JPH03180131A - Device for rearing - Google Patents

Abstract

PURPOSE:To maintain a microorganic concentration in a rearing water tank at a low value and reduce onset of diseases by providing a construction for mixing part of ozonized water with water treated with active carbon in a process for taking in water for rearing, filtering the obtained water, ozonizing the filtrate water, then treating the ozonized water with the active carbon and feeding the resultant water to the rearing water tank. CONSTITUTION:Rearing water is taken in with an intake pump 3, filtered through a filter 1, passed through a filtrate water storage tank 2 and fed to an ozonization device 7 with a purifying pump 4 to carry out ozonization treatment. The ozonized water is then fed to an active carbon device 8 to perform active carbon treatment. Part of the ozonized water is simultaneously branched with a branch valve 10, mixed with water treated with the active carbon and fed to a rearing water tank 5 with a feed pump 9 to rear fishes. Thereby, even if microorganisms thickly grown in the active carbon in the active carbon device 8 are peeled and mixed in the water treated with the active carbon, part of the ozonized water is mixed with the water treated with the active carbon. As a result, contaminant microorganisms are sterilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to breeding equipment, particularly to purification and disinfection of breeding water used in cultivation and fishing.

[Conventional technology] Securing fishery resources is an important issue for our country. As one of the measures for this purpose, the production of seedlings for artificially hatching fish eggs and releasing them into the river is becoming popular.

Figure 2 shows, for example, the conventional technology for seedling production and fish farming described in "Aquaculture and Water Volume 2: From Effective Water Utilization Technology to Coastal Environment Improvement" (written by Kazuo Sano, published by Scientist). It is a block diagram showing the flow of a rearing device by. In the figure, (1) is the filtration device, (2) is the filtered water storage tank, (3) is the water intake pump, (4) is the filtered water supply pump, (5) is the breeding tank, and (6) is the outlet. . Seawater, river water, and other water for breeding are taken in by a water intake pump (3), filtered by a filtration device (1), and then transferred to a filtered water storage tank (2).
). The operation of the water intake pump (3) is controlled by the water level of the filtered water storage tank (2). Filtered water storage tank (
The water in 2) is supplied to the breeding tank (5) by the filtered water supply pump (4) as needed, and at the same time, the same amount of breeding water in the breeding tank (5) is discharged from the outlet (6). . The amount of water supplied, the timing and amount of water released are determined from the rearing tank (5).
The level of contamination of the breeding water inside can be determined by measuring water quality using water quality analysis or a water quality sensor (not shown).

In addition, if the water area from which the water is taken is contaminated with microorganisms, disinfection using ultraviolet light, chlorine-based disinfectants, or ozone may be performed before introducing the water into the breeding water.

[Problems to be Solved by the Invention] Since the conventional breeding apparatus was configured as described above, it had the following problems, and stable production was often not possible. That is, in the absence of disinfection methods, disease outbreaks often occurred and there was always a risk that production would be reduced to zero. However, the above-mentioned ultraviolet sterilization has problems in terms of stability due to problems with lamp life, dirt on the lamp surface, and ultraviolet transmittance. In addition, disinfection with chlorine-based chemicals has residual toxicity, so there is a limit to the amount of disinfection that can be administered, and it has not been sufficiently effective, especially for raising targets with low resistance, such as larvae. Furthermore, ozone treatment has the same problem as chlorine because it produces harmful residual products when the target is seawater. In any case, in the prior art, the breeding water in the breeding aquarium was not sufficiently disinfected, and there was always a risk of disease infection of the fish.

This invention was made to solve the above-mentioned problems, and it ensures stable production by ensuring water purification and sterilization and preventing excessive disinfectant from flowing into the aquarium. The aim is to provide a breeding device that can.

[Means for Solving the Problems] A breeding device according to the present invention includes a filtration device that takes water for breeding and filters it, a purification device that processes the filtered water with ozone and then treats the ozonated water with activated carbon, and a breeding device that takes water for breeding and filters it. A main flow path in which the breeding water flows through the filtration device, the purification device, and the breeding aquarium in this order, and a part of the ozone-treated water is branched, and the main flow path flows through the water tank without passing through the activated carbon device. It is equipped with a flow path that connects with the channel.

[Function] In the rearing apparatus of the present invention, the taken filtered water is first subjected to ozone treatment, where it reacts with dissolved components to remove contaminant components and disinfect.

When the water used is seawater, the bromine ions contained in the seawater react with ozone to produce residual oxidizing products. It has a disinfectant effect and is toxic to fish and other animals. This ozonated water is then treated with activated carbon to remove residual toxic substances, including ozone, as well as pollutants, before being introduced into the aquarium. Activated carbon-treated water may be contaminated with microorganisms that have grown on the activated carbon, and in order to remove this, in addition to the purification flow described above,
A portion of the ozonated water is mixed with activated carbon treated water. Activated carbon treated water has improved water quality and can be disinfected by adding a small amount of disinfectant.

[Example] Hereinafter, a breeding apparatus according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the flow of a breeding apparatus according to an embodiment of the present invention. In the figure, (1) is a filtration device, (
2) is a filtered water storage tank, (3) is a water intake pump, (4) is a purification pump, (5) is a breeding tank, (6) is an outlet, (7)
is an ozone treatment device, (8) is an activated carbon device, (9) is a supply pump, and (10) is a branch valve.

The filtrate in the filtrate storage tank (2) is sent to the ozone treatment device (7) by the purification pump (4), where it is ozone treated. The ozonated water is distributed into the main flow path that is introduced into the activated carbon device (8) via the branch valve (10) and the flow path that bypasses it and is introduced into the suction side of the supply pump (9) at its outlet. be done. The ozonated water distributed to the activated carbon device (8) is there removed from residual oxidizing products and other contaminant components. The circulating water that has bypassed the activated carbon device (8) contains residual oxidizing products, which have a disinfecting effect, so by mixing them with the activated carbon treated water, the filtered water volume is disinfected and the feed pump (9) Breeding tank (5)
will be introduced in Naturally, before this, a predetermined amount of water in the tank must be discharged from the outlet (6). The above branching amount is determined by the concentration of residual ozone and/or oxidizing products in the ozonated water, and is set so that the total concentration of these in the mixed water is below the toxicity limit. The above process continues during the period when water is supplied to the aquarium.

By using the treatment flow as described above, microorganisms flowing out from the activated carbon-treated water can be disinfected by adding residual oxidizing products to the extent that they do not cause problems for breeding subjects.

[Effects of the Invention] As described above, according to the present invention, the rearing device includes a filtration device,
A main channel comprising a purification device that ozone-treats filtered water and then treats the ozonated water with activated carbon, and a breeding aquarium, through which the breeding water flows in the order of the filtration device, the purification device, and the breeding aquarium; Since a part of the ozone-treated water is branched and connected to the main flow path without passing through the activated carbon device, the microorganism concentration in the aquarium can be maintained at a low level and disease outbreaks can be prevented. In addition to being able to reduce the probability of this, there is an effect that fish and the like can be kept stably without excessive disinfectant flowing into the breeding tank.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a breeding apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional breeding apparatus. In the figure, (1) is a filtration device, (5) is a breeding tank, (
lO〉 is a branch valve. In addition, in the figures, the same symbols indicate the same or corresponding parts.

Claims (1)

[Claims] It consists of a filtration device that takes in and filters breeding water, a purification device that ozone-treats the filtered water, and then treats the ozonated water with activated carbon, and a breeding aquarium, and the breeding water is supplied to the filtration device, the purification device, and a main channel that flows in the order of the breeding aquarium, and a part of the ozone-treated water is branched,
A breeding device comprising a channel that connects with the main channel without passing through the activated carbon device.