Sewage treatment device containing membrane component

Abstract

The utility model relates to a sewage treatment device containing a membrane component, which comprises a cylindrical treater, the treater is of a sleeve layer structure and comprises an inner treatment part on the inner layer and an outer treatment part on the outer layer, and the inner treatment part comprises a first aerobic zone, a three-phase separation zone, an inclined plate sedimentation zone and a filler zone from bottom to top. The outer treatment part comprises an anaerobic zone, an anoxic zone and a second aerobic zone from bottom to top; a water inlet pipe is arranged on the outer side wall of the anaerobic zone, and at least one conveying pump is arranged on the inner side wall of the anaerobic zone and is used for conveying sewage in the anaerobic zone into the first aerobic zone; a return pipe is arranged above the three-phase separation zone, penetrates through the outer side wall of the inner treatment part and is used for returning the sewage to the second aerobic zone; a heavy ion microporous membrane assembly is arranged in the anoxic zone, and membrane tubes of the heavy ion microporous membrane assembly are transversely arranged and load microorganisms, so that synchronous nitrification and denitrification and short-cut nitrification and denitrification nitrogen removal are realized; the filler area comprises a ceramsite layer, a phosphorus removal layer and a river sand layer, and the ceramsite layer is loaded with denitrifying bacteria.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment device containing a membrane module. Background Art

[0002] With the development of sewage treatment technology and the improvement of people's living standards, China has also raised the discharge standards for sewage treatment to protect the good living environment. Denitrification and phosphorus removal have been the focus of domestic sewage treatment in recent years, and a variety of treatment methods have been developed, such as the activated sludge method, the sequencing batch reactor method, the moving bed biofilm reactor, etc., meeting the basic requirements of denitrification and phosphorus removal. However, with the increase in treatment costs and various energy consumption and consumption, it is difficult to further improve the effect of denitrification and phosphorus removal, and the denitrification and phosphorus removal technology has gradually reached a bottleneck stage. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is that the existing effective means for denitrification and phosphorus removal treatment devices are relatively single, generally using only one of activated sludge or biofilm alone, and it is difficult to further improve the treatment effect.

[0004] The utility model provides a sewage treatment device containing a membrane module, which includes a cylindrical processor. The processor is a sleeve structure, including an inner treatment part inside and an outer treatment part outside. The inner treatment part includes an aerobic zone I, a three-phase separation zone, an inclined plate sedimentation zone, and a packing zone from bottom to top. The outer treatment part includes an anaerobic zone, an anoxic zone, and an aerobic zone II from bottom to top.

[0005] A water inlet pipe is provided on the outer side wall of the anaerobic zone for inputting sewage; at least one delivery pump is provided on the inner side wall of the anaerobic zone for inputting the treated sewage in the anaerobic zone into the aerobic zone I; a reflux pipe is provided above the three-phase separation zone, and the reflux pipe passes through the outer side wall of the inner treatment part for refluxing the sewage to the aerobic zone II, so that the water body flows through the aerobic zone II, the anoxic zone, and the anaerobic zone in sequence for denitrification treatment.

[0006] A heavy ion microporous membrane module is provided in the anoxic zone. The membrane tubes of the heavy ion microporous membrane module are all arranged horizontally and are uniformly arranged along the circumferential direction of the anoxic zone. The membrane tubes include load membrane tubes and ventilation membrane tubes. Microorganisms are loaded on the load membrane tubes to realize synchronous nitrification and denitrification and short-cut nitrification and denitrification for nitrogen removal, improving the total nitrogen removal rate.

[0007] The packing zone includes a ceramsite layer, a phosphorus removal layer, and a river sand layer from bottom to top. The ceramsite layer is loaded with denitrifying bacteria, so that the water body passing through the packing layer is sequentially subjected to denitrification treatment, phosphorus removal treatment, and filtration treatment, making the effluent meet the standards.

[0008] Optionally, the inner treatment part is cylindrical, the outer treatment part is annular, and a partition is provided between the inner treatment part and the outer treatment part, which is the outer side wall of the inner treatment part or the inner side wall of the outer treatment part;

[0009] A number of delivery pumps are arranged along the circumferential direction of the inner treatment part on the partition. The delivery pumps penetrate the partition and are located in the middle and lower part of the partition to avoid sending too much anaerobic sludge into the first aerobic zone.

[0010] Further optionally, a sludge discharge pipe is provided on the outer side wall of the anaerobic zone. The height of the sludge discharge pipe is lower than that of the water inlet pipe, and the positions of the sludge discharge pipe, the water inlet pipe, and the delivery pumps are staggered from each other.

[0011] Optionally, a first separation net is provided between the anaerobic zone and the anoxic zone, and a second separation net is provided between the anoxic zone and the second aerobic zone to prevent the sludge in each zone from flowing into each other to a certain extent; a first aeration pipe is provided in the middle and lower part of the second aerobic zone to aerate the second aerobic zone and also meet the oxygen demand of the anoxic zone.

[0012] Optionally, the heavy ion microporous membrane module includes a number of membrane tubes and module frames at both ends of the membrane tubes. One end of the membrane tube points to the inner treatment part and is connected to the inner module frame, and the other end points to the outer side wall of the outer treatment part and is connected to the outer module frame;

[0013] The membrane tubes have the same length and are parallel to each other. The axial direction of the membrane tubes is horizontal, and a number of membrane tubes are evenly arranged along the circumferential direction of the anoxic zone.

[0014] Further optionally, both the inner module frame and the outer module frame are circular. The inner module frame is close to the partition, and the outer module frame is close to the outer side wall of the outer treatment part. The diameter of the inner module frame is smaller than that of the outer module frame; the inner module frame and the outer module frame are used to support the membrane tubes, and the interiors of the two module frames are hollow and are respectively connected to the corresponding ends of the ventilation membrane tubes.

[0015] Further optionally, the inner module frame of the ventilation membrane tube is connected to a gas supply device outside the processor through a gas supply pipe to supply oxygen to the membrane tubes, and the outer module frame is connected to the external atmospheric environment of the processor through an air outlet pipe to discharge the tail gas of the membrane tubes.

[0016] Further optionally, both ends of the loaded membrane tube are closed, that is, they are not connected to the interiors of the inner module frame and the outer module frame. The loaded membrane tube is loaded with short-cut nitrification functional bacteria, anaerobic ammonium oxidation functional bacteria, sulfur autotrophic denitrification functional bacteria, and iron ammonium oxidation functional bacteria to play a biochemical role.

[0017] Optionally, a second aeration pipe is provided at the bottom of the first aerobic zone, and the three-phase separation zone includes a number of three-phase separators.

[0018] Optionally, the inclined plate sedimentation area includes a plurality of inclined plates arranged side by side for separating mud and water, and the separated water body rises through the packing area; a water outlet pipe is provided at the top of the packing area to discharge the treated produced water.

[0019] Optionally, the packing area includes a carbon source layer, a ceramsite layer, a phosphorus removal layer, and a river sand layer from bottom to top. The carbon source layer is a polyhydroxyalkanoate layer. The ceramsite layer is formed by piling up ceramsite, and denitrifying bacteria are loaded on the ceramsite. The phosphorus removal layer includes a zero-valent iron layer below and a lanthanum chloride layer above. The river sand layer is formed by piling up river sand.

[0020] The sewage treatment device with an internal membrane module of the present utility model has the following beneficial effects:

[0021] (1) The setting of each treatment area in the inner layer and the outer layer of the processor, combined with the reflux pipe and the transfer pump, enables the sewage to flow through the anaerobic area, the first aerobic area, the three-phase separation area, the second aerobic area, the anoxic area, and the anaerobic area in sequence, and then return to the first aerobic area for multiple nitrification and denitrification treatments, forming a reflux between the inner layer and the outer layer; another part of the sewage in the three-phase separation area passes through the inclined plate sedimentation area and the packing area to form produced water.

[0022] (2) The outer layer is provided with a heavy ion microporous membrane module to achieve synchronous nitrification and denitrification and short-cut nitrification and denitrification for nitrogen removal, improving the overall utilization rate of the carbon source of the device and further improving the total nitrogen removal rate; the membrane tubes are placed horizontally, which can intercept a part of the activated sludge on the membrane surface and increase the sludge volume in the outer treatment part.

[0023] (3) The composite packing layer replaces the traditional filter packing layer, eliminating the need for a backwashing device. Denitrification treatment can be carried out again in the composite packing layer, followed by phosphorus removal and finally filtration treatment, improving the effluent quality. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the sewage treatment device with an internal membrane module;

[0025] Figure 2 It is a three-dimensional schematic diagram of the sewage treatment device with an internal membrane module;

[0026] Figure 3 It is a top view schematic diagram of the heavy ion microporous membrane module;

[0027] Figure 4 It is a schematic diagram of the packing area.

[0028] In the attached drawings, 1 is the inner treatment section, 2 is the outer treatment section, 3 is the first aerobic zone, 4 is the three-phase separation zone, 5 is the inclined plate sedimentation zone, 6 is the packing zone, 7 is the anaerobic zone, 8 is the anoxic zone, 9 is the second aerobic zone, 10 is the water inlet pipe, 11 is the transfer pump, 12 is the reflux pipe, 13 is the heavy ion microporous membrane module, 14 is the membrane tube, 15 is the partition board, 16 is the river sand layer, 17 is the inner component rack, 18 is the outer component rack, 19 is the carbon source layer, 20 is the ceramsite layer, 21 is the zero-valent iron layer, 22 is the lanthanum chloride layer, 23 is the first separation net, 24 is the second separation net, 25 is the first aeration pipe, and 26 is the support. Detailed implementation mode

[0029] This embodiment provides a sewage treatment device containing a membrane module. As Figures 1-4 shown, it includes a cylindrical processor. The processor is a nested structure, including the inner treatment section 1 of the inner layer and the outer treatment section 2 of the outer layer. The inner treatment section 1 includes, from bottom to top, the first aerobic zone 3, the three-phase separation zone 4, the inclined plate sedimentation zone 5, and the packing zone 6. The outer treatment section 2 includes, from bottom to top, the anaerobic zone 7, the anoxic zone 8, and the second aerobic zone 9.

[0030] The outer side wall of the anaerobic zone 7 is provided with a water inlet pipe 10 for inputting sewage. At least one transfer pump 11 is provided on the inner side wall of the anaerobic zone 7 for inputting the sewage treated in the anaerobic zone 7 into the first aerobic zone 3. A reflux pipe 12 is provided above the three-phase separation zone 4. The reflux pipe 12 passes through the outer side wall of the inner treatment section 1 for refluxing the sewage to the second aerobic zone 9, so that the water body flows through the second aerobic zone 9, the anoxic zone 8, and the anaerobic zone 7 in sequence for denitrification treatment.

[0031] A heavy ion microporous membrane module 13 is provided in the anoxic zone 8. The membrane tubes 14 of the heavy ion microporous membrane module 13 are all arranged horizontally and are evenly arranged along the circumferential direction of the anoxic zone 8. The membrane tubes include load membrane tubes and ventilation membrane tubes. Microorganisms are loaded on the load membrane tubes to achieve simultaneous nitrification and denitrification and short-cut nitrification and denitrification for nitrogen removal, improving the total nitrogen removal rate.

[0032] The packing zone 6 includes, from bottom to top, the ceramsite layer 20, the phosphorus removal layer, and the river sand layer 16. The ceramsite layer 20 is loaded with denitrifying bacteria, so that the water body passing through the packing layer is sequentially subjected to denitrification treatment, phosphorus removal treatment, and filtration treatment, making the effluent meet the standards.

[0033] The inner treatment section 1 is cylindrical, and the outer treatment section 2 is annular. A partition board 15 is provided between the inner treatment section 1 and the outer treatment section 2, which is the outer side wall of the inner treatment section 1 or the inner side wall of the outer treatment section 2.

[0034] A transfer pump 11 is arranged along the circumferential direction of the inner treatment section 1 on the partition board 15. The transfer pump 11 penetrates the partition board 15 and is located in the middle and lower part of the partition board 15 to prevent excessive anaerobic sludge from being sent into the first aerobic zone 3.

[0035] A sludge discharge pipe is provided on the outer side wall of the anaerobic zone 7. The height of the sludge discharge pipe is lower than that of the water inlet pipe 10. The positions of the sludge discharge pipe, the water inlet pipe 10, and the transfer pump 11 are staggered from each other.

[0036] A first partition net 23 is provided between the anaerobic zone 7 and the anoxic zone 8, and a second partition net 24 is provided between the anoxic zone 8 and the second aerobic zone 9, to avoid the sludge in each zone from flowing into each other to a certain extent; a first aeration pipe 25 is provided in the middle and lower part of the second aerobic zone 9 to aerate the second aerobic zone 9 and also meet the oxygen demand of the anoxic zone 8.

[0037] The heavy ion microporous membrane module 13 includes a plurality of membrane tubes and module frames at both ends of the membrane tubes. One end of the membrane tube points to the inner treatment part 1 and is connected to the inner module frame 17, and the other end points to the outer side wall of the outer treatment part 2 and is connected to the outer module frame 18;

[0038] The membrane tubes have the same length, the axial direction of the membrane tubes is horizontal, and a plurality of membrane tubes are uniformly arranged along the circumferential direction of the anoxic zone 8. The heavy ion microporous membrane module is provided with 5 layers of membrane tubes, and each layer is provided with 24 membrane tubes.

[0039] Both the inner module frame 17 and the outer module frame 18 are circular. The inner module frame 17 is close to the partition board 15, and the outer module frame 18 is close to the outer side wall of the outer treatment part 2. The diameter of the inner module frame 17 is smaller than that of the outer module frame 18; the inner module frame 17 and the outer module frame 18 are used to support the membrane tubes, and the interiors of the two module frames are hollow and are respectively connected to the corresponding ends of the ventilation membrane tubes.

[0040] The inner module frame 17 of the ventilation membrane tube is connected to a gas supply device outside the processor through a gas supply pipe to supply oxygen to the membrane tubes, and the outer module frame 18 is connected to the external atmospheric environment of the processor through an air outlet pipe to discharge the tail gas of the membrane tubes.

[0041] The membrane material of the membrane tube is a conventional heavy ion microporous membrane or heavy ion nuclear pore membrane in the art, that is, non-woven fabrics are respectively arranged on both sides of the PET membrane, and the three-layer combined membrane material.

[0042] Both ends of the loaded membrane tube are closed, that is, they are not connected to the inner module frame 17 and the outer module frame 18. The loaded membrane tube is loaded with short-cut nitrification functional bacteria, anaerobic ammonium oxidation functional bacteria, sulfur autotrophic denitrification functional bacteria, and iron ammonium oxidation functional bacteria to play a biochemical role;

[0043] Both ends of the ventilation membrane tube are connected to the inner module frame 17 and the outer module frame 18 to supply gas to the ventilation membrane tube. The ventilation membrane tube is not loaded with microorganisms and can intercept the sludge in the anoxic zone 8 to avoid a large amount of sludge from entering the anaerobic zone 7.

[0044] The number and length of the loading membrane tubes and the ventilation membrane tubes are adjusted according to the actual treatment requirements. The distribution form of the loading membrane tubes and the ventilation membrane tubes is also designed according to actual needs. It can be that the loading membrane tubes are at the lower part and the ventilation membrane tubes are at the upper part, or the loading membrane tubes are at the upper part and the ventilation membrane tubes are at the lower part, or the loading membrane tubes and the ventilation membrane tubes are arranged alternately. In this embodiment, the loading membrane tubes and the ventilation membrane tubes are arranged alternately, and the number of the loading membrane tubes and the ventilation membrane tubes is equal.

[0045] After the sewage enters the anoxic zone 8, it flows through the heavy ion microporous membrane module 13. Under the combined action of various microorganisms, simultaneous nitrification and denitrification and shortcut nitrification and denitrification nitrogen removal are realized, the overall utilization rate of carbon source in the system is improved, and further the total nitrogen removal rate is improved. At the same time, the ventilation membrane tubes can intercept the sludge in the anoxic zone 8, maintain the sludge volume in the anoxic zone 8, and appropriately compensate oxygen for the anoxic zone 8.

[0046] A second aeration pipe is provided at the bottom of the first aerobic zone 3 to aerate the first aerobic zone 3.

[0047] The three-phase separation zone 4 includes a number of three-phase separators, and the number of three-phase separators is evenly distributed in a matrix, covering the cross-section of the three-phase separation zone 4. The three-phase separators are connected to the inner wall of the partition by brackets 26 to support the three-phase separators.

[0048] The sewage treated in the first aerobic zone 3 passes through the three-phase separation zone 4. Most of the sludge returns to the first aerobic zone 3, and the sewage continues to rise. Part of the sewage enters the second aerobic zone 9 through the reflux pipe 12 under the stripping action of the separated gas and continues the biochemical treatment; the other part of the sewage enters the inclined plate sedimentation zone 5.

[0049] The inclined plate sedimentation zone 5 includes 20 inclined plates arranged side by side for mud-water separation. The separated water body rises through the packing zone 6; a water outlet pipe is provided at the top of the packing zone 6 to discharge the treated water.

[0050] The packing zone 6 includes a carbon source layer 19, a ceramsite layer 20, a phosphorus removal layer and a river sand layer 16 from bottom to top. The carbon source layer 19 is a polyhydroxyalkanoate layer. The ceramsite layer 20 is formed by piling up ceramsite, and denitrifying bacteria are loaded on the ceramsite. The phosphorus removal layer includes a zero-valent iron layer 21 below and a lanthanum chloride layer 22 above. The river sand layer 16 is formed by piling up river sand. The thicknesses of the carbon source layer, the ceramsite layer, the zero-valent iron layer, the lanthanum chloride layer and the river sand layer are 100 - 150 mm, 100 - 150 mm, 80 - 100 mm, 100 - 200 mm and 200 - 300 mm respectively. In this embodiment, the thicknesses of the above layers are 150 mm, 150 mm, 100 mm, 120 mm and 250 mm respectively.

[0051] The sewage passes through the packing area 6 from bottom to top. At this time, there is less remaining carbon source in the water body, and it is difficult to carry out denitrification. Polyhydroxyalkanoates have a good carbon source slow-release effect and can provide sufficient carbon source for denitrification. As a carrier for denitrifying bacteria, the carbon source released by polyhydroxyalkanoates is fully utilized by the denitrifying bacteria on the ceramsite, and part of the total nitrogen is removed through the denitrification process. After the total nitrogen is removed, the sewage continues to rise and passes through the zero-valent iron layer 21 and the lanthanum chloride layer 22. The zero-valent iron is corroded to produce Fe 2+ , and then it is oxidized to Fe 3+ under micro-aerobic conditions. Fe 3+ combines with phosphate ions in the water to form insoluble iron phosphate salt precipitates; lanthanum chloride reacts chemically with phosphate to form insoluble lanthanum phosphate (LaPO 4 ) precipitates. The water body continues to rise. After the iron phosphate salt precipitates and lanthanum phosphate precipitates are filtered by the river sand at the end, the SS of the effluent is ensured to be at a low level.

[0052] Taking a sewage treatment station in a certain rural area as an example, the daily treatment capacity is 50 tons, and the average influent water quality is: COD is 156 mg / L, TP is 3.42 mg / L, TN is 37.7 mg / L, NH 3 -N is 32.4 mg / L, and SS is 150 mg / L; the reflux ratio is 200%.

[0053] Under the condition of not adding extra carbon source and phosphorus removal agent in this embodiment, the average effluent water quality is: COD is 14.1 mg / L, and the removal rate is 91%; TP is 0.47 mg / L, and the removal rate is 86%; TN is 15.18 mg / L, and the removal rate is 60% (no extra carbon source is added in this embodiment); NH 3 -N is 1.38 mg / L, and the removal rate is 96%, SS is 5 mg / L, and the removal rate is 97%. It can be seen that the treatment effect of the sewage treatment device in this embodiment is better.

[0054] If the heavy ion microporous membrane module of this embodiment is removed and the packing area is changed to a common river sand layer with the same thickness at the same time, the TP removal rate of the effluent is 80%, the TN removal rate is 45%, NH 3 -N removal rate is 83%, and SS removal rate is 78%. It can be seen that the heavy ion microporous membrane module and the packing area play a role in improving the overall nitrogen and phosphorus removal.

Claims

1. A sewage treatment device containing a membrane module, characterized in that: It comprises a cylindrical processor, which is a sleeve structure, including an inner processing part of an inner layer and an outer processing part of an outer layer, wherein the inner processing part comprises a first aerobic zone, a three-phase separation zone, an inclined plate sedimentation zone and a filler zone from bottom to top, and the outer processing part comprises an anaerobic zone, an anoxic zone and a second aerobic zone from bottom to top; The outer wall of the anaerobic zone is provided with a water inlet pipe for inputting sewage; the inner wall of the anaerobic zone is provided with at least one delivery pump for inputting the sewage treated in the anaerobic zone into the first aerobic zone; a return pipe is provided above the three-phase separation zone, and the return pipe passes through the outer wall of the inner treatment part, and is used to return the sewage to the second aerobic zone, so that the water body flows through the second aerobic zone, the anoxic zone and the anaerobic zone in sequence for denitrification treatment; A heavy ion microporous membrane assembly is provided in the anoxic zone, and the membrane tubes of the heavy ion microporous membrane assembly are all arranged horizontally and evenly along the circumference of the anoxic zone. The membrane tubes include a load membrane tube and a ventilation membrane tube. Microorganisms are loaded on the load membrane tube to achieve synchronous nitrification and denitrification and short-range nitrification and denitrification, thereby improving the total nitrogen removal rate; The filler area includes an expanded clay layer, a phosphorus removal layer and a river sand layer from bottom to top. The expanded clay layer is loaded with denitrifying bacteria, so that the water passing through the filler layer is then subjected to denitrification treatment, phosphorus removal treatment and filtration treatment in sequence, so that the effluent meets the standards.

2. A sewage treatment device containing a membrane module according to claim 1, characterized in that: The inner processing part is cylindrical, the outer processing part is annular, and a partition is provided between the inner processing part and the outer processing part, and the partition is the outer side wall of the inner processing part or the inner side wall of the outer processing part; A plurality of delivery pumps are arranged on the partition along the circumference of the inner treatment part. The delivery pumps penetrate the partition and are located in the middle and lower part of the partition to avoid sending too much anaerobic sludge into the first aerobic zone.

3. A sewage treatment device containing a membrane module according to claim 1, characterized in that: A mud discharge pipe is arranged on the outer side wall of the anaerobic zone, the height of the mud discharge pipe is lower than the height of the water inlet pipe, and the positions of the mud discharge pipe, the water inlet pipe and the delivery pump are staggered with each other.

4. A sewage treatment device containing a membrane module according to claim 1, characterized in that: A first partition is provided between the anaerobic zone and the anoxic zone, and a second partition is provided between the anoxic zone and the second aerobic zone, to avoid the sludge in each zone from being connected in series to a certain extent; a first aeration pipe is provided in the middle and lower part of the second aerobic zone to aerate the second aerobic zone and also meet the oxygen demand of the anoxic zone.

5. A sewage treatment device containing a membrane module according to claim 2, characterized in that: The heavy ion microporous membrane assembly comprises a plurality of membrane tubes and assembly racks at both ends of the membrane tubes, one end of the membrane tube points to the inner processing part and is connected to the inner assembly rack, and the other end points to the outer side wall of the outer processing part and is connected to the outer assembly rack; The membrane tubes have the same length and are parallel to each other, the axial direction of the membrane tubes is horizontal, and a plurality of membrane tubes are evenly arranged along the circumference of the anoxic zone.

6. A sewage treatment device containing a membrane module according to claim 5, characterized in that: The inner component frame and the outer component frame are both circular, the inner component frame is close to the partition, and the outer component frame is close to the outer side wall of the external processing part, and the diameter of the inner component frame is smaller than the diameter of the outer component frame; the inner component frame and the outer component frame are used to support the membrane tube, and the interiors of the two component frames are hollow and are respectively connected to the corresponding ends of the ventilation membrane tube.

7. A sewage treatment device containing a membrane module according to claim 6, characterized in that: The inner component frame of the ventilation membrane tube is connected to the air supply device outside the processor through the air supply pipe to provide oxygen for the membrane tube, and the outer component frame is connected to the external atmospheric environment of the processor through the air outlet pipe to discharge tail gas for the membrane tube.

8. A sewage treatment device containing a membrane module according to claim 6, characterized in that: The two ends of the loaded membrane tube are closed and not connected to the inside of the inner component frame and the outer component frame. The loaded membrane tube is loaded with short-range nitrification functional bacteria, anaerobic ammonia oxidation functional bacteria, sulfur autotrophic denitrification functional bacteria, and iron ammonia oxidation functional bacteria to play a biochemical role.

9. A sewage treatment device containing a membrane module according to claim 1, characterized in that: A second aeration pipe is provided at the bottom of the first aerobic zone, and the three-phase separation zone includes a plurality of three-phase separators; The inclined plate sedimentation area includes a plurality of inclined plates arranged side by side for mud and water separation, and the separated water body rises and passes through the filling area; a water outlet pipe is provided at the top of the filling area to discharge the treated water.

10. A sewage treatment device containing a membrane module according to claim 1, characterized in that: The filler area includes a carbon source layer, a ceramsite layer, a phosphorus removal layer and a river sand layer from bottom to top, the carbon source layer is a polyhydroxyalkanoate layer, the ceramsite layer is formed by stacking ceramsite, denitrifying bacteria are loaded on the ceramsite, the phosphorus removal layer includes a zero-valent iron layer below and a lanthanum chloride layer above, and the river sand layer is formed by stacking river sand.

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