Surface flow wetland composite pond structure for sewage treatment

Abstract

The present invention discloses a surface flow wetland composite pond structure for sewage treatment, and relates to the technical field of sewage treatment, the surface flow wetland composite pond structure comprises a surface flow wetland, one side of the surface flow wetland is provided with a stabilization pond, and a rectangular first culvert pipe is connected between the surface flow wetland and the stabilization pond. And the shunting structure is arranged on the other side of the surface flow wetland. According to the invention, the pretreatment structure is utilized to realize the pretreatment effect on sewage; therefore, the conditions that the sewage is easy to generate odor or block in the storage and transportation processes, the untreated sewage is easy to pollute soil and underground water or pollute plants, the surface flow wetland and the stabilization pond are relatively large in load, and the effluent quality is not easy to reach the recycling standard are effectively avoided; the surface flow wetland composite pond structure solves the technical problem that the existing surface flow wetland composite pond structure for sewage treatment adopts a direct precipitation treatment mode and has great defects, and compared with the prior art, the surface flow wetland composite pond structure has a better sewage treatment effect.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, in particular to a surface flow wetland composite pond structure for sewage treatment. Background Art

[0002] In recent years, rural domestic sewage mainly includes toilet flushing sewage and laundry, rice washing, vegetable washing, and bathing wastewater. Random discharge will cause surface water and groundwater pollution. In view of the weak financial situation in rural areas and the low actual bearing capacity of farmers, choosing a sewage treatment technology with low investment, simplicity, ease of operation, stable operation and convenient maintenance and management is an important issue currently facing rural sewage treatment. Artificial wetlands and ecological ponds use the triple synergistic effects of physics, chemistry and biology in natural ecosystems to purify sewage. To meet the above characteristics, in order to better treat sewage, a composite structure of surface flow wetlands and stabilization ponds is usually used to achieve multiple treatments of sewage to ensure the purification effect of sewage.

[0003] When the existing surface flow wetland composite pond structure is used, the sewage is usually directly sent to the surface flow wetland and stabilization pond for treatment after sedimentation. This direct treatment method has major disadvantages. First, the sewage is prone to odor or blockage during storage and transportation. Second, untreated sewage is easy to pollute the soil and groundwater or pollute plants. Third, the surface flow wetland and stabilization pond have a large load on sewage treatment. Fourth, the effluent water quality is not easy to meet the recyclable standard. In view of this, we propose a surface flow wetland composite pond structure for sewage treatment. Summary of the invention

[0004] The present invention aims to solve the technical problems existing in the prior art; to this end, the present invention proposes a surface flow wetland composite pond structure for sewage treatment.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A surface flow wetland composite pond structure for sewage treatment comprises a surface flow wetland, a stabilization pond is arranged on one side of the surface flow wetland, and a rectangular first culvert is connected between the surface flow wetland and the stabilization pond.

[0006] The diversion structure is arranged on the other side of the surface flow wetland, and the diversion structure ensures that the sewage flows completely through the surface flow wetland by overflow.

[0007] The pretreatment structure is arranged on one side of the diversion structure, and is used to pretreat the sewage.

[0008] As a further solution of the present invention: the diversion structure includes a pre-storage tank arranged between the surface flow wetland and the pretreatment structure, and a rectangular second culvert is arranged on the top of the pre-storage tank facing the surface flow wetland. The second culvert is connected to the surface flow wetland, and the interior of the second culvert is divided into several groups of diversion chambers at equal intervals.

[0009] As a further solution of the present invention: the pretreatment structure consists of a filtration tank, a first sedimentation tank, a hydrolysis acidification tank, an aerobic activated sludge tank and a second sedimentation tank, and the filtration tank, the first sedimentation tank, the hydrolysis acidification tank, the aerobic activated sludge tank and the second sedimentation tank are arranged in sequence from front to back, and the inner bottoms of the hydrolysis acidification tank and the aerobic activated sludge tank are both arranged with conductive structures.

[0010] As a further solution of the present invention: the conductive structure includes a disc and an output end tube arranged in the pretreatment structure, the interior of the disc is hollow, and the top of the disc is circular with several groups of output end tubes evenly distributed, and the output end tubes are arranged at a 45° inclination.

[0011] As a further solution of the present invention: a plurality of barrier dams are arranged at equal intervals inside the surface flow wetland, the interior of the surface flow wetland is divided into a plurality of wetland cells by the barrier dams, the diversion chambers and the wetland cells are arranged symmetrically, a plurality of diversion dams are arranged at equal intervals between the wetland cells, and the interior of the wetland cells is divided into an S-shape by the diversion dams.

[0012] As a further solution of the present invention: a sewage inlet is arranged on the side of the filter tank facing away from the first sedimentation tank, and a through hole is opened at the top position between the filter tank and the first sedimentation tank.

[0013] As a further solution of the present invention: a delivery pump is arranged on the top of the first sedimentation tank, the hydrolysis acidification tank, the aerobic activated sludge tank and the second sedimentation tank.

[0014] As a further solution of the present invention: a matrix layer is arranged inside the surface flow wetland, and aquatic plants are planted on the matrix layer, and bacteria, algae, protozoa, metazoa, aquatic plants and higher aquatic animals are present in the stabilization pond.

[0015] As a further solution of the present invention: a plurality of groups of grids are arranged at equal intervals in the filtration tank, bacteria and microorganisms are stored in the hydrolysis acidification tank, and activated sludge is stored in the aerobic activated sludge tank, and the activated sludge contains anaerobic and aerobic microorganisms.

[0016] As a further solution of the present invention: an aeration structure is arranged at the bottom of the pre-storage tank, the aeration structure includes an aeration pump, the aeration pump is arranged outside the pre-storage tank, a main pipe is arranged at the output end of the aeration pump, a plurality of groups of branch pipes are arranged at equal intervals on one side of the main pipe, the branch pipes are located at the inner bottom of the pre-storage tank, and a plurality of groups of aeration ports are opened at equal intervals on the top of the branch pipes.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present application can filter the residue in the sewage by utilizing the filtration tank, the hydrolysis acidification tank can improve the biodegradability of the sewage, convert the macromolecular organic matter into small molecules, remove the COD in the wastewater, and the aerobic activated sludge tank can remove organic matter, improve the water quality, and degrade pollutants; the pretreatment structure is utilized to achieve the pretreatment effect on the sewage, thereby effectively avoiding the odor or blockage of the sewage during the storage and transportation process, the untreated sewage is easy to pollute the soil and groundwater or pollute plants, the surface flow wetland and the stabilization pond are overloaded, and the effluent water quality is not easy to reach the recycling standard, and solves the technical problem that the current surface flow wetland composite pond structure used for sewage treatment adopts the sedimentation direct treatment method with great disadvantages, and has a better effect on sewage treatment than the existing technology.

[0018] 2. The present application sets a conduction structure inside the hydrolysis acidification tank and the aerobic activated sludge tank, uses a corresponding delivery pump to transport the sewage to the inside of the disc, and sprays it out from the output end pipe into the corresponding hydrolysis acidification tank and the aerobic activated sludge tank. The sewage sprayed out from the output end pipe will have a spiral direction, so that the sewage entering the hydrolysis acidification tank and the aerobic activated sludge tank is in a vortex state, so that the sewage can be fully contacted with the decomposed products in the hydrolysis acidification tank and the aerobic activated sludge tank, thereby greatly improving the treatment efficiency of the hydrolysis acidification tank and the aerobic activated sludge tank for sewage, shortening the treatment time, and thus improving the treatment efficiency of the pretreatment structure for sewage.

[0019] 3. The present application sets a diversion structure between the pretreatment structure and the surface flow wetland, and divides the surface flow wetland into several groups of wetland cells through a barrier dam. The pretreated sewage enters the pre-storage tank of the diversion structure. When the sewage water level in the pre-storage tank rises to the second culvert, the sewage will overflow from the diversion cavity at the second culvert at the same time. The sewage can flow evenly into the corresponding wetland cells of the surface flow wetland through overflow, thereby ensuring that the sewage flows through the surface flow wetland in an all-round way, achieving full utilization of the surface flow wetland and improving the utilization rate of the surface flow wetland. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a first overall structural schematic diagram of the present invention; Figure 2 It is a second overall structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the shunt structure of the present invention; Figure 4 It is a schematic diagram of the aeration structure of the present invention; Figure 5 It is a schematic diagram of the conduction structure of the present invention; Figure 6 It is a cross-sectional schematic diagram of the conductive structure of the present invention.

[0021] In the figure: 1. surface flow wetland; 101. barrier dam; 102. wetland cell; 103. diversion dam; 2. stabilization pond; 3. first culvert; 4. diversion structure; 401. pre-storage tank; 402. second culvert; 403. diversion chamber; 5. aeration structure; 501. aeration pump; 502. main pipe; 503. branch pipe; 504. aeration port; 6. pretreatment structure; 7. filtration tank; 8. first sedimentation tank; 9. hydrolysis acidification tank; 10. aerobic activated sludge tank; 11. second sedimentation tank; 12. delivery pump; 13. sewage inlet; 14. through hole; 15. conduction structure; 1501. disc; 1502. output end pipe. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1 See also Figure 1-Figure 4 As shown, the present application provides a surface flow wetland composite pond structure for sewage treatment, comprising a surface flow wetland 1, a stabilization pond 2 is arranged on one side of the surface flow wetland 1, and a rectangular first culvert 3 is connected between the surface flow wetland 1 and the stabilization pond 2; The diversion structure 4 is arranged on the other side of the surface flow wetland 1, and the diversion structure 4 ensures that the sewage flows completely through the surface flow wetland 1 by overflow; The pre-treatment structure 6 is arranged on one side of the diversion structure 4, and is used to pre-treat the sewage.

[0024] The pretreatment structure 6 is composed of a filter tank 7, a first sedimentation tank 8, a hydrolysis acidification tank 9, an aerobic activated sludge tank 10 and a second sedimentation tank 11. The filter tank 7, the first sedimentation tank 8, the hydrolysis acidification tank 9, the aerobic activated sludge tank 10 and the second sedimentation tank 11 are arranged in sequence from front to back, and the inner bottoms of the hydrolysis acidification tank 9 and the aerobic activated sludge tank 10 are both arranged with a conductive structure 15. When treating sewage, the sewage is first pretreated by the pretreatment structure 6, and the sewage passes through the filter tank 7, the first sedimentation tank 8, the hydrolysis acidification tank 9, the aerobic activated sludge tank 10 and the second sedimentation tank 11 in sequence. The filter tank 7 can filter the residue in the sewage, and then enter the first sedimentation tank 8 for precipitation. The sewage after precipitation enters the hydrolysis acidification tank 9, which can improve the biodegradability of sewage, convert large molecular organic matter into small molecules, and remove COD in the wastewater. The sewage treated by the hydrolysis acidification tank 9 enters the aerobic activated sludge tank 10. 10 can remove organic matter, improve water quality and degrade pollutants. Therefore, after the sewage is treated by the pretreatment structure 6, it can effectively avoid the occurrence of odor or blockage in the storage and transportation of sewage, the untreated sewage is easy to pollute the soil and groundwater or pollute plants, the surface flow wetland 1 and the stabilization pond 2 are overloaded and the effluent water quality is not easy to meet the recycling standard. The pretreated sewage enters the surface flow wetland 1 through the diversion structure 4, the surface flow wetland 1 purifies the sewage, and the purified sewage enters the stabilization pond 2, the stabilization pond 2 purifies the sewage again and then discharges it.

[0025] Several groups of barrier dams 101 are arranged at equal intervals inside the surface flow wetland 1, and the surface flow wetland 1 is divided into several groups of wetland cells 102 by the barrier dams 101. The diversion chamber 403 and the wetland cells 102 are arranged symmetrically, and several groups of diversion dams 103 are arranged at equal intervals between the wetland cells 102. The inside of the wetland cells 102 is divided into an S-shaped direction by the diversion dams 103. The sewage flows in the wetland cells 102 in an S-shaped manner, increasing the speed and distance of the sewage flowing in the wetland cells 102, thereby further improving the sewage treatment effect of the surface flow wetland 1.

[0026] The filter tank 7 is provided with a sewage inlet 13 on the side facing away from the first sedimentation tank 8, and a through hole 14 is provided at the top between the filter tank 7 and the first sedimentation tank 8. Sewage enters the filter tank 7 through the sewage inlet 13, and the sewage filtered by the filter tank 7 overflows through the through hole 14 and enters the first sedimentation tank 8 for sedimentation treatment.

[0027] A delivery pump 12 is arranged at the top of the first sedimentation tank 8, the hydrolysis acidification tank 9, the aerobic activated sludge tank 10 and the second sedimentation tank 11. The output end of the delivery pump 12 at the top of the first sedimentation tank 8 is connected to the inner cavity of the internal disk 1501 of the hydrolysis acidification tank 9 through a conduit, the output end of the delivery pump 12 at the top of the hydrolysis acidification tank 9 is connected to the inner cavity of the internal disk 1501 of the aerobic activated sludge tank 10 through a conduit, and the output end of the delivery pump 12 at the top of the second sedimentation tank 11 is connected to the input end of the pre-storage tank 401 through a conduit. The sewage precipitated in the first sedimentation tank 8 is transported to the hydrolysis acidification tank 9 through the corresponding delivery pump 12, the sewage purified in the hydrolysis acidification tank 9 is transported to the aerobic activated sludge tank 10 through the corresponding delivery pump 12, the sewage purified in the aerobic activated sludge tank 10 is transported to the second sedimentation tank 11 through the corresponding delivery pump 12, and the sewage precipitated in the second sedimentation tank 11 is transported to the pre-storage tank 401 through the corresponding delivery pump 12.

[0028] The surface flow wetland 1 is provided with a matrix layer inside, and aquatic plants are planted on the matrix layer. The matrix layer can be used for plant production microorganisms to attach, and has the functions of filtering, precipitation, adsorption and flocculation, etc., and can effectively remove suspended matter, nitrogen, phosphorus and other nutrients in the water body. The interception effect of the rhizomes of aquatic plants and the degradation effect of the biofilm generated on the rhizomes can purify the sewage. The stabilization pond 2 contains bacteria, algae, protozoa, metazoa, aquatic plants and higher aquatic animals. The bacteria, algae, protozoa, metazoa, aquatic plants and higher aquatic animals in the stabilization pond 2 form an ecosystem. When sewage enters the stabilization pond 2, the organic pollutants therein are not only degraded and purified by bacteria and fungi, but also the final products of its degradation, some inorganic compounds as carbon sources, nitrogen sources and phosphorus sources, take solar energy as the initial energy, participate in the metabolic process in the food web, and migrate and transform step by step from low trophic levels to high trophic levels, and finally transform into products such as aquatic crops, fish, shrimp, clams, geese, ducks, etc., thereby obtaining considerable economic benefits.

[0029] The filter tank 7 is provided with several groups of grids arranged at equal intervals. When sewage enters the filter tank 7, the grids intercept and filter the residue in the sewage. The hydrolysis acidification tank 9 contains bacteria and microorganisms. The hydrolysis acidification tank 9 purifies the sewage by bacteria and microorganisms to improve the biodegradability of the sewage, convert large molecular organic matter into small molecules, and remove COD in the wastewater. The aerobic activated sludge tank 10 contains activated sludge. The activated sludge contains anaerobic and aerobic microorganisms. The anaerobic and aerobic microorganisms in the activated sludge of the aerobic activated sludge tank 10 purify the sewage, remove organic matter in the sewage, improve water quality, and degrade pollutants.

[0030] An aeration structure 5 is arranged at the bottom of the pre-storage tank 401. The aeration structure 5 includes an aeration pump 501. The aeration pump 501 is arranged outside the pre-storage tank 401. A main pipe 502 is arranged at the output end of the aeration pump 501. A plurality of groups of branch pipes 503 are arranged at equal intervals on one side of the main pipe 502. The branch pipes 503 are located at the bottom of the pre-storage tank 401. A plurality of groups of aeration ports 504 are opened at equal intervals on the top of the branch pipes 503. After the pre-treated sewage enters the pre-storage tank 401, the aeration pump 501 can be controlled to work, and then the air enters the branch pipe 503 through the main pipe 502. Finally, the air is discharged into the sewage from the aeration port 504 of the branch pipe 503, so as to achieve the effect of aerating the sewage in the pre-storage tank 401 and increase the oxygen content of the sewage, so as to ensure that the sewage has sufficient oxygen content after entering the surface flow wetland 1, so as to ensure the purification effect of the aquatic plants in the surface flow wetland 1 on the sewage.

[0031] Embodiment 2 Based on Example 1, see Figure 1 , Figure 2 , Figure 5 and Figure 6 shown.

[0032] The conductive structure 15 includes a disc 1501 and an output end tube 1502 arranged in the pretreatment structure 6. The interior of the disc 1501 is hollow. The top of the disc 1501 is circularly and evenly distributed with a plurality of groups of output end tubes 1502. The output end tubes 1502 are inclined at 45 degrees. When the sewage enters the hydrolysis acidification tank 9 and the aerobic activated sludge tank 10 through the delivery pump 12, the delivery pump 12 delivers the sewage to the inside of the disc 1501, and then sprays it out from the output end pipe 1502 into the corresponding hydrolysis acidification tank 9 and the aerobic activated sludge tank 10, and the sewage sprayed from the output end pipe 1502 will have a spiral direction, so that the sewage entering the hydrolysis acidification tank 9 and the aerobic activated sludge tank 10 will flow in a vortex, directly achieving a stirring and mixing effect, so that the sewage can be fully contacted with the decomposition products in the hydrolysis acidification tank 9 and the aerobic activated sludge tank 10, thereby greatly improving the treatment efficiency of the hydrolysis acidification tank 9 and the aerobic activated sludge tank 10 for sewage, shortening the treatment time, and thus improving the treatment efficiency of the pretreatment structure 6 for sewage.

[0033] Embodiment 3 Based on Example 1, see Figure 1-Figure 3 shown.

[0034] The diversion structure 4 includes a pre-storage tank 401 disposed between the surface flow wetland 1 and the pre-treatment structure 6. A rectangular second culvert 402 is arranged on the top of the pre-storage tank 401 facing the surface flow wetland 1. The second culvert 402 is connected to the surface flow wetland 1. The interior of the second culvert 402 is divided into a plurality of groups of diversion chambers 403 at equal intervals. The pre-treated sewage enters the pre-storage tank 401 of the diversion structure 4. When the sewage water level in the pre-storage tank 401 rises to the second culvert 402, the sewage will overflow from the diversion chamber 403 at the second culvert 402 at the same time. The sewage can flow evenly into the corresponding wetland cells 102 of the surface flow wetland 1 by overflow, thereby ensuring that the sewage flows through the surface flow wetland 1 in an all-round manner, realizing full utilization of the surface flow wetland 1, and improving the utilization rate of the surface flow wetland 1.

[0035] The working principle of the present invention is as follows: when treating sewage, first, the sewage is pretreated by the pretreatment structure 6, and the sewage passes through the filter tank 7, the first sedimentation tank 8, the hydrolysis acidification tank 9, the aerobic activated sludge tank 10 and the second sedimentation tank 11 in sequence. The filter tank 7 can filter the residue in the sewage, and then enter the first sedimentation tank 8 for precipitation. The sewage after precipitation enters the hydrolysis acidification tank 9, which can improve the biodegradability of the sewage, convert large molecular organic matter into small molecules, and remove COD in the wastewater. The sewage treated by the hydrolysis acidification tank 9 enters the aerobic activated sludge tank 10. The oxygen activated sludge pool 10 can remove organic matter, improve water quality, and degrade pollutants. Therefore, after the sewage is treated by the pretreatment structure 6, it can effectively avoid the occurrence of odor or blockage in the storage and transportation of sewage, the untreated sewage is easy to pollute the soil and groundwater or pollute plants, the surface flow wetland 1 and the stabilization pond 2 are heavily loaded, and the effluent water quality is not easy to meet the recycling standard. The pretreated sewage enters the surface flow wetland 1 through the diversion structure 4, the surface flow wetland 1 purifies the sewage, and the purified sewage enters the stabilization pond 2, the stabilization pond 2 purifies the sewage again and then discharges it.

[0036] Secondly, when the sewage enters the hydrolysis acidification tank 9 and the aerobic activated sludge tank 10 through the delivery pump 12, the delivery pump 12 delivers the sewage to the inside of the disc 1501, and then sprays it out from the output end pipe 1502 into the corresponding hydrolysis acidification tank 9 and the aerobic activated sludge tank 10, and the sewage sprayed from the output end pipe 1502 will have a spiral direction, so that the sewage entering the hydrolysis acidification tank 9 and the aerobic activated sludge tank 10 will flow in a vortex, directly achieving a stirring and mixing effect, so that the sewage can be fully contacted with the decomposition products in the hydrolysis acidification tank 9 and the aerobic activated sludge tank 10, thereby greatly improving the treatment efficiency of the hydrolysis acidification tank 9 and the aerobic activated sludge tank 10 for sewage, shortening the treatment time, and thus improving the treatment efficiency of the pretreatment structure 6 for sewage.

[0037] Secondly, the pretreated sewage enters the pre-storage tank 401 of the diversion structure 4, the aeration pump 501 can be controlled to work, and then the air enters the branch pipe 503 through the main pipe 502, and finally the air is discharged into the sewage from the aeration port 504 of the branch pipe 503, so as to achieve the effect of aerating the sewage in the pre-storage tank 401 and increase the oxygen content of the sewage, so as to ensure that the sewage has sufficient oxygen content after entering the surface flow wetland 1, so as to ensure the purification effect of the aquatic plants in the surface flow wetland 1 on the sewage. When the sewage water level in the pre-storage tank 401 rises to the second culvert 402, the sewage will overflow from the diversion cavity 403 at the second culvert 402 at the same time, and the sewage can be evenly flowed into the corresponding wetland cell 102 of the surface flow wetland 1 by overflow, so as to ensure that the sewage flows through the surface flow wetland 1 in an all-round way, so as to achieve full utilization of the surface flow wetland 1 and improve the utilization rate of the surface flow wetland 1.

[0038] Finally, under the action of the diversion dam 103, the sewage flows in the wetland cells 102 in an S shape, increasing the speed and distance of the sewage flowing in the wetland cells 102, thereby further improving the sewage treatment effect of the surface flow wetland 1.

[0039] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A surface flow wetland composite pond structure for sewage treatment, characterized in that: It comprises a surface flow wetland (1), a stabilization pond (2) is arranged on one side of the surface flow wetland (1), and a rectangular first culvert (3) is connected between the surface flow wetland (1) and the stabilization pond (2); A diversion structure (4) is arranged on the other side of the surface flow wetland (1), and the diversion structure (4) ensures that the sewage flows completely through the surface flow wetland (1) by overflow; The pretreatment structure (6) is arranged on one side of the diversion structure (4), and the pretreatment structure (6) is used to pretreat sewage.

2. The surface flow wetland composite pond structure for sewage treatment according to claim 1 is characterized in that: The diversion structure (4) comprises a pre-storage pool (401) arranged between a surface flow wetland (1) and a pre-treatment structure (6); a rectangular second culvert (402) is arranged on the top of the pre-storage pool (401) facing the surface flow wetland (1); the second culvert (402) is connected to the surface flow wetland (1); and the interior of the second culvert (402) is divided into a plurality of groups of diversion chambers (403) at equal intervals.

3. The surface flow wetland composite pond structure for sewage treatment according to claim 1 is characterized in that: The pretreatment structure (6) is composed of a filtration tank (7), a first sedimentation tank (8), a hydrolysis acidification tank (9), an aerobic activated sludge tank (10) and a second sedimentation tank (11); the filtration tank (7), the first sedimentation tank (8), the hydrolysis acidification tank (9), the aerobic activated sludge tank (10) and the second sedimentation tank (11) are arranged in sequence from front to back; and the inner bottoms of the hydrolysis acidification tank (9) and the aerobic activated sludge tank (10) are both arranged with a conductive structure (15).

4. The surface flow wetland composite pond structure for sewage treatment according to claim 3 is characterized in that: The conductive structure (15) comprises a disc (1501) and an output end tube (1502) arranged in the pretreatment structure (6); the interior of the disc (1501) is hollow; the top of the disc (1501) is circular with a plurality of groups of output end tubes (1502) equidistantly distributed; the output end tubes (1502) are arranged at an inclination of 45 degrees.

5. The surface flow wetland composite pond structure for sewage treatment according to claim 2, characterized in that: A plurality of groups of barrier dams (101) are arranged at equal intervals inside the surface flow wetland (1), the surface flow wetland (1) is divided into a plurality of groups of wetland cells (102) by the barrier dams (101), the diversion chamber (403) and the wetland cells (102) are arranged symmetrically, a plurality of groups of diversion dams (103) are arranged at equal intervals between the wetland cells (102), and the wetland cells (102) are divided into an S-shaped direction by the diversion dams (103).

6. The surface flow wetland composite pond structure for sewage treatment according to claim 3, characterized in that: A sewage inlet (13) is arranged on the side of the filter tank (7) facing away from the first sedimentation tank (8), and a through hole (14) is provided at the top position between the filter tank (7) and the first sedimentation tank (8).

7. The surface flow wetland composite pond structure for sewage treatment according to claim 3 is characterized in that: A delivery pump (12) is arranged on the top of each of the first sedimentation tank (8), the hydrolysis acidification tank (9), the aerobic activated sludge tank (10) and the second sedimentation tank (11).

8. The surface flow wetland composite pond structure for sewage treatment according to claim 1, characterized in that: The surface flow wetland (1) is provided with a matrix layer inside, and aquatic plants are planted on the matrix layer. The stabilization pond (2) contains bacteria, algae, protozoa, metazoa, aquatic plants and higher aquatic animals.

9. The surface flow wetland composite pond structure for sewage treatment according to claim 3, characterized in that: The filtration tank (7) has a plurality of groups of grids arranged at regular intervals, the hydrolysis acidification tank (9) contains bacteria and microorganisms, and the aerobic activated sludge tank (10) contains activated sludge containing anaerobic and aerobic microorganisms.

10. The surface flow wetland composite pond structure for sewage treatment according to claim 2, characterized in that: An aeration structure (5) is arranged at the bottom of the pre-storage tank (401), the aeration structure (5) comprising an aeration pump (501), the aeration pump (501) being arranged outside the pre-storage tank (401), a main pipe (502) being arranged at the output end of the aeration pump (501), a plurality of groups of branch pipes (503) being arranged at equal intervals on one side of the main pipe (502), the branch pipes (503) being located at the bottom of the pre-storage tank (401), and a plurality of groups of aeration ports (504) being arranged at equal intervals on the top of the branch pipe (503).

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