JPH1084810A - Sterilization method for culturing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the trouble that a long time is required for sterilization and purification as ozone bubbles by the conventional air diffusion system and ejector system are large in size and stay for a stagnation short time in water is short and a contact area with the water is small. SOLUTION: The gaseous ozone from an ozone generator 2 is sent to an air-liquid mixing device 3 by which the gaseous ozone is mixed with the water and the mixture is stirred to form the fine ozone bubbles. The ozone bubbles are diffused in a fish preserve tank 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method of cultivating and sterilizing fish and shellfish.

[0002]

2. Description of the Related Art Conventionally, a diffuser system, an ejector system, and the like have been used for sterilization and purification of fish and shellfish in farming and culturing. That is, when disinfecting and purifying ozone gas by dissolving it in water, in the diffuser system and the ejector system, ozone bubbles of 2 to 3 mmφ are diffused or injected into water.

[0003]

As described above, the diameter of the ozone bubble by the diffuser system and the ejector system is 2 to 2.
Since it is as large as 3 mm, the residence time in water is short (large buoyancy) and the contact area with water is small (small surface area), so the efficiency of dissolving ozone gas in water is low, and it takes a long time. There was an inconvenience that sterilization and purification required a lot of energy.

The present invention has been made in view of the above circumstances, and provides a farming sterilization method capable of performing efficient sterilization and purification in a short time by reducing the diameter of ozone bubbles diffused and injected into water. The purpose is to do.

[0005]

According to the present invention, in order to achieve the above object, ozone gas from an ozone generator is sent to a gas-liquid mixing device, and mixed with water in the gas-liquid mixing device and stirred to form fine particles. Ozone bubbles are generated, and the ozone bubbles are diffused into the cultivation tank through a diffusion tube disposed at the bottom thereof, thereby sterilizing and purifying water in the cultivation tank.

[0006]

The ozone gas from the ozone generator sent to the gas-liquid mixing device mixes with water to form fine ozone bubbles and is diffused into the cultivation tank. Since the ozone bubbles are fine (the bubble sphere diameter is small), the residence time in water is long (small buoyancy) and the contact area with water is large (large surface area).
Therefore, the sterilization and purification are performed in a short time, and the activity and freshness holding ability of the fish and shellfish are improved.

[0007]

1 shows a plan view of an apparatus for carrying out the method of the present invention, and FIG. 2 shows a side view. In this apparatus, an ozone generator 2, a gas-liquid mixing device 3, and a compressor 4 are installed outside a cultivation tank 1. Then, the ozone gas generated from the ozone generator 2 is pressure-fed to the gas-liquid mixing device 3 by the compressor 4. The ozone gas pressure-fed to the gas-liquid mixing device 3 is mixed and agitated with water to form fine ozone bubbles, and is diffused through the gas-liquid water pipe 6 from the diffuser pipe 7 provided at the bottom of the cultivation tank 1. Reference numeral 5 denotes a simple filtration device for filtering various bacteria and organic products in water, 8 denotes a water level adjusting plate, 9 denotes a gantry, 10 denotes a water supply pipe into the cultivation tank 1, and 11 denotes a discharge pipe.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Fine ozone bubbles diffused from the gas-liquid mixing device 3 into the cultivation tank 1 will be described with reference to a specific example in comparison with a conventional example. (A) The size of a conventional ozone bubble is “2 to 3 mmφ”,
When the size of the ozone bubble of the present invention is “0.01 mmφ”, (b) When the surface area S and volume P of the conventional ozone bubble are calculated, S = 4πγ ² = 4 × 3.14 × (2-3) ² = 50.2
4 to 113.04 mm ² P = 4πγ ³ /3=4×3.14×(2 to ³ ) ³ /3=33.49 to 113.04 mm ³ (c) Surface area S and volume P of ozone bubbles of the present invention S = 4πγ ² = 4 × 3.14 × (0.01) ² = 0.0
^{1256mm 2 P = 4πγ 3 /3=4×3.14×(0.01)} 3/3 = 0.0000041mm 3 (d) the rate of increase in surface area, 50.24 ÷ 0.01256 = 4,000 times 113 , 04 ÷ 0.01256 = 9,000 times (e) One ozone bubble of 2 to 3 mmφ is 0.01 mmφ
When the volume of one ozone bubble is compared, N = 33.49 ÷ 0.0000041 = 8,000,000 in the case of 2 mmφ, N = 113.04 ÷ 0.0000041 = 27,000 in the case of 3 mmφ 2,000

As described above, when the ozone bubbles are diffused into the water by the gas-liquid mixing device 3 as described above,
As the surface area increases 4,000 to 9000 times and the contact area with water increases remarkably, the buoyancy is small due to fine bubbles, and the residence time in water is prolonged. Purification is possible.

[0010]

According to the method of the present invention, fine ozone bubbles are supplied and diffused in the cultivation tank, so that the residence time in water is prolonged, the contact area with water is increased, and the inside of the cultivation tank is increased. Sterilization and purification of water can be efficiently performed in a short time, and the activity and freshness holding ability of fish and shellfish can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an apparatus for performing the method of the present invention.

FIG. 2 is a side view of an apparatus for performing the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nutrition tank 2 Ozone generator 3 Gas-liquid mixing device 4 Compressor 5 Simple filtration device 6 Gas-liquid water supply pipe 7 Diffusion pipe 8 Water level adjustment plate 9 Stand 10 Water supply pipe in tank 11 Drain pipe

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 550 C02F 1/50 550C 1/78 1/78

Claims (1)

[Claims] 1. An ozone gas from an ozone generator is sent to a gas-liquid mixing device, where the ozone gas is mixed and stirred with water in the gas-liquid mixing device to generate fine ozone bubbles. A method of cultivating and sterilizing, comprising disinfecting and purifying water in a cultivation tub by diffusing it from an arranged diffusion tube.