MABR sewage treatment device and sewage treatment equipment

Abstract

The invention relates to an MABR sewage treatment device, which comprises: a box body provided with a sewage treatment cavity; the MABR membrane assembly is arranged in the sewage treatment cavity; the MABR sewage treatment device further comprises a gas circulation assembly which is communicated with the sewage treatment cavity so that sewage in the sewage treatment cavity can be discharged out of the sewage treatment cavity through the gas circulation assembly; wherein the gas circulation assembly is provided with a circulation water channel, and the height of the communication position of the circulation water channel and the sewage treatment cavity in the first direction is larger than one half of the maximum height of the MABR membrane assembly; one end of the oxygen supply pipe is communicated with the MABR membrane assembly, and the other end of the oxygen supply pipe is communicated with an external air source; wherein in the first direction, the height of the position where the oxygen supply pipe is communicated with the MABR membrane assembly is larger than or equal to the maximum height of the MABR membrane assembly; the scrubbing assembly is arranged on the lower side of the MABR membrane assembly in the first direction. According to the technical scheme, the nitrogen and phosphorus removal efficiency is improved, the energy consumption of equipment is reduced, and meanwhile, the size of the MABR sewage treatment device is reduced, so that the tank capacity of the MABR sewage treatment device in the sewage treatment equipment is smaller.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a MABR sewage treatment device and sewage treatment equipment. Background Art

[0002] Membrane Aerated Biofilm Reactor (MABR) is a treatment process that uses an oxygen-permeable membrane as a carrier and achieves the degradation of pollutants in sewage through a biofilm system attached and grown on the surface of the carrier.

[0003] The biofilm method is a method of treating organic wastewater by using microorganisms attached and grown on the surface of certain solid objects (i.e., biofilms) under conditions of sufficient oxygen supply. Biofilms are an ecosystem composed of highly dense aerobic bacteria, anaerobic bacteria, facultative bacteria, fungi, protozoa, and algae, and the solid medium to which they are attached is called filter material or carrier. From the filter material to the outside, the biofilm can be divided into an anaerobic layer, an aerobic layer, an attached water layer, and a moving water layer. The principle of the biofilm method is that the biofilm first absorbs organic matter in the attached water layer, which is then decomposed by aerobic bacteria in the aerobic layer, and then enters the anaerobic layer for anaerobically decomposing. The flowing water layer then washes away the aged biofilm to grow a new biofilm, and this cycle is repeated to achieve the purpose of purifying wastewater.

[0004] At present, most membrane aerated biofilm reactors use traditional biofilm treatment technology with fillers. For example, Chinese patent document: CN215288143U discloses an internal aerated biological filler and a sewage treatment device. The internal aerated biological filler includes a filler unit, and the filler unit includes a central body, a biofilm structure and at least one aeration tube. The central body is formed with an inner cavity, and the aeration tube is inserted in the central body. The aeration tube is provided with a first air hole for aeration, and the central body is provided with a second air hole for aeration. The biofilm structure is arranged on the outer surface of the central body, and the biofilm structure is used to grow a biofilm.

[0005] However, the traditional biofilm treatment technology with fillers has low efficiency in nitrogen and phosphorus removal, high energy consumption, and large footprint, and will occupy a large volume of tank capacity in a large amount of sewage treatment equipment.

[0006] Contents of this application

[0007] The embodiments of the present application provide a MABR sewage treatment device and sewage treatment equipment, which have a smaller volume and reduce energy consumption, so as to at least partially solve the above-mentioned technical problems.

[0008] In order to achieve the above object, according to the first aspect of the present application, a MABR sewage treatment device is provided, comprising:

[0009] A box body, wherein the box body is provided with a sewage treatment chamber;

[0010] A MABR membrane assembly is arranged in the sewage treatment chamber;

[0011] The MABR sewage treatment plant also includes:

[0012] A gas circulation component is communicated with the sewage treatment chamber so that the sewage in the sewage treatment chamber can be discharged from the sewage treatment chamber through the gas circulation component;

[0013] Wherein, the gas circulation assembly is provided with a circulation water channel, and the height of the connection point between the circulation water channel and the sewage treatment chamber along the first direction is greater than one half of the maximum height of the MABR membrane assembly;

[0014] An oxygen supply pipe, one end of which is connected to the MABR membrane assembly, and the other end of which is connected to an external gas source;

[0015] Wherein, in the first direction, the height of the connection point between the oxygen supply pipe and the MABR membrane assembly is greater than or equal to the maximum height of the MABR membrane assembly;

[0016] The scrubbing assembly is arranged on the lower side of the MABR membrane assembly along the first direction.

[0017] Optionally,

[0018] The gas circulation component is arranged on the circumferential side of the box body.

[0019] Optionally,

[0020] The circulating water channel is provided with a water inlet and a water outlet. The water inlet is configured to flow the sewage into the sewage treatment chamber, and the water outlet is configured to flow the sewage out of the sewage treatment chamber.

[0021] Optionally,

[0022] The height of the water inlet of the circulating waterway in the first direction is greater than or equal to the maximum height of the MABR membrane assembly in the first direction, and the water inlet is flush with the water outlet.

[0023] Optionally,

[0024] The gas circulation component also includes: a circulating air pipe, one end of which is connected to the circulating waterway, and the other end is used to connect to an external air source, wherein the distance between the connection point between the circulating air pipe and the circulating waterway and the water inlet is greater than the distance between the circulating air pipe and the water outlet.

[0025] Optionally,

[0026] The gas circulation assembly at least comprises: a first sub-circulation assembly, arranged on a first side of the box;

[0027] The second sub-circulation component is arranged on a second side opposite to the first side of the box.

[0028] Optionally,

[0029] The MABR sewage treatment plant also includes:

[0030] A cofferdam plate is arranged on the top of the box body and between the first sub-circulation component and the second sub-circulation component.

[0031] Optionally,

[0032] The cofferdam plate is provided with an overflow guide groove configured to guide sewage into the water inlet.

[0033] Optionally,

[0034] The scrubbing assembly comprises: a scrubbing water pipe, arranged along the first direction and at the lower side of the mold assembly;

[0035] A scrubbing air pipe has one end connected to the scrubbing pipe and the other end used for connecting to an external air source.

[0036] Optionally,

[0037] The gas flow in the scrubbing air pipe is greater than the gas flow in the circulating air pipe, and the gas flow in the circulating air pipe is greater than the gas flow in the oxygen supply pipe.

[0038] Optionally,

[0039] The box body is provided with one or more circulation chambers, and the circulation air pipe is at least partially arranged in the circulation chamber;

[0040] The box body is provided with one or more oxygen supply chambers, and the oxygen supply pipe is at least partially arranged in the oxygen supply chamber;

[0041] The box body is provided with one or more scrubbing chambers, and the scrubbing air pipe is arranged in the scrubbing chambers.

[0042] According to a second aspect of the present application, there is provided a sewage treatment device, comprising:

[0043] A MABR sewage treatment device as described in the first aspect of the present application.

[0044] In the MABR sewage treatment device and sewage treatment equipment of the embodiments of the present application, the above-mentioned technical scheme is used to improve the efficiency of nitrogen removal and phosphorus removal, reduce the energy consumption of the equipment, and at the same time reduce the volume of the MABR sewage treatment device, so that its tank capacity in the sewage treatment equipment is smaller.

[0045] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0047] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0048] Figure 1 is a schematic diagram of the overall structure of a MABR sewage treatment device provided in an exemplary embodiment of the present disclosure;

[0049] Figure 2 is a schematic diagram of the overall structure of a MABR sewage treatment device from another perspective provided in an exemplary embodiment of the present disclosure;

[0050] Figure 3 is a cross-sectional schematic diagram of a MABR sewage treatment device provided in an exemplary embodiment of the present disclosure;

[0051] Figure 4 is a schematic diagram of the left side structure of a MABR sewage treatment device provided in an exemplary embodiment of the present disclosure;

[0052] Figure 5 is a schematic diagram of the right side structure of a MABR sewage treatment device provided in an exemplary embodiment of the present disclosure;

[0053] Figure 6 is a schematic diagram of a top view of a MABR sewage treatment device provided in an exemplary embodiment of the present disclosure;

[0054] Figure 7 is a bottom-up structural schematic diagram of a MABR sewage treatment device provided in an exemplary embodiment of the present disclosure;

[0055] Figure 8 is a schematic cross-sectional structural diagram of a MABR sewage treatment device provided in an exemplary embodiment of the present disclosure from another perspective;

[0056] Description of reference numerals:

[0057] 100. MABR sewage treatment plant;

[0058] 110, box body; 111, sewage treatment chamber; 112, circulation chamber; 113, oxygen supply chamber; 114, scrubbing chamber;

[0059] 120. MABR membrane assembly; 121. Installation beam; 122. Membrane wire installation piece; 123. MABR biofilm wire;

[0060] 130, gas circulation component; 131, circulating water channel; 131a, water inlet; 131b, water outlet; 132, circulating gas pipe; 130a, first sub-circulation component; 130b, second sub-circulation component;

[0061] 141. Oxygen supply tube;

[0062] 150, cofferdam plate; 151, overflow channel;

[0063] 160, scrubbing assembly; 161, scrubbing water pipe; 1611, scrubbing hole; 162, scrubbing air pipe;

[0064] D1, first direction; DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0066] According to the first aspect of the present application, referring to Figures 1 to 7 The present application provides a MABR sewage treatment device 100 , including: a box body 110 , a MABR membrane assembly 120 , a gas circulation assembly 130 , an oxygen supply pipe 141 and a scrubbing assembly 160 .

[0067] Reference Figures 1 to 3 As shown, in some embodiments of the present application, the box body 110 forms a sewage treatment chamber 111, and the box body 110 structure can be a rectangular parallelepiped, a prism or a cylinder, etc., and the present application does not limit it. For the convenience of description, the box body 110 structure of the present application is described as a rectangular parallelepiped.

[0068] The MABR membrane assembly 120 is arranged in the sewage treatment chamber 111. The MABR membrane assembly 120 includes two groups of equally spaced mounting beams 121, membrane wire mounting parts 122 and MABR biofilm wires 123 near the top and bottom of the housing 110. Each mounting beam 121 is evenly spaced along its length, and a plurality of membrane wire mounting parts 122 are evenly spaced. A MABR biofilm wire 123 is installed between the upper and lower corresponding membrane wire mounting parts 122. When sewage is treated, the sewage flows into the sewage treatment chamber 111 from the bottom of the housing 110, and after being treated by the MABR biofilm wires 123 in the MABR membrane assembly 120, it flows out of the sewage treatment chamber 111 through the connection between the sewage treatment chamber 111 and the gas circulation assembly 130.

[0069] In this embodiment, the MABR biofilm filament 123 is a polydimethylsiloxane hollow fiber membrane, also known as a silica gel hollow fiber membrane. By using the polydimethylsiloxane hollow fiber membrane as a medium, it can provide oxygen for aerobic bacteria treatment and provide a carrier for the growth of the biofilm. The biofilm directly receives oxygen from the surface of its growth carrier and can treat the two main pollutants in municipal sewage - carbon and nitrogen.

[0070] Oxygen molecules diffuse into the biofilm through the polydimethylsiloxane hollow fiber membrane, which can be simply defined as microporous oxygen transfer. The hollow fiber membrane has a strong structure and can withstand a transmembrane pressure of up to 500mbar. The hollow fiber membrane is designed for the application of membrane aerated biofilm reactor (MABR) with high concentration of suspended solids. It has a thin and dense wall, which surrounds the supporting membrane core to ensure sufficient membrane fiber strength. The biofilm grows outside the membrane core, and oxygen selectively penetrates the MABR membrane. The oxygen transfer efficiency is 4 times higher than that of traditional aeration technology, and the unit energy consumption is greatly reduced.

[0071] Reference Figure 4 and Figure 5 As shown, the gas circulation component 130 is connected to the sewage treatment chamber 111, so that the treated sewage in the sewage treatment chamber 111 flows out of the sewage treatment chamber 111 with the help of the gas circulation component 130. Among them, the gas circulation component 130 is provided with a circulating waterway 131, and the circulating waterway 131 is connected to the sewage treatment chamber 111, that is, the gas circulation component 130 is connected to the sewage treatment chamber 111 of the box body 110, which is actually the connection between the sewage treatment chamber 111 and the circulating waterway 131. Along the first direction D1, the height of the connection point between the circulating waterway 131 and the sewage treatment chamber 111 is greater than half of the maximum height of the MABR membrane assembly 120 along the first direction D1. The first direction D1 mentioned here refers to the direction from the bottom of the box body 110 to the top of the box body 110.

[0072] One end of the oxygen supply pipe 141 is connected to the MABR membrane assembly 120, and the other end is connected to an external air source (not shown in the figure), and the external air source provides air to the MABR membrane assembly 120 through the oxygen supply pipe 141. Oxygen can pass through the oxygen supply pipe 141 to the MABR biofilm filaments 123 to supply oxygen to the biofilm growing on the surface of the MABR biofilm filaments 123. In order to meet the demand for oxygen supply to the biofilm growing on the surface of the MABR biofilm filaments 123, in the first direction D1, the height of the oxygen supply pipe 141 is greater than or equal to the maximum height of the MABR membrane assembly 120.

[0073] Refer to the figure Figure 6 and Figure 7 As shown, the scrubbing assembly 160 is arranged on the lower side of the MABR membrane assembly 120 along the first direction D1. The scrubbing assembly 160 includes a scrubbing air pipe 162 and a scrubbing water pipe 161. One end of the scrubbing air pipe 162 is connected to the scrubbing water pipe 161, and the other end of the scrubbing air pipe 162 is connected to an external air source (not shown in the figure). The scrubbing water pipe 161 is provided with a plurality of scrubbing holes 1611. The gas flowing out through the scrubbing holes 1611 impacts the sludge deposited at the bottom of the MABR sewage treatment device 100 on the one hand, preventing the sludge from being deposited at the bottom of the pool. On the other hand, the gas flowing out through the scrubbing holes 1611 will flush the biofilm on the surface of the MABR membrane assembly 120 to adjust the thickness of the biofilm and control the thickness of the biofilm within the optimal thickness range.

[0074] Since the area closest to the MABR biofilm filament 123 in the biofilm is an aerobic zone, and this area is filled with nitrifying bacteria, which produce nitrates by oxidizing ammonia, and the nitrates will diffuse into the liquid. The next area will be occupied by aerobic heterotrophic bacteria that consume COD (Chemical Oxygen Demand). When the biofilm is thick enough, an anoxic zone will eventually form at the biofilm-liquid interface. The nitrate diffused in the biofilm can utilize the COD diffused in the liquid and be denitrified into nitrogen. This synchronous nitrification / denitrification is unique to the MABR system, and the entire biofilm can be used for reaction, which in turn can achieve a higher load rate. Therefore, by scrubbing the biofilm, the thickness of the biofilm is controlled within the optimal thickness range, which can not only facilitate the good diffusion and removal of ammonia, but also utilize the suspended sludge at the bottom of the pool for denitrification.

[0075] Through the above technical solution, the thickness of the biofilm is always controlled within the optimal thickness range, so that the sewage of the MABR sewage treatment device 100 can be fully treated, thereby improving the sewage treatment efficiency and reducing energy consumption.

[0076] In some embodiments of the present application, the gas circulation component 130 is arranged on the circumferential side of the box body 110. Taking the rectangular box body 110 as an example, the rectangular box includes a bottom surface, a top surface, left and right side surfaces, and front and rear side surfaces. The gas circulation component 130 is arranged on the side of the box body 110. By arranging the gas circulation component 130 on the side of the box body 110, the overall volume of the MABR sewage treatment device 100 can be further reduced, thereby reducing the tank capacity of the MABR sewage treatment device 100 in the sewage treatment equipment.

[0077] In some embodiments of the present application, the circulating waterway 131 is provided with a water inlet 131a and a water outlet 131b, the water inlet 131a is configured to flow into the sewage in the sewage treatment chamber 111, and the water outlet 131b is configured to flow out of the sewage in the sewage treatment chamber 111. As a more specific solution, the height of the water inlet 131a of the circulating waterway 131 in the first direction D1 is greater than or equal to the maximum height of the MABR membrane assembly 120 in the first direction D1, and the water inlet 131a is flush with the height of the water outlet 131b. This design enables the sewage entering from the bottom of the housing 110 to be treated by the MABR membrane assembly 120 at all stages, thereby further improving the sewage treatment efficiency.

[0078] In some embodiments of the present application, the body circulation assembly further includes: a circulating air pipe 132, one end of the circulating air pipe 132 is connected to the circulating water channel 131, and the other end is used to connect to an external air source (not shown in the figure), wherein the distance between the connection between the circulating air pipe 132 and the circulating water channel 131 and the water inlet 131a is greater than the distance between the water outlet 131b. The circulating water channel 131 adopts a "U"-shaped water channel, and the connection between the circulating air pipe 132 and the circulating water channel 131 is set at the water outlet end of the circulating water channel 131.

[0079] In some embodiments of the present application, the gas circulation component 130 includes at least a first sub-circulation component 130a, which is arranged on the first side of the housing 110, and a second sub-circulation component 130b, which is arranged on the second side opposite to the first side of the housing 110. For example, when the first sub-circulation component 130a is arranged on the right side of the housing 110, the second sub-circulation component 130b is arranged on the left side of the housing 110. It should be noted here that, according to actual production needs, the MABR sewage treatment device 100 can be provided with one set of gas circulation components 130, or two sets of gas circulation components 130, in which case one set of circulation components is the first sub-circulation component 130a described in the present application, and the other set is the second sub-circulation component 130b described in the present application. Of course, depending on the structure of the housing 110, multiple sets of gas circulation components 130 can also be provided.

[0080] In some embodiments of the present application, the MABR sewage treatment device 100 further includes: a cofferdam plate 150, which is arranged at the top of the box 110 and between the first sub-circulation component 130a and the second sub-circulation component 130b. That is, the outlet 131b and the water inlet 131a of the circulating waterway 131 are arranged outside the space enclosed by the cofferdam plate 150, and at the same time, are located outside the box 110. The plate body of the cofferdam plate 150 is respectively provided with overflow guide grooves 151 corresponding to the water inlet 131a, and the overflow guide grooves 151 are respectively aligned and connected with the inlet of the circulating waterway 131, so that the liquid produced by the biochemical reaction in the box 110 can enter the overflow guide groove 151 from the top of the box 110, and then flow into the circulating waterway 131 from the overflow guide groove 151.

[0081] In some embodiments of the present application, the supply air pipe, the circulation air pipe 132 and the scrubbing air pipe 162 are all connected to an external air source, wherein the gas flow in the scrubbing air pipe 162 is greater than the gas flow in the circulation air pipe 132, and the gas flow in the circulation air pipe 132 is greater than the gas flow in the oxygen supply pipe 141. The gas flow rates in the above three air pipes are set according to the actual production of the MABR sewage treatment device 100. The setting of the gas flow rates in the above three air pipes ensures that the actual production needs are met. At the same time, the relatively accurate use of the gas source inevitably wastes energy. Of course, in some special working conditions in actual production, the flow rates in the above three air pipes can also be actually adjusted.

[0082] Reference Figure 8 As shown, in some embodiments of the present application, the box 110 further includes one or more circulation chambers 112, and the circulation air pipe 132 is at least partially arranged in the circulation chamber 112; the box 110 is provided with one or more oxygen supply chambers 113, and the oxygen supply pipe 141 is at least partially arranged in the oxygen supply chamber 113; the box 110 is provided with one or more scrubbing chambers 114, and the scrubbing air pipe 162 is arranged in the scrubbing chamber 114. By providing the circulation chamber 112, the oxygen supply chamber 113 and the scrubbing chamber 114, the box 110 can protect the circulation air pipe 132, the oxygen supply pipe 141 and the scrubbing air pipe 162 respectively on the one hand, and on the other hand, the circulation chamber 112, the oxygen supply chamber 113 and the scrubbing chamber 114 themselves can be used as part of the gas transmission channel.

[0083] The circulating air pipe 132 is connected to the circulating chamber 112, and the circulating chamber 112 is connected to an external air source, so that the circulating chamber 112 becomes a part of the transmitted gas flow; the oxygen supply pipe 141 is connected to the oxygen supply chamber 113, and the oxygen supply chamber 113 is connected to each MABR membrane assembly 120 to provide oxygen to the MABR biofilm filaments 123; the scrubbing air pipe 162 is connected to the scrubbing chamber 114, and the scrubbing chamber 114 is connected to multiple scrubbing water pipes 161 arranged at the bottom of the box body 110, and the scrubbing water pipes 161 are evenly distributed, and the length direction of the scrubbing water pipes 161 is perpendicular to the length direction of the scrubbing chamber 114, so as to achieve uniform gas flow supply for each scrubbing water pipe 161.

[0084] The circulation chamber 112, the oxygen supply chamber 113 and the scrubbing chamber 114 can be formed by the profile members at the edge of the box 110. The vertical profile along the first direction D1 of the box 110 can adopt a hollow profile structure, and the hollow profile structure serves as the circulation chamber 112. The hollow profile structure at the top of the box 110 forms the oxygen supply chamber 113, and the hollow profile structure at the bottom of the box 110 forms the scrubbing chamber 114.

[0085] The MABR sewage treatment device 100 of the present application, when treating sewage, introduces the wastewater treated in the anaerobic tank into the MABR reaction tank. The sewage in the MABR reaction tank flows from bottom to top and enters the sewage treatment chamber 111 from the bottom of the MABR sewage treatment device 100 box 110. At the same time, the oxygen supply pipe 141 supplies air to the center of the MABR biofilm of the MABR membrane assembly 120. Oxygen passes through the MABR biofilm filaments 123 to supply oxygen to the biofilm growing on the surface of the membrane filament. The matrix such as ammonia and organic matter in the sewage diffuses into the biofilm. The biofilm processes the ammonia, phosphorus nutrients and organic matter in the sewage. The water produced by the biochemical reaction overflows from the top of the box 110 through the overflow guide groove 151 into the water inlet 131a of the circulating waterway 131. Air is injected into the circulating waterway 131 through the circulating air pipe 132 to perform air lift on the liquid in the circulating waterway 131, so that the liquid in the circulating waterway 131 flows out from the outlet 131b thereof, flows back into the MABR reaction tank, and then enters the sewage treatment chamber 111 from the bottom of the MABR sewage treatment membrane box, and the cycle is repeated until the sewage is purified. The air lift cycle process can avoid the short-range phenomenon of some sewage, thereby improving the sewage purification rate;

[0086] As the biochemical reaction continues, when the biofilm on the surface of the MABR biofilm filaments 123 grows to a set thickness or the MABR sewage treatment device 100 runs for a set time, air is supplied to each scrubbing water pipe 161 through the scrubbing air pipe 162. The air discharged from the scrubbing water pipe 161 scrubs the biofilm on the surface of the MABR membrane assembly 120 to adjust the thickness of the biofilm while also stirring the sludge at the bottom of the MABR reaction tank.

[0087] The MABR sewage treatment device 100 of the present application improves the efficiency of nitrogen and phosphorus removal, reduces the energy consumption of the equipment, and also reduces the volume of the MABR sewage treatment device 100, so that its tank capacity in the sewage treatment equipment is smaller.

[0088] According to a second aspect of the present application, a sewage treatment device is provided, and the sewage treatment device includes the sewage treatment device 100 of the first aspect of the present application.

[0089] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0090] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0091] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0092] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A MABR sewage treatment device, comprising: The box body is provided with a sewage treatment chamber; A MABR membrane assembly is arranged in the sewage treatment chamber; It is characterized in that The MABR sewage treatment plant also includes: A gas circulation component is communicated with the sewage treatment chamber so that the sewage in the sewage treatment chamber can be discharged from the sewage treatment chamber through the gas circulation component; Wherein, the gas circulation assembly is provided with a circulation water channel, and the height of the connection point between the circulation water channel and the sewage treatment chamber along the first direction is greater than half of the maximum height of the MABR membrane assembly; An oxygen supply pipe, one end of which is connected to the MABR membrane assembly, and the other end of which is connected to an external gas source; Wherein, in the first direction, the height of the connection point between the oxygen supply pipe and the MABR membrane assembly is greater than or equal to the maximum height of the MABR membrane assembly; The scrubbing assembly is arranged on the lower side of the MABR membrane assembly along the first direction.

2. The MABR sewage treatment device according to claim 1, characterized in that: The gas circulation component is arranged on the circumferential side of the box body.

3. The MABR sewage treatment device according to claim 2, characterized in that: The circulating water channel is provided with a water inlet and a water outlet. The water inlet is configured to flow the sewage into the sewage treatment chamber, and the water outlet is configured to flow the sewage out of the sewage treatment chamber.

4. The MABR sewage treatment device according to claim 3, characterized in that: The height of the water inlet of the circulating waterway in the first direction is greater than or equal to the maximum height of the MABR membrane assembly in the first direction, and the water inlet is flush with the water outlet.

5. The MABR sewage treatment device according to claim 4, characterized in that: The gas circulation component also includes: a circulating air pipe, one end of which is connected to the circulating waterway, and the other end is used to connect to an external air source, wherein the distance between the connection point between the circulating air pipe and the circulating waterway and the water inlet is greater than the distance between the circulating air pipe and the water outlet.

6. The MABR sewage treatment device according to claim 5, characterized in that: The gas circulation assembly at least comprises: a first sub-circulation assembly, arranged on a first side of the box; The second sub-circulation component is arranged on a second side opposite to the first side of the box.

7. The MABR sewage treatment device according to claim 6, characterized in that: The MABR sewage treatment plant also includes: A cofferdam plate is arranged on the top of the box body and between the first sub-circulation component and the second sub-circulation component.

8. The MABR sewage treatment device according to claim 7, characterized in that: The cofferdam plate is provided with an overflow guide groove configured to guide sewage into the water inlet.

9. The MABR sewage treatment device according to claim 5, characterized in that: The scrubbing assembly comprises: a scrubbing water pipe, arranged along the first direction and at the lower side of the MABR membrane assembly; A scrubbing air pipe has one end connected to the scrubbing water pipe and the other end used for connecting to an external air source.

10. The MABR sewage treatment device according to claim 9, characterized in that: The gas flow in the scrubbing air pipe is greater than the gas flow in the circulating air pipe, and the gas flow in the circulating air pipe is greater than the gas flow in the oxygen supply pipe.

11. The MABR sewage treatment device according to claim 10, characterized in that: The box body is provided with one or more circulation chambers, and the circulation air pipe is at least partially arranged in the circulation chamber; The box body is provided with one or more oxygen supply chambers, and the oxygen supply pipe is at least partially arranged in the oxygen supply chamber; The box body is provided with one or more scrubbing chambers, and the scrubbing air pipe is arranged in the scrubbing chambers.

12. A sewage treatment equipment, characterized in that: include: The MABR sewage treatment device according to any one of claims 1 to 11.

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