CN216549817U - Membrane bioreactor and sewage treatment device - Google Patents
Membrane bioreactor and sewage treatment device Download PDFInfo
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- CN216549817U CN216549817U CN202122958735.3U CN202122958735U CN216549817U CN 216549817 U CN216549817 U CN 216549817U CN 202122958735 U CN202122958735 U CN 202122958735U CN 216549817 U CN216549817 U CN 216549817U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model provides a membrane bioreactor and a sewage treatment device, wherein the membrane bioreactor comprises a reactor main body, a membrane box arranged in the reactor main body, and a water inlet mechanism arranged on one side of the membrane box, wherein a flow pushing mechanism is also arranged in the reactor main body, the flow pushing mechanism comprises at least one submersible flow pusher arranged on one side of the membrane box and an aeration pipe arranged on the lower side of the membrane box, and a fan is arranged on one side of the aeration pipe away from the membrane box. Through setting up the aeration pipe in the downside of membrane case, wash away the membrane case for the reactor main part oxygen suppliment in the time, prevent the membrane pollution, compare in the facultative anaerobism membrane bioreactor among the prior art, cancel the aeration pipeline of laying in the region outside the membrane case lower part, the redox potential in the region outside the membrane case lower part in the reactor main part has been reduced in other words, in order to reduce COD and consume, and through setting up dive impeller, it flows to promote muddy water mixture in the reactor main part, accelerate the mass transfer, reach the effect of the quick degradation of pollutant, improve nitrogen and phosphorus removal effect.
Description
Technical Field
The utility model relates to the technical field of water treatment, in particular to a membrane bioreactor and a sewage treatment device.
Background
With the rapid development of the industry, a large amount of industrial wastewater is generated, and the pollution to the environment needs to be reduced by treating the wastewater. As a high-efficiency and practical sewage treatment device, the membrane bioreactor is widely applied to municipal sewage and various organic industrial wastewater treatment.
The publication number is; chinese patent of CN200910115352.0 discloses a facultative membrane bioreactor, specifically discloses: the aeration intensity is intensively distributed below the membrane component, the scouring effect on the membrane is kept, so that the middle lower part of the membrane component forms a local aerobic environment, and the facultative or anaerobic environment is formed in the system except the middle lower part of the membrane component by controlling the aeration quantity. However, the facultative membrane bioreactor process has limited denitrification effect when the COD (chemical oxygen demand) concentration of the inlet water is low.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a membrane bioreactor, aiming at solving the technical problem that the denitrification effect is limited when the COD concentration of inlet water is low in the facultative membrane bioreactor process in the prior art.
In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a membrane bioreactor, includes the reactor main part and locates membrane case in the reactor main part, membrane bioreactor is still including locating the mechanism of intaking of membrane case one side, still be equipped with in the reactor main part and push away a class mechanism, push away a class mechanism including locating at least one dive impeller of membrane case one side, membrane bioreactor still includes aeration mechanism, aeration mechanism is including locating the aeration pipe of membrane case downside, the aeration pipe is kept away from one side of membrane case is equipped with the fan.
Compared with the prior art, the utility model has the beneficial effects that: by arranging the aeration component and particularly arranging the aeration pipe at the lower side of the membrane box, the membrane box is washed while oxygen is supplied to the reactor main body, membrane pollution is prevented, simultaneously, compared with the facultative membrane bioreactor in the prior art, the facultative membrane bioreactor cancels the aeration pipeline laid in the area except the lower part in the membrane tank, reduces the oxidation-reduction potential of the area except the lower part in the membrane tank in the main body of the reactor, adds a plug flow mechanism, in order to reduce COD consumption, particularly, the submersible water impeller is arranged to push a mud-water mixture in the reactor main body to flow, the sludge and the inlet water are uniformly mixed, so that sewage and sludge in the reactor main body are uniformly mixed and continuously flow, the sewage enters the reactor main body through the water inlet mechanism and can be rapidly dispersed in the reactor main body, better contacts with the sludge, accelerates mass transfer, thereby achieving the effect of fast degradation of pollutants and improving the effect of nitrogen and phosphorus removal.
According to one aspect of the above technical scheme, the submersible water impeller is arranged between the water inlet mechanism and the membrane box.
According to the one hand of above-mentioned technical scheme, water inlet mechanism is including locating the first inlet tube of reactor main part one side, first inlet tube is kept away from the membrane case sets up, water inlet mechanism is still including locating first inlet tube with dive impeller between the second inlet tube.
According to one aspect of the technical scheme, the water inflow of the first water inlet pipe accounts for 70% -80% of the total water inflow, and the water inflow of the second water inlet pipe accounts for 20% -30% of the total water inflow.
According to one aspect of the technical scheme, the membrane bioreactor further comprises a water production pump arranged on one side of the reactor main body, and the water production pump is connected with the membrane box through a conveying pipe.
According to one aspect of the above technical scheme, the reactor main body is a strip-shaped tank body.
According to one aspect of the above technical scheme, the reactor main body is a streamline reactor main body with a cylinder in the middle and hemispheres on two sides.
The utility model also provides a sewage treatment device which comprises the membrane bioreactor in the technical scheme.
Drawings
FIG. 1 is a schematic cross-sectional view of a membrane reactor body according to a first embodiment of the present invention;
FIG. 2 is a schematic top view of a membrane reactor body according to a first embodiment of the present invention;
FIG. 3 is a comparison table of TN concentration sampling of inlet and outlet water of reactor A and reactor B;
description of the main element symbols:
the device comprises a first water inlet pipe 1, a second water inlet pipe 2, a submersible water impeller 3, a membrane box 4, a water producing pump 5 and a fan 6;
the following detailed description will further illustrate the utility model in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Several embodiments of the utility model are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, a membrane bioreactor in a first embodiment of the present invention is shown, and includes a reactor main body, a membrane tank 4 disposed in the reactor main body, a water inlet mechanism disposed on one side of the membrane tank 4, a flow pushing mechanism disposed in the reactor main body, at least one submersible flow impeller 3 disposed on one side of the membrane tank 4, an aeration mechanism including an aeration pipe disposed on the lower side of the membrane tank 4, and a fan 6 disposed on one side of the aeration pipe away from the membrane tank 4.
Specifically, the membrane bioreactor in this embodiment is provided with the aeration component, and specifically, the aeration pipe is arranged at the lower side of the membrane tank 4, so as to provide oxygen for the reactor main body and wash the membrane tank 4, thereby preventing membrane pollution, and compared with the facultative membrane bioreactor in the prior art, the membrane bioreactor eliminates the aeration pipeline laid in the region except the middle lower part of the membrane tank 4, which is equivalent to reduce the oxidation-reduction potential of the region except the middle lower part of the membrane tank 4 in the reactor main body, so as to reduce the consumption of COD, and the flow pushing mechanism is added, specifically, the submersible flow impeller 3 is arranged to push the mud-water mixture in the reactor main body to flow, the sludge and the inlet water are uniformly mixed, so that the sewage and the sludge in the reactor main body are uniformly mixed and continuously flow, the sewage can be rapidly dispersed in the reactor main body after entering the reactor main body through the water inlet mechanism, and is better contacted with the sludge, the mass transfer is accelerated, thereby achieving the effect of quickly degrading pollutants and improving the effects of nitrogen and phosphorus removal.
In addition, in this embodiment, the membrane bioreactor further comprises a water production pump 5 arranged on one side of the reactor main body, and the water production pump 5 is connected with the membrane tank 4 through a conveying pipe.
In this embodiment, the number of the above-mentioned dive impeller 3 is one, and locate water inlet mechanism with between the membrane case 4, specifically, water inlet mechanism is including locating the first inlet tube 1 of reactor main part one side, first inlet tube 1 is kept away from membrane case 4 sets up, and this water inlet mechanism is still including locating first inlet tube 1 with second inlet tube 2 between the dive impeller 3.
In some application scenes of the embodiment, the water inflow of the first water inlet pipe 1 accounts for 70% -80% of the total water inflow, the water inflow of the second water inlet pipe 2 accounts for 20% -30% of the total water inflow, the submersible water impeller 3 is arranged in the region outside the membrane box 4 in the reactor main body, so that the water flow speed is about 0.1m/s-0.3m/s, sewage and sludge in the reactor main body are uniformly mixed and continuously flow, the sewage can be rapidly dispersed in the reactor main body after entering the reactor main body, the sewage can be well contacted with the sludge, the mass transfer is accelerated, and the effect of rapid pollutant degradation is achieved.
Conveniently, in this embodiment, the aeration pipe is arranged at the lower side of the membrane box 4, so that the aeration intensity is intensively distributed below the membrane box 4, the washing effect on the membrane is maintained, a local aerobic environment is formed at the middle lower part of the membrane box 4, and the biochemical reaction conditions are improved for aerobic rapid decomposition of organic matters, aerobic nitrification of microorganisms and aerobic phosphorus absorption; by controlling the aeration amount, the area of the reactor main body except the middle lower part of the membrane box 4 forms a facultative or anaerobic environment, and the concentration of dissolved oxygen is lower than 1.0 mg/L; by maintaining most of the area in the reactor main body in the state that the dissolved oxygen concentration is less than 1.0mg/L, facultative microorganisms in the reactor main body are gradually in an advantageous position to form a bacterial phase state which mainly comprises facultative bacteria and in which aerobic bacteria and facultative bacteria coexist, and meanwhile, the contact between a carbon source and denitrifying bacteria is increased, the utilization of the carbon source by the facultative bacteria is enhanced, the utilization of the carbon source by the aerobic bacteria is reduced, and the environmental denitrification function is enhanced.
In this embodiment, the reactor main body is a strip-shaped tank body, and specifically, to further improve the plug flow effect of the plug flow mechanism, the reactor main body is a streamlined tank body with a cylindrical middle part and hemispheres on both sides, so that the reactor main body has no dead angle and is matched with the plug flow mechanism to form a stable flow field.
Conveniently, the reactor a is a membrane bioreactor in the prior art, the reactor B is a membrane bioreactor in the embodiment, the type of the reactor a is the same as that of the reactor B, the total length of the membrane bioreactor equipment is 15 meters, the height of the membrane bioreactor equipment is 2.8 meters, the width of the membrane bioreactor equipment is 2 meters, and the control operation parameters are completely the same, and the difference is that: the aeration mechanism in the reactor A also comprises an aeration pipe arranged in the area except the middle lower part of the membrane box 4; the flow pushing mechanism in the reactor B comprises a submersible flow pusher 3 arranged in a reactor main body, the distance between the submersible flow pusher 3 and one side of the reactor main body far away from a membrane box 4 is 6-9 m, the submersible flow pusher is installed at an oblique angle, the angle is 30-45 degrees to the horizontal plane, the bottom of the flow pusher is 0.3-0.5 m from the bottom of the reactor main body, the membrane box 4 is 32-4 m from the submersible flow pusher, the membrane box 4 is 2-3 m from the right side of membrane reactor main body equipment, the rotating speed of a blade pulp of the submersible flow pusher 3 can be adjusted in a variable frequency mode, the diameter of the blade pulp is 220mm, and the water flow speed at the left side of the membrane reactor main body equipment is 0.1m/s-0.3 m/s. In some application scenarios of this embodiment, the reactor a and the reactor B treat the same batch of sewage, the average COD concentration of the treated sewage is lower than 150mg/L, the COD/TN (total nitrogen amount) is substantially between 2 and 7, and the inlet water fluctuation is large. Experiments show that when the reactor A and the reactor B operate stably, the ammonia nitrogen in the effluent of the reactor A and the reactor B is less than 1 mg/L.
As can be seen from FIG. 3, in the case of the influent COD/TN being low, the average total nitrogen concentrations of the reactor A and the reactor B were 9.21mg/L and 6.91mg/L, respectively, and the total nitrogen removal rate of the reactor B was improved by about 23.27% as compared with the reactor A, indicating that the denitrification effect of the reactor B was superior to that of the reactor A.
Incidentally, since the COD/TN of the influent water is low, the aeration of the region other than the middle lower part of the membrane tank 4 in the reactor A consumes part of the COD, further reducing the carbon source available for denitrification, thereby affecting the denitrification effect. In addition, the mechanical shearing action of the impeller accelerates the crushing, cell melting and degradation of the sludge in the reactor main body, and provides a part of biochemical carbon source for denitrification. Because various denitrification ways such as nitrification denitrification, short-cut nitrification denitrification, synchronous nitrification denitrification, anaerobic ammonia oxidation and the like exist in the reactor main body at the same time, because the areas except the middle lower part of the membrane box 4 in the reactor B are not aerated, the dissolved oxygen concentration in the areas except the middle lower part of the membrane box 4 is lower than that in the reactor A, and the generation of denitrification ways for saving carbon sources such as short-cut nitrification denitrification, synchronous nitrification denitrification, anaerobic ammonia oxidation and the like is facilitated.
In summary, in the membrane bioreactor in the above embodiment of the present invention, by arranging the aeration component and specifically arranging the aeration pipe at the lower side of the membrane tank 4, a local aerobic environment is formed at the middle lower part of the membrane tank 4, which improves biochemical reaction conditions for aerobic rapid decomposition of organic matters, aerobic nitrification of microorganisms and aerobic phosphorus uptake, and simultaneously flushes the membrane tank 4 to prevent membrane pollution, and compared with the facultative membrane bioreactor in the prior art, the membrane bioreactor eliminates the aeration pipeline laid in the region other than the middle lower part of the membrane tank 4, which is equivalent to reducing the oxidation-reduction potential of the region other than the middle lower part of the membrane tank 4 in the reactor main body, so that the facultative microorganisms in the reactor main body are gradually in an dominant position to form a facultative bacteria as a main part, aerobic bacteria and facultative bacteria coexist, simultaneously, the contact between a carbon source and denitrifying bacteria is increased, the utilization of the heterotrophic facultative bacteria to the carbon source is enhanced, the utilization of the carbon source by the aerobic bacteria is reduced, the environmental denitrification function is enhanced, simultaneously, a flow pushing mechanism is increased, particularly, a submersible flow impeller 3 is arranged to push a muddy water mixture in a reactor main body to flow, the sludge and inlet water are uniformly mixed to enable sewage and sludge in the reactor main body to be uniformly mixed and continuously flow, the sewage can be rapidly dispersed in the reactor main body after entering the reactor main body through the water inlet mechanism, better contact with the sludge is realized, the mass transfer is accelerated, the effect of rapidly degrading pollutants is achieved, and the denitrification and dephosphorization effects are improved.
The second embodiment of the utility model also provides a sewage treatment device, which comprises the membrane reactor main body in the embodiment, and by arranging the membrane bioreactor, the COD concentration of inlet water is lower, specifically lower than 200mg/L, and meanwhile, the COD/TN <5 sewage can relatively improve the denitrification and dephosphorization effect and improve the sewage treatment effect.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The utility model provides a membrane bioreactor, its characterized in that includes the reactor main part and locates membrane case in the reactor main part, membrane bioreactor is still including locating the mechanism of intaking of membrane case one side, still be equipped with in the reactor main part and push away a class mechanism, it is including locating to push away a class mechanism at least one dive impeller of membrane case one side, membrane bioreactor still includes aeration mechanism, aeration mechanism is including locating the aeration pipe of membrane case downside, the aeration pipe is kept away from one side of membrane case is equipped with the fan.
2. The membrane bioreactor of claim 1, wherein the submersible water impeller is disposed between the water inlet mechanism and the membrane tank.
3. The membrane bioreactor of claim 2, wherein the water inlet mechanism comprises a first water inlet pipe disposed on one side of the reactor body, the first water inlet pipe is disposed away from the membrane tank, and the water inlet mechanism further comprises a second water inlet pipe disposed between the first water inlet pipe and the submersible water impeller.
4. A membrane bioreactor according to claim 3, wherein the water intake of the first water inlet pipe accounts for 70-80% of the total water intake and the water intake of the second water inlet pipe accounts for 20-30% of the total water intake.
5. The membrane bioreactor of claim 1, further comprising a water production pump disposed on one side of the reactor body, the water production pump being connected to the membrane tank via a delivery pipe.
6. The membrane bioreactor according to any one of claims 1 to 5, wherein the reactor body is a strip tank body.
7. The membrane bioreactor of any one of claims 1-5, wherein the reactor body is a streamlined tank body with a cylindrical middle part and hemispheres on both sides.
8. A wastewater treatment plant comprising a membrane bioreactor according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122958735.3U CN216549817U (en) | 2021-11-29 | 2021-11-29 | Membrane bioreactor and sewage treatment device |
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| CN202122958735.3U CN216549817U (en) | 2021-11-29 | 2021-11-29 | Membrane bioreactor and sewage treatment device |
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| CN216549817U true CN216549817U (en) | 2022-05-17 |
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