Distributed sewage treatment system suitable for northern rural areas

Abstract

The utility model provides a decentralized sewage treatment system suitable for northern rural areas, which belongs to the technical field of sewage treatment, and adopts the technical scheme that the decentralized sewage treatment system comprises a three-grid excrement regulating reservoir and a soil infiltration system which are buried underground, one side of the three-grid excrement regulating reservoir is connected with a biodegradation tank through a pipeline, the biodegradation tank is also buried underground, and the soil infiltration system is connected with the three-grid excrement regulating reservoir through a pipeline. A water distribution pipe is arranged on one side of the biodegradation tank, one end of the water distribution pipe penetrates through the bottom of the soil infiltration system, an isolation layer is arranged below the soil infiltration system, and the water distribution pipe is located between the soil infiltration system and the isolation layer; according to the sewage treatment system, direct influence of a low-temperature environment on operation of the system is avoided through the three-grid excrement regulating tank and the soil percolation system which are buried underground, the problem that traditional decentralized sewage treatment is low in adaptability in low-temperature areas is solved, the possibility of polluting underground water can be eradicated through the arrangement of the isolation layer, and the reliability of the sewage treatment system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and more specifically, particularly relates to a decentralized sewage treatment system suitable for northern rural areas. Background Art

[0002] Decentralized sewage treatment technology usually uses soil infiltration system. Its excellent economic and environmental benefits make it the preferred technology for decentralized sewage treatment in many developed countries.

[0003] However, traditional decentralized sewage treatment is only applicable to the southern region. The northern region has low temperatures in winter and a long freezing period, so land infiltration technology cannot be applied. In addition, the low temperature makes the activity of biological species poor, and the biochemical treatment effect of sewage is not good. Moreover, it cannot guarantee that the pollutants in the sewage entering the land infiltration system will be completely absorbed and decomposed, and it cannot guarantee that the groundwater source will not be polluted. In addition, the essence of land infiltration technology is to digest sewage through soil evaporation, decomposition and plant transpiration and absorption. The infiltration system is laid about 500mm below the surface. In summer, the rainfall increases and the groundwater level rises. It is impossible to completely treat the sewage to meet the standards without polluting the groundwater by relying solely on soil evaporation, decomposition and plant transpiration and absorption. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a decentralized sewage treatment system suitable for northern rural areas to solve the technical problems in the prior art that traditional decentralized sewage treatment is not suitable for low-temperature areas and has low adaptability; and cannot guarantee that groundwater sources will not be polluted, resulting in its lack of reliability.

[0005] The purpose and effect of the utility model, a decentralized sewage treatment system suitable for northern rural areas, are achieved by the following specific technical means:

[0006] A decentralized sewage treatment system suitable for northern rural areas comprises a three-compartment manure and sewage regulating pool and a soil infiltration system buried underground, one side of the three-compartment manure and sewage regulating pool is connected to a biodegradation tank via a pipeline, the biodegradation tank is also buried underground, one side of the biodegradation tank is provided with a water distribution pipe, one end of the water distribution pipe is passed through the bottom of the soil infiltration system, an isolation layer is provided below the soil infiltration system, and the water distribution pipe is located between the soil infiltration system and the isolation layer.

[0007] According to a preferred embodiment, the isolation layer includes a gravel layer, and the gravel layer is arranged at the bottom of the water distribution pipe, and the laying thickness of the gravel layer is 100 mm.

[0008] According to a preferred embodiment, the isolation layer also includes a backfill soil layer, the backfill soil layer is arranged at the bottom of the gravel layer, an anti-seepage layer is arranged at the bottom of the backfill soil layer, and the laying thickness of the backfill soil layer is 200 mm.

[0009] According to a preferred embodiment, three groups of compartmentalized pools are arranged in the three-compartment manure and sewage regulating pool, and a manure inlet pipe is arranged on one side of the three-compartment manure and sewage regulating pool, and the manure inlet pipe is connected to one of the compartmentalized pools.

[0010] According to a preferred embodiment, a submersible sewage pump is arranged in one group of the compartment pools, a backwashing device is connected to the top of the biodegradable tank, and the submersible sewage pump is connected to the backwashing device through a pipeline.

[0011] According to a preferred embodiment, a degradation cavity is provided on the top of the biodegradable tank, and a filler is arranged in the degradation cavity.

[0012] According to a preferred embodiment, an aeration fan is installed on the ground, and one end of the aeration fan is connected to the biodegradation tank through an aeration pipe.

[0013] According to a preferred embodiment, the three-compartment manure and sewage regulating tank is made of fiberglass or brick-concrete material, and the volume ratio of the three groups of compartment tanks is 2:1:3.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Through the setting of the three-compartment manure and sewage regulating pool and the soil infiltration system buried underground, when using the sewage treatment system, the treatment facilities are buried underground, which not only ensures the concealment of the system, but also avoids the direct impact of the low temperature environment on the system operation. It is suitable for low-temperature areas such as rural areas in the north, and solves the problem of low adaptability of traditional decentralized sewage treatment in low-temperature areas.

[0016] 2. The setting of the isolation layer can effectively prevent the treated sewage from secondary pollution of groundwater sources; when using the sewage treatment system, the treated sewage is guided into the deep soil infiltration system, and the harmful substances in the sewage can be effectively removed and further purified through the filtration of the gravel layer and the backfill soil layer. The setting of the anti-seepage layer can eliminate the possibility of groundwater pollution, thereby improving the reliability of the sewage treatment system.

[0017] 3. Through the setting of biodegradable tanks, when using the sewage treatment system, preliminary treatment is carried out through the three-compartment manure regulating tank, and then biodegraded by the biodegradable tank. The biodegradable tank is equipped with fillers, aeration fans and backwashing devices to create anaerobic, aerobic and facultative anaerobic environments, thereby improving the efficiency and quality of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a decentralized sewage treatment system suitable for northern rural areas of the utility model;

[0019] Figure 2 This is an exploded diagram of a decentralized sewage treatment system suitable for northern rural areas of the utility model;

[0020] Figure 3 This is a front view of a decentralized sewage treatment system suitable for northern rural areas of the utility model;

[0021] Figure 4 for Figure 3 Schematic diagram of the structure after decomposition.

[0022] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0023] 11. Three-compartment manure and sewage regulating tank; 12. Soil infiltration system; 13. Biodegradation tank; 14. Water distribution pipe; 15. Aeration fan; 16. Aeration pipe; 17. PLC control cabinet; 21. Gravel layer; 22. Backfill soil layer; 23. Anti-seepage layer; 31. Grid tank; 32. Manure inlet pipe; 33. Submersible sewage pump; 41. Degradation chamber; 42. Filler. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0025] Example:

[0026] As attached Figure 1 To Attachment Figure 4 As shown:

[0027] The utility model provides a decentralized sewage treatment system suitable for northern rural areas, comprising a three-compartment manure and sewage regulating pool 11 and a soil infiltration system 12 buried underground. One side of the three-compartment manure and sewage regulating pool 11 is connected to a biodegradable tank 13 through a pipeline, and the biodegradable tank 13 is also buried underground. A water distribution pipe 14 is arranged on one side of the biodegradable tank 13, and one end of the water distribution pipe 14 is passed through the bottom of the soil infiltration system 12; at the same time, an isolation layer is also arranged below the soil infiltration system 12, and the water distribution pipe 14 is located between the soil infiltration system 12 and the isolation layer. The treatment facilities are buried underground, which not only ensures the concealment of the system, but also well avoids the direct influence of the low temperature environment on the operation of the system. Since the main treatment equipment is buried underground, the system has strong adaptability to the low temperature environment, can well adapt to the conditions of low temperature areas such as northern rural areas, and solves the problem of low adaptability of traditional decentralized sewage treatment in low temperature areas.

[0028] Please refer to Figure 3 and Figure 4 As shown, the isolation layer includes a gravel layer 21. In order to ensure the infiltration effect below the water distribution pipe 14, a layer of gravel is laid at the bottom of the water distribution pipe 14. The gravel layer 21 has a thickness of 100 mm to ensure that the sewage can infiltrate smoothly into the lower soil.

[0029] Please refer to Figure 4 As shown, the isolation layer also includes a backfill soil layer 22, and the backfill soil layer 22 has a thickness of 200 mm, which can play a good filtering role. At the same time, a layer of impermeable layer 23 is also provided at the bottom of the backfill soil layer 22, which can effectively prevent sewage from penetrating downwards and avoid groundwater pollution. The treated sewage can be further purified by the cooperation of the two layers of filter materials, the gravel layer 21 and the backfill soil layer 22. Since the porosity of the gravel layer 21 is large, it is conducive to the penetration of sewage, and the backfill soil layer 22 can play a good filtering effect, filtering and removing some harmful substances in the sewage. At the same time, the setting of the impermeable layer 23 can prevent sewage from penetrating downwards, fundamentally eliminating the pollution of groundwater, and improving the reliability of the sewage treatment system.

[0030] Please refer to Figure 2 , Figure 3 and Figure 4 As shown, three groups of grid pools 31 are arranged in the three-grid manure and sewage regulating pool 11, which divide the pool body into three independent compartments, and the compartments are connected by manure pipes. At the same time, a manure inlet pipe 32 is also arranged on one side of the three-grid manure and sewage regulating pool 11, and the manure inlet pipe 32 is connected to one group of grid pools 31. After the manure and sewage enter the corresponding grid pool 31 through the manure inlet pipe 32, primary treatment can be carried out first, and the treated manure and sewage then enter the subsequent grid pools 31 in turn to achieve the purpose of graded treatment. The three grid pools 31 are isolated by setting compartments, which is conducive to the independent treatment of manure and sewage in each grid pool 31.

[0031] Please refer to Figure 2 and Figure 4 As shown, a submersible sewage pump 33 is provided in one of the compartments 31, and the submersible sewage pump 33 is connected to the backwashing device on the top of the biodegradable tank 13 through a pipeline structure; this realizes that the feces and sewage are directly sent to the biodegradable tank 13 for further treatment after being pumped from the compartment 31; at the same time, a degradation chamber 41 is specially opened on the top of the biodegradable tank 13, and a filler 42 is laid in the degradation chamber 41. The filler 42 has a good biodegradability. After being pumped, the feces and sewage can smoothly enter the degradation chamber 41 and undergo efficient degradation treatment under the catalysis of the filler 42.

[0032] Please refer to Figure 2As shown, an aeration fan 15 is installed on the ground, and the aeration fan 15 is connected to the biodegradation tank 13 through an aeration pipe 16, which provides anaerobic, aerobic and anaerobic environmental conditions in the biodegradation tank 13, which is not only conducive to the growth and reproduction of organisms, but also better improves the efficiency of sewage treatment; in addition, a PLC control cabinet 17 is also installed on the ground. The PLC control cabinet 17 serves as a central control device. It can be electrically connected to various important equipment in the system, such as the submersible sewage pump 33 and the aeration fan 15, through cables, so that each device can be uniformly dispatched by the PLC control cabinet 17 to achieve automatic operation.

[0033] The three-compartment manure and sewage regulating tank 11 is made of a sturdy and durable material, which can be made of fiberglass or concrete bricks, which is conducive to the long-term use and corrosion resistance of the three-compartment manure and sewage regulating tank 11. The volume ratio of the three-group compartment tank 31 is 2:1:3; the burial depth of the soil infiltration system 12 is 300mm~800mm, the soil water holding capacity is 220~300g / kg, the soil density is 2.6~2.7g / cm3, and the maximum treated water volume is: 6L / d.m2, which meets actual needs. The water distribution pipe 14 is a DN110PVC perforated pipe, and the PVC material has corrosion resistance.

[0034] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A decentralized sewage treatment system suitable for northern rural areas, Features: The invention comprises a three-compartment manure and sewage regulating pool (11) and a soil infiltration system (12) buried underground. One side of the three-compartment manure and sewage regulating pool (11) is connected to a biodegradable tank (13) buried underground via a pipeline. One side of the biodegradable tank (13) is provided with a water distribution pipe (14). One end of the water distribution pipe (14) is passed through the bottom of the soil infiltration system (12). An isolation layer is provided below the soil infiltration system (12). The water distribution pipe (14) is located between the soil infiltration system (12) and the isolation layer.

2. A decentralized sewage treatment system suitable for northern rural areas as claimed in claim 1, Features: The isolation layer comprises a gravel layer (21), and the gravel layer (21) is arranged at the bottom of the water distribution pipe (14), and the laying thickness of the gravel layer (21) is 100 mm.

3. A decentralized sewage treatment system suitable for northern rural areas as claimed in claim 2, Features: The isolation layer also includes a backfill soil layer (22), the backfill soil layer (22) is arranged at the bottom of the gravel layer (21), an anti-seepage layer (23) is arranged at the bottom of the backfill soil layer (22), and the laying thickness of the backfill soil layer (22) is 200 mm.

4. A decentralized sewage treatment system suitable for northern rural areas as claimed in claim 1, Features: Three groups of compartment pools (31) are arranged in the three-compartment manure and sewage regulating pool (11), and a manure inlet pipe (32) is arranged on one side of the three-compartment manure and sewage regulating pool (11), and the manure inlet pipe (32) is connected to one of the compartment pools (31).

5. A decentralized sewage treatment system suitable for northern rural areas as claimed in claim 4, Features: A submersible sewage pump (33) is arranged in one group of the compartment pools (31), a backwashing device is connected to the top of the biodegradable tank (13), and the submersible sewage pump (33) is connected to the backwashing device via a pipeline.

6. A decentralized sewage treatment system suitable for northern rural areas as claimed in claim 5, Features: A degradation chamber (41) is provided on the top of the biodegradable tank (13), and a filler (42) is arranged in the degradation chamber (41).

7. A decentralized sewage treatment system suitable for northern rural areas as claimed in claim 6, Features: An aeration fan (15) is installed on the ground, and one end of the aeration fan (15) is connected to the biodegradation tank (13) through an aeration pipe (16).

8. A decentralized sewage treatment system suitable for northern rural areas as claimed in claim 7, Features: The three-compartment manure and sewage regulating tank (11) is made of glass fiber reinforced plastic or brick-concrete material, and the volume ratio of the three groups of compartment tanks (31) is 2:1:3.

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