WO1990003109A1 - Device for tanks for the rearing of aquatic organisms - Google Patents

Device for tanks for the rearing of aquatic organisms Download PDF

Info

Publication number
WO1990003109A1
WO1990003109A1 PCT/NO1989/000099 NO8900099W WO9003109A1 WO 1990003109 A1 WO1990003109 A1 WO 1990003109A1 NO 8900099 W NO8900099 W NO 8900099W WO 9003109 A1 WO9003109 A1 WO 9003109A1
Authority
WO
WIPO (PCT)
Prior art keywords
accordance
tank
flow guide
beneath
diffuser
Prior art date
Application number
PCT/NO1989/000099
Other languages
French (fr)
Inventor
Trygve Lunde
Original Assignee
Sinvent As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sinvent As filed Critical Sinvent As
Publication of WO1990003109A1 publication Critical patent/WO1990003109A1/en

Links

Classifications

    • 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
    • A01K61/00—Culture of aquatic animals
    • A01K61/10—Culture of aquatic animals of 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
    • 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
    • A01K61/00—Culture of aquatic animals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish

Definitions

  • the invention relates to basins for the rearing of aquatic organisms, as indicated in the introduction to Claim of Patent 1.
  • the invention is specially designed to create water flow in basins/tanks with restricted water depth in relation to the width of the basin (D/W ⁇ 1).
  • the basin can be used as a sedimentation basin for water treatment/cleansing and for the rearing of aquatic organisms, particularly fish (flatfish that require shallow water are ideal).
  • Water flow created by air diffusers to separate particles are known, from the cleansing of waste water (aerated sand traps).
  • the water and particles in suspension flow into one short side of the basin.
  • the particles are sedimented and are deposited on the bottom, while the water is removed by overflow drains at the other short side.
  • the deposited particles on the bottom are then led to a sludge pocket by a mechanical traverser or chain scraper.
  • the main purpose of the invention is to establish stable flow conditions in a basin/tank with shallow water in relation to its width (D/W ⁇ 1). This can be done by a device as stated in the characterizing part of Claim of Patent 1.
  • the flow along the bottom is stable and adequate enough to transport particles without requiring mechanical scrapers or suction equipment.
  • the most efficient means to get water to flow in a wide shallow basin using air diffusers is a flow guide. The particles are collected in concentrated form in a particle trap and are removed from the basin by emptying the particle trap.
  • the arrangement for generating flow and the particle trap are integrated in a single unit.
  • the geometric design of this provides optimal operating conditions for flow generation and particle sedimentation.
  • the invention makes it possible to create flow in rectangular, shallow basins/tanks. It incorporates bottom self cleaning at the same time as the particle contamination is removed as concentrated effluence prior to subsequent treatment, if necessary.
  • the air stream from the diffusers also enables oxygen.to be supplied and provides water aeration.
  • Fig. 1 shows the general flow situation in a basin/tank with the arrangement for flow generation.
  • Fig. 2 shows the arrangement for flow generation and the particle trap in detail
  • Fig. 3 presents a horizontal section through the basin/tank showing the flow generator arrangement and the particle trap.
  • Part of a rearing unit is shown which consists of a rectangular, box-shaped tank or container 10, which ha& considerably greater length (height direction in Fig. 3) than width (lateral direction in Fig. 1), and considerably greater width than depth.
  • This tank 10 is designed for circulation in the lateral direction as illustrated by arrows 11 in the water volume 12 in Fig. 1.
  • a vertical wall 14 is positioned by suitable means along one of the longitudinal walls 13 in the tank 10, so as to form a continuous opening 15 along the wall 13.
  • a longitudinal outlet area 16 from a tubular air diffuser 17.
  • the outlet area 16 can be in porous plastic or bar_shaped ceramic material.
  • the diffuser 17 in the example is fitted under the sheeting material 18 which forms part of the double bottom of the tank 10 and which is connected to the bottom of the tank at an inclined angle 19.
  • An alternative design is to freely locate the diffuser 17 above the double bottom 18 or integrate the diffuser 17 into the base of the tank 10. Whatever solution is adopted, the airstream out of the outlet area 16 will cause the water to flow up through the opening 15 thus creating water circulation in the tank.
  • this wing 20 On the upper edge of the vertical wall 14 there is a laterally protruding wing 20 that faces away from the adjoining wall of the tank. In the design advocated here this wing 20 is abo ⁇ t 6 cm under the undisturbed surface of the water in the tank. This design provides the most satisfactory water circulation.
  • the drain 23 is formed by a pipe with longitudinal upward_facing opening 24. This is connected by several lateral outlet pipes 25 to an outlet pipe 26. The purpose of the drain 23 is to form a particle trap to collect concentrated effluence from the tank 10. This particle matter can be emptied or removed from the outlet pipe 26 by suction for appropriate treatment.
  • An air supply pipe 27 is located longitudinally in the diffuser 17.
  • the supply pipe 27 is connected to an external source of air, such as a compressor, and has a number of holes 28 underneath.
  • the air supply pipe thus acts as an air diffuser in the diffuser 17 and ensures that the diffuser 17 is free of water when the unit starts up.
  • the flow and circulation system which has been described provides stable bottom flow towards the drain 23, which is sufficient to transport particles along the bottom into the drain or particle trap 23.
  • the flow into the inlet opening 22 creates water rotation along the longitudinal axis of the drain 23. This rotation means that the particles are easily transported along the drain 23 to the nearest outlet 25.
  • the drain 23 can also be located in the bottom of the tank 10. If an inclined angle 19 and double bottom 18 are used, external elements are avoided which could complicate both transport and assembly.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Zoology (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Farming Of Fish And Shellfish (AREA)

Abstract

The use of an air diffuser (17) in conjunction with flow guides (14) to create water flow in a basin/tank with shallow water in relation to the width of the tank, to transport solid particles towards a particle trap (23).

Description

Device for tanks for the rearing of aquatic organisms.
The invention relates to basins for the rearing of aquatic organisms, as indicated in the introduction to Claim of Patent 1. The invention is specially designed to create water flow in basins/tanks with restricted water depth in relation to the width of the basin (D/W<<1).
The basin can be used as a sedimentation basin for water treatment/cleansing and for the rearing of aquatic organisms, particularly fish (flatfish that require shallow water are ideal).
Water flow created by air diffusers to separate particles are known, from the cleansing of waste water (aerated sand traps). The separation of particles is done at present in rectangular basins with shallow water in relation to the width of the basin D/W = 0.5 - 0.2). The water and particles in suspension flow into one short side of the basin. Then the particles are sedimented and are deposited on the bottom, while the water is removed by overflow drains at the other short side. The deposited particles on the bottom are then led to a sludge pocket by a mechanical traverser or chain scraper.
When flow is created by means of air in a sand trap, thebasin is designed for a water depth which equates its width (D/W 1). The flow conditions in a sedimentation basin do not result in the efficient transport of the deposited particles and are consequently dependent on mechanical scrapers or suction equipment. The main purpose of the invention is to establish stable flow conditions in a basin/tank with shallow water in relation to its width (D/W << 1). This can be done by a device as stated in the characterizing part of Claim of Patent 1. The flow along the bottom is stable and adequate enough to transport particles without requiring mechanical scrapers or suction equipment. The most efficient means to get water to flow in a wide shallow basin using air diffusers is a flow guide. The particles are collected in concentrated form in a particle trap and are removed from the basin by emptying the particle trap.
The arrangement for generating flow and the particle trap are integrated in a single unit. The geometric design of this provides optimal operating conditions for flow generation and particle sedimentation. The invention makes it possible to create flow in rectangular, shallow basins/tanks. It incorporates bottom self cleaning at the same time as the particle contamination is removed as concentrated effluence prior to subsequent treatment, if necessary. The air stream from the diffusers also enables oxygen.to be supplied and provides water aeration.
Example:
An example of the invention is shown on the sketches, where
Fig. 1 shows the general flow situation in a basin/tank with the arrangement for flow generation.
Fig. 2 shows the arrangement for flow generation and the particle trap in detail and Fig. 3 presents a horizontal section through the basin/tank showing the flow generator arrangement and the particle trap. Part of a rearing unit is shown which consists of a rectangular, box-shaped tank or container 10, which ha& considerably greater length (height direction in Fig. 3) than width (lateral direction in Fig. 1), and considerably greater width than depth. This tank 10 is designed for circulation in the lateral direction as illustrated by arrows 11 in the water volume 12 in Fig. 1.
A vertical wall 14 is positioned by suitable means along one of the longitudinal walls 13 in the tank 10, so as to form a continuous opening 15 along the wall 13. At the bottom of this opening 15 there is a longitudinal outlet area 16 from a tubular air diffuser 17. The outlet area 16 can be in porous plastic or bar_shaped ceramic material. The diffuser 17 in the example is fitted under the sheeting material 18 which forms part of the double bottom of the tank 10 and which is connected to the bottom of the tank at an inclined angle 19.
An alternative design is to freely locate the diffuser 17 above the double bottom 18 or integrate the diffuser 17 into the base of the tank 10. Whatever solution is adopted, the airstream out of the outlet area 16 will cause the water to flow up through the opening 15 thus creating water circulation in the tank.
On the upper edge of the vertical wall 14 there is a laterally protruding wing 20 that faces away from the adjoining wall of the tank. In the design advocated here this wing 20 is aboμt 6 cm under the undisturbed surface of the water in the tank. This design provides the most satisfactory water circulation.
At the lower edge of the wall 14 protruding in the same direction as the wing 20, there is a second wing 21 which is next to an inlet opening 22 in front of the diffuser 17, upstream of it when the direction of circulation is considered. At the lower edge of the inlet opening 22, there is a longitudinal groove or drain 23 in the double bottom 18. The drain 23 is formed by a pipe with longitudinal upward_facing opening 24. This is connected by several lateral outlet pipes 25 to an outlet pipe 26. The purpose of the drain 23 is to form a particle trap to collect concentrated effluence from the tank 10. This particle matter can be emptied or removed from the outlet pipe 26 by suction for appropriate treatment.
An air supply pipe 27 is located longitudinally in the diffuser 17. The supply pipe 27 is connected to an external source of air, such as a compressor, and has a number of holes 28 underneath. The air supply pipe thus acts as an air diffuser in the diffuser 17 and ensures that the diffuser 17 is free of water when the unit starts up. The flow and circulation system which has been described provides stable bottom flow towards the drain 23, which is sufficient to transport particles along the bottom into the drain or particle trap 23. The flow into the inlet opening 22 creates water rotation along the longitudinal axis of the drain 23. This rotation means that the particles are easily transported along the drain 23 to the nearest outlet 25.
The drain 23 can also be located in the bottom of the tank 10. If an inclined angle 19 and double bottom 18 are used, external elements are avoided which could complicate both transport and assembly.

Claims

Claim of Patent:
1. A device for tanks for the rearing of aquatic organisms, particularly fish and Crustacea, where there is a box_shaped container (10) at the bottom with integrated means (23) of collecting particles and other sedimented contamination and where there is a devised means of creating motion in the water volume, c h a r a c t e r i z e d by this consisting of a generally vertical flow guide (14) which adjoins an opening (15) in a longitudinal wall (13) in the tank, and where on the underneath of this opening there is a longitudinal air diffuser (17), and where in the area in the immediate vicinity of the air' diffuser (17) there is a catchment drain (23) beneath the opening (15), where the drain is designed for the removal of particles.
2. A device in accordance with Claim 1, c h a r a c t e r i z e d by the air diffuser (17) and the catchment drain (23) being integrated under the double bottom (18) which is placed beneath the flow guide (14).
3. A device in accordance with Claims 1 or 2, c h a r a c t e r i z e d by the air diffuser (17) forming a longitudinal pipe with perforations (16) along the upper surface.
4. A device in accordance with Claim 3, c h a r a c t e r i z e d by the air diffuser (17) containing an internal longitudinal air supply pipe (28), which has outlet openings facing downward.
5. A device in accordance with Claim 4, c h a r a c t e r i z e d by a wing (20) at the upper edge of the flow guide (14) just beneath the surface of the water volume (12), which protrudes laterally away from the adjoining longitudinal wall (13) in the tank.
6. A device in accordance with Claim 5, c h a r a c t e r i z e d by the wing lying about 6 cm beneath the surface of the water volume.
7. A device in accordance with one of Claims 1-6, c h a r a c t e r i z e d by a wing (21) at the lower edge of the flow guide (14) protruding away from the adjoining longitudinal wall (13).
PCT/NO1989/000099 1988-09-22 1989-09-22 Device for tanks for the rearing of aquatic organisms WO1990003109A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO88884198A NO884198L (en) 1988-09-22 1988-09-22 AIR DIFFUSER FOR WATER POWER SETTING IN THE POOL.
NO884198 1988-09-22

Publications (1)

Publication Number Publication Date
WO1990003109A1 true WO1990003109A1 (en) 1990-04-05

Family

ID=19891258

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1989/000099 WO1990003109A1 (en) 1988-09-22 1989-09-22 Device for tanks for the rearing of aquatic organisms

Country Status (2)

Country Link
NO (1) NO884198L (en)
WO (1) WO1990003109A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557630A1 (en) * 1992-02-20 1993-09-01 Kaiyo Kogyo Kabushiki Kaisha Total water circulating system for shallow water areas
EP1473986A2 (en) * 2002-02-15 2004-11-10 Israel Haddas Mega flow system
CN102578021A (en) * 2012-02-20 2012-07-18 宜兴市文峰环境科技有限公司 Rotational flow oxygenation pond for culture pond
CZ306979B6 (en) * 2016-09-01 2017-10-25 Jihočeská Univerzita V Českých Budějovicích, Fakulta Rybářství A Ochrany Vod A device for industrial aquaculture
WO2019172776A1 (en) * 2018-03-06 2019-09-12 Searas As Aquaculture cage comprising a main chamber and a peripheral ring chamber

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106508775A (en) * 2016-11-05 2017-03-22 北海益生源农贸有限责任公司 Container for aquatic product seeding transportation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2131229A5 (en) * 1971-10-11 1972-11-10 Foessel Florent
GB1567171A (en) * 1976-03-05 1980-05-14 Fisons Ltd Method for rearing fish

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2131229A5 (en) * 1971-10-11 1972-11-10 Foessel Florent
GB1567171A (en) * 1976-03-05 1980-05-14 Fisons Ltd Method for rearing fish

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557630A1 (en) * 1992-02-20 1993-09-01 Kaiyo Kogyo Kabushiki Kaisha Total water circulating system for shallow water areas
EP1473986A2 (en) * 2002-02-15 2004-11-10 Israel Haddas Mega flow system
EP1473986A4 (en) * 2002-02-15 2008-03-12 Israel Haddas Mega flow system
CN102578021A (en) * 2012-02-20 2012-07-18 宜兴市文峰环境科技有限公司 Rotational flow oxygenation pond for culture pond
CZ306979B6 (en) * 2016-09-01 2017-10-25 Jihočeská Univerzita V Českých Budějovicích, Fakulta Rybářství A Ochrany Vod A device for industrial aquaculture
WO2019172776A1 (en) * 2018-03-06 2019-09-12 Searas As Aquaculture cage comprising a main chamber and a peripheral ring chamber
US11684046B2 (en) 2018-03-06 2023-06-27 Searas As Aquaculture cage comprising a main chamber and a peripheral ring chamber

Also Published As

Publication number Publication date
NO884198D0 (en) 1988-09-22
NO884198L (en) 1990-03-23

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