CN113519438A - Low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system - Google Patents
Low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system Download PDFInfo
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- CN113519438A CN113519438A CN202110870533.5A CN202110870533A CN113519438A CN 113519438 A CN113519438 A CN 113519438A CN 202110870533 A CN202110870533 A CN 202110870533A CN 113519438 A CN113519438 A CN 113519438A
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- biological filter
- hollow cylinder
- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 238000000746 purification Methods 0.000 title claims abstract description 27
- 238000005265 energy consumption Methods 0.000 title claims abstract description 16
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 16
- 238000005273 aeration Methods 0.000 claims abstract description 16
- 239000000945 filler Substances 0.000 claims abstract description 14
- 239000010865 sewage Substances 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000009360 aquaculture Methods 0.000 claims description 10
- 244000144974 aquaculture Species 0.000 claims description 10
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 abstract description 5
- 238000006213 oxygenation reaction Methods 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000004062 sedimentation Methods 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- -1 is 3: 1-5: 1 Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/003—Aquaria; Terraria
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/045—Filters for aquaria
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a low-energy-consumption high-efficiency in-situ air-lift type circulating water purification and culture system, which comprises a culture pond, a biological filter arranged in the culture pond and a sewage collecting and discharging device arranged at the bottom of the culture pond; the biological filter is internally provided with a filler, an aeration head and an air stripping device; the aeration head is positioned at the bottom of the biological filter, and the other end of the aeration head is connected with an air pump; the air lifting device comprises an air lifting pipe arranged in the biological filter and an air lifting water outlet pipe arranged at the upper part of the air lifting pipe, and the height of the air lifting water outlet pipe is higher than the water surface of the culture pond. The system has the comprehensive functions of air stripping aeration oxygenation, water body circulation flow driving, annular vortex sedimentation dirt collection removal, biological filtration water body purification and the like. The system has compact structure and small occupied area, can continuously and stably operate, solves the problems of low cost, low consumption, high efficiency, pollutant removal, water purification and water body circulation, also solves the problem of solid waste recovery, and simultaneously improves the space utilization rate of the culture pond.
Description
Technical Field
The invention relates to the technical field of circulating water culture water purification, in particular to a low-energy-consumption and high-efficiency in-situ air-lift type circulating water purification culture system.
Background
The circulating water culture mode becomes the development trend of the aquaculture industry, and after a series of water purification treatments such as physical sedimentation, biological filtration, sterilization and disinfection and the like are carried out on culture wastewater, the pollutant content in a water body can be effectively reduced, and the culture wastewater is recirculated and flows back into a culture pond to realize the recycling of water. The circulating water culture has important effects on reducing the discharge of culture sewage and improving the utilization rate of water resources.
Pollutants in the recirculating aquaculture wastewater mainly come from bait residues, excrement generated by cultured animals, debris and debris shed from organisms and the like, which result in high inorganic nitrogen concentration and low C/N ratio in the water body. The purification of the aquaculture wastewater, including the low-consumption and high-efficiency removal of pollutants such as solid particles, ammonia nitrogen and the like in a water body, is one of the key links in the recirculating aquaculture.
Disclosure of Invention
The invention aims to provide a low-energy-consumption high-efficiency in-situ air-lift type circulating water purification and culture system, which can purify water with low consumption and high efficiency, recycle culture water, strengthen the recovery of solid wastes and improve the space utilization rate of a culture pond. The system can continuously and stably operate, solves the problems of low cost, low consumption, high efficiency, pollutant removal and water quality purification, also solves the problem of solid waste recovery, and simultaneously improves the space utilization rate of the culture pond.
The invention is realized by adopting the following technical scheme:
a low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system comprises a culture pond, a biological filter arranged in the culture pond and a sewage collecting and discharging device arranged at the bottom of the culture pond; the biological filter is internally provided with a filler, an aeration head and an air stripping device; the aeration head is positioned at the bottom of the biological filter, and the other end of the aeration head is connected with an air pump; the air lifting device comprises an air lifting pipe arranged in the biological filter and an air lifting water outlet pipe arranged at the upper part of the air lifting pipe, and the height of the air lifting water outlet pipe is higher than the water surface of the culture pond.
In the above technical scheme, further, the biofilter is fixed at the bottom of the culture pond through a support frame.
Furthermore, the culture pond is generally round, and the bottom of the culture pond is funnel-shaped; the biological filter is positioned at the center of the culture pond so as to improve the space utilization rate of the culture pond.
Further, the biological filter is cylindrical, and the bottom of the biological filter is in an inverted cone shape; the bottom inclination of the biological filter is not less than that of the culture pond, so that solid particles can be precipitated and accumulated towards the center of the bottom of the culture pond along with the annular vortex.
Further, the biological filter comprises an outer cylindrical hollow cylinder and an inner cylindrical hollow cylinder which are coaxially arranged, and the diameter ratio of the outer cylindrical hollow cylinder to the inner cylindrical hollow cylinder is 2: 1-6: 1; the height of the outer cylindrical hollow cylinder is higher than the water surface height of the culture pond, and the height of the inner cylindrical hollow cylinder is lower than the water surface height of the culture pond; the bottom of the outer cylindrical hollow cylinder is designed into a filter screen, and the side wall of the inner cylindrical hollow cylinder and the bottom of the inner cylindrical hollow cylinder are sealed.
Further, the filler is a hydrophilic suspended filler.
Furthermore, the ratio of the height of the part of the air stripping pipe, which is positioned under water, to the height of the part of the air stripping pipe, which is positioned above water, is 3: 1-5: 1, and a water outlet at the tail end of the air stripping water outlet pipe is in an inclined downward direction, so that the water outlet is facilitated to drive the aquaculture water body to form an annular vortex.
In the invention, the center of each culture pond is provided with the cylindrical biological filter, so that the space utilization rate and the water purification efficiency of the culture pond are improved. The air lifting device is a device which can lift water with low energy consumption and drive the water body to flow, is beneficial to the water body of the culture pond to form a rotating vortex, and can intensively push solid particles in the water body to precipitate and enrich towards the center of the bottom of the pond and enter the sewage collecting and discharging device, and the sewage collecting and discharging device can recover sludge periodically or according to requirements. The aquaculture water is filtered by a filter screen at the bottom of the biological filter, the water quality is purified by internal biological filtration, and the aeration and oxygenation are carried out, then the air is lifted and flows back to the aquaculture pond, so that circulation is realized.
The invention has the following advantages and effects:
1. the invention has the comprehensive functions of air stripping aeration oxygenation, water body circulation flow driving, annular vortex sedimentation dirt collection removal, biological filtration water body purification and the like. The water purifying device is centralized in the center inside the culture pond, occupies a small area, has a compact structure, simple equipment and low economic cost, and improves the space utilization rate of the culture pond.
2. According to the invention, the water purifying device mainly comprising the biological filter is arranged in the center of each culture pond, so that the water purifying efficiency is improved. The biological filter is designed into a coaxial inner and outer cylindrical hollow cylinder shape, so that the contact path of the water body and the filler is prolonged, ammonia nitrogen in water can be removed through full nitrification, the purification effect is further ensured, and the purification efficiency is improved.
3. The invention utilizes the air lifting action to lift the water body and make the water body flow back to the culture pond to form circulation, and can directly utilize the aeration air source without arranging a conventional water pump, thereby achieving the effects of saving electricity and energy.
4. According to the invention, the inclined downward direction of the water outlet at the tail end of the air stripping water outlet pipe is utilized to enable the lifted water body to flow back to the culture pond and form a certain driving force at the same time, so that the water body in the culture pond is driven to slowly rotate to form an annular vortex, and the precipitation and sewage collection recovery is enhanced.
Drawings
FIG. 1 is a schematic view of the cross-sectional structure of the low-energy efficient in-situ air-lift type circulating water purification cultivation system of the present invention.
FIG. 2 is a top view of the low energy consumption high efficiency in situ air stripping type circulating water purification aquaculture system of the present invention.
Detailed Description
Fig. 1 shows a low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system, which comprises a culture pond 1, a biological filter 2, an air-lift device (comprising an air-lift pipe 9 and an air-lift water outlet pipe 10) and a sewage and sewage collecting device 4.
The biological filter 2 is fixed inside the culture pond 1 through a support frame 5, and a filler 6 is arranged in the biological filter 2. The air stripping water outlet pipe 10 is connected to the upper part of the air stripping pipe 9, and the aeration head 7 is connected with the air pump 8 and then arranged at the bottom of the air stripping pipe 9. The stripper tube 9 is arranged inside the biological filter 2. The sewage collecting and discharging device 4 is arranged at the central position of the bottom of the culture pond 1.
The culture ponds 1 are generally circular, the bottoms of the culture ponds are funnel-shaped, and a biological filter 2 is arranged at the center of each culture pond 1 to improve the space utilization rate of the culture ponds 1.
The biological filter 2 comprises an outer cylindrical hollow cylinder and an inner cylindrical hollow cylinder which are coaxially arranged, the diameter ratio of the outer cylindrical hollow cylinder to the inner cylindrical hollow cylinder is preferably 2: 1-6: 1, the height of the outer cylindrical hollow cylinder is higher than the height of the water surface of the culture pond 1, and the height of the inner cylindrical hollow cylinder is lower than the height of the water surface of the culture pond 1; the bottom of the inner and outer cylindrical hollow cylinder is connected together, the bottom of the outer cylindrical hollow cylinder is designed into a filter screen 3, and the side wall of the inner and outer cylindrical hollow cylinder and the bottom of the inner cylindrical hollow cylinder are sealed. The culture water body sequentially completes microfiltration, biological filtration and aeration oxygenation in the biological filter 2.
The filler 6 is hydrophilic suspended filler.
The air-lift water outlet pipe 10 is connected to the upper portion, higher than the water surface of the culture pond 1, of the air-lift pipe 9, the height ratio of the underwater portion of the air-lift pipe 9 to the water surface of the culture pond is preferably 3: 1-5: 1, and a water outlet at the tail end of the air-lift water outlet pipe 10 is in an inclined downward direction so as to facilitate water outlet to drive the culture water body to form annular vortex.
Solid particles in the water body enter the sewage collection and discharge device 4 along with the annular vortex sedimentation and enrichment, and the sewage collection and discharge device 4 recovers sludge periodically or according to the requirement. The culture water is microfiltered by a filter screen 3 at the bottom of the biological filter 2 to remove solid particles, then enters an outer cylindrical hollow cylinder of the biological filter 2, is biologically filtered by a filler 6 from bottom to top and then enters an inner cylindrical hollow cylinder, and the filler 6 is a hydrophilic suspended filler and is an important place for removing ammonia nitrogen by the attachment growth of a biological membrane and the occurrence of nitration reaction. The water in the inner cylindrical hollow cylinder flows through the aeration head 7 for oxygenation and then rises to the air stripping water outlet pipe 10 along the air stripping pipe 9 under the action of air stripping, a water outlet at the tail end of the air stripping water outlet pipe 10 is inclined downwards and tangentially discharged in the horizontal plane, and the water is guided to flow back to the culture pond 1 and simultaneously forms a certain driving force (as shown in figure 2) to drive the water in the culture pond to form an annular vortex, so that the purification and circulation of the circulating water culture water are realized.
Claims (7)
1. A low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system is characterized by comprising a culture pond (1), a biological filter (2) arranged in the culture pond (1) and a sewage collecting and discharging device (4) arranged at the bottom of the culture pond (1); a filler (6), an aeration head (7) and an air stripping device are arranged in the biological filter (2); the aeration head (7) is positioned at the bottom of the biological filter (2), and the other end of the aeration head is connected with an air pump (8); the air stripping device comprises an air stripping pipe (9) arranged in the biological filter (2) and an air stripping water outlet pipe (10) arranged at the upper part of the air stripping pipe (9), and the height of the air stripping water outlet pipe (10) is higher than the water surface of the culture pond (1).
2. The low-energy-consumption high-efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 1, wherein the biofilter (2) is fixed at the bottom of the cultivation pond (1) through a support frame (5).
3. The low energy consumption and high efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 1, wherein the cultivation pond (1) is circular, and the bottom of the cultivation pond is funnel-shaped; the biological filter (2) is positioned at the center of the culture pond (1) to improve the space utilization rate of the culture pond (1).
4. The low energy consumption and high efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 3, wherein the biological filter (2) is cylindrical, and the bottom is in an inverted cone shape; the bottom inclination of the biological filter (2) is not less than that of the culture pond (1).
5. The low-energy-consumption high-efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 1, wherein the biofilter (2) comprises an outer cylindrical hollow cylinder and an inner cylindrical hollow cylinder which are coaxially arranged, and the diameter ratio of the outer cylindrical hollow cylinder to the inner cylindrical hollow cylinder is 2: 1-6: 1; the height of the outer cylindrical hollow cylinder is higher than the water surface height of the culture pond (1), and the height of the inner cylindrical hollow cylinder is lower than the water surface height of the culture pond (1); the bottom of the outer cylindrical hollow cylinder is designed into a filter screen (3), and the side wall of the inner cylindrical hollow cylinder and the bottom of the inner cylindrical hollow cylinder are sealed.
6. The low energy consumption and high efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 1, wherein the filler (6) is a hydrophilic suspended filler.
7. The low-energy-consumption high-efficiency in-situ air-lift type circulating water purification aquaculture system as claimed in claim 1, wherein the height ratio of the part of the air lift pipe (9) located under water to the part located above water is 3: 1-5: 1, and a tail end water outlet of the air lift water outlet pipe (10) is in an obliquely downward direction so as to facilitate water outlet to drive aquaculture water to form annular vortex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110870533.5A CN113519438A (en) | 2021-07-30 | 2021-07-30 | Low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system |
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| CN202110870533.5A CN113519438A (en) | 2021-07-30 | 2021-07-30 | Low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system |
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| CN113519438A true CN113519438A (en) | 2021-10-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114403062A (en) * | 2022-01-14 | 2022-04-29 | 中国水产科学研究院渔业机械仪器研究所 | Double-channel pollution discharge device of sea cucumber culture pond and working method thereof |
| CN114835351A (en) * | 2022-06-08 | 2022-08-02 | 浙江大学 | Ectopic air-lift type circulating water purification culture system applying electric flocculation technology |
| CN115088671A (en) * | 2022-07-11 | 2022-09-23 | 通威股份有限公司 | Pond internal circulation culture system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015190855A1 (en) * | 2014-06-12 | 2015-12-17 | 국립수산과학원 | Complex water treatment system for aquaculture waste water including package type of bio-filter |
| CN207054517U (en) * | 2017-07-12 | 2018-03-02 | 中国水产科学研究院南海水产研究所 | A kind of aquatic products circulating water culture system based on biological flocculation and technology of biological membrane |
| CN207948624U (en) * | 2018-01-25 | 2018-10-12 | 中国水产科学研究院南海水产研究所 | A kind of circulating water culture system based on the processing of biological flocculation dystopy |
| CN110115241A (en) * | 2019-05-16 | 2019-08-13 | 宁波大学 | A kind of high density prawn three-dimensional culture device and method based on interior circulation |
| US20210022323A1 (en) * | 2019-07-26 | 2021-01-28 | Xiao Jun Zhang | Circulating water purification system for aquaculture breeding |
-
2021
- 2021-07-30 CN CN202110870533.5A patent/CN113519438A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015190855A1 (en) * | 2014-06-12 | 2015-12-17 | 국립수산과학원 | Complex water treatment system for aquaculture waste water including package type of bio-filter |
| CN207054517U (en) * | 2017-07-12 | 2018-03-02 | 中国水产科学研究院南海水产研究所 | A kind of aquatic products circulating water culture system based on biological flocculation and technology of biological membrane |
| CN207948624U (en) * | 2018-01-25 | 2018-10-12 | 中国水产科学研究院南海水产研究所 | A kind of circulating water culture system based on the processing of biological flocculation dystopy |
| CN110115241A (en) * | 2019-05-16 | 2019-08-13 | 宁波大学 | A kind of high density prawn three-dimensional culture device and method based on interior circulation |
| US20210022323A1 (en) * | 2019-07-26 | 2021-01-28 | Xiao Jun Zhang | Circulating water purification system for aquaculture breeding |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114403062A (en) * | 2022-01-14 | 2022-04-29 | 中国水产科学研究院渔业机械仪器研究所 | Double-channel pollution discharge device of sea cucumber culture pond and working method thereof |
| CN114403062B (en) * | 2022-01-14 | 2022-11-01 | 中国水产科学研究院渔业机械仪器研究所 | Double-channel sewage draining device of sea cucumber culture pond and working method of double-channel sewage draining device |
| CN114835351A (en) * | 2022-06-08 | 2022-08-02 | 浙江大学 | Ectopic air-lift type circulating water purification culture system applying electric flocculation technology |
| CN114835351B (en) * | 2022-06-08 | 2023-08-11 | 浙江大学 | Ectopic air-stripping type circulating water purifying and breeding method applying electric flocculation technology |
| CN115088671A (en) * | 2022-07-11 | 2022-09-23 | 通威股份有限公司 | Pond internal circulation culture system |
| CN115088671B (en) * | 2022-07-11 | 2023-11-07 | 通威股份有限公司 | Pond internal circulation culture system |
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Application publication date: 20211022 |