Improved MBBR (Moving Bed Biofilm Reactor) water quality purification process device

Abstract

The utility model relates to the technical field of sewage treatment and water quality purification, in particular to an improved MBBR (Moving Bed Biofilm Reactor) water quality purification process device, which comprises an MBBR tank, the MBBR tank is respectively connected with an air blower room and an air floatation tank, the MBBR tank is communicated with the air blower room through an aeration main pipe, an aeration valve is arranged on the aeration main pipe, an air knife is arranged in the MBBR tank, and the air knife is connected with the air floatation tank through a pipeline. And the air knife is communicated with the air knife air supply pipe. A water quality purification process device arranged in the device is constructed based on a traditional moving bed bio-membrane reactor and is coupled with an activated sludge internal reflux device, a temperature controller and a concentration sensor are additionally arranged on a sludge-water separation part, and part of activated sludge is refluxed to the front end of a moving bed bio-membrane reaction tank under the conditions of sudden temperature drop, water quality fluctuation impact of inlet water and the like; the biomass in the reactor is further improved, and the impact resistance of the system to water quality fluctuation and temperature fluctuation is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment and water purification, specifically to an improved MBBR water purification process device. Background Technology

[0002] Moving bed biofilm reactor (MBBR) technology is an important technology currently used to solve river water pollution problems. The traditional MBBR process attaches a biofilm to the surface of a suspended carrier material (also known as "packing material"), uses aeration or stirring to provide the system with a sufficient supply of dissolved oxygen, and ensures that the biofilm is in full contact with the wastewater, thereby effectively removing organic pollutants from the wastewater.

[0003] Due to the design limitations of the reactor tank structure, aeration or stirring devices often struggle to reach the "dead zones" within the reactor, preventing effective contact between dissolved oxygen, microorganisms, and organic matter between some carrier materials and the biofilm, thus affecting the stable growth of the biofilm. Simultaneously, the fluctuating river water quality, influenced by factors such as climate, temperature, and environmental pollution, causes the biofilm on the packing surface to easily detach and be lost, further impacting the total biomass and treatment efficiency within the system. Currently, two problems exist: firstly, the activity of microorganisms attached to the MBBR carrier decreases under low-temperature conditions; secondly, under high pollution loads, the biomass within the MBBR reactor is insufficient. Both of these situations lead to deteriorated treatment efficiency and substandard effluent. An improved MBBR water purification process is needed to address this issue. Utility Model Content

[0004] The purpose of this invention is to provide an improved MBBR water purification process device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an improved MBBR water purification process device, comprising an MBBR tank, wherein the MBBR tank is connected to a blower room and an air flotation tank respectively, the MBBR tank and the blower room are connected through an aeration main pipe, and an aeration valve is installed on the aeration main pipe, and an air knife is installed in the MBBR tank, and the air knife is connected to an air knife supply pipe.

[0006] As a preferred embodiment of this utility model, a sludge nozzle hanging beam is fixedly installed on the MBBR tank, and sludge nozzles are installed on the sludge nozzle hanging beam, with the sludge nozzles distributed circumferentially around the MBBR tank.

[0007] As a preferred embodiment of this utility model, a sludge return pipe is installed between the MBBR tank and the flotation tank, and a sludge return pump, a temperature controller and a concentration sensor are respectively installed on the sludge return pipe.

[0008] As a preferred embodiment of this utility model, a carrier baffle wall is installed inside the MBBR tank, and an aeration branch pipe is installed on one side of the carrier baffle wall.

[0009] As a preferred embodiment of this utility model, air knife supply pipes are connected to both ends of the aeration main pipe, and corresponding air knife valves are installed on the air knife supply pipes.

[0010] As a preferred embodiment of this utility model, the air knife is equipped with a plurality of air outlet holes, the diameter of which is 1 / 20 to 1 / 5 of the diameter of the air knife hole.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) This utility model is an improved MBBR water purification process device. The water purification process device set up in this device makes full use of the air supply of the aeration device. The design of the "air knife" pipeline with a perforation diameter much smaller than that of the aeration pipeline achieves a significant increase in air pressure. Then, the high-speed airflow generated by it disturbs the suspended carrier material in the inner "dead zone". Because its perforation diameter is small, it can form effective shear stress on the inner periphery of the reactor. By adding the "air knife" device in the inner periphery of the reactor, the fluidization state of the suspended carrier material in the reactor can be significantly improved. At the same time, the transfer efficiency of dissolved oxygen between the "dead zone" and the reactor is improved. Without excessively increasing the energy supply, the utilization efficiency of the carrier material and its surface biofilm is improved.

[0013] (2) This utility model is an improved MBBR water purification process device. The water purification process device set in this device is based on the traditional moving bed biofilm reactor structure, coupled with an activated sludge internal return device. A temperature controller and a concentration sensor are added to the sludge-water separation section. Under conditions such as sudden temperature drop and fluctuation of influent water quality, some activated sludge is returned to the front end of the moving bed biofilm reactor to further increase the biomass in the reactor and improve the system's resistance to water quality fluctuations and temperature fluctuations. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a modified MBBR water purification process device according to an embodiment of the present utility model;

[0016] Figure 2This is a cross-sectional and front view of an air knife in a modified MBBR water purification process device according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the MBBR tank in an improved MBBR water purification process device according to an embodiment of the present utility model.

[0018] Figure label:

[0019] 1. Aeration main pipe; 2. Air knife supply pipe; 3. Air knife; 4. Sludge return pipe; 5. Sludge return pump; 6. Temperature controller; 7. Concentration sensor; 8. Sludge nozzle hanging beam; 9. Aeration valve; 10. Air knife valve; 11. Air outlet; 12. Sludge nozzle; 13. MBBR tank; 14. Carrier retaining wall; 15. Blower room; 16. Flotation tank; 17. Aeration branch pipe. Detailed Implementation

[0020] The utility model will now be further described with reference to the accompanying drawings and specific embodiments: Example 1

[0021] refer to Figures 1 to 2 Example 1 describes an MBBR tank 13, which is connected to a blower room 15 and a flotation tank 16. The MBBR tank 13 and the blower room 15 are connected by an aeration main pipe 1, and an aeration valve 9 is installed on the aeration main pipe 1. An air knife 3 is installed in the MBBR tank 13, and the air knife 3 is connected to an air knife supply pipe 2. A carrier baffle wall 14 is installed in the MBBR tank 13, and an aeration branch pipe 17 is installed on one side of the carrier baffle wall 14. Air knife supply pipes 2 are connected to both ends of the aeration main pipe 1. Corresponding air knife valves 10 are installed on the air knife 3. Multiple air outlets 11 are installed on the air knife 3, and the diameter of the multiple air outlets 11 is 1 / 20 to 1 / 5 of the diameter of the air knife 3.

[0022] In this embodiment, the diameter of the air outlet 11 is 1 / 20 to 1 / 5 of the diameter of the air knife 3 to ensure that a high-speed airflow is generated to disturb the suspended carrier material in the inner "dead zone". When the packing material around the MBBR tank 13 accumulates, the air knife valve 9 is opened and the aeration valve 9 is closed. The airflow flows from the blower room through the aeration main pipe 1 and the air knife air supply pipe 2 to the air knife 3, and is blown out through the air knife outlet 11. Example 2

[0023] refer to Figure 3Example 2 is described below. This embodiment further describes Example 1 and includes an MBBR tank 13. A sludge nozzle hanging beam 8 is fixedly installed on the MBBR tank 13. Sludge nozzles 12 are installed on the sludge nozzle hanging beam 8 and are distributed in a circular pattern around the MBBR tank 13. A sludge return pipe 4 is installed between the MBBR tank 13 and the flotation tank 16. A sludge return pump 5, a temperature controller 6 and a concentration sensor 7 are respectively installed on the sludge return pipe 4.

[0024] In this embodiment, when the temperature controller 6 senses that the air temperature has dropped to a certain value or the concentration sensor 7 senses that the influent concentration is higher than a certain value, the sludge return pump 5 is turned on, and the sludge from the flotation tank 16 is evenly sprayed into the MBBR tank 13 through the sludge return pipe 4 and the sludge nozzle 12 to replenish the activated sludge content of the MBBR 13 and make up for the problem of reduced treatment efficiency caused by low temperature environment and high load influent.

[0025] In practical applications, the water purification process device of this unit is configured with the following settings based on seasonal temperature changes at the location of use: the start-up and stop-up temperatures of the thermostat 6 are set, for example, the start-up temperature is set to 10℃ and the stop-up temperature is set to 15℃; the start-up and stop-up concentrations of the concentration sensor 7 are set, for example, the start-up concentration is set to COD 350mg / L and the stop-up concentration is set to COD 300mg / L. When the ambient temperature drops to 10℃ or the influent concentration rises to 350mg / L, the sludge return pump 5 will turn on, and the sludge will begin to return from the flotation tank to the MBBR tank 13. Under normal operating conditions, the air intake process is "blower room 15 → aeration main pipe 1 → aeration branch pipe 17", aerating the MBBR tank 13. When suspended carrier material accumulates in the inner "dead zone", the air knife valve 10 is opened and the aeration valve 9 is closed, and the airflow is blown out towards the air knife 3. Because the air outlet 11 of the air knife 3 has a small diameter, the generated high-speed airflow can quickly disperse the accumulated suspended carrier material. After the suspended carrier material in the inner "dead zone" is dispersed and evenly distributed in the MBBR tank, open the aeration valve 9 and close the air knife valve 10, and the air intake system resumes normal operation.

[0026] In the description of this utility model, it should be noted that the terms "top," "bottom," "one side," "the other side," "front," "back," "middle part," "inner," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An improved MBBR water purification process device, characterized in that, The system includes an MBBR tank (13), which is connected to a blower room (15) and an air flotation tank (16). The MBBR tank (13) and the blower room (15) are connected by an aeration main pipe (1), and an aeration valve (9) is installed on the aeration main pipe (1). An air knife (3) is installed in the MBBR tank (13), and the air knife (3) is connected to the air knife supply pipe (2).

2. The improved MBBR water purification process device according to claim 1, characterized in that, The MBBR tank (13) is fixedly installed with a sludge nozzle hanging beam (8), and sludge nozzles (12) are installed on the sludge nozzle hanging beam (8), and the sludge nozzles (12) are distributed in a circle around the MBBR tank (13).

3. The improved MBBR water purification process device according to claim 1, characterized in that, A sludge return pipe (4) is installed between the MBBR tank (13) and the flotation tank (16). A sludge return pump (5), a temperature controller (6) and a concentration sensor (7) are installed on the sludge return pipe (4).

4. The improved MBBR water purification process device according to claim 1, characterized in that, The MBBR tank (13) is equipped with a carrier baffle wall (14), and an aeration branch pipe (17) is installed on one side of the carrier baffle wall (14).

5. The improved MBBR water purification process device according to claim 1, characterized in that, The aeration main pipe (1) is connected to air knife supply pipes (2) at both ends, and corresponding air knife valves (10) are installed on the air knife supply pipes (2).

6. The improved MBBR water purification process device according to claim 1, characterized in that, The air knife (3) is equipped with a plurality of air outlet holes (11), the diameter of which is 1 / 20 to 1 / 5 of the diameter of the air knife (3).

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