NO347049B1 - A treatment system and a method for treatment of slaughtered fish - Google Patents
A treatment system and a method for treatment of slaughtered fish Download PDFInfo
- Publication number
- NO347049B1 NO347049B1 NO20220096A NO20220096A NO347049B1 NO 347049 B1 NO347049 B1 NO 347049B1 NO 20220096 A NO20220096 A NO 20220096A NO 20220096 A NO20220096 A NO 20220096A NO 347049 B1 NO347049 B1 NO 347049B1
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- Norway
- Prior art keywords
- fish
- cooling tank
- water
- treatment system
- fluidly connected
- Prior art date
Links
- 241000251468 Actinopterygii Species 0.000 title claims description 212
- 238000011282 treatment Methods 0.000 title claims description 55
- 238000000034 method Methods 0.000 title claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 185
- 238000001816 cooling Methods 0.000 claims description 162
- 238000003860 storage Methods 0.000 claims description 33
- 238000009826 distribution Methods 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 230000032258 transport Effects 0.000 description 32
- 238000005057 refrigeration Methods 0.000 description 12
- 239000012530 fluid Substances 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B4/00—General methods for preserving meat, sausages, fish or fish products
- A23B4/06—Freezing; Subsequent thawing; Cooling
-
- A—HUMAN NECESSITIES
- A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
- A22B—SLAUGHTERING
- A22B5/00—Accessories for use during or after slaughtering
-
- A—HUMAN NECESSITIES
- A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
- A22C—PROCESSING MEAT, POULTRY, OR FISH
- A22C25/00—Processing fish ; Curing of fish; Stunning of fish by electric current; Investigating fish by optical means
- A22C25/02—Washing or descaling fish
Description
The present invention is related to a treatment system and a method for treatment of slaughtered fish, including cooling and bleeding out of slaughtered fish.
In the treatment of fish after the fish have been killed, there are various stages that are usually performed. After the fish are killed, they are commonly bleed out. The fish are also gutted. The fish that has been bleed out and/or gutted, needs to be cooled down and kept at a low temperature in order to maintain the quality of the meat. The dead fish also needs to be cleaned in order to avoid the fish meat to get spoiled.
In existing facilities for treatment of slaughtered fish, a separate cooling and bleeding tank is commonly used comprising a screw which transports the fish through the tank. The tank is filled with cold water and screw, which is arranged in the tank, is provided with a helically shaped wall mounted on a central drive shaft. The helically shaped wall is provided with a diameter that covers the inner diameter of the tank such that when the drive shaft is rotating the helically shaped wall will gradually, depending on rotational speed of the drive shaft, advance the fish through the tank. As the fish is advanced through the tank, it is bled out and cooled down.
These tanks are costly and require regular inspection and maintenance. They also require power to run which adds to the cost of cooling and bleeding out of the slaughtered fish.
US1700547 describes a device and a method for killing and preserving fish, wherein the fish is killed instantly by the shock of emersion in a rapid cooling fluid. There are no means to ensure that the fish leaves in substantially the same order as they enter, and thereby to ensure that each fish is equally cooled down to a desired temperature in the tank.
Thus, an object of the present invention has therefore been to provide a better system for bleeding out and cooling of slaughtered fish.
It has also been an object to provide a treatment system which is cheaper and easier to manufacture than the current devices used for treatment of dead fish.
It has also been an object to provide a treatment system that requires little maintenance.
It has also been an object to provide a treatment system with low operating costs.
Another object has been to ensure sufficient cleaning of the dead fish.
These objects are met with a system for treatment of dead fish as defined in claim 1, and a method for treatment of dead fish as defined in claim 13, a use of the treatment system as defined in claim 16 and a use of the method for treatment of dead fish as defined in claim 17. Further embodiments of the present invention is defined in the dependent claims.
Hence, there is provided a treatment system for dead fish where the treatment system comprises a cooling tank which is, during operation, at least partially filled with cold water. The cooling tank comprises a cooling tank fish inlet to which a first fish transport pipe can be attached for transport of dead fish to the cooling tank, and a cooling tank fish outlet through which cooled fish is transported out of the cooling tank. The cooling tank further comprises a water inlet to which a water pipe can be attached such that cold water can be fed into the cooling tank, and a water outlet through which water in the cooling tank is removed from the cooling tank. The cooling tank fish inlet is arranged at, in or near a top portion of the cooling tank and the cooling tank fish outlet is arranged at, in or near a bottom portion of the cooling tank. Thereby, fish leaves the cooling tank in substantially the same order that they entered the cooling tank.
Since the fish that enters the cooling tank lands on top of the mix of water and fish in the cooling tank, the fish will gradually sink at substantially the same speed towards the bottom of the tank and hence, the fish will enter the cooling tank and leave the cooling tank in roughly the same order. This also allows for the fish to be kept for a desired time period, or residence time, in the cooling tank such that the fish is cooled down to a desired temperature and at the same time is cleaned when the fish leaves the cooling tank. The dead fish can be bleeded out fish or fish that has also been gutted.
The cooling tank is a simple structure without moving parts and is therefore cheap to manufacture and easy to maintain and to keep clean. Furthermore, the dead fish is normally bleeded out fish or gutted fish and while the fish is spending time in the cooling tank, it is both cooled down and cleaned by the water that is present in the cooling tank.
The treatment system preferably further comprises a dewatering device for draining or removal of water, where the dewatering device is fluidly connected to the cooling tank fish outlet with an intermediate fish transport pipe for transport of fish from the cooling tank to the dewatering device.
The dewatering device may comprise a dewatering canal in which water is drained out while fish is allowed to pass through, and a water compartment for storage of water that has been drained out.
The dewatering device is further provided with a particle remover for removal of particles in the drained water. The particle remover may, for example, comprise a filter with a grating device comprising holes that allows water to pass through and particles, which are larger than a desired size, to be retained. The particle remover is preferably arranged between the dewatering canal and the water compartment.
The treatment system further preferably comprises a drain water system which is fluidly connected to the dewatering device, preferably to the water compartment of the dewatering device, and to the cooling tank such that water can be pumped from the dewatering device and back to the cooling tank, whereby fish and water is drawn from the cooling tank through the intermediate fish transport pipe to the dewatering tank. When the water is circulated in this way, a suction effect is created which draws fish and water from the cooling tank to the dewatering device. The water is preferably fed into the cooling tank at the upper portion of the cooling tank.
The drain water system preferably comprises drain water pipe grid comprising a number of pipes that are fluidly connected to each other and to desired locations in the treatments system such that drained water can be flowed from one location to another location as desired.
The drain water system preferably further comprises at least one pump device and a number of valve devices arranged in the pipes of the drain water pipe grid such that water can be flowed from one location to another location as desired.
The dewatering device can be fluidly connected to the drain water system with a first drain water pipe. The first drain water pipe may be provided with a valve device which controls the flow of water from the dewatering device to the drain water system.
The drain water system may further comprise a water treatment device which is which is fluidly connected to the drain water system such that at least a portion of the water in the drain water system can be taken out and flowed to the water treatment device. After the water has been treated, it may be returned to the drain water system, preferably to the drain water storage.
The cooling tank and the intermediate fish transport pipe is preferably arranged so that a lowest part is created. The lowest part of the cooling tank and/or the intermediate fish transport pipe may also be fluidly connected to the drain water system such that water can be flowed from the cooling tank and/or the intermediate fish transport pipe to the drain water system. A second drain water pipe may be fluidly connected to the lowest part of the cooling tank and/or the intermediate fish transport pipe and to the drain water system. In addition, the second drain water pipe may be provided with a valve device so that the flow of water through the second drain water pipe can be controlled.
The treatment system may further comprise a fish distributing device which is fluidly connected to the dewatering device, and where the fish distribution device is fluidly connected to at least one fish storage tank such that fish can be transported from the dewatering device to the fish distributing device and further to the at least one fish storage tank.
The dewatering device is preferably fluidly connected to the fish distributing device with a second fish transport pipe.
Preferably, the fish distributing device is fluidly connected to a plurality of fish storage tanks such that fish can be selectively transported from the fish distribution device to the fish storage tanks. The fish distribution device is preferably connected to the plurality of fish storage tanks with respective third fish transport pipes. In addition, each third fish transport pipe may be provided with a valve device in order to control the flow of fish from the fish distribution device to the individual fish storage tanks.
The fish distributing device may comprise a distributing chute and the plurality of third fish transport pipes can be fluidly connected to the distributing chute and to respective fish storage tanks.
In case there is a need for emptying the cooling tank, the cooling tank may be fluidly connected to a pump device such that the water and the fish in the cooling tank can be pumped out of the cooling tank. The pump device should be capable of raising the pressure in the cooling tank to a level where the fish and the water in the cooling tank is pressed out of the cooling tank and to the dewatering device.
There is also provided a method for treatment of dead fish in a cooling tank, where the method comprises the following steps:
- feeding water into the cooling tank such that the cooling tank is at least partially filled with water,
- feeding dead fish into the cooling tank through a cooling tank fish inlet arranged in a top portion of the cooling tank whereby fish will gradually sink towards a bottom portion of the cooling tank,
- removing water from the cooling tank and feeding cold water into the water tank such that the water in the cooling tank is kept at desired temperature,
- removing dead fish from the cooling tank through a cooling tank fish outlet arranged in the bottom portion of the cooling tank at a rate that provides a desired residence time in the cooling tank for the fish.
It should be mentioned that the steps of the method above do not have to be performed in the same order as listed. When the method is performed, the steps can be performed intermittently and repeatedly as necessary. Alternatively, the one, some or all of the steps can be performed in a continuous way.
The amount of fish that is fed into the cooling tank over time is preferably substantially the same as the amount of fish that is removed from the cooling tank over the same period of time.
The residence time, i.e. the time it takes for the fish to pass through the cooling tank, from the fish lands on top of the mix of water and fish in the cooling tank to the fish has sunk down through the cooling tank to the bottom portion of the cooling tank, may for example, be around 10 minutes. The residence time may, however, be adjusted to any desired residence time by adjusting the rate at which fish and water is fed into the cooling tank and removed from the cooling tank.
The method preferably further comprises the step of transporting fish from the cooling tank to a dewatering device in which water is drained out.
The method preferably further comprises the step of feeding drained water from the dewatering device into the cooling tank, whereby fish and water is drawn from the cooling tank to the dewatering device.
A system for treatment of dead fish comprising one, some or all the features described herein, is suitable for use on a vessel.
A method for treatment of dead fish comprising one, some or all the features described herein, is suitable for use on a vessel.
A non-limiting embodiment of the present invention will now be described with reference to the attached figure, where:
Figure 1 shows a schematic diagram of a system for treatment of dead fish according to the present invention.
The attached figure 1 diagrammatically shows an embodiment of a treatment system for dead fish, typically bleeded out fish or gutted fish, according to the present invention.
The dead fish is transported through a first transport conduit 12 from, for example, a storage tank that may comprise refrigerated water, typically sea water if the treatment system is arranged on a vessel, to a cooling tank 14. The first fish transport conduit 12 may be a closed conduit, such as a p ipe, tube or similar device, or an open conduit.
The cooling tank 14 has a top portion 15 near or adjacent to the top of the cooling tank 14 and a bottom portion 16 near or adjacent to the bottom of the cooling tank 14. The first transport pipe conduit 12 is fluidly connected to a cooling tank fish inlet 17 so that dead fish can be fed into the cooling tank 14. The cooling tank fish inlet 17 is arranged in the top portion 15 of the cooling tank 14 such that dead fish that is fed into the cooling tank 14 land on top of water and fish that is already present in the cooling tank 14.
The cooling tank 14 is further provided with a cooling tank fish outlet 18 through which dead fish and water leaves the cooling tank 14. The cooling tank fish outlet 18 is arranged in the bottom portion 16 of the cooling tank. The cooling tank fish outlet is preferably arranged at the lowermost point in the cooling tank 14, as indicated in the figure, to prevent dead fish and water to remain in the cooling tank 14. Furthermore, the bottom of the cooling tank 14 is preferably arranged so that it slopes towards the cooling tank fish outlet 18 as indicated in the figure.
The cooling tank 14 is further fluidly connected to a water refrigeration system (not shown in the figure) such that the water in the cooling tank 14 can be circulated between the cooling tank 14 and the water refrigeration system in order to keep the water in the cooling tank 14 substantially at a desired temperature over time.
The cooling tank is provided with a cooling water inlet 19 and a cooling water outlet 20. A first water pipe 22 is fluidly connected to the cooling water inlet 19 and the refrigeration system, and a second water pipe 25 is fluidly connected to the cooling water outlet 20 and the refrigeration system. To avoid particles over a given size to be transported with the water to the refrigeration system, the cooling tank 14 can be provided with a filter device 21 that covers the cooling water outlet 20 such that the water has to flow through before entering the second water pipe 25 and particles in the water can be prevented from following the water to the refrigeration system.
To control the flow of cold water from the refrigeration system to the cooling tank 14, the first water pipe 22 may be provided with a valve 23.
Similarly, to control the flow of water from the cooling tank 14 to the refrigeration system, the second water pipe 25 may be provided with a valve device 26. A flow meter 24 may also be provided that is capable of measuring the volume of water flowing through the first water pipe 22.
The treatment system 10 further preferably further comprises an intermediate fish transport pipe 33 and a dewatering device 36. The intermediate fish transport pipe 33 is fluidly connected to the cooling tank fish outlet 18 in one end and to the dewatering device 36 in the other end such that dead fish and water can be transported from the cooling tank 14 to the dewatering device 36. The flow of dead fish and water through the intermediate fish transport pipe 33 can be controlled by a valve device 34 as indicated in the figure.
The dewatering device 36 comprises a dewatering container 37 with an upper portion 38 and a lower portion 39. The dewatering container 37 comprises a dewatering container inlet 40 and a dewatering container outlet 41, where both preferably are arranged in the upper portion 38 of the dewatering container 37.
The dewatering device 36 further comprises a dewatering conduit 42 which is arranged between the dewatering container inlet 40 and the dewatering container outlet 41 so that fish and water passing through the intermediate fish transport pipe 33 continues into the dewatering conduit 42.
The dewatering conduit 42 is provided with draining devices which drain as much of the water as possible. The draining devices can be through-going holes or openings of any shape and size that allow water to flow through the holes or openings and further into a water compartment 44, and the dead fish to pass through the dewatering conduit 42 without being damaged. The water compartment is preferably made up of the lower portion 39 of the dewatering container 37 and possibly extending upwards up to a desired height.
The dewatering device 36 may further be provided with a particle remover 43. The particle remover 43 can be arranged in the dewatering container 37 such that drained water passes through it before reaching the water compartment 44. The particle remover 43 may comprise any suitable filter device (not shown in the figures) that is capable of removing particles with a size above a given size before the drained water enters the water compartment 44. Furthermore, the filter device is preferable removably arranged in the dewatering container 37 so that a filter device according to need can be installed and a used filter can be removed for cleaning and/or maintenance.
The treatment system 10 preferably further comprises a fish distribution device 49 which is fluidly connected to the dewatering device 36. The fish distribution device 49 is provided with a fish distribution device inlet 54. The treatment system 10 is preferably provided with a second fish transport conduit 47 that is fluidly connected to the dewatering container outlet 41 and the fish distribution device inlet 54 such that dead fish can be transported from the dewatering device 36 to the fish distribution device 49. The second fish transport conduit 47 may be a closed conduit, such as a pipe, tube or similar device, or an open conduit.
The fish distribution device 49 is preferably provided with a distributing chute 50 which is fluidly connected to the fish distribution device inlet 54 such that the fish that is transported through the second fish transport conduit 47 enters the distributing chute 50. The distributing chute 50 is fluidly connected to at least one, but preferably a plurality of fish storage tanks 53. Each fish storage tank 53 is fluidly connected to the fish distributing chute 50 with a third fish transport conduit 51. The third fish transport conduits 51 may be closed conduits, such as pipes, tubes or similar devices, and/or open conduits.
Each of the third fish transport conduits 51 are preferably provided with a suitable valve device 52 that can control the flow of fish through the individual third fish transport conduits 51 to their respective fish storage tanks 53.
In the figure, the distributing chute 50 is shown, as an example, connected to three fish storage tanks 53, but may of course be connected to any suitable number of fish storage tanks 53.
The fish storage tanks 53 are preferably provided with cold water that will keep the fish cooled down at a desired temperature. The fish storage tanks 53 are therefore preferably fluidly connected to a water refrigeration system (not shown in the figure) so that the water can be circulated between the fish storage tanks 53 and the water refrigeration system in order to keep the water in the fish storage tanks 53 at a desired temperature.
The water refrigeration system can be the same refrigeration system that is used to keep the water in the cooling tank 14 at the desired temperature.
The fish distribution device 49 is further preferably provided with a bilge pump 69. The bilge pump 49 can be fluidly connected to the distributing chute 50 with a bilge pump fluid pipe 70 so that excess water in the distributing chute 50 can be removed. The bilge pump fluid pipe 70 may be provided with a valve device 71 to control the flow of water through the bilge pump fluid pipe 70.
As indicated in the figure, the cooling tank 14 may also be fluidly connected to a vacuum pump (not shown in the figure) with a fluid pipe 28. The fluid pipe 28 may be provided with a valve device 29 which controls the flow of fluid through the fluid pipe 28. When there is a need to empty the cooling tank 14, the vacuum pump can be used to increase the pressure in the cooling tank 14 so that the fish and the water is pressed out of the cooling tank 14 through the intermediate fish transport pipe 33 and further on to the dewatering device 36 and the fish distributing device 49. For safety reasons, to avoid dangerously high pressures in the cooling tank 14, the cooling tank 14 is further preferably provided with an over pressure relief valve 30.
The treatment system 10 preferably further comprises a drain water system 56 that collects water from the treatment system 10 at various points, such as the dewatering device 36, and returns at least a portion of the water to the cooling tank 14, while a portion may be removed and flowed to a drain water treatment device 60. The drain water system comprises a drain water storage, indicated at 57A, 57B, 57C, 57D, and water pipes that can be fluidly connected together in a drain water pipe grid 58 as indicated in the figure. The drain water storage indicated at 57A is water flowing from the drain water storage into the drain water pipe grid 58, the drain water storage indicated at 57B is water bleed off from the drain water pipe grid 58 to the drain water storage, the drain water storage indicated at 57C is overflow of water that is flowed back to the drain water storage, and the drain water storage indicated at 57D indicates preloading of water into the cooling tank 14 at the start before dead fish is fed into the cooling tank. Preferably, about half of the cooling tank 14 is filled with water when dead fish is started to be fed into the cooling tank 14.
Valve devices 59 are preferably arranged at certain locations in the drain water pipe grid 58, as indicated in the figure, and the drain water pipe grid 58 is provided with at least one pump device 61 such that water can be pumped from one location within the drain water pipe grid 58 to another location in the drain water pipe grid 58 as is needed.
Obviously, there are many possible configurations of the drain water pipe grid of such a drain water system 56 which can be configured differently depending on the needs and requirements of any given installation. Thus, the drain water system 56 shown in the figure is just one of many possible configurations.
Preferably, the water compartment 44 of the dewatering device 36 is fluidly connected to the drain water pipe grid 58 with a first drain water pipe 66. The first drain water pipe 66 is preferably provided with a valve device 59 that so that is capable of controlling the flow of water from the water compartment 44 to the drain water pipe grid 58. The drain water pipe grid 58 is fluidly connected to the upper portion 15 of the cooling tank 14. Water can therefore be pumped from the dewatering device 36 to the cooling tank 14. This causes fish and water at the bottom portion 16 of the cooling tank 14 to be drawn from the cooling tank 14, through the intermediate fish transport pipe 33 and to the dewatering device 36.
The lowest part of the cooling tank 14 and/or the intermediate fish transport pipe 33 is also preferably fluidly connected to the drain water pipe grid 58. A second drain water pipe 66 can be fluidly connected to the lowest point of the cooling tank 14 and/or the intermediate fish transport pipe 33 as indicated in the figure. The second drain water pipe 66 may be provided with a suitable valve device such that the flow of water through the second drain water pipe 66 can be controlled.
Claims (17)
1. A treatment system (10) for dead fish, the treatment system comprising a cooling tank (14) which is, during operation, at least partially filled with water, the cooling tank (14) comprising:
- a cooling tank fish inlet (17) to which a first fish transport conduit (12) can be attached for transport of dead fish to the cooling tank (14),
- a cooling tank fish outlet (18) through which cooled fish is transported out of the cooling tank (14),
- a water inlet (19) to which a first water pipe (22) can be attached such that cold water can be fed into the cooling tank (14),
- a water outlet (20) to which a second water pipe (25) can be attached such that water in the cooling tank can be removed from the cooling tank,
characterized in that the cooling tank fish inlet (17) is arranged at, in or near a top portion (15) of the cooling tank (14) and the cooling tank fish outlet (18) is arranged at, in or near a bottom portion (16) of the cooling tank (14) such that fish leaves the cooling tank (14) in substantially the same order that they entered the cooling tank (14).
2. The treatment system according to claim 1,
wherein the treatment system (10) comprises a dewatering device (36) for draining of water, the dewatering device (36) being fluidly connected to the cooling tank fish outlet (18) with an intermediate fish transport pipe (33) for transport of fish from the cooling tank (14) to the dewatering device (36).
3. The treatment system according to claim 2,
wherein the dewatering device (36) comprises a dewatering conduit (42) in which water is drained out while fish is allowed to pass through, and a water compartment (44) for storage of drained water.
4. The treatment system according to claim 2 or 3,
wherein the dewatering device (36) is further provided with a particle remover (43) for removal of particles in the drained water.
5. The treatment system according to one of the claims 2-4,
wherein the treatment system (10) comprises a drain water system (56) which is fluidly connected to the dewatering device (36) and to the cooling tank (14) such that water can be pumped from the dewatering device (36) and back to the cooling tank (14), whereby fish and water is drawn from the cooling tank (14) through the intermediate fish transport pipe (33) to the dewatering device (36).
6. The treatment system according to claim 5,
wherein the drain water system (56) comprises a water treatment device (60) which is which is fluidly connected to the drain water system (56) such that at least a portion of the water in the drain water system (56) can be taken out and flowed to the water treatment device (60).
7. The treatment system according to claim 5 or 6,
wherein a lowest part of the cooling tank (14) and/or the intermediate fish transport pipe (33) is fluidly connected to the drain water system (56) such that water can be flowed from the cooling tank (14) and/or the intermediate fish transport pipe (33) to the drain water system (56).
8. The treatment system according to one of the claims 2-7,
wherein the treatment system (10) comprises a fish distributing device (49) which is fluidly connected to the dewatering device (36), and the fish distributing device (49) is fluidly connected to at least one fish storage tank (53) such that fish can be transported from the dewatering device (36) to the fish distributing device (49) and further to the at least one fish storage tank (53).
9. The treatment system according to claim 8,
wherein the fish distributing device (49) is fluidly connected to a plurality of fish storage tanks (53) such that fish can be selectively transported from the fish distribution device (49) to any of the fish storage tanks (53).
10. The treatment system according to claim 9,
wherein the fish distributing device (49) comprises a distributing chute (50) and a plurality of third fish transport pipes (51) that are fluidly connected to the distributing chute (50) and to respective fish storage tanks (53).
11. The treatment system according to one of the claims 1-10,
wherein the cooling tank (14) is fluidly connected to a pump device that is capable of increasing the pressure in the cooling tank (14) such that the water and the fish in the cooling tank (14) can be pumped out of the cooling tank (14).
12. The treatment system according to one of the claims 1-11,
wherein the dead fish is gutted fish or bleeded out fish.
13. A method for treatment of dead fish in a cooling tank (14), the method comprising the following steps:
− feeding water into the cooling tank (14) such that the cooling tank (14) is at least partially filled with water,
− feeding dead fish into the cooling tank (14) through a cooling tank fish inlet (17) arranged in a top portion (15) of the cooling tank (14), whereby fish will gradually sink towards a bottom portion of the cooling tank (14),
− removing water from the cooling tank (14) and feeding cold water into the water tank (14) such that the water in the cooling tank is kept at a desired temperature,
− removing dead fish from the cooling tank through a cooling tank fish outlet (18) arranged in a bottom portion (16) of the cooling tank (14) at a rate that provides a desired residence time in the cooling tank (14) for the fish.
14. The method according to claim 13,
the method further comprising the step of transporting fish from the cooling tank (14) to a dewatering device (36) in which water is drained out.
15. The method according to claim 14,
the method further comprising the step of feeding drained water from the dewatering device (36) into the cooling tank (14), whereby fish and water is drawn from the cooling tank (14) to the dewatering device (36).
16.Use of a treatment system for dead fish according to any one of the claims 1-12, on a vessel.
17. Use of a method for treatment of dead fish according to any one of claims 13-15, on a vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20220096A NO347049B1 (en) | 2022-01-21 | 2022-01-21 | A treatment system and a method for treatment of slaughtered fish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20220096A NO347049B1 (en) | 2022-01-21 | 2022-01-21 | A treatment system and a method for treatment of slaughtered fish |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO20220096A1 NO20220096A1 (en) | 2023-05-02 |
| NO347049B1 true NO347049B1 (en) | 2023-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20220096A NO347049B1 (en) | 2022-01-21 | 2022-01-21 | A treatment system and a method for treatment of slaughtered fish |
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| Country | Link |
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| NO (1) | NO347049B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4700547A (en) * | 1985-04-25 | 1987-10-20 | Takeshi Hayashi | Method for instantly killing and cooling fish, and an apparatus for carrying out this method |
| NO165974B (en) * | 1989-04-14 | 1991-01-28 | Norsk Hydro As | COOLING EQUIPMENT FOR COOLING FRESH, SPECIAL FISH. |
| EP1293129A2 (en) * | 1995-07-03 | 2003-03-19 | Svein Olav Fjaera | Process and plant for handling fish from its delivery to gutting thereof |
| WO2018166704A1 (en) * | 2017-03-15 | 2018-09-20 | Nordischer Maschinenbau Rud. Baader Gmbh + Co. Kg | Assembly and method for processing fish |
-
2022
- 2022-01-21 NO NO20220096A patent/NO347049B1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4700547A (en) * | 1985-04-25 | 1987-10-20 | Takeshi Hayashi | Method for instantly killing and cooling fish, and an apparatus for carrying out this method |
| NO165974B (en) * | 1989-04-14 | 1991-01-28 | Norsk Hydro As | COOLING EQUIPMENT FOR COOLING FRESH, SPECIAL FISH. |
| EP1293129A2 (en) * | 1995-07-03 | 2003-03-19 | Svein Olav Fjaera | Process and plant for handling fish from its delivery to gutting thereof |
| WO2018166704A1 (en) * | 2017-03-15 | 2018-09-20 | Nordischer Maschinenbau Rud. Baader Gmbh + Co. Kg | Assembly and method for processing fish |
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| Publication number | Publication date |
|---|---|
| NO20220096A1 (en) | 2023-05-02 |
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