CN214244101U - Rural sewage treatment system - Google Patents
Rural sewage treatment system Download PDFInfo
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- CN214244101U CN214244101U CN202022421948.8U CN202022421948U CN214244101U CN 214244101 U CN214244101 U CN 214244101U CN 202022421948 U CN202022421948 U CN 202022421948U CN 214244101 U CN214244101 U CN 214244101U
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- sedimentation tank
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- 239000010865 sewage Substances 0.000 title claims abstract description 56
- 238000012856 packing Methods 0.000 claims abstract description 67
- 238000004062 sedimentation Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000005273 aeration Methods 0.000 claims abstract description 32
- 239000000945 filler Substances 0.000 claims abstract description 23
- 239000010802 sludge Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 11
- 241000196324 Embryophyta Species 0.000 description 42
- 238000000034 method Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 150000003384 small molecules Chemical class 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 244000205574 Acorus calamus Species 0.000 description 1
- 235000006480 Acorus calamus Nutrition 0.000 description 1
- 235000005273 Canna coccinea Nutrition 0.000 description 1
- 240000008555 Canna flaccida Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model discloses a rural sewage treatment system, which comprises an adjusting tank, an anaerobic treatment tank, an aerobic tank, a sedimentation tank, an ecological wetland tank and a water storage tank which are sequentially communicated through pipelines, wherein a grid plate is arranged in the adjusting tank along the sewage flow direction, suspended filler is arranged in an area formed between the grid plate and a water outlet of the adjusting tank, the inner bottom of the sedimentation tank is provided with a sludge hopper, the lower part in the sedimentation tank is detachably provided with a filter plate, the top of the filter plate is provided with a handle, a hard packing layer is arranged above the filter plate, a water inlet of the sedimentation tank is positioned below the filter plate, a water outlet of the sedimentation tank is positioned above the hard packing layer, the ecological wetland tank is internally provided with a multi-stage plant packing layer, plants are arranged above the multi-stage plant packing layer, a water distribution pipe is arranged below the multi-stage plant packing layer, an aeration device is arranged between the adjacent plant packing layers, and the aeration device is respectively communicated with the air blowers positioned outside the ecological wetland tank through connecting pipes, the water outlet of the ecological wetland pool is positioned above the plant filler layer.
Description
Technical Field
The utility model relates to a sewage treatment technical field, concretely relates to rural sewage treatment system.
Background
Along with the continuous promotion of new rural construction work in China, the attention and requirements of the masses of farmers on the quality of living environment are higher and higher along with the improvement of living standard, but the infrastructure of rural areas in China is relatively lagged, and the problem of environmental pollution caused by rural domestic sewage is increasingly serious. In recent years, the problem of rural water pollution has been paid attention to by people and governments, and rural sewage treatment facilities are rapidly built.
At present, the main treatment processes of rural sewage comprise a contact oxidation method, an aeration biological filter method, an anaerobic treatment method and the like. However, the rural sewage treatment system is unstable in quality and quantity and high in volatility, and the existing rural sewage treatment system is generally formed by simply splicing and combining a plurality of treatment modules, so that the operation and maintenance cost is high during use, and the stability of the quality of the effluent water cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the above-mentioned background art, the utility model provides a rural sewage treatment system, its operation and cost of maintenance are saved, and system operation is stable, can high-efficiently remove the pollutant in the sewage, has guaranteed that play water quality of water is up to standard.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a rural sewage treatment system, which comprises an adjusting tank, an anaerobic treatment tank, an aerobic tank, a sedimentation tank, an ecological wetland tank and a water storage tank which are communicated in sequence through pipelines, wherein a grid plate is arranged in the adjusting tank along the sewage flow direction, suspended fillers are arranged in an area formed between the grid plate and a water outlet of the adjusting tank, a sludge hopper is arranged at the inner bottom of the sedimentation tank, a filter plate is detachably arranged at the lower part in the sedimentation tank, a handle is arranged at the top of the filter plate, a hard packing layer is arranged above the filter plate, a water inlet of the sedimentation tank is arranged below the filter plate, the water outlet of the sedimentation tank is arranged above the hard packing layer, a multi-stage plant packing layer is arranged in the ecological wetland tank, plants are arranged above the multi-stage plant packing layer, a water distribution pipe is, the water distribution pipe is communicated with the sedimentation tank through a pipeline, an aeration device is arranged between adjacent plant packing layers, the aeration device is respectively communicated with an air blower positioned on the outer side of the ecological wetland tank through a connecting pipe, and a water outlet of the ecological wetland tank is positioned above the plant packing layers.
The improved sedimentation tank is characterized in that a limiting groove is formed in the side face of the filter plate, a sliding groove is formed in the inner side wall of the sedimentation tank, a sliding rod is arranged in the sliding groove in a transverse sliding mode, one end of the sliding rod penetrates through the side wall of the sedimentation tank and is connected with a lifting block located on the outer side of the sedimentation tank, a limiting block is fixedly arranged at the other end of the sliding rod, a clamping rod is arranged at one end, away from the limiting block, of the sliding rod, the free end of the clamping rod penetrates through the side wall of the sedimentation tank and is clamped into the limiting groove, and a reset spring is sleeved on the outer side, located in the sliding groove, of the sliding rod. When the filter plate cleaning device is used, the pulling block is pulled outwards, the sliding rod drives the clamping rod to move outwards until the clamping rod is completely separated from the limiting groove, the clamping rod loses the fixing effect on the filter plate, and therefore the filter plate can be taken out through the lifting handle to be cleaned or replaced.
The improved structure is characterized in that sliding grooves are formed in the two opposite sides of the inner side wall of the sedimentation tank, and sliding blocks which are arranged in the sliding grooves in a sliding mode are arranged on the outer side of the hard packing layer. The sliding blocks on the outer side of the hard packing layer are matched with the sliding grooves in the inner side wall of the sedimentation tank, so that the hard packing layer can be conveniently taken out and replaced, and the filter plate can not be taken out to be influenced.
The further improvement is that the internal filler of the hard filler layer is formed by mixing activated carbon, limestone and broken stone. The treated water can be further filtered through the hard packing layer, and simultaneously, the odor substances in the sewage can be adsorbed, so that the odor substances in the sewage can be controlled and removed in the treatment process.
The improved structure of the composite packing layer is characterized in that the multistage plant packing layer comprises a first-stage plant packing layer, a second-stage plant packing layer and a third-stage plant packing layer which are sequentially arranged from bottom to top, the first-stage plant packing layer and the second-stage plant packing layer are gravel layers, the third-stage plant packing layer is a ceramsite layer, the particle size of gravel in the first-stage plant packing layer is 40-60mm, the particle size of gravel in the second-stage plant packing layer is 20-40mm, and the particle size of ceramsite in the third-stage plant packing layer is 10-18 mm. Large-particle impurities in the sewage can be filtered out through the rubble layer, the ceramsite in the ceramsite layer has a porous structure, and a large number of microorganisms are attached to the surface of the ceramsite layer, so that small-molecule organic matters in the sewage can be degraded, and the sewage filtering and adsorbing effect is improved.
The further improvement lies in that the aeration device comprises an aeration pipe, the aeration pipe is of an S-shaped structure, the aeration pipe is arranged between adjacent plant packing layers through a fixing ring, and a plurality of aeration holes are uniformly formed in the aeration pipe. Sufficient dissolved oxygen is ensured by arranging the aeration device, and meanwhile, impurities can be prevented from being adhered to the surface of broken stone in the broken stone layer or the surface of ceramsite in the ceramsite layer, so that the filtering and degrading effects of sewage are ensured.
Compared with the prior art, the utility model discloses following beneficial effect has:
in the utility model, the grid plate in the adjusting tank can remove larger suspended matters and floating matters in the sewage, the suspended filler in the adjusting tank can remove macromolecular organic pollutants in the sewage, the load of a subsequent treatment unit is reduced, and the normal and stable operation of the system is ensured; then, the anaerobic treatment tank and the aerobic treatment tank are used for biologically purifying the sewage under the anaerobic condition and the aerobic condition respectively, and no chemical agent is required to be added, so that the energy is saved and the environment is protected; then, the sludge in the sewage is filtered by the filter plate in the sedimentation tank, the sewage is further filtered by the hard packing layer, and meanwhile, the odor substances in the sewage can be adsorbed, so that the odor substances in the sewage are controlled and removed in the treatment process; and finally, the treated sewage enters an ecological wetland pool, phosphorus and nitrogen elements in the sewage are removed under the synergistic action of the planted plants, the multi-stage plant packing layer and microorganisms, the quality of effluent water is ensured, and the sewage enters a water storage pool for repeated use or is directly discharged to the external environment after being treated to reach the standard.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is an overall schematic view of the sewage treatment system in the middle and rural areas of the utility model;
FIG. 2 is a schematic view of the internal structure of the equalizing basin of the present invention;
FIG. 3 is a schematic view of the internal structure of the settling tank of the present invention;
FIG. 4 is an enlarged view taken at A in FIG. 3;
FIG. 5 is a cross-sectional view taken along plane B-B of FIG. 3;
FIG. 6 is a schematic view of the inner structure of the middle ecological wetland pool of the present invention;
FIG. 7 is a schematic structural view of the aeration apparatus of the present invention;
wherein, the specific reference numbers are: adjusting tank 1, grid plate 2, suspended filler 3, anaerobic treatment pond 4, good oxygen pond 5, sedimentation tank 6, sludge bucket 7, filter 8, handle 9, spacing groove 10, block pole 11, sliding tray 12, stopper 13, slide bar 14, carry and draw piece 15, stereoplasm packing layer 16, slider 17, spout 18, ecological wetland pond 19, water distributor 20, one-level plant packing layer 21, second grade plant packing layer 22, tertiary plant packing layer 23, aeration pipe 24, solid fixed ring 25, aeration hole 26, connecting pipe 27, air-blower 28, plant 29, tank 30, reset spring 31.
Detailed Description
The embodiment of the utility model discloses a rural sewage treatment system, as shown in figure 1, comprising an adjusting tank 1, an anaerobic treatment tank 4, an aerobic tank 5, a sedimentation tank 6, an ecological wetland tank 19 and a water storage tank 30 which are sequentially communicated through a pipeline, as shown in figure 2, a grating plate 2 is arranged in the adjusting tank 1 along the sewage flow direction, a suspended filler 3 is arranged in an area formed between the grating plate 2 and the water outlet of the adjusting tank 1, as shown in figure 3, a sludge hopper 7 is arranged at the bottom in the sedimentation tank 6, a filter plate 8 is detachably arranged at the lower part in the sedimentation tank 6, a handle 9 is arranged at the top of the filter plate 8, a hard packing layer 16 is arranged above the filter plate 8, a water inlet of the sedimentation tank 6 is arranged below the filter plate 8, a water outlet of the sedimentation tank 6 is arranged above the hard packing layer 16, as shown in figure 6, a multi-stage plant packing layer is arranged in the ecological wetland tank 19, plants 29 are arranged above the multi-stage plant packing layer, the planting plants 29 can be acorus calamus, lythra, pinwheel grass or canna albo-marginata, water distribution pipes 20 are arranged below the multi-stage plant packing layers, the water distribution pipes 20 are communicated with the sedimentation tank 6 through pipelines, aeration devices are arranged between the adjacent plant packing layers, the aeration devices are respectively communicated with air blowers 28 positioned on the outer side of the ecological wetland tank 19 through connecting pipes 27, and a water outlet of the ecological wetland tank 19 is positioned above the plant packing layers.
Wherein, as shown in fig. 4, the limiting groove 10 has been seted up on the filter 8 side, be equipped with sliding tray 12 on the 6 inside walls of sedimentation tank, lateral sliding is provided with slide bar 14 in sliding tray 12, slide bar 14 one end is run through 6 lateral walls of sedimentation tank and is connected with the pull-up piece 15 that is located the 6 outside of sedimentation tank, slide bar 14 other end is fixed and is provided with stopper 13, stopper 13 is kept away from 14 one end of slide bar and is equipped with block rod 11, 11 free ends of block rod run through 6 lateral walls of sedimentation tank and block to limiting groove 10 in, the outside cover that slide bar 14 is located the inside of sliding tray 12 is equipped with reset spring 31. When the filter plate cleaning machine is used, the pulling block 15 is pulled outwards, the sliding rod 14 drives the clamping rod 11 to move outwards until the clamping rod 11 is completely separated from the limiting groove 10, the clamping rod loses the fixing effect on the filter plate 8, and therefore the filter plate 8 can be taken out through the lifting handle 9 to be cleaned or replaced.
As shown in fig. 5, sliding grooves 18 are formed in two opposite sides of the inner side wall of the sedimentation tank 6, and sliding blocks 17 slidably disposed in the sliding grooves 18 are disposed on the outer side of the hard packing layer 16. The sliding blocks 17 on the outer side of the hard packing layer 16 are matched with the sliding grooves 18 on the inner side wall of the sedimentation tank 6, so that the hard packing layer 16 can be conveniently taken out and replaced, and the filter plate 8 can not be influenced.
Wherein, the internal filler of the hard filler layer 16 is formed by mixing activated carbon, limestone and broken stone. The treated water can be further filtered through the hard filler layer 16, and simultaneously, the odor substances in the sewage can be adsorbed, so that the odor substances in the sewage can be controlled and removed in the treatment process.
The multistage plant packing layer comprises a first-stage plant packing layer 21, a second-stage plant packing layer 22 and a third-stage plant packing layer 23 which are sequentially arranged from bottom to top, the first-stage plant packing layer 21 and the second-stage plant packing layer are gravel layers, the third-stage plant packing layer 23 is a ceramsite layer, the particle size of the gravel in the first-stage plant packing layer 21 is 40-60mm, the particle size of the gravel in the second-stage plant packing layer 22 is 20-40mm, and the particle size of the ceramsite in the third-stage plant packing layer 23 is 10-18 mm. Large-particle impurities in the sewage can be filtered out through the rubble layer, the ceramsite in the ceramsite layer has a porous structure, and a large number of microorganisms are attached to the surface of the ceramsite layer, so that small-molecule organic matters in the sewage can be degraded, and the sewage filtering and adsorbing effect is improved.
As shown in fig. 7, the aeration device includes an aeration pipe 24, the aeration pipe 24 is in an S-shaped structure, the aeration pipe 24 is installed between adjacent plant packing layers through a fixing ring 25, and a plurality of aeration holes 26 are uniformly formed on the aeration pipe 24. Through setting up aeration equipment, guarantee sufficient dissolved oxygen volume, also can avoid the impurity adhesion to the rubble surface in the rubble layer or the haydite surface of adhesion in the haydite layer simultaneously, guaranteed the filtration degradation effect of sewage.
In the utility model, the grid plate 2 in the adjusting tank 1 can remove larger suspended matters and floating matters in the sewage, the suspended filler 3 in the adjusting tank 1 can remove macromolecular organic pollutants in the sewage, the load of a subsequent processing unit is reduced, and the normal and stable operation of the system is ensured; then, the anaerobic treatment tank 4 and the aerobic tank 5 are used for biologically purifying the sewage under the anaerobic condition and the aerobic condition respectively, and no chemical agent is required to be added, so that the energy is saved and the environment is protected; then the sewage is filtered by the filter plate 8 in the sedimentation tank 6, the sewage is further filtered by the hard packing layer 16, and meanwhile, the odor substances in the sewage can be adsorbed, so that the odor substances in the sewage can be controlled and removed in the treatment process, meanwhile, the filter plate 8 and the hard packing layer 16 are detachably mounted, and can be conveniently taken out, replaced and cleaned, and the system operation and maintenance cost is reduced; and finally, the treated sewage enters an ecological wetland tank 19, phosphorus and nitrogen elements in the sewage are removed under the synergistic action of the plants 29, the multi-stage plant packing layers and the microorganisms, the quality of the effluent is ensured, and the treated sewage reaches the standard and then enters a water storage tank 30 for repeated use or is directly discharged to the external environment.
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (5)
1. A rural sewage treatment system is characterized by comprising an adjusting tank, an anaerobic treatment tank, an aerobic tank, a sedimentation tank, an ecological wetland tank and a water storage tank which are sequentially communicated through pipelines, wherein a grid plate is arranged in the adjusting tank along the sewage flow direction, suspended fillers are arranged in an area formed between the grid plate and a water outlet of the adjusting tank, a sludge hopper is arranged at the inner bottom of the sedimentation tank, a filter plate is detachably arranged at the lower part in the sedimentation tank, a handle is arranged at the top of the filter plate, a hard packing layer is arranged above the filter plate, a water inlet of the sedimentation tank is arranged below the filter plate, a water outlet of the sedimentation tank is arranged above the hard packing layer, a multi-stage plant packing layer is arranged in the ecological wetland tank, plants are arranged above the multi-stage plant packing layer, a water distribution pipe is arranged below the multi-stage plant packing layer, the water distribution pipe is communicated with the sedimentation tank through a pipeline, an aeration device is arranged between adjacent plant packing layers, the aeration device is respectively communicated with an air blower positioned on the outer side of the ecological wetland tank through a connecting pipe, and a water outlet of the ecological wetland tank is positioned above the plant packing layers.
2. The rural sewage treatment system of claim 1, wherein a limiting groove is formed on the side surface of the filter plate, a sliding groove is formed on the inner side wall of the sedimentation tank, a sliding rod is transversely slidably arranged in the sliding groove, one end of the sliding rod penetrates through the side wall of the sedimentation tank and is connected with a lifting block positioned outside the sedimentation tank, a limiting block is fixedly arranged at the other end of the sliding rod, a clamping rod is arranged at one end of the limiting block, which is far away from the sliding rod, the free end of the clamping rod penetrates through the side wall of the sedimentation tank and is clamped in the limiting groove, and a return spring is sleeved on the outer side of the sliding rod, which is positioned in the sliding groove.
3. The rural sewage treatment system of claim 2, wherein sliding grooves are formed in opposite sides of the inner side wall of the sedimentation tank, and sliding blocks slidably arranged in the sliding grooves are arranged outside the hard packing layer.
4. The rural sewage treatment system of claim 1, wherein the multi-stage plant filler layer comprises a first-stage plant filler layer, a second-stage plant filler layer and a third-stage plant filler layer which are sequentially arranged from bottom to top, the first-stage plant filler layer and the second-stage plant filler layer are gravel layers, the third-stage plant filler layer is a ceramsite layer, the particle size of the gravel in the first-stage plant filler layer is 40-60mm, the particle size of the gravel in the second-stage plant filler layer is 20-40mm, and the particle size of the ceramsite in the third-stage plant filler layer is 10-18 mm.
5. The rural sewage treatment system of claim 1, wherein the aeration device comprises an aeration pipe, the aeration pipe is of an S-shaped structure, the aeration pipe is arranged between adjacent plant packing layers through a fixing ring, and a plurality of aeration holes are uniformly formed in the aeration pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022421948.8U CN214244101U (en) | 2020-10-27 | 2020-10-27 | Rural sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022421948.8U CN214244101U (en) | 2020-10-27 | 2020-10-27 | Rural sewage treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN214244101U true CN214244101U (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022421948.8U Active CN214244101U (en) | 2020-10-27 | 2020-10-27 | Rural sewage treatment system |
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| Country | Link |
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| CN (1) | CN214244101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804542A (en) * | 2022-05-26 | 2022-07-29 | 中国科学院生态环境研究中心 | Ecological water filtering pond for water ecological restoration |
-
2020
- 2020-10-27 CN CN202022421948.8U patent/CN214244101U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804542A (en) * | 2022-05-26 | 2022-07-29 | 中国科学院生态环境研究中心 | Ecological water filtering pond for water ecological restoration |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A rural sewage treatment system Effective date of registration: 20230213 Granted publication date: 20210921 Pledgee: Industrial Bank Co.,Ltd. Shanghai Zhangyang Sub branch Pledgor: SHANGHAI JIANGZHE ENVIRONMENT ENGINEERING TECHNOLOGY Co.,Ltd. Registration number: Y2023310000029 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20210921 Pledgee: Industrial Bank Co.,Ltd. Shanghai Zhangyang Sub branch Pledgor: SHANGHAI JIANGZHE ENVIRONMENT ENGINEERING TECHNOLOGY Co.,Ltd. Registration number: Y2023310000029 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A rural sewage treatment system Granted publication date: 20210921 Pledgee: Industrial Bank Co.,Ltd. Shanghai Zhangyang Sub branch Pledgor: SHANGHAI JIANGZHE ENVIRONMENT ENGINEERING TECHNOLOGY Co.,Ltd. Registration number: Y2024310000036 |