CN210945254U - Constructed wetland treatment device for rural domestic sewage - Google Patents
Constructed wetland treatment device for rural domestic sewage Download PDFInfo
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- CN210945254U CN210945254U CN201921759044.7U CN201921759044U CN210945254U CN 210945254 U CN210945254 U CN 210945254U CN 201921759044 U CN201921759044 U CN 201921759044U CN 210945254 U CN210945254 U CN 210945254U
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- 239000010865 sewage Substances 0.000 title claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000012856 packing Methods 0.000 claims description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 56
- 238000005273 aeration Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 229910021536 Zeolite Inorganic materials 0.000 claims description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 6
- 239000010451 perlite Substances 0.000 claims description 6
- 235000019362 perlite Nutrition 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000010457 zeolite Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 4
- 238000000746 purification Methods 0.000 abstract description 5
- 238000000855 fermentation Methods 0.000 abstract description 2
- 230000004151 fermentation Effects 0.000 abstract description 2
- 230000000813 microbial effect Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model discloses a rural domestic sewage's constructed wetland processing apparatus relates to rural sewage treatment technical field. This constructed wetland processing apparatus includes septic tank, preliminary treatment pond, first constructed wetland pond, second constructed wetland pond, the septic tank left side is equipped with the collection dirty pipe, the septic tank right side is equipped with defeated dirty pipe and preliminary treatment pond intercommunication, preliminary treatment pond right side is equipped with first raceway and first constructed wetland pond intercommunication, first constructed wetland pond right side is equipped with second raceway and second constructed wetland pond intercommunication, second constructed wetland pond right side is equipped with the drain pipe. The utility model discloses utilize septic tank and preliminary treatment pond to carry out multistage microbial fermentation preliminary treatment in advance to domestic sewage, the degradation organic composition is successively sent into first artifical wetland pond, the artifical wetland pond of second of different flow directions and is carried out deep purification treatment, has improved sewage treatment efficiency and purification degree, and the waste water after the preliminary treatment is difficult for blockking up the constructed wetland pipeline in low reaches.
Description
Technical Field
The utility model relates to a rural sewage treatment technical field, concretely relates to rural domestic sewage's constructed wetland processing apparatus.
Background
With the increasing severity of the water pollution problem, a series of powerful measures are taken for remedying the water pollution at home and abroad. The common centralized sewage treatment facility in rural areas lacking municipal sewage pipe networks has great limitation in actual operation, and the collection and treatment of domestic sewage are difficult.
The artificial wetland is a sewage biological treatment technology developed in the late 70 s of the 20 th century. The technology has the advantages of low investment and operation cost, convenient maintenance and management and the like, and is particularly suitable for rural areas with relatively laggard funds and technologies. Under the big background of centralized control of rural environment in China, the technology is widely popularized and used. However, in the field operation process, the technology has the advantage of convenient maintenance and management, but has the obvious defect of no regulation and control. Except for the water inlet load of the system, the content that managers can regulate and control is not much. The poor controllability is an important reason for the failure of most of the conventional constructed wetlands, such as the occurrence of substrate blockage.
SUMMERY OF THE UTILITY MODEL
In view of this, the purpose of this application is to provide a rural domestic sewage's constructed wetland treatment device to the problem that current constructed wetland treatment device for rural domestic sewage is uneven, is easy to block up, and purification efficiency is lower.
For solving above technical problem, the utility model provides a technical scheme is a rural domestic sewage's constructed wetland processing apparatus, including septic tank, preliminary treatment pond, the septic tank left side is equipped with the sewage collection pipe, the septic tank right side is equipped with defeated dirty pipe and preliminary treatment pond intercommunication, still includes first artifical wetland pond, the artifical wetland pond of second, preliminary treatment pond right side is equipped with first raceway and first artifical wetland pond intercommunication, first artifical wetland pond right side is equipped with second raceway and second artifical wetland pond intercommunication, second artifical wetland pond right side is equipped with the drain pipe, first artifical wetland pond and the artifical wetland pond of second are the concrete wall body of the prevention of seepage processing of right trapezoid structure, and first artifical wetland pond is the artifical wetland pond of up-going undercurrent formula, and the artifical wetland pond of second is horizontal undercurrent formula.
Further, the septic tank includes first cavity, second cavity, third cavity, all be equipped with the through-hole between first cavity and second cavity, second cavity and the third cavity, first cavity, second cavity, third cavity top all are equipped with the clear dirty mouth, vertical direction is equipped with the (mixing) shaft in the middle of the first cavity, the (mixing) shaft is connected with the agitator motor coaxial coupling that first cavity top set up, the septic tank top is equipped with the medicament case, the medicament case passes through the first cavity of pipeline intercommunication, is equipped with the solenoid valve on the pipeline between medicament case and the first cavity, is equipped with liquid biological septic agent in the medicament case.
Further, the pretreatment tank comprises an anoxic chamber and an aerobic chamber, the tops of the anoxic chamber and the aerobic chamber are provided with sewage cleaning ports, microporous aeration pipes are arranged in the anoxic chamber and the aerobic chamber, the microporous aeration pipes are connected with aeration fans arranged at the top of the pretreatment tank through aeration pipes, guide pipes are arranged in the anoxic chamber and the aerobic chamber and communicated with the sewage conveying pipes and the anoxic chamber respectively, L-shaped overflow grooves are arranged on the right side walls of the anoxic chamber and the aerobic chamber, the overflow grooves in the anoxic chamber are located at the water inlet of the guide pipes, the overflow grooves in the aerobic chamber are located at the water inlet of the first water conveying pipe, and suspended fillers are arranged in the anoxic chamber and the aerobic chamber.
Further, first artifical wetland pond has filled first packing layer, second packing layer, third packing layer, fourth packing layer from bottom to top in proper order, the delivery port of first raceway is located first packing in situ, and the delivery port department of first raceway is connected with the first water distributor of horizontal setting, evenly sets up a plurality of round holes on the first water distributor, fourth packing layer right side is close to first artifical wetland pond pool wall department and is equipped with the fifth packing layer, transversely set up first collector pipe in the fifth packing layer, evenly set up a plurality of round holes on the first collector pipe, and with the water inlet of second raceway is connected, plant the floating plant on the fourth packing layer.
Furthermore, a sixth packing layer, a seventh packing layer and an eighth packing layer are sequentially filled in the second constructed wetland pool from left to right, a water outlet of the second water conveying pipe is located in the sixth packing layer, a second water distribution pipe which is transversely arranged is connected to a water outlet of the second water conveying pipe, a plurality of round holes are uniformly formed in the second water distribution pipe, a second water collection pipe is transversely arranged in the eighth packing layer, a plurality of round holes are uniformly formed in the second water collection pipe and are connected with a water inlet of the water outlet pipe, and emergent aquatic plants are planted on the seventh packing layer.
Further, a control box is further arranged at the top of the septic tank and comprises a power supply module, a microcontroller, a GPRS wireless communication module, a first driving module and a second driving module, the power supply module, the GPRS wireless communication module, the first driving module and the second driving module are respectively and electrically connected with the microcontroller, the microcontroller is connected with a remote control terminal network through the GPRS wireless communication module and a GPRS wireless network, the microcontroller is electrically connected with the electromagnetic valve through the first driving module and a lead, and the microcontroller is electrically connected with the stirring motor through the second driving module and the lead; the bottom of the first cavity is also fixedly provided with a pressure sensor, and the pressure sensor is electrically connected with the microcontroller through a lead.
Further, the remote control terminal is a mobile phone.
Furthermore, the first packing layer is gravel with the diameter of 6-15mm, the second packing layer is perlite and zeolite, the third packing layer is coarse sand and fly ash, the fourth packing layer is fine sand and loess, and the fifth packing layer is gravel with the diameter of 6-8 mm.
Furthermore, the sixth packing layer is gravel and zeolite, the seventh packing layer is perlite, fly ash and loess, and the eighth packing layer is gravel with the diameter of 6-8 mm.
Compared with the prior art, the utility model discloses a beneficial technological effect: the septic tank and the pretreatment tank are utilized to carry out multistage microbial fermentation pretreatment on the domestic sewage in advance, degraded organic components are sequentially sent into the first artificial wetland tank and the second artificial wetland tank in different flow directions to carry out deep purification treatment, the sewage treatment efficiency and the purification degree are improved, and the pretreated sewage is not easy to block downstream artificial wetland pipelines; the remote control terminal is utilized to remotely monitor and treat the septic tank through a wireless network, regulate and control whether the biological septic agent is added or not and whether the stirring motor works or not, improve the treatment efficiency of the pretreatment process, save energy and time and labor at the same time.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a block diagram of the control box of fig. 1.
Reference numerals: 1-a septic tank, 2-a pretreatment tank, 3-a first artificial wetland tank, 4-a second artificial wetland tank, 5-a sewage collecting pipe, 6-a sewage conveying pipe, 7-a first water conveying pipe, 8-a second water conveying pipe, 9-a first chamber, 10-a second chamber, 11-a third chamber, 12-an anoxic chamber, 13-an aerobic chamber, 14-a through hole, 15-a stirring motor, 16-a stirring shaft, 17-a control box, 171-a power supply module, 172-a microcontroller, 173-a GPRS wireless communication module, 174-a first driving module, 175-a second driving module, 18-a sewage cleaning port, 19-an electromagnetic valve, 20-a medicament box, 21-a microporous aeration pipe, 22-an aeration fan, 23-a flow guide pipe, 24-a suspended filler, 25-overflow groove, 26-first packing layer, 27-second packing layer, 28-third packing layer, 29-fourth packing layer, 30-fifth packing layer, 31-first water distribution pipe, 32-first water collection pipe, 33-second water distribution pipe, 34-sixth packing layer, 35-seventh packing layer, 36-eighth packing layer, 37-remote control terminal, 38-second water collection pipe, 39-drain pipe and 40-pressure sensor.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the specific embodiments.
As shown in fig. 1 and 2, an artificial wetland treatment device for rural domestic sewage comprises a septic tank 1, a pretreatment tank 2, a first artificial wetland tank 3 and a second artificial wetland tank 4, wherein a sewage collecting pipe 5 is arranged on the left side of the septic tank 1, a sewage conveying pipe 6 and the pretreatment tank 2 are arranged on the right side of the septic tank 1, a first water conveying pipe 7 and the first artificial wetland tank 3 are arranged on the right side of the pretreatment tank 2, a second water conveying pipe 8 and the second artificial wetland tank 4 are arranged on the right side of the first artificial wetland tank 3, a drain pipe 39 is arranged on the right side of the second artificial wetland tank 4, the first artificial wetland tank 3 and the second artificial wetland tank 4 are concrete wall bodies which are of right-angle trapezoid structures and are used for seepage prevention treatment, the first artificial wetland tank 3 is an up-flow artificial wetland tank, and the second artificial wetland tank 4 is a horizontal subsurface artificial wetland tank.
The pretreatment tank 2 comprises an anoxic chamber 12 and an aerobic chamber 13, wherein the tops of the anoxic chamber 12 and the aerobic chamber 13 are respectively provided with a sewage cleaning port 18, microporous aeration pipes 21 are respectively arranged in the anoxic chamber 12 and the aerobic chamber 13, the microporous aeration pipes 21 are connected with an aeration fan 22 arranged at the top of the pretreatment tank 2 through aeration pipes, guide pipes 23 are respectively arranged inside the anoxic chamber 12 and the aerobic chamber 13 and are respectively communicated with a sewage conveying pipe 6 and the anoxic chamber 12, the right side walls of the anoxic chamber 12 and the aerobic chamber 13 are respectively provided with an L-shaped overflow groove 25, the overflow groove 25 in the anoxic chamber 12 is positioned at a water inlet of the guide pipe 23, the overflow groove 25 in the aerobic chamber 13 is positioned at a water inlet of the first water conveying pipe 7, and the anoxic chamber 12 and the aerobic chamber 13 are respectively provided with a suspended filler 24.
First artifical wetland pond 3 has filled first packing layer 26, second packing layer 27, third packing layer 28, fourth packing layer 29 from bottom to top in proper order, the delivery port of first raceway 7 is located first packing layer 26, and the delivery port department of first raceway 7 is connected with the first water-distribution pipe 31 of horizontal setting, evenly sets up a plurality of round holes on the first water-distribution pipe 31, fourth packing layer 29 right side is close to 3 pond walls departments in first artifical wetland pond and is equipped with fifth packing layer 30, transversely set up first collector pipe 32 in the fifth packing layer 30, evenly set up a plurality of round holes on the first collector pipe 32, and with the water inlet of second raceway 8 is connected, plant the floating plant on the fourth packing layer 29.
The second artificial wetland pool 4 is sequentially filled with a sixth packing layer 34, a seventh packing layer 35 and an eighth packing layer 36 from left to right, a water outlet of the second water pipe 8 is positioned in the sixth packing layer 34, a water outlet of the second water pipe 8 is connected with a second water distribution pipe 33 which is transversely arranged, a plurality of round holes are uniformly formed in the second water distribution pipe 33, a second water collection pipe 38 is transversely arranged in the eighth packing layer 36, a plurality of round holes are uniformly formed in the second water collection pipe 38 and are connected with a water inlet of the water outlet pipe 39, and emergent aquatic plants are planted on the seventh packing layer 35.
The top of the septic tank 1 is further provided with a control box 17, the control box 17 comprises a power module 171, a microcontroller 172, a GPRS wireless communication module 173, a first drive module 174 and a second drive module 175, the power module 171, the GPRS wireless communication module 173, the first drive module 174 and the second drive module 175 are respectively electrically connected with the microcontroller 172, the microcontroller 172 is in network connection with the remote control terminal 37 through the GPRS wireless communication module 173 and a GPRS wireless network, the microcontroller 172 is electrically connected with the electromagnetic valve 19 through the first drive module 174 and a lead, and the microcontroller 172 is electrically connected with the stirring motor 15 through the second drive module 175 and a lead; the bottom of the first chamber 9 is further fixedly provided with a pressure sensor 40, and the pressure sensor 40 is electrically connected with the microcontroller 172 through a conducting wire.
The first packing layer 26 is gravel with the diameter of 6-15mm, the second packing layer 27 is perlite and zeolite, the third packing layer 28 is coarse sand and fly ash, the fourth packing layer 29 is fine sand and loess, and the fifth packing layer 30 is gravel with the diameter of 6-8 mm; the sixth packing layer 34 is gravel and zeolite, the seventh packing layer 35 is perlite, fly ash and loess, and the eighth packing layer 36 is gravel with a diameter of 6-8 mm.
The thickness of the first packing layer is 10-20cm, the thickness of the second packing layer is 20-30cm, the thickness of the third packing layer is 10-30cm, the thickness of the fourth packing layer is 30-40cm, the thickness of the fifth packing layer is 10-40cm, and the horizontal distance between the left end of the fifth packing layer and the right side pool wall of the first artificial wetland pool is 10-20 cm; the horizontal distance between the right end of the sixth packing layer and the left side pool wall of the second artificial wetland pool is 10-20cm, and the horizontal distance between the left end of the upper surface of the eighth packing layer and the right side pool wall of the second artificial wetland pool is 10-20 cm.
The remote control terminal 37 is a mobile phone, the microcontroller is STM32F107, and the pressure sensor is PT 124G-213.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.
Claims (9)
1. The utility model provides a rural domestic sewage's constructed wetland processing apparatus, includes septic tank (1), preliminary treatment pond (2), septic tank (1) left side is equipped with collection dirty pipe (5), septic tank (1) right side is equipped with defeated dirty pipe (6) and preliminary treatment pond (2) intercommunication, its characterized in that: still include first artifical wetland pond (3), the artifical wetland pond of second (4), preliminary treatment pond (2) right side is equipped with first raceway (7) and first artifical wetland pond (3) intercommunication, first artifical wetland pond (3) right side is equipped with second raceway (8) and the artifical wetland pond of second (4) intercommunication, the artifical wetland pond of second (4) right side is equipped with drain pipe (39), first artifical wetland pond (3) and the artifical wetland pond of second (4) are the concrete wall body of doing the seepage prevention processing of right trapezoid structure, and first artifical wetland pond (3) are the artifical wetland pond of upward undercurrent formula, and the artifical wetland pond of second (4) are the artifical wetland pond of horizontal undercurrent formula.
2. The artificial wetland treatment device for rural domestic sewage according to claim 1, characterized in that: the septic tank (1) comprises a first chamber (9), a second chamber (10) and a third chamber (11), through holes (14) are arranged between the first chamber (9) and the second chamber (10) and between the second chamber (10) and the third chamber (11), the top parts of the first chamber (9), the second chamber (10) and the third chamber (11) are all provided with a sewage cleaning port (18), a stirring shaft (16) is arranged in the middle of the first chamber (9) in the vertical direction, the stirring shaft (16) is coaxially connected with a stirring motor (15) arranged at the top of the first chamber (9), septic tank (1) top is equipped with chemical tank (20), chemical tank (20) are equipped with solenoid valve (19) through the first cavity of pipeline intercommunication (9) on the pipeline between chemical tank (20) and first cavity (9), are equipped with liquid biological septic agent in chemical tank (20).
3. The artificial wetland treatment device for rural domestic sewage according to claim 1, characterized in that: the pretreatment tank (2) comprises an anoxic chamber (12) and an aerobic chamber (13), the tops of the anoxic chamber (12) and the aerobic chamber (13) are respectively provided with a sewage cleaning port (18), the anoxic chamber (12) and the aerobic chamber (13) are respectively internally provided with a micropore aeration pipe (21), the micropore aeration pipe (21) is connected with an aeration fan (22) arranged at the top of the pretreatment tank (2) through a vent pipe, guide pipes (23) are respectively arranged inside the anoxic chamber (12) and the aerobic chamber (13) and are respectively communicated with a sewage conveying pipe (6) and the anoxic chamber (12), the right side walls of the anoxic chamber (12) and the aerobic chamber (13) are respectively provided with an L-shaped overflow trough (25), the overflow trough (25) in the anoxic chamber (12) is positioned at a water inlet of the guide pipe (23), the overflow trough (25) in the aerobic chamber (13) is positioned at a water inlet of the first water conveying pipe (7), suspended fillers (24) are arranged in the anoxic chamber (12) and the aerobic chamber (13).
4. The artificial wetland treatment device for rural domestic sewage according to claim 1, characterized in that: first artifical wetland pond (3) are filled from bottom to top has first packing layer (26), second packing layer (27), third packing layer (28), fourth packing layer (29) in proper order, the delivery port of first raceway (7) is located first packing layer (26), and the delivery port department of first raceway (7) is connected with first water distributor (31) of horizontal setting, evenly sets up a plurality of round holes on first water distributor (31), fourth packing layer (29) right side is close to first artifical wetland pond (3) pool wall department and is equipped with fifth packing layer (30), transversely set up first collector pipe (32) in fifth packing layer (30), evenly set up a plurality of round holes on first collector pipe (32), and with the water inlet of second raceway (8) is connected, the last floating plant of fourth packing layer (29).
5. The artificial wetland treatment device for rural domestic sewage according to claim 1, characterized in that: the second artificial wetland pond (4) is sequentially filled with a sixth packing layer (34), a seventh packing layer (35) and an eighth packing layer (36) from left to right, a water outlet of the second water delivery pipe (8) is positioned in the sixth packing layer (34), a water outlet of the second water delivery pipe (8) is connected with a second water distribution pipe (33) which is transversely arranged, a plurality of round holes are uniformly formed in the second water distribution pipe (33), a second water collection pipe (38) is transversely arranged in the eighth packing layer (36), a plurality of round holes are uniformly formed in the second water collection pipe (38) and connected with a water inlet of the drain pipe (39), and emergent aquatic plants are planted on the seventh packing layer (35).
6. The artificial wetland treatment device for rural domestic sewage according to claim 2, characterized in that: the top of the septic tank (1) is also provided with a control box (17), the control box (17) comprises a power module (171), a microcontroller (172), a GPRS wireless communication module (173), a first drive module (174) and a second drive module (175), the power module (171), the GPRS wireless communication module (173), the first drive module (174) and the second drive module (175) are respectively and electrically connected with the microcontroller (172), the microcontroller (172) is in network connection with a remote control terminal (37) through the GPRS wireless communication module (173) and a GPRS wireless network, the microcontroller (172) is electrically connected with the electromagnetic valve (19) through the first drive module (174) and a lead, and the microcontroller (172) is electrically connected with the stirring motor (15) through the second drive module (175) and the lead; the bottom of the first cavity (9) is also fixedly provided with a pressure sensor (40), and the pressure sensor (40) is electrically connected with the microcontroller (172) through a lead.
7. The constructed wetland treatment device for rural domestic sewage according to claim 6, characterized in that: the remote control terminal (37) is a mobile phone.
8. The constructed wetland treatment device for rural domestic sewage according to claim 4, characterized in that: the first packing layer (26) is gravel with the diameter of 6-15mm, the second packing layer (27) is perlite and zeolite, the third packing layer (28) is coarse sand and fly ash, the fourth packing layer (29) is fine sand and loess, and the fifth packing layer (30) is gravel with the diameter of 6-8 mm.
9. The constructed wetland treatment device for rural domestic sewage according to claim 5, characterized in that: the sixth packing layer (34) is gravel and zeolite, the seventh packing layer (35) is perlite, fly ash and loess, and the eighth packing layer (36) is gravel with the diameter of 6-8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921759044.7U CN210945254U (en) | 2019-10-21 | 2019-10-21 | Constructed wetland treatment device for rural domestic sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921759044.7U CN210945254U (en) | 2019-10-21 | 2019-10-21 | Constructed wetland treatment device for rural domestic sewage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210945254U true CN210945254U (en) | 2020-07-07 |
Family
ID=71393758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921759044.7U Expired - Fee Related CN210945254U (en) | 2019-10-21 | 2019-10-21 | Constructed wetland treatment device for rural domestic sewage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210945254U (en) |
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2019
- 2019-10-21 CN CN201921759044.7U patent/CN210945254U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200707 |