Integrated novel A / O tank

Abstract

The invention relates to the technical field of sewage treatment, and provides an integrated novel A / O tank which comprises an anaerobic zone, a circulating low-oxygen aeration zone, an air plug flow zone, an aeration pipeline set and a settling zone, the output end of the anaerobic zone is connected with the input end of the circulating low-oxygen aeration zone, the aeration pipeline set is arranged on one side of the circulating low-oxygen aeration zone, and the settling zone is arranged on the other side of the circulating low-oxygen aeration zone. An air plug flow area is arranged on the other side of the circulating low-oxygen aeration area, the output end of the circulating low-oxygen aeration area is connected with the input end of the settling area, the circulating low-oxygen aeration area comprises a first low-oxygen aeration area and a second low-oxygen aeration area, the input end of the first low-oxygen aeration area is connected with the input end of the anaerobic area, and the input end of the second low-oxygen aeration area is connected with the input end of the settling area. The output end of the first low-oxygen aeration area is connected with the input end of the second low-oxygen aeration area, and the second low-oxygen aeration area is connected with the input end of the first low-oxygen aeration area through the air plug flow area. According to the invention, the energy consumption can be greatly reduced, the efficiency can be improved, the inlet water can be diluted, the impact load can be reduced, a stable growth environment can be provided for microorganisms, and the dissolved oxygen control is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, IPC classification number: C02F3 / 30, and in particular to an integrated new A / O pool. Background Art

[0002] The integrated A / O tank is a process in sewage treatment, which stands for the "Anaerobic / Oxic" process, that is, the "Anaerobic / Aerobic" process. This process completes the anaerobic (Anaerobic) and aerobic (Oxic) processes in the same treatment tank, so it is called "integrated".

[0003] For example, the sewage treatment A / O tank body disclosed in application number: CN202122343329.6 includes a base surface, on which a dam body is arranged, the dam body is closed, and a dam is arranged inside the dam body, which divides the dam body into an O zone and an A zone, and an impermeable membrane is paved on the inner wall of the dam body and the walls on both sides of the dam, and a first guide pipe is pre-buried in the dam, and both ends of the first guide pipe are connected to the O zone and the A zone, and at least one aeration pipe is arranged on the bottom surface of the O zone, and all aeration pipes are connected to the aeration main pipe, and the aeration main pipe is connected to the air supply device.

[0004] However, the existing low-oxygen aeration zone has a large impact load and a poor microbial growth environment; the dissolved oxygen control level is poor and the energy consumption is high, which is not conducive to saving energy and reducing energy consumption. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an integrated new A / O pool to solve the problem.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The integrated new A / O pool comprises: an anaerobic zone, a circulating low oxygen aeration zone, an air flow zone, an aeration pipeline group and a sedimentation zone, wherein the output end of the anaerobic zone is connected to the input end of the circulating low oxygen aeration zone, an aeration pipeline group is arranged on one side of the circulating low oxygen aeration zone, an air flow zone is arranged on the other side of the circulating low oxygen aeration zone, the output end of the circulating low oxygen aeration zone is connected to the input end of the sedimentation zone, and the low dissolved oxygen concentration in the circulating low oxygen aeration zone is 0.5 mg / L, and the high sludge concentration is 5-8 g / L.

[0008] Preferably, the circulating low oxygen aeration zone includes: a first low oxygen aeration zone and a second low oxygen aeration zone, the input end of the first low oxygen aeration zone is connected to the input end of the anaerobic zone, the output end of the first low oxygen aeration zone is connected to the input end of the second low oxygen aeration zone, and the second low oxygen aeration zone is connected to the input end of the first low oxygen aeration zone through an air push flow zone.

[0009] Preferably, the aeration pipeline group includes: an aeration pipeline, an aeration fan, a DOCS cabinet and a dissolved oxygen meter. The aeration pipeline is arranged in a circulating low-oxygen aeration zone, the output end of the aeration fan is connected to the input end of the aeration pipeline, the aeration fan and the dissolved oxygen meter are electrically connected to the DOCS cabinet, and the detection end of the dissolved oxygen meter is arranged in the circulating low-oxygen aeration zone.

[0010] Preferably, the aeration pipeline is provided with multiple groups, the spacing between the multiple groups of aeration pipelines is 10-15cm, and the ventilation volume of the aeration pipeline is 0.5-1m 3 / mh. The rising speed of bubbles in aeration method is 0.4~0.6m / s.

[0011] Preferably, an air flow promoter is provided in the air flow promoting zone, and the air flow promoter is provided at the connection between the first low oxygen aeration zone and the second low oxygen aeration zone.

[0012] Preferably, the aeration pipeline is arranged in the circulating low-oxygen aeration zone through a clamp wheel, and the end of the aeration pipeline extends out of the circulating low-oxygen aeration zone and is connected to an aeration fan.

[0013] The advantages of the present invention are as follows: by setting the low dissolved oxygen concentration at 0.5 mg / L, the energy consumption can be greatly reduced; by setting the high sludge concentration at 5-8 g / L, the efficiency can be improved; the high sludge concentration can improve the resistance to shock load; by setting a circulating low oxygen aeration zone, the incoming water can be diluted, the shock load can be reduced, a stable growth environment can be provided for microorganisms, and the pollution load in the system can be evened out to stabilize the dissolved oxygen control; by applying the intelligent dissolved oxygen control system, the system stability can be improved, energy can be saved and consumption can be reduced; the high-efficiency aeration system has the functions of self-cleaning and non-stop replacement; the integrated structure is adopted to save floor space and reduce civil engineering investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the circulating low oxygen aeration zone and the aeration pipeline group of the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the aeration pipeline of the present invention arranged in the circulating low oxygen aeration zone;

[0018] Figure 4 It is a structural schematic diagram of the air flow generator of the present invention;

[0019] Figure 5It is the mechanism formula of the denitrification process of the present invention;

[0020] Figure 6 is the denitrification removal rate at different low dissolved oxygen concentrations of the present invention;

[0021] Figure 7 It is the total bacterial phylogenetic tree in the system of the present invention.

[0022] Description of reference numerals:

[0023] 1. Anaerobic zone; 2. Circulating low oxygen aeration zone; 3. Air flow zone; 4. Aeration pipeline group; 5. Sedimentation zone; 21. First low oxygen aeration zone; 22. Second low oxygen aeration zone; 41. Aeration pipeline; 42. Aeration fan; 43. DOCS cabinet; 44. Dissolved oxygen meter; 31. Air flow device. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] Embodiment 1:

[0028] Figure 1 It is a schematic diagram of the structure of the present invention, combined with Figure 1To illustrate, the integrated new A / O pool includes: an anaerobic zone 1, a circulating low-oxygen aeration zone 2, an air plug flow zone 3, an aeration pipeline group 4 and a sedimentation zone 5. The output end of the anaerobic zone 1 is connected to the input end of the circulating low-oxygen aeration zone 2, the aeration pipeline group 4 is arranged on one side of the circulating low-oxygen aeration zone 2, the air plug flow zone 3 is arranged on the other side of the circulating low-oxygen aeration zone 2, and the output end of the circulating low-oxygen aeration zone 2 is connected to the input end of the sedimentation zone 5.

[0029] Figure 2 The schematic diagram of the structure of the circulating low oxygen aeration zone and aeration pipeline group of the present invention is combined with Figure 2 For explanation, the circulating low oxygen aeration zone 2 includes: a first low oxygen aeration zone 21 and a second low oxygen aeration zone 22, the input end of the first low oxygen aeration zone 21 is connected to the input end of the anaerobic zone 1, the output end of the first low oxygen aeration zone 21 is connected to the input end of the second low oxygen aeration zone 22, and the second low oxygen aeration zone 22 is connected to the input end of the first low oxygen aeration zone 21 through the air push flow zone 3.

[0030] Figure 3 The aeration pipeline of the present invention is arranged in the circulating low oxygen aeration zone. Figure 3 For explanation, the aeration pipeline group 4 includes: an aeration pipeline 41, an aeration fan 42, a DOCS cabinet 43 and a dissolved oxygen meter 44, the aeration pipeline 41 is arranged in the circulating low-oxygen aeration zone 2, the output end of the aeration fan 42 is connected to the input end of the aeration pipeline 41, the aeration fan 42 and the dissolved oxygen meter 44 are electrically connected to the DOCS cabinet 43, and the detection end of the dissolved oxygen meter 44 is arranged in the circulating low-oxygen aeration zone 2.

[0031] During operation, the dissolved oxygen meter 44 detects the dissolved oxygen concentration in the low oxygen aeration zone, converts the dissolved oxygen concentration into an electrical signal and sends it to the DOCS cabinet 43. The DOCS cabinet 43 adjusts the output power of the aeration fan 42 according to the electrical signal, thereby stabilizing the dissolved oxygen concentration in the low oxygen aeration zone. The DOCS cabinet 43 adjusts the blower operating frequency by recording and calculating the current signal, and also has the functions of data memory, automatic gear adjustment, and self-learning.

[0032] In view of the day and night fluctuations in municipal sewage volume, DOCS cabinet 43 can provide air volume on demand to avoid waste.

[0033] The aeration pipelines 41 are provided in multiple groups, the spacing between the multiple groups of aeration pipelines 41 is 10-15 cm, and the ventilation volume of the aeration pipelines 41 is 0.5-1m 3 / mh. The rising speed of bubbles in the aeration method is 0.4-0.6m / s. The diameter of the aeration pipeline 41 is 65mm, which is used for a pool with a water depth of 6m. The service area of ​​a single aeration pipeline 41 is 0.30m 2 / m.

[0034] The aeration pipeline 41 is arranged in the circulating low-oxygen aeration zone 2 through a clamping wheel, and the end of the aeration pipeline 41 extends out of the circulating low-oxygen aeration zone 2 and is connected to the aeration fan 42, so that the aeration pipeline 41 can be repaired and replaced without stopping the vehicle, and the aeration pipeline 41 can be directly pulled out from the left side.

[0035] Figure 4 It is a schematic diagram of the structure of the air flow generator of the present invention, combined with Figure 4 For explanation, an air flow pusher 31 is provided in the air flow pushing area 3, and the air flow pusher 31 is provided at the connection between the first low oxygen aeration area 21 and the second low oxygen aeration area 22. The air flow pusher 31 has a very low head (the liquid level difference before and after the air flow is measured in centimeters) and obtains a very large flow rate under the premise of the same energy consumption, which greatly reduces the energy consumption required for the flow pushing and improves the efficiency of the flow pushing.

[0036] The low dissolved oxygen concentration in the circulating low oxygen aeration zone 2 is 0.5 mg / L, and the high sludge concentration is 5-8 g / L.

[0037] By controlling the low dissolved oxygen concentration to 0.5mg / L, energy consumption can be saved. The circulating low oxygen aeration zone 2 has both hydrolysis and acidification effects, and has good adaptability to difficult-to-degrade COD. The COD removal effect is better than other aerobic processes. While the process effectively removes COD, low dissolved oxygen creates conditions for simultaneous nitrification and denitrification, achieving a thorough denitrification process in the aeration tank, simplifying the process flow and saving investment. Low dissolved oxygen control avoids a large amount of "oxygen" waste, achieving energy conservation and consumption reduction in sewage treatment plants.

[0038] High sludge concentration achieves high microbial biomass. “Strength in numbers” greatly improves the volumetric removal efficiency of the process and saves the volume of the tank. High sludge concentration operation improves the process's ability to resist shocks. Sludge concentration prolongs the sludge age, reduces the amount of residual sludge during process operation, and saves the cost of sludge treatment.

[0039] Figure 5 It is the mechanism formula of the denitrification process of the present invention; Figure 6 is the denitrification removal rate at different low dissolved oxygen concentrations of the present invention; Figure 7 The present invention is a systematic reorganization of the bacterial phylogenetic tree, combined with Figure 5 , Figure 6 and Figure 7 It is explained that simultaneous nitrification and denitrification can save 25% of oxygen, and the energy consumption of high total nitrogen wastewater can be significantly reduced; Figure 7 As shown, the dominant bacteria in this system are mainly Proteobacteria, Chloroflexi, etc. Under low dissolved oxygen concentration, the microbial species in the system are very rich, including all identified bacterial populations, thus providing a guarantee for the functional stability of this system.

[0040] The working principle of the present invention is as follows: during operation, the dissolved oxygen meter 44 detects the dissolved oxygen concentration in the low oxygen aeration zone, converts the dissolved oxygen concentration into an electrical signal and sends it to the DOCS cabinet 43. The DOCS cabinet 43 adjusts the output power of the aeration fan 42 according to the electrical signal, thereby stabilizing the dissolved oxygen concentration in the low oxygen aeration zone. The sewage flows into the anaerobic zone 1, and then flows from the anaerobic zone 1 into the circulating low oxygen aeration zone 2. Water treatment and denitrification are carried out in the circulating low oxygen aeration zone 2, and finally enters the sedimentation zone 5. The treated sewage is discharged from the sedimentation zone 5. The present invention can greatly reduce energy consumption, improve efficiency, dilute the incoming water, reduce the impact load, provide a stable growth environment for microorganisms, and stabilize the dissolved oxygen control.

[0041] For those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim involved.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any slight modification, equivalent substitution and improvement made to the above embodiment based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. The integrated new A / O pool is characterized by: include: The invention relates to an anaerobic zone (1), a circulating low oxygen aeration zone (2), an air push flow zone (3), an aeration pipeline group (4) and a sedimentation zone (5); the output end of the anaerobic zone (1) is connected to the input end of the circulating low oxygen aeration zone (2); the aeration pipeline group (4) is arranged on one side of the circulating low oxygen aeration zone (2); the air push flow zone (3) is arranged on the other side of the circulating low oxygen aeration zone (2); the output end of the circulating low oxygen aeration zone (2) is connected to the input end of the sedimentation zone (5); the low dissolved oxygen concentration in the circulating low oxygen aeration zone (2) is 0.5 mg / L , the high sludge concentration is 5-8g / L; the aeration pipeline group (4) includes: an aeration pipeline (41), an aeration fan (42), a DOCS cabinet (43) and a dissolved oxygen meter (44), the aeration pipeline (41) is arranged in the circulating low-oxygen aeration zone (2), the output end of the aeration fan (42) is connected to the input end of the aeration pipeline (41), the aeration fan (42) and the dissolved oxygen meter (44) are electrically connected to the DOCS cabinet (43), and the detection end of the dissolved oxygen meter (44) is arranged in the circulating low-oxygen aeration zone (2).

2. The integrated novel A / O pool according to claim 1, characterized in that: The circulating low oxygen aeration zone (2) comprises: a first low oxygen aeration zone (21) and a second low oxygen aeration zone (22); the input end of the first low oxygen aeration zone (21) is connected to the input end of the anaerobic zone (1); the output end of the first low oxygen aeration zone (21) is connected to the input end of the second low oxygen aeration zone (22); and the second low oxygen aeration zone (22) is connected to the input end of the first low oxygen aeration zone (21) via an air push flow zone (3).

3. The integrated novel A / O pool according to claim 1, characterized in that: The aeration pipelines (41) are provided in multiple groups, the spacing between the multiple groups of aeration pipelines (41) is 10-15 cm, and the ventilation volume of the aeration pipelines (41) is 0.5-1m 3 / mh. The rising speed of bubbles in aeration method is 0.4~0.6m / s.

4. The integrated novel A / O pool according to claim 1, characterized in that: An air flow pusher (31) is arranged in the air flow pusher area (3), and the air flow pusher (31) is arranged at the connection between the first low oxygen aeration area (21) and the second low oxygen aeration area (22).

5. The integrated novel A / O pool according to claim 3, characterized in that: The aeration pipeline (41) is arranged in the circulating low-oxygen aeration zone (2) via a clamping wheel, and the end of the aeration pipeline (41) extends out of the circulating low-oxygen aeration zone (2) and is connected to an aeration fan (42).

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