A method for manufacturing a membrane aerated biofilm reactor (MABR)

Abstract

The present invention discloses a method for making a membrane aerated biofilm reactor (MABR), which specifically includes the following steps: step one, gas phase construction; step two, biofilm construction; step three, drive construction; the present invention relates to the technical field of biofilm reactors. The method for making the membrane aerated biofilm reactor (MABR) uses two groups of aeration membrane components to construct a gas phase inner cavity in a reaction tube, and uses the setting of a filling mesh frame to form a layer of biofilm structure, cooperates with the setting of a rotating carrier frame to fill a plurality of biological carriers to form a two-layer biofilm structure, cooperates with a driving component to ensure that the biological carriers on the rotating carrier frame can rotate in the reaction tube, thereby ensuring the uniformity of the growth of the bacterial community on the two-layer biofilm structure, and constructs the reaction tube through two half-tubes, providing convenient conditions for the disassembly, assembly and replacement of the biofilm structure.

Description

Technical Field

[0001] The invention relates to the technical field of biofilm reactors, in particular to a method for manufacturing a membrane aerated biofilm reactor (MABR). Background Art

[0002] Membrane aerated biofilm reactor, or MABR, is a novel membrane-biological treatment combination process. In MABR, the aeration membrane not only provides aeration but also serves as a carrier for biofilm growth. The oxygen in the gas phase (inner cavity of the aeration membrane) diffuses into the biofilm through the membrane / biofilm interface, while the substrate in the liquid phase (wastewater) enters the biofilm from the biofilm / liquid phase interface. The outstanding features of MABR are bubble-free aeration and the functional active stratification of the biofilm caused by the heterogeneous mass transfer of oxygen and substrate, which has obvious advantages in the treatment of wastewater with high oxygen demand, high ammonia nitrogen, and volatile pollutants.

[0003] Conventional membrane aerated biofilm reactors directly utilize aeration membranes in combination with biofilms, wherein the biofilm is arranged on the liquid side of the aeration membrane. The biofilm structure is fixed in design and cannot be easily replaced. In real-time use, uneven bacterial communities in the biofilm are prone to occur, affecting the sewage treatment effect. For this reason, a method for manufacturing a membrane aerated biofilm reactor (MABR) is proposed, and a rotating biofilm structure is designed to ensure uniform growth of the bacterial community while providing convenient conditions for the convenient replacement of the biofilm. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the present invention provides a method for manufacturing a membrane aerated biofilm reactor (MABR), which solves the problem that conventional biofilms cannot be easily replaced and the surviving bacteria in the biofilms are prone to unevenness, thus affecting the sewage treatment effect.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented by the following technical scheme: a method for manufacturing a membrane aerated biofilm reactor (MABR), specifically comprising the following steps:

[0008] Step 1: gas phase construction: prepare two half cylinders, fix them with bolts to form a reaction cylinder, set two sets of aeration membrane assemblies in the reaction cylinder, wherein the two sets of aeration membrane assemblies are arranged in parallel to form a gas phase inner cavity, and set an air inlet pipe connected to the gas phase inner cavity on one half cylinder;

[0009] Step 2, biofilm construction: a filling net frame filled with bioceramic filler is arranged on the opposite side of the two aeration membrane components, and an embedding groove is arranged in the inner arc surface of the half cylinder for the filling net frame to be assembled, and a turntable carrier frame is arranged on the side of the filling net frame away from the aeration membrane component. After the biological carrier is filled in the turntable carrier frame, a biofilm structure is formed;

[0010] Step 3: Drive construction: a drive assembly is set on one half cylinder to drive the turntable carrier frame to rotate.

[0011] By adopting the above technical scheme, a gas phase inner cavity is constructed in the reaction cylinder by using two groups of aeration membrane components, and a filling mesh frame is used to form a layer of biofilm structure. In conjunction with the setting of a rotating carrier frame, a number of biological carriers are filled to form a two-layer biofilm structure. In conjunction with the driving component, it is ensured that the biological carriers on the rotating carrier frame can rotate in the reaction cylinder, thereby ensuring the uniformity of the growth of the bacterial community on the two-layer biofilm structure. The reaction cylinder is constructed by two half cylinders, providing convenient conditions for the disassembly, assembly and replacement of the biofilm structure.

[0012] The present invention is further configured as follows: a sealing semicircular groove is provided on one side opposite to the two half cylinders, and a sealing strip is filled between the two sealing semicircular grooves.

[0013] By adopting the above technical solution, the sealing strip and the sealing semicircular groove are arranged in coordination to ensure the sealing effect of the reaction cylinder formed by the two half cylinders being butted together.

[0014] The present invention is further configured as follows: both sides of the two half cylinders are fixedly connected with fixing plates, and the two fixing plates are fixedly connected by bolts.

[0015] The present invention is further configured as follows: the aeration membrane assembly comprises a containing ring, an aeration membrane body, a wear-resistant breathable fabric and a clamping ring; one side of the aeration membrane body contacts one side of the wear-resistant breathable fabric; the aeration membrane body and the wear-resistant breathable fabric are both sleeved on the outer circumference of the containing ring; the clamping ring is arranged inside the containing ring; the clamping ring is used to clamp the aeration membrane body and the wear-resistant breathable fabric; the inner arc surface of the half cylinder is located between the two aeration membrane assemblies and is fixedly connected with an arc-shaped limit block, which is used to cooperate with the filling mesh frame to ensure the stability of the aeration membrane assembly structure.

[0016] By adopting the above technical solution, wear-resistant and breathable fabric is used as the installation carrier of the aeration membrane body, which ensures the long-term and stable use of the aeration membrane. At the same time, with the cooperation of the clamping ring and the containing ring, the aeration membrane body and the wear-resistant and breathable fabric are easily installed, providing convenient conditions for the easy replacement of the aeration membrane body.

[0017] The present invention is further configured as follows: the turntable-type carrier frame includes a rotating shaft, one side of the rotating shaft is fixedly connected to a driving shaft, a plurality of mesh plates are evenly fixedly connected to the outer circumference of the rotating shaft, a side of the mesh plate away from the rotating shaft is in sliding contact with the inner arc surface of the reaction cylinder, a fan-shaped inserted mesh frame is slidably connected between two adjacent mesh plates, the interior of the fan-shaped inserted mesh frame is filled with biological carriers, and the outer arc surface of the fan-shaped inserted mesh frame is in sliding contact with the inner arc surface of the reaction cylinder.

[0018] By adopting the above technical scheme, a number of mesh plates are used to support the fan-shaped insertion mesh frame, the position of the fan-shaped insertion mesh frame is limited in cooperation with the reaction tube, and the setting of the rotating shaft and the driving shaft is coordinated to provide convenient conditions for the rotation of the mesh plate, thereby making the bacterial colony on the fan-shaped insertion mesh frame grow evenly and providing convenient conditions for the replacement of a single fan-shaped insertion mesh frame.

[0019] The present invention is further configured as follows: the driving component includes two docking plates, the bottoms of the two docking plates are respectively fixedly connected to the front and rear sides of the outer arc surface of a half-cylinder, the top of the front side of the docking plate arranged on the front side is fixedly connected to a driving motor through a connecting frame, the output end of the driving motor is fixedly connected to a linkage shaft through a coupling, one end of the linkage shaft passes through the two docking plates, the outer periphery of the linkage shaft and the side opposite to the two docking plates are sleeved and fixedly connected with a first pulley, the end of the driving shaft away from the rotating shaft passes through the reaction cylinder and is fixedly connected with a second pulley, and the first pulley and the second pulley are connected by belt transmission.

[0020] The present invention is further configured as follows: a semicircular hole adapted to the drive shaft is opened on opposite sides of the two half-cylinders, a replacement door is provided on both front and rear sides of the outer arc surface of one of the half-cylinders, the replacement door is constructed of a mesh plate, and supporting foot plates are fixedly connected to both front and rear sides of the bottom of the outer arc surface of the other half-cylinder.

[0021] By adopting the above technical solution, the driving motor is used to drive the linkage shaft to rotate, and the first pulley, the second pulley and the belt are coordinated to ensure the effective rotation of the driving shaft. While being easy to use, the setting of the semicircular hole further ensures the convenient disassembly and assembly of the entire device.

[0022] The present invention is further configured as follows: water inlet mesh holes are provided on the surfaces of the two half cylinders and on the opposite sides of the two aeration membrane components.

[0023] By adopting the above technical solution and utilizing the setting of the water inlet mesh, effective contact between the liquid sewage and the fan-shaped inserted mesh frame and the filling mesh frame is ensured, thereby ensuring that the double biofilm formed by the fan-shaped inserted mesh frame and the filling mesh frame effectively decomposes and treats organic matter in the sewage.

[0024] (III) Beneficial effects

[0025] The present invention provides a method for manufacturing a membrane aerated biofilm reactor (MABR). It has the following beneficial effects:

[0026] (1) The present invention constructs a gas phase inner cavity in a reaction cylinder by using two groups of aeration membrane components, and uses the setting of a filling mesh frame to form a layer of biofilm structure. In conjunction with the setting of a rotating carrier frame, a plurality of biological carriers are filled to form a two-layer biofilm structure. In conjunction with a driving component, it is ensured that the biological carriers on the rotating carrier frame can rotate in the reaction cylinder, thereby ensuring the uniformity of the growth of bacteria on the two-layer biofilm structure. The reaction cylinder is constructed by two half cylinders, which provides convenient conditions for the disassembly, assembly and replacement of the biofilm structure.

[0027] (2) The present invention utilizes wear-resistant and breathable fabric as a mounting carrier of the aeration membrane, thereby ensuring long-term stable use of the aeration membrane. At the same time, with the cooperation of the clamping ring and the containing ring, the aeration membrane and the wear-resistant and breathable fabric are ensured to be conveniently installed, providing convenient conditions for convenient replacement of the aeration membrane.

[0028] (3) The present invention utilizes a plurality of mesh plates to support the fan-shaped insert mesh frame, cooperates with the reaction tube to limit the position of the fan-shaped insert mesh frame, and cooperates with the setting of the rotating shaft and the driving shaft to provide convenient conditions for the rotation of the mesh plates, thereby making the bacterial colony on the fan-shaped insert mesh frame grow evenly and providing convenient conditions for the replacement of a single fan-shaped insert mesh frame.

[0029] (4) The present invention utilizes a driving motor to drive the linkage shaft to rotate, and cooperates with the first pulley, the second pulley and the belt to ensure the effective rotation of the driving shaft. While being easy to use, the arrangement of the semicircular hole further ensures the convenient disassembly and assembly of the entire device.

[0030] (5) The present invention ensures effective contact between the liquid sewage and the fan-shaped inserted mesh frame and the filling mesh frame by utilizing the setting of the water inlet mesh, thereby ensuring that the double biofilm formed by the fan-shaped inserted mesh frame and the filling mesh frame effectively decomposes and treats organic matter in the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the internal structure of the half cylinder of the present invention;

[0034] Figure 4 It is a connection diagram of the rotating shaft, the screen plate, and the fan-shaped insertion screen frame structure of the present invention;

[0035] Figure 5is a cross-sectional view of an aeration membrane assembly of the present invention;

[0036] Figure 6 It is a cross-sectional view of the structure of the containing ring, the aeration membrane, the wear-resistant and breathable fabric and the clamp ring of the present invention;

[0037] Figure 7 It is a schematic diagram of the connection between the biological carrier and the fan-shaped insertion frame structure of the present invention;

[0038] In the figure, 1, half cylinder; 2, reaction cylinder; 3, aeration membrane assembly; 4, gas phase inner cavity; 5, air inlet pipe; 6, filling mesh frame; 7, embedded groove; 8, turntable carrier frame; 9, biological carrier; 10, water inlet mesh; 11, driving assembly; 12, sealed semicircular groove; 13, sealing strip; 14, fixing plate; 15, holding ring; 16, aeration membrane body; 17, wear-resistant and breathable fabric; 18, snap ring; 19, rotating shaft; 20, driving shaft; 21, mesh plate; 22, fan-shaped insertion mesh frame; 23, docking plate; 24, driving motor; 25, linkage shaft; 26, first pulley; 27, second pulley; 28, belt; 29, semicircular hole; 30, replacement door; 31, supporting foot plate. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0040] See also Figure 1-7 The embodiment of the present invention provides the following technical solution: a membrane aeration biofilm reactor, as shown in the attached Figure 1 and attached Figure 2 As shown, the reaction cylinder 2 comprises two half cylinders 1 . Specifically, fixing plates 14 are fixedly connected to both sides of the two half cylinders 1 , and the two fixing plates 14 are fixedly connected by bolts.

[0041] As a further explanation, in order to ensure the sealing effect after the two half cylinders 1 are connected, sealing semicircular grooves 12 are opened on the opposite sides of the two half cylinders 1, and a sealing strip 13 is filled between the two sealing semicircular grooves 12.

[0042] As a preferred solution, Figure 1 and attached Figure 2 As shown, two groups of aeration membrane assemblies 3 are arranged in the reaction cylinder 2, wherein the two groups of aeration membrane assemblies 3 are arranged in parallel to form a gas phase inner cavity 4, and an air inlet pipe 5 connected to the gas phase inner cavity 4 is arranged on one half cylinder 1.

[0043] In order to ensure the long-term stable use and convenient replacement of the aeration membrane assembly 3, as shown in the attached Figure 5 and attached Figure 6As shown, the aeration membrane assembly 3 includes a containing ring 15, an aeration membrane body 16, a wear-resistant breathable fabric 17 and a clamping ring 18. One side of the aeration membrane body 16 is in contact with one side of the wear-resistant breathable fabric 17. The aeration membrane body 16 and the wear-resistant breathable fabric 17 are both sleeved on the outer circumference of the containing ring 15. The clamping ring 18 is arranged inside the containing ring 15. The clamping ring 18 is used to clamp the aeration membrane body 16 and the wear-resistant breathable fabric 17.

[0044] As a preferred solution, in order to realize the construction of biofilm, Figure 3 As shown, an embedding groove 7 is provided in the inner arc surface of the half cylinder 1, and the embedding groove 7 is used to assemble the filling net frame 6, wherein the filling net frame 6 is filled with bioceramic fillers to form a layer of biofilm.

[0045] As a preferred solution, in order to construct a double biofilm and further ensure the uniformity of the growing bacterial community, a turntable carrier frame 8 is provided on the side of the filling frame 6 away from the aeration membrane assembly 3. Specifically, as shown in the attached Figure 2 As shown, the turntable carrier frame 8 includes a rotating shaft 19, one side of the rotating shaft 19 is fixedly connected to a driving shaft 20, and the outer periphery of the rotating shaft 19 is evenly fixedly connected to a plurality of mesh plates 21, the side of the mesh plate 21 away from the rotating shaft 19 is in sliding contact with the inner arc surface of the reaction tube 2, and a fan-shaped inserted mesh frame 22 is slidably connected between two adjacent mesh plates 21, the interior of the fan-shaped inserted mesh frame 22 is filled with biological carriers 9, and the outer arc surface of the fan-shaped inserted mesh frame 22 is in sliding contact with the inner arc surface of the reaction tube 2.

[0046] As a preferred solution, in order to realize the rotation drive of the fan-shaped insertion screen frame 22, a driving assembly 11 is set on one half cylinder 1 to drive the turntable carrier frame 8 to rotate. Specifically, as shown in the attached Figure 1 As shown, the driving assembly 11 includes two docking plates 23, the bottoms of the two docking plates 23 are fixedly connected to the front and rear sides of the outer arc surface of a half cylinder 1 respectively, and the top of the front side of the docking plate 23 arranged on the front side is fixedly connected to a driving motor 24 through a connecting frame. The driving motor 24 is electrically connected to an external power supply and is controlled by a control switch. The output end of the driving motor 24 is fixedly connected to a linkage shaft 25 through a coupling, and one end of the linkage shaft 25 passes through the two docking plates 23. The outer periphery of the linkage shaft 25 and the side opposite to the two docking plates 23 are sleeved and fixedly connected with a first pulley 26. The end of the driving shaft 20 away from the rotating shaft 19 passes through the reaction cylinder 2 and is fixedly connected with a second pulley 27. The first pulley 26 and the second pulley 27 are connected by a belt 28.

[0047] Further explanation, in order to facilitate the assembly of the drive shaft 20, as shown in the attached Figure 1 and attached Figure 3 As shown, a semicircular hole 29 adapted to the driving shaft 20 is formed on opposite sides of the two half cylinders 1 .

[0048] As a preferred solution, in order to facilitate the convenient replacement of the fan-shaped insertion screen frame 22, as shown in the attached Figure 1 As shown, a replacement door 30 is provided on both the front and rear sides of the outer arc surface of a half cylinder 1.

[0049] Furthermore, in order to ensure the stability of the device, the front and rear sides of the bottom of the outer arc surface of the other half cylinder 1 are fixedly connected with support foot plates 31, as shown in the attached Figure 1 As shown, a mounting plate is fixedly connected to the bottom of the supporting foot plate 31, and a mounting hole is provided on the mounting plate.

[0050] As a preferred solution, in order to ensure effective contact between the primary biofilm and the secondary biofilm and the liquid sewage, water inlet meshes 10 are provided on the surfaces of the two half cylinders 1 and on the opposite sides of the two aeration membrane assemblies 3 .

[0051] A method of using a membrane aeration biofilm reactor is as follows:

[0052] Use bolts to pass through the mounting holes and fix the mounting plate in the sewage pool, so that the reaction cylinder 2 is immersed or half immersed in the sewage, the driving motor 24 is above the sewage, and the air inlet pipe 5 is connected to the external air supply device. After the installation is completed, it can be used;

[0053] During use, sewage passes through the water inlet mesh 10 and contacts the fan-shaped insert mesh frame 22 and the filling mesh frame 6. The external air supply device introduces air into the gas phase inner cavity 4 through the air inlet pipe 5. The air penetrates into the filling mesh frame 6 and the fan-shaped insert mesh frame 22 through the wear-resistant breathable fabric 17 and the aeration membrane body 16. A biofilm is formed on the surface of the filling mesh frame 6 filled with bioceramic fillers to degrade organic matter in the sewage. A double biofilm is formed on the surface of the fan-shaped insert mesh frame 22 filled with biological carriers 9 to degrade organic matter in the sewage.

[0054] The drive motor 24 has two working modes:

[0055] First, after the working setting time, the driving motor 24 is started, and the driving motor 24 drives the linkage shaft 25 to rotate the first pulley 26, and drives the second pulley 27 to rotate through the belt 28, so that the driving shaft 20 drives the rotating shaft 19 to rotate a quarter to a half of a circle, and adjusts the position of the fan-shaped insertion screen frame 22;

[0056] Secondly, the driving motor 24 is directly started to ensure the continuous rotation of the fan-shaped insertion screen frame 22.

Claims

1. A method for manufacturing a membrane aerated biofilm reactor (MABR), characterized in that: The specific steps include: Step 1, gas phase construction: prepare two half cylinders (1), fix them with bolts to form a reaction cylinder (2), set two groups of aeration membrane assemblies (3) in the reaction cylinder (2), wherein the two groups of aeration membrane assemblies (3) are arranged in parallel to form a gas phase inner cavity (4), and set an air inlet pipe (5) connected to the gas phase inner cavity (4) on one half cylinder (1); Step 2, biofilm construction: a filling net frame (6) filled with bioceramic filler is arranged on the opposite side of the two aeration membrane components (3), and an embedding groove (7) is arranged in the inner arc surface of the half cylinder (1) for assembling the filling net frame (6), and a turntable carrier frame (8) is arranged on the side of the filling net frame (6) away from the aeration membrane components (3). After the biological carrier (9) is filled into the turntable carrier frame (8), a biofilm structure is formed; Step 3: Drive construction: a drive assembly (11) is arranged on one half cylinder (1) to drive the turntable carrier frame (8) to rotate.

2. The method for manufacturing a membrane aerated biofilm reactor (MABR) according to claim 1, characterized in that: A sealing semicircular groove (12) is provided on one side opposite to the two half cylinders (1), and a sealing strip (13) is filled between the two sealing semicircular grooves (12).

3. The method for manufacturing a membrane aerated biofilm reactor (MABR) according to claim 1, characterized in that: Both sides of the two half cylinders (1) are fixedly connected with fixing plates (14), and the two fixing plates (14) are fixedly connected by bolts.

4. The method for manufacturing a membrane aerated biofilm reactor (MABR) according to claim 1, characterized in that: The aeration membrane assembly (3) comprises a containing ring (15), an aeration membrane body (16), a wear-resistant breathable fabric (17) and a clamping ring (18); one side of the aeration membrane body (16) contacts one side of the wear-resistant breathable fabric (17); the aeration membrane body (16) and the wear-resistant breathable fabric (17) are both sleeved on the outer circumference of the containing ring (15); the clamping ring (18) is arranged inside the containing ring (15); and the clamping ring (18) is used to clamp the aeration membrane body (16) and the wear-resistant breathable fabric (17).

5. The method for manufacturing a membrane aerated biofilm reactor (MABR) according to claim 1, characterized in that: The turntable carrier frame (8) comprises a rotating shaft (19), one side of the rotating shaft (19) is fixedly connected to a driving shaft (20), the outer periphery of the rotating shaft (19) is evenly spaced and fixedly connected to a plurality of mesh plates (21), the side of the mesh plates (21) away from the rotating shaft (19) is in sliding contact with the inner arc surface of the reaction cylinder (2), a fan-shaped insertion mesh frame (22) is slidably connected between two adjacent mesh plates (21), the interior of the fan-shaped insertion mesh frame (22) is filled with biological carriers (9), and the outer arc surface of the fan-shaped insertion mesh frame (22) is in sliding contact with the inner arc surface of the reaction cylinder (2).

6. The method for manufacturing a membrane aerated biofilm reactor (MABR) according to claim 5, characterized in that: The driving assembly (11) comprises two docking plates (23), the bottoms of the two docking plates (23) are respectively fixedly connected to the front and rear sides of the outer arc surface of a half cylinder (1), the top of the front side of the docking plate (23) arranged at the front side is fixedly connected to a driving motor (24) through a connecting frame, the output end of the driving motor (24) is fixedly connected to a linkage shaft (25) through a coupling, one end of the linkage shaft (25) passes through the two docking plates (23), the outer periphery of the linkage shaft (25) and the side opposite to the two docking plates (23) are sleeved and fixedly connected with a first pulley (26), the end of the driving shaft (20) away from the rotating shaft (19) passes through the reaction cylinder (2) and is fixedly connected with a second pulley (27), and the first pulley (26) and the second pulley (27) are connected by a belt (28) for transmission.

7. The method for manufacturing a membrane aerated biofilm reactor (MABR) according to claim 1, characterized in that: A semicircular hole (29) adapted to the drive shaft (20) is provided on opposite sides of the two half cylinders (1); a replacement door (30) is provided on both front and rear sides of the outer arc surface of one half cylinder (1); and a supporting foot plate (31) is fixedly connected to both front and rear sides of the bottom of the outer arc surface of the other half cylinder (1).

8. The method for manufacturing a membrane aerated biofilm reactor (MABR) according to claim 1, characterized in that: Water inlet mesh holes (10) are provided on the surfaces of the two half cylinders (1) and on the opposite sides of the two aeration membrane assemblies (3).

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