CN108640415B - Efficient backwashing artificial ecological sewage land treatment system - Google Patents
Efficient backwashing artificial ecological sewage land treatment system Download PDFInfo
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- CN108640415B CN108640415B CN201810405129.9A CN201810405129A CN108640415B CN 108640415 B CN108640415 B CN 108640415B CN 201810405129 A CN201810405129 A CN 201810405129A CN 108640415 B CN108640415 B CN 108640415B
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- 239000010865 sewage Substances 0.000 title claims abstract description 44
- 238000011001 backwashing Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000010802 sludge Substances 0.000 claims abstract description 66
- 238000011010 flushing procedure Methods 0.000 claims abstract description 58
- 238000004062 sedimentation Methods 0.000 claims abstract description 23
- 239000000945 filler Substances 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 11
- 239000002689 soil Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims description 15
- 238000012856 packing Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
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- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- 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
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention discloses a high-efficiency backwashing artificial ecological sewage land treatment system which comprises a tank body, wherein impervious films are paved on the periphery and the bottom of the tank body, and the tank body is respectively provided with an anaerobic zone, an aerobic zone and a sedimentation zone from left to right. The anaerobic zone and the aerobic zone are respectively a sand layer, a supporting layer, a filler layer, a gas collecting layer and a soil layer from bottom to top, and the sedimentation zone is respectively a sand layer, a sludge layer, a mud-water separating layer, a gas collecting layer and a soil layer from bottom to top. The anaerobic zone, the aerobic zone and the sedimentation zone are respectively provided with a plurality of air pipes and a sludge discharge branch pipe, the air outlet holes of the air pipes are positioned at the bottom of the filler layer or the bottom of the sludge layer, the sludge discharge branch pipe is positioned below the liquid level of the tank body, a plurality of sludge discharge holes are formed in the pipe wall, and the sludge discharge branch pipe is connected with a vacuum device or a valve. Compared with the existing filtering system, the invention has the advantages that no external clear water back flushing is needed, and a back flushing water pump, a separate flushing pipeline and a valve are not needed. The system has the characteristics of simple equipment, convenient management, low manufacturing cost, low energy consumption and low operation cost.
Description
Technical Field
The invention relates to a sewage treatment system, in particular to a high-efficiency backwash artificial ecological sewage land treatment system, and belongs to the technical field of environmental protection.
Background
The sewage land treatment system has the advantages of investment saving, simple operation management, stable treatment effect and dispersible treatment, and is very suitable for sewage treatment in small towns. With the extension of the running time, after the running time exceeds a certain running time, the problems of water yield reduction, head loss increase, poor treatment effect and system blockage of the system can occur due to accumulation of inorganic suspended matters of the interception and filtration, aging and falling of biological films and the like. The system must be periodically backwashed to remove suspended matter therefrom to restore the treated water volume and the treatment effect. The advantages and disadvantages of the backwash effect of the sewage land treatment system relate to the operation effect and stability of the system.
The traditional air-water combined back flushing mode has the following defects:
(1) The back flushing device is provided with a high-power water pump, an independent flushing air pipe, a water distribution pipe and a valve, so that the cost is high;
(2) The gravity pressure difference needs to be overcome when the backwash water passes through the filter layer from bottom to top, so that the energy consumption is high;
(3) During back flushing, a large amount of clean water is required to be introduced from outside the system, so that a large amount of clean water is consumed;
(4) The valve needs to be switched, and the operation is complex.
The Chinese patent with publication number of CN 103449665A discloses a sewage land biological precipitation filtration system for mud-water separation, which realizes good mud-water separation and solid suspended matter removal effects by organically combining biological adsorption, mechanical screening and microprecipitation separation technologies, and improves the quality of effluent. However, it still needs to be provided with a back flushing device, and the back flushing is carried out by adopting an enhanced air-water combined back flushing method, or the back flushing is carried out by adopting water or air alone.
Disclosure of Invention
Aiming at the defects and shortcomings of the traditional technology, the invention aims to provide an artificial ecological sewage land treatment system which does not need external clear water back flushing, a back flushing water pump, an independent flushing pipeline and a valve and is used for back flushing in a sequential section.
The technical scheme of the invention is as follows: the underground anti-seepage device comprises a tank body excavated under the ground, wherein impermeable films are paved on the periphery and the bottom of the tank body, the tank body is respectively an anaerobic zone, an aerobic zone and a sedimentation zone from left to right, the anaerobic zone and the aerobic zone are sequentially filled with a sand layer, a supporting layer, a packing layer, a gas collecting layer and a soil layer from bottom to top, and the sedimentation zone is sequentially filled with the sand layer, the sludge layer, a muddy water separation layer, the gas collecting layer and the soil layer from bottom to top. The two sides of the tank body are respectively provided with a water inlet and a water outlet; an air pipe and a sludge discharge branch pipe are also arranged in the tank body, an air outlet of the air pipe is positioned at the bottom of the filler layer or the bottom of the sludge layer, and the sludge discharge branch pipe is positioned below the surface of the tank body fluid; the highest liquid level of the tank body is positioned at the bottom of the gas collecting layer.
The anaerobic zone, the aerobic zone and the sedimentation zone are respectively provided with a plurality of air pipes and mud discharge branch pipes which are independently controlled.
One end of the air pipe is connected with an external blower of the system, and the middle of the air pipe is connected with an air pipe valve.
The pipe wall of the sludge discharge branch pipe is provided with a plurality of sludge discharge holes, the water outlet of the sludge discharge branch pipe is provided with a vacuum device, and the vacuum device extends upwards to extend out of the tank body at the gas collecting layer, or the water outlet of the sludge discharge branch pipe is provided with a sludge discharge branch pipe valve, and the sludge discharge branch pipe extends out of the tank body.
One end of the sewage return pipe is positioned at the tail end of the aerobic zone in the filler layer, and the other end of the sewage return pipe is connected with the water inlet.
The supporting layer, the packing layer, the sludge layer, the mud-water separation layer and the gas collecting layer are all filled with packing, and the packing is cobble or other granular packing; the particle size of the filler of the bearing layer and the sludge layer is 20-80mm, the particle size of the filler layer and the sludge-water separation layer is 10-60mm, and the particle size of the filler of the gas collecting layer is 20-80mm.
When the accumulation of sludge in the system reaches a certain amount, the water inlet and the water outlet are not required to be closed, the air flow of the back flushing section is adjusted to the back flushing air flow, and one or more sections of the anaerobic zone, the aerobic zone or the sedimentation zone of the system are subjected to air-water combined back flushing. Only the vacuum device or the valve of the sludge discharge branch pipe is required to be opened, the filter material gap water in the non-flushing area around the air and the system is utilized to backwash the filler layer, the sludge layer and the mud-water separation layer, and the sludge is discharged out of the sewage land treatment system through the sludge discharge branch pipe. And after the back flushing in the interval is finished, closing a mud discharge branch pipe valve or destroying a mud discharge siphon to stop mud discharge. And if the back flushing interval is in the anaerobic area or the sedimentation area, closing the air pipe valve. If the back flushing zone is in the aerobic zone, the air flow is regulated down to the amount of air required for oxygen supply. The back flushing process is finished in the interval, the biological filtration or sediment filtration working mode is entered, the system carries out back flushing in the next interval, and the back flushing operation in the sequential interval is completed.
The duration of the air back flushing is generally 1-10 minutes, and the air flushing strength is 4-22L/m 2 S, the water flushing strength is 2-10L/m 2 S. The air back flushing can improve the back flushing effect, has the oxygenation function, is beneficial to the aerobic degradation and purification of the microorganism on pollutants in the sewage, and improves the water quality of the effluent.
The invention has the following advantages:
1. compared with the traditional back flushing mode, the method directly uses the filter material gap water in the peripheral non-flushing area as back flushing water, does not need to introduce external clear water, and saves flushing water quantity;
2. the difference between the internal water head and the external water head of the filter tank is directly used as back flushing power, a back flushing water pump, an independent flushing pipeline and a valve are not needed, and the operation is simple;
3. air back flushing is utilized, so that the back flushing effect is improved;
4. the mud discharging branch pipe controls mud discharging by using a vacuum device or a valve on the siphon device;
5. compared with the existing filtering back flushing system, the device is simple, convenient to operate, low in cost, low in energy consumption and low in running cost.
Drawings
Fig. 1 is a schematic view showing the external structure of embodiments 1 and 2 of the present invention.
FIG. 2 is a schematic A-A section view of an anaerobic zone and an aerobic zone according to embodiment 1 of the present invention.
FIG. 3 is a schematic A-A section view of an anaerobic zone and an aerobic zone according to embodiment 2 of the present invention.
FIG. 4 is a schematic B-B section of the settling zone of embodiment 1 of the present invention.
FIG. 5 is a schematic B-B section view of the precipitation zone of embodiment 2 of the present invention.
Wherein, 1, a groove body 2 and a sand layer; 3. a support layer; 4. a filler layer; 5. a sludge layer; 6. separating mud and water; 7. A gas collecting layer; 8. a soil layer; 9. a gas collecting tube; 10. a mud discharging branch pipe; 11. a vacuum device; 12. a water pump; 13. a mud discharge branch pipe valve; 14. an air tube; 15. a blower; 16. an air pipe valve; 17. an impermeable membrane; 18. a water inlet; 19. a water outlet; 20. an anaerobic zone; 21. an aerobic zone; 22. a precipitation zone; 23. a sewage return pipe; 24. a mud well; 25. a mud discharging dry pipe.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.
Example 1:
as shown in fig. 1, 2 and 4, the embodiment comprises a tank body 1 which is excavated below the ground, and impermeable films 17 are paved on the periphery and the bottom. The tank body 1 is respectively provided with an anaerobic zone 20, an aerobic zone 21 and a sedimentation zone 22 from left to right. The anaerobic zone 20 and the aerobic zone 21 are sequentially filled with a sand layer 2, a supporting layer 3, a filler layer 4, a gas collecting layer 7 and a soil layer 8 from bottom to top. The sedimentation zone 22 is filled with a sand layer 2, a sludge layer 5, a mud-water separation layer 6, a gas collecting layer 7 and a soil layer 8 from bottom to top. The water inlet 18 and the water outlet 19 are respectively positioned at two sides of the tank body 1. The anaerobic zone 20, the aerobic zone 21 and the sedimentation zone 22 are respectively provided with a plurality of air pipes 14 and a sludge discharge branch pipe 10 which are independently controlled, wherein the air outlet holes of the air pipes 14 are positioned at the bottom of the packing layer 4 or the bottom of the sludge layer 5, and the other ends of the air pipes 14 are connected with an external blower 15. The mud discharging branch pipe 10 is positioned on the supporting layer 3 or the packing layer 4 below the liquid level, a plurality of mud discharging holes are arranged on the pipe wall, and the mud discharging branch pipe 10 is connected with the vacuum device 11, namely a water injector and is bent upwards to extend out of the tank body 1. The highest liquid level of the tank body 1 is positioned at the bottom of the gas collecting layer 7. The tank body 1 is provided with a sewage return pipe 23, one end of the sewage return pipe 23 is positioned at the tail end of the aerobic zone 21 in the filler layer 4, and the other end is connected with the water inlet 18.
Example 2:
as shown in fig. 1, 3 and 5, the embodiment comprises a tank body 1 which is excavated below the ground, and impermeable films 17 are paved on the periphery and the bottom. The tank body 1 is respectively provided with an anaerobic zone 20, an aerobic zone 21 and a sedimentation zone 22 from left to right. The anaerobic zone 20 and the aerobic zone 21 are sequentially filled with a sand layer 2, a supporting layer 3, a filler layer 4, a gas collecting layer 7 and a soil layer 8 from bottom to top. The sedimentation zone 22 is filled with a sand layer 2, a sludge layer 5, a mud-water separation layer 6, a gas collecting layer 7 and a soil layer 8 from bottom to top. The water inlet 18 and the water outlet 19 are respectively positioned at two sides of the tank body 1. The anaerobic zone 20, the aerobic zone 21 and the sedimentation zone 22 are all provided with a plurality of independent control air pipes 14 and sludge discharge branch pipes 10, wherein the air outlet holes of the air pipes 14 are positioned at the bottom of the packing layer 4 or the bottom of the sludge layer 5, and the other ends of the air pipes 14 are connected with an external blower 15. The sludge discharge branch pipe 10 is positioned in the sludge layer 5 or the sludge-water separation layer 6 below the liquid level, a plurality of sludge discharge holes are formed in the pipe wall, and the sludge discharge branch pipe 10 is directly connected with the sludge discharge branch pipe valve 13 and extends out of the tank body 1. The highest liquid level of the tank body 1 is positioned at the bottom of the gas collecting layer 7. The tank body 1 is provided with a sewage return pipe 23, one end of the sewage return pipe 23 is positioned at the tail end of the aerobic zone 21 in the filler layer 4, and the other end is connected with the water inlet 18.
The sewage treatment process of the device of the invention comprises the following specific steps:
the sewage to be treated enters the sewage land treatment system and sequentially passes through the anaerobic zone 20, the aerobic zone 21 and the sedimentation zone 22 from left to right. Each zone is divided into a plurality of working areas, each area is divided into two states of working and back flushing, and in the working state, the air pipe valves 16 of the anaerobic zone and the sedimentation zone are closed, and only the aerobic zone is used for blasting aeration and oxygen supply. The sewage is subjected to anaerobic biological filtration treatment in the anaerobic zone 20 to degrade organic matters in the sewage, and simultaneously, nitrate nitrogen and nitrite nitrogen in the sewage returned from the aerobic zone 21 are subjected to denitrification. Then, the sewage enters an aerobic zone 21 for aerobic biological filtration treatment, microorganisms attached to a filler layer 4 perform aerobic reaction in the layer, mainly oxidative decomposition of nitrogen-containing compounds and organic matters, and at the end of the aerobic zone 21, part of the sewage flows back to an anaerobic zone 20 through a sewage return pipe 23 under the control of a water pump 12. When the sewage enters the rightmost sedimentation zone 22, the falling biological film in the sewage is cut off and removed by the filtration sedimentation of the zone, and the treated water finally exits the sewage land treatment system through the water outlet 19. The waste gas and compressed air generated in the operation process are collected by a gas collecting pipe 9 in a gas collecting layer 7 and discharged out of the sewage land treatment system, and the gas is directly or after being collected and intensively treated and then discharged into the atmosphere. In the filtration treatment process of the system, the sewage is continuously accumulated in the filler layer 4, the sludge layer 5 and the mud-water separation layer 6 by the sludge and the biological film.
In the running process, when the accumulated sludge in the system reaches a certain amount, interval backwashing operation is carried out. The blower 15 is started to adjust the air flow rate of the back flushing section to the back flushing air flow rate, and one or more sections of the anaerobic zone 20, the aerobic zone 21 or the sedimentation zone 22 of the system are subjected to air-water combined back flushing. Only the vacuum device 11 or the sludge discharge branch pipe valve 13 is required to be opened, and the filter material gap water in the peripheral non-flushing area is utilized to perform air-water combined backwashing on the filler layer 4, the sludge layer 5 and the sludge-water separation layer 6, so that external clear water is not required to be introduced, and water is saved. The combined back flushing of air and water can improve the back flushing effect, not only solve the blocking problem of the filler layer 4, the sludge layer 5 and the mud-water separating layer 6, but also update the biological membrane of the filler layer 4, recover the degradation and purification capability of microorganisms on pollutants in sewage and improve the water quality of the effluent. The water inlet 18 and the water outlet 19 are not required to be closed in the backwashing process, if the vacuum device 11 is arranged on the water outlet of the sludge discharge branch pipe 10, the vacuum device 11 is opened, negative pressure is generated in the pipe, sludge enters the sludge discharge branch pipe 10 through the sludge discharge hole, is discharged to the sludge discharge well 24 under the action of siphonage, and is discharged into a sludge recovery tank through the sludge discharge dry pipe 25. If a valve is arranged on the water outlet of the sludge discharge branch pipe 10, the sludge discharge branch pipe valve 13 is opened, and sludge enters the sludge discharge branch pipe 10 through a sludge discharge hole and is discharged into a sludge recovery tank through a sludge discharge dry pipe 25. The back flushing can be carried out by independently adopting water or air.
And after the back flushing in the interval is finished, the valve 13 of the sludge discharge branch pipe is closed or the sludge discharge siphon is broken to stop sludge discharge. While if the backwash interval is in the anaerobic zone 20 or the sedimentation zone 22 the air line valve 16 is closed. If the back flushing zone is in the aerobic zone 21, the air flow is adjusted to the air quantity required for oxygen supply. The back flushing process is finished in the interval, the biological filtration or sediment filtration working mode is entered, the system carries out back flushing in the next interval, and the back flushing operation in the sequential interval is completed.
The foregoing is a preferred embodiment of the present invention and is not intended to limit the scope of the invention. It should be noted that modifications and adaptations to the invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the invention.
Claims (6)
1. An efficient backwashing artificial ecological sewage land treatment system comprises a tank body (1), wherein impervious films (17) are paved on the periphery and the bottom of the tank body (1), and the tank body (1) is respectively provided with an anaerobic zone (20), an aerobic zone (21) and a sedimentation zone (22) from left to right; the anaerobic zone (20) and the aerobic zone (21) are sequentially filled with a sand layer (2), a supporting layer (3), a packing layer (4), a gas collecting layer (7) and a soil layer (8) from bottom to top; the sedimentation zone (22) is sequentially filled with a sand layer (2), a sludge layer (5), a mud-water separation layer (6), a gas collection layer (7) and a soil layer (8) from bottom to top; a water inlet (18) and a water outlet (19) are respectively arranged at two sides of the tank body (1); the device is characterized in that an air pipe (14) and a mud discharging branch pipe (10) are also arranged in the tank body (1); the air outlet of the air pipe (14) is positioned at the bottom of the filler layer (4) or the bottom of the sludge layer (5); the sludge discharge branch pipe (10) is positioned in a supporting layer (3) or a packing layer (4), a sludge layer (5) or a sludge-water separation layer (6) below the liquid level of the tank body (1); a vacuum device (11) or a mud discharging branch pipe valve (13) is arranged on the water outlet of the mud discharging branch pipe (10); the anaerobic zone (20), the aerobic zone (21) and the sedimentation zone (22) are respectively provided with a plurality of independently controlled air pipes (14) and sludge discharge branch pipes (10); the pipe wall of the mud discharging branch pipe (10) is provided with a plurality of mud discharging holes; and opening a vacuum device (11) or a mud discharge branch pipe valve (13), back flushing the packing layer (4), the sludge layer (5) and the mud-water separation layer (6) by utilizing air and filter material gap water in a non-flushing area around the system, directly utilizing the difference between the water heads inside and outside the filter as back flushing power, and discharging the sludge out of the sewage land treatment system through the mud discharge branch pipe (10) without a back flushing water pump, an independent flushing pipeline and a valve.
2. The efficient backwashing artificial ecological sewage land treatment system according to claim 1 is characterized in that the tank body (1) is provided with a sewage return pipe (23), one end of the sewage return pipe is positioned at the tail end of an aerobic zone (21) in the packing layer (4), and the other end of the sewage return pipe is connected with the water inlet (18).
3. The efficient backwash artificial ecological sewage land treatment system according to claim 1 is characterized in that the highest liquid level of the tank body (1) is positioned at the bottom of the gas collecting layer (7).
4. The efficient backwash artificial ecological sewage land treatment system as claimed in claim 1, wherein one end of the air pipe (14) is connected with an external blower (15).
5. The efficient backwash artificial ecological sewage land treatment system according to claim 1, wherein: the supporting layer (3), the packing layer (4), the sludge layer (5), the mud-water separating layer (6) and the gas collecting layer (7) are filled with packing.
6. The efficient backwash artificial ecological sewage land treatment system according to claim 5, wherein: the filler is stone or other granular fillers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810405129.9A CN108640415B (en) | 2018-04-28 | 2018-04-28 | Efficient backwashing artificial ecological sewage land treatment system |
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| CN201810405129.9A CN108640415B (en) | 2018-04-28 | 2018-04-28 | Efficient backwashing artificial ecological sewage land treatment system |
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| CN108640415A CN108640415A (en) | 2018-10-12 |
| CN108640415B true CN108640415B (en) | 2024-04-05 |
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| CN101343115A (en) * | 2008-09-01 | 2009-01-14 | 海南大学 | Unpowered bio-filter water purifying system with oxygenation and backwash functions |
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| CN102001743A (en) * | 2010-09-30 | 2011-04-06 | 青岛理工新环境技术开发有限公司 | Sewage aerobic land treatment system |
| CN103449665A (en) * | 2013-08-16 | 2013-12-18 | 青岛理工新环境技术开发有限公司 | Land biological precipitation and filtering system for muddy water separation of sewage |
| CN106830320A (en) * | 2017-02-27 | 2017-06-13 | 兰州理工大学 | A kind of method of integrated form biological bed and treatment rural scattered domestic sewage |
| CN107055871A (en) * | 2017-05-03 | 2017-08-18 | 北京师范大学 | A kind of new coagulating sedimentation retention filtering air-water backwashing integrated high-efficiency filter tank |
| CN207091242U (en) * | 2017-08-09 | 2018-03-13 | 上海市净化技术装备成套有限公司 | A kind of Integral biological filtering pool suitable for middle or small sewage treatment |
| CN208378667U (en) * | 2018-04-28 | 2019-01-15 | 青岛理工大学 | A kind of efficiently backwash artificial ecology waste water soil treatment system |
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