CN215049475U - Courtyard type sewage treatment facility - Google Patents
Courtyard type sewage treatment facility Download PDFInfo
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- CN215049475U CN215049475U CN202120219427.6U CN202120219427U CN215049475U CN 215049475 U CN215049475 U CN 215049475U CN 202120219427 U CN202120219427 U CN 202120219427U CN 215049475 U CN215049475 U CN 215049475U
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Abstract
The utility model provides a courtyard type sewage treatment facility, which comprises a grid well, a denitrification tank, a facultative tank and an equipment room which are arranged according to a set mode; the wall part of the grid well is provided with a water inlet, the middle part of the grid well is provided with a grid, and the grid well is communicated with the denitrification tank through an overflowing opening, so that sewage in the grid well automatically flows into the denitrification tank after being filtered by the grid; the bottom of the denitrification tank is provided with a first aeration device, and the denitrification tank is communicated with the facultative tank through a flow guide wall so that sewage in the denitrification tank flows back to enter the facultative tank; the bottom of the facultative tank is provided with a second aeration device for intermittent aeration; a water decanter is arranged in the facultative tank and comprises a water inlet structure and a water outlet pipe; an aeration fan and a water producing pump are arranged between the devices, the aeration fan is connected with the first aeration device and the second aeration device, and the water producing pump is connected with a water outlet pipe to discharge water. The device can realize the functions of water inlet, aeration, sedimentation and water outlet in one tank.
Description
Technical Field
The utility model relates to a sewage treatment field especially relates to a courtyard formula sewage treatment facility.
Background
Under the background of rapid development of social economy in China, rural sewage treatment is also developed to a great extent. However, rural sewage has the characteristics of small water discharge, dispersion, large water quality fluctuation and the like, so that the problems of large centralized laying investment, large construction difficulty, high operation and maintenance cost and the like of a sewage pipe network exist. In the existing market, distributed sewage treatment equipment is adopted to collect and treat single-family sewage, but the conditions of high investment cost, poor operation effect and difficulty in reaching the standard of effluent quality exist.
At present, an anaerobic and wetland treatment process is adopted in single-family sewage collection and treatment equipment, the single-family sewage collection and treatment equipment is in an unpowered form, sewage flows into the single-family sewage treatment equipment after being treated by a septic tank, organic matters in water are removed through the metabolic action of anaerobic microorganisms, effluent flows automatically and is discharged into a wetland treatment system, pollutants in the water are further removed, and the process has certain removal capacity on the pollutants in the water.
Although the existing process has certain removal capacity on pollutants in water, the removal effect is poor, and the stable standard reaching is difficult. The existing process has longer hydraulic retention time, and the volume of the tank body is larger under the condition of the same water treatment amount, thereby increasing the investment cost. The prior art is in an unpowered form, effluent needs to be discharged automatically, and the requirement on site terrain conditions is high.
SUMMERY OF THE UTILITY MODEL
In view of the above, embodiments of the present invention provide a yard-type sewage treatment facility to obviate or mitigate one or more disadvantages of the prior art.
The technical scheme of the utility model as follows:
in some embodiments, the sewage treatment facility comprises a grating well, a denitrification tank, a facultative tank and an equipment room which are arranged in a set manner; the wall part of the grid well is provided with a water inlet, the middle part of the grid well is provided with a grid, and the grid well is communicated with the denitrification tank through an overflowing opening, so that sewage in the grid well automatically flows into the denitrification tank after being filtered by the grid; the bottom of the denitrification tank is provided with a first aeration device, and the denitrification tank is communicated with the facultative tank through a flow guide wall, so that sewage in the denitrification tank flows back to enter the facultative tank; the bottom of the facultative tank is provided with a second aeration device for intermittent aeration; a water decanter is arranged in the facultative tank and comprises a water inlet structure and a water outlet pipe, the water inlet structure is arranged on the upper layer of the sewage and used for decanting the supernatant in the tank, and the water outlet pipe is used for being connected to the equipment room; an aeration fan and a water producing pump are arranged between the devices, the aeration fan is connected with the first aeration device and the second aeration device, and the water producing pump is connected with a water outlet pipe to discharge water.
In some embodiments, a liquid level meter for detecting the liquid level in the facultative tank is further arranged in the facultative tank, and the liquid level meter is in linkage control with the aeration fan and the water production pump; when the liquid level meter detects that the water level in the facultative tank reaches a first water level, the aeration fan is started, the second aeration device aerates the water body for a first set time period, and after standing and precipitating for a second set time period, the water production pump controls the decanter to decant supernatant in the facultative tank; and when the liquid level meter detects that the water level in the facultative tank reaches a second water level, the water production pump stops running.
In some embodiments, the decanter is a float decanter which comprises a float shell, the outer wall of the float shell is provided with at least one limiting lug, and the decanter is installed in the facultative tank by inserting the limiting lug on a vertically fixed limiting rod, so that the decanter can move up and down along with the water level in the tank and cannot move horizontally.
In some embodiments, the water inlet structure of the decanter comprises at least one water inlet pipe and a water inlet at one end of the water inlet pipe, the water inlet is located at the bottom of the decanter, the other end of the water inlet pipe is connected with a vertical central pipe, and the bottom of the central pipe is connected with the water outlet pipe.
In some embodiments, a wall between the facultative tank and the equipment room is provided with a through hole for the water outlet pipe to pass through, and the position of the through hole is lower than the second water level.
In some embodiments, the top of the sewage treatment facility is provided with an outlet pipe, and the outlet pipe is connected with a water outlet pipe of the water production pump.
In some embodiments, the grille well is further provided with an override opening for discharging excess inlet water out of the sewage treatment facility when the actual inlet water volume exceeds the design water volume.
In some embodiments, the level gauge is a link level gauge, and the first and second aeration devices are aeration trays.
In some embodiments, an electric control cabinet is arranged on the top of the sewage treatment facility; the top of the equipment room is provided with a cover plate, and the cover plate is provided with a vent pipe or a vent hole.
In some embodiments, the decanter has a diameter of 280mm and a height of 204 mm.
According to the utility model discloses courtyard formula sewage treatment facility, the beneficial effect that can obtain includes at least:
(1) the courtyard type sewage treatment facility provided by the embodiment of the utility model is provided with the decanter in the facultative tank, and can realize the functions of water inlet, aeration, sedimentation and water outlet in one tank.
(2) The utility model discloses courtyard formula sewage treatment facility sets up the guide wall between denitrogenation pond and facultative tank, and the sewage baffling gets into facultative tank, reduces the disturbance to the water, realizes intaking in succession, and intermittent type goes out water.
(3) The utility model discloses courtyard formula sewage treatment facility can satisfy the requirement of different topography and drainage condition through producing the water pump drainage.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the following detailed description.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. For convenience in illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary device actually manufactured according to the present invention. In the drawings:
fig. 1 is a schematic plan view of a yard-type sewage treatment facility according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line A-A and a sectional view taken along line B-B of the yard-type sewage treatment facility of FIG. 1.
Fig. 3 is a schematic structural view of a decanter according to an embodiment of the present invention.
Fig. 4 is a C-C section and a D-D section of the decanter of fig. 3.
The notation in the figure is:
1-water inlet, 2-overrunning port, 3-coarse grid, 4-aeration disc, 5-denitrification tank, 6-liquid level meter and 7-facultative tank
8-float decanter, 9-water outlet pipe of decanter, 10-water producing pump, 11-water producing pump water outlet pipe, 12-aeration fan
13-main air inlet pipe of aeration fan, 14-guide wall, 15-electric control cabinet, 16-cover plate and 17-vent pipe
18-water outlet external discharge pipe, 19-grid well, 20-equipment room, 21-water inlet at bottom of decanter
22-water inlet pipe of decanter, 23-limiting rod and 24-limiting lug
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and/or process steps that are closely related to the solution according to the invention are shown in the drawings, while other details that are not relevant to the invention are omitted.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
It is also noted herein that the term "coupled," if not specifically stated, may refer herein to not only a direct connection, but also an indirect connection in which an intermediate is present.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.
The utility model provides a courtyard formula sewage treatment facility mainly solves the single household sewage collection treatment facility on the existing market, with high costs, the operation effect is poor, play water quality of water is difficult to problem up to standard, the utility model discloses a change sewage treatment technology, improve play water quality of water, reduction in production cost.
As shown in fig. 1, in some embodiments, the sewage treatment facility includes a grid well 19, a denitrification tank 5, a facultative tank 7 and an equipment room 20 arranged in a set manner. The arrangement of the setting mode described herein refers to arranging the chambers with different functions in a certain mode, such as a rectangular arrangement or a circular arrangement, etc., in the internal space of the sewage treatment facility.
In some embodiments, the grille well 19 is primarily used to accomplish primary filtering and over-discharge of influent water. The wall portion of grid well 19 is equipped with water inlet 1, and the middle part position is equipped with grid 3, and through overflowing mouthful intercommunication between the 19 denitrogenation ponds of grid well 5 to make the sewage of grid well 19 flow into denitrogenation pond 5 certainly after 3 filters through grid. The grid 3 can be a grid or a combination of multiple grids, and the grid 3 can adopt one or more of a thick grid (50-100 mm), a medium grid (10-40 mm) and a thin grid (1.5-10 mm) according to actual requirements, preferably a thick grid. In other embodiments, the grille well 19 is further provided with an overrunning port 2 or a overrunning pipe, and when the actual water inflow exceeds the designed water amount, the overrunning port 2 or the overrunning pipe is used for discharging the redundant inflow water out of the sewage treatment facility, so that the influence of overlarge water inflow on the sewage treatment efficiency and the treated water quality is avoided.
In some embodiments, the denitrification tank 5 is mainly used for organic matter removal and denitrification of the sewage. The bottom of the denitrification tank 5 is provided with a first aeration device, and the denitrification tank 5 is communicated with the facultative tank 7 through a flow guide wall 14, so that sewage in the denitrification tank 5 flows back to enter the facultative tank 7. Set up the guide wall 14 between denitrogenation pond 5 and the facultative tank 7, sewage baffling gets into facultative tank 7, can reduce the disturbance to the water, realizes intaking in succession, and intermittent type goes out water. The bottom of the denitrification tank 5 is provided with a first aeration device, and the aeration fan 12 is used for aerating the water body so as to achieve the purposes of removing organic matters and denitrifying; the first aeration device may employ an aeration tray 4.
In some embodiments, the facultative tank 7 is mainly used for realizing the functions of water inlet, aeration, sedimentation and water outlet in one tank. The bottom of the facultative tank 7 is provided with a second aeration device, a water decanter 8 is arranged in the facultative tank 7, the water decanter 8 comprises a water inlet structure and a water outlet pipe 9, the water inlet structure is arranged on the upper layer of the sewage and used for decanting the supernatant in the tank, and the water outlet pipe 9 is used for being connected to an equipment room 20 so as to discharge the treated sewage out of the facultative tank. In some embodiments, the second aeration device is used for intermittent aeration to complete the whole processes of water inlet, aeration, sedimentation and water outlet in the facultative tank 7, and an aerobic and anaerobic alternate state is formed in the facultative tank, which is beneficial to further removing organic matters and nitrogen and phosphorus. The second aeration device may employ an aeration tray 4.
In some embodiments, the plant room 20 is provided with an aeration fan 12 and a water generating pump 10, the aeration fan 12 is connected with the first aeration device and the second aeration device, and the water generating pump 10 is connected with the water outlet pipe 9 to discharge the discharged water.
The utility model provides a courtyard formula sewage treatment facility collects into water, aeration, deposits, goes out water as an organic whole, can realize nitrogen and phosphorus removal, continuous water, intermittent type play water. In addition, the courtyard type sewage treatment facility has the advantages of short hydraulic retention time, small occupied area, investment saving and the like, is wide in application range, and has great popularization value and economic benefit.
In some embodiments, a liquid level meter 6 for detecting the liquid level in the facultative tank 7 is also arranged in the facultative tank, and the liquid level meter 6 is controlled by being linked with an aeration fan 12 and a water producing pump 10. When the liquid level meter 6 detects that the water level in the facultative tank 7 reaches a first water level, the aeration fan 12 is started, the second aeration device aerates the water body for a first set time period, and after standing and precipitating for a second set time period, the water producing pump 10 controls the decanter 8 to decant the supernatant in the facultative tank 7; and when the liquid level meter 6 detects that the water level in the facultative tank 7 reaches the second water level, the water producing pump 10 stops running.
When the method is specifically implemented, the liquid level meter 6 can adopt a connecting rod liquid level meter, the operation of the facultative tank 7 is controlled by the water level measured by the liquid level meter 6, water enters to a high liquid level, the aeration fan 12 is started, the aeration fan 12 is closed after aeration for a period of time, standing and precipitating for a period of time, the water producing pump 10 is started, supernatant in the tank is discharged through the decanter, and the water producing pump 10 is closed after reaching a low water level. The circulation operation is carried out, the whole process of water inlet, aeration, sedimentation and water outlet is completed in the facultative tank, each time parameter in the process can be adjusted according to the actual operation condition, an aerobic state and an anaerobic state can be formed in the facultative tank, and the organic matter removal, the nitrogen removal and the phosphorus removal are further facilitated.
In some embodiments, the yard-type sewage treatment facility of the embodiment of the utility model adopts an aerobic treatment method, and different aeration modes are respectively carried out on the denitrification tank and the facultative tank. For example, two aeration fans 12 may be used, which supply air to the first aeration device of the denitrification tank and the second aeration device of the facultative tank, respectively, to continuously aerate the denitrification tank and intermittently aerate the facultative tank. The first aeration device and the second aeration device both comprise a plurality of aeration discs 4, and the aeration fan 12 is connected with each aeration disc 4 through an air inlet main pipe 13 and a plurality of air inlet branch pipes of the aeration fan.
In some embodiments, as shown in fig. 3 and 4, the decanter 8 is a float decanter, the decanter 8 comprises a float shell, the outer wall of the float shell is provided with at least one limit lug 24, and the decanter 8 is installed in the facultative tank 7 by inserting the limit lug 24 on a vertically fixed limit rod 23, so that the decanter 8 can move up and down along with the water level in the tank and cannot move horizontally. In this embodiment, the limiting rod 23 can be fixedly installed in the facultative tank 7 in advance and vertically arranged, and more than 2 limiting lugs 24 and limiting rods 23 can be arranged to limit the horizontal movement and rotation of the float decanter 8 in the tank, so as to ensure that the float decanter 8 only moves up and down in the tank.
In some embodiments, as shown in fig. 3 and 4, the water inlet structure of the decanter 8 comprises at least one water inlet pipe 22 and a water inlet 21 at one end of the water inlet pipe 22, the water inlet 21 is located at the bottom of the decanter 8, the other end of the water inlet pipe 21 is connected with a vertical central pipe, and the bottom of the central pipe is connected with the water outlet pipe 9. In this embodiment, as shown in fig. 4, the number of the inlet pipes 22 and the inlets 21 may be three, the inlets 21 may be in a circular sector shape, and the inlet pipes 22 may be square pipes. In specific implementation, the supernatant flows into the water inlet pipe 22 of the decanter through the water inlet 21 at the bottom of the decanter, then is converged through the central pipe and flows into the water outlet pipe 9 of the decanter, and the supernatant is discharged immediately. The decanter does not agitate the supernatant liquid of the precipitate, ensuring the quality of the effluent.
In some embodiments, the wall between the facultative tank 7 and the plant room 20 is provided with a through hole for the water outlet pipe 9 to pass through, and the through hole is located at a position lower than the second water level (i.e. low water level) to meet the design requirement.
In some embodiments, the decanter is 280mm in diameter and 204mm in height, which can meet the requirements of a small tank body; the utility model discloses courtyard formula sewage treatment facility takes up an area of for a short time, and area is about 2m2。
The utility model discloses sewage treatment facility's top is equipped with out outer calandria 18 of water, go out outer calandria 18 of water with the product water pump delivery pipe 11 of product water pump 10 is connected. In this embodiment, the produced water is discharged through the produced water pump 10 and the outlet pipe 18, so as to meet the requirements of different terrains and drainage conditions. The courtyard type sewage treatment facility discharges water by adopting pump power, and can meet different terrain requirements.
In some embodiments, an electric control cabinet 15 is arranged on the top of the sewage treatment facility; place automatically controlled cabinet 15 at whole courtyard formula sewage treatment facility top, courtyard formula sewage treatment facility can realize automatic operation under the condition of normal intaking.
In some embodiments, the top of the equipment room 20 is provided with a cover plate 16, and the cover plate 16 is provided with a vent pipe 17 or a vent hole to meet the operation requirement of the aeration fan 4.
The utility model also aims at providing a sewage treatment method of courtyard type sewage treatment facility which integrates water inlet, aeration, sedimentation and water outlet, has short treatment time, low cost, capability of denitrification and dephosphorization, continuous water inlet, intermittent water outlet and wide application range. According to the utility model discloses courtyard formula sewage treatment facility, its step of handling sewage includes:
(1) raw water flows into the grid well 19, and automatically flows into the denitrification tank 5 after large impurities are removed by filtering through a coarse grid of the grid well 19;
(2) the bottom of the denitrification tank 5 is provided with an aeration disc 4, the aeration fan 12 aerates the water body to supply oxygen for the microorganisms, the aerobic microorganisms are cultured, and the nitrification reaction occurs in the tank so as to achieve the purposes of removing organic matters and denitrifying;
(3) the water after the denitrogenation 5 pond handles gets into facultative tank 7 through the baffling of guiding wall 14, and facultative tank 7 bottom sets up aeration dish 4, sets up connecting rod level gauge 6 in the pond, through the operation of water level control facultative tank 7, advances water to high liquid level, and aeration fan 12 starts, closes aeration fan 12 behind the aeration period, and the sediment period of stewing starts product water pump 10 after, and through the drainage of flotation pontoon decanter 8, product water pump 10 is closed after low liquid level.
The circulation operation is carried out, the whole process of water inlet, aeration, sedimentation and water outlet is completed in the facultative tank, each time parameter in the process can be adjusted according to the actual operation condition, an aerobic state and an anaerobic state can be formed in the facultative tank, and the organic matter removal, the nitrogen removal and the phosphorus removal are further facilitated.
According to the utility model discloses courtyard formula sewage treatment facility, the beneficial effect that can obtain includes at least:
(1) the utility model discloses courtyard formula sewage treatment facility sets up the flotation pontoon in the facultative tank and strains the hydrophone, can realize intaking, aeration, sediment, play water function as an organic whole in a pond.
(2) The utility model discloses courtyard formula sewage treatment facility sets up the guide wall between denitrogenation pond and facultative tank, and the sewage baffling gets into facultative tank, reduces the disturbance to the water, realizes intaking in succession, and intermittent type goes out water.
(3) The utility model discloses courtyard formula sewage treatment facility can satisfy the requirement of different topography and drainage condition through producing the water pump drainage.
(4) The utility model discloses courtyard formula sewage treatment facility adopts the aerobic treatment method, carries out different aeration methods to denitrogenation pond, facultative tank respectively, can reach the purpose of denitrogenation dephosphorization, and it is effectual to go out water quality of water, and the processing time is short.
(5) The utility model discloses courtyard formula sewage treatment facility takes up an area of for a short time, and area is about 2m2It is suitable for single household sewage treatment.
(6) The utility model discloses courtyard formula sewage treatment facility high integration, product can produce the performance height, long service life can stabilize out water, and it is good to go out water quality of water, and shock load is strong.
(7) The utility model discloses courtyard formula sewage treatment facility excess sludge is few, and the operation is noiseless basically.
(8) The utility model discloses courtyard formula sewage treatment facility construction form is nimble, all can arrange to there being the pipe network and not having the pipe network different conditions, can satisfy the requirement of different drainage conditions.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A courtyard type sewage treatment facility is characterized by comprising a grating well, a denitrification pool, a facultative tank and an equipment room which are arranged according to a set mode;
the wall part of the grid well is provided with a water inlet, the middle part of the grid well is provided with a grid, and the grid well is communicated with the denitrification tank through an overflowing opening, so that sewage in the grid well automatically flows into the denitrification tank after being filtered by the grid;
the bottom of the denitrification tank is provided with a first aeration device, and the denitrification tank is communicated with the facultative tank through a flow guide wall, so that sewage in the denitrification tank flows back to enter the facultative tank;
the bottom of the facultative tank is provided with a second aeration device for intermittent aeration; a water decanter is arranged in the facultative tank and comprises a water inlet structure and a water outlet pipe, the water inlet structure is arranged on the upper layer of the sewage and used for decanting the supernatant in the tank, and the water outlet pipe is used for being connected to the equipment room;
an aeration fan and a water producing pump are arranged between the devices, the aeration fan is connected with the first aeration device and the second aeration device, and the water producing pump is connected with a water outlet pipe to discharge water.
2. The courtyard sewage treatment facility according to claim 1, wherein a liquid level meter for detecting the liquid level in the facultative tank is further arranged in the facultative tank, and the liquid level meter is in linkage control with the aeration fan and the water production pump;
when the liquid level meter detects that the water level in the facultative tank reaches a first water level, the aeration fan is started, the second aeration device aerates the water body for a first set time period, and after standing and precipitating for a second set time period, the water production pump controls the decanter to decant supernatant in the facultative tank;
and when the liquid level meter detects that the water level in the facultative tank reaches a second water level, the water production pump stops running.
3. The yard-type sewage treatment facility according to claim 2, wherein the decanter is a pontoon decanter, the decanter comprises a pontoon casing, the outer wall of the pontoon casing is provided with at least one limit lug, and the decanter is mounted in the facultative tank by the limit lug being inserted on a vertically fixed limit rod, so that the decanter can move up and down along with the water level in the tank and cannot move horizontally.
4. The yard-type sewage treatment facility of claim 3 wherein the water intake structure of the decanter comprises at least one water inlet pipe and a water inlet at one end of the water inlet pipe, the water inlet being located at the bottom of the decanter, the other end of the water inlet pipe being connected to a vertical center pipe, the bottom of the center pipe being connected to the water outlet pipe.
5. The yard-type sewage treatment facility according to claim 4, wherein a wall portion between the facultative tank and the equipment room is provided with a through hole through which the water outlet pipe passes, the through hole being located at a position lower than the second water level.
6. The yard-type sewage treatment facility of claim 1, wherein an outlet drain pipe is arranged at the top of the sewage treatment facility and is connected with a water outlet pump water outlet pipe of the water production pump.
7. The yard-type sewage treatment facility of claim 1 wherein the grating well is further provided with an override port for draining excess influent water out of the sewage treatment facility when the actual influent water volume exceeds the design water volume.
8. The yard-type sewage treatment facility of claim 2, wherein the level meter is a link level meter and the first and second aeration devices are aeration trays.
9. The yard-type sewage treatment facility of claim 1, wherein an electric control cabinet is provided on the top of the sewage treatment facility; the top of the equipment room is provided with a cover plate, and the cover plate is provided with a vent pipe or a vent hole.
10. The yard sewage treatment facility of claim 3, wherein the decanter is 280mm in diameter and 204mm in height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120219427.6U CN215049475U (en) | 2021-01-26 | 2021-01-26 | Courtyard type sewage treatment facility |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120219427.6U CN215049475U (en) | 2021-01-26 | 2021-01-26 | Courtyard type sewage treatment facility |
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| CN215049475U true CN215049475U (en) | 2021-12-07 |
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| CN202120219427.6U Active CN215049475U (en) | 2021-01-26 | 2021-01-26 | Courtyard type sewage treatment facility |
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