MABR membrane internal oxygen supply efficient sewage treatment reactor

Abstract

The utility model discloses an MABR membrane internal oxygen supply efficient sewage treatment reactor which comprises a reactor body, a membrane assembly and a water distribution disc, and an air main pipe is fixedly connected to the top of the inner side of the reactor body; the membrane assemblies are fixedly connected to the interior of the reactor body and located at the middle section part in the reactor body, and the three groups of membrane assemblies are transversely arranged; the water distribution disc is fixedly connected to the bottom of the inner side of the reactor body, the water distribution disc is composed of a water distribution branch pipe and a water distribution main pipe, and the device realizes formation of an aerobic environment and an anoxic environment in the same reactor, so that synchronous nitrification and denitrification and short-cut nitrification and denitrification are realized, total nitrogen in water is effectively removed, and the water quality is improved. Meanwhile, in order to ensure that inlet water can be uniformly distributed to all membrane wires and the degradation capability of microorganisms is fully exerted, a balanced water distribution system is also arranged, so that the sewage treatment efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to a high-efficiency wastewater treatment reactor with in-membrane oxygen supply in a MABR membrane. Background Technology

[0002] Currently, the wastewater treatment sector faces increasingly stringent discharge standards and ever-increasing demands for treatment efficiency. Traditional wastewater treatment processes, such as oxidation ditches and their variations, while meeting basic wastewater treatment needs to a certain extent, are showing limitations in treatment efficiency as environmental standards continue to rise. To enhance the removal of indicators such as chemical oxygen demand (COD) and total nitrogen (TN), advanced treatment processes such as Bardenpho, multi-stage AO, and MABR (membrane bioreactor) have emerged.

[0003] However, even though these processes have achieved certain results in improving treatment efficiency, many challenges remain. For example, while the MABR process combines the advantages of membrane separation and biological treatment technologies, its operating costs are relatively high, especially in terms of aeration energy consumption and membrane cleaning and maintenance. Furthermore, in traditional MABR processes, microorganisms typically exist in a suspended state, which to some extent limits the contact efficiency between microorganisms and pollutants, thus affecting the treatment effect. Therefore, to address the aforementioned technical problems, a high-efficiency wastewater treatment reactor with in-membrane oxygen supply is proposed here. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency wastewater treatment reactor with in-membrane oxygen supply, which realizes the formation of aerobic and anoxic environments within the same reactor, thereby achieving simultaneous nitrification and denitrification as well as short-cut nitrification and denitrification. This effectively removes total nitrogen from the water and significantly improves oxygen transfer efficiency while reducing the energy consumption of aeration blowers. In addition, to ensure that the influent can be evenly distributed to all membrane fibers and fully utilize the degradation capacity of microorganisms, a balanced water distribution system is also set up, further improving wastewater treatment efficiency.

[0005] This utility model is achieved through the following technical solution:

[0006] A high-efficiency wastewater treatment reactor with in-membrane oxygen supply, comprising:

[0007] The reactor body has an air main pipe fixedly connected to its inner top;

[0008] The membrane module is fixedly connected to the inside of the reactor body and is located in the middle section of the reactor body. There are three sets of membrane modules arranged in a horizontal manner.

[0009] The water distribution plate is fixedly connected to the bottom inner side of the reactor body, and the water distribution plate consists of water distribution branch pipes and water distribution main pipes.

[0010] Preferably, the membrane assembly consists of an outer frame and membrane fibers. The outer frame is made of stainless steel square steel welded together, and the interior of the outer frame has a cavity.

[0011] Preferably, a membrane filament is fixedly installed inside the cavity.

[0012] Preferably, the number of membrane filaments is several groups arranged laterally.

[0013] Preferably, a biofilm is attached to the outside of the membrane filaments, and micropores are formed on the outside of the membrane filaments.

[0014] Preferably, an air supply pipe is fixedly connected to the outside of the outer frame, and the air supply pipe is connected to the main air supply pipe.

[0015] Preferably, there is one set of main water distribution pipes and multiple sets of branch water distribution pipes, all of which are connected to the main water distribution pipe.

[0016] The technical solution of this utility model has at least the following beneficial effects:

[0017] This MABR (Membrane Bioreactor) high-efficiency wastewater treatment reactor features a unique membrane module design. The module is composed of multiple membrane filaments with a biofilm growing on their outer surface. Compared to the traditional activated sludge process, the biofilm method offers higher microbial biomass and treatment efficiency. Furthermore, this invention enables the creation of both aerobic and anoxic environments within the same reactor, achieving simultaneous nitrification / denitrification and short-cut nitrification / denitrification, effectively removing total nitrogen from the water. In addition, the membrane module features small pore size and high oxygen utilization, significantly improving oxygen transfer efficiency and reducing the energy consumption of the aeration blower. To ensure even distribution of influent to all membrane filaments and fully utilize the degradation capabilities of the microorganisms, a balanced water distribution system is also implemented, further enhancing wastewater treatment efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the first partial structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the second partial structure of the present invention;

[0021] Figure 4 This is a top view of the present invention;

[0022] Icons: 1. Reactor body; 2. Main air pipe; 3. Membrane module; 4. External frame; 5. Cavity; 6. Membrane fiber; 7. Gas delivery pipe; 8. Water distribution tray; 9. Water distribution branch pipe; 10. Main water distribution pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Example

[0025] Please see Figure 1-4 The present application proposes a high-efficiency wastewater treatment reactor with in-membrane oxygen supply, including a reactor body 1, a membrane module 3 and a water distribution plate 8. An air main pipe 2 is fixedly connected to the top of the inner side of the reactor body 1. The reactor body 1 is made of welded metal materials.

[0026] The membrane module 3 is fixedly connected to the inside of the reactor body 1, and the membrane module 3 is located in the middle section of the reactor body 1. There are three sets of membrane modules 3 arranged horizontally.

[0027] The water distribution plate 8 is fixedly connected to the bottom inner side of the reactor body 1, and the water distribution plate 8 is composed of water distribution branch pipes 9 and water distribution main pipes 10.

[0028] The membrane module 3 consists of an outer frame 4 and membrane fibers 6. The outer frame 4 is made of stainless steel square steel welded together. A cavity 5 is opened inside the outer frame 4, and the membrane fibers 6 are fixedly installed inside the cavity 5.

[0029] The membrane filaments 6 are in several groups and arranged laterally. A biofilm is attached to the outside of the membrane filaments 6, and micropores are formed on the outside of the membrane filaments 6.

[0030] An air supply pipe 7 is fixedly connected to the external frame 4, and the air supply pipe 7 is connected to the main air supply pipe 2. One set of water distribution main pipe 10 is provided, and multiple sets of water distribution branch pipes 9 are provided. All sets of water distribution branch pipes 9 are connected to the main water distribution main pipe 10.

[0031] The working principle of the MABR membrane oxygen supply high-efficiency wastewater treatment reactor based on the embodiment is that the membrane module 3 is encapsulated by multiple membrane filaments 6, and a biofilm grows on the outside of the membrane filaments 6. Through the metabolism of microorganisms, pollutants in the water are decomposed and removed. The amount of microorganisms growing on the surface of the membrane filaments 6 is much higher than that of activated sludge in the activated sludge process. Therefore, the wastewater treatment efficiency of the biofilm method is higher than that of the activated sludge method.

[0032] Unlike traditional biofilm processes, this method utilizes cavity 5 to transfer air and supplies oxygen to the biofilm through micropores on the surface of membrane filaments 6, thus providing the oxygen required for microbial respiration.

[0033] Oxygen concentration decreases from membrane fiber 6 towards the wastewater side. The oxygen concentration is high near membrane fiber 6, forming a nitrification zone. Nitrifying bacteria nitrify ammonia nitrogen in the wastewater into nitrate nitrogen. The oxygen concentration is low on the wastewater side, forming an anoxic zone. Denitrifying bacteria use organic matter in the wastewater to convert nitrate nitrogen into nitrogen gas, achieving the purpose of nitrogen removal. Aerobic and anoxic environments can be formed in the same reactor, realizing simultaneous nitrification and denitrification as well as short-cut nitrification and denitrification, completing the removal of total nitrogen. The organic matter concentration in the raw water decreases from the wastewater side towards the membrane surface. Carbon source is preferentially used by denitrifying bacteria for denitrification to remove total nitrogen. The effective utilization rate of carbon source is higher than that of the traditional activated sludge process, which can save the cost of adding external carbon source.

[0034] Because the membrane surface can form both aerobic and anoxic environments, simultaneous nitrification and denitrification, as well as short-cut nitrification and denitrification, can be achieved without nitrification liquor recirculation, thus removing total nitrogen. Traditional activated sludge processes require pumping 3-4 times the influent volume back to the front end to remove total nitrogen; therefore, this reactor eliminates the recirculation pump, further reducing operating energy consumption.

[0035] Traditional membrane microporous aerators have an aeration pore size of about 100 micrometers and an overall oxygen utilization rate of about 15% to 20%. However, the internal oxygen supply membrane used in this application has a pore size of only 1 to 10 micrometers and an overall oxygen utilization rate of over 50%. The oxygen transfer efficiency is far higher than that of traditional membrane microporous aerators. The direct result is that the power consumption of the aeration blower can be reduced by 50%, which greatly saves the energy consumption of the aeration blower.

[0036] Unlike the suspended growth of activated sludge, the microorganisms in biofilm processes grow in a fixed manner. Therefore, one of the important factors affecting the wastewater treatment efficiency is the uniformity of water distribution. Only when the influent is evenly distributed to all membrane fibers 6 can the degradation capacity of the microorganisms be fully utilized. This application sets up a balanced water distribution system, with each water distribution plate 8 having the same service range and the same pipe length from the main influent pipe to all water distribution plates 8. This ensures that the head loss of the pipeline between the main water supply and all water distribution plates 8 is consistent, and the water distribution flow rate of each water distribution plate 8 is consistent, thereby achieving the purpose of evenly distributing the raw water to the membrane module 3.

[0037] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency wastewater treatment reactor with in-membrane oxygen supply, characterized in that, include: The reactor body (1) has an air main pipe (2) fixedly connected to its inner top; Membrane module (3) is fixedly connected to the inside of reactor body (1), and the membrane module (3) is located in the middle section of the inside of reactor body (1). The number of membrane modules (3) is three and arranged in a horizontal manner. The water distribution plate (8) is fixedly connected to the bottom of the inner side of the reactor body (1), and the water distribution plate (8) is composed of water distribution branch pipe (9) and water distribution main pipe (10).

2. The MABR membrane in-membrane oxygen supply high-efficiency wastewater treatment reactor according to claim 1, characterized in that: The membrane module (3) consists of an outer frame (4) and membrane fibers (6). The outer frame (4) is made of stainless steel square steel welded together, and a cavity (5) is opened inside the outer frame (4).

3. The MABR membrane in-membrane oxygen supply high-efficiency wastewater treatment reactor according to claim 2, characterized in that: A membrane filament (6) is fixedly installed inside the cavity (5).

4. The MABR membrane in-membrane oxygen supply high-efficiency wastewater treatment reactor according to claim 3, characterized in that: The number of membrane filaments (6) is several groups arranged in a transverse manner.

5. The MABR membrane oxygen supply high-efficiency wastewater treatment reactor according to claim 4, characterized in that: A biofilm is attached to the outside of the membrane filament (6), and micropores are formed on the outside of the membrane filament (6).

6. The MABR membrane in-membrane oxygen supply high-efficiency wastewater treatment reactor according to claim 5, characterized in that: The external frame (4) is fixedly connected to an air supply pipe (7), and the air supply pipe (7) is connected to the main air supply pipe (2).

7. The MABR membrane in-membrane oxygen supply high-efficiency wastewater treatment reactor according to claim 6, characterized in that: The main water distribution pipe (10) is provided in one set, and the branch water distribution pipes (9) are provided in multiple sets, all of which are connected to the main water distribution pipe (10).

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