CN114644430A - Mountain rural domestic sewage energy-consumption-free treatment system and method - Google Patents
Mountain rural domestic sewage energy-consumption-free treatment system and method Download PDFInfo
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- CN114644430A CN114644430A CN202210202737.6A CN202210202737A CN114644430A CN 114644430 A CN114644430 A CN 114644430A CN 202210202737 A CN202210202737 A CN 202210202737A CN 114644430 A CN114644430 A CN 114644430A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention provides a mountainous rural domestic sewage energy-consumption-free treatment system and method, which comprises a high-level regulating tank, an aerobic tank, a sedimentation tank and an artificial wetland, wherein the high-level regulating tank, the aerobic tank, the sedimentation tank and the artificial wetland are sequentially communicated; the high-level regulating tank is provided with a sewage pipe for collecting sewage, a siphon capable of pumping the sewage in the high-level regulating tank into the aerobic tank is arranged between the high-level regulating tank and the aerobic tank, the end part of the siphon located in the aerobic tank is connected with a water ejector, the top of the water ejector is connected with an air inlet pipe with the top end located above the aerobic tank, and combined fillers are hung in the high-level regulating tank and the aerobic tank. The invention solves the problem of high cost of the mountain rural domestic sewage treatment system in the prior art, and produces the effect of effectively treating the domestic sewage without energy consumption.
Description
Technical Field
The invention relates to the technical field of domestic sewage treatment systems, in particular to a mountain rural domestic sewage energy-consumption-free treatment system and method.
Background
Sewage treatment refers to a process of purifying sewage to meet the water quality requirement of discharging the sewage into a certain water body or reusing the sewage, and is widely applied to various fields of buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscapes, medical treatment, catering and the like.
Mountainous rural traffic is inconvenient, and the difficulty in treating domestic water is high. Common rural domestic sewage treatment technologies comprise anaerobic biogas digester treatment, constructed wetland treatment and land infiltration; the anaerobic aeration tank is high in construction cost, and easily causes environmental damage due to water seepage; the removal capability of the artificial wetland is poor, and the influence on the environment is large; the land infiltration has the problems of unstable operation and easy blockage of soil gaps.
The cost for building a large domestic sewage treatment plant, arranging corresponding conveying pipelines and maintaining the normal operation of the sewage treatment plant in mountainous rural areas is too high; therefore, a domestic sewage treatment system with low cost and strong domestic sewage treatment capacity is urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a mountain rural domestic sewage non-energy consumption treatment system and method, which solve the problem of high cost of the mountain rural domestic sewage treatment system in the prior art.
According to the embodiment of the invention, the mountain rural domestic sewage energy-consumption-free treatment system comprises a high-level regulating tank, an aerobic tank, a sedimentation tank and an artificial wetland which are sequentially communicated; the high-level regulating tank is provided with a sewage pipe for collecting sewage, a siphon capable of pumping the sewage in the high-level regulating tank into the aerobic tank is arranged between the high-level regulating tank and the aerobic tank, the end part of the siphon located in the aerobic tank is connected with a water ejector, the top of the water ejector is connected with an air inlet pipe with the top end located above the aerobic tank, and combined fillers are hung in the high-level regulating tank and the aerobic tank.
Furthermore, a grid is fixedly arranged at the inner top of the high-position adjusting tank, the combined filler is suspended at the bottom of the grid, and the sewage pipe is positioned above the grid.
Further, the grid is in an arc shape protruding upwards.
Furthermore, the aerobic tank is cylindrical, a rotating shaft is coaxially and rotatably arranged at the bottom in the aerobic tank, an impeller and a screen plate are fixedly connected to the rotating shaft, the impeller is located below the screen plate, and the water ejector and the impeller are located at the same height, and the output end of the water ejector faces the impeller.
Furthermore, the middle part of the bottom of the aerobic tank is raised upwards.
Further, the axis of the water ejector and the axis of the impeller are not on the same plane.
Further, the vertical baffle that is provided with in the sedimentation tank, be provided with the desilting piece that connects and promote through the stay cord in the sedimentation tank, the lateral wall of desilting piece with the inner wall of sedimentation tank and the lateral wall laminating of baffle, the intercommunication pipeline of good oxygen pond and sedimentation tank is located the top of desilting piece, has evenly seted up the filtration pore on the baffle.
Furthermore, the top of desilting piece sets up the inclined plane, the top of desilting piece be with the one end of baffle laminating.
A mountain rural domestic sewage energy-consumption-free treatment method utilizes the mountain rural domestic sewage energy-consumption-free treatment system and comprises the following treatment steps:
s1, sucking the sewage into the aerobic tank through the siphon pipe after the sewage in the high-level regulating tank reaches a high liquid level, and breaking the siphon when the sewage in the high-level regulating tank reaches a low liquid level;
s2, in the siphoning process, the water level of the high-level regulating tank is gradually reduced until the high-level regulating tank becomes an empty tank, and oxygen is supplied to the combined filler in the high-level regulating tank;
s3, in the siphoning process, because of the liquid level difference between the high-level adjusting tank and the aerobic tank, the water ejector works, air is sucked into the aerobic tank by the air inlet pipe, and the sewage is aerated without energy consumption;
and S4, along with the rise of the water level in the aerobic tank, the sewage treated by the aerobic tank at the top of the aerobic tank flows into the sedimentation tank through a pipeline, and after sludge sedimentation is carried out in the sedimentation tank, the sewage is discharged into the artificial wetland.
Further, the position of the port of the siphon is set so that the liquid level difference between the lowest liquid level of the high-level regulating tank and the highest liquid level of the aerobic tank is between 10 and 25 meters.
Compared with the prior art, the invention has the following beneficial effects:
collecting domestic sewage through a high-level regulating tank, enabling the sewage in the high-level regulating tank to enter an aerobic tank through a siphon pipe after the water level of the high-level regulating tank reaches a siphon water level, automatically sucking air through an air inlet pipe on a water ejector in the process that the sewage flows out of the water ejector through the siphon pipe, carrying out oxygen enrichment on the aerobic tank, improving the activity of microorganisms in the aerobic tank, reducing the generation amount of sludge, enabling the sewage at the top in the aerobic tank to flow into a sedimentation tank through a pipeline after the liquid level in the aerobic tank reaches a certain height, and finally discharging the precipitated sewage into an artificial wetland through the pipeline to realize the treatment of the domestic sewage; rich nutrient substance and impurity in the domestic sewage can be effectually clear away, and whole processing procedure does not involve the input of the energy, and the structure of system is also comparatively simple, low in manufacturing cost to sum up, has realized the effective clearance of no energy consumption of mountain region rural domestic sewage.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the above drawings: 1. a high-level regulating tank; 11. a sewage pipe; 12. a grid; 2. an aerobic tank; 21. a siphon tube; 22. a water ejector; 23. an air inlet pipe; 24. a rotating shaft; 25. an impeller; 26. a screen plate; 3. a sedimentation tank; 31. a partition plate; 32. dredging blocks; 33. pulling a rope; 4. provided is an artificial wetland.
Detailed Description
The technical solution of the present invention is further described with reference to the drawings and the embodiments.
As shown in figure 1, the embodiment of the invention provides a mountain rural domestic sewage energy-consumption-free treatment system, which comprises a high-level regulating tank 1, an aerobic tank 2, a sedimentation tank 3 and an artificial wetland 4 which are sequentially communicated; the high-level regulating reservoir 1 is provided with a sewage pipe 11 for collecting sewage, a siphon 21 for pumping the sewage in the high-level regulating reservoir 1 into the aerobic reservoir 2 is arranged between the high-level regulating reservoir 1 and the aerobic reservoir 2, the end part of the siphon 21 positioned in the aerobic reservoir 2 is connected with a water ejector 22, the top of the water ejector 22 is connected with an air inlet pipe 23 with the top end positioned above the aerobic reservoir 2, and combined fillers are hung in the high-level regulating reservoir 1 and the aerobic reservoir 2.
Is connected with a sewage pipe 11 through a pipeline or a sewage tank, further collects and discharges sewage into a high-level regulating tank 1, after the water level in the high-level regulating tank 1 is increased, when the water level in the high-level regulating tank 1 reaches a siphon water level, the sewage in the high-level regulating tank 1 flows into an aerobic tank 2 through a siphon pipe 21, in the process that the sewage flows out of a water ejector 22, air is sucked through an air inlet pipe 23 through the function of the existing water ejector 22, the air is discharged through the water ejector 22, oxygen enrichment in the aerobic tank 2 is realized, the concentration of microorganisms in the aerobic tank 2 is increased, organic matters in the sewage are decomposed, the generation amount of sludge in the sewage is reduced, along with the siphon process, the water level in the aerobic tank 2 is continuously increased, when the water level in the aerobic tank 2 reaches the height of a pipe orifice of a connecting pipeline between the aerobic tank 2 and a sedimentation tank 3, the sewage at the top of the aerobic tank 2 flows into the sedimentation tank 3 through the pipeline for sedimentation of impurities, finally, after the water level of the sedimentation tank 3 is increased, the sewage which is subjected to sedimentation separation at the top of the sedimentation tank 3 flows into the artificial wetland 4 from the pipeline at the top of the sedimentation tank 3, and the further purified water which is subjected to the artificial wetland 4 can be directly returned to the field, so that the energy-consumption-free treatment of the domestic sewage in the mountainous and rural areas is completed.
The combined filler is suspended in the high-level regulating tank 1 and the aerobic tank 2, the existing combined filler is selected, and the microbial concentration in the high-level regulating tank 1 and the aerobic tank 2 is increased through the combined filler, so that the sludge production is further reduced.
As shown in FIG. 1, in order to avoid the blockage of the siphon 21, a grid 12 is fixedly arranged at the top of the high-level regulating tank 1, the combined filling is suspended at the bottom of the grid 12, and the sewage pipe 11 is positioned above the grid 12. Large-volume dirt flowing out of the sewage pipe 11 is filtered through the grating 12, so that the siphon 21 is prevented from being blocked by the large-volume dirt, the sediment at the bottom of the high-level regulating tank 1 is reduced, and the volume of the high-level regulating tank 1 is maintained; meanwhile, the grating 12 is convenient for installing the combined filler in the high-level adjusting tank 1.
As shown in FIG. 1, to facilitate cleaning of the large volume of dirt filtered out by the grille 12, the grille 12 is curved in an upwardly convex shape. After the large-volume dirt is filtered out by the grating 12, the large-volume dirt automatically rolls on the lower edge of the grating 12 under the washing of the sewage, so that the large-volume dirt is conveniently collected and treated subsequently.
As shown in fig. 1, in order to reduce sludge deposition in the aerobic tank 2, the aerobic tank 2 is cylindrical, a rotating shaft 24 is coaxially and rotatably installed at the bottom of the aerobic tank 2, an impeller 25 and a mesh plate 26 are fixedly connected to the rotating shaft 24, the impeller 25 is located below the mesh plate 26, the water ejector 22 and the impeller 25 are located at the same height, and the output end of the water ejector 22 faces the impeller 25. Air entering from the air inlet pipe 23 is discharged from the output end of the water ejector 22, sewage and air discharged from the output end of the water ejector 22 impact the impeller 25, so that the impeller 25 rotates, the impeller 25 rotates through the rotating shaft 24, meanwhile, the screen plate 26 is driven to rotate, the rotation of the impeller 25 enables the sewage at the bottom in the aerobic tank 2 to uniformly flow, and sludge deposition at the bottom of the aerobic tank 2 is reduced; meanwhile, air entering the aerobic tank 2 flows upwards, when the air passes through the rotating screen plate 26, the screen plate 26 separates large air mass, the surface area of the air is increased, so that the combined filler hung on the side wall of the aerobic tank 2 is fully contacted with the air, the concentration of microorganisms in the aerobic tank 2 is comprehensively improved, and the generation amount of sludge in the aerobic tank 2 is reduced.
As shown in figure 1, in order to reduce the influence of sludge sedimentation on the flexibility of the rotation of the rotating shaft 24, the middle part of the bottom of the aerobic tank 2 is convex upwards. After the middle part of the bottom of the aerobic tank 2 protrudes upwards, under the rotation of the impeller 25, the sediment at the bottom of the aerobic tank 2 can be accumulated to the edge of the bottom of the aerobic tank 2, and the sludge sediment is prevented from being accumulated on the mounting seat of the rotating shaft 24.
As a preferred embodiment of the present invention, in order to ensure that the sewage output from the water ejector 22 can effectively push the impeller 25 to rotate, the axis of the water ejector 22 is not on the same plane with the axis of the impeller 25. The water ejector 22 is prevented from outputting to the axis of the impeller 25, so that the impeller 25 is stressed in balance and cannot rotate.
As shown in figure 1, for the efficient mud sediment in the recovery sedimentation tank 3, the vertical baffle 31 that is provided with in the sedimentation tank 3, be provided with the desilting piece 32 that connects and promote through stay cord 33 in the sedimentation tank 3, the lateral wall of desilting piece 32 with the inner wall of sedimentation tank 3 and the lateral wall laminating of baffle 31, the communicating pipe of good oxygen pond 2 and sedimentation tank 3 is located the top of desilting piece 32, has evenly seted up the filtration pore on the baffle 31. After the sewage enters the sedimentation tank 3, the sewage passes through the filtering holes formed in the partition plate 31, and sludge sediment in the sewage cannot run through the filtering holes in the partition plate 31, so that the sediment is accumulated on one side of the partition plate 31; in the anti-blocking of the partition plate 31, the dredging block 32 is pulled up manually and periodically through the pull rope 33, the side wall of the dredging block 32 is attached to the side wall of the partition plate 31, and then sludge sediment blocked on the side wall of the partition plate 31 is scraped; simultaneously, behind dredging block 32 stay cord to top surface and 3 top surfaces parallel and level of sedimentation tank, can strike off the mud sediment in the sedimentation tank 3, keep sedimentation tank 3's water storage capacity and filtration efficiency.
As shown in figure 1, in order to further facilitate the cleaning of the sludge deposit on the dredging block 32, the top of the dredging block 32 is provided with an inclined surface, and the highest end of the dredging block 32 is one end attached to the partition plate 31. After the dredging block 32 is lifted, the sludge can flow out of the sedimentation tank 3 from the dredging block 32 conveniently due to the arrangement of the top slope of the dredging block 32.
As shown in figure 1, in order to realize the energy-free domestic sewage treatment, the invention provides a mountain rural domestic sewage energy-free treatment method, and the treatment method utilizes the mountain rural domestic sewage energy-free treatment system and comprises the following treatment steps:
s1, sucking the sewage into the aerobic tank 2 through the siphon pipe 21 after the sewage in the high-level regulating tank 1 reaches a high liquid level, and breaking the siphon when the sewage in the high-level regulating tank 1 reaches a low liquid level;
s2, in the siphoning process, the water level of the high-level regulating tank 1 is gradually reduced until the high-level regulating tank becomes an empty tank, and oxygen is supplied to the combined filler in the high-level regulating tank 1;
s3, in the siphoning process, because of the liquid level difference between the high-level regulating tank 1 and the aerobic tank 2, the water ejector 22 works, air is sucked into the aerobic tank 2 through the air inlet pipe 23, and the sewage is subjected to energy-consumption-free aeration;
and S4, along with the rise of the water level in the aerobic tank 2, the sewage treated by the aerobic tank 2 at the top of the aerobic tank 2 flows into the sedimentation tank 3 through a pipeline, and after sludge sedimentation is carried out in the sedimentation tank 3, the sewage is discharged into the artificial wetland 4.
Utilize the siphon principle, with the unpowered transport of sewage in high-order equalizing basin 1 to in good oxygen pond 2, in the in-process that sewage was transported, carry out the aeration through water ejector 22 in good oxygen pond 2, increase the microorganism concentration in good oxygen pond 2, reduce mud production volume, along with the rising of the interior water level of good oxygen pond 2, carry out the deposit of mud in leading-in sedimentation tank 3 through the pipeline with the sewage at good oxygen pond 2 top, at last with leading-in constructed wetland of the supernatant in the sedimentation tank 3, accomplish the no energy consumption of domestic sewage and handle.
Preferably, in order to ensure that the sewage in the high-level regulating tank 1 can be siphoned into the aerobic tank 2, the position of the port of the siphon 21 is set so that the difference between the lowest liquid level of the high-level regulating tank 1 and the highest liquid level of the aerobic tank 2 is between 10 and 25 meters. Through the arrangement of the port of the siphon pipe 21 and the cooperation of the existing water ejector 22, air which is 3-5 times of the volume of sewage can be sucked, so that the steam-water ratio is 3-5: 1, further fully increasing the concentration of microorganisms in the aerobic tank 2 and improving the capability of decomposing organic matters.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. A mountain rural domestic sewage does not have energy consumption processing system which characterized in that: comprises a high-level regulating tank (1), an aerobic tank (2), a sedimentation tank (3) and an artificial wetland (4) which are communicated in sequence; the sewage pipe (11) for collecting sewage is arranged on the high-level adjusting tank (1), a siphon (21) capable of pumping the sewage in the high-level adjusting tank (1) into the aerobic tank (2) is arranged between the high-level adjusting tank (1) and the aerobic tank (2), the end part of the siphon (21) located in the aerobic tank (2) is connected with a water ejector (22), the top of the water ejector (22) is connected with an air inlet pipe (23) with the top end located above the aerobic tank (2), and combined fillers are hung in the high-level adjusting tank (1) and the aerobic tank (2).
2. The mountain rural domestic sewage energy consumption-free treatment system of claim 1, wherein: the upper adjusting tank (1) is characterized in that a grid (12) is fixedly arranged at the inner top of the upper adjusting tank, the combined filler is suspended at the bottom of the grid (12), and the sewage pipe (11) is positioned above the grid (12).
3. The mountain rural domestic sewage energy-consumption-free treatment system of claim 2, wherein: the grating (12) is in an arc shape protruding upwards.
4. The mountain rural domestic sewage energy consumption-free treatment system of claim 1, wherein: the aerobic tank (2) is cylindrical, a rotating shaft (24) is installed at the bottom of the aerobic tank (2) in a coaxial rotating mode, an impeller (25) and a screen plate (26) are fixedly connected to the rotating shaft (24), the impeller (25) is located below the screen plate (26), and the water ejector (22) and the impeller (25) are located at the same height and the output end of the water ejector (22) faces the impeller (25).
5. The mountain rural domestic sewage energy consumption-free treatment system of claim 4, wherein: the middle part of the bottom of the aerobic tank (2) is raised upwards.
6. The mountain rural domestic sewage energy consumption-free treatment system of claim 4, wherein: the axis of the water ejector (22) and the axis of the impeller (25) are not on the same plane.
7. The mountain rural domestic sewage energy consumption-free treatment system of claim 1, wherein: the vertical baffle (31) that is provided with in sedimentation tank (3), be provided with in sedimentation tank (3) and connect and the desilting piece (32) that promote through stay cord (33), the lateral wall of desilting piece (32) with the inner wall of sedimentation tank (3) and the lateral wall laminating of baffle (31), the intercommunication pipeline of good oxygen pond (2) and sedimentation tank (3) is located the top of desilting piece (32), has evenly seted up the filtration pore on baffle (31).
8. The mountain rural domestic sewage energy consumption-free treatment system of claim 7, wherein: the top of desilting piece (32) sets up the inclined plane, the highest end of desilting piece (32) be with the one end of baffle (31) laminating.
9. A mountain rural domestic sewage energy consumption-free treatment method is characterized by comprising the following steps: the mountain rural domestic sewage energy-consumption-free treatment system as claimed in claim 1, wherein the treatment steps are as follows:
s1, after the sewage in the high-level adjusting tank (1) reaches a high liquid level, sucking the sewage into the aerobic tank (2) through the siphon pipe (21), and when the sewage in the high-level adjusting tank (1) reaches a low liquid level, breaking the siphon;
s2, in the siphoning process, the water level of the high-level regulating tank (1) is gradually reduced until the high-level regulating tank becomes an empty tank, and oxygen is added to the combined filler in the high-level regulating tank (1);
s3, in the siphoning process, because of the liquid level difference between the high-level adjusting tank (1) and the aerobic tank (2), the water ejector (22) works, and air is sucked into the aerobic tank (2) by the air inlet pipe (23) to carry out energy-consumption-free aeration of sewage;
s4, along with the rise of the water level in the aerobic tank (2), the sewage treated by the aerobic tank (2) at the top of the aerobic tank (2) flows into the sedimentation tank (3) through a pipeline, and after sludge sedimentation is carried out in the sedimentation tank (3), the sewage is discharged into the artificial wetland (4).
10. The mountain rural domestic sewage energy consumption-free treatment method of claim 9, characterized in that: the port position of the siphon (21) is set so that the liquid level difference between the lowest liquid level of the high-level adjusting tank (1) and the highest liquid level of the aerobic tank (2) is between 10 and 25 meters.
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