JPH06296447A - Method for supplying water for fish or shellfish and device therefor - Google Patents

Abstract

PURPOSE:To hygienically, easily and rapidly supply water for fishes and shellfish es into a water tank for alive fishes or shellfishes in a stable water quality at a suitable water temperature without using a large volume of natural sea water, etc., for the alive fishes or shellfishes. CONSTITUTION:The characteristic of this method for supplying water for fishes or shellfishes comprises holding muddy substance-removed and sterilized sea water in circulation type pipings controlled to plural different water temperatures, respectively, by a heat exchange method, the salt concentration and the dissolved oxygen content of the sea water being controlled, always, suitably and rapidly mixing the water having the various temperature at a using point, and supplying the water mixture having desired water temperature, water quality and water volume, and a device therefor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides seafood water suitable for live fish, and is particularly useful for fisheries markets and live fish centers.
The present invention relates to a method and a device for providing live fish water suitable for large-scale restaurants, restaurants, etc.

[0002]

2. Description of the Related Art Conventionally, the provision of water for seafood suitable for display in aquariums or the provision of conditions for raising seafood in aquaculture is large-scale and long-term For the purpose of economically providing suitable breeding conditions for, for example, water temperature, salinity concentration, dissolved oxygen concentration, turbidity removal and sterilization of other breeding water conditions in close proximity to a tank for breeding seafood. It is the idea for a method and a device to provide these waters that the equipment for adjusting is provided.

In addition, in small-scale water tanks for stores such as sushi restaurants, water temperature and water quality management is carried out in accordance with the water tank for viewing, such as the use of artificial seawater, the use of thermostats and the use of filtration devices. In these cases, the water temperature and water quality are controlled according to the aquarium for appreciation because the type of seafood to be handled is generally decided, it is practically a very short period, and the main purpose is to exhibit. is there.

On the other hand, the provision of water for seafood suitable for live fish has the following characteristics, unlike the case of provision of water for seafood in the aquarium and the aquaculture mentioned above. That is, 1. Unlike exhibitions and aquaculture, it does not require long-term breeding of seafood. 2. It is necessary to keep the seafood in a narrow aquarium at a high density, to maintain the freshness of the seafood, and to suppress the metabolism as much as possible so as not to damage the appearance due to trauma or the like. 3. In order to use it for food, it is necessary not only to directly sterilize the fish and shellfish and not to cause toxicity in the fish and shellfish but also to prevent the taste and smell from being impaired. 4. The same aquarium will be reused for various types of seafood in a short period of time. Therefore, water temperature requirements are often changed. In addition, the water temperature and quality of seawater are updated each time.

Since there are the above-mentioned requirements for providing water for seafood suitable for live fish, in order to maintain and manage the water temperature and quality of the water used for appreciation and aquaculture, the target seafood is raised. Prepare a large amount of water that can be used for conditioning a relatively large amount of water compared to the amount of water used in a place (for example, a live fish tank) so that it can be circulated to the point of use at any time, and can be used at any time. Supplying water is required as a condition for providing water. Therefore, it can be said that the condition for adjusting the water suitable for live fish is not fixed but more fluid and easier to adjust and maintain than the conditions for watching and aquaculture. .
However, in the past, facilities that respond to such requirements have not been widely used for various types of seafood, and fluid habitation conditions are adjusted and maintained manually for large amounts of water. Came. For example, the manual work in the large-scale fish market is the salt concentration: dissolving salt with tap water. Water temperature: Add ice to seawater in summer. Dissolved oxygen: For example, oxygen is diffused into seawater by an oxygen cylinder.

[0006]

As described above, in live fish, the water for seafood is mostly adjusted by hand. Especially, the water temperature is changed depending on the seafood in the tank that changes frequently. Must. However, if a temperature control device is installed adjacent to each live fish tank as in the case of appreciation or aquaculture, it will be a huge facility and it will take a lot of time and effort to adjust the facility. An object of the present invention is to supply stable and hygienic seafood water to a live fish tank at an appropriate water temperature easily and quickly without using a large amount of seawater.

[0007]

The above objects can be achieved by the method and apparatus for supplying water for seafood of the present invention. That is, (1) a part of the circulation type water channel for seafood is branched to form a plurality of pipelines each having a heat exchanger, and the fishwater in the water temperature adjusting pipeline is heat-exchanged to a plurality of different water temperatures. While adjusting to the water for seafood, held in a circulating pipe, to adjust the water of the desired water temperature by appropriately mixing the water in the plurality of water temperature adjusting pipes at each water temperature at the point of use, A method for supplying water for seafood, characterized by maintaining. (2) A plurality of series of water temperature adjusting pipes equipped with at least a heat exchanger are provided in the circulation type pipe, and water is independently led from each water temperature adjusting pipe to a live fish tank of seafood. A water supply device for seafood, characterized in that the water is mixed in the live fish tank. (3) When adjusting the salt content of the seafood water in the circulation pipe, tap water or salt water is added to the water storage tank based on the measured value of the salt content measuring device provided in the water storage tank. Then, the water for seafood having a desired salt value set in advance is introduced into the live fish water tank through plural series of circulation type pipe lines equipped with a heat exchanger provided at the latter stage of the water storage tank. A method for supplying water for seafood, characterized in that the water is adjusted to maintain a predetermined salinity value and a desired water temperature by mixing inside.

(4) A salinity measuring device for measuring salt content of seafood water, a supply means for clean water, and a supplying means for saline solution are provided, and the measured value of the salinity measuring device and a preset target salinity value. And a water storage tank provided with a control means for adjusting the salt content of seafood water by selecting one of the clean water supply means or the salt water supply means, and a plurality of water temperature adjustments are provided at the subsequent stage of the water storage tank. A water supply device for seafood, characterized in that it is provided with a water supply pipe and is configured so that water is independently guided from each of the water temperature adjustment pipes to a live fish water tank of fish and mixed in the live fish water tank. (5) The effluent of the live fish tank in the circulation pipe is removed from at least turbidity, sterilized, and then introduced into a water tank equipped with a salt measuring instrument, which is based on the measured value of the salt measuring instrument provided. To the seawater with a desired salt value set in advance by adding clean water or salt water to the seawater, a plurality of series of water temperature control pipes equipped with a heat exchanger provided at the latter stage of the water tank. A method of supplying water for fish and shellfish, characterized by introducing the water to a tank of live fish, mixing in the tank of live fish to adjust to water having a predetermined salt value and a desired water temperature, and circulating and reusing as water for fish. (6) A water storage tank provided with a filtering device for removing at least turbidity and an ozone or ultraviolet ray sterilizer for treating the effluent of the live fish tank, and a water storage tank provided with a control means for adjusting the salt content of the treated water. A plurality of water temperature adjusting pipelines are provided in the latter part of the tank, and water is independently guided from each water temperature adjusting pipeline to the live fish tank of seafood and mixed in the live fish tank.
A water supply device for seafood, comprising means for reusing the treated water as water for seafood.

The technical idea of the present invention is as described above.
In order to provide suitable water for seafood at any point of use, we have created a device that adjusts and maintains fluid live fish conditions for various types of seafood that have been traditionally done by hand. Rather, it is necessary to prepare equipment that can prepare water that can be used for large-scale condition adjustment, to supply water to the point of use reasonably, and to establish a method that can maintain the conditions there and implement it.

Therefore, the main object of the present invention is to easily prepare water in the aquarium for adjusting the water temperature and quality when renewing the water in the aquarium for live fish. Mixing if necessary. A method and equipment for preparing water having different water temperatures prepared to have appropriate water quality will be specifically described below. However, the present invention is not limited to the following specific examples.

[0011] In the case of live fish, the water temperature is kept relatively low for the purpose of suppressing metabolism, but since the appropriate water temperature varies depending on the fish species, transportation method, etc., it is often set at 8 to 15 ° C. Therefore, two systems of water temperature control pipes, one of which has a temperature of 8 ° C (low temperature system) and the other of which has a temperature of 15 ° C (medium temperature system), are provided and maintained, and water is introduced from each of them, and each live fish tank is a use point. In, the opening of the valve may be adjusted. An important point in the present invention is that fresh water is newly poured into the live fish tank and the temperature control is completed at the same time.

[0012] Especially for seafood, when the newly introduced seawater or water for purification and reuse does not have a salt concentration suitable for live fish, it is necessary to consider the balance of various minerals from the characteristics of live fish. Instead, it may be adjusted with salt considering only the osmotic pressure. It may be adjusted with saline (about 0.33 kg / m ³ ) for easy handling. If you need to dilute, mix with clean water. This adjustment is performed by a salt measuring device and a control device provided in the water tank, but it may be manually adjusted by a person.

[0013] From the requirement of providing water to the live fish, regenerating and purifying seawater is mainly for removing and disinfecting suspended matters, and biological filtration such as BOD removal is a secondary one and may not be expected. In addition, ammonia-type nitrate-nitrogen, etc. may not be a problem in live fish for a short period of time. However, the oxidant generated by the reaction of nitrite nitrogen or bromine (Br) in seawater with O ₃ is extremely harmful, and thus it must be removed. If chlorine or the like is used for sterilizing and disinfecting seawater, it is toxic to seafood and causes discoloration and odor of chlorine, so it is preferable to use ultraviolet sterilization and / or ozone.

Since the water temperature is lowered in the live fish apparatus, the dissolution efficiency of oxygen is high, but oxygen-enriched air (O ₂ = about 90% or less is referred to as oxygen) is used for higher density live fish. It may be supplied by a PSA oxygen purifier using zeolite or the like. As a result, it is possible to eliminate the need for a large amount of oxygen cylinder, which is conventionally used and is dangerous in handling. In the present invention, it is preferable to circulate seawater such as seawater. At that time, the rotation rate is set to 12 times so that the water temperature of each water tank is maintained and the dirt in the water tank is quickly discharged.
It is desirable to set it to the day. In addition, since recycling is not performed by complete regeneration, it is necessary to replace it with water such as new seawater. The frequency will be changed depending on the season and the type and amount of live fish.

[0015]

EXAMPLES The present invention will now be described in detail with reference to Examples.
However, the present invention is not limited to this. (Example 1) A system in the case of recirculating seawater and providing live fish of two different temperature control systems with different water temperatures will be described in four processes for convenience. The four processes are shown in FIGS. 1 to 4, respectively, and the embodiment of the present invention will be described in more detail with reference to the drawings. The configuration of the entire system is shown in FIG. 5 for reference.

A. Seawater reclamation process In Fig. 1, overflow water from the live fish tank 1 with a total water volume of 60 m ³ existing in process D (see Fig. 4) and drainage of the used tank were made of concrete once installed in the basement of the first floor of 40 m ³ . It is stored in the water receiving tank 2. A scaler 2m ³ of protein skimmer 3 was installed in the water tank 2, and air was blown by the stirring blower 4 to excrete live fish.
Scrap the remaining food residue on the surface beforehand. Since the water receiving tank 2 is provided with a level switch, when the water level becomes higher than a certain level, the filtration pump 5 is automatically operated and the circulation filtration operation is started.

The two filtration pumps 5 are the live fish tank 1 (FIG. 4).
The volume was set to 30 m ² / H so as to circulate once in 2 hours, and water was sent to the filter 6. Two filter machines 6 are provided, which are cylindrical iron internal pressure tanks with a diameter of 1.0 m, filled with a filter medium to a height of 0.6 m, and water from the upper layer to the lower layer LV = 2.
Suspended substances in water as well as soluble organic matters are removed supplementarily while flowing at a speed of 0 m / H. The filter media used in the filter are silica sand with an average particle size of 0.6 mm for physical filtration and microbial carriers of around 1.2 mm for auxiliary biological filtration.
When water is passed through the filter, the function of sieving the pores formed by silica sand and the action of the microorganisms attached to the carrier simultaneously act on the nitrification of ammonia nitrogen in the water, and the nitrogen, phosphorus and organic matter components in the water due to the growth of microorganisms in the body. Effort removal action is performed. If filtration is continued for a long time, the filtration resistance increases and the water flow rate decreases. Therefore, each filter is stored in the 8 m ³ washing water tank 7 (see FIG. 2) provided in Process B once in about 5 days. The filter medium was washed with the tap water. The amount of washing water was 0.5 m ³ / min for 10 to 15 minutes, washing was carried out after receiving the live fish, and the washing drainage was discharged into the sewer. After the washing was completed, the filtration pump was operated again to fill the inside of the filter with seawater, and then the circulation was restarted.

After removing turbidity and soluble organic matter in the water with a filter, the ozone contact tank 8 oxidizes highly toxic nitrous acid into less toxic nitric acid to decolorize and deodorize and sterilize general bacteria. , Finish the water quality. Ozone supplied from the ozone generator 9 is 0 to the amount of circulating water.
The concentration of 1 mg / liter can be arbitrarily changed. When seawater is subjected to ozone treatment in the contact tank 8 for a residence time of about 2 minutes, bromine (Br) in the seawater reacts with ozone to generate an oxidant. Since the oxidant is extremely toxic to fish, the seawater discharged from the contact tank 8 is passed through an oxidant removal device (not shown) to completely remove residual oxidant to zero, and 5 m ³ of the process B shown in FIG. It was stored in a concrete water storage tank 10 provided in the basement on the first floor.

B. Seawater storage process for live fish A concrete water tank 10 is equipped with a level switch, and when the water level rises above a certain level, the pumping pump 11 automatically supplies seawater to the two water tanks 12 shown in FIG. I tried to send water. Further, the water storage tank 10 of the present embodiment is provided with a turbidity / pH / salinity concentration monitoring device (not shown), and the turbidity of seawater is 1 degree or more and pH = 7.
It was set so that an alarm would be issued when the salt concentration exceeded the range of 3 to 8.5 and the salt concentration of 15 to 25%.

Regarding the salt concentration in seawater, when the salt concentration falls below 15%, the salt was dissolved in city water from which residual chlorine was previously removed in a 1 m ³ polycarbonate adjusting tank 13. Reservoir 10 of artificial seawater by salt water pump
To adjust the salt concentration. When the salt concentration was high, city water from which residual chlorine was removed was directly sent to the water storage tank 10 to dilute the salt concentration. In addition, natural seawater for transportation that comes out when live fish is received was stored in the water storage tank 10 as much as possible. When the quality of the monitoring water was poor, the water was automatically returned to the water receiving tank 2 (Fig. 1) and re-passed to the seawater regeneration process A for regeneration treatment.

C. Live fish temperature control process Sea water whose water quality was confirmed in the 5 m ³ water storage tank 10 (Fig. 2) was used to pump 15 m ³ / H to the low temperature water supply tank 12 with 2 pumps 11 (Fig. 2), and the remaining 15 m ³ / H was sent to the medium temperature water supply tank 12. Water tank is 4m made of FRP with heat insulation material
Two water tanks of ³ were used. An air stone for blowing oxygen by the PSA oxygen generator 14 (FIG. 1) provided in the process A was provided in the water supply tank 12, and the dissolved oxygen concentration (DO) of seawater was adjusted to 6 mg / liter or more. The PSA oxygen generator 14 has an oxygen consumption of live fish of 200 ml / hour / kg-fish body weight, a dissolution efficiency of 10%, an oxygen blowing time of 12 hours, and a fish body weight of 3000 kg of 3.6 Nm.
³ / hour as 90% O ₂ was used.

The seawater whose DO level is adjusted in the water supply tank 12 is passed through the water supply pump 15 through the ultraviolet sterilizer 16 of the medium pressure mercury lamp system and the plate heat exchanger 17 made of titanium, and the seawater Sterilization of E. coli and adjustment of seawater temperature were performed. A circulation line is provided so that the seawater returns to the water supply tank 12 again when it is not used on the live fish tank 1 (FIG. 4) side. These two series of circulation lines use the cold water and hot water generated by the heat exchanger 17 and the air-cooling type heat pump chiller 18 so that one series (cold water temperature system) becomes 8 ° C and the other series (medium water temperature system) becomes 15 ° C. The seawater temperature was adjusted.

When the live fish tank side is not used, the water level of the water tank 12 rises, so the level switch provided in the water tank 12 controls the water tank 10 described in the process B.
The pumping pump 11 of FIG. 2 (for example, the low temperature pumping pump 11 in the case of a low temperature system) was stopped. When the level of the water storage tank 10 rises to the specified level, the filtration pump 5 (FIG. 1) is stopped, the ozone treatment is stopped, and the water reception tank 2 is stopped.
The seawater was overflowed at (Fig. 1). A monitoring device for measuring water temperature and dissolved oxygen (DO) was installed in the two circulation lines, and an alarm was issued when the set water temperature or dissolved oxygen deviated from the value of 6 mg / liter.

D. Live fish cage process As shown in FIG. 1, FIG. 3 and FIG. 4, piping is provided from each circulation line to the live fish aquarium 1, and each live fish aquarium 1 is supplied with two systems of seawater from the faucet. Seawater is mixed by adjusting the opening of the two faucets. The operator can know the optimum temperature by looking at the thermometer or by touching it, and does not have to touch an inadequate controller. Further, the electric control device causes a waterproof problem, but the method of the present invention causes no problem.

By the treatments in the above four processes, it was possible to always produce two series of seawater having the following water quality at 8 ° C and 15 ° C. pH 7.8 to 8.3 Ammonia _{NH 4 -N mg / l <0.1mg} / l nitrite _{NO 2 -N mg / l <0.1mg} / l nitrate _{NO 3 -N mg / l <50mg} / l Pollution Frequency <1 degree Permeability cm> 100 cm Chemical oxygen consumption COD mg / l <2 mg / l Dissolved oxygen mg / l> 6 mg / l Number of coliforms Not detected Salt concentration% 15-25% Seawater of these two series 4 is shown in FIG. 4 (shown as a 2-tank configuration in the figure) 0.2 to 2.0 m ³ per tank, total capacity 60
By sending water to the m ³ live fish tank 1 with a constant water pressure by the water supply pump 15 (FIG. 3) and adjusting the opening of the two faucets at the receiving port, the water temperature suitable for the live fish type of each cage, that is, the live fish tank 1. Could be adjusted.

[0026]

According to the present invention, the following effects can be obtained. 1. Water can be easily and quickly supplied to the aquarium with a water temperature and quality that is suitable for various types of live fish, etc., can respond to changes in seafood, and can secure a sufficiently stable water temperature and quality in the aquarium. . 2. Since there is no incidental facility for each aquarium, sufficient space for live fish can be secured. 3. It does not require any specialized knowledge for operation and can be used by business operators by making the best use of conventional intuition. 4. Energy can be effectively used because the water temperature is adjusted by heat exchange. 5. Since the PSA oxygen generator is used, no oxygen cylinder is used. Therefore, it is highly safe and can be easily used without being subject to the High Pressure Gas Control Law. 6. Since seawater is reused, effective use of water can be achieved. 7. Since the equipment can be automatically operated compared to conventional manual work,
Labor burden is reduced and labor saving can be achieved.

[Brief description of drawings]

FIG. 1 Process diagram A of the system of the present invention for regenerating water quality for live fish and shellfish utilizing wastewater from a live fish tank, etc.

FIG. 2 is a process B diagram of the system of the present invention for adjusting the water quality, particularly the salt concentration, for carrying out live fish and shellfish.

FIG. 3 is a middle C process diagram of the system of the present invention, which is provided with two temperature control systems and controls the temperature of water for live fish and shellfish.

FIG. 4 is a medium D process diagram of the system of the present invention for performing live fish and shellfish, which is provided with two systems of water supply systems having different water temperatures.

FIG. 5 is for block flow showing the overall configuration of the system of the present invention

[Explanation of symbols]

 1 Live fish tank 2 Water tank 3 Protein skimmer 4 Stirring blower 5 Filtration pump 6 Filtration machine 7 Washing water tank 8 Ozone contact tank 9 Ozone generator 10 Water tank 11 Pumping pump 12 Water tank 13 Adjusting tank 14 PSA oxygen generator 15 Water supply pump 16 UV Sterilizer 17 Heat Exchanger 18 Air-cooled Heat Pump Chiller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Iwaizumi 1-6-27 Konan Minato-ku, Tokyo Ebara in Filco Co., Ltd. (72) Inventor Yoshinori Asai 6-27 Konan, Minato-ku, Tokyo Within Infilco Corporation

Claims (6)

[Claims] 1. A plurality of circulation-type water temperature control conduits are branched to form a plurality of series of water temperature control conduits each equipped with a heat exchanger, and the seafood water in the water temperature control conduits is subjected to heat exchange to form a plurality of water temperature control conduits. While controlling the water for seafood with different water temperature, keep it in the circulation pipe, and mix the water in the water temperature control pipes at each water temperature at the point of use appropriately to adjust the water to the desired water temperature. , A method for supplying water for seafood, characterized by maintaining. 2. A circulating fish pipe is provided with a plurality of series of water temperature adjusting pipes having at least a heat exchanger, and water is independently supplied from each of the water temperature adjusting pipes. And a water supply device for seafood, characterized in that the water is introduced into the live fish tank and mixed in the live fish tank. 3. When adjusting the salt content of the water for fish and shellfish in the circulation type pipeline, tap water or salt water is stored in the storage type tank based on the measured value of the salt content measuring instrument provided in the water storage tank. Is added to make water for seafood with a desired salt value set in advance, and the water for seafood is led to a live fish tank through a plurality of series of water temperature adjusting pipes equipped with a heat exchanger provided at the latter stage of the water tank. A method for supplying water for seafood, which comprises mixing in a live fish tank to adjust and maintain water having a predetermined salt value and a desired water temperature. 4. A salinity measuring device for measuring salinity of seafood water, a supply means for clean water, and a supplying means for saline solution, and the measured value of the salinity measuring device and a preset target salinity value are provided. In comparison, a water tank provided with a control means for adjusting the salt content of the seafood water by selecting one of the above-mentioned clean water supply means or salt water supply means is provided, and a plurality of water temperature adjusting means are provided at the latter stage of the water storage tank. A water supply device for seafood, characterized in that the water supply device is provided with pipes, and water is independently introduced from each of the water temperature adjustment pipes to a live fish tank for fish and mixed in the live fish tank. 5. The effluent of the live fish tank in the circulation pipe is removed of at least turbidity, sterilized, and then introduced into a water tank equipped with a salinity measuring device. Plural series of water temperature control pipes provided with water or salt water in a water tank to prepare seafood water having a desired salt value set in advance, the seawater water being provided with a heat exchanger provided at a subsequent stage of the water tank. A method for supplying water for seafood, which comprises introducing the water through a path to a live fish tank, mixing in the live fish tank to adjust to water having a predetermined salt value and a desired water temperature, and circulating and reusing as water for fish. 6. A filter device for removing at least suspended matter,
An ozone or ultraviolet sterilizer is provided to treat the effluent of the live fish tank, and a water tank is provided with a control means for adjusting the salt content of the treated water, and a plurality of water temperature adjusting pipelines are provided at the subsequent stage of the water tank. Along with the water temperature control pipes, water is independently guided to a live fish tank for seafood, mixed in the live fish tank, and the treated water is reused as water for seafood. Water supply device.