GB2543924A - Collector for net cage and method for positioning of a collector in a net cage - Google Patents
Collector for net cage and method for positioning of a collector in a net cage Download PDFInfo
- Publication number
- GB2543924A GB2543924A GB1615652.3A GB201615652A GB2543924A GB 2543924 A GB2543924 A GB 2543924A GB 201615652 A GB201615652 A GB 201615652A GB 2543924 A GB2543924 A GB 2543924A
- Authority
- GB
- United Kingdom
- Prior art keywords
- collector
- balloon
- net cage
- fluid
- waste
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 13
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 239000002699 waste material Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims 1
- 241000251468 Actinopterygii Species 0.000 description 18
- 230000007704 transition Effects 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009372 pisciculture Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/44—Devices for emptying otherwise than from the top using reciprocating conveyors, e.g. jigging conveyors
-
- 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
- A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Zoology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fish Paste Products (AREA)
- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
- Meat, Egg Or Seafood Products (AREA)
- Removal Of Floating Material (AREA)
Abstract
Collector 1 for waste at a bottom of a net cage (2, fig 1), having an upper face designed to collect the waste and connected to a pump for removal of the waste. A balloon 6 is fastened to the upper face of the collector. The balloon 6 is connected to a hose 8 for supply and removal of a fluid having a density of less than water. The collector is positioned at the bottom of the net cage by utilising control lines in conjunction with supplying and removing fluid, in particular air, from the balloon in order to control the position of the collector
Description
Collector for net cage and method for positioning a collector in a net cage Background
For fish farms, numerous systems exist for removal of dead fish and other waste being collected in the bottom of a net cage. The most used system in Norway is from LiftUp AS and comprises a collector positioned at the bottom of the net inside the net cage, and a pump system comprising a compressor which supplies pressurized air down into the collector, wherein the waste that is collected inside the collector rise together with the air when the air rises to the surface. The principles of the system from LiftUp are well known for persons skilled in the art and is e.g. described in WO 2012/064201. Such a system to pump up dead fish and other waste is in the following referred to as an air ejector pump.
The collector in the system of LiftUp is designed with a conical lower face so that the lower face is resting against the net of the net cage when the collector is positioned completely in the tip of the net bag. The tip of the net cage is the deepest point of the net bag, and the bottom of the net bag is normally reinforced in the centre, so that it may carry the collector without risk of tearing and damaging of the net. Further, the collector is provided with ballast, both in order to maintain the shape of net cage, and to keep the collector on the spot during movements in the net cage and during pumping up of the waste. Both the conical lower face and the ballast is known from prior art. When fish in the net cage die, they gather in the area around the collector, and by using a pressure ejector pump, one may pump the dead fish through a pipe system to the surface for removal and treatment. The same regards other waste such as feed loss and feces that will also gather in the area around the collector.
The sizes of net cages for fish farming increases steadily and large net cages with a circumference of 100 to 200 meters and with a depth from 30 to 60 meters are being used today. Therefore, there is a need for using collectors having considerable ballast weight, the collectors may typically weigh from 450 to 1000 kg. The ballast weight is often galvanized steel being positioned in cavities of the collector. When large amounts of dead fish and other waste is to be pumped up, it is particularly important to keep the collectors in place at the bottom of the net cages.
When a new net cage is to be set up, or a net bag is replaced or similar on an existing net cage, the collectors must be placed at the bottom, preferably in the tip, of the net bag. When the net bag is lifted, the collector may be displaced from its original position, and must therefore be repositioned. The net bag is lifted e.g. when emptying the net cage and in some cases during bath treatment.
The most common method for positioning and installing collectors is by means of a crane on a boat or similar, and control lines that stretch out to opposing sides of the net cage. With the crane, the collector is positioned as far out from the edge of the net cage as possible, and thereafter control lines are used to position the collector before it is lowered down towards the tip of the bag. There should be at least one such control line, but there may be more, so that the positioning of the collector gets as accurate as possible before it is lowered.
This installation is both time- and work-consuming and the work is heavy and dangerous. Further, the positioning is not always successful, and the collector may not hit the reinforced area in the bottom of the net bag. When the collector hits the net in areas which are not reinforced, it may make holes or otherwise damage the net so that the risk for loosing fish or fish escaping increases. Escaping of fish has large negative consequences for the farmers and for the environment around the net cage. It is a well-known issue that farmed fish may mix with wild stock and contaminate these. In order to control the installation of collectors today, underwater cameras or divers are used in the water during the lowering, either inside the net cage or outside.
One object of the present invention is therefore to provide an improved and safer method for positioning of collectors. Further, it is an object that the method is possible to use even if there are winds and/or current in the area around the net cage. Finally, it is an object that devices and means that may harm the fish should not be used, neither during the positioning nor when installing the collector itself or as long as the collector is inside the net cage.
Another object is to facilitate the lifting of a collector in a net cage.
The objects are achieved with a collector as presented in claim 1, and a method as presented in claim 6. Further advantageous features are given in the corresponding dependent claims.
The invention regards a collector for waste at a bottom of a net cage, wherein an upper face of the collector is designed to collect the waste and to be connected to a pump for removing the waste. The upper face of the collector is the side of the collector facing upwards when installed in a net cage. Further, a balloon is fastened to the upper face and the balloon is connected to a hose for supply and removal of a fluid having a density less than water.
The upper face of the collector is preferably shaped so that a hose, such as a sucking hose from an air ejector pump may be installed. This may be performed in several ways which will be obvious for a person skilled in the art, and in a particularly preferred design, the upper face is designed in such a way that the hose for removal of dead fish and other waste, is arranged in immediate vicinity of the waste.
The balloon that is fastened to the collector may be made of a flexible material, in which the inner volume of the balloon increases when it is filled with fluid and reduced when the fluid is removed from the balloon. A floating unit may be connected to the balloon, preferably to the upper face of the balloon, so that the balloon stretches vertically up from the surface of the collector in which the waste is collected. The floating unit is intended to hold the balloon vertical even when there is no fluid in the balloon. In this way one avoids that the balloon gets in conflict with the entrance of the hose which removes the waste. A lower face of the collector is preferably shaped similar to the bottom of the net cage, so that the collector bears against the bottom and stays there. Further it is an advantage that the bottom is shaped conical, possibly as a frustrum. The invention also regards a method for positioning of a collector in accordance with the invention, the method comprising the following steps: - positioning the collector with at least one control line inside the net cage, the control line stretching to the edge of the net cage, - supplying fluid into the balloon until the collector floats at the surface, - adjusting the length of the control line until the collector is placed vertically above the desired position, - removing fluid from the balloon so that the collector sinks down in the net cage, - controlling the position of the collector by adjusting the length of the control line and the amount of fluid in the balloon until the collector is correctly positioned in the net cage.
The control line may be made of rope, a strap or any other convenient material. One or more control lines may be used depending on what is most convenient, both related to each net cage and location, but also depending on weather and current conditions.
The method may also comprise a step for releasing of the control line(s) so that this/these are no longer are connected to the collector after that the collector is positioned. Alternatively, the control line(s) may be fastened to the collector at all times and will be used when the collector is to be lifted again.
The control line(s) may be supplied with markers indicating when the collector is positioned in the middle of the net cage, before it is lowered. In this way it is easy to know when the collector is centred.
By "balloon" is in the present application, intended to mean any device that may be filled with a fluid having a density less than water, so that the buoyancy of the balloon increases, like a traditional balloon, e.g. a latex balloon, a diving balloon or similar. It may also just be a material that is non-permeable for fluid and shaped in a way that may contain an amount of fluid, and thereby produce buoyancy.
The material in the balloon shall preferably be collapsible in order for the volume inside the balloon to increase when filled with fluid, and to be reduced to a minimum in that the walls in the balloon collapse when the fluid flows out of the balloon. In an alternative embodiment, the balloon may be solid and e.g. get filled with water when it should not have buoyancy. When it is filled with fluid having a density less than water, the fluid will displace the water that already is inside the balloon. It is however an advantage that the balloon is designed so that its volume increases when the balloon is to have buoyancy, and that it has a small volume when not to have buoyancy, because currents in the water then will have drag in the balloon and therefore in the collector that the balloon is fastened to.
By the expression "fluid having a density less than water" is in this context intended to mean any gas or liquid having a density that is less than water, and therefore has buoyancy in water. In addition it must be possible to pump the fluid, and a preferred fluid is air taken from the environment.
The fluid is supplied to the balloon via separate pipes, and the amount to be supplied to the balloon must be possible to control accurately. Further, it may be necessary to let out some of the fluid to reduce the buoyancy so that the collector is lowered into the net cage. The fluid that is removed from the balloon may either be let out in the environment near the balloon, or it may be pumped to the surface.
In a preferred embodiment, the pump being used to remove dead fish and other waste from the net cage, is an air ejector pump as mentioned above. Thus, air tubes must run down to the collector, and these tubes may also be used for filling the balloon with air. In such an embodiment, valves must be arranged so that one may control whether the air flows into the collector to bring dead fish and waste to the surface, or into the balloon. There may also be a need to redraw air from the balloon, either via the same air pipe or otherwise.
Example
The invention will in the following be described with reference to the figures, presenting principal sketches of a system in accordance with the invention. The different parts of the figure may not necessarily be drawn in scale to each other, as the figures just illustrate the invention.
Fig. 1 presents a collector in accordance with the present invention positioned in the bottom of a net cage, and
Fig. 2 presents the collector in Fig. 1 in detail.
The following description of an exemplified embodiment refers to the drawings and the example is not intended to limit the invention as it is defined in the enclosed patent claims.
Reference throughout the description to "an embodiment" signifies that a particular feature, structure or property specified in connection with an embodiment is included in the least in one embodiment. The expressions "in one embodiment", "in a preferred embodiment" or "in an alternative embodiment" different places in the description does not necessarily point to the same embodiment. Further, the different features, structures or properties may be combined in any suitable way in one or more of the embodiments.
Fig. 1 presents a collector 1 according to the present invention, positioned in the bottom 2 of a fish farm. The upper face of the collector is shaped to collect waste, and the lower face is conical and bears against the bottom of the net cage. The upper face of the collector is further designed with a pipe transition 3 or a pipe union to be assembled to a vacuum hose 4 for removal of dead fish and other waste. In the embodiment shown in Fig. 1, dead fish and other waste is transported to the surface by means of an air ejector pump from Lift Up AS. The shown air ejector pump comprises an air hose 5 to guide the air down to the collector 1, and a hose 4 connected to the pipe transition 3 of the collector, to transport the waste up to the surface. The inlet to the hose 4 being connected to the pipe transition 3 will thus be in immediate vicinity of the collected waste. The pump also comprises several parts such as a compressor which is not shown in the Figures.
In Fig. 2, the collector of Fig. 1 is shown in detail. The collector 1 is connected to a balloon 6, as the balloon in inflated state may carry the weight of the collector 1 including possible equipment. The balloon is in the shown embodiment, fastened to the collector by ropes 7, straps or similar being fastened to the collector in a similar way as when the collector is to be lifted, e.g. by crane.
The balloon is used when the collector is to be installed and positioned at the right spot in the net cage, e.g. after the net bag in the net cage has been lifted. The upper part of the balloon is connected to an air hose 8, wherein the hose has a valve 9, for respectively supply and removal of air. In cases where the balloon 6 is made of a material that is collapsible, the balloon will be kept distended of the pressure from the air on the inside, and is pushed together by the back pressure from the water or air on the outside. By opening a valve 9 on the air hose 8, the air will therefore flow out of the balloon 6 and further out of the air hose while the balloon is compressed by the pressure from the water surrounding it. Therefore it may be sufficient with one air hose from the surface and the valve which adjusts whether air is to be pumped into the balloon or if it shall be let out. Further it is an advantage if the air hose 8 is connected to the upper part of the balloon 6, as air will first collect in the upper part.
The control unit for filling of the balloon is preferably positioned on a railing of a net cage in which the collector is to be positioned at the bottom. In some cases it may be an advantage to use two hoses, where each of the hoses has a valve so that filling and emptying of air may occur independent of each other. Good control of the degree of buoyancy for the balloon is then achieved by opening or closing the air valves.
On its upper part, the balloon is provided with a floating unit 10, because the balloon is to be positioned generally vertical and not getting in conflict with the inlet of the hose 4 transporting dead fish and other waste to the surface. This floating unit 10 may be any material suitable for the purpose, and should have sufficient buoyancy to keep the balloon 6 at a distance from the inlet of the hose 4.
When the collector is to be lowered into the net cage, the balloon is at first filled with air before the air is gradually let out so that the collector 1 sinks down in a controlled manner. If necessary, one may use one or more control lines (not shown) in order to alter the direction of the collector in case it moves out of position. The air is let controlled out of the balloon so that the buoyancy reduces gradually and the collector sinks until the lower face bears against the bottom 2 of the net cage. When the collector is at its correct place, all air is let out of the balloon 6 so that it collapses. If the position was not optimal at the first attempt, air may again be pumped into the balloon, until the collector lifts sufficiently to repeat the process.
The capacity of the balloon and the amount of fluid that must be filled into it must be carefully adjusted to the net weight of the collector in sea, so that the collector sinks or rises at a desired speed. The pressure on the outside of the balloon increases as the balloon sinks and this must be compensated. This is similar when the balloon is filled with fluid so that it rises in the water.
In the shown embodiment, the balloon 6 is attached to the lifting straps of the collector 1 and the balloon is not released from the collector even when it is in position. The balloon is always attached and connected to the collector at the bottom of the net cage which allows the operators of the farm to lift or lower the collector as they desire.
The method for using a collector 1 in accordance with the present invention is that to attach a balloon 6 to a collector of known type per se, and thereafter position the collector 1 inside the net cage. If the collector is at a boat, either because there has not been any collector in the net cage before or because the collector has been lifted up into the boat for other reasons, the collector must be moved over to the net cage, usually by crane from the boat and over a railing of the net cage. Thereafter the air supply to the balloon 6 is opened so that it gets filled until the collector 1 floats in the water. At least one control line must be attached to the collector, either while it is still in the boat or after it is lifted into the net cage. If several control lines are used, these must be distributed around the net cage in order to be able to control the movement of the collector by adjusting the lengths of the control lines. When the control lines are in position, and the balloon is sufficiently filled so that the collector is floatable, the collector is released from the crane and from the boat. The collector is moved to the centre of the net cage by adjusting the lengths of the control lines, and because the collector floats, this is not heavy work.
When the collector 1 is in the centre of the net cage, air is let out of the balloon 6 so that the collector starts to sink. The positioning of the collector and the speed at which it sinks is regulated with the control lines and the amount of air let out of the balloon. The length of the control line(s) must be adjusted so that the collector can sink. When the collector 1 begins to approach the bottom 2 of the net cage, the positioning is controlled, preferably with a underwater camera or a diver, and if the positioning is not correct and it is not possible to correct it with the control lines, air is filled into the balloon 6 again until the positioning may be corrected, and thereafter the air is let out again. When the position of the collector is to be altered by adjusting the lengths of the control lines, i.e. to pull the control lines at one side, of course the control lines on the opposite side have to be let out. This is evident for a person skilled in the art, and it is therefore not further described here. When the balloon is filled with a sufficient amount of air for balancing the weight of the collector, it is not heavy to pull the control lines so that the position is altered.
The invention is not limited to the shown and described embodiments, but comprises modifications and amendments of the invention as defined in the attached claims.
Claims (7)
1. Collector (1) for waste at a bottom (2) of a net cage, wherein an upper face is designed for collecting the waste and to be connected to a pump for removal of the waste, characterized in that a balloon (6) is fastened to the upper face, and that the balloon (6) is connected to a hose (8) for supply and removal of a fluid having a density less than water.
2. Collector (1) according to claim 1, characterized in that the fluid is air.
3. Collector (1) according to claim 1 or 2, characterized in that the balloon (6) is made in a flexible material, and wherein the inner volume of the balloon increases if filled with fluid and decreases if the fluid is removed from the balloon.
4. Collector (1) according to any one of the previous claims, characterized in that a floating unit (10) is connected to the balloon (6), so that the balloon stretches vertically up from the upper face of the collector wherein the waste is collected.
5. Collector (1) according to any one of the previous claims, characterized in that a lower face of the collector is designed corresponding to a bottom of the net cage, preferably shaped as a cone.
6. Method for positioning of a collector (1) according to any one of claims 1 - 5, in a net cage, characterized by comprising the following steps: - placing the collector (1) with at least one control line inside the net cage, the control line(s) stretching to the edge of the net cage, - supplying fluid into the balloon (6) until the collector (1) floats in the water surface, - adjusting the length of the control line(s) until the collector (1) is placed generally vertically above the desired position, - removing fluid from the balloon (6) so that the collector sinks down in the net cage, - controlling the position of the collector (1) by adjusting the length of the control line(s) and the amount of fluid in the balloon (6) until the collector is correctly positioned in the net cage.
7. Method according to claim 6, characterized by comprising an additional step of releasing the control line(s) so that they are no longer connected to the collector.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20151184A NO339199B1 (en) | 2015-09-14 | 2015-09-14 | Fish cage collector and method for positioning a collector in a fish cage |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201615652D0 GB201615652D0 (en) | 2016-10-26 |
| GB2543924A true GB2543924A (en) | 2017-05-03 |
| GB2543924B GB2543924B (en) | 2020-09-30 |
Family
ID=57544105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1615652.3A Active GB2543924B (en) | 2015-09-14 | 2016-09-14 | Collector for net cage and method for positioning a collector in a net cage |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2543924B (en) |
| NO (1) | NO339199B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018169412A1 (en) * | 2017-03-17 | 2018-09-20 | Servicebåt As | Method for distinguishing alive and dead fish |
| GB2563996A (en) * | 2017-05-11 | 2019-01-02 | Lift Up As | System for selective waste removal from aquaculture unit |
| CN112281790A (en) * | 2020-11-30 | 2021-01-29 | 南方海洋科学与工程广东省实验室(湛江) | Cage dead fish collecting robot |
| EP4098113A1 (en) | 2021-06-01 | 2022-12-07 | Alfa Laval Corporate AB | Water transporting device and method |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO344087B1 (en) * | 2017-03-17 | 2019-09-02 | Servicebaat As | Procedure for emergency processing of fish at a fish farm |
| NO20171622A1 (en) * | 2017-10-11 | 2019-04-08 | Lift Up As | System and method for removal of waste from fish cages |
| NO343692B1 (en) * | 2017-11-10 | 2019-05-13 | Lift Up As | Waste collection system in closed aquaculture cages |
| NO344657B1 (en) * | 2018-11-14 | 2020-03-02 | Lift Up As | Collector for waste at the bottom of a breeding cage, and an element for use at such a collector |
| NO20191304A1 (en) * | 2019-10-31 | 2021-03-08 | Charvest As | Device and method for collection of fish |
| CN113115733B (en) * | 2021-04-19 | 2022-02-25 | 中国水产科学研究院南海水产研究所 | Over-and-under type aquaculture net case suitable for offshore wind power generation |
| CN113367091B (en) * | 2021-07-19 | 2022-08-19 | 中国水产科学研究院东海水产研究所 | Live fish transfer device for pseudosciaena crocea relay breeding |
| CL2022000386A1 (en) * | 2022-02-16 | 2022-09-09 | Envirolift Spa | Settleable solids collecting device for fish culture cage |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012064201A1 (en) * | 2010-11-12 | 2012-05-18 | Liftup Akva As | Construction of a pumping system and uses thereof |
| WO2016166325A1 (en) * | 2015-04-15 | 2016-10-20 | ØPD Group AS | Buoyancy module for an aquaculture pumping system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1127014A (en) * | 1980-05-02 | 1982-07-06 | Ralph T. Sommerville | Underwater lifting balloon |
| US4766846A (en) * | 1986-10-07 | 1988-08-30 | Aquiculture Climax Concept Inc. | System and method for the culture of mollusks |
-
2015
- 2015-09-14 NO NO20151184A patent/NO339199B1/en unknown
-
2016
- 2016-09-14 GB GB1615652.3A patent/GB2543924B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012064201A1 (en) * | 2010-11-12 | 2012-05-18 | Liftup Akva As | Construction of a pumping system and uses thereof |
| WO2016166325A1 (en) * | 2015-04-15 | 2016-10-20 | ØPD Group AS | Buoyancy module for an aquaculture pumping system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018169412A1 (en) * | 2017-03-17 | 2018-09-20 | Servicebåt As | Method for distinguishing alive and dead fish |
| GB2563996A (en) * | 2017-05-11 | 2019-01-02 | Lift Up As | System for selective waste removal from aquaculture unit |
| GB2563996B (en) * | 2017-05-11 | 2021-09-29 | Lift Up As | System for selective waste removal from aquaculture unit |
| CN112281790A (en) * | 2020-11-30 | 2021-01-29 | 南方海洋科学与工程广东省实验室(湛江) | Cage dead fish collecting robot |
| CN112281790B (en) * | 2020-11-30 | 2024-05-24 | 南方海洋科学与工程广东省实验室(湛江) | Dead fish collecting robot of net cage |
| EP4098113A1 (en) | 2021-06-01 | 2022-12-07 | Alfa Laval Corporate AB | Water transporting device and method |
| WO2022253761A1 (en) | 2021-06-01 | 2022-12-08 | Alfa Laval Corporate Ab | Water transporting device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2543924B (en) | 2020-09-30 |
| NO20151184A1 (en) | 2016-11-14 |
| NO339199B1 (en) | 2016-11-14 |
| GB201615652D0 (en) | 2016-10-26 |
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