CN217265318U - Small-size rural domestic sewage treatment device - Google Patents
Small-size rural domestic sewage treatment device Download PDFInfo
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- CN217265318U CN217265318U CN202220591245.6U CN202220591245U CN217265318U CN 217265318 U CN217265318 U CN 217265318U CN 202220591245 U CN202220591245 U CN 202220591245U CN 217265318 U CN217265318 U CN 217265318U
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- 239000010865 sewage Substances 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 103
- 239000010802 sludge Substances 0.000 claims abstract description 79
- 238000004062 sedimentation Methods 0.000 claims abstract description 52
- 238000005192 partition Methods 0.000 claims abstract description 33
- 238000005273 aeration Methods 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 29
- 239000000945 filler Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000001546 nitrifying effect Effects 0.000 claims abstract description 11
- 238000001556 precipitation Methods 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims description 7
- 206010021143 Hypoxia Diseases 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 244000005700 microbiome Species 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 239000002893 slag Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 2
- 230000009603 aerobic growth Effects 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
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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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- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model relates to the field of rural domestic sewage treatment, and discloses a small rural domestic sewage treatment device, which comprises a shell, wherein the structure in the shell comprises an oil separation and residue precipitation tank, an anoxic tank, an aerobic tank and a sedimentation tank which are separated by a partition plate side by side, the shell is provided with an air inlet pipe, a sludge discharge pipe, an inlet pipe and an outlet pipe, the sludge discharge pipe and the outlet pipe are arranged in the sedimentation tank, the air inlet pipe comprises an aerobic tank aeration main pipe communicated with the aerobic tank, an anoxic tank aeration main pipe communicated with the anoxic tank, an air stripping and sludge discharge inlet pipe communicated with the sedimentation tank, a nitrifying liquid air stripping and backflow inlet pipe communicated with the aerobic tank, and active fillers are filled in the aerobic tank; the partition plate is provided with water through holes; the anoxic pond is provided with a diversion trench; the sludge discharge pipe comprises a sludge return pipe communicated with the anoxic pond diversion trench and a sludge discharge pipe with a sedimentation pond end extending out of the shell. This scheme pond holds high-usage, and the treatment effect is good: no underwater electromechanical equipment is arranged in the shell, and the operation and maintenance are convenient.
Description
Technical Field
The utility model relates to a rural domestic sewage treatment field especially relates to a small-size rural domestic sewage treatment plant.
Background
With the gradual maturity of rural domestic sewage treatment technology, the sewage treatment effect has become the focus of industrial attention. Rural domestic sewage treatment complete sets have various brands, widely adopt the combination technology of activated sludge and contact oxidation, and the main process units are anaerobic/anoxic, aerobic and sedimentation. Although the main body processes adopted by the present rural domestic sewage treatment complete equipment are basically the same, most of the equipment is small, so that the problems of water power and stirring of an anaerobic pool or an anoxic pool and sludge discharge of a sedimentation pool are easily ignored, the utilization rate of the tank volume is low, and the treatment effect is poor.
The invention discloses a buried micro-power purification tank sewage treatment device which comprises an oil separation tank, a facultative tank, an aerobic tank and a sedimentation tank, wherein the oil separation tank is arranged to control floating oil in a certain water surface area, so that subsequent cleaning and sludge suction are facilitated, but an oil collecting pipe is not arranged, and the floating oil cannot be continuously removed; the facultative tank is provided with the flow guide pipe, so that the dead water area of the facultative tank is reduced to a certain extent, but the dead water area still exists because the middle part is fed with water and the middle part is discharged with water, and the tank capacity is not fully utilized; the sedimentation tank is not provided with the mud sliding plate, sludge only flows back, and a mud discharging pipe is not arranged, so that the sludge discharging of the sedimentation tank is insufficient, and residual sludge does not go out, so that the system volume is occupied, and the sewage treatment effect is poor.
Disclosure of Invention
In order to solve the problem, the utility model provides a small-size rural domestic sewage treatment device, have the pond and hold the high-usage, advantage such as sewage treatment is effectual.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a small-sized rural domestic sewage treatment device comprises a shell, wherein the shell internally comprises an oil separation and sediment tank, an anoxic tank, an aerobic tank and a sedimentation tank which are separated side by using a partition plate, the shell is provided with an air inlet pipe, a sludge discharge pipe, a water inlet pipe and a water outlet pipe, and the sludge discharge pipe and the water outlet pipe are arranged in the sedimentation tank; the partition plate is provided with water through holes; the anoxic pond is provided with a diversion trench; the sludge discharge pipe comprises a sludge return pipe communicated with the anoxic pond diversion trench and a sludge discharge pipe with a sedimentation pond end extending out of the shell.
When the pretreated sewage flows into the shell, oil substances and large-particle impurities are removed through the oil separation and slag precipitation tank in sequence, then organic pollutants, phosphorus and ammonia nitrogen are removed through the aerobic tank, nitrifying liquid flowing back from the aerobic tank contains dissolved oxygen, the anoxic tank is in an anoxic environment, denitrifying bacteria carry out denitrification reaction under the anoxic condition, so that total nitrogen is removed, and finally the sewage is subjected to sludge-water separation through the precipitation tank, so that suspended matters are removed, and the aim of purifying the sewage is fulfilled. The aeration of the aerobic tank provides an aerobic growth environment for microorganisms, the micro aeration of the anoxic tank plays a role in stirring, the utilization rate of the tank volume is improved, sludge is discharged by air stripping, backflow and nitrification liquid air stripping backflow are realized, a power device is omitted, and the energy consumption of maintenance work and operation is reduced. Through the design of the shape and the position of the water outlet of the partition plate, the water flow control can be realized by combining the diversion trench, the aeration pipe and the like, the water body is stirred, the problem of dead water in the pool is solved, the utilization rate of the volume of the pool is improved, and the sewage treatment effect is improved. A third clapboard is arranged between the aerobic tank and the sedimentation tank, and a water hole is arranged at the upper part of the third clapboard and used for the sewage in the aerobic tank to enter the sedimentation tank. The baffle plate of the anoxic tank and the aerobic tank can be movable, and the position of the baffle plate can be adjusted according to the water quality of the inlet water, so that the volumes of the anoxic tank and the aerobic tank are adjusted, and the water quality of the outlet water is guaranteed. Each pipeline is provided with an independent valve, a sludge return pipe returns to the diversion trench of the anoxic pond, a sludge discharge pipe extends out of one side of the shell to be connected with an external sludge storage device, residual sludge is discharged out of the shell through a sludge discharge pipe, and floating oil and residual sludge are timely discharged, so that the occupation of the pond capacity can be avoided, and in addition, the timely discharge of the residual sludge is beneficial to maintaining the normal operation of the system.
Preferably, the partition plates comprise a first partition plate arranged between the oil removal dreg sedimentation tank and the anoxic tank, a second partition plate arranged between the anoxic tank and the aerobic tank, and a third partition plate arranged between the aerobic tank and the sedimentation tank; the upper part of the first clapboard is provided with a first water through hole, and the slag trap covers the first water through hole on the first clapboard; a second water through hole is formed in the horizontal center line of the second partition plate; a third water through hole is formed in the upper part of the third partition plate; the horizontal position of the first water through hole is higher than that of the second water through hole, and the horizontal position of the second water through hole is higher than that of the third water through hole; one end of the first water through hole, which is close to the anoxic pond, is provided with a diversion trench, and the diversion trench leads to the bottom of the anoxic pond; and flow deflectors are arranged on the water outlet sides of the second water passing hole and the third water passing hole.
Because the baffle is thinner, the effect of water conservancy diversion piece is mainly in order to change the rivers direction, if adopt thick baffle can realize the rivers direction change through changing the water hole shape. Be equipped with first baffle between oil removal detritus pond and the oxygen deficiency pond, be equipped with the second baffle between oxygen deficiency pond and the good oxygen pond, be equipped with the third baffle between good oxygen pond and the sedimentation tank, be equipped with the first water hole of crossing on the first baffle, be equipped with the second on second, the third baffle respectively and cross the water hole and the third crosses the water hole, oil removal detritus pond, oxygen deficiency pond, good oxygen pond and sedimentation tank loop through the water hole UNICOM of crossing on first baffle, second baffle, the third baffle, through the design to crossing the water hole position, have improved the hydraulic condition in the device. In addition, the size and the data of the water holes on the partition plate are calculated according to the actual sewage treatment capacity, namely, the water holes are related to the actual use scene, and can be adaptively changed according to requirements.
Preferably, a first dosing pipe is communicated with the anoxic tank and is communicated with the diversion trench, and a second dosing pipe is arranged in the aerobic tank; the oil separation and sedimentation tank is internally provided with a water inlet pipe, the oil separation and sedimentation tank is provided with an oil collecting pipe, an oil separation groove and a slag trap, and the oil separation groove is internally provided with the water inlet pipe and the oil collecting pipe.
The oil separation and slag settling tank is provided with a first chemical feeding pipe, and the first chemical feeding pipe extends into a diversion trench of the anoxic tank; the overhaul hole wall of the aerobic tank is provided with a second medicine feeding pipe. The first dosing pipe is a carbon source dosing pipe, and the effect of removing total nitrogen can be guaranteed by adding the carbon source at a low carbon-nitrogen ratio; the second dosing pipe is a phosphorus removal dosing pipe, and the total phosphorus removal effect can be guaranteed.
Preferably, the bottom parts of the aerobic tank aeration main pipe and the anoxic tank aeration main pipe are respectively provided with a perforated aeration pipe, and the perforated aeration pipe is provided with holes with two sides staggered and obliquely downwards opened; the sedimentation tank is also provided with a sludge suction pipe and a sludge sliding plate, the sludge sliding plate is obliquely arranged at the bottom of the sedimentation tank, the sludge suction pipe is vertically arranged at the bottom of the inclined surface of the sludge sliding plate, the sludge suction pipe is connected with a sludge discharge pipe at the upper part of the sedimentation tank, the sedimentation tank is also provided with an overflow weir, the overflow weir is arranged at the upper end of the sedimentation tank, and the overflow weir is connected with a water outlet pipe; active fillers are filled in the anoxic tank and the aerobic tank; the active fillers filled in the anoxic tank and the aerobic tank are porous rotary spherical suspended biological fillers; the upper parts of the anoxic pond and the aerobic pond are provided with isolation nets; and a nitrifying liquid return pipe is arranged in the aerobic tank and is introduced into the diversion trench of the anoxic tank.
Active fillers, such as porous rotary spherical suspended biological fillers, are added into the anoxic tank and the aerobic tank, so that the contact area between microorganisms and sewage is increased, and the amount and types of the microorganisms in the system are improved, thereby improving the impact resistance and the treatment efficiency of the system. The bottom parts of the aerobic tank aeration main pipe and the anoxic tank aeration main pipe are respectively provided with a perforated aeration pipe, the perforated aeration pipe is provided with holes which are staggered at two sides and are inclined downwards, and the perforated aeration pipe is a flexible pipe which can be bent at will and can better adapt to an arc-shaped tank body; the sludge suction pipe is connected with the sludge discharge pipe at the upper part of the sedimentation tank, the sludge discharge pipe comprises a sludge return pipe communicated with the flow guide groove of the anoxic tank and a sludge discharge pipe extending out of the shell from the end of the sedimentation tank, and the upper parts of the anoxic tank and the aerobic tank are provided with separation nets which can effectively intercept active fillers below the water surface so as to prevent the fillers from being accelerated and aged due to exposure to the water surface. A nitrifying liquid return pipe is arranged in the aerobic tank and is introduced into the diversion trench of the anoxic tank. The water inflow, the sludge backflow and the nitrification liquid backflow after oil and slag separation all flow into the anoxic tank from the bottom and flow out of the anoxic tank from the upper part through the diversion trench of the anoxic tank, the hydraulic condition of the anoxic tank is effectively improved by the high-water-volume upflow, and the tank capacity utilization rate is further increased.
The beneficial effects of the utility model are that:
(1) the floating oil and the excess sludge can be continuously discharged, and the system is stable in operation;
(2) effectively improved the hydraulic condition of device, the pond holds the high-usage, and the treatment effect is good:
(3) no underwater electromechanical equipment is arranged in the shell, and the operation and maintenance are convenient.
Drawings
FIG. 1 is a plan view of the present application;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a view of a first separator plate aperture;
FIG. 4 is a view of a second separator plate aperture;
fig. 5 is a view of a third separator opening.
In the figure: 1. a housing; 2. an oil removal and slag settling tank; 23. a first water through hole; 3. an anoxic tank; 34. a second water through hole; 4. an aerobic tank; 45. a third water through hole; 5. a sedimentation tank; 6. an oil separating groove; 7. a slag trap; 8. an active filler; 9. an isolation net; 10. a diversion trench; 11. a mud sliding plate; 12. an overflow weir; 13. a water inlet pipe; 14. an oil collecting pipe; 15. a water outlet pipe; 16. a sludge discharge pipe; 161. a sludge return pipe; 162. a sludge discharge pipe; 17. an air inlet pipe; 171. an aeration main pipe of the aerobic tank; 172. an anoxic tank aeration main pipe; 173. a gas stripping mud discharging inlet pipe; 174. the nitrified liquid is stripped and refluxed to an air inlet pipe; 18. a mud suction pipe; 181. a sludge suction port; 19. a nitrifying liquid return pipe.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1
As shown in the attached figures 1-2, a small-sized rural domestic sewage treatment device comprises a shell 1, wherein the shell 1 is internally provided with an oil separation and residue precipitation tank 2, an anoxic tank 3, an aerobic tank 4 and a precipitation tank 5 which are separated by a partition plate side by side, the shell 1 is provided with an air inlet pipe 17, a sludge discharge pipe 16, an water inlet pipe 13 and a water outlet pipe 15, the sludge discharge pipe 16 and the water outlet pipe 15 are arranged in the precipitation tank 5, the air inlet pipe 17 comprises an aerobic tank aeration main pipe 171 communicated with the aerobic tank 4, an anoxic tank aeration main pipe 172 communicated with the anoxic tank, an air stripping and sludge discharge air inlet pipe 173 communicated with the precipitation tank, a nitrification liquid air stripping and backflow air inlet pipe 174 communicated with the aerobic tank, and the aerobic tank 4 is filled with active fillers 8; the partition plate is provided with water through holes; the anoxic pond 3 is provided with a diversion trench 10; the sludge discharge pipe 16 comprises a sludge return pipe 161 communicated with the inside of the diversion trench 10 of the anoxic pond 3 and a sludge discharge pipe 162 of which the end of the sedimentation pond 5 extends out of the shell 1; the partition plates comprise a first partition plate arranged between the oil separation dreg sedimentation tank 2 and the anoxic tank 3, a second partition plate arranged between the anoxic tank 3 and the aerobic tank 4, and a third partition plate arranged between the aerobic tank 4 and the sedimentation tank 5; a first water through hole 23 is formed in the upper part of the first partition plate, and the slag trap 7 covers the first water through hole 23 in the first partition plate; a second water passing hole 34 is formed in the horizontal center line of the second partition plate; a third water through hole 45 is formed in the upper part of the third partition plate; the horizontal position of the first water passing hole 23 is higher than that of the second water passing hole 34, the horizontal position of the second water passing hole 34 is higher than that of the third water passing hole 45, the number of the second water passing holes 34 is not less than 2, the shapes and the sizes of the second water passing holes are completely the same, as shown in fig. 3-5, and flow deflectors are arranged on the water outlet sides of the second water passing hole 34 and the third water passing hole 45; one end of the first water through hole 23 close to the anoxic pond 3 is provided with a diversion trench 10, and the diversion trench 10 leads to the bottom of the anoxic pond; a first dosing pipe is communicated with the anoxic tank 3 and is communicated with the diversion trench 10, and a second dosing pipe is arranged in the aerobic tank 4; a water inlet pipe 13 is introduced into the oil separation and residue settling tank 2, the oil separation and residue settling tank 2 is provided with an oil collecting pipe 14, an oil separation tank 6 and a residue baffle 7, and the water inlet pipe 13 and the oil collecting pipe 14 are introduced into the oil separation tank 6; the bottom parts of the aerobic tank aeration main pipe 171 and the anoxic tank aeration main pipe 172 are respectively provided with a perforated aeration pipe, and the perforated aeration pipe is provided with holes with two sides staggered and inclined downwards; the sedimentation tank 5 is also provided with a sludge suction pipe 18 and a sludge slide plate 11, the sludge slide plate 11 is obliquely arranged at the bottom of the sedimentation tank 5, the sludge suction pipe 18 is vertically arranged at the bottom of the inclined surface of the sludge slide plate 11, the sludge suction pipe 18 is connected with a sludge discharge pipe 16 at the upper part of the sedimentation tank 5, the sedimentation tank 5 is also provided with an overflow weir 12, the overflow weir 12 is arranged at the upper end of the sedimentation tank 5, and the overflow weir 12 is connected with a water outlet pipe 15; active fillers 8 are filled in the anoxic tank 3 and the aerobic tank 4; the active fillers 8 filled in the anoxic tank 3 and the aerobic tank 4 are porous rotary spherical suspended biological fillers; the upper parts of the anoxic tank 3 and the aerobic tank 4 are provided with an isolation net 9; a nitrifying liquid return pipe 19 is arranged in the aerobic tank 4, and the nitrifying liquid return pipe 19 is introduced into the diversion trench 10 of the anoxic tank 3.
During specific work, sewage flows into the shell, oil substances and large-particle impurities are removed through the oil separation and residue settling tank in sequence, organic pollutants, phosphorus and ammonia nitrogen are removed through the aerobic tank, nitrifying liquid flowing back from the aerobic tank contains dissolved oxygen, the anoxic tank is in an anoxic environment, denitrifying bacteria perform denitrification reaction under the anoxic condition, so that total nitrogen is removed, and finally sludge-water separation is performed on the sewage through the settling tank to remove suspended matters so as to achieve the purpose of sewage purification. The anoxic tank and the aerobic tank are added with active fillers, so that attachment places are provided for microorganisms, the contact area between the microorganisms and sewage is increased, the active fillers are in a fluidized state in the operation process, different microorganisms are attached to the inside and the outside of each carrier, anaerobic bacteria and facultative bacteria grow inside the carriers, aerobic bacteria grow outside the carriers, the microbial biomass and types in the system are increased, each carrier is a micro-reactor, and nitrification and denitrification reactions occur simultaneously, so that the shock resistance and the treatment efficiency of the system are improved, in addition, the single individual volume of the porous rotary spherical suspended filler biological carrier is large, the interception is easy, and almost no loss exists in the operation process. Sewage flows into the anoxic tank diversion trench from the oil separation sediment tank through the first water through holes 23 on the first partition plate, the diversion trench 10 enables the sewage to enter the anoxic tank from the bottom, water flows in and out of the anoxic tank from bottom to top, sludge can be effectively in a suspension state, the sewage is prevented from sinking into the bottom of the tank, the water flows to all corners in the tank, and the tank capacity is fully utilized; then the second on the second baffle crosses the water hole 34 and flows out to good oxygen pond, sewage flows into the sedimentation tank from good oxygen pond via third water hole 45, the second crosses water hole 34 position and is higher than third water hole 45, under the separation effect of filler, rivers in the good oxygen pond can flow to each corner in the pond, make full use of sedimentation tank area, sewage flows into the outlet pipe through the overflow weir at last, the discharge casing, because third crosses water hole horizontal position and is lower than outlet pipe 15, little to the mud disturbance of sedimentation tank below, can deposit mud better, mud slides into the sedimentation tank bottom through smooth mud board. The first dosing pipe is a carbon source dosing pipe, and the carbon source is added at a low carbon-nitrogen ratio, and the added carbon source enters the bottom of the anoxic tank along with sewage entering the anoxic tank, so that the carbon source is fully utilized by microorganisms in water, and the removal effect of total nitrogen can be guaranteed; the second dosing pipe is a phosphorus removal dosing pipe, and the total phosphorus removal effect can be guaranteed. The wall of the overhaul hole of the aerobic tank 3 is provided with an air inlet pipe 17, the air inlet pipe 17 is divided into four paths in the aerobic tank 3, each path of air pipe is provided with an independent valve, namely an aeration main pipe 171 of the aerobic tank, an aeration main pipe 172 of the anoxic tank, an air stripping sludge discharging air inlet pipe 173 and a nitrification liquid air stripping return air inlet pipe 174, and the air flow of each path can be effectively adjusted through the valves. The aerobic tank 4 is aerated to provide an aerobic growth environment for microorganisms, and the anoxic tank is micro-aerated to play a role in stirring, so that the tank capacity utilization rate is improved; the sludge is discharged and refluxed by gas stripping, and the nitrated liquid is refluxed by gas stripping, thereby saving a power device and reducing the energy consumption of maintenance work and operation. The sludge suction pipe is connected with the sludge discharge pipe on the upper part of the sedimentation tank, the sludge discharge pipe is divided into two paths, each path is provided with an independent valve, the sludge return pipe flows back into the diversion trench of the anoxic tank, and the sludge discharge pipe extends out of one side of the shell to be connected with an external sludge storage device, so that continuous sludge discharge of the sedimentation tank can be realized. A nitrifying liquid return pipe is arranged in the aerobic tank 4, returns to the diversion trench of the anoxic tank, enters the bottom of the anoxic tank along with sewage and carbon sources entering the anoxic tank, fully performs denitrification reaction, and effectively removes total nitrogen.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications based on the present invention to achieve substantially the same technical effects are all covered by the scope of the present invention.
Claims (10)
1. A small rural domestic sewage treatment device comprises a shell (1), wherein the shell (1) is internally provided with an oil separation and residue precipitation tank (2), an anoxic tank (3), an aerobic tank (4) and a sedimentation tank (5) which are separated by a partition plate side by side, the shell (1) is provided with an air inlet pipe (17), a sludge discharge pipe (16), an water inlet pipe (13) and a water outlet pipe (15), the sludge discharge pipe (16) and the water outlet pipe (15) are arranged in the sedimentation tank (5), and the small rural domestic sewage treatment device is characterized in that the air inlet pipe (17) comprises an aerobic tank aeration main pipe (171) communicated with the aerobic tank (4), an anoxic tank aeration main pipe (172) communicated with the anoxic tank, an air stripping and sludge discharge air inlet pipe (173) communicated with the sedimentation tank, a nitrification liquid air stripping and backflow air inlet pipe (174) communicated with the aerobic tank, and active fillers (8) are filled in the aerobic tank (4); the partition plate is provided with water through holes; the anoxic pond (3) is provided with a diversion trench (10); the sludge discharge pipe (16) comprises a sludge return pipe (161) communicated with the inside of the diversion trench (10) of the anoxic pond (3) and a sludge discharge pipe (162) extending out of the shell (1) from the end of the sedimentation pond (5).
2. The small-sized rural domestic sewage treatment device according to claim 1, wherein the partition plates comprise a first partition plate arranged between the oil-separating and slag-settling tank (2) and the anoxic tank (3), a second partition plate arranged between the anoxic tank (3) and the aerobic tank (4), and a third partition plate arranged between the aerobic tank (4) and the sedimentation tank (5).
3. The small-sized rural domestic sewage treatment device according to claim 2, wherein the first partition plate is provided with a first water through hole (23) at the upper part; a second water passing hole (34) is formed in the horizontal center line of the second partition plate; a third water through hole (45) is formed in the upper part of the third partition plate; flow deflectors are arranged on the water outlet sides of the second water passing hole (34) and the third water passing hole (45).
4. The small-sized rural domestic sewage treatment device according to claim 3, wherein the first water through hole (23) is higher in horizontal position than the second water through hole (34), and the second water through hole (34) is higher in horizontal position than the third water through hole (45); the first water hole (23) of crossing is being close to oxygen deficiency pond (3) one end and is being equipped with guiding gutter (10), guiding gutter (10) lead to oxygen deficiency bottom of the pool portion.
5. The small rural domestic sewage treatment device according to claim 3, wherein a first chemical feeding pipe is further communicated in the anoxic tank (3), the first chemical feeding pipe is communicated into the diversion trench (10), and a second chemical feeding pipe is arranged in the aerobic tank (4).
6. A small-sized rural domestic sewage treatment device according to claim 3, wherein a water inlet pipe (13) is introduced into the oil separation and residue settling tank (2), the oil separation and residue settling tank (2) is provided with an oil collecting pipe (14), an oil separation tank (6) and a residue baffle plate (7), the water inlet pipe (13) and the oil collecting pipe (14) are introduced into the oil separation tank (6), and the residue baffle plate (7) covers the first water through hole (23) on the first partition plate.
7. The small-sized rural domestic sewage treatment device according to claim 1, wherein the bottom of the main aeration pipe (171) of the aerobic tank and the bottom of the main aeration pipe (172) of the anoxic tank are respectively provided with a perforated aeration pipe, and the perforated aeration pipe is provided with holes which are staggered and obliquely downwards opened at two sides.
8. The small-sized rural domestic sewage treatment device according to claim 1, wherein the sedimentation tank (5) is further provided with a sludge suction pipe (18) and a sludge slide plate (11), the sludge slide plate (11) is obliquely arranged at the bottom of the sedimentation tank (5), the sludge suction pipe (18) is vertically arranged at the bottom of the inclined surface of the sludge slide plate (11), the sludge suction pipe (18) is connected with a sludge discharge pipe (16) at the upper part of the sedimentation tank (5), the sedimentation tank (5) is further provided with an overflow weir (12), the overflow weir (12) is arranged at the upper end of the sedimentation tank (5), and the overflow weir (12) is connected with a water outlet pipe (15).
9. The small-sized rural domestic sewage treatment device according to claim 1, wherein the anoxic tank (3) and the aerobic tank (4) are filled with active fillers (8); the active fillers (8) filled in the anoxic tank (3) and the aerobic tank (4) are porous rotary spherical suspended biological fillers; and the upper parts of the anoxic tank (3) and the aerobic tank (4) are provided with separation nets (9).
10. The small rural domestic sewage treatment device according to claim 1, wherein a nitrifying liquid return pipe (19) is arranged in the aerobic tank (4), and the nitrifying liquid return pipe (19) is introduced into the diversion trench (10) of the anoxic tank (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220591245.6U CN217265318U (en) | 2022-03-17 | 2022-03-17 | Small-size rural domestic sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220591245.6U CN217265318U (en) | 2022-03-17 | 2022-03-17 | Small-size rural domestic sewage treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217265318U true CN217265318U (en) | 2022-08-23 |
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| CN117342759A (en) * | 2023-12-06 | 2024-01-05 | 浙江浙达水业有限公司 | Method and system for collecting and treating agricultural product processing wastewater |
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Address after: 310000 Room 1901, Building 3, MIXC, Jianggan District, Hangzhou, Zhejiang Patentee after: Zhejiang Zheda Water Industry Co.,Ltd. Address before: 310000 1901, block B, China Resources Building, Shangcheng District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG UNIVERSITY WATER CO.,LTD. |
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