Vibrating MBR (Membrane Biological Reactor) coupling autotrophic advanced nitrogen removal treatment device
The vibration MBR system with an autotrophic denitrification treatment device addresses membrane blockage and high energy consumption by using a vibrating membrane assembly and biological denitrification, enhancing treatment efficiency and reducing costs.
Patent Information
- Application Number
- CN202420200283.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-26
AI Technical Summary
The existing MBR process for sewage treatment faces issues with membrane blockage due to sludge accumulation, leading to reduced membrane flux and increased energy consumption, primarily from scrubbing aeration blowers and lifting pumps, which also shorten the membrane's lifespan and increase production costs.
A vibration MBR coupled with an autotrophic deep denitrification system that uses a vibrating membrane assembly driven by a telescopic oil cylinder, combined with a sulfur autotrophic denitrification filler layer, to remove sludge through vibration and biological denitrification, eliminating the need for aeration and reducing energy consumption.
The system effectively prevents membrane blockage, maintains membrane flux, reduces energy consumption, and improves total nitrogen removal efficiency while lowering operational costs by utilizing biological denitrification and minimizing the use of carbon sources.
Smart Images
Figure CN222204937U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment, in particular to a vibration MBR coupled autotrophic deep denitrification treatment device. Background Art
[0002] MBR technology is a new type of sewage treatment process. This technology uses activated sludge to remove organic pollutants in sewage and uses membranes to separate water and activated sludge. It is mainly composed of a grid tank, an anaerobic tank, an anoxic tank, an aerobic tank and a membrane treatment equipment. The grid tank is used to intercept slag to prevent clogging of the lift pump and MBR membrane; the anaerobic bacteria in the anaerobic tank hydrolyze, acidify and methanize organic matter, and release the absorbed phosphorus (phosphorus is discharged in the form of sludge), which is conducive to subsequent treatment; the denitrifying bacteria in the anoxic tank use organic matter in sewage as a carbon source, and reduce the nitrate and nitrite that flow back into the tank to nitrogen gas for release; the aerobic tank uses aerobic microorganisms to decompose organic pollutants such as carbon and ammonia nitrogen; the membrane treatment equipment is equipped with a membrane assembly, which separates the sludge from the water.
[0003] When the membrane module is working, the sludge concentration and viscosity in the sewage may cause the membrane to be blocked, affecting the membrane flux, resulting in the attenuation of the membrane flux and affecting the sewage treatment efficiency. In order to improve the membrane flux, the existing method usually uses a scrubbing aeration blower to clean the sludge on the membrane module through aeration, and uses a lifting pump to increase the water inlet speed and pressure so that the trapped sludge can be taken away in time.
[0004] However, using a scrubbing aeration blower to purge and aerate the membrane components and using a lifting pump to pressurize and maintain the membrane flux will not only damage the membrane components, reduce their service life and affect normal production, but also consume a lot of electricity. Calculations of the energy consumption of each unit show that the energy consumption of the aeration blower and the lifting pump accounts for about 50% of the total energy consumption of the entire process, which is the largest power consumption part of the sewage treatment process, increasing the production cost of the enterprise.
[0005] The utility model aims to reduce the energy consumption of the MBR process, improve the total nitrogen index of effluent, reduce the use of carbon source and thus reduce the operating cost. Utility Model Content
[0006] In order to solve the above problems, the utility model provides a vibration MBR coupled autotrophic deep denitrification treatment device, including a shell 1, a vibration device 2, a membrane assembly 3 and a water production pump 4. The shell 1 is square, with an upper opening, and a sewage cavity 11 is formed inside. A sludge discharge port 12 is provided at the bottom of the shell 1. The vibration device 2 includes a slide rail 21, a slider 22 and a power mechanism. The slide rail 21 is vertically arranged on the inner wall of the shell 1, and the slider 22 is slidably arranged on the slide rail 21. The power mechanism is arranged on the shell 1, connected to the slider 22, and is used to drive the slider 22 to slide along the slide rail 21 in the up and down directions. The membrane assembly 3 is fixedly arranged on the slider 22, and a water outlet 31 is provided on the membrane assembly 3. The water inlet end 41 of the water production pump 4 is connected to the water outlet 31 through the suction pipe 42.
[0007] When the utility model is used, the sewage after the front-end process treatment is discharged into the sewage chamber 11, and anoxic bacteria are inoculated in the sewage chamber 11 to perform denitrification to remove a portion of the total nitrogen. The water production pump 4 and the power mechanism are turned on. Under the suction action of the water production pump 4, the filtered water in the sewage chamber 11 passes through the membrane on the membrane assembly 3 and is sucked out for post-treatment. The sludge blocked by the membrane on the membrane assembly 3 remains in the sewage pool and gathers in the sewage pool. The slider 22 is driven by the power mechanism to move up and down along the slide rail 21, driving the membrane assembly 3 to vibrate up and down. Under the vibration action and the flushing action of the sewage in the sewage chamber 11, the sludge attached to the membrane assembly 3 falls off. When the sludge in the sewage pool reaches a certain amount, the sludge is discharged from the sludge discharge port 12.
[0008] The utility model forms a sewage chamber 11 in the shell 1 by setting a shell 1 and a vibration device 2, and a slide rail 21 is fixedly set on the inner wall of the shell 1, a slider 22 is slidably set on the slide rail 21, and a membrane assembly 3 is fixedly set on the slider 22. The slider 22 can be driven by a power mechanism to move up and down along the slide rail 21, so as to drive the membrane assembly 3 to vibrate up and down. Under the action of vibration and the flushing action of sewage in the sewage chamber 11, the sludge attached to the membrane assembly 3 falls off, so as to prevent the membrane from being blocked, maintain the membrane flux, and ensure the efficiency of sewage treatment.
[0009] The membrane assembly 3 is arranged in the sewage chamber 11, and the sewage and sludge are temporarily stored in the sewage chamber 11, which can increase the number of bacteria in the sewage, increase the sludge concentration in the sewage pool, prolong the sludge retention time, and improve the biochemical treatment performance under low temperature and low influent water concentration conditions. In addition, there is no need for aeration in the sewage pool, and the flux of the MBR is maintained and pollution is reduced through reciprocating vibration, thereby reducing energy consumption.
[0010] Preferably, it also includes a shell 5, which is square and sleeved on the outside of the shell 1. A drain port 51 is provided at the bottom of the shell 5. The shell 1 is fixedly connected to the shell 5 and a distance is maintained between the shell 5 to form a processing chamber 52. The sludge discharge port 12 extends through the shell 5 to the bottom of the shell 5. A sulfur autotrophic denitrification filler layer 53 and a supporting layer 54 are provided in the processing chamber 52. The supporting layer 54 is located below the sulfur autotrophic denitrification filler layer 53, and the supporting layer 54 is limestone or dolomite particles. The water outlet 44 of the water production pump 4 is connected to the processing chamber 52 through the drain pipe 43.
[0011] By setting the shell 5, the shell 1 is fixedly set inside the shell 5, and a processing chamber 52 is formed between the shell 1 and the shell 5. A sulfur autotrophic denitrification filler layer 53 is set inside the processing chamber 52, and limestone or dolomite particles are set as a supporting layer 54. The water outlet end 44 of the water production pump 4 is connected with the processing chamber 52 through the drain pipe 43, and the filtered water after membrane filtration is discharged into the processing chamber 52. The sulfur autotrophic denitrification filler uses sodium sulfide, sodium thiosulfate and elemental sulfur as reduced sulfur sources as electron donors for the denitrification action of sulfur autotrophic denitrifying bacteria, and at the same time, limestone or dolomite is used to provide part of the carbon source and appropriate alkalinity for the denitrifying bacteria, so that the remaining nitrate nitrogen in the filtered water is converted into nitrogen gas, and the reduced sulfur is converted into sulfate, thereby reducing the use of carbon sources and improving the effluent water quality of total nitrogen.
[0012] Preferably, the power mechanism is a telescopic oil cylinder 23, a cylinder body 231 of the telescopic oil cylinder 23 is fixedly connected to the upper part of the housing 1, and a telescopic rod 232 of the telescopic oil cylinder 23 is fixedly connected to the slider 22. The power mechanism is set to be a telescopic oil cylinder 23, and the membrane assembly 3 can be driven to move downward along the slider 22 by extending the telescopic rod 232 on the telescopic oil cylinder 23, and the membrane assembly 3 can be driven to move upward along the slider 22 by contracting the telescopic rod 232, so as to drive the membrane assembly 3 to vibrate up and down, thereby saving energy consumption.
[0013] Preferably, the water production pump 4 is fixedly arranged on the housing 5, and the water suction pipe 42 is a hose. By fixing the water production pump 4 on the housing 5, the length of the water suction pipe 42 and the drain pipe 43 can be reduced, and the water production pump 4 can be fixed to prevent collision damage. Setting the water suction pipe 42 as a hose can prevent the water suction pipe 42 from affecting the vibration of the membrane assembly 3.
[0014] Preferably, a filter screen 55 is further included, which is fixedly arranged in the processing chamber 52 and covered at the drain outlet 51. The filter screen 55 is arranged at the drain outlet 51 to prevent the support layer 54 and the composite filler layer in the processing chamber 52 from leaking.
[0015] Preferably, a discharge valve 13 is provided on the sludge discharge port 12, and a drain valve 57 is provided on the drain port 51. The discharge valve 13 is provided on the sludge discharge port 12 to discharge the sludge in the sewage chamber 11 at a regular time. The drain valve 57 is provided on the drain port 51 to discharge the clean water in the treatment chamber 52 at a regular time.
[0016] Preferably, a plurality of supporting legs 56 are provided at the bottom of the housing 5, and the plurality of supporting legs 56 are vertically arranged and evenly distributed. By providing a plurality of supporting legs 56 at the bottom of the housing 5, the device can be supported so that the device remains stable when the vibration device 2 drives the membrane assembly 3 to vibrate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 . Schematic diagram of the external structure of the vibration MBR coupled autotrophic deep denitrification treatment device;
[0018] Figure 2 . Schematic diagram of the top view of the structure of the vibration MBR coupled autotrophic deep denitrification treatment device;
[0019] Figure 3 . Figure 2 Schematic diagram of the AA section structure;
[0020] Figure 4 .Schematic diagram of the vibration device structure.
[0021] In the figure, 1. shell, 11. sewage chamber, 12. sludge discharge port, 13. discharge valve, 2. vibration device, 21. slide rail, 22. slider, 23. telescopic cylinder, 231. cylinder body, 232. telescopic rod, 3. membrane assembly, 31. water outlet, 4. water production pump, 41. water inlet, 42. suction pipe, 43. drain pipe, 44. water outlet, 5. shell, 51. drain port, 52. treatment chamber, 53. sulfur autotrophic denitrification filler layer, 54. supporting layer, 55. filter screen, 56. support leg, 57. drain valve. DETAILED DESCRIPTION
[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.
[0023] like Figure 1 and Figure 3 As shown, the vibration MBR coupled autotrophic deep denitrification treatment device includes an outer shell 5, a shell 1, a vibration device 2, a membrane assembly 3 and a water production pump 4.
[0024] The housing 5 is square and has an upper opening. A drain port 51 is provided at the bottom of the side wall of the housing 5. Four support legs 56 are provided at the bottom of the housing 5. The four support legs 56 are provided at positions near four angles of the bottom of the housing 5. The support legs 56 are provided at the bottom of the housing 5 to support the device so that the device remains stable when the vibration device 2 drives the membrane assembly 3 to vibrate.
[0025] The drain port 51 is provided with a drain valve 57. The drain port 51 is provided with the drain valve 57 so as to discharge the clean water in the processing chamber 52 at a regular time.
[0026] The filter screen 55 is fixedly arranged in the processing chamber 52 and is covered at the drain outlet 51. The filter screen 55 is arranged at the drain outlet 51 to prevent the material of the supporting layer 54 and the composite filler layer in the processing chamber 52 from leaking.
[0027] The shell 1 is square and fixedly arranged inside the outer shell 5. A distance is maintained between the shell 1 and the outer shell 5 to form a processing chamber 52. The upper part of the shell 1 is open, and a sewage chamber 11 is formed inside.
[0028] A sludge discharge port 12 is provided at the bottom of the shell 1 , and the sludge discharge port 12 extends through the outer shell 5 to the bottom of the outer shell 5 . A discharge valve 13 is provided on the sludge discharge port 12 , and the sludge in the sewage chamber 11 can be discharged at a regular time.
[0029] A sulfur autotrophic denitrification filler layer 53 and a support layer 54 are arranged in the processing chamber 52. The support layer 54 is located below the sulfur autotrophic denitrification filler layer 53, and the support layer 54 is limestone or dolomite particles.
[0030] Sulfur autotrophic denitrification filler does not require additional energy input during the treatment process, greatly reducing the energy consumption of sewage treatment.
[0031] The filtered water after being filtered by the membrane assembly 3 is discharged into the treatment chamber 52, a sulfur autotrophic denitrification filler layer 53 is arranged inside the treatment chamber 52, and limestone or dolomite particles are arranged as a supporting layer 54. The sulfur autotrophic denitrification filler uses reduced sulfur sources such as sodium sulfide, sodium thiosulfate and elemental sulfur as electron donors for the denitrification action of sulfur autotrophic denitrifying bacteria, and at the same time, limestone or dolomite provides part of the carbon source and appropriate alkalinity for the denitrifying bacteria, so that the remaining nitrate nitrogen in the filtered water is converted into nitrogen gas, and the reduced sulfur is converted into sulfate, thereby reducing the use of carbon sources, reducing operating costs, and improving the effluent water quality of total nitrogen.
[0032] like Figure 4 As shown, the vibration device 2 includes a slide rail 21, a slider 22 and a power mechanism, wherein the slide rail 21 is vertically arranged on the inner side wall of the housing 1, and the slider 22 is slidably arranged on the slide rail 21. The power mechanism is arranged on the housing 1, connected to the slider 22, and is used to drive the slider 22 to slide along the slide rail 21 in the up and down directions.
[0033] The membrane assembly 3 is fixedly disposed on the slider 22 . A water outlet 31 is disposed on the membrane assembly 3 . The membrane assembly 3 is a commonly used device in the field of sewage treatment. As a prior art, it will not be described in detail here.
[0034] The water production pump 4 is fixedly arranged on the housing 5, the water inlet end 41 of the water production pump 4 is connected to the water outlet 31 through the water suction pipe 42, and the water outlet end 44 of the water production pump 4 is connected to the processing chamber 52 through the drainage pipe 43. Figure 2 .
[0035] The water production pump 4 is fixedly arranged on the housing 5, so that the length of the water suction pipe 42 and the discharge pipe 43 can be reduced, and the water production pump 4 can be fixed to prevent collision damage.
[0036] The water suction pipe 42 is a hose. Setting the water suction pipe 42 as a hose can prevent the water suction pipe 42 from affecting the vibration of the membrane assembly 3.
[0037] The power mechanism is a telescopic oil cylinder 23, a cylinder body 231 of the telescopic oil cylinder 23 is fixedly connected to the upper part of the housing 1, and a telescopic rod 232 of the telescopic oil cylinder 23 is fixedly connected to the slider 22. The power mechanism is set as the telescopic oil cylinder 23, and the membrane assembly 3 can be driven to move downward along the slider 22 by extending the telescopic rod 232 on the telescopic oil cylinder 23, and the membrane assembly 3 can be driven to move upward along the slider 22 by contracting the telescopic rod 232, so as to drive the membrane assembly 3 to vibrate up and down, thereby saving energy consumption.
[0038] A shell 1 and a vibration device 2 are provided, a slide rail 21 is fixedly provided on the inner wall of the shell 1, a slider 22 is slidably provided on the slide rail 21, and a membrane assembly 3 is fixedly provided on the slider 22. The slider 22 can be driven by a power mechanism to move up and down along the slide rail 21, thereby driving the membrane assembly 3 to vibrate up and down. Under the action of vibration and the flushing action of the sewage in the sewage chamber 11, the sludge attached to the membrane assembly 3 falls off, thereby preventing the membrane from being blocked, maintaining the membrane flux, and ensuring the efficiency of sewage treatment.
[0039] The membrane assembly 3 is arranged in the sewage chamber 11, and the sewage and sludge are temporarily stored in the sewage chamber 11, which can increase the number of bacteria in the sewage, increase the sludge concentration in the sewage pool, and prolong the sludge retention time, so as to improve the biochemical treatment performance under low temperature and low influent concentration conditions. In addition, there is no need for aeration in the sewage pool, and the microorganisms in the sewage pool can perform nitrification and denitrification, which can remove a part of the total nitrogen and improve the removal rate of the pollutants.
[0040] When the utility model is used, the sewage after the front-end process is discharged into the sewage chamber 11, and anoxic bacteria are inoculated in the sewage chamber 11 to perform denitrification and remove a part of the total nitrogen. The water production pump 4 and the telescopic cylinder 23 are turned on. Under the suction action of the water production pump 4, the filtered water in the sewage chamber 11 passes through the membrane on the membrane assembly 3 and is sucked out and then discharged into the treatment chamber 52. The sludge blocked by the membrane on the membrane assembly 3 remains in the sewage pool and gathers in the sewage pool. The sliding block 22 is driven up and down along the slide rail 21 by the telescopic cylinder 23, driving the membrane assembly 3 to vibrate up and down. Under the vibration and the flushing action of the sewage in the sewage chamber 11, the sludge attached to the membrane assembly 3 falls off. When the sludge in the sewage pool reaches a certain amount, the sludge is discharged from the sludge discharge port 12. Under the action of denitrifying bacteria, the nitrate nitrogen remaining in the filtered water entering the treatment chamber 52 is converted into nitrogen gas, and it is discharged from the drain port 51 after reaching the discharge index.
[0041] The utility model forms a sewage chamber 11 in the shell 1 by setting a shell 1 and a vibration device 2, and a slide rail 21 is fixedly set on the inner wall of the shell 1, a slider 22 is slidably set on the slide rail 21, and a membrane assembly 3 is fixedly set on the slider 22. The slider 22 can be driven by a power mechanism to move up and down along the slide rail 21, so as to drive the membrane assembly 3 to vibrate up and down. Under the action of vibration and the flushing action of sewage in the sewage chamber 11, the sludge attached to the membrane assembly 3 falls off, so as to prevent the membrane from being blocked, maintain the membrane flux, and ensure the efficiency of sewage treatment.
[0042] The membrane assembly 3 is arranged in the sewage chamber 11, and the sewage and sludge are temporarily stored in the sewage chamber 11, which can increase the number of bacteria in the sewage, increase the sludge concentration in the sewage pool, prolong the sludge retention time, and improve the biochemical treatment performance under low temperature and low influent water concentration conditions. In addition, there is no need for aeration in the sewage pool, and the membrane flux of the membrane assembly is maintained through reciprocating vibration, which reduces pollution and thus reduces energy consumption.
[0043] A shell 5 is provided, and a treatment chamber 52 is formed between the shell 1 and the shell 5. A sulfur autotrophic denitrification filler layer 53 is provided inside the treatment chamber 52. Limestone or dolomite particles are provided as a supporting layer 54. The water outlet 44 of the water production pump 4 is connected to the treatment chamber 52 through a drain pipe 43, and the filtered water after membrane filtration is discharged into the treatment chamber 52. The sulfur autotrophic denitrification filler uses a reduced sulfur source such as sodium sulfide, sodium thiosulfate and elemental sulfur as an electron donor for the denitrification action of the sulfur autotrophic denitrifying bacteria. At the same time, limestone or dolomite is used to provide a part of the carbon source and appropriate alkalinity for the denitrifying bacteria, and the remaining nitrate nitrogen in the filtered water is converted into nitrogen gas, and the reduced sulfur is converted into sulfate, thereby reducing the use of carbon sources, reducing operating costs, and improving the outlet water quality of total nitrogen.
[0044] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.
Claims
1. A vibration MBR coupled autotrophic deep denitrification treatment device, characterized in that: It comprises a housing (1), a vibration device (2), a membrane assembly (3) and a water production pump (4). The shell (1) is square in shape, with an opening at the top and a sewage cavity (11) formed inside. A sludge discharge port (12) is provided at the bottom of the shell (1); The vibration device (2) comprises a slide rail (21), a slider (22) and a power mechanism. The slide rail (21) is vertically arranged on the inner wall of the housing (1); The slide block (22) is slidably disposed on the slide rail (21); The power mechanism is arranged on the housing (1), connected to the slider (22), and used to drive the slider (22) to slide along the slide rail (21) in an up-down direction; The membrane assembly (3) is fixedly mounted on the slider (22), and a water outlet (31) is provided on the membrane assembly (3); The water inlet end (41) of the water production pump (4) is connected to the water outlet (31) via a water suction pipe (42).
2. A vibration MBR coupled autotrophic deep denitrification treatment device according to claim 1, characterized in that: Also includes a housing (5), The outer shell (5) is square and is sleeved outside the housing (1). A drainage port (51) is provided at the bottom of the side wall of the outer shell (5). The shell (1) is fixedly connected to the outer shell (5), and a distance is maintained between the shell (1) and the outer shell (5), so as to form a processing chamber (52); The sludge discharge port (12) passes through the outer shell (5) and extends to below the outer shell (5); The treatment chamber (52) is provided with a sulfur autotrophic denitrification filler layer (53) and a supporting layer (54). The supporting layer (54) is located below the sulfur autotrophic denitrification filler layer (53), and the supporting layer (54) is limestone or dolomite particles; The water outlet end (44) of the water production pump (4) is in communication with the processing chamber (52) via a drainage pipe (43).
3. A vibration MBR coupled autotrophic deep denitrification treatment device according to claim 2, characterized in that: The power mechanism is a telescopic oil cylinder (23). The cylinder body (231) of the telescopic oil cylinder (23) is fixedly connected to the upper part of the housing (1), and the telescopic rod (232) of the telescopic oil cylinder (23) is fixedly connected to the sliding block (22).
4. A vibration MBR coupled autotrophic deep denitrification treatment device according to claim 3, characterized in that: The water production pump (4) is fixedly mounted on the housing (5). The water suction pipe (42) is a hose.
5. A vibration MBR coupled autotrophic deep denitrification treatment device according to claim 4, characterized in that: Also includes a filter (55), The filter screen (55) is fixedly arranged in the processing chamber (52), and the cover is arranged at the drainage outlet (51).
6. A vibration MBR coupled autotrophic deep denitrification treatment device according to claim 5, characterized in that: The sludge discharge port (12) is provided with a discharge valve (13); The drain port (51) is provided with a drain valve (57).
7. A vibration MBR coupled autotrophic deep denitrification treatment device according to any one of claims 2 to 6, characterized in that: The bottom of the housing (5) is provided with a plurality of supporting legs (56). The plurality of support legs (56) are arranged vertically and evenly distributed.