MABR membrane device for sewage treatment and use method of MABR membrane device

Abstract

The invention discloses a sewage treatment MABR membrane device and a use method thereof.The sewage treatment MABR membrane device comprises an air inlet pipe, an exhaust pipe, a membrane supporting frame, an MABR membrane assembly, lifting lugs and a water production pipe, the air inlet pipe is used for introducing air into the MABR membrane assembly, the exhaust pipe is used for exhausting waste gas, the membrane supporting frame is used for supporting a membrane element, the MABR membrane assembly is used for treating sewage, and the lifting lugs are used for discharging waste gas; and the lifting lugs are used for mounting and fixing. According to the invention, through modular design, transverse and longitudinal permutation and combination can be realized according to the size of a pool, the membrane area requirement in the required unit volume can be met, and by utilizing the characteristics of high oxygen utilization rate and low pressure of the MABR, an air inlet and outlet pipeline and an equipment bracket are combined into a whole, so that the structure of the equipment and the design of the pipeline and the hollow membrane shell are simplified; the impact of water flow and impurities on the membrane filaments is avoided, and meanwhile, the sufficient contact and exchange of substances in sewage and anoxic and anaerobic membrane layers on the surfaces of the membrane filaments can be ensured, so that the operation efficiency of the MABR membrane device is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of MABR membranes for sewage treatment, and in particular to a MABR membrane device for sewage treatment and a method for using the same. Background Art

[0002] MABR, the full name of which is Membrane Aeration Bioreactor, is a new type of sewage treatment technology that combines gas separation membrane technology and biofilm water treatment technology. In this process, the microbial membrane is attached to the surface of the oxygen-permeable hollow fiber membrane, and air passes through the hollow fiber membrane to supply oxygen to the biofilm. The organic matter and nitrogen and phosphorus in the sewage are adsorbed, absorbed and decomposed by the biofilm, thereby achieving sewage purification and simultaneous nitrification and denitrification. The MABR membrane device improves sewage treatment efficiency, reduces energy consumption and maintenance costs through innovative design and technology, and is suitable for various sewage treatment scenarios, especially high-concentration and decentralized sewage treatment;

[0003] According to Chinese patent application No.: 202123223601.3, a MABR sewage treatment device is disclosed, including a sewage treatment tank, an aeration main pipe and a secondary aeration pipe. The sewage treatment tank is provided with an anaerobic zone, a first MABR reaction zone, a first aerobic zone, a second aerobic zone, a second MABR reaction zone, a third aerobic zone and a fourth aerobic zone connected in sequence. The secondary aeration pipe is respectively arranged in the first MABR reaction zone and the second MABR reaction zone; the first MABR reaction zone and the second MABR reaction zone are respectively provided with an MABR frame that can slide up and down, and the MABR frame is provided with MABR modules that are connected in sequence. By setting the MABR frame to slide up and down, when the MABR module is repaired and replaced, there is no need to evacuate the tank body, and only the MABR frame needs to be lifted up, which greatly reduces the cost and greatly improves the efficiency of repair and replacement;

[0004] The prior art effectively solves the problem that in the sewage treatment device of the MABR module, the MABR module is fixedly installed on some special brackets. When the MABR module is repaired and replaced, the pool where the MABR module is located needs to be evacuated, and the cost of repair and replacement is high and the efficiency is low. It has the advantage of improving the efficiency of repair and replacement, but there are still the following problems in actual use:

[0005] First, the membrane area per unit water body projection area is limited, the aeration efficiency is low, and the modules cannot be stacked in the height direction, resulting in low space utilization;

[0006] Secondly, the membrane filaments sag naturally, and the membrane filaments near the air inlet end will emit more gas, while the membrane filaments at the lowest point and the air outlet end will emit less gas, which will affect the reproduction of nitrifying bacteria near the membrane surface;

[0007] Third, the membrane filaments are not protected by membrane shells, and are prone to breakage, especially when encountering water disturbances or large debris impacts in natural water bodies.

[0008] To this end, we provide a MABR membrane device for sewage treatment to solve the above problems. Summary of the invention

[0009] The purpose of the present invention is to provide a MABR membrane device for sewage treatment and a method of using the same, which has a modular design, simplifies the structure and piping of the equipment and can ensure that the substances in the sewage are fully in contact with and exchanged with the anoxic and anaerobic membrane layers on the surface of the membrane fibers, thereby solving the problems of low space utilization of the MABR module, natural sagging of the membrane fibers, affecting the reproduction of nitrifying bacteria near the surface of the membrane fibers, and easy breakage of the membrane fibers due to the lack of protection of the membrane shell.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: A MABR membrane device for sewage treatment, comprising an air inlet pipe, an exhaust pipe, a membrane support frame, a MABR membrane assembly, a lifting lug and a water production pipe, wherein the air inlet pipe is used to introduce air into the MABR membrane assembly, the exhaust pipe is used to discharge exhaust gas, the membrane support frame is used to provide support for the membrane element, the MABR membrane assembly is used to treat sewage, the lifting lug is used for installation and fixation, the water production pipe is used to discharge treated water, the air inlet pipe, the exhaust pipe, the MABR membrane assembly, the lifting lug and the water production pipe are all installed on the surface of the membrane support frame, the MABR membrane assembly is divided into two rows, and twelve groups are arranged in each row, the air inlet pipe is connected to the air inlet end of the MABR membrane assembly, the exhaust pipe is connected to the exhaust end of the MABR membrane assembly, the water production pipe is connected to the water outlet end of the MABR membrane assembly, and the lifting lug is fixed to the top of the membrane support frame.

[0011] Preferably, the outer side of the MABR membrane assembly is a cylindrical membrane shell with hollow holes, and the inner side is a MABR membrane assembly with bundled MABR membrane filaments.

[0012] Preferably, the membrane support frame coincides with the center of the bottom of the membrane shell, and a circular hole is opened in the middle, which is connected by an ABS short tube with a double sealing ring.

[0013] Preferably, a porous plate is provided at the bottom of the MABR membrane assembly for uniform gas distribution, the top of the MABR membrane assembly is fixed with square steel as a bracket, and a short ABS tube with double sealing rings is connected to the MABR membrane assembly as an air pipe.

[0014] Preferably, the exhaust gas generated by the operation of the MABR membrane module is concentrated through the air pipe and discharged after the exhaust pipe is connected to the pipeline and the valve. The single membrane area of ​​the MABR membrane module is 25m 2 .

[0015] Preferably, the size of the membrane support frame is 2580×410×1706 mm, and the water production pump of the MABR membrane assembly adopts a centrifugal water pump, and its parameters are Q=3m3 / h, H=10m, and N=0.37kw.

[0016] Preferably, the above-mentioned MABR membrane device for sewage treatment is used in wastewater treatment that requires removal of all or part of the pollution indicators such as COD, ammonia nitrogen, total nitrogen, total phosphorus, etc.

[0017] Preferably, the method of use comprises the following steps:

[0018] First, the MABR membrane assembly is installed on the surface of the membrane support frame, and the MABR membrane assembly is supported by the membrane support frame. Then, each group of MABR membrane assemblies is directly connected through pipes. The air inlet pipe is connected to the air inlet end of the MABR membrane assembly, the exhaust pipe is connected to the exhaust end of the MABR membrane assembly, and the water production pipe is connected to the water outlet end of the MABR membrane assembly. The sewage enters the inner cavity of the MABR membrane assembly for filtration treatment. The air inlet pipe is used to provide air or oxygen to the inside of the MABR membrane assembly, and the exhaust pipe is used to discharge the exhaust gas inside the MABR membrane assembly. The MABR membrane assembly The produced water is discharged through the water production pipe. The appearance of the MABR membrane assembly is 160×1624mm, and the outer side is an ABS membrane shell with hollow holes. The MABR hollow fiber membrane filaments are encapsulated with epoxy resin at both ends of the membrane shell. The membrane support frame coincides with the center of the bottom of the membrane shell, and a circular hole is opened in the middle, which is connected by an ABS short tube with a double sealing ring. A porous plate is provided at the bottom of the MABR membrane assembly for uniform gas distribution. The top of the MABR membrane assembly is fixed with square steel as a bracket, and is connected to the MABR membrane assembly as an air pipe with an ABS short tube with a double sealing ring.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention adopts modular design and can be arranged and combined horizontally and vertically according to the size of the water pool to achieve the required membrane area requirement per unit volume. By utilizing the high oxygen utilization rate and low pressure of MABR, the inlet and outlet pipes and the equipment bracket are combined into one, which simplifies the structure and piping of the equipment. The hollow membrane shell design can avoid the impact of water flow and debris on the membrane fibers, while ensuring sufficient contact and exchange between the substances in the sewage and the anoxic and anaerobic membrane layers on the surface of the membrane fibers, thereby effectively improving the operating efficiency of the MABR membrane device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the arrangement of the membrane frame of the present invention.

[0023] In the figure: 1. Air inlet pipe; 2. Exhaust pipe; 3. Membrane support frame; 4. MABR membrane assembly; 5. Lifting ear; 6. Water production pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The air inlet pipe 1, exhaust pipe 2, membrane support frame 3, MABR membrane assembly 4, lifting ear 5 and water production pipe 6 components of the present invention are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods.

[0026] Example 1

[0027] like Figure 1-2 As shown, it is the first embodiment of the present invention, which provides a MABR membrane device for sewage treatment, including an air inlet pipe 1, an exhaust pipe 2, a membrane support frame 3, a MABR membrane assembly 4, a lifting ear 5 and a water production pipe 6. The air inlet pipe 1 is used to introduce air into the MABR membrane assembly 4, the exhaust pipe 2 is used to discharge exhaust gas, the membrane support frame 3 is used to provide support for the membrane element, the MABR membrane assembly 4 is used to treat sewage, the lifting ear 5 is used for installation and fixing, and the water production pipe 6 is used to discharge treated water. The air inlet pipe 1, the exhaust pipe 2, the MABR membrane assembly 4, the lifting ear 5 and the water production pipe 6 are all installed on the surface of the membrane support frame 3. The MABR membrane assembly 4 is divided into two rows, and twelve groups are arranged in each row. The air inlet pipe 1 is connected to the air inlet end of the MABR membrane assembly 4, the exhaust pipe 2 is connected to the exhaust end of the MABR membrane assembly 4, the water production pipe 6 is connected to the water outlet end of the MABR membrane assembly 4, and the lifting ear 5 is fixed to the top of the membrane support frame 3.

[0028] like Figure 1-2As shown, firstly, the MABR membrane assembly 4 is installed on the surface of the membrane support frame 3, and the MABR membrane assembly 4 is supported by the membrane support frame 3, and then each group of MABR membrane assemblies 4 is directly connected through pipelines, the air inlet pipe 1 is connected to the air inlet end of the MABR membrane assembly 4, the exhaust pipe 2 is connected to the exhaust end of the MABR membrane assembly 4, and the water production pipe 6 is connected to the water outlet end of the MABR membrane assembly 4. The sewage enters the inner cavity of the MABR membrane assembly 4 for filtering treatment. The air inlet pipe 1 is used to provide air or oxygen to the inside of the MABR membrane assembly 4, and the exhaust pipe 2 is used to discharge the exhaust gas inside the MABR membrane assembly 4. The water produced by the MABR membrane assembly 4 is discharged through the water production pipe 6. The appearance of the MABR membrane assembly 4 is 160×1624mm, and the outer side is an ABS material membrane shell with hollow holes, and the MABR hollow fiber membrane filaments are encapsulated with epoxy resin at both ends of the membrane shell. The membrane support frame 3 coincides with the center of the bottom of the membrane shell, and a circular hole is opened in the middle, which is connected by an ABS short tube with a double sealing ring. A porous plate is provided at the bottom of the MABR membrane assembly 4 for uniform gas distribution. The top of the MABR membrane assembly 4 is fixed with square steel as a bracket, and an ABS short tube with a double sealing ring is used to connect to the MABR membrane assembly 4 as an air pipe.

[0029] Example 2

[0030] Reference Figure 1-2 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0031] In this embodiment, the appearance of the MABR membrane assembly 4 is 160×1624 mm, and the outer side is an ABS material membrane shell with hollow holes, and the MABR hollow fiber membrane filaments are encapsulated with epoxy resin at both ends of the membrane shell.

[0032] The membrane support frame 3 coincides with the center of the bottom of the membrane shell, and a circular hole is opened in the middle, which is connected by an ABS short tube with double sealing rings.

[0033] A porous plate is provided at the bottom of the MABR membrane assembly 4 for uniform gas distribution. The top of the MABR membrane assembly 4 is fixed with square steel as a bracket, and a short ABS tube with double sealing rings is connected to the MABR membrane assembly 4 as an air pipe.

[0034] The exhaust gas generated by the operation of MABR membrane module 4 is collected through the air pipe and discharged after being connected to the pipeline and valve by exhaust pipe 2. The single membrane area of ​​MABR membrane module 4 is 25m 2 .

[0035] The size of the membrane support frame 3 is 2580×410×1706 mm, and the water production pump of the MABR membrane assembly 4 adopts a centrifugal water pump, and its parameters are Q=3m3 / h, H=10m, and N=0.37kw.

[0036] like Figure 1-2As shown, the appearance of the MABR membrane assembly 4 is 160×1624mm, the outer side is an ABS membrane shell with hollow holes, and the MABR hollow fiber membrane filaments are encapsulated with epoxy resin at both ends of the membrane shell. The membrane support frame 3 coincides with the center of the bottom of the membrane shell, and a circular hole is opened in the middle, which is connected by a short ABS tube with a double sealing ring. A porous plate is provided at the bottom of the MABR membrane assembly 4 for uniform air distribution. The top of the MABR membrane assembly 4 is fixed with square steel as a bracket, and a short ABS tube with a double sealing ring is connected to the MABR membrane assembly 4 as an air pipe. When the effluent water quality is relatively stable during the commissioning, continuous operation for 30 days is carried out, and the average removal rates of effluent COD, NH4+-N, TN, and TP are as follows:

[0037] Test items COD <![CDATA[NH4 + -N]]> TN TP Test results 87％ 93％ 81％ 86％

[0038] A method for using a MABR membrane device for sewage treatment, the method comprising the following steps:

[0039] First, the MABR membrane assembly 4 is installed on the surface of the membrane support frame 3, and the MABR membrane assembly 4 is supported by the membrane support frame 3. Then, each group of MABR membrane assemblies 4 is directly connected through pipelines. The air inlet pipe 1 is connected to the air inlet end of the MABR membrane assembly 4, the exhaust pipe 2 is connected to the exhaust end of the MABR membrane assembly 4, and the water production pipe 6 is connected to the water outlet end of the MABR membrane assembly 4. The sewage enters the inner cavity of the MABR membrane assembly 4 for filtration treatment. The air inlet pipe 1 is used to provide air or oxygen to the inside of the MABR membrane assembly 4, and the exhaust pipe 2 is used to discharge the exhaust gas inside the MABR membrane assembly 4. The water produced by the BR membrane assembly 4 is discharged through the water production pipe 6. The appearance of the MABR membrane assembly 4 is 160×1624mm, and the outer side is an ABS material membrane shell with hollow holes, and the MABR hollow fiber membrane filaments are encapsulated with epoxy resin at both ends of the membrane shell. The membrane support frame 3 coincides with the center of the bottom of the membrane shell, and a circular hole is opened in the middle, which is connected by an ABS short tube with a double sealing ring. A porous plate is provided at the bottom of the MABR membrane assembly 4 for uniform gas distribution. The top of the MABR membrane assembly 4 is fixed with square steel as a bracket, and an ABS short tube with a double sealing ring is used to connect to the MABR membrane assembly 4 as an air pipe.

[0040] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in the field. This application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A MABR membrane device for sewage treatment, comprising an air inlet pipe (1), an exhaust pipe (2), a membrane support frame (3), a MABR membrane assembly (4), a lifting lug (5) and a water production pipe (6), characterized in that: The air inlet pipe (1) is used to introduce air into the MABR membrane assembly (4); the exhaust pipe (2) is used to discharge exhaust gas; the membrane support frame (3) is used to provide support for the membrane element; the MABR membrane assembly (4) is used to treat sewage; the lifting lug (5) is used for installation and fixing; the water production pipe (6) is used to discharge treated water; the air inlet pipe (1), the exhaust pipe (2), the MABR membrane assembly (4), the lifting lug (5) and the water production pipe (6) are all installed on the surface of the membrane support frame (3); the MABR membrane assembly (4) is divided into two rows, and each row is provided with twelve groups; the air inlet pipe (1) is connected to the air inlet end of the MABR membrane assembly (4); the exhaust pipe (2) is connected to the exhaust end of the MABR membrane assembly (4); the water production pipe (6) is connected to the water outlet end of the MABR membrane assembly (4); and the lifting lug (5) is fixed to the top of the membrane support frame (3).

2. A MABR membrane device for sewage treatment according to claim 1, characterized in that: The outer side of the MABR membrane assembly (4) is a cylindrical membrane shell with hollow holes, and the inner side is a MABR membrane assembly with bundled MABR membrane filaments.

3. A MABR membrane device for sewage treatment according to claim 1, characterized in that: The membrane support frame (3) coincides with the center of the bottom of the membrane shell, and a circular hole is provided in the middle, which is connected via an ABS short tube with a double sealing ring.

4. A MABR membrane device for sewage treatment according to claim 1, characterized in that: A porous plate is provided at the bottom of the MABR membrane assembly (4) for uniformly distributing gas. The top of the MABR membrane assembly (4) is fixed with square steel as a bracket, and a short ABS tube with a double sealing ring is connected to the MABR membrane assembly (4) as an air pipe.

5. A MABR membrane device for sewage treatment according to claim 1, characterized in that: The waste gas generated by the operation of the MABR membrane module (4) is collected through the air pipe and discharged after being connected to the pipeline and valve by the exhaust pipe (2). The single membrane area of ​​the MABR membrane module (4) is 25m 2 .

6. A MABR membrane device for sewage treatment according to claim 1, characterized in that: The dimensions of the membrane support frame (3) are 2580×410×1706 mm, and the water production pump of the MABR membrane assembly (4) adopts a centrifugal water pump, and its parameters are Q=3m3 / h, H=10m, and N=0.37kw.

7. The method for using a MABR membrane device for sewage treatment according to claim 1, characterized in that: The method of use includes the following steps: First, the MABR membrane assembly (4) is installed on the surface of the membrane support frame (3), and the MABR membrane assembly (4) is supported by the membrane support frame (3). Then, each group of MABR membrane assemblies (4) are directly connected through pipes, the air inlet pipe (1) is connected to the air inlet end of the MABR membrane assembly (4), the exhaust pipe (2) is connected to the exhaust end of the MABR membrane assembly (4), and the water production pipe (6) is connected to the water outlet end of the MABR membrane assembly (4). Sewage enters the inner cavity of the MABR membrane assembly (4) for filtering treatment. The air inlet pipe (1) is used to provide air or oxygen to the inside of the MABR membrane assembly (4), and the exhaust pipe (2) is used to exhaust the inside of the MABR membrane assembly (4). The waste gas is discharged, and the water produced by the MABR membrane assembly (4) is discharged through the water production pipe (6). The appearance of the MABR membrane assembly (4) is 160×1624 mm, and the outer side is an ABS material membrane shell with hollow holes, and the MABR hollow fiber membrane filaments are encapsulated with epoxy resin at both ends of the membrane shell. The membrane support frame (3) coincides with the center of the bottom of the membrane shell, and a circular hole is opened in the middle, which is connected by an ABS short tube with a double sealing ring. The bottom of the MABR membrane assembly (4) is provided with a porous plate for uniform gas distribution. The top of the MABR membrane assembly (4) is fixed with square steel as a bracket, and is connected to the MABR membrane assembly (4) as an air pipe by an ABS short tube with a double sealing ring.

8. Application of a MABR membrane device for sewage treatment according to any one of claims 1 to 5 in wastewater treatment that requires removal of all or part of the pollution indicators such as COD, ammonia nitrogen, total nitrogen, and total phosphorus.

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