JPH01265837A - Raising device of aquatic animal - Google Patents

Abstract

PURPOSE:To extremely reduce filtration load of a main filter tank, to miniaturize the filter tank, to prolong intervals of back washing and to prevent deterioration in water qualities of breeding water in the title facilities to circulate and to filtrate breeding water between a breeding water tank and a filter tank, by equipping a specific auxiliary filter tank at the upper steam side of the filter tank. CONSTITUTION:A main body 31 of a tank is divided into three chambers of a first, a second and a third three chambers 36a, 36b and 36c by two sheets of longitudinal partition walls 34 and 35 in the left and right direction, a nozzle 43 of a foam generating device 4 is set at the bottom of the second chamber 36b and further an auxiliary filter tank 3 which has a filter medium 39 at the top is equipped with a foam introducing passageway 37 to send foams blended with suspension occurring on the water surface to the outside of the main body 31 of a tank, passes breeding water from a breeding water inlet 32 through communicat ing holes 34a and 35a to the first chamber 36a the third chamber 36c and discharges the breeding water from a breeding water outlet 33 is constituted. Then the auxiliary filter tank 3 is equipped at the upper stream side of the filter tank 2 between the breeding water tank 1 of the title device and the filter tank 2, a proper amount of the breeding water W is optionally supplied from an elevated water tank 19 to the auxiliary tank, O3 is added from an O3 generator 6 to the breeding water overflown from an top opening 11a and the breeding water is circulated and filtered between the auxiliary filter tank 3, the filter tank 2 and the breeding water tank 1.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to breeding equipment used in aquariums and the like for breeding aquatic animals such as fish and shellfish, and more specifically, the present invention relates to breeding equipment for breeding aquatic animals such as fish and shellfish used in aquariums and the like, and more specifically, the present invention relates to breeding equipment for breeding aquatic animals such as fish and shellfish used in aquariums. This relates to an aquatic animal breeding facility that is used by circulating filtration between the tank and the tank.

(Background of the invention and prior art) In aquariums and other land-based aquatic animal breeding facilities, fish and shellfish are bred at extremely high density in breeding tanks, and breeding water is circulated between the breeding tanks and filter tanks. It is customary to use the battery continuously for a long period of time without replacing it. When rearing fish and shellfish by continuously using rearing water in this way, it is a major issue to prevent the quality of the rearing water from deteriorating due to fish excrement, leftover food, etc.

The main causes of water quality deterioration caused by continuous use of rearing water are as follows.

First of all, fine P=%g organic matter becomes mixed into the rearing water due to the excrement and leftover food of the fish and shellfish. This may pose a problem in aquariums where fish are kept for the purpose of ornamentation (J transparency may be reduced).

Second, organic matter (nitrogen compounds) contained in the excrement and leftover feed of fish and shellfish is decomposed by bacteria in the rearing water and becomes ammonia. This ammonia is toxic to fish and shellfish. It is very strong and can cause respiratory problems in seafood, especially in alkaline waters such as seawater, even at very low concentrations.

Thirdly, if ammonia is dissolved in the rearing water as in Part 2, the ammonia is oxidized by nitrifying bacteria in the rearing water and converted to salt salts, making the rearing water acidic.

Fourth, when the excrement in the breeding water is decomposed by bacteria, a large amount of oxygen is required for the oxidative decomposition effect, and the dissolved oxygen concentration in the breeding water decreases.

When the dissolved oxygen concentration in breeding water decreases, it not only inhibits the growth of fish and shellfish, but also removes harmful ammonia by oxidation, that is, the nitrification effect of ammonia by nitrifying bacteria decreases, and the concentration of ammonia decreases. I can no longer speak U.

By the way, the four problems mentioned above are caused by fine suspended matter such as fish excrement and leftover food floating in the breeding water for a long time. In order to remove fine suspended matter such as excrement and leftover feed, a filtration method called a circulation filtration method is used.

The circulating filtration methods conventionally used in aquariums include the slow filtration method (gravity filtration method) not shown in Figure 4, or the rapid filtration method (pressure filtration method) as shown in Figure 5. method).

In the conventional aquatic animal rearing equipment that adopts the slow filtration method shown in FIG.
2, and in the filtration tank 102, fine suspended matter such as suspended organic matter is deposited on the surface of the filter medium (for example, sand bed) 171.
Filter it and pump the filtered breeding water W +10
The water is then refluxed through the guide pipe 112 into the rearing tank IO1. A sedimentation tank is provided between the rearing tank +01 and the filter tank 102, and the overflowing rearing water from the upper part of the rearing tank +01 is temporarily stored in the settling tank to remove residual food and solid excrement in the water. It is also practiced to precipitate and separate large suspended solids and then supply them to the filtration tank +02 side. However, the filtration tank 10 of the slow filtration method shown in FIG.
2, since the rearing water passes through the filter medium 139 due to its gravity, the filtration speed is slow, about several meters/hour, and as the number of fish and shellfish to rear increases, the filter tank If it is necessary to increase the filtration capacity of the filtration tank 102, there is no other way but to increase the filtration area of the filtration tank +02, and therefore there is a problem in that a large space is required to install the filtration tank 102. In addition, even if the filter tank 102 employs the slow filtration method, it is filtered periodically (on average, once every 1 to 2 months, depending on the number of fish and shellfish being raised or the size of the filter tank). It is necessary to backwash the filter medium 139 to discharge the suspended matter adhering to the filter medium 139 to the outside. For example, during backwashing, the water W stored in the water storage tank 109 is sent by the pump +13 through the guide pipe 114 to the culture water outlet side in the filtration tank +02, and the suspended matter that has settled in the a shrine 139 is removed. The suspended matter is suspended in water and discharged to the outside through a drain pipe 108 along with the water.

In addition, in the aquatic animal rearing equipment that adopts the rapid filtration method shown in FIG. Pump 210 for water mixed with suspended matter
Since the filtration tank 202 is forced into the closed type filtration tank 202, the filtration speed is fast (the filtration speed is
m/hour"-), which has the advantage that the filtration tank 202 can be made small; however, the filtration bed 239
However, there was a problem in that the pipes became clogged in a short period of time, and four backwashes had to be carried out in a relatively short period of time (about once every 1 to 2 days). Incidentally, the same applies to the gravity filtration method shown in FIG. 4, but during backwashing, the filtration function of the filtration tank is stopped and a large amount of water for backwashing is required.

(Object of the Invention) In view of the above-mentioned problems with the filtration system in conventional aquatic animal breeding equipment, the present invention reduces the burden on the main filtration tank, reduces the size of the filtration tank, and The purpose of this project was to propose an aquatic animal rearing facility that can lengthen the backwash interval.

(Means for Achieving the Object) The present invention provides an aquatic animal breeding facility in which breeding water for breeding aquatic animals such as fish and shellfish is circulated and filtered between a breeding aquarium and a filter tank. A nozzle of a bubble generator is provided at the bottom of a tank body having a culture water inlet and a culture water outlet on the upstream side of the surface filter tank in the water circulation flow path, and a filter material is attached to one side of the nozzle in the tank body. It is characterized by the installation of an auxiliary filtration tank which accommodates the foam and is further provided with a foam outlet passage for guiding the foam mixed with suspended matter generated on the water surface in the face tank main body to the outside of the tank main body.

(Function) According to the aquatic animal breeding equipment of the present invention, since the auxiliary filtration tank is installed on the 1st stream side of the breeding water flow path of the main filtration tank,
Before the suspended matter such as fish and shellfish excrement and leftover feed generated in the rearing tank reaches the main filtration tank, the suspended matter is filtered in advance in the auxiliary filtration tank, and the main filtration tank The filtration burden will be significantly reduced. In addition, the auxiliary filtration tank has a nozzle of a bubble generator installed at the bottom of the tank body (and the filter medium is housed above the nozzle in the tank body, so air bubbles generated from the nozzle do not adhere to the filter medium. The suspended matter that is in the tank is separated, and the separated suspended matter is floated to one side by air bubbles, and the suspended matter that has floated to the top of the water in the tank body is further removed. Since the bubbles can be automatically discharged from the tank body through the bubble outlet passage, suspended solids that adhere to the filter media in the auxiliary filtration tank can be automatically removed while the breeding water is being circulated and filtered throughout the breeding equipment. become able to do so.

(Embodiment) To explain the embodiment of the present invention shown in FIGS. 1 to 3, FIG. 1 shows the overall configuration of an aquatic animal breeding facility such as an aquarium according to this embodiment.

The breeding equipment shown in FIG. 1 pumps seawater from the sea A into a water storage tank 9 using a pump 15, and then pumps seawater W in the water storage tank 9 using a pump 18 into an elevated water tank I9 for storage. However, the breeding water stored in the elevated water tank 19 can be supplied to the breeding water tank 1 in an appropriate amount as necessary.

The breeding water W in the breeding aquarium 1 overflows into the opening +1a at one end of the guide tube II which is open in two parts in the breeding aquarium I, passes through the guide tube 11, and enters the auxiliary filtration tank 3. After being guided and primarily filtered in the auxiliary filtration tank 3,
It is sent through the guide pipe 20 into the main filtration tank 2, and after being filtered again in the filtration tank 2, it is returned to the rearing tank 1 by the pump IO, and the sea urchins are sequentially and continuously circulated and filtered. It looks like this. The auxiliary filtration tank 3 is installed at a lower position than the rearing tank 1, and overflowing rearing water naturally falls from the second part of the rearing tank 1 into the two-end opening IIa of the guide tube 11 and is auxiliary. It is made to flow into the filter tank 3.

In FIG. 1, reference numeral 5 is a balannonk tank for preventing the water level in the rearing tank l from rising above a predetermined height, and reference numeral 6 is an ozone generator for generating ozone (03). The ozone-mixed air generated by the ozone generator 6 is injected into the guide pipe 11 connecting the rearing tank l and the auxiliary filtration tank 3 through the air pipe 6I, and
The ozone component is dissolved in the breeding aquarium l inside the tank. By dissolving the ozone component in the rearing water in this way, it is possible to promote the foaming effect when the ozone-containing rearing water passes through the auxiliary filtration tank 3, as will be described later.

As shown in FIGS. 2 and 3, the auxiliary filtration tank 3 is divided into three chambers 36a, 36b, first to third, in the left-right direction by two vertical partition walls 34 and 35 inside the tank main body 31.

The second room (center room) is divided into 36c.
Install the nozzle 43 of the bubble generator 4 at the bottom of 36b J-
, and further the nozzle 43 located in the second chamber 361).
A filter medium 39 is accommodated in one side of the second chamber 36.
An oil outlet passage 37 for discharging foam mixed with suspended substances to the outside, which will be described later, is installed in the second part of b.

The first chamber (left chamber) 36a and the second chamber 36b in the tank body 31 communicate with each other through a communication port 34a provided at the top of the vertical partition wall 34 that partitions the compartment, and the second chamber 36a
b and the third chamber (right side chamber) 36c are communicated through a communication port 35a provided at the lower part of the vertical partition wall 35 that partitions the compartment. Further, a rearing water container 1] 32 is opened at the bottom of the first chamber 36a, and a rearing water outlet 33 is opened at two parts of the right side chamber 36c. The breeding water inlet 32 contains breeding water W that overflows from a part of the breeding tank L.
The lower end of the guide tube 21 for guiding the breeding water W from the auxiliary filtration tank 3 side to the main filtration tank 2 side is connected to the rearing water outlet 33. is connected. Therefore, in this auxiliary filtration tank 3, the breeding water \I is sequentially supplied from the breeding water container 1'' 32 to the 1st chamber 36a and the communication Cl.
34 a, second chamber 36b, filter medium 3 in the second chamber 36b
9. It is designed to flow to the rearing water outlet 1 33 side through the communication [X] 35a and the third chamber 3Qc.

Breeding water W mixed with air (ozone) is supplied from the culture water inlet 32 into the first chamber 36a, and the air dissolved in excess in the first chamber 36a is separated. Air is discharged into the atmosphere from an air discharge port 38 provided in the second part of the first chamber 36a.

The second part of the second chamber 361) is closed by a dome-shaped lid plate 36d.

The bubble generator 4 is configured by connecting an air pump 41 and a nozzle 43 with an air pipe 42.
The pressurized air from 1 is discharged into the second chamber 36t from a nozzle 43 provided at the bottom of the second chamber 36b. Note that the nozzle 43 (J) is formed with a large number of small holes 43a, 43a, etc. as shown in FIG.
... is released into the central chamber 36b in the form of many small bubbles.

The filter housed in a part of the second chamber 361)
In this embodiment, reference numeral 39 uses a mesh bag in which a large number of small suspension absorbent materials made of synthetic resin and having a large number of concave and convex portions formed on the surface to increase the surface area is housed. The filter medium 39 is filled in the second chamber 361) to a considerable depth (for example, in the range of 1.2 to 2/3 of the total depth) from the water surface.

In this auxiliary filtration tank 3, from the breeding water inlet 32 to the tank main body 31.
The rearing water W supplied inside the second chamber 3 is fed from the communication port 34a to the second chamber 3.
The water flows through the filter medium 39 in 6b from top to bottom, and at that time, suspended matter mixed in the breeding water adheres to the surface of the filter medium 39 and is removed from the breeding water. Further, when the bubble generator 4 is operated, a large number of small bubbles are emitted from its nozzle 43, and the suspended matter adhering to the surface of the a-grill 39 is agitated by the small bubbles and peeled off. Furthermore, when a large number of small bubbles are discharged from the nozzle 43, the suspended matter separated from the filter medium 39 is lifted up by the buoyancy of the bubbles, and the ozone dissolved in the breeding water W by the ozone generator 6 is The ingredients promoted the formation of bubbles on the water surface, which caused the bubbles to rise to the water surface! l! ! The i-objects become trapped and accumulate on the water surface in the form of bubbles mixed with harmful substances. In addition, the bubbles mixed with suspended matter that occur on the water surface are 1
- It is concentrated and accumulated on the lower surface side of the mu-shaped lid plate 36d.

Note that the bubble generator 4 may be operated at predetermined time intervals by a timer, and the breeding water W is continuously circulated even while the bubble generator 4 is in operation.

The oil outlet passage 37 provided in the upper part of the second chamber 36b of the auxiliary filtration tank 3 has a bubble inlet 37a that opens upward at a position slightly above the water surface in the tank body 31. It is led from 37a to the outside of the tank body 31 through the duct 1-37b. The bubble inlet 37a has a dome-shaped lid plate 36d.
They are placed directly under the , separated by an appropriate distance. Then, when a large amount of foam B mixed with turbidity accumulates on the water surface in the second chamber 361, since the second part of the second chamber 36b is closed with the dome-shaped lid plate 36d, ” The foam B mixed with the two-part suspension is sequentially passed through the foam inlet 37a of the foam outlet passage 37.
From there, it flows into the duct 3 and υ1 is automatically discharged to the outside. In addition, it is preferable to drip an antifoaming agent onto the foam mixed with suspended matter discharged outside the tank to eliminate the foam, and then discharge it to a sewer or the like. In this way, the auxiliary filtration tank 3 has a self-cleaning effect due to the bubble generator 4 and the oil outlet passage 37, and the moss shed 39 will not become clogged over a long period of time.

The breeding water filtered by the auxiliary filtration tank 3 is passed through the guide pipe 20
The water is sent to the main filtration tank 2 through the main filtration tank 2, is filtered again in the main filtration tank 2, and is returned to the rearing tank 1 from the outlet L1 of the main filtration tank 2 by the pump 10. In this embodiment, the main filtration tank 2 is of a gravity filtration type.

In this way, since breeding water that has been filtered in advance in the auxiliary filtration tank 3 is sent to the main filtration tank 2, the main filtration tank 2
The scale (area) of the main filtration tank 2 is reduced.
This makes it possible to reduce the amount of suspended matter in the filter medium (for example, filter sand) 39 and reduce the amount of suspended matter in the main filter tank 2.
This makes it possible to significantly extend the backwash interval. In addition, in this sea urchin, suspended matter (fine leftover food and excrement) in the rearing water W is transferred to the outside with bubbles relatively early after generation.
By discharging I, the suspended matter (organic nitrogen compounds) in the rearing water W can be treated before it is decomposed into ammonia by bacteria, etc., and deterioration of the quality of the rearing water W can be prevented. Become. In addition, backwashing to the main filtration tank 2 is performed by supplying the water W stored in the water storage tank 9 into the tank body 21 of the filtration tank 2 from the rearing water outlet 23 side through the guide pipe 14 by the pump 13. This is done by suspending the suspended matter adhering to the water mt, I'29 and discharging the water mixed with the suspended matter to the outside through the drain pipe 8.

(Effects of the Invention) The aquatic animal breeding equipment of the present invention has the auxiliary filtration tank 3 installed on the upstream side of the breeding water flow path of the main filtration tank 2.
The filtration burden on the main filtration tank 2 can be reduced significantly, thereby making it possible to downsize the main filtration tank 2 and lengthen the backwash interval of the main filtration tank 2. Further, the auxiliary filtration tank 3 is provided with a nozzle 43 of a bubble generator 4 at the bottom of the tank body 31, and the air bubbles released from the nozzle 43 cause the filter medium 39 to
The suspended solids adhering to the filter medium 39 are separated from the filter medium 39, and the suspended solids separated from the filter medium 39 are captured by bubbles and suspended on the water surface of the tank body 31, and further suspended on the water surface -L. Since the bubbles mixed with suspended matter can be discharged to the outside through the oil discharge passage 37, there is a self-cleaning effect even during filtration operation, and the filter medium 39 in the auxiliary filtration tank 3 can be clogged over a long period of time. This has the effect of making maintenance management easier. Furthermore, even if taste turbidity (organic nitrogen compounds) such as minute leftover feed or excrement of fish and shellfish occurs in the rearing water W, the suspended matter will be mixed with the suspended matter before it is decomposed and turned into ammonia. This also has the effect of preventing deterioration of the water quality of the rearing water W, since the bubbles can be removed from the outside.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a schematic diagram of an aquatic animal breeding facility according to an embodiment of the present invention, FIG. Figure 3 shows III-I in Figure 2.
N cross-sectional view, FIG. 4, and FIG. 5 are schematic diagrams of conventional aquatic animal breeding equipment, respectively. 1... Breeding tank 2... Main filtration tank 3... Auxiliary filtration tank 4... Air bubble generator 31... Tank body 32... Breeding water inlet 33... Breeding water outlet 37... Oil derivation passage 39... Filter medium 43... Nozzle

Claims (1)

[Claims] 1. Aquatic animal breeding equipment in which breeding water (W) for breeding aquatic animals such as fish and shellfish is circulated and filtered between a breeding tank (1) and a filtration tank (2). A tank body (3) having a rearing water inlet (32) and a rearing water outlet (33) on the upstream side of the filtration tank (2) in the water circulation flow path.
1) A nozzle (43) of a bubble generator (4) is provided at the bottom of the tank body (31), and the nozzle (43) in the tank body (31) is
), a filter medium (39) is accommodated above the tank body (3
1) Remove bubbles mixed with suspended substances generated on the water surface in the tank body (
31) Aquatic animal breeding equipment characterized by being equipped with an auxiliary filtration tank (3) provided with a bubble outlet passageway (37) for guiding the bubbles to the outside.