Mbr membrane bioreactor for wastewater treatment

Abstract

The application relates to the field of wastewater treatment, and particularly relates to a MOBR membrane bioreactor for wastewater treatment. The MOBR membrane bioreactor comprises a treatment box and rectangular frames which are equidistantly arranged in the treatment box; the treatment box is provided with a first water inlet pipe and a first water outlet pipe; membrane bodies are arranged on the two sides of the rectangular frames; a cleaning mechanism for cleaning the membrane bodies is arranged in the rectangular frames; a strip-shaped through slot is arranged at the upper end of the rectangular frame; the cleaning mechanism comprises a strip-shaped box which is slidingly arranged in the corresponding strip-shaped through slot; a plurality of vertically downward exhaust cylinders are arranged on the strip-shaped box; exhaust holes are arranged on the exhaust cylinders; a plurality of sleeve pipes are arranged in the rectangular frame and sleeved on the exhaust cylinders; air closing holes are arranged on the sleeve pipes; and a sewage discharge mechanism for plugging and opening the gaps between the adjacent rectangular frames and between the rectangular frames and the inner wall of the treatment box is further arranged in the treatment box. The membrane bodies can be cleaned through the exhaust holes, and impurities can be isolated through the sewage discharge mechanism, so that the treatment effect of the membrane bodies on wastewater is ensured.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more specifically, to a MOBR membrane bioreactor for wastewater treatment. Background Technology

[0002] MOBR membranes, by alternating MBR and MABR membrane fibers, can achieve both membrane effluent and efficient washing of the MBR membrane fiber surface through aeration of the MABR membrane fibers, thus achieving precise membrane cleaning, delaying membrane fouling, and increasing membrane flux.

[0003] Chinese Patent CN222631196U discloses a MOBR membrane bioreactor, belonging to the field of MOBR membrane technology. Key technical features include a shell, a cover on top of the shell, an adjustment mechanism inside the shell, and a membrane body inside the shell. The adjustment mechanism includes two limiting plates, an adjustment plate, and several pull rods. The rear side of the adjustment plate contacts the rear side of the inner wall of the shell, the rear side of the limiting plates is fixedly connected to the front side of the adjustment plate, the rear side of the pull rods is fixedly connected to the front side of the adjustment plate, a threaded column is rotatably connected to the top of the adjustment plate, and a fixing plate is fixedly connected to the rear side of the top of the shell.

[0004] In this patent, when the membrane is treating wastewater, impurities accumulate in the recessed areas of the membrane, which can lead to more severe membrane clogging and affect the wastewater treatment effect. Summary of the Invention

[0005] The main objective of this invention is to provide a MOBR membrane bioreactor for wastewater treatment, which cleans the membrane on both sides of a rectangular frame through an exhaust stack and isolates impurities through a horizontal sealing plate, thereby ensuring the membrane's treatment effect on wastewater.

[0006] To achieve the above objectives, the present invention provides a MOBR membrane bioreactor for wastewater treatment, comprising a treatment box, rectangular frames, a cleaning mechanism, an aeration mechanism, and a sludge discharge mechanism; the treatment box is convex in shape, with a first inlet pipe and a first outlet pipe diagonally arranged on the two outer walls at the top of the treatment box; multiple rectangular frames are arranged vertically inside the treatment box; each rectangular frame has membrane bodies installed at both ends; multiple cleaning mechanisms are set inside the corresponding rectangular frames and are used to clean the membrane bodies; each rectangular frame has a strip-shaped groove above it, and the cleaning mechanism includes a strip box slidably disposed within the corresponding strip-shaped groove, the strip box being able to move back and forth in the vertical direction; multiple connecting strip boxes are equidistantly arranged at the lower end of the strip box. The unit has an exhaust stack, each with multiple exhaust holes circumferentially arranged along its axis. Multiple sleeves are equidistantly arranged inside the rectangular frame, with the exhaust stack located inside the corresponding sleeve. Each sleeve has multiple air-sealing holes circumferentially arranged along its axis that cooperate with the exhaust holes. An air supply mechanism is located at the top of the treatment box and is used to input gas into multiple strip boxes. A sewage discharge mechanism is located at the lower interior of the treatment box and is used to seal and open gaps between adjacent rectangular frames and between the rectangular frames and the inner wall of the treatment box. The sealing mechanism includes multiple horizontal sealing plates equidistantly slidably arranged inside the treatment box. These horizontal sealing plates can move back and forth vertically and are sequentially arranged between the treatment box and the multiple rectangular frames. A sewage discharge pipe is located on the lower outer wall of the treatment box, and a one-way valve is installed on the sewage discharge pipe.

[0007] Preferably, each rectangular frame has a strip-shaped receiving cavity at its lower end, and the receiving cavity has multiple sliding holes for receiving the exhaust pipe. The lower end of the exhaust pipe extends into the strip-shaped receiving cavity through the corresponding sliding hole. Multiple V-shaped exhaust pipes connecting the strip-shaped receiving cavity are provided on both sides of the lower end of the rectangular frame along the length direction.

[0008] Preferably, each bar box is provided with an L-shaped connecting plate at the top, and two hydraulic rods are mirror-mounted on the top of the processing box. A connecting strip is provided between the two hydraulic rods, and the connecting strip is connected to multiple L-shaped connecting plates.

[0009] Preferably, the air supply mechanism includes a connecting pipe and a telescopic pipe; a telescopic pipe connecting the inside of the strip box is provided at the center of the top of each strip box, multiple telescopic pipes are connected to each other through the connecting pipe, the two ends of the connecting pipe are sealed and are fixed at the top of the processing box by fasteners, and an air inlet pipe is provided at the center of the connecting pipe.

[0010] Preferably, the sewage discharge mechanism further includes a rotating shaft and a drive motor; the rotating shaft is rotatably disposed inside the treatment box and located below multiple horizontal sealing plates, and multiple abutment blocks that cooperate with the horizontal sealing plates are equidistantly disposed on the rotating shaft; a drive motor for driving the rotating shaft to rotate is also disposed on the outer wall of the treatment box.

[0011] Preferably, a second water inlet pipe and a second drain pipe are also provided diagonally on the outer walls on both sides above the treatment box, and a solenoid valve is provided on both the first drain pipe and the second drain pipe.

[0012] Preferably, each horizontal sealing plate is also provided with a triangular guide section.

[0013] The advantages of this application compared to the prior art are:

[0014] 1. This application utilizes the combination of multiple rectangular frames to perform multiple filtration and adsorption of wastewater. Furthermore, through the cooperation of an exhaust pipe and a horizontal sealing plate, the opening of the exhaust holes on the exhaust pipe allows for impact on the membranes on both sides of the rectangular frames from inside, cleaning residual impurities from their surfaces. The movement of the horizontal sealing plate allows impurities to fall into the area below the treatment box and be discharged through the drain pipe, thus preventing impurity accumulation and membrane clogging, and improving the membrane's service life.

[0015] 2. This application provides a first inlet pipe and a second inlet pipe on both sides of the treatment box, thereby changing the flow direction of wastewater and ensuring that the membranes on the rectangular frames at both ends of the treatment box are fully utilized, avoiding uneven utilization of the membranes within the treatment box. This not only improves the treatment effect but also allows for secondary impact cleaning of the membranes using the flow of wastewater, thereby extending the service life of the membranes. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention, making other features, objects, and advantages of the invention more apparent. The illustrative embodiments of the invention illustrated in the drawings and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 yes Figure 2 A planar sectional view along the AA direction;

[0020] Figure 4 yes Figure 3 Enlarged view of a section at point B in the middle;

[0021] Figure 5 This is a partial perspective view of the present invention;

[0022] Figure 6 This is a partial exploded perspective view of the present invention.

[0023] The numbers in the above figure are:

[0024] 1-Treatment box; 11-First inlet pipe; 12-First drain pipe; 13-Sewage pipe; 131-Check valve; 14-Hydraulic rod; 15-Connecting strip; 16-Second inlet pipe; 17-Second drain pipe; 18-Solenoid valve;

[0025] 2-Rectangular frame; 21-Membrane body; 22-Strip groove; 23-Sleeve; 231-Air-closing hole; 24-Strip receiving cavity; 25-Sliding hole; 26-V-shaped air outlet pipe;

[0026] 3-Cleaning mechanism; 31-Bar box; 32-Exhaust pipe; 321-Exhaust port; 33-L-shaped connecting plate;

[0027] 4-Air delivery mechanism; 41-Connecting pipe; 42-Telescopic pipe; 43-Fixing component; 44-Air inlet pipe;

[0028] 5- Drainage mechanism; 51- Horizontal blocking plate; 511- Triangular guide; 52- Rotating shaft; 53- Contact block; 54- Drive motor. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0030] See Figures 1 to 6As shown, a MOBR membrane bioreactor for wastewater treatment includes a treatment box 1, rectangular frames 2, a cleaning mechanism 3, an aeration mechanism 4, and a sludge discharge mechanism 5. The treatment box 1 is convex in shape, with a first inlet pipe 11 and a first drain pipe 12 diagonally arranged on the upper two outer walls of the treatment box 1. Multiple rectangular frames 2 are vertically arranged inside the treatment box 1. Each rectangular frame 2 has a membrane body 21 at both ends. Multiple cleaning mechanisms 3 are arranged inside the corresponding rectangular frames 2 and used to clean the membrane body 21. Each rectangular frame 2 has a strip-shaped channel 22 above it. The cleaning mechanism 3 includes a strip-shaped box 31 slidably disposed within the corresponding strip-shaped channel 22, which can move back and forth vertically. Multiple exhaust pipes 32, communicating with the interior of the strip-shaped box 31, are equidistantly arranged at the lower end of each strip-shaped box 31. The exhaust pipe 32 has multiple exhaust holes 321 arranged circumferentially along the axial direction. Multiple sleeves 23 are arranged equidistantly inside the rectangular frame 2. The exhaust pipe 32 is located inside the corresponding sleeve 23. Each sleeve 23 has multiple air-closing holes 231 that cooperate with the exhaust holes 321 circumferentially along the axial direction. The gas supply mechanism 4 is located on the top of the treatment box 1 and is used to input gas into multiple strip boxes 31. The sewage discharge mechanism 5 is located inside the lower part of the treatment box 1 and is used to seal and open the gaps between adjacent rectangular frames 2 and between the rectangular frames 2 and the inner wall of the treatment box 1. The sealing mechanism includes multiple horizontal sealing plates 51 that are equidistantly slidably arranged inside the treatment box 1. The multiple horizontal sealing plates 51 can move back and forth in the vertical direction and are arranged sequentially between the treatment box 1 and the multiple rectangular frames 2. A sewage discharge pipe 13 is provided on the lower outer wall of the treatment box 1. A one-way valve 131 is provided on the sewage discharge pipe 13.

[0031] For an MBR membrane to produce effluent, it must maintain sufficient membrane flux, meaning the pores on the membrane must not become clogged. However, impurities in the wastewater can be adsorbed onto the membrane surface during filtration, leading to membrane fouling. MABR, on the other hand, directly supplies oxygen to the biofilm attached to the membrane surface through a breathable membrane material (such as a hollow fiber membrane), while wastewater flows outside the membrane. Microorganisms form a biofilm on the membrane surface, degrading organic pollutants in the water and achieving highly efficient nitrogen and phosphorus removal. Furthermore, the MABR membrane uses alternating MBR and MABR membrane fibers, which not only allows for effluent production but also enables efficient flushing of the MBR membrane fibers through aeration, achieving precise membrane cleaning, delaying membrane fouling, and increasing membrane flux. Meanwhile, the lower dissolved oxygen level has a smaller impact on the activated sludge. This invention delivers wastewater into the treatment box 1 through the first inlet pipe 11. Multiple horizontal sealing plates 51 are sequentially located between multiple rectangular frames 2 and the inner wall of the treatment box 1. The treatment box 1 has a convex shape, thus dividing the interior of the treatment box into upper and lower areas through the multiple horizontal sealing plates 51 and multiple rectangular frames 2. The upper area is used for wastewater treatment, and the lower area is used for collecting the treated impurities. Wastewater can be treated sequentially from the upper area through the membranes 21 on both sides of the multiple rectangular frames 2. At this time, the treated wastewater is discharged from the treatment box 1 through the first drain pipe 12, thus achieving wastewater treatment. During the wastewater treatment process, the air-sealing holes 231 on the sleeve 23 and the corresponding exhaust holes 321 on the exhaust pipe 32 are staggered, thereby sealing the exhaust holes 321 on the exhaust pipe 32, thus preventing impurities adsorbed on the membrane 21 from mixing with the treated wastewater and causing secondary pollution. After a period of treatment… Both the horizontal sealing plate 51 and the membrane 21 will have a lot of impurities remaining. At this time, the gas is delivered to multiple strip boxes 31 through the gas supply mechanism 4. Then, by adjusting the multiple strip boxes 31, the exhaust hole 321 on the exhaust pipe 32 is made coaxial with the corresponding air-closing hole 231 on the sleeve 23, so that the gas can impact the membrane 21 on both sides of the rectangular frame 2 through the exhaust hole 321 and the corresponding air-closing hole 231, thereby washing off the impurities adhering to the membrane 21. During this process, multiple horizontal sealing plates 51 move synchronously, thereby connecting the upper area and the lower area of ​​the treatment box 1. The impurities remaining on the membrane 21 and the impurities located between the rectangular frames 2 and between the rectangular frames 2 and the inner wall of the treatment box 1 can sink to the lower area of ​​the treatment box 1, thereby cleaning the impurities. After cleaning, the rectangular frame 2 and the horizontal sealing plate 51 are reset. Then, the staff cleans the impurities through the drain pipe 13 set on the outer wall of the treatment box 1, thereby improving the filtration effect and service life of the membrane 21.

[0032] See Figure 3 and Figure 4As shown, each rectangular frame 2 has a strip-shaped receiving cavity 24 at its lower end. The receiving cavity has multiple sliding holes 25 for receiving the exhaust pipe 32. The lower end of the exhaust pipe 32 extends into the strip-shaped receiving cavity 24 through the corresponding sliding hole 25. Multiple V-shaped exhaust pipes 26 connecting the strip-shaped receiving cavity 24 are provided on both sides of the lower end of the rectangular frame 2 along the length direction.

[0033] To better treat wastewater, a strip-shaped receiving cavity 24 is set at the lower end of the rectangular frame 2. The exhaust pipe 32 extends into the corresponding strip-shaped receiving cavity 24 through the sliding hole 25. At this time, the exhaust hole 321 in the lower area of ​​the exhaust pipe 32 is connected to the strip-shaped receiving cavity 24. At this time, gas is supplied through the air supply mechanism 4 and the strip box 31. The gas enters the strip-shaped receiving cavity 24 through the exhaust hole 321 in the lower area of ​​the exhaust pipe 32, and aerates the wastewater inside the treatment tank through the V-shaped air outlet pipes 26 on both sides of the rectangular frame 2, thereby improving the treatment effect of the membrane 21 on wastewater. When it is necessary to clean the membrane 21 and the impurities in the treatment tank, the exhaust pipe 32 is moved so that the lower end of the exhaust pipe 32 is flush with the upper plane inside the strip-shaped receiving cavity 24. At this time, the gas cannot enter the strip-shaped receiving cavity 24. The gas impacts the membrane 21 through the exhaust hole 321 and the air-closing hole 231 on the exhaust pipe 32 and the sleeve 23, thereby cleaning the membrane 21.

[0034] See Figure 2 , Figure 5 and Figure 6 As shown, each bar box 31 is provided with an L-shaped connecting plate 33 at its upper end, and two hydraulic rods 14 are mirrored on the top of the processing box 1. A connecting strip 15 is provided between the two hydraulic rods 14, and the connecting strip 15 is connected to multiple L-shaped connecting plates 33.

[0035] After the wastewater has been treated for a period of time, the two hydraulic rods 14 are driven synchronously to move multiple strip boxes 31 back and forth in the vertical direction. During this process, the exhaust holes 321 on the exhaust pipe 32 and the corresponding air-closing holes 231 on the sleeve 23 are staggered or coaxially arranged, so that the gas in the strip box 31 can be discharged through the exhaust holes 321 and impact the membrane 21 on both sides of the rectangular frame 2 from inside the rectangular frame 2, thereby cleaning the impurities remaining on the surface of the membrane 21 and improving the treatment effect of the membrane 21 on the wastewater.

[0036] See Figures 1 to 3 As shown, the air supply mechanism 4 includes a connecting pipe 41 and a telescopic pipe 42; each strip box 31 has a telescopic pipe 42 connecting the inside of the strip box 31 at the top center, and multiple telescopic pipes 42 are connected to each other through the connecting pipe 41. The two ends of the connecting pipe 41 are sealed and are set on the top of the processing box by a fixing member 43. An air inlet pipe 44 is provided at the center of the connecting pipe 41.

[0037] The air inlet pipe 44 is connected to an external air source, so that the gas can enter the interior of the connecting pipe 41 through the air inlet pipe 44, and then enter the interior of the corresponding strip box through the telescopic pipe 42. Furthermore, when the strip box 31 moves vertically, the telescopic pipe 42 can cooperate with the movement of the strip box 31 to ensure that the gas can impact the membrane 21.

[0038] See Figure 1 , Figures 4 to 6 As shown, the sewage discharge mechanism 5 also includes a rotating shaft 52 and a drive motor 54; the rotating shaft 52 is rotatably disposed inside the treatment box 1 and located below multiple horizontal sealing plates 51, and multiple abutment blocks 53 that cooperate with the horizontal sealing plates 51 are equidistantly disposed on the rotating shaft 52; the outer wall of the treatment box 1 is also provided with a drive motor 54 for driving the rotating shaft 52 to rotate.

[0039] The contact block 53 on the rotating shaft 52 can contact the corresponding horizontal sealing plate 51, so that multiple horizontal sealing plates 51 are on the same horizontal plane; multiple horizontal sealing plates 51 can cooperate with the corresponding rectangular frame 2, so that the treatment box 1 is divided into upper and lower layers. When it is necessary to clean impurities, the rotating shaft 52 is driven by the drive motor 54 to rotate, so that the contact block 53 is separated from the corresponding horizontal sealing plate 51. At this time, the impurities can settle to the lower layer area of ​​the treatment box 1. Then, the drive shaft rotates, so that the horizontal sealing plate 51 is reset, so that the upper and lower layers of the treatment box 1 are isolated, and the sludge is treated through the sewage pipe 13, thereby avoiding excessive impurities during wastewater treatment, which would cause the membrane 21 to be blocked.

[0040] See Figure 1 and Figure 3 As shown, a second water inlet pipe 16 and a second drain pipe 17 are also provided diagonally on the outer walls on both sides above the treatment box 1. Solenoid valves 18 are provided on both the first drain pipe 12 and the second drain pipe 17.

[0041] Because the wastewater flows in one direction for a long time, the membranes 21 installed in the treatment box 1 will be used to varying degrees, with the membranes 21 closer to the first drain pipe 12 being cleaner. In this case, the second inlet pipe 16 and the second drain pipe 17 are installed to change the flow direction of the wastewater, so that the membranes 21 closer to the first drain pipe 12 can be fully utilized. This not only improves the treatment effect, but also allows the flow of wastewater to perform a secondary impact cleaning on the membranes 21, thereby extending the service life of the membranes 21.

[0042] See Figure 4 As shown, each horizontal sealing plate 51 is also provided with a triangular guide part 511.

[0043] The triangular guide section 511 is provided to prevent impurities from accumulating on the horizontal sealing plate 51 and ensure that impurities can enter the area below the processing box 1.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A MOBR membrane bioreactor for wastewater treatment, characterized in that, It includes a treatment box, a rectangular frame, a cleaning mechanism, an air supply mechanism, and a sewage discharge mechanism; The treatment box is convex in shape, with a first inlet pipe and a first outlet pipe installed diagonally on the two outer walls at the top of the treatment box; there are multiple rectangular frames, which are vertically arranged inside the upper part of the treatment box; each rectangular frame has a membrane installed at both ends of its opening. There are multiple cleaning mechanisms, which are set inside the corresponding rectangular frames and used to clean the membrane. Each rectangular frame has a strip groove above it. The cleaning mechanism includes a strip box that is slidably set in the corresponding strip groove. The strip box can move back and forth in the vertical direction. Multiple exhaust pipes that connect to the inside of the strip box are equidistantly arranged at the lower end of the strip box. Each exhaust pipe has multiple exhaust holes circumferentially arranged along the axial direction. Multiple sleeves are equidistantly arranged inside the rectangular frame. The exhaust pipes are located inside the corresponding sleeves. Each sleeve has multiple air-sealing holes that cooperate with the exhaust holes circumferentially arranged along the axial direction. The gas delivery mechanism is located on top of the processing box and is used to input gas into multiple strip boxes; The sewage discharge mechanism is located inside the lower part of the treatment box and is used to seal and open the gaps between adjacent rectangular frames and between the rectangular frames and the inner wall of the treatment box; the sealing mechanism includes multiple horizontal sealing plates that are equidistantly slidably arranged inside the treatment box, and the multiple horizontal sealing plates can move back and forth in the vertical direction and are arranged sequentially between the treatment box and multiple rectangular frames; a sewage discharge pipe is provided on the lower outer wall of the treatment box, and a one-way valve is provided on the sewage discharge pipe.

2. The MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that, Each rectangular frame has a strip-shaped receiving cavity at its lower end, and the receiving cavity has multiple sliding holes for accommodating the exhaust pipe. The lower end of the exhaust pipe extends into the strip-shaped receiving cavity through the corresponding sliding hole. Multiple V-shaped exhaust pipes connecting the strip-shaped receiving cavity are provided on both sides of the lower end of the rectangular frame along the length direction.

3. The MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that, Each bar box is equipped with an L-shaped connecting plate at the top, and two hydraulic rods are mirrored on the top of the processing box. A connecting strip is installed between the two hydraulic rods, and the connecting strip is connected to multiple L-shaped connecting plates.

4. The MOBR membrane bioreactor for wastewater treatment according to claim 3, characterized in that, The air supply mechanism includes a connecting pipe and a telescopic pipe; Each bar box has a telescopic tube at the top center that connects to the inside of the bar box. Multiple telescopic tubes are connected to each other through a connecting tube. Both ends of the connecting tube are sealed and fixed to the top of the processing box by fasteners. An air inlet pipe is located at the center of the connecting tube.

5. The MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that, The sewage discharge mechanism also includes a rotating shaft and a drive motor; The rotating shaft is rotatably located inside the processing box and below multiple horizontal sealing plates. Multiple abutment blocks that cooperate with the horizontal sealing plates are equidistantly arranged on the rotating shaft. A drive motor for driving the rotating shaft to rotate is also provided on the outer wall of the processing box.

6. The MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that, The outer walls on both sides above the treatment box are also equipped with a second water inlet pipe and a second drain pipe at diagonal angles. Solenoid valves are installed on both the first drain pipe and the second drain pipe.

7. The MOBR membrane bioreactor for wastewater treatment according to claim 1, characterized in that, Each horizontal sealing plate is also equipped with a triangular guide section.

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