CN216314885U - Pond circulating water aquaculture device - Google Patents
Pond circulating water aquaculture device Download PDFInfo
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- CN216314885U CN216314885U CN202122837375.1U CN202122837375U CN216314885U CN 216314885 U CN216314885 U CN 216314885U CN 202122837375 U CN202122837375 U CN 202122837375U CN 216314885 U CN216314885 U CN 216314885U
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- ecological
- pond
- tail water
- captive
- water treatment
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 238000009360 aquaculture Methods 0.000 title claims description 17
- 244000144974 aquaculture Species 0.000 title claims description 17
- 239000010865 sewage Substances 0.000 claims abstract description 35
- 241000195493 Cryptophyta Species 0.000 claims description 25
- 239000002131 composite material Substances 0.000 claims description 25
- 238000000926 separation method Methods 0.000 claims description 24
- 102000004169 proteins and genes Human genes 0.000 claims description 19
- 108090000623 proteins and genes Proteins 0.000 claims description 19
- 238000009826 distribution Methods 0.000 claims description 12
- 238000001179 sorption measurement Methods 0.000 claims description 11
- 239000002689 soil Substances 0.000 claims description 9
- 230000003134 recirculating effect Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000009395 breeding Methods 0.000 claims description 2
- 230000001488 breeding effect Effects 0.000 claims description 2
- 239000002657 fibrous material Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 238000000746 purification Methods 0.000 abstract description 22
- 238000005728 strengthening Methods 0.000 abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000013505 freshwater Substances 0.000 description 4
- 239000008213 purified water Substances 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- YFYIWIZSIVZILB-UHFFFAOYSA-N N.[P] Chemical compound N.[P] YFYIWIZSIVZILB-UHFFFAOYSA-N 0.000 description 2
- 238000005276 aerator Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009342 intercropping Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001706 oxygenating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to a pond circulating water culture device which comprises a land base, an ecological contact conserving pond and an ecological captive gutter channel, wherein the ecological contact conserving pond is arranged inside the land base, the ecological captive gutter channel is positioned at the right side position of the ecological contact conserving pond, the bottom end of the ecological captive gutter channel is communicated with a drain pipe, the right side position of the ecological captive gutter channel is provided with a sewage collecting pond, and a tail water treatment box is erected above the sewage collecting pond. The tail water treatment tank is arranged above a land base, a land base tail water physical and biological strengthening treatment system is established, and is separated from the ecological captive flume, so that the tail water treatment efficiency is improved, the culture area of the ecological captive flume is greatly expanded compared with the traditional culture area, the culture area is enlarged, the treatment pressure of a purification area is reduced, and the tail water treatment efficiency is high; the ecological contact conservation pond is utilized to stabilize water quality, comprehensive regulation and control of the water body of the ecological conservation pond are realized, and the utilization rate of water resources is improved.
Description
Technical Field
The utility model relates to the technical field of pond circulating water aquaculture, in particular to a pond circulating water aquaculture device.
Background
At present, the supply of aquatic products increasingly depends on the aquaculture industry, and the aquaculture industry generates a large amount of waste water and discharges the waste water without treatment, so that the water resource shrinkage of the aquaculture is further aggravated. According to statistics, the water consumption of the Chinese fresh water pond reaches 1.5 multiplied by 1012m3 every year, which is equivalent to 5.4% of the total amount of Chinese fresh water resources. Wherein, the total nitrogen discharged by the fresh water ponds in China is about 3.8 multiplied by 105t and the total phosphorus discharged by the fresh water ponds in China is about 3.2 multiplied by 104t each year. The discharge of a large amount of culture wastewater causes negative effects to a certain extent on the natural ecosystem environment. The sustainable development of aquaculture is seriously influenced by the increasing of the demand of aquatic products and the difficulty in improving the production capacity of fishery, and the purification treatment and the recycling of aquaculture tail water become the key for solving the problem.
The pond of the existing pond circulating water culture system is divided into a culture area and an ecological purification area, the ecological purification area occupies a large amount of pond area, the comprehensive utilization rate of the pond is not high, the tail water treatment efficiency of the existing pond circulating water culture system is not ideal, the average removal rate of total phosphorus, total nitrogen and biochemical oxygen demand is low, the oxygen increasing efficiency is not high when the temperature is high, and the recovery efficiency of wastes such as fish excrement is low.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a pond circulating water culture device, which aims to solve the problems that the pond of the existing pond circulating water culture system is divided into a culture area and an ecological purification area, the ecological purification area occupies a large amount of pond area, the comprehensive utilization rate of the pond is not high, the tail water treatment efficiency of the existing pond circulating water culture system is not ideal, the average removal rate of total phosphorus, total nitrogen and biochemical oxygen demand is low, the oxygen increasing efficiency is not high when the temperature is high, and the recovery efficiency of wastes such as fish excrement is low.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a pond recirculating aquaculture device, includes land-based, ecological contact culvert pond and ecological containment tye, ecological contact culvert pond sets up in the inside of land-based, ecological containment tye is in the right side position of ecological contact culvert pond, the bottom through connection of ecological containment tye has the drain pipe, and the right side position of ecological containment tye has seted up the sewage collection pond, the tail water treatment case has been erect to the sewage collection pond top, the right side wall through connection of tail water treatment case has the soil pick-up pump, the left side position through connection of tail water treatment case has the protein separation chamber, the inside fixed of protein separation chamber is inlayed and is had the air supporting clarifier, and the left side position through connection of protein separation chamber has biofilm reactor, the left side position through connection of biofilm reactor has compound little algae-based treater.
The present invention in a preferred example may be further configured to: the tail water treatment tank is located land-based top right side position, the bottom through connection of soil pick-up pump has the soil pick-up pipe, and the soil pick-up pump is through soil pick-up pipe and dirty pond through connection of collection.
The present invention in a preferred example may be further configured to: the top end of the sewage suction pump is communicated with the tail water treatment tank through a pipeline, one end, located inside the tail water treatment tank, of the sewage suction pump pipeline is connected with a water distribution disc, and the bottom of the water distribution disc is distributed in a plurality of through holes in an annular mode.
The present invention in a preferred example may be further configured to: the inside of tail water treatment case is provided with the filter screen, the bottom of filter screen is provided with active adsorption layer, active adsorption layer is made by activated carbon fiber material.
The present invention in a preferred example may be further configured to: the left end and the right end of the biofilm reactor are respectively provided with a pipeline in an inserting mode, and the two ends of the biofilm reactor are respectively communicated with the protein separation cavity and the composite microalgae algae-based processor through the pipelines.
The present invention in a preferred example may be further configured to: the top surface of the composite microalgae algae-based processor is fixedly embedded with an installation seat, and an ultraviolet lamp tube is arranged on the inner side wall of one end of the installation seat, which is positioned in the composite microalgae algae-based processor.
The present invention in a preferred example may be further configured to: a backflow pipe is fixedly inserted into the bottom end of the left side wall of the composite microalgae algae-based processor, and one port of the backflow pipe, which is far away from the composite microalgae algae-based processor, is positioned inside the ecological contact conserving pond.
In summary, the utility model includes at least one of the following beneficial technical effects:
1. in the using process, the tail water treatment tank and the sewage suction pump are arranged, the culture tail water of the ecological captive gutter channel is discharged into the sewage collection tank through the drain pipe, excrement and residual bait in the sewage collection tank are pumped to the tail water treatment tank by the sewage suction pump for treatment, the tail water treatment tank is arranged above a land base, a land base tail water physical and biological strengthening treatment system is established, the tail water treatment system is separated from the ecological captive gutter channel, the tail water treatment efficiency is improved, the culture area of the ecological captive gutter channel is greatly expanded compared with the traditional culture area, and the culture capacity of the ecological culture area of the ecological captive gutter channel is increased.
2. In the using process of the utility model, the filter screen and the active adsorption layer are arranged, the tail water entering the tail water treatment tank is uniformly distributed by the water distribution disc and then discharged to the surface of the filter screen for primary filtration, and then is continuously downwards filtered and adsorbed by fine impurities through the active adsorption layer.
3. In the using process, the air-floating clarifier and the biofilm reactor are arranged, tail water after solid-liquid separation enters the protein separation cavity, air is introduced into the tail water by the air-floating clarifier to enable a water body to generate a large amount of micro bubbles which are attached to impurity particles, the density of the micro bubbles is smaller than that of the water and the micro bubbles float to the water surface, protein air-floating separation is realized, then the micro bubbles enter the biofilm reactor to perform denitrification and dephosphorization pretreatment, the tail water purification is started from many aspects, the tail water treatment effect is good, and the working efficiency is effectively improved.
4. In the using process, the composite microalgae algae-based processor and the ultraviolet lamp tube are arranged, the tail water treated by the biofilm reactor enters the composite microalgae algae-based processor, the composite microalgae algae-based processor is used for deep purification treatment, the purified water body is subjected to ultraviolet disinfection by the ultraviolet lamp tube to realize complete purification, and finally the purified water body flows into the ecological contact conserving pond through the return pipe, so that the treatment pressure of a purification area is further reduced, and the purification efficiency is improved.
5. In the using process, the ecological contact conserving pond is arranged, submerged plants and cut-off plants are planted in the ecological contact conserving pond to construct an underwater forest, the water body is oxygenated and activated by the solar aerator, the ammonia phosphorus in the water body is consumed by the intercropping filter feeding organisms, and the water regulating product is added to reduce bottom mud, stabilize water quality, realize comprehensive regulation and control of the water body of the ecological conserving pond and improve the utilization rate of water resources.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a land-based cross-sectional structure of the present invention;
FIG. 3 is a schematic cross-sectional view of a tail water treatment tank according to the present invention;
FIG. 4 is a schematic diagram of the structure of the composite microalgae algal-based processor of the present invention.
Reference numerals: 1. land-based; 2. ecological contact conserving ponds; 3. an ecological captive breeding flume; 4. a drain pipe; 5. a sewage collecting tank; 6. a tail water treatment tank; 601. filtering with a screen; 602. an active adsorption layer; 7. a sewage suction pump; 8. a sewage pumping pipe; 9. a water distribution plate; 10. a protein separation chamber; 11. an air-float clarifier; 12. a biofilm reactor; 13. compounding microalgae algae-based processor; 14. a mounting seat; 1401. an ultraviolet lamp tube; 15. a return pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, 2, 3 and 4, the present invention provides the following technical solutions: a pond circulating water culture device comprises a land base 1, an ecological contact conserving pond 2 and an ecological captive flume 3, wherein the ecological contact conserving pond 2 is arranged inside the land base 1, the ecological captive flume 3 is positioned at the right side of the ecological contact conserving pond 2, the bottom end of the ecological captive flume 3 is communicated with a drain pipe 4, and a sewage collecting tank 5 is arranged at the right side position of the ecological captive gutter channel 3, a tail water treatment tank 6 is erected above the sewage collecting tank 5, the right side wall of the tail water treatment tank 6 is connected with a sewage suction pump 7 in a through way, the left side position of the tail water treatment tank 6 is connected with a protein separation cavity 10 in a through way, an air-float clarifier 11 is fixedly embedded in the protein separation cavity 10, and the left side position of the protein separation cavity 10 is connected with a biofilm reactor 12 in a penetrating way, and the left side position of the biofilm reactor 12 is connected with a composite microalgae algae-based processor 13 in a penetrating way.
Referring to fig. 1 and 3, specifically, the tail water treatment tank 6 is located at the right side position above the land base 1, the bottom end of the sewage suction pump 7 is connected with a sewage suction pipe 8 in a penetrating manner, and the sewage suction pump 7 is connected with the sewage collection tank 5 in a penetrating manner through the sewage suction pipe 8; the top end of the sewage suction pump 7 is communicated with the tail water treatment tank 6 through a pipeline, one end of the pipeline of the sewage suction pump 7, which is positioned in the tail water treatment tank 6, is connected with a water distribution disc 9, and the bottoms of the water distribution discs 9 are distributed in a plurality of through holes in an annular manner; in the embodiment, the culture tail water of the ecological captive gutter channel 3 is discharged into the sewage collection pool 5 through the drain pipe 4, the sewage suction pump 7 pumps excrement and residual bait in the sewage collection pool 5 to the tail water treatment tank 6 for treatment, the tail water treatment tank 6 is arranged above the land base 1 to establish a land base tail water physical and biological strengthening treatment system which is designed to be separated from the ecological captive gutter channel 3 to improve the tail water treatment efficiency, so that the culture area of the ecological captive gutter channel 3 is greatly expanded compared with the traditional culture area, the culture accommodation capacity of the ecological culture area of the ecological captive gutter channel 3 is increased, the tail water entering the tail water treatment tank 6 is uniformly distributed by the water distribution disc 9 and then discharged to the surface of the filter screen 601 for preliminary filtration, and then further fine impurity filtration and adsorption are continuously carried out downwards through the active adsorption layer 602, the solid-liquid separation design of two-stage distribution can effectively reduce the subsequent treatment pressure of the purification area and effectively improve the working quality and efficiency.
Referring to fig. 1 and 4, specifically, the left and right ends of the biofilm reactor 12 are respectively provided with a pipeline in a penetrating manner, and the two ends of the biofilm reactor 12 are respectively communicated with the protein separation cavity 10 and the composite microalgae algae-based processor 13 through the pipelines; the top surface of the composite microalgae algae-based processor 13 is fixedly embedded with an installation seat 14, the installation seat 14 is provided with an ultraviolet lamp 1401 at the inner side wall of one end of the installation seat 14 positioned in the composite microalgae algae-based processor 13, in the embodiment, tail water after solid-liquid separation enters the protein separation cavity 10, the air floating clarifier 11 leads air into the tail water to lead the water body to generate a large amount of micro bubbles which are attached to impurity particles and float to the water surface with the density less than that of water to realize protein air floating separation, then the tail water enters the biofilm reactor 12 for denitrification and dephosphorization pretreatment, tail water purification is carried out in many ways, the tail water treatment effect is good, the working efficiency is effectively improved, the tail water treated by the biofilm reactor 12 enters the composite microalgae algae-based processor 13, the composite microalgae algae-based processor 13 carries out deep purification treatment, and the purified water body is disinfected by the ultraviolet lamp 1401, and the sewage is completely purified and finally flows into the ecological contact conserving pond 2 through the return pipe 15, so that the treatment pressure of a purification area is further reduced, and the purification efficiency is improved.
Referring to fig. 1 and 2, specifically, a return pipe 15 is fixedly inserted at the bottom end of the left side wall of the composite microalgae algae-based processor 13, and a port of the return pipe 15, which is far away from the composite microalgae algae-based processor 13, is located inside the ecological contact conserving pond 2.
The utility model has the following use flow and working principle: when the utility model is used, firstly, the culture tail water of the ecological captive gutter channel 3 is discharged into the sewage collection pool 5 through the drain pipe 4, the sewage suction pump 7 pumps the excrement and the residual bait in the sewage collection pool 5 to the tail water treatment tank 6 for treatment, the tail water treatment tank 6 is arranged above the land base 1, a land base tail water physical and biological strengthening treatment system is established, the tail water treatment efficiency is improved by the design of separating from the ecological captive gutter channel 3, the culture area of the ecological captive gutter channel 3 is greatly expanded compared with the traditional culture area, the culture holding capacity of the ecological culture area of the ecological captive gutter channel 3 is increased, the tail water entering the tail water treatment tank 6 is uniformly distributed by the water distribution plate 9 and then discharged to the surface of the filter screen 601 for preliminary filtration, then the tail water continues to pass through the active adsorption layer 602 for further fine impurity filtration and adsorption, the solid-liquid separation design of two-stage distribution can effectively reduce the subsequent treatment pressure of the purification area, the working quality and efficiency are effectively improved, the tail water after solid-liquid separation enters a protein separation cavity 10, an air floating clarifier 11 leads air into the tail water to enable the water body to generate a large amount of micro-fine bubbles which are attached to impurity particles and float to the water surface with density less than that of water, thereby realizing protein air floating separation, then the tail water enters a biofilm reactor 12 for denitrification and dephosphorization pretreatment, the tail water purification is performed by starting from many aspects, the tail water treatment effect is good, the working efficiency is effectively improved, the tail water treated by the biofilm reactor 12 enters a composite microalgae algae-based processor 13 for deep purification treatment by the composite microalgae-based processor 13, the purified water body is sterilized by ultraviolet rays through an ultraviolet lamp 1401 to realize complete purification, finally the tail water flows into an ecological contact conserving pond 2 through a return pipe 15 to further reduce the treatment pressure of a purification area, the purification efficiency is improved, and submerged plants are planted in the ecological contact conserving pond 2, The method comprises the steps of constructing an underwater forest by water-cut plants, oxygenating water by using a solar aerator, consuming ammonia phosphorus in the water by matching with intercropping filter feeding organisms, adding a water transfer product to reduce bottom mud, stabilizing water quality, realizing comprehensive regulation and control of the water in the ecological conservation pond, improving the utilization rate of water resources, and finally returning the oxygen-enriched upper-layer water in the ecological contact conservation pond 2 to the ecological captive flume 3 to finish recycling of the tail water of the pond.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.
Claims (7)
1. The utility model provides a pond recirculating aquaculture device, includes land-based (1), ecological contact conserving pond (2) and ecological captive gutter channel (3), its characterized in that: the ecological contact conserving pond (2) is arranged in the land base (1), the ecological captive flume (3) is positioned at the right side of the ecological contact conserving pond (2), the bottom end of the ecological captive gutter channel (3) is communicated with a drain pipe (4), a sewage collecting tank (5) is arranged at the right side of the ecological captive breeding flume (3), a tail water treatment tank (6) is erected above the sewage collecting tank (5), the right side wall of the tail water treatment tank (6) is connected with a sewage suction pump (7) in a run-through way, the left side position of the tail water treatment box (6) is communicated with a protein separation cavity (10), an air-floating clarifier (11) is fixedly embedded in the protein separation cavity (10), and the left side position of the protein separation cavity (10) is communicated with a biofilm reactor (12), the left side position of the biofilm reactor (12) is connected with a composite microalgae algae-based processor (13) in a penetrating way.
2. A pond recirculating aquaculture device in accordance with claim 1, wherein: tail water treatment tank (6) are located land base (1) top right side position, the bottom through connection of soil pick-up pump (7) has soil pick-up pipe (8), and soil pick-up pump (7) through soil pick-up pipe (8) and dirty pond (5) through connection of collection.
3. A pond recirculating aquaculture device according to claim 2, characterized in that: the top of sewage suction pump (7) is through-connected with tail water treatment tank (6) through the pipeline, and the end that sewage suction pump (7) pipeline is located tail water treatment tank (6) inside is connected with water distribution dish (9), water distribution dish (9) bottom "annular" distributes in a plurality of through-holes.
4. A pond recirculating aquaculture device in accordance with claim 1, wherein: the inside of tail water treatment case (6) is provided with filter screen (601), the bottom of filter screen (601) is provided with active adsorption layer (602), active adsorption layer (602) are made by activated carbon fiber material.
5. A pond recirculating aquaculture device in accordance with claim 1, wherein: the left end and the right end of the biofilm reactor (12) are respectively provided with a pipeline in an inserting mode, and the two ends of the biofilm reactor (12) are respectively communicated with the protein separation cavity (10) and the composite microalgae algae-based processor (13) through the pipelines.
6. A pond recirculating aquaculture device in accordance with claim 1, wherein: an installation seat (14) is fixedly embedded in the top surface of the composite microalgae algae-based processor (13), and an ultraviolet lamp tube (1401) is installed on the inner side wall of one end, located inside the composite microalgae algae-based processor (13), of the installation seat (14).
7. A pond recirculating aquaculture device in accordance with claim 1, wherein: a return pipe (15) is fixedly inserted into the bottom end of the left side wall of the composite microalgae algae-based processor (13), and one port of the return pipe (15), which is far away from the composite microalgae algae-based processor (13), is positioned inside the ecological contact conserving pond (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122837375.1U CN216314885U (en) | 2021-11-18 | 2021-11-18 | Pond circulating water aquaculture device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122837375.1U CN216314885U (en) | 2021-11-18 | 2021-11-18 | Pond circulating water aquaculture device |
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| CN216314885U true CN216314885U (en) | 2022-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117342732A (en) * | 2023-10-29 | 2024-01-05 | 江苏省海洋水产研究所 | Ectopic ecological treatment method and device for tail water of aquaculture pond |
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2021
- 2021-11-18 CN CN202122837375.1U patent/CN216314885U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117342732A (en) * | 2023-10-29 | 2024-01-05 | 江苏省海洋水产研究所 | Ectopic ecological treatment method and device for tail water of aquaculture pond |
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Effective date of registration: 20240226 Address after: 330000 room 452, floor 4, building 1, Linrui youth apartment, No. 955, rulehu street, Linkong Economic Zone, Nanchang City, Jiangxi Province Patentee after: Nanchang Environmental Science Research Institute Co.,Ltd. Country or region after: China Address before: Room 407, 399 rulehu street, Zhiguan District, Ganjiang New District, Nanchang City, Jiangxi Province Patentee before: Jiangxi Zhongjiang Environmental Protection Group Co.,Ltd. Country or region before: China |