CN219701588U - Membrane bioreactor - Google Patents
Membrane bioreactor Download PDFInfo
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- CN219701588U CN219701588U CN202222853160.3U CN202222853160U CN219701588U CN 219701588 U CN219701588 U CN 219701588U CN 202222853160 U CN202222853160 U CN 202222853160U CN 219701588 U CN219701588 U CN 219701588U
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- membrane
- membrane bioreactor
- bioreactor
- stuffing box
- shaking
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Abstract
本实用新型提供了一种膜生物反应器，在膜组件之间设置填料，通过抖动组件抖动膜组件，使膜组件与填料和水体进行摩擦，对膜组件进行擦洗，清除膜组件表面生物膜和污垢沉积；并通过填料箱将填料限制在膜组件的周围，提高对膜组件进行擦洗的频率与强度。实现了高效的物理清洗，具有较好的膜污染控制效果，且相比于传统的过量曝气等物理清洗方法具有更低的能耗，有利于膜生物反应器技术的推广应用。
The utility model provides a membrane bioreactor, in which fillers are arranged between membrane components. The membrane components are shaken by shaking the components to cause friction between the membrane components and the fillers and the water body. The membrane components are scrubbed to remove biofilm and water on the surface of the membrane components. dirt deposition; and the stuffing box is used to limit the filler around the membrane module, increasing the frequency and intensity of scrubbing the membrane module. It achieves efficient physical cleaning, has better membrane pollution control effect, and has lower energy consumption than traditional physical cleaning methods such as excessive aeration, which is conducive to the promotion and application of membrane bioreactor technology.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a membrane bioreactor.
Background
The membrane bioreactor of the related technology has the defects of poor membrane pollution control technical effect, high physical cleaning energy consumption and the like, and limits the further popularization and application of the membrane bioreactor technology.
Disclosure of Invention
In view of the above, an object of the present utility model is to provide a membrane bioreactor.
Based on the above object, the present utility model provides a membrane bioreactor comprising:
at least one membrane module, packing, stuffing box and shaking module; the membrane components are fixed in the stuffing box, the stuffing is arranged in the stuffing box and is positioned between the membrane components, and the shaking component is connected with the membrane components; the stuffing box is provided with a screen structure, and the mesh aperture of the screen structure is smaller than the diameter of the inscribed sphere of the stuffing.
From the above, the membrane bioreactor provided by the utility model has the advantages that the filler is arranged between the membrane components, the membrane components are dithered through the dithering component, so that the membrane components are rubbed with the filler and the water body, the membrane components are scrubbed, and the biological membrane and dirt deposition on the surface of the membrane components are removed; and the stuffing box is used for limiting the stuffing to the periphery of the membrane assembly, so that the frequency and the strength for scrubbing the membrane assembly are improved. Realizes high-efficiency physical cleaning, has better membrane pollution control effect, has lower energy consumption compared with the traditional physical cleaning methods such as excessive aeration and the like, and is favorable for popularization and application of membrane bioreactor technology.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing the front view of a membrane bioreactor according to an embodiment of the present utility model.
FIG. 2 is a schematic cross-sectional view of a membrane bioreactor according to an embodiment of the present utility model.
Wherein reference numerals include: the membrane assembly 1, the packing 2, the packing box 3, the screen structure 4, the truss 5, the motor 6, the transmission rod 7, the box body 8, the sludge discharge pipe 9, the air supply pipe 10, the aerator 11 and the water collecting pipe 12.
Detailed Description
The present utility model will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present utility model should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure pertains. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The membrane bioreactor (membrane biological reactor, MBR) is a high-efficiency sewage treatment technology combining a membrane separation unit and a biological treatment unit, and uses a membrane component to replace a secondary sedimentation tank for sludge-water separation, so that high active sludge concentration is maintained in the bioreactor, the organic load of biological treatment is improved, the occupied area of sewage treatment facilities is reduced, and the sludge amount is reduced by maintaining low sludge load. Compared with the traditional biochemical water treatment technology, the membrane bioreactor has the following advantages: the treatment efficiency is high, and the quality of the effluent water is good; the equipment is compact and occupies small area; easy to realize automatic control and convenient to operate and manage.
The membrane pollution refers to the phenomenon that in the membrane filtration process, microparticles, colloid particles or solute macromolecules in sewage and the membrane have physical, chemical, biochemical or mechanical actions, are adsorbed and deposited on the membrane surface or in the membrane hole and are accumulated on the membrane water interface, so that the membrane pore diameter is reduced or blocked, and the permeation flow and separation characteristics of the membrane are greatly reduced. Membrane fouling not only shortens the useful life of the membrane, but also directly results in increased suction head of the pump and aeration for membrane surface cleaning.
With the advent of submerged MBR and steadily decreasing price of membrane materials, MBR has become a very attractive and competitive choice in the field of sewage treatment and reuse, and gradually entered the application stage of large-scale commercialization. At present, most of urban sewage treatment adopts immersed MBR, but membrane flux attenuation caused by membrane pollution is fast, and cleaning energy consumption of the membrane pollution is high, so that the adverse factors prevent further popularization and application of the membrane bioreactor technology.
At present, the control of membrane pollution is carried out by physical means and chemical cleaning methods. Perforated pipe aeration is the most important physical cleaning means for MBR. The biofilm deposited on the membrane surface is rinsed off by excess aeration to extend the time interval of chemical cleaning. However, the aeration flushing effect of the perforated pipe is difficult to meet the requirement in actual operation, the designed gas-water ratio is as high as more than 20, and the designed gas-water ratio accounts for 80% -90% of the total energy consumption of the whole system, and compared with the gas-water ratio of 6-8 of the traditional activated sludge process, the aeration flushing effect is greatly different, which is the main reason for higher MBR energy consumption, high operation cost and frequent cleaning and replacement of the membrane module. Meanwhile, excessive aeration can cause too high dissolved oxygen in the system, so that the denitrification capability of a microbial community in the MBR system is reduced, and the nitrate nitrogen content in the effluent of the membrane bioreactor is higher.
In recent years, some researches have been made to reduce pollution of membrane filaments by adding suspended filler or installing filiform filler into a membrane bioreactor, and to reduce sludge in contact with the membrane filaments by using a scouring action of the filler and a filtering action of the filler. However, in these technologies, aeration is commonly performed by using perforated pipes with larger apertures, so that the scouring strength is difficult to control, and the aim of effectively controlling membrane pollution is not substantially achieved.
The utility model provides a membrane bioreactor based on the defects of poor membrane pollution control technical effect, high physical cleaning energy consumption and the like of the membrane bioreactor in the related technology.
According to the membrane bioreactor provided by the utility model, the filler is arranged between the membrane components, the membrane components are dithered through the dithering component, so that the membrane components are rubbed with the filler and the water body, the membrane components are scrubbed, and the biological membrane and dirt deposition on the surface of the membrane components are removed; and the stuffing box is used for limiting the stuffing to the periphery of the membrane assembly, so that the frequency and the strength for scrubbing the membrane assembly are improved. Realizes high-efficiency physical cleaning, has better membrane pollution control effect, has lower energy consumption compared with the traditional physical cleaning methods such as excessive aeration and the like, and is favorable for popularization and application of membrane bioreactor technology.
Fig. 1 shows a schematic front view of a membrane bioreactor according to an embodiment of the present utility model. Fig. 2 shows a schematic cross-sectional structure of a membrane bioreactor according to an embodiment of the present utility model.
As shown in fig. 1, an embodiment of the present utility model provides a membrane bioreactor, which may comprise at least one membrane module 1, a packing 2, a stuffing box 3 and a shaking module. The membrane module 1 may include a hollow fiber membrane and a fixing plate by which the hollow fiber membrane is fixed.
The membrane modules 1 are vertically installed and fixed in the stuffing box 3, a plurality of membrane modules 1 are arranged in parallel, stuffing 2 is arranged in the stuffing box 3, and the stuffing 2 is located between the membrane modules 1. The shaking component is connected with the membrane component 1 and can drive the membrane component 1 to shake.
Referring to fig. 1, the lower part of the membrane module 1 is fixed to the stuffing box 3, the upper part is connected to the shaking module, and the membrane module 1 has a certain elasticity, so that the membrane module 1 can shake under the driving of the shaking module.
In this embodiment, the shaking direction may be a vertical direction, a horizontal direction, or any other direction, which is not limited to this embodiment of the present utility model. The jitter parameters of the jitter component when running may be the following parameters: the shaking time is 5-10 minutes, the shaking frequency is 5-10 times/second, the shaking amplitude is 5% -10% of the length of the hollow fiber membrane, and the hollow fiber membrane is prevented from being damaged by plastic stretching in the shaking process.
In this way, the membrane assembly 1 is driven to shake through the shaking assembly, so that the membrane assembly 1 rubs with the filler 2 and the water body in the shaking process, the membrane assembly 1 is scrubbed, the biomembrane and dirt deposition on the surface of the membrane assembly 1 are removed, and the membrane pollution of the membrane bioreactor is controlled.
The stuffing box 3 is a hollow box body and is provided with a screen structure 4, and the mesh aperture of the screen structure 4 is smaller than the diameter of the inscribed sphere of the stuffing 2.
In this embodiment, the screen structure 4 may be located at the top and side walls of the stuffing box 3 to facilitate the entry of water into the stuffing box 3.
Therefore, the packing 2 can be limited around the membrane assembly 1 while the water body is ensured to enter the packing box 3 through the screen structure 4, so that the frequency and the strength of scrubbing the membrane assembly 1 by the packing 2 when the membrane assembly 1 shakes are improved, and efficient physical cleaning is realized.
As an alternative embodiment, the material of the filler 2 may be polyurethane, and the shape may be a cube having a side length of 1.5cm or more and 2cm or less.
In this embodiment, the polyurethane is a soft material, which can prevent the membrane module 1 from being damaged when the membrane module 1 is scrubbed; the filler 2 has such a shape that it can have a good scrubbing effect, prevent the undersize from coming into contact with the membrane module 1 and also prevent the undersize from causing insufficient scrubbing force.
As an alternative embodiment, the filler 2 may be loaded with a microbial agent to enhance the membrane pollution control effect or the water treatment effect of the membrane bioreactor.
For example, bacillus subtilis with high-efficiency degradation of microbial quorum sensing signal molecules can be loaded on the filler 2 to slow down the formation of a biological film on the surface of the membrane component 1, so that the membrane pollution of the membrane bioreactor is relieved; pan Longni alkaline lake bacillus capable of performing synchronous nitrification and denitrification in an aerobic environment can be loaded on the filler 2, so that the nitrate concentration of the effluent of the membrane bioreactor is reduced, and the quality of the effluent is improved.
As an alternative embodiment, the distance between the two membrane modules 1 is greater than twice the diameter of the outer sphere of the packing 2.
In this way, the packing 2 can be prevented from being stuck between the membrane modules 1, affecting the scrubbing effect.
As an alternative embodiment, the dithering assembly may include a truss 5, a motor 6, and a transmission rod 7. The truss 5 is connected with one end of the membrane assembly 1 and is connected with the output end of the motor 6 through a transmission rod 7.
In this way, the motor 6 drives the transmission rod 7 to rotate, and then drives the truss 5 to move, so as to drive the membrane assembly 1 to shake.
As an alternative embodiment, the total volume of the packing 2 may be equal to or greater than 50% of the actual volume of the stuffing box 3 and equal to or less than 70% of the actual volume of the stuffing box 3. The actual volume of the stuffing box 3 is the volume after the volume occupied by the components in the stuffing box 3 is removed, i.e. the maximum volume of water that can be accommodated in the stuffing box 3.
In this way, the scouring effect of the packing 2 on the membrane module 1 is ensured, and the packing 2 is prevented from being difficult to move due to the excessive volume occupied by the packing 2, and the scouring effect is prevented from being affected.
As an alternative embodiment, the membrane bioreactor may further comprise a tank 8 and a sludge discharge pipe 9. The stuffing box 3 is fixed inside the box body 8, and the mud pipe 9 is fixed on the outer wall of the box body 8.
In this embodiment, the sludge discharge pipe 9 is fixed to the bottom of the outer wall, so that the surplus sludge in the tank 8 is discharged.
In this way, the stuffing box 3 is accommodated through the box body 8, and surplus sludge in the box body 8 is discharged through the sludge discharge pipe 9.
In particular, the shaking assembly can be arranged at the top of the inside of the box body 8, so that sewage is prevented from contacting the motor 6 to influence the normal operation of the motor 6.
As an alternative embodiment, the membrane bioreactor may further comprise a gas supply pipe 10 and at least one aerator 11.
The air supply pipe 10 is arranged at the bottom of the stuffing box 3, the air inlet of the air supply pipe 10 extends out of the box body 8, and the side wall of the air supply pipe 10 is provided with at least one air outlet.
In this embodiment, the gas inlet of the gas supply pipe 10 may pass through the side wall of the stuffing box 3 and the side wall of the box body 8 and protrude out of the box body 8 so that the gas inlet is connected to the gas supply outside the membrane bioreactor. The gas supply pipe 10 may be a mesh pipe formed by combining a plurality of pipes and covers the lower portions of all the membrane modules 1.
The air inlet of the aerator 11 is connected with the air outlet of the air supply pipe 10, and the air outlet of the aerator 11 faces the membrane component 1.
In the present embodiment, the aerator 11 may be a micro-pore aerator 11. Thus, compared with the aeration using perforated pipes in the related art, the adoption of the microporous aerator 11 greatly reduces the aeration rate of the reactor and improves the oxygen mass transfer rate.
As an alternative embodiment, the membrane bioreactor may further comprise a water collection pipe 12. The water collecting pipe 12 is connected with one end of the membrane component 1 far away from the shaking component, and the other end is connected with a suction pump outside the membrane bioreactor.
Thus, the sewage treated by the membrane module 1 can be discharged through the water collecting pipe 12 and the suction pump.
As an alternative embodiment, the membrane bioreactor may further comprise a pressure sensor. The pressure sensor is provided on the water collection pipe 12 and is electrically connected to the shaking device.
In the sewage treatment process, as the membrane pollution of the membrane module 1 is aggravated, the pipeline pressure when the sewage treated by the membrane module is discharged through the water collecting pipe 12 and the suction pump is gradually increased, that is, when the pipeline pressure is detected to be increased, the membrane pollution of the membrane module 1 can be determined to be aggravated.
In the present embodiment, the pipe pressure of the water collecting pipe 12 is measured by a pressure sensor, and when the pipe pressure exceeds a preset pressure threshold value, the shaking device is activated.
Thus, when the membrane pollution level of the membrane module 1 reaches a preset threshold value, the shaking device can be automatically started to clean the membrane module 1 and control the membrane pollution.
As an alternative embodiment, the membrane bioreactor may further comprise a timing assembly. The timing assembly is electrically connected with the dithering apparatus.
In this embodiment, the dithering apparatus is turned on by the timing assembly at predetermined time intervals, for example, the time intervals may be 1-3 hours.
In this way, by timing the opening of the shaking means it is ensured that the membrane module 1 does not have heavy membrane contamination due to long periods of non-cleaning.
The method for sewage treatment by the membrane bioreactor provided by the embodiment of the utility model is briefly described as follows:
(1) The sewage is introduced into the membrane bioreactor, so that the stuffing box 3, the membrane component 1 and the stuffing 2 arranged in the stuffing box are completely immersed in the sewage, and the specific technical requirement can be that the depth of the sewage liquid level submerging the top screen structure 4 of the stuffing box 3 is more than or equal to 10cm.
(2) The shaking device is started according to the preset starting condition of the shaking device through the pressure sensor or the timing assembly, so that the membrane assembly 1, the water body and the filler 2 relatively move, the surface of the membrane assembly 1 is rubbed, and meanwhile stirring and mixing of muddy water are promoted, so that the activated sludge and the filler 2 are kept in a suspended state.
(3) In the sewage treatment process, the microporous aerator 11 is started, and the microbial inoculum loaded on the filler 2 and the biomembrane attached to the filler 2 are used for decomposing pollutants in the sewage together with the suspended sludge.
(4) The sewage treated by the membrane component 1 is discharged out of the membrane bioreactor by a water collecting pipe 12 and a suction pump, and the residual sludge is discharged out of the membrane bioreactor by a sludge discharge pipe 9 at the bottom of the membrane bioreactor.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the utility model, the steps may be implemented in any order and there are many other variations of the different aspects of the utility model as above, which are not provided in detail for the sake of brevity.
The embodiments of the utility model are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. A membrane bioreactor, comprising:
at least one membrane module, packing, stuffing box and shaking module;
the membrane components are fixed in the stuffing box, the stuffing is arranged in the stuffing box and is positioned between the membrane components, and the shaking component is connected with the membrane components;
the stuffing box is provided with a screen structure, and the mesh aperture of the screen structure is smaller than the diameter of the inscribed sphere of the stuffing.
2. The membrane bioreactor according to claim 1, wherein the filler is polyurethane and has a cubic shape with a side length of 1.5cm or more and 2cm or less.
3. The membrane bioreactor of claim 1, wherein a spacing between two of the membrane modules is greater than twice a diameter of an outer sphere of the packing.
4. The membrane bioreactor of claim 1, wherein the shaking assembly comprises a truss, a motor, and a drive rod;
the truss is connected with one end of the membrane component and is connected with the output end of the motor through the transmission rod.
5. The membrane bioreactor of claim 1, wherein the total volume of the packing is greater than or equal to 50% and less than or equal to 70% of the actual volume of the packing.
6. The membrane bioreactor of claim 1, further comprising a tank and a sludge discharge pipe;
the stuffing box is fixed inside the box body, and the mud pipe is fixed on the outer wall of the box body.
7. The membrane bioreactor of claim 6, further comprising a gas supply tube and at least one aerator;
the air supply pipe is arranged at the bottom of the stuffing box, an air inlet of the air supply pipe extends out of the box body, and the side wall of the air supply pipe is provided with at least one air outlet;
the air inlet of the aerator is connected with the air outlet of the air supply pipe, and the air outlet of the aerator faces the membrane component.
8. The membrane bioreactor of claim 1, further comprising a water collection pipe;
the water collecting pipe is connected with one end, far away from the shaking component, of the membrane component.
9. The membrane bioreactor of claim 8, further comprising a pressure sensor;
the pressure sensor is arranged on the water collecting pipe and is electrically connected with the shaking assembly.
10. The membrane bioreactor of claim 1, wherein the membrane module comprises hollow fiber membranes and a fixation plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222853160.3U CN219701588U (en) | 2022-10-27 | 2022-10-27 | Membrane bioreactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222853160.3U CN219701588U (en) | 2022-10-27 | 2022-10-27 | Membrane bioreactor |
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| Publication Number | Publication Date |
|---|---|
| CN219701588U true CN219701588U (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222853160.3U Expired - Fee Related CN219701588U (en) | 2022-10-27 | 2022-10-27 | Membrane bioreactor |
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| CN (1) | CN219701588U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120271130A (en) * | 2025-06-10 | 2025-07-08 | 湖南三友环保科技有限公司 | Elastic microcarrier, preparation method and application thereof |
-
2022
- 2022-10-27 CN CN202222853160.3U patent/CN219701588U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120271130A (en) * | 2025-06-10 | 2025-07-08 | 湖南三友环保科技有限公司 | Elastic microcarrier, preparation method and application thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20230919 |
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| CF01 | Termination of patent right due to non-payment of annual fee |