embedded biochemical treatment device according to claim 1 is characterized in that: The microorganism maintenance system includes biological fillers arranged in the cavity of the CSO storage tank and a plurality of spraying devices arranged at the top of the CSO storage tank.

3. The CSO storage tank embedded biochemical treatment device according to claim 2, characterized in that: The spraying device is located above the biological filler; The spacing between the nozzles of the plurality of spraying devices is: the horizontal and vertical spacing ranges are: 2000 to 4000 mm; The height between the nozzle and the top of the biological filler is 350 to 750 mm.

4. The CSO storage tank embedded biochemical treatment device according to claim 2, characterized in that: Also included is an environmental monitoring unit for monitoring the conditions of substances in the CSO storage tank; The environmental monitoring unit includes one or more of a liquid level meter, a hygrometer, an online pH meter, and an online water quality monitor.

5. The CSO storage tank embedded biochemical treatment device according to claim 4 is characterized in that: A number of underwater flow propellers are arranged at the bottom of the CSO storage tank.

6. The CSO storage tank embedded biochemical treatment device according to claim 5, characterized in that: An ultra-nano aerosol reoxygenation system is provided in the aerobic pool.

7. The CSO storage tank embedded biochemical treatment device according to claim 6, characterized in that: Also includes: A control unit for regulating the operating state of the CSO storage tank.

8. The CSO storage tank embedded biochemical treatment device according to claim 1, characterized in that: Also includes: A sludge dewatering machine is connected to the outlet of the CSO storage tank.

9. The CSO storage tank embedded biochemical treatment device according to claim 4, characterized in that: A plurality of flushing corridors are provided at the bottom of the CSO regulating reservoir, wherein the elevation of the side of the corridor close to the drainage ditch of the CSO regulating reservoir is lower than the elevation of the side close to the flushing gate of the CSO regulating reservoir.

10. The CSO storage tank embedded biochemical treatment device according to claim 5, characterized in that: The angles of several underwater flow propellers are not consistent.

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