Wastewater treatment device

Abstract

The embodiment of the utility model provides a wastewater treatment device, and relates to the technical field of wastewater treatment. The device comprises a reactor, a filter and a liquid outlet pipe, a reaction cavity is formed in the reactor, a water inlet and an exhaust port are formed in the reaction cavity, and the reaction cavity is used for containing activated sludge reacting with wastewater; a filter cavity is formed in the filter, and a membrane assembly is arranged in the filter cavity and used for filtering reaction liquid obtained after the wastewater reacts with the activated sludge; the reaction cavity is provided with a liquid outlet, the filtering cavity is provided with a liquid inlet, and the liquid outlet pipe is connected between the liquid outlet and the liquid inlet. According to the wastewater treatment device provided by the embodiment of the invention, the reactor and the filter are independently arranged and are isolated from the reaction cavity of the reactor, so that most sludge and microorganisms are left in the reactor, the contact between the sludge and the filter membrane and the contact between the microorganisms and the filter membrane are effectively reduced, and the treatment efficiency of the membrane bioreactor is further ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, and particularly relates to a wastewater treatment device. BACKGROUND

[0002] A membrane bio-reactor (MBR) is a new type of wastewater treatment system which combines membrane separation technology and biological treatment technology. The membrane bio-reactor uses microorganisms in a biological reactor to degrade organic matter in water, and then separates the microorganisms and water through a membrane assembly separation technology, so as to realize water purification. At the same time, the filtration of the membrane assembly can intercept suspended solids, macromolecular organic matter and microorganisms in the water, so as to ensure clean effluent water quality.

[0003] In the related art, the membrane assembly is directly arranged in the inner cavity of the reactor. However, since the membrane assembly is directly exposed to the inner cavity environment of the reactor, sludge and microorganisms can directly contact the membrane surface, so that the membrane surface is easily clogged by sludge and attached by microorganisms, thereby reducing the permeability of the filtration membrane and further reducing the treatment efficiency of the membrane bio-reactor. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a wastewater treatment device, which solves the problem that the membrane assembly is easily clogged by sludge and attached by microorganisms, resulting in reduced permeability of the filtration membrane.

[0005] The present application provides a wastewater treatment device, which comprises:

[0006] A reactor, wherein the reactor is internally provided with a reaction cavity, the reaction cavity is provided with a water inlet and an exhaust port, and the reaction cavity is used for arranging activated sludge for reacting with wastewater;

[0007] A filter, wherein the filter is internally provided with a filter cavity, the filter cavity is provided with a membrane assembly, and the membrane assembly is used for filtering reaction liquid after the wastewater reacts with the activated sludge;

[0008] A liquid outlet pipe, wherein the reaction cavity is provided with a liquid outlet, the filter cavity is provided with a liquid inlet, and the liquid outlet pipe is connected between the liquid outlet and the liquid inlet.

[0009] In an optional embodiment, the wastewater treatment device further comprises an aeration assembly, wherein the aeration assembly comprises:

[0010] An aeration pipe, wherein one end of the aeration pipe is provided with an aeration section, and the other end of the aeration pipe is used for being connected with a gas source, wherein the aeration section is provided with a plurality of aeration ports, and the aeration ports are arranged towards the membrane assembly;

[0011] A waterproof and breathable membrane, wherein the waterproof and breathable membrane is arranged at the aeration ports.

[0012] In an alternative embodiment, the membrane assembly comprises at least two membrane tanks, the membrane tank is a filter membrane, and the membrane tank is provided with a water outlet; wherein the aeration section is arranged at the bottom of the membrane tank, and the liquid inlet is arranged at the top of the reaction cavity.

[0013] In an alternative embodiment, two adjacent membrane tanks are arranged at intervals, the interval between the two adjacent membrane tank bodies is 450-750 mm, and the interval between the membrane tank body and the filter cavity wall is 400-700 mm.

[0014] In an alternative embodiment, the membrane assembly further comprises a support, the support is arranged at the bottom of the filter cavity, the membrane tank is arranged on the upper side of the support, and the membrane tank and the support are detachably connected.

[0015] In an alternative embodiment, the filter membrane is a flat sheet membrane, a hollow fiber membrane, a tubular membrane, or a disc membrane.

[0016] In an alternative embodiment, the pore size of the filter membrane is 0.01-0.25 μm.

[0017] In an alternative embodiment, the aeration assembly further comprises:

[0018] a membrane pressure gauge arranged on the membrane tank body, the membrane pressure gauge being used to measure the surface pressure of the filter membrane;

[0019] a control valve arranged on the aeration pipe, the control valve being used to control the gas flow of the aeration pipe;

[0020] a controller arranged on the body of the filter, and the membrane pressure gauge and the control valve are connected to the controller.

[0021] In an alternative embodiment, the wastewater treatment device further comprises a backflow pipe, the filter cavity is provided with a sludge outlet, the reaction cavity is provided with a sludge return port, and the backflow pipe is connected between the sludge outlet and the sludge return port.

[0022] In an alternative embodiment, the wastewater treatment device further comprises a water inlet assembly, the water inlet assembly comprises:

[0023] a stirring barrel;

[0024] a water inlet pipe, one end of the water inlet pipe being connected to the stirring barrel, and the other end being connected to the water inlet;

[0025] a water inlet pump arranged on the water inlet pipe, the water inlet pump being used to pass the wastewater in the stirring barrel into the reaction cavity.

[0026] The wastewater treatment device provided by the application has the advantages that the reactor and the filter are independently arranged, the membrane assembly is arranged in the filtering cavity of the filter and is isolated from the reaction cavity of the reactor, most of the sludge and microorganisms are left in the reactor after the reaction liquid obtained by the reaction of the wastewater and the activated sludge enters the filter through the liquid outlet pipe, the contact between the sludge and the microorganisms and the filtering membrane is effectively reduced, the surface of the membrane assembly is effectively prevented from being blocked by the sludge and the microorganisms, the wastewater treatment efficiency is improved due to the fact that the membrane assembly is not blocked, and the treatment efficiency of the membrane bioreactor is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

[0028] Fig. 1 A structural schematic view of the wastewater treatment device provided by the embodiment of the application is shown in the figure.

[0029] Fig. 2 A structural schematic view of the aeration section of the aeration pipe of the wastewater treatment device provided by the embodiment of the application is shown in the figure.

[0030] Fig. 3 An internal schematic view of the filter of the wastewater treatment device provided by the embodiment of the application is shown in the figure.

[0031] Fig. 4 A top view schematic view of the filter of the wastewater treatment device provided by the embodiment of the application is shown in the figure.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 100- reactor; 110- water inlet; 120- air outlet; 130- liquid outlet; 140- sludge return outlet;

[0034] 200- filter; 210- liquid inlet; 220- membrane assembly; 221- membrane box; 222- water outlet; 230- sludge outlet; 240- support;

[0035] 300- liquid outlet pipe;

[0036] 400- aeration assembly; 410- aeration pipe; 411- aeration port; 420- membrane pressure gauge; 450- control valve; 440- controller;

[0037] 500- reflux pipe;

[0038] 600- water inlet assembly; 610- stirring barrel; 620- water inlet pipe; 630- water inlet pump.

[0039] The specific embodiments of the application will now be described in detail with reference to the following figures. These figures and the following description are not meant to limit the application's concepts to a particular embodiment, but to illustrate aspects of the application that can be employed without departing from the scope of the application as claimed. DETAILED DESCRIPTION

[0040] Reference will now be made to specific implementations, examples of which are illustrated in the accompanying drawings. Unless explicitly described as otherwise, the same numerical references will be used throughout the description and the drawings to refer to the same or like components or steps. The following description of specific implementations should not be taken as indicative of all aspects applicable to the application. Rather, they are presented as examples of apparatus and methods consistent with some aspects of the application as detailed in the claims.

[0041] The terms "first", "second", "third", "fourth", and the like used in the description and in the claims of the application, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms in the description is solely intended to distinguish between elements of the application and not to limit the scope of the application to any particular order. Unless otherwise stated, the use of any of these terms in the description and / or claims should not be construed to mean that the use of such terms is in any way intended to limit the scope of the application as claimed.

[0042] In the present application, the word "exemplary" or "for example" is used to mean an example, an illustration, or another non-limiting instance exemplifying the concept being described. In no way is the word "exemplary" or "for example" to be construed as indicating a preference or a favorable or advantageous property with respect to other embodiments or designs. In other words, use of the word "exemplary" or "for example" is meant to present an example, a non-limiting instance, or another non-limiting instance exemplifying the concept being described.

[0043] In the related art, the membrane assembly is directly arranged in the inner cavity of the reactor, which to some extent helps the microorganisms to degrade the sewage, but at the same time greatly increases the risk of sludge blocking the membrane surface and excessive growth of microorganisms. In addition, sludge blocking the membrane surface and microorganism growth also affect the service life of the membrane, which may cause the membrane material to age or be damaged in advance, thereby further increasing the operation cost and maintenance difficulty of the MBR system.

[0044] Based on this, the present application provides a wastewater treatment device to solve the above technical problems.

[0045] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0046] Please refer toFigs. 1 to 4 The wastewater treatment device provided by the embodiment of the present application comprises a reactor 100, a filter 200 and a liquid outlet pipe 300.

[0047] The reactor 100 is provided with a reaction cavity, and the reaction cavity is provided with a water inlet 110 and an exhaust port 120. The reaction cavity is used for arranging activated sludge for reacting with wastewater. The filter 200 is provided with a filter cavity, and the filter cavity is provided with a membrane assembly 220. The membrane assembly 220 is used for filtering reaction liquid after the wastewater reacts with the activated sludge. The reaction cavity is provided with a liquid outlet 130, and the filter cavity is provided with a liquid inlet 210. The liquid outlet pipe 300 is connected between the liquid outlet 130 and the liquid inlet 210.

[0048] The reaction cavity is used for containing activated sludge for reacting with wastewater. The activated sludge has strong biodegradation capacity and can effectively decompose organic pollutants in the wastewater. The water inlet 110 of the reaction cavity is used for introducing wastewater to be treated, and the exhaust port 120 is used for releasing gas generated in the reaction process, so as to ensure that the pressure in the reaction cavity is stable and prevent the reaction efficiency from being affected due to gas accumulation.

[0049] The liquid outlet pipe 300 is connected between the reaction cavity and the filter cavity. The reaction liquid in the reaction cavity can enter the filter cavity through the liquid outlet pipe 300, so as to be subjected to subsequent filtration treatment. The membrane assembly 220 is a key component in wastewater treatment, which can filter the reaction liquid after the wastewater reacts with the activated sludge, remove impurities such as suspended solids and macromolecular organic matter in the reaction liquid, and ensure that the effluent water is clean.

[0050] In the embodiment of the present application, since the reactor 100 and the filter 200 are independently arranged, the membrane assembly 220 is arranged in the filter cavity of the filter 200 and is isolated from the reaction cavity. Most of the sludge and microorganisms are limited in the reactor 100, so that the contact between the sludge and microorganisms and the membrane assembly 220 is effectively reduced. Therefore, the situation that the surface of the membrane assembly 220 is easily blocked by the sludge and the microorganisms are attached and grow is effectively improved. This is conducive to maintaining good filtration performance of the membrane assembly 220, thereby reducing the influence of wastewater treatment efficiency and maintaining good working performance of the membrane bioreactor.

[0051] In an alternative embodiment, the wastewater treatment device further comprises an aeration assembly 400, which comprises an aeration pipe 410 and a waterproof air-permeable membrane. One end of the aeration pipe 410 is provided with an aeration section, and the other end of the aeration pipe 410 is used for being connected with a gas source. The aeration section is provided with a plurality of aeration ports 411, and the aeration ports 411 are arranged towards the membrane assembly 220. The waterproof air-permeable membrane is arranged at the aeration ports 411.

[0052] The aeration assembly 400 releases bubbles through the aeration port 411, which scour the surface of the membrane assembly 220, helping to remove sludge and microorganisms on the surface of the membrane assembly 220, thereby helping to maintain the cleanliness of the membrane assembly 220. This reduces the frequency of downtime cleaning due to membrane fouling, prolongs the service life of the filter membrane, and enhances the stability and reliability of the device.

[0053] It can be understood that the waterproof breathable membrane allows gas to pass through while preventing liquid from passing through. Specifically, the distance between gas molecules is large, and during the diffusion process, gas molecules can pass through the air holes of the waterproof breathable membrane. The distance between liquid molecules is smaller than the distance of the air holes, and under the action of surface tension, the liquid molecules cannot pass through the waterproof breathable membrane, i.e., the waterproof effect is achieved.

[0054] Exemplarily, the aeration pipe 410 is in communication with the exhaust port 120 of the reaction chamber, so that the gas generated in the reactor 100 is utilized, which is conducive to simplifying the structure of the device and reducing the cost of aeration.

[0055] In an alternative embodiment, the membrane assembly 220 includes at least two membrane boxes 221, the membrane box 221 is a filter membrane, and the membrane box 221 is provided with a water outlet 222; wherein the aeration section is arranged at the bottom of the membrane box 221, and the liquid inlet 210 is arranged at the top of the reaction chamber.

[0056] The membrane box 221 is enclosed by a filter membrane, which has good filtering effect and durability. Each membrane box 221 is provided with a water outlet 222 for discharging clean water filtered. When filtering, the reaction liquid introduced into the filter chamber is filtered by the membrane box 221 and then enters the membrane box 221, and the filtered clean water is discharged from the water outlet 222.

[0057] The top of the reaction chamber is provided with a liquid inlet 210 for introducing the reaction liquid treated by the reactor 100 into the filter 200. The position of the liquid inlet 210 is adjusted so that the reaction liquid can be uniformly distributed above the membrane box 221 to form a stable liquid surface.

[0058] When gas scouring and reaction liquid introduction are performed simultaneously, since the aeration section is arranged at the bottom of the membrane box 221, the scouring air released by the aeration pipe 410 forms an upward airflow at the bottom of the membrane box 221, which drives the liquid in the membrane box 221 to flow upward. At the same time, due to the limitation of the inner wall of the membrane box 221, the liquid outside the membrane box 221 forms a downward flow. This upward flow and downward flow form a rotational flow inside and outside the membrane box 221, which not only agitates the sludge layer, but also effectively removes the sludge and impurities on the surface of the membrane, thereby improving the self-cleaning ability of the membrane assembly 220.

[0059] In an alternative embodiment, the two adjacent membrane boxes 221 are spaced apart, the spacing between the two adjacent membrane box 221 housings is 450-750 mm, and the spacing between the membrane box 221 housing and the filter cavity wall is 400-700 mm.

[0060] The two adjacent membrane boxes 221 are spaced apart, that is, a certain spacing is maintained between the two adjacent membrane boxes 221, which is beneficial to the uniform distribution of bubbles during aeration and can also ensure that each membrane box 221 can obtain sufficient scrubbing air, thereby improving the self-cleaning effect of the membrane module 220. The spacing between the two adjacent membrane box 221 housings is controlled within the range of 450-750 mm, and the spacing between the membrane box 221 housing and the filter cavity wall is controlled within the range of 400-700 mm. On the one hand, this ensures the effective diffusion of bubbles between the membrane boxes 221 and avoids the excessive accumulation of bubbles in a certain membrane box 221. On the other hand, this ensures the unobstructed flow channel between the membrane boxes 221, which is beneficial to the formation of a stable rotational flow and further improves the self-cleaning ability of the membrane module 220.

[0061] In an alternative embodiment, the membrane module 220 further comprises a support 240, the support 240 is arranged at the bottom of the filter cavity, the membrane box 221 is arranged on the upper side of the support 240, and the membrane box 221 and the support 240 are detachably connected.

[0062] The support 240 is arranged at the bottom of the filter cavity and is used to support the membrane box 221 so that the membrane box 221 is at a certain distance from the bottom of the filter cavity, effectively avoiding the accumulation of filtered sludge at the bottom of the filter cavity and thereby contaminating the membrane box 221.

[0063] The membrane box 221 and the support 240 are detachably connected, such as bolt connection, buckle connection, etc., which is convenient for the replacement and maintenance of the membrane box 221. This design allows the membrane box 221 to be quickly removed from the support 240 when the membrane module 220 needs to be cleaned or replaced, without the need to disassemble the entire filter 200, thereby greatly improving the maintenance efficiency.

[0064] In an alternative embodiment, the filter membrane is a flat sheet membrane, a hollow fiber membrane, a tubular membrane, or a disc membrane.

[0065] Flat sheet membranes are usually made of high molecular materials such as polysulfone, polyacrylonitrile, polyvinyl chloride or cellulose acetate, etc. They have the characteristics of stable structure, easy cleaning and replacement. Hollow fiber membranes, as the filter medium, form micro-channels inside the membrane filaments, and the outside is the filter layer, which has a very high specific surface area and can effectively improve the filtration efficiency. The inside of the tubular membrane is smooth, not easy to block, and easy to backwash and chemical cleaning, suitable for systems that need to run stably for a long time. Disc membrane, also known as disc membrane or disc filter, is a structure composed of a series of parallel discs with filter holes stacked together, and narrow filtration channels are formed between adjacent discs. It has high solid-liquid separation capacity and is particularly suitable for treating liquids containing a large amount of suspended solids, such as industrial wastewater treatment and clarification process in food processing.

[0066] It can be understood that the selection of the filter membrane can be determined according to the type of wastewater to be treated.

[0067] In an alternative embodiment, the pore size of the filter membrane is 0.01-0.25 μm.

[0068] When the pore size of the filter membrane is set to this range, it can effectively trap small particles, bacteria, viruses and part of the dissolved organic matter in water, while allowing water molecules and other small molecule solutes to pass through, thereby improving the cleanliness of the filtered water.

[0069] By precisely controlling the pore size of the filter membrane, the filtration efficiency and service life of the membrane module 220 can also be optimized. Smaller pore size can provide higher filtration accuracy, but it can also lead to higher pressure drop and faster membrane fouling rate. Therefore, in practical applications, the most suitable pore size range needs to be selected comprehensively considering factors such as water quality, target pollutants and economic cost.

[0070] In an alternative embodiment, the aeration assembly 400 further comprises a membrane pressure gauge 420, a control valve 450 and a controller 440.

[0071] The membrane pressure gauge 420 is arranged on the box body of the membrane box 221, and is used to measure the surface pressure of the filter membrane; the control valve 450 is arranged on the aeration pipe 410, and is used to control the gas flow of the aeration pipe 410; the controller 440 is arranged on the body of the filter 200, and the membrane pressure gauge 420 and the control valve 450 are connected with the controller 440.

[0072] The membrane pressure gauge 420 can detect potential filter membrane blockage problems in time by continuously monitoring the change of the membrane pressure, so that appropriate cleaning or maintenance measures can be taken to prolong the service life of the membrane.

[0073] The control valve 450 adjusts the flow of gas into the membrane tank 221, thereby controlling the impact force of the scouring bubbles on the surface of the filtration membrane. The controller 440 is responsible for receiving feedback data from the membrane pressure gauge 420 and intelligently adjusting the opening of the control valve 450 according to a pre-set logical algorithm. Optionally, the controller 440 is a PLC controller 440.

[0074] By way of example, the controller 440 is pre-set with a safety threshold for the membrane pressure on the surface of the filtration membrane. When the membrane pressure gauge 420 monitors that the membrane pressure exceeds this threshold, the controller 440 adjusts the opening of the control valve 450 according to the trend of the membrane pressure, so as to maintain an appropriate amount of aeration to scour and scrub the filtration membrane, thereby ensuring the stable operation of the wastewater treatment system.

[0075] In an alternative embodiment, the wastewater treatment device further comprises a backflow pipe 500, the filtration chamber is provided with a sludge outlet 230, the reaction chamber is provided with a sludge return port 140, and the backflow pipe 500 is connected between the sludge outlet 230 and the sludge return port 140.

[0076] The backflow pipe 500 connects the sludge outlet 230 of the filtration chamber and the sludge return port 140 of the reaction chamber, thereby realizing the backflow of sludge from the filtration chamber to the reaction chamber. Through the backflow of sludge, the accumulated sludge in the filtration chamber can be re-introduced into the reaction chamber, which helps to improve the concentration of microorganisms in the reactor 100, thereby improving the treatment effect of the anaerobic reactor 100 on pollutants, and thus improving the degradation efficiency of sludge and the purification effect of wastewater.

[0077] By way of example, the sludge outlet 230 is arranged at the bottom of the filtration chamber, the sludge return port 140 is arranged at the bottom of the reaction chamber, and a backflow pump is arranged on the backflow pipe 500, thereby improving the backflow speed of sludge and preventing the sludge return pipe from being blocked.

[0078] In an alternative embodiment, the wastewater treatment device further comprises a water inlet assembly 600, the water inlet assembly 600 comprising a stirring barrel 610, a water inlet pipe 620, and a water inlet pump 630, one end of the water inlet pipe 620 being connected to the stirring barrel 610, and the other end being connected to the water inlet port 110; the water inlet pump 630 being arranged on the water inlet pipe 620 and being used to introduce wastewater in the stirring barrel 610 into the reaction chamber.

[0079] The stirring barrel 610 serves as a pretreatment device for wastewater before entering the reaction chamber, and is used to mix and homogenize the wastewater. Through the stirring device (such as a stirrer or an impeller) in the stirring barrel 610, the suspended matter and dissolved matter in the wastewater can be uniformly dispersed, thereby preventing sedimentation and stratification, and providing homogenized wastewater for subsequent treatment.

[0080] The water inlet pipe 620 serves as a pipeline connecting the stirring barrel 610 and the reaction chamber, and is used to transport pretreated wastewater into the reaction chamber. The water inlet pump 630 is arranged on the water inlet pipe 620 and is used to provide power required for wastewater transportation.

[0081] The embodiment of the present application can help to improve the efficiency and effect of wastewater treatment by pre-treating wastewater through the water inlet assembly 600.

[0082] Exemplarily, the wastewater treatment device of the embodiment of the present application can be applied to treat wastewater containing methylamine. The reactor uses anaerobic activated sludge to degrade methylamine in wastewater. The anaerobic activated sludge can biodegrade methylamine in wastewater and produce biogas under the action of anaerobic microorganisms in an anaerobic environment. The biogas mainly contains methane and a small amount of carbon dioxide.

[0083] The wastewater treatment device based on the embodiment of the present application includes the following steps:

[0084] First, the wastewater containing methylamine is stirred uniformly by the stirring barrel 610, then is introduced into the reaction cavity of the reactor 100 through the water inlet pipe 620, and the reaction cavity is in an anaerobic environment. Then, the wastewater is fully mixed with the pre-installed anaerobic activated sludge in the reaction cavity, and the mixed wastewater and anaerobic activated sludge perform anaerobic digestion reaction in the reaction cavity. Microorganisms use organic matter in wastewater as carbon source and energy source to perform anaerobic digestion reaction and produce methane. The methane is discharged through the exhaust port 120 and is collected for subsequent reuse. The microorganisms are methanogens.

[0085] Then, after a certain time of anaerobic digestion reaction, the reaction liquid after the reaction of the wastewater and the anaerobic activated sludge is introduced into the filter cavity of the filter 200 through the liquid outlet pipe 300, and is filtered by the membrane assembly 220. The filtered water after the reaction liquid is filtered is discharged through the water outlet 222 of the membrane box 221 for subsequent treatment or discharge. The filter membrane on the membrane box 221 can intercept microorganisms and larger particulate matters, so that only purified water can pass through the membrane pore size, preventing the loss of microorganisms and maintaining a high biomass and activity.

[0086] At the same time, the residual anaerobic activated sludge intercepted in the filter cavity can be returned to the reaction cavity from the filter through the sludge return pipe, which helps to improve the concentration of microorganisms in the reactor 100 and further improve the treatment effect of the reactor 100 on pollutants.

[0087] In the above process, one end of the aeration pipe 410 connected to the gas source can be connected to the exhaust port 120, so that the biogas produced by degrading wastewater in the reactor 100 is introduced into the reactor 100 through the aeration pipe 410. Specifically, the biogas accumulated in the headspace of the reactor 100 can be pumped to the bottom of the reactor 100, and uniformly aerated under the action of the gas distribution passage. In this way, on the one hand, it plays a role in stirring the sludge mixture and flushing the membrane surface, delaying the formation of membrane surface pollution, and on the other hand, the nitrogen gas is introduced into the filter 200 for aeration, which is conducive to maintaining the anaerobic environment of the reactor 100 and the filter 200, so as to ensure the degradation of microorganisms to wastewater containing methylamine.

[0088] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0089] It is to be understood that the application is not limited to the precise construction herein disclosed and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

Claims

1. A wastewater treatment device, characterized in that, include: A reactor (100) is provided with a reaction chamber, which is provided with an inlet (110) and an outlet (120). The reaction chamber is used to set activated sludge that reacts with wastewater. A filter (200) has a filtration chamber, and the filtration chamber is provided with a membrane module (220), which is used to filter the reaction liquid after the wastewater reacts with the activated sludge; The reaction chamber is provided with an outlet (130), the filter chamber is provided with an inlet (210), and the outlet pipe (300) is connected between the outlet (130) and the inlet (210).

2. The wastewater treatment device according to claim 1, characterized in that, It also includes an aeration assembly (400), said aeration assembly (400) comprising: An aeration pipe (410) is provided at one end with an aeration section and at the other end with connection to an air source. The aeration section is provided with a plurality of aeration ports (411) which are arranged toward the membrane module (220). A waterproof and breathable membrane is provided at the aeration port (411).

3. The wastewater treatment device according to claim 2, characterized in that, The membrane module (220) includes at least two membrane boxes (221), the body of the membrane box (221) is a filter membrane, and the membrane box (221) is provided with an outlet (222); wherein, the aeration section is located at the bottom of the membrane box (221), and the liquid inlet (210) is located at the top of the reaction chamber.

4. The wastewater treatment device according to claim 3, characterized in that, The membrane boxes (221) are arranged at intervals, the distance between the two membrane boxes (221) is 450-750mm, and the distance between the membrane box (221) and the filter chamber wall is 400-700mm.

5. The wastewater treatment device according to claim 3, characterized in that, The membrane assembly (220) further includes a support (240), which is located at the bottom of the filter chamber. The membrane box (221) is located on the upper side of the support (240), and the membrane box (221) is detachably connected to the support (240).

6. The wastewater treatment device according to claim 3, characterized in that, The filter membrane is a flat sheet membrane, a hollow fiber membrane, a tubular membrane, or a disc membrane.

7. The wastewater treatment apparatus according to claim 3, characterized in that, The pore size of the filter membrane is 0.01 to 0.25 μm.

8. The wastewater treatment device according to claim 3, characterized in that, The aeration assembly (400) also includes: A membrane pressure gauge (420) is installed on the membrane box (221) and is used to measure the surface pressure of the filter membrane. A control valve (450) is provided on the aeration pipe (410) and is used to control the gas flow rate of the aeration pipe (410). The controller (440) is located on the body of the filter (200), and the membrane pressure gauge (420) and the control valve (450) are both connected to the controller (440).

9. The wastewater treatment apparatus according to any one of claims 1 to 8, characterized in that, It also includes a return pipe (500), the filter chamber is provided with a mud outlet (230), the reaction chamber is provided with a mud return port (140), and the return pipe (500) is connected between the mud outlet (230) and the mud return port (140).

10. The wastewater treatment apparatus according to claim 9, characterized in that, It also includes a water inlet assembly (600), the water inlet assembly (600) comprising: Mixing tank (610); A water inlet pipe (620) is provided, one end of which is connected to the mixing tank (610) and the other end of which is connected to the water inlet (110). A water inlet pump (630) is installed on the water inlet pipe (620) and is used to pump wastewater from the mixing tank (610) into the reaction chamber.

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