WO2011136660A1 - Farming system for aquatic organisms - Google Patents
Farming system for aquatic organisms Download PDFInfo
- Publication number
- WO2011136660A1 WO2011136660A1 PCT/NO2011/000141 NO2011000141W WO2011136660A1 WO 2011136660 A1 WO2011136660 A1 WO 2011136660A1 NO 2011000141 W NO2011000141 W NO 2011000141W WO 2011136660 A1 WO2011136660 A1 WO 2011136660A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- outlet
- arrangement according
- production vessel
- primary production
- Prior art date
Links
- 238000009313 farming Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 110
- 238000004519 manufacturing process Methods 0.000 claims abstract description 73
- 238000004891 communication Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 23
- 238000004140 cleaning Methods 0.000 claims description 12
- 239000013049 sediment Substances 0.000 claims description 9
- 238000013022 venting Methods 0.000 claims description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 235000021049 nutrient content Nutrition 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 2
- 230000001706 oxygenating effect Effects 0.000 claims 1
- 235000015097 nutrients Nutrition 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 241000972773 Aulopiformes Species 0.000 description 3
- 238000006213 oxygenation reaction Methods 0.000 description 3
- 235000019515 salmon Nutrition 0.000 description 3
- 241000894007 species Species 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 210000003608 fece Anatomy 0.000 description 2
- 235000019688 fish Nutrition 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241001474374 Blennius Species 0.000 description 1
- 241000257465 Echinoidea Species 0.000 description 1
- 241000237536 Mytilus edulis Species 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 235000020638 mussel Nutrition 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- A01K63/00—Receptacles for live fish, e.g. 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
- A01K61/00—Culture of aquatic animals
- A01K61/90—Sorting, grading, counting or marking live aquatic animals, e.g. sex determination
- A01K61/95—Sorting, grading, counting or marking live aquatic animals, e.g. sex determination specially adapted for 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
Definitions
- a land-based farming system for aquatic organisms wherein a cylindrical primary production vessel provided with a first outlet for water and arranged at a distance from a side wall is in fluid communication with a water treatment plant, more particularly in that the water treatment plant is arranged in a first annulus wholly or partly encircling the primary production vessel .
- Farming of aquatic organisms in vessels onshore sets up a series of requirements for treatment of water.
- the water treatment process consists of particle separation, C0 2 venting, biological cleaning, alkalisation, oxygenation and UV or ozone treatment.
- pumps for moving water between farming vessels and water treatment processes and also miscellaneous equipment for monitoring and process control .
- Farming vessels are configured and dimensioned for particle separation where larger particles being deposited at the vessel bottom are preferably transported quickly by a bottom current into the centre of the vessel and caught up in a particle outlet. With a correct relationship between the vessel depth and radius and good configuration of a particle trap/outlet, around 70% of the particles brought into the water as feed particle and faeces may be separated and transported out of the system with a small share of the mass of water.
- the recirculation systems currently developed and supplied may be split into 2 groups/types:
- a first example is a system where a bio-filter having
- Ventilation and mechanical particle separation is located beside every farming vessel, known as the BioFish system developed by SINTEF, Trondheim, Norway.
- the bio-filter with particle separation and venting is located in the centre of the farming basin. This type is developed and being sold by EcoFarm AS, Bergen, Norway.
- the object of the invention is to remedy or reduce at least one of the disadvantages of the prior art, or at least to provide a useful alternative to the prior art.
- a system for farming of principally any biological species suited for farming in circular farming vessels comprising at least two vessels in a system.
- a first, central vessel forms a farming volume for primary production, and an annulus formed outside of the first vessel is used for water treatment.
- Further annuli are used for secondary production at least partly based on waste products from the primary production. This secondary production thus contributes to the water cleaning.
- the secondary culture is then located in the second annulus encircling the first annulus, as each of the annuli has a dimension adapted to the space needed for technical equipment and the volume needed for the secondary culture .
- the central vessel (the primary production vessel) is used for farming of the primary species (for example salmon) .
- the water treatment may comprise C0 2 venting, particle removal, biologic filtering and cleaning, and oxygenation. Also other water treatment may be carried out when needed and when the system is equipped for it.
- the lower portion of the first annulus forms a water volume preferably provided with bio- cleaning elements of a per se known sort .
- the balance of the circulated water volume roughly 10-20% carries with it sedimentary particles from particle outlets arranged in the bottom portion of the primary production vessel, possibly from sediment traps connected with the water outlet, for example connected to a first outlet.
- the particle discharge water is taken to the secondary production annulus where the nutrients from the primary production are utilised for production of one or more secondary species contributing to cleaning of the water such that it may be recirculated back to the primary production. If needed, the particle discharge water may undergo cleaning by means of the water treatment equipment as described above before or after it has been in contact with the secondary production culture.
- the first outlet may be combined with one or more other outlets arranged in the sidewall. Thereby, at large flow through rates most of the water can be taken out through the other outlets to thereby dampen the flow rate and the whirl formation at the first outlet.
- connected to the first outlet may thereby be reduced without the system becoming unsuitable for production having need of a high replacement speed.
- the water inflow is preferably spread among several inlets arranged as spreader pipes provided with several inlet openings distributed over a large part of the vessel water depth and with the spreader pipes distributed in the vessel water volume .
- the water level in the primary production vessel is higher than in the surrounding annulus, preferably 40-70% higher. For practical purposes this means that for primary production of salmon the water depth in the central vessel may be approx. 5 metres, while the water level in the surrounding secondary production vessel is between 3 and 3.5 metres .
- the level difference may be utilised for airing of the water.
- this wall may be built for a smaller dimensioning water pressure, the resulting water pressure being reduced to the difference between the water level heights in the primary production vessel and the first annulus.
- a water filled second annulus give a lower resulting water pressure on the outside wall of the first annulus.
- the secondary production may typically be sea urchins, mussels and various types of seaweed having a high market value.
- the nutrients in the waste may be utilised for secondary production of various types of plants/vegetables.
- the secondary production annulus may then also function as a greenhouse .
- grading gates dividing the primary production vessel into sectors. Fish may thereby be graded without having to be moved to an external grading plant .
- Fastening means for grading gates may be attached to the sidewall of the primary production vessel and to the central pipe.
- the invention relates more particularly to an arrangement for a land-based farming plant for aquatic organisms, where a cylindrical primary production vessel provided with a first outlet for water is in fluid
- the primary production vessel may be provided with several closable second outlets arranged in the sidewall and in fluid communication with the water treatment plant. Thereby the flow speed around and through the first outlet may be held at a level providing favourable depositing conditions for particles drifting in the water flowing through the first outlet .
- the first outlet may be arranged as a tubular body projecting upwards from a bottom section and over the water surface and provided with several inlet openings essentially arranged in a lower portion of the tubular body. Alternatively the inlet openings may be distributed over an essential portion of the tubular body vertical extent. The water flow into the first outlet may thus be controlled to promote sedimentation, collection of dead fish etc.
- the first outlet may be provided with a central outlet pipe forming a discharge arranged at a vertical distance from a bottom section in the first outlet.
- the first outlet thus forms a sedimentation basin.
- the bottom section may be provided with a sediment trap drainable through several particle outlets. Feed particles, faeces and other waste sedimenting in the first outlet may thereby be removed continuously or in sequences .
- the first annulus may form a secondary production vessel comprising organisms arranged to be able to reduce the nutrient content in sediment enriched outlet water from the primary production vessel.
- a water surface in the primary production vessel may in a normal condition be 40-70% higher than a water surface in a secondary production vessel.
- the primary vessel wall may thereby be dimensioned for a smaller load when the water volume in the secondary production vessel is in direct contact with the primary vessel wall .
- the water treatment plant may comprise means picked from the group consisting of devices for C0 2 venting, particle removal, biological filtering and cleaning, oxygenation, alkalisation, UV radiation and ozone treatment.
- the water treatment may be adapted to the needs present at any time .
- the water treatment plant may be arranged under walkways encircling an upper portion of the primary production vessel. An improved utilisation of the area occupied by the farming plant is thus achieved.
- the primary production vessel may be provided with means arranged for fastening of grading gates extending between a sidewall and a central pipe over the total depth of the primary production vessel. Grading may thus take place in the production vessel without the need for moving of the aquatic organisms to en external grading plant.
- Fig. 1 shows in perspective a system according to the
- a centrally arranged primary production vessel is encircled by an annular room containing water treatment equipment and forming a walkway around the primary production vessel;
- Fig. 2 shows in perspective and partly sectioned a system provided with a roof and where a secondary production volume is arranged in the same annulus as the water treatment equipment;
- FIG. 3 shows in perspective and partly sectioned the main structures of a system comprising two concentric annuli ;
- Fig. 4 shows in perspective the water treatment system, the surrounding wall structures being removed for clarity;
- Fig. 5 shows to a larger scale and in part and partly
- Fig. 6 shows in greater detail a first outlet provided
- the reference numeral 1 indicates a centrally located, circular primary production vessel defined by a sidewall 11 arranged on a central vessel bottom 12.
- the primary production vessel 1 is provided with an outlet 13 arranged centrally, as a central pipe 131 projects vertically upward from a bottom section 133 (see particularly fig. 6) integrated in the vessel bottom 12 , and to above the level of a primary water surface 161 in a production volume 16 formed by the primary production vessel 1.
- a central discharge pipe 136 With an open outlet portion 136a in the central discharge pipe 136 upper end projects upwardly toward the upper portion of the central pipe 131.
- the central pipe 131 is in fluid communication with a distribution chamber 137 arranged under a sediment trap 134 defined by the central pipe 131, the bottom section 133 and the central discharge pipe 136.
- sidewall 11 is arranged several closable second outlets 14 provided with a closing device 141.
- the drain openings 132 and the second outlets 14 are provided with means (not shown) arranged to prevent aquatic organisms being farmed to be carried out of the primary production vessel 1 with the discharge water.
- the spreader pipes 15 are connected to the water treatment plant 23.
- the water treatment plant 23 In an upper portion of a first annulus 2 encircling the primary production vessel 1 and defined by a first annulus wall 21 and a first annulus bottom 22, is arranged the water treatment plant 23.
- the water treatment plant 23 comprises several sections, each section being provided with several modules for airing, particle removal etc., exemplified here by a bio- filter module 231 receiving the water from the outlets 13, 14, a particle removal module 232 treating the discharge from the sediment trap 134 and subsequently
- the treated water is pumped back to the primary production vessel 1 through the respective spreader pipes 15.
- the transport of water takes place partly by free flow, and partly by means of pumps 24.
- a lower portion of the first annulus 2 forms a basin for the water treatment plant 23.
- the water depth is typically 3 metres for a plant having a water depth of 5 metres in the primary production vessel 1.
- the water volume in the first annulus forms a secondary water surface 27.
- a walkway 4 which also extends in over the primary water surface 161 to the top of the central pipe 131.
- a roof 6 covers the farming unit .
- FIG. 3 In yet another embodiment shown in figure 3 is a second annulus 3 arranged encircling the first annulus 2 and being defined by a second annulus wall 31 and a second annulus bottom 32.
- the height of the second annulus wall 31 is adapted to the water depth in the first annulus 2 as the water in the first annulus 2 is in direct communication with the water volume in the second annulus 3.
- the water volume in the second annulus 3 is utilised for a secondary production of one or more organisms utilising remaining nutrients in the discharge water from the primary production vessel 1.
- the water to the second annulus 3 is supplied from the first annulus 2 via lines provided with spreader nozzles and closable valves, as the second annulus 3 is formed as a greenhouse for plants getting water supplied as irrigation, underground irrigation or the like, and unused water is collected via a drainage system (not shown) and returned to the primary production vessel 1.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Zoology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
An arrangement for a land-based farming plant for aquatic organisms, wherein a cylindrical primary production vessel (1) provided with a first outlet (13) for water and arranged at a distance from a sidewall (11) is in fluid communication with a water treatment plant (23), and wherein the water treatment plant (23) is arranged in a first annulus (2) wholly or in part encircling the primary production vessel (1).
Description
FARMING SYSTEM FOR AQUATIC ORGANISMS
A land-based farming system for aquatic organisms, wherein a cylindrical primary production vessel provided with a first outlet for water and arranged at a distance from a side wall is in fluid communication with a water treatment plant, more particularly in that the water treatment plant is arranged in a first annulus wholly or partly encircling the primary production vessel .
A lack of suitable locations in natural water basins in fjords, lakes etc. and also problems regarding waste
handling, control regarding spreading of diseases, parasite attacks and escaping particularly within salmon farming, from such farms has resulted in an increasing interest in being able to implement farming in land-based plants .
Farming of aquatic organisms in vessels onshore sets up a series of requirements for treatment of water. Principally the water treatment process consists of particle separation, C02 venting, biological cleaning, alkalisation, oxygenation and UV or ozone treatment. In addition to these processes are needed pumps for moving water between farming vessels and water treatment processes and also miscellaneous equipment for monitoring and process control .
Farming vessels are configured and dimensioned for particle separation where larger particles being deposited at the
vessel bottom are preferably transported quickly by a bottom current into the centre of the vessel and caught up in a particle outlet. With a correct relationship between the vessel depth and radius and good configuration of a particle trap/outlet, around 70% of the particles brought into the water as feed particle and faeces may be separated and transported out of the system with a small share of the mass of water.
The recirculation systems currently developed and supplied may be split into 2 groups/types:
1. Water treatment systems on a section or plant level. A central and externally located cleaning system common for several farming vessels.
2. Water treatment systems on a vessel level . A cleaning system for each farming unit .
In addition there exist some systems being combinations of these two main groups, where some of the cleaning processes are on a vessel level and some are common for several vessels (one section or the whole plant) . For the first type mostly in current use, the recirculating water must be transported via a piping network to and from the various water treatment systems and back to the farming vessel . As the volumes of water to be recirculated are often large, the cost of this piping network becomes high and makes up a large part of the investment costs for this type of recirculating plant. By the very fact that large volumes of water are moved over large distances, the operation costs also become high for land- based plants of this type.
For the second type of water treatment systems at vessel level there is developed and for sale various systems. A first example is a system where a bio-filter having
ventilation and mechanical particle separation is located
beside every farming vessel, known as the BioFish system developed by SINTEF, Trondheim, Norway. In a second example the bio-filter with particle separation and venting is located in the centre of the farming basin. This type is developed and being sold by EcoFarm AS, Bergen, Norway.
The object of the invention is to remedy or reduce at least one of the disadvantages of the prior art, or at least to provide a useful alternative to the prior art.
The object is achieved by the features disclosed in the below description and in the subsequent claims .
There is provided a system for farming of principally any biological species suited for farming in circular farming vessels. The basic idea and the distinction of the system are to use concentric vessels in vessels comprising at least two vessels in a system. A first, central vessel forms a farming volume for primary production, and an annulus formed outside of the first vessel is used for water treatment. Further annuli are used for secondary production at least partly based on waste products from the primary production. This secondary production thus contributes to the water cleaning. The secondary culture is then located in the second annulus encircling the first annulus, as each of the annuli has a dimension adapted to the space needed for technical equipment and the volume needed for the secondary culture .
The central vessel (the primary production vessel) is used for farming of the primary species (for example salmon) .
Roughly 80-90% of the water volume being circulated passes through the water treatment equipment and is cleaned here before being taken back to the primary production vessel. The water treatment may comprise C02 venting, particle removal, biologic filtering and cleaning, and oxygenation. Also other
water treatment may be carried out when needed and when the system is equipped for it. The lower portion of the first annulus forms a water volume preferably provided with bio- cleaning elements of a per se known sort .
The balance of the circulated water volume, roughly 10-20% carries with it sedimentary particles from particle outlets arranged in the bottom portion of the primary production vessel, possibly from sediment traps connected with the water outlet, for example connected to a first outlet. The particle discharge water is taken to the secondary production annulus where the nutrients from the primary production are utilised for production of one or more secondary species contributing to cleaning of the water such that it may be recirculated back to the primary production. If needed, the particle discharge water may undergo cleaning by means of the water treatment equipment as described above before or after it has been in contact with the secondary production culture.
The first outlet may be combined with one or more other outlets arranged in the sidewall. Thereby, at large flow through rates most of the water can be taken out through the other outlets to thereby dampen the flow rate and the whirl formation at the first outlet. The sizes of conduits
connected to the first outlet may thereby be reduced without the system becoming unsuitable for production having need of a high replacement speed.
In the same manner the water inflow is preferably spread among several inlets arranged as spreader pipes provided with several inlet openings distributed over a large part of the vessel water depth and with the spreader pipes distributed in the vessel water volume .
The water level in the primary production vessel is higher than in the surrounding annulus, preferably 40-70% higher. For practical purposes this means that for primary production of salmon the water depth in the central vessel may be approx. 5 metres, while the water level in the surrounding secondary production vessel is between 3 and 3.5 metres . The level difference may be utilised for airing of the water.
By letting the water volume in the first annulus be in direct contact with the sidewall of the primary production vessel, this wall may be built for a smaller dimensioning water pressure, the resulting water pressure being reduced to the difference between the water level heights in the primary production vessel and the first annulus. In the same way a water filled second annulus give a lower resulting water pressure on the outside wall of the first annulus.
By using seawater in the primary production the secondary production may typically be sea urchins, mussels and various types of seaweed having a high market value. By using
freshwater the nutrients in the waste may be utilised for secondary production of various types of plants/vegetables. The secondary production annulus may then also function as a greenhouse .
In combination of a primary and a secondary production approximately 100% of the water quantity may be recirculated. There will mainly be a need only for replacing the quantity of water evaporating from the system. This will give a considerable reduction in energy consumption and cost and also investment costs tied to water supply and any heating of the water. In addition the short transfer of water will contribute to reduce the energy consumption and the need for technical auxiliaries is reduced.
By utilising the nutrients from the primary production for one or more secondary productions, it is avoided that the nutrients contribute to pollution or an added cost for the farmer. Secondary production will also contribute to an added income. The system according to the invention may be operated with minimal emissions. The system will also provide high safety with regards to spreading of infections, all water treatment being tied to the individual farming unit, and leading used, treated water between the various farming units is avoided.
At the central pipe and the sidewall of the primary
production vessel there may be located grading gates dividing the primary production vessel into sectors. Fish may thereby be graded without having to be moved to an external grading plant . Fastening means for grading gates may be attached to the sidewall of the primary production vessel and to the central pipe.
In a first aspect the invention relates more particularly to an arrangement for a land-based farming plant for aquatic organisms, where a cylindrical primary production vessel provided with a first outlet for water is in fluid
communication with a water treatment plant, characterised in that the water treatment plant is arranged in a first annulus encircling the primary production vessel.
The primary production vessel may be provided with several closable second outlets arranged in the sidewall and in fluid communication with the water treatment plant. Thereby the flow speed around and through the first outlet may be held at a level providing favourable depositing conditions for particles drifting in the water flowing through the first outlet .
The first outlet may be arranged as a tubular body projecting upwards from a bottom section and over the water surface and provided with several inlet openings essentially arranged in a lower portion of the tubular body. Alternatively the inlet openings may be distributed over an essential portion of the tubular body vertical extent. The water flow into the first outlet may thus be controlled to promote sedimentation, collection of dead fish etc.
The first outlet may be provided with a central outlet pipe forming a discharge arranged at a vertical distance from a bottom section in the first outlet. The first outlet thus forms a sedimentation basin.
The bottom section may be provided with a sediment trap drainable through several particle outlets. Feed particles, faeces and other waste sedimenting in the first outlet may thereby be removed continuously or in sequences .
The first annulus may form a secondary production vessel comprising organisms arranged to be able to reduce the nutrient content in sediment enriched outlet water from the primary production vessel. Thus means contributing to
cleaning of the water in the primary production vessel is provided, the nutrient content in the waste being utilised in the production of other biologic material .
A water surface in the primary production vessel may in a normal condition be 40-70% higher than a water surface in a secondary production vessel. The primary vessel wall may thereby be dimensioned for a smaller load when the water volume in the secondary production vessel is in direct contact with the primary vessel wall .
The water treatment plant may comprise means picked from the group consisting of devices for C02 venting, particle
removal, biological filtering and cleaning, oxygenation, alkalisation, UV radiation and ozone treatment. Thus the water treatment may be adapted to the needs present at any time .
The water treatment plant may be arranged under walkways encircling an upper portion of the primary production vessel. An improved utilisation of the area occupied by the farming plant is thus achieved.
The primary production vessel may be provided with means arranged for fastening of grading gates extending between a sidewall and a central pipe over the total depth of the primary production vessel. Grading may thus take place in the production vessel without the need for moving of the aquatic organisms to en external grading plant.
In the following is described an example of a preferred embodiment illustrated in the accompanying drawings, wherein:
Fig. 1 shows in perspective a system according to the
invention where a centrally arranged primary production vessel is encircled by an annular room containing water treatment equipment and forming a walkway around the primary production vessel;
Fig. 2 shows in perspective and partly sectioned a system provided with a roof and where a secondary production volume is arranged in the same annulus as the water treatment equipment;
Fig. 3 shows in perspective and partly sectioned the main structures of a system comprising two concentric annuli ;
Fig. 4 shows in perspective the water treatment system, the surrounding wall structures being removed for clarity;
Fig. 5 shows to a larger scale and in part and partly
sectioned how the water treatment equipment is integrated in the annulus enclosing the primary production vessel ; and
Fig. 6 shows in greater detail a first outlet provided
with a mud trap, where a central pipe is removed for clarity.
In the figures the reference numeral 1 indicates a centrally located, circular primary production vessel defined by a sidewall 11 arranged on a central vessel bottom 12. The primary production vessel 1 is provided with an outlet 13 arranged centrally, as a central pipe 131 projects vertically upward from a bottom section 133 (see particularly fig. 6) integrated in the vessel bottom 12 , and to above the level of a primary water surface 161 in a production volume 16 formed by the primary production vessel 1. From the bottom section 133 abutting sealingly against the central pipe 131, a central discharge pipe 136 with an open outlet portion 136a in the central discharge pipe 136 upper end projects upwardly toward the upper portion of the central pipe 131. Through the central discharge pipe 136 the central pipe 131 is in fluid communication with a distribution chamber 137 arranged under a sediment trap 134 defined by the central pipe 131, the bottom section 133 and the central discharge pipe 136.
Immediately above the sediment trap 134 in the central pipe 131 is arranged several drain openings 132 arranged to lead water out from the primary production vessel 1. From the sediment trap 134 several particle outlets 134 extend to a first portion of the water treatment plant 23. From the
distribution chamber 137 several outlet pipes 138 extend to a second portion of the water treatment plant 23.
In the primary production vessel 1 sidewall 11 is arranged several closable second outlets 14 provided with a closing device 141.
The drain openings 132 and the second outlets 14 are provided with means (not shown) arranged to prevent aquatic organisms being farmed to be carried out of the primary production vessel 1 with the discharge water.
Several vertical spreader pipes 15 having a series of outlet openings 151 distributed in an essential part of the depth of the primary production volume 16, are arranged evenly
distributed at a distance from the sidewall 11. The spreader pipes 15 are connected to the water treatment plant 23.
In an upper portion of a first annulus 2 encircling the primary production vessel 1 and defined by a first annulus wall 21 and a first annulus bottom 22, is arranged the water treatment plant 23. The water treatment plant 23 comprises several sections, each section being provided with several modules for airing, particle removal etc., exemplified here by a bio- filter module 231 receiving the water from the outlets 13, 14, a particle removal module 232 treating the discharge from the sediment trap 134 and subsequently
treating all the discharge water by means of per se known means, for example foam stripper, and a further airing module 233 for finishing treatment of cleaned water.
The treated water is pumped back to the primary production vessel 1 through the respective spreader pipes 15.
The transport of water takes place partly by free flow, and partly by means of pumps 24.
A lower portion of the first annulus 2 forms a basin for the water treatment plant 23. Here the water depth is typically 3 metres for a plant having a water depth of 5 metres in the primary production vessel 1. The water volume in the first annulus forms a secondary water surface 27.
Above the first annulus 2 is arranged a walkway 4 which also extends in over the primary water surface 161 to the top of the central pipe 131.
In an embodiment shown in figure 2 a roof 6 covers the farming unit .
In yet another embodiment shown in figure 3 is a second annulus 3 arranged encircling the first annulus 2 and being defined by a second annulus wall 31 and a second annulus bottom 32. The height of the second annulus wall 31 is adapted to the water depth in the first annulus 2 as the water in the first annulus 2 is in direct communication with the water volume in the second annulus 3. The water volume in the second annulus 3 is utilised for a secondary production of one or more organisms utilising remaining nutrients in the discharge water from the primary production vessel 1.
In an alternative not shown embodiment the water to the second annulus 3 is supplied from the first annulus 2 via lines provided with spreader nozzles and closable valves, as the second annulus 3 is formed as a greenhouse for plants getting water supplied as irrigation, underground irrigation or the like, and unused water is collected via a drainage system (not shown) and returned to the primary production vessel 1.
Claims
A land-based farming arrangement for aquatic
organisms, wherein a cylindrical primary production vessel (1) provided with a first outlet (13) for water and arranged at a distance from a sidewall (11) is in fluid communication with a water treatment plant (23), c h a r a c t e r i s e d i n that the water
treatment plant (23) is arranged in a first annulus (2) wholly or in part encircling the primary
production vessel (1) .
An arrangement according to claim 1,
c h a r a c t e r i s e d i n that the primary production vessel (1) is provided with several
closable second outlets (14) arranged in the sidewall (11) and in fluid communication with the water
treatment plant (23) .
An arrangement according to claim 1,
c h a r a c t e r i s e d i n that the first outlet (13) is formed as a tubular body (131) projecting upwardly from a bottom section (133) and over a primary water surface (16) and being provided with several inlet openings (132) essentially arranged in a lower portion of the tubular body (131) .
An arrangement according to claim 1,
c h a r a c t e r i s e d i n that the first outlet (13) is formed as a tubular body (131) projecting upwardly from a bottom section (133) and over the water surface and is provided with several inlet openings (132) distributed over a considerable part of the vertical extent of the tubular body (131) .
5. An arrangement according to claim 1,
c h a r a c t e r i s e d i n that the first outlet (13) is provided with a central outlet pipe (136) forming an outlet (136a) arranged a vertical distance from a bottom section (133) in the first outlet (13) .
6. An arrangement according to claim 1,
c h a r a c t e r i s e d i n that a bottom section (133) is provided with a sediment trap (134) being drainable through several particle outlets (135) .
7. An arrangement according to claim 1,
c h a r a c t e r i s e d i n that a second annulus (3) forms a secondary production vessel holding organisms arranged to be able to reduce the nutrient content in a sediment enriched discharge water from the primary production vessel (1) .
8. An arrangement according to claim 1,
c h a r a c t e r i s e d i n that a water level (17) in the primary production vessel (1) in a normalcy is arranged 40-70% higher than a water level (27) in the first annulus (2) .
9. An arrangement according to claim 1,
c h a r a c t e r i s e d i n that the water
treatment plant (23) comprises means picked from the group consisting of devices for C02 venting, particle removal, biologic filtration and cleaning,
oxygenating, alkalising, UV radiation and ozone treatment .
10. An arrangement according to claim 1,
c h a r a c t e r i s e d i n that the water
treatment plant (23) is arranged below walkways
encircling an upper portion of the primary producti vessel (1) .
An arrangement according to claim 1,
c h a ra c t e r i s e d i n that the primary production vessel (1) is provided with means for attachment of grading gates extending between a sidewall (11) and a central pipe (131) in the total depth of the primary production vessel (1) .
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20100627A NO20100627A1 (en) | 2010-04-30 | 2010-04-30 | Aquaculture system for aquatic organisms |
NO20100627 | 2010-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011136660A1 true WO2011136660A1 (en) | 2011-11-03 |
Family
ID=44210111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2011/000141 WO2011136660A1 (en) | 2010-04-30 | 2011-04-28 | Farming system for aquatic organisms |
Country Status (2)
Country | Link |
---|---|
NO (1) | NO20100627A1 (en) |
WO (1) | WO2011136660A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014017920A1 (en) * | 2012-07-27 | 2014-01-30 | Jens Christian Holst | Floating production facility for farming of marine organ |
WO2018211513A1 (en) * | 2017-05-18 | 2018-11-22 | Latimeria Ltd. | Method and system for maintaining water quality |
WO2019233540A1 (en) * | 2018-06-06 | 2019-12-12 | Assentoft Holding Pdn Aps | Cleansing and recirculating system for aquaculture systems and a method for cleansing an aqueous medium from an aquaculture system |
CN112118733A (en) * | 2018-03-06 | 2020-12-22 | 海上整修有限公司 | Aquaculture tank comprising a main chamber and a peripheral annular chamber |
WO2024115688A1 (en) * | 2022-11-30 | 2024-06-06 | Alfa Laval Corporate Ab | Fish farming enclosure |
WO2024167411A1 (en) * | 2023-02-06 | 2024-08-15 | Searas As | Arrangement and method for treatment of water in a vessel for culture of marine organisms |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2018551A (en) * | 1978-04-12 | 1979-10-24 | Parker I S C | Activated sludge culture of fish |
US5636595A (en) * | 1992-06-01 | 1997-06-10 | Lunde; Trygve | Particle trap |
US7052601B2 (en) * | 2001-10-03 | 2006-05-30 | Eco Farm As | Process and means for the treatment of water in an aquaculture system |
-
2010
- 2010-04-30 NO NO20100627A patent/NO20100627A1/en not_active IP Right Cessation
-
2011
- 2011-04-28 WO PCT/NO2011/000141 patent/WO2011136660A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2018551A (en) * | 1978-04-12 | 1979-10-24 | Parker I S C | Activated sludge culture of fish |
US5636595A (en) * | 1992-06-01 | 1997-06-10 | Lunde; Trygve | Particle trap |
US7052601B2 (en) * | 2001-10-03 | 2006-05-30 | Eco Farm As | Process and means for the treatment of water in an aquaculture system |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014017920A1 (en) * | 2012-07-27 | 2014-01-30 | Jens Christian Holst | Floating production facility for farming of marine organ |
WO2018211513A1 (en) * | 2017-05-18 | 2018-11-22 | Latimeria Ltd. | Method and system for maintaining water quality |
CN112118733A (en) * | 2018-03-06 | 2020-12-22 | 海上整修有限公司 | Aquaculture tank comprising a main chamber and a peripheral annular chamber |
EP3761782A4 (en) * | 2018-03-06 | 2021-12-15 | Searas AS | Aquaculture cage comprising a main chamber and a peripheral ring chamber |
WO2019233540A1 (en) * | 2018-06-06 | 2019-12-12 | Assentoft Holding Pdn Aps | Cleansing and recirculating system for aquaculture systems and a method for cleansing an aqueous medium from an aquaculture system |
EP3801009A4 (en) * | 2018-06-06 | 2022-03-30 | Assentoft Holding PDN ApS | Cleansing and recirculating system for aquaculture systems and a method for cleansing an aqueous medium from an aquaculture system |
WO2024115688A1 (en) * | 2022-11-30 | 2024-06-06 | Alfa Laval Corporate Ab | Fish farming enclosure |
WO2024167411A1 (en) * | 2023-02-06 | 2024-08-15 | Searas As | Arrangement and method for treatment of water in a vessel for culture of marine organisms |
Also Published As
Publication number | Publication date |
---|---|
NO330681B1 (en) | 2011-06-06 |
NO20100627A1 (en) | 2011-06-06 |
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