CN218089110U

CN218089110U - MBR membrane method sewage treatment system

Info

Publication number: CN218089110U
Application number: CN202221728556.9U
Authority: CN
Inventors: 李彦波; 马志敬; 周科; 王淼龙
Original assignee: Hydrogeology Bureau of China National Administration of Coal Geology
Current assignee: China Coal District Huasheng Hydrogeological Exploration Co ltd
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-12-20
Anticipated expiration: 2032-07-05

Abstract

The utility model relates to an MBR membrane method sewage treatment system, which comprises a biological reaction tank, a membrane filtering device and a back washing device, wherein the membrane filtering device is fixedly arranged in the biological reaction tank and is communicated with one end of a drain pipe, the other end of the drain pipe extends out of the biological reaction tank, and a drainage pump is fixedly arranged on the drain pipe; the back washing device is communicated with the part of the drain pipe corresponding to the position between the drain pump and the membrane filtering device through the back washing pipe. The beneficial effects of the utility model are that simple structure, reasonable in design both can be the rapid treatment who realizes sewage, can also adopt hydrogen peroxide to realize reverse quick washing to the MBR membrane, washs the produced mineral salinity of MBR membrane and does not have the increase, is less to the influence of microorganism, and is water and carbon dioxide through the result after hydrogen peroxide and pollutant reaction, does not have the influence to environmental load, does not have destruction to whole ecosystem, has reached cleaner production's purpose.

Description

MBR membrane method sewage treatment system

Technical Field

The utility model relates to a sewage treatment device technical field, concretely relates to MBR embrane method sewage treatment system.

Background

With the development of society, MBR membrane method technology is applied more and more widely in the sewage treatment industry, and the main application fields include the domestic sewage treatment field, the industrial water treatment field, the oily wastewater field and the like. The amount of the used medicaments in the MBR membrane method is also increasing, the main used medicaments are citric acid and sodium hypochlorite, and the two medicaments are most widely applied in the water treatment industry. The two agents mainly play a role in cleaning MBR membranes, but in the application process, the two agents are found to have certain damage effect on the membranes and inhibition effect on aerobic microorganisms in the process of cleaning the membranes. By researching the MBR membrane technology, the mechanism of cleaning the membrane is known, the concentration of a contrast agent, the reflection time and other factors influence the removal rate and the cleaning rate of COD, SS, the membrane dialysis rate and other factors, and by researching and comparing various agents, hydrogen peroxide is used in practice, so that the removal rate and the cleaning rate are greatly improved, and the influence of microorganisms is low. The application of the MBR membrane method medicament improvement in domestic sewage, oily wastewater and industrial water treatment has a positive influence on the water treatment industry.

MBR membrane method for treating wastewater is more and more widely applied, but the problems are more and more, especially the problem of membrane blockage is more and more serious, so that the wastewater is cleaned by using medicaments, and the selection of which medicament is used for cleaning is particularly important.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an MBR membrane process sewage treatment system is provided, aim at solving the problem among the prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

an MBR membrane method sewage treatment system comprises a biological reaction tank, a membrane filtering device and a back washing device, wherein the membrane filtering device is fixedly arranged in the biological reaction tank and is communicated with one end of a drain pipe, the other end of the drain pipe extends out of the biological reaction tank, and a drainage pump is fixedly arranged on the drain pipe;

the back washing device is communicated with the drain pipe through a back washing pipe corresponding to the position between the drainage pump and the membrane filtering device.

The utility model has the advantages that: when the sewage treatment device normally operates, firstly, sewage to be treated is sent to a biological reaction tank for biological reaction in a manner that can be thought by a person skilled in the art, so that pollutants in the sewage are removed to achieve a purification effect; then, the water is filtered through a membrane filtering device, impurities in the water are removed, and the sewage purification effect is further improved; finally, the filtered water is sent out by a drainage pump through a drainage pipe, so that the sewage is quickly treated, and the treatment effect is better;

during washing, the back washing liquid is conveyed to the membrane filtering device through the back washing pipe and the drain pipe by the back washing device so as to carry out back washing on the membrane filtering device, thereby achieving the effect of cleaning the membrane filtering device and ensuring the water filtering quality.

The utility model discloses simple structure, reasonable in design both can be the quick processing who realizes sewage, can also adopt hydrogen peroxide to realize reverse quick washing to the MBR membrane, and the produced mineral salinity of washing MBR membrane does not have the increase, and is less to the influence of microorganism, and is water and carbon dioxide through the result after hydrogen peroxide and pollutant reaction, does not have the influence to environmental load, does not have destruction to whole ecosystem, has reached cleaner production's purpose.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the biological reaction tank comprises a tank body, the inner space of the tank body is divided into an anaerobic tank for containing anaerobic bacteria and an aerobic tank for containing aerobic bacteria by a vertically arranged partition plate, and the upper part of the partition plate is provided with a through hole group for communicating the anaerobic tank with the aerobic tank; the membrane filtering device is fixedly arranged in the aerobic tank.

When the sewage treatment device is in normal operation, firstly, sewage to be treated is sent to the anaerobic tank in a mode which can be thought by a person skilled in the art, and partial pollutants such as COD, BOD and ammonia nitrogen in the water are decomposed by anaerobic bacteria in the anaerobic tank to eliminate partial pollutants; secondly, the water after anaerobic treatment enters an aerobic tank through the through hole group, and aerobic bacteria in the aerobic tank fully absorb and decompose the remaining part of pollutants all the time so as to achieve the purification effect; then, the water is filtered through a membrane filtering device, impurities in the water are removed, and the sewage purification effect is further improved; and finally, the filtered water is sent out by the drainage pump through the drainage pipe, so that the sewage is quickly treated, and the treatment effect is better.

And the two ends of the reflux pump are communicated with the anaerobic tank and the aerobic tank through pipelines respectively, and the reflux pump is used for sending anaerobic bacteria entering the aerobic tank from the through hole group into the anaerobic tank again.

The beneficial effects of adopting above-mentioned further scheme are that sewage treatment's in-process, partial anaerobism in the anaerobism pond can be along with rivers entering in the aerobic tank, does not guarantee entire system's balance, sends into the anaerobism in the anaerobism pond again through the backwash pump with the anaerobism that gets into in the aerobic tank, guarantees sewage treatment's whole process normal operating.

Further, still include the equalizing basin that is used for storing sewage, the equalizing basin pass through the flow pipe with the anaerobism pond intercommunication, fixed mounting has the delivery pump on the flow pipe.

The beneficial effect of adopting above-mentioned further scheme is that because the quality of water of the sewage that sends every period is different, consequently collect sewage in the equalizing basin earlier, and abundant mixing keeps quality of water always, then passes through the sewage anaerobism pond after the delivery pump will mix, guarantees sewage treatment's effect.

Furthermore, the adjusting tank is communicated with one end of a water supply pipe, and a filter is fixedly arranged on the water supply pipe.

The beneficial effect who adopts above-mentioned further scheme is that sewage treatment's in-process carries out preliminary filtration through above-mentioned filter to sewage in advance, removes the large granule impurity in the sewage, avoids the follow-up processing of large granule impurity influence sewage.

Further, still include the agitator, the agitator is used for with sewage in the equalizing basin homogenizes.

Adopt above-mentioned further scheme's beneficial effect be that the sewage of each period of time send to the equalizing basin back, homogenize through stirring the ware, guarantee sewage treatment's effect.

Further, homogenize the ware and include the fan, the one end and the blast pipe intercommunication of fan, the other end of blast pipe extends to bottom in the equalizing basin.

The beneficial effect who adopts above-mentioned further scheme is that the sewage of each period sends to the equalizing basin back in, blows through the fan to form the bubble in aqueous, the bubble of aquatic is from supreme constantly removing down, thereby homogenizes water.

Further, the other end of the blast pipe is communicated with one end of a branch pipe, and the other end of the branch pipe extends into the aerobic tank.

Adopt the beneficial effect of above-mentioned further scheme to homogenize the water in the aerobic tank through the blast air, guarantee to have sufficient oxygen in the aerobic tank to supply the aerobic bacteria to survive to guarantee sewage treatment's effect.

Furthermore, the back washing device comprises a back washing pump, and the back washing pump is communicated with one end of the back washing pipe.

The beneficial effects of adopting above-mentioned further scheme are that when wasing, in sending the membrane filtration device with backwash liquid through the backwash pump to wash membrane filtration device, avoid membrane processing apparatus to take place to block up, guarantee the filterable effect of sewage.

Further, still include the recovery pond, the other end of drain pipe extends to in the recovery pond.

The beneficial effects of adopting above-mentioned further scheme are that simple structure, reasonable in design, through the water after the recovery pond recovery processing to subsequent use.

Further, the recovery tank is a disinfection tank.

The beneficial effects of adopting above-mentioned further scheme are that simple structure, reasonable in design retrieves and the water after the disinfection treatment through the disinfection pond to follow-up use.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 3 is a schematic structural view of the biological reaction tank of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. draining pump; 2. a partition plate; 3. an anaerobic tank; 4. an aerobic tank; 5. a reflux pump; 6. a regulating tank; 7. a water pump; 8. a fan; 9. a filter; 10. a backwash pump; 11. a recovery tank; 12. an anaerobic organism recovery tank; 13. a membrane filtration device.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1

As shown in fig. 1 to 3, the present embodiment provides an MBR membrane sewage treatment system, which includes a biological reaction tank, a membrane filtering device 13 and a back-flushing device, wherein the membrane filtering device 13 is fixedly installed in the biological reaction tank and is communicated with one end of a drain pipe, the other end of the drain pipe extends out of the biological reaction tank, and a drain pump 1 is fixedly installed on the drain pipe;

the back-flushing device is communicated with a drain pipe corresponding to the position between the drainage pump 1 and the membrane filtering device 13 through a back-flushing pipe.

When the sewage treatment device normally operates, firstly, sewage to be treated is sent to a biological reaction tank for biological reaction in a manner that can be thought by a person skilled in the art, so that pollutants in the sewage are removed to achieve a purification effect; then, the water is filtered by the membrane filtering device 13 to remove impurities in the water, so that the sewage purification effect is further improved; finally, the filtered water is sent out by the drainage pump 1 through a drainage pipe, so that the sewage is quickly treated, and the treatment effect is good;

during washing, the backwash liquid is conveyed to the membrane filtering device 13 through the backwash pipe and the drain pipe by the backwash device so as to carry out backwash on the membrane filtering device 13, thereby achieving the effect of cleaning the membrane filtering device 13 and ensuring the quality of water filtration.

Preferably, in this embodiment, the membrane filtering device 13 is preferably an MBR membrane filter in the prior art, and the specific structure and principle thereof are not described herein again. The MBR membrane filter has the advantages that:

(1) The method can effectively carry out solid-liquid separation, and separates suspended matters, colloidal substances and microbial flora lost by biological units in the wastewater from the purified water;

(2) The biomass in the biological treatment unit can be kept at high concentration, and the volume load is greatly improved;

(3) Because it can prevent the loss of various microbial flora, is beneficial to the growth of slow-growing bacteria (nitrobacteria and the like), and enables various metabolic processes in the system to be smoothly carried out;

(4) The retention time of some macromolecular refractory organic matters is prolonged, so that the macromolecular refractory organic matters are favorable for decomposition;

this embodiment simple structure, reasonable in design both can be the quick processing who realizes sewage, can also adopt hydrogen peroxide to realize reverse quick washing to the MBR membrane, and the produced mineral salinity of washing MBR membrane does not have the increase, and is less to the influence of microorganism, and is water and carbon dioxide through the product after hydrogen peroxide reacts with the pollutant, does not have the influence to environmental load, does not have the destruction to whole ecosystem, has reached cleaner production's purpose.

Example 2

On the basis of the embodiment 1, in the embodiment, the biological reaction tank comprises a tank body, the internal space of the tank body is divided into an anaerobic tank 3 for containing anaerobic bacteria and an aerobic tank 4 for containing aerobic bacteria by a vertically arranged partition plate 2, and the upper part of the partition plate 2 is provided with a through hole group for communicating the anaerobic tank 3 and the aerobic tank 4; the membrane filtering device 13 is fixedly arranged in the aerobic tank 4.

When the sewage treatment device is in normal operation, firstly, sewage to be treated is sent into the anaerobic tank 3 in a manner that can be thought by a person skilled in the art, and partial pollutants such as COD, BOD and ammonia nitrogen in the sewage are decomposed by anaerobic bacteria in the anaerobic tank 3 to eliminate the partial pollutants; secondly, the water after anaerobic treatment enters the aerobic tank 4 through the through hole group, and aerobic bacteria in the aerobic tank 4 fully absorb and decompose the remaining part of pollutants all the time so as to achieve the purification effect; then, the water is filtered by the membrane filtering device 13 to remove impurities in the water, so that the sewage purification effect is further improved; and finally, the filtered water is sent out by the drainage pump 1 through a drainage pipe, so that the sewage is quickly treated, and the treatment effect is better.

Preferably, in this embodiment, the through hole set includes at least one through hole, and the sewage treated in the anaerobic tank 3 enters the aerobic tank 4 through the through hole.

Preferably, in this embodiment, the through hole group includes a plurality of through holes, the plurality of through holes may be linearly distributed on the upper portion of the partition board 2, or may be divided into two groups, and the plurality of through holes in each group of through holes are linearly distributed on the upper portion of the partition board 2.

Preferably, in this embodiment, the anaerobic tank 3 and the aerobic tank 4 are both tank bodies with an open upper end, and sewage is directly fed into the anaerobic tank 3 from the open upper end of the anaerobic tank 3.

In the process of sewage treatment in the aerobic tank 4, the water quality in the aerobic tank 4 needs to be artificially detected every day, and the drainage pump 1 is started when the detected water quality index meets the index in the following table 1:

TABLE 1 Water quality gauge for effluent of biological reaction tank

Contaminants	COD	BOD5	SS	NH ₃ -N	PH
						Unit of	mg/L	mg/L	mg/L	mg/L	6-9
Concentration of	≤50	≤30	≤10	≤15	6-9

Example 3

On the basis of the embodiment 2, the present embodiment further includes a reflux pump 5, and two ends of the reflux pump 5 are respectively communicated with the anaerobic tank 3 and the aerobic tank 4 through pipelines, so as to re-feed the anaerobic bacteria entering the aerobic tank 4 from the through hole group into the anaerobic tank 3.

In the process of sewage treatment, partial anaerobic bacteria in the anaerobic tank 3 can enter the aerobic tank 4 along with water flow, the balance of the whole system is not ensured, and the anaerobic bacteria entering the aerobic tank 4 are sent into the anaerobic tank 3 again through the reflux pump 5, so that the normal operation of the whole process of sewage treatment is ensured.

Preferably, in this embodiment, one end of the pipeline of the reflux pump 5 communicating with the anaerobic tank 3 and the aerobic tank 4 is preferably communicated with the bottom of the anaerobic tank 3 and the bottom of the aerobic tank 4, so as to conveniently send anaerobic bacteria in the aerobic tank 4 into the anaerobic tank 3.

In addition to the above embodiment, one end of the pipeline of the reflux pump 5 communicating with the anaerobic tank 3 and the aerobic tank 4 is preferably communicated with the middle or upper part of the anaerobic tank 3 and the aerobic tank 4, but this solution can only feed part of the anaerobic bacteria in the aerobic tank 4 into the anaerobic tank 3.

In addition, the anaerobic bacteria in the aerobic tank 4 can also be manually sent into the anaerobic tank 3, for example, a part of the anaerobic bacteria in the aerobic tank 4 can be manually sent into the anaerobic tank 3 through a container such as a water ladle, but the mode is laborious and labor-intensive.

It should be noted that the other ends of the two pipelines communicated with the reflux pump 5 may directly extend from the upper openings of the anaerobic tank 3 and the aerobic tank 4 to the bottoms of the anaerobic tank 3 and the aerobic tank 4, or may directly extend through the side walls of the anaerobic tank 3 and the aerobic tank 4 to the anaerobic tank 3 and the aerobic tank 4.

Example 4

On the basis of any one of embodiments 2 to 3, the present embodiment further includes an adjusting tank 6 for storing sewage, the adjusting tank 6 is communicated with the anaerobic tank 3 through a water supply pipe, and a water supply pump 7 is fixedly installed on the water supply pipe.

Because the quality of the sewage sent in each time interval is different, the sewage is firstly collected in the regulating tank 6 and is fully and uniformly mixed, the water quality is kept all the time, and then the effect of sewage treatment is ensured in the sewage anaerobic tank 3 after uniform mixing through the water feeding pump 7.

Preferably, in this embodiment, the adjusting tank 6 is preferably a tank body with an open upper end, so as to be convenient to clean.

Except the above embodiment, also can be higher than the height of anaerobism pond 3 with the setting of equalizing basin 6, the bottom of equalizing basin 6 is passed through the pipeline and is communicated with anaerobism pond 3 this moment, and the sewage in the equalizing basin 6 relies on self gravity to flow to the anaerobism pond 3 in, practices thrift the energy consumption.

At the in-process of sewage mixing in equalizing basin 6, need artifical sewage in to equalizing basin 6 to detect every day, just can open water pump 7 when the index that detects accords with the index in table 2:

TABLE 2 Water quality in the case of water intake in the biological reaction tank

Serial number

Contaminants

COD(mg/L)

BOD(mg/L)

Ammonia nitrogen (mg/L)

SS(mg/L)

PH

1

Numerical value

≤350

≤200

≤40

≤250

6-9

Example 5

In this embodiment, the regulating reservoir 6 communicates with one end of a water supply pipe to which a filter 9 is fixedly attached, in addition to embodiment 4.

In-process of sewage treatment carries out preliminary filtration treatment to sewage through above-mentioned filter 9 in advance, removes the large granule impurity in the sewage, avoids the follow-up processing of large granule impurity influence sewage.

Preferably, in this embodiment, the filter 9 is preferably a grille filter in the prior art, which effectively removes large-particle impurities in the sewage.

Preferably, in this embodiment, the other end of the water supply pipe extends into the sewage supply tank, and a water supply pump is fixedly mounted on the other end of the water supply pipe, and the sewage is fed into the adjusting tank 6 through the water supply pump.

Example 6

On the basis of any one of embodiments 4 to 5, the present embodiment further includes a homogenizer, and the homogenizer is used for homogenizing the sewage in the regulating reservoir 6.

After the sewage of each period of time is sent to equalizing basin 6, homogenize through the homogenizer, guarantee sewage treatment's effect.

In addition to the above embodiments, the sewage in the adjusting tank 6 can be stirred by a manual method, for example, by a stirring rod periodically, but the method is time-consuming, labor-consuming and labor-intensive.

Example 7

On the basis of embodiment 6, this embodiment, homogenize the ware and include fan 8, fan 8's one end and blast pipe intercommunication, the other end of blast pipe extends to the bottom in the equalizing basin 6.

After the sewage of each period of time sent to equalizing basin 6, blown through the fan to form the bubble in aqueous, supreme constantly removes from down to the bubble of aquatic, thereby homogenizes water.

Example 8

On the basis of the embodiment 7, in the embodiment, the other end of the blast pipe extends to the bottom in the regulating tank 6 and is communicated with one end of the branch pipe, and the other end of the branch pipe extends to the aerobic tank 4.

This scheme homogenizes the water in the good oxygen pond 4 through the blast air, guarantees to have sufficient oxygen in the good oxygen pond 4 to supply good oxygen fungus to survive to guarantee sewage treatment's effect.

Besides the above embodiments, the homogenizer can also adopt other modes, for example, motors are respectively erected on the adjusting tank 6 and the aerobic tank 4, the driving ends of the two motors are vertically downward and are respectively fixedly connected with the upper ends of the two stirring shafts, and the lower ends of the two stirring shafts respectively extend into the adjusting tank 6 and the aerobic tank 4. The two motors respectively drive the two stirring shafts to rotate so as to stir the water in the adjusting tank 6 and the water in the aerobic tank 4.

Example 9

On the basis of the above embodiments, in the present embodiment, the backwashing device includes the backwashing pump 10, and the backwashing pump 10 is communicated with one end of the backwashing pipe.

During cleaning, the backwash liquid is sent to the membrane filtering device 13 through the backwash pump 10 so as to clean the membrane filtering device 13, prevent the membrane processing device from being blocked and ensure the sewage filtering effect.

Preferably, in this embodiment, the backwash pump 10 is connected to a tank containing backwash liquid through a pipe.

Preferably, in this embodiment, the backwash liquid is preferably hydrogen peroxide, and the MBR membrane is cleaned by oxidation of the hydrogen peroxide to finally generate carbon dioxide and water, so that the dialysis rate of the cleaned membrane is better, and the generated reaction product is harmless to the environment and has no secondary pollution, and the specific chemical formula is as follows:

H _X C _X O _X +H ₂ O ₂ →CO ₂ ↑+H ₂ O

the reason why the membrane filtration device 13 is cleaned with hydrogen peroxide is as follows: the hydrogen peroxide can effectively clean the membrane filtering device 13, and the influence on the microorganisms, namely the anaerobic bacteria in the anaerobic tank 3 and the aerobic bacteria in the aerobic tank 4, is small, so that the microorganisms can be inhibited for a short time, but the microorganisms cannot be killed, the survival rate of the microorganisms is ensured, and the effect of subsequent sewage treatment is ensured.

In addition, during sewage treatment, the drainage pump 1 can be started and the backwashing pump 10 can be closed through the controller; during backwashing, the backwashing pump 10 can be started by the controller and the drainage pump 1 is closed.

In addition to the above embodiments, valves may be fixedly installed at the portions of the backwash pipe and the drain pipe close to the drain pump 1, respectively, and the two valves are preferably electronic valves and connected to the controller through lines, respectively. When the sewage is treated, the controller can start the drainage pump 1 and open the electronic valve on the drainage pipe, and simultaneously close the backwashing pump 10 and the electronic valve on the backwashing pipe; during back flushing, the back flushing pump 10 and the electronic valve on the back flushing pipe can be started by the controller, and meanwhile, the drainage pump 1 is closed and the electronic valve on the drainage pipe is opened.

Example 10

On the basis of the above embodiments, the present embodiment further includes a recycling tank 11, and the other end of the drain pipe extends into the recycling tank 11.

This scheme simple structure, reasonable in design, through 11 recovery processing's of recovery pond water to follow-up use.

Preferably, the present embodiment further comprises an anaerobe recovery tank 12, wherein the anaerobe recovery tank 12 is used for recovering anaerobes in the anaerobe tank 3.

In addition, the anaerobic organism recovery tank 12 and the water return tank 11 are arranged side by side.

Preferably, in this embodiment, the recycling tank 11 is a sterilizing tank filled with a disinfectant such as quicklime.

This scheme simple structure, reasonable in design retrieves and the water after the disinfection through the disinfection pond to follow-up use.

The working principle of the utility model is as follows:

when the device normally operates, firstly, sewage is delivered into the regulating tank 6 through a water supply pump, and water in the regulating tank 6 is uniformly stirred by blowing air through the fan 8; secondly, uniformly mixing the sewage in the regulating tank 6 in the anaerobic sewage tank 3 through a water feeding pump 7, and decomposing partial pollutants such as COD, BOD and ammonia nitrogen in the water through anaerobic bacteria in the anaerobic sewage tank 3 to eliminate partial pollutants; thirdly, the water after anaerobic treatment enters the aerobic tank 4 through the through hole group, and aerobic bacteria in the aerobic tank 4 fully absorb and decompose the remaining pollutants all the time to achieve the purification effect; fourthly, the water is filtered through a membrane filtering device 13, so that impurities in the water are removed, and the sewage purification effect is further improved; fifthly, the filtered water is sent to the recovery tank 11 through the drain pipe by the drain pump 1, so that the sewage is rapidly treated, and the treatment effect is good.

During cleaning, the hydrogen peroxide backwash liquid is sent to the membrane filtering device 13 through the backwash pump 10 to clean the membrane filtering device 13, so that the membrane treatment device is prevented from being blocked, and the sewage filtering effect is ensured.

In addition, after the flushing is finished, the flushing liquid can be discharged through a water outlet arranged at the bottom of the aerobic tank 4.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a MBR embrane method sewage treatment system which characterized in that: the device comprises a biological reaction tank, a membrane filtering device (13) and a back washing device, wherein the membrane filtering device (13) is fixedly arranged in the biological reaction tank and is communicated with one end of a drain pipe, the other end of the drain pipe extends out of the biological reaction tank, and a drainage pump (1) is fixedly arranged on the drain pipe;

the back washing device is communicated with the drain pipe through a back washing pipe corresponding to the position between the drainage pump (1) and the membrane filtering device (13).

2. The MBR membrane process sewage treatment system of claim 1, wherein: the biological reaction tank comprises a tank body, the inner space of the tank body is divided into an anaerobic tank (3) and an aerobic tank (4) by a vertically arranged partition plate (2), and the upper part of the partition plate (2) is provided with a through hole group communicated with the anaerobic tank (3) and the aerobic tank (4); the membrane filtering device (13) is fixedly arranged in the aerobic tank (4).

3. The MBR membrane process wastewater treatment system of claim 2, wherein: the anaerobic tank is characterized by further comprising a reflux pump (5), wherein two ends of the reflux pump (5) are communicated with the anaerobic tank (3) and the aerobic tank (4) through pipelines respectively.

4. The MBR membrane process wastewater treatment system of claim 2, wherein: the anaerobic tank is characterized by further comprising an adjusting tank (6), wherein the adjusting tank (6) is communicated with the anaerobic tank (3) through a water supply pipe, and a water supply pump (7) is fixedly mounted on the water supply pipe.

5. The MBR membrane process sewage treatment system of claim 4, wherein: the adjusting tank (6) is communicated with one end of a water supply pipe, and a filter (9) is fixedly arranged on the water supply pipe.

6. The MBR membrane process sewage treatment system of claim 4, wherein: the sewage treatment device also comprises a stirrer, wherein the stirrer is used for stirring the sewage in the regulating tank (6) uniformly.

7. The MBR membrane process sewage treatment system of claim 6, wherein: the homogenizer comprises a fan (8), one end of the fan (8) is communicated with the blast pipe, and the other end of the blast pipe extends to the bottom in the adjusting tank (6).

8. The MBR membrane process sewage treatment system of claim 7, wherein: the air supply pipe is communicated with one end of the branch pipe, and the other end of the branch pipe extends into the aerobic tank (4).

9. The MBR membrane process wastewater treatment system according to any one of claims 1 to 8, wherein: the back washing device comprises a back washing pump (10), and the back washing pump (10) is communicated with one end of the back washing pipe.

10. The MBR membrane process wastewater treatment system according to any one of claims 1 to 8, wherein: the device also comprises a recovery tank (11), and the other end of the drain pipe extends into the recovery tank (11).