KR20070036408A - Venturi system and nursery system - Google Patents

Abstract

The present invention relates to an onshore water tank breeding system, and more particularly, to an organic material inside a breeding tank, including an injector having a bypass pipe provided with a valve in a venturi system, and injecting a mixed water bubble into a breeding tank water. It is related to the land tank breeding system that prevents the deterioration of water quality even without changing the breeding water by supplying the oxygen and supplying the oxygen and does not deposit the waste on the breeding tank bottom.

Air lift, venturi, filter net, injector, foam separator

Description

Venturi System and Land Tank Growth System {VENTURI SYSTEM AND NURSERY SYSTEM}

1 is a side view of a land tank food development system according to a preferred embodiment of the present invention.

2 is a plan view of FIG.

3 is a schematic diagram of the diaphragm and injector of FIG. 1.

4 is a simplified diagram of the airlift of FIG.

5 is a cross-sectional view of the venturi system of FIG.

** Description of symbols for the main parts of the drawing **

100: breeding tank 210: injector

220: Venturi outflow pipe 310: diaphragm

320: support 400: air lift

410: air hose 420: ejection pipe

430: Air Stone 500: foam separator

510: foam separation inlet pipe 520: foam separation inlet pipe

530: submersible motor 540: filter network

600: Venturi system 620: Venturi inlet pipe

631: Venturi pipe 632: air inlet pipe

633: bypass pipe 634: valve

610: Pump

The present invention relates to an onshore water tank breeding system, and more particularly, to an organic material inside a breeding tank, including an injector having a bypass pipe provided with a valve in a venturi system, and injecting a mixed water bubble into a breeding tank water. It is related to the land tank breeding system that prevents the deterioration of water quality even without changing the breeding water by supplying the oxygen and supplying the oxygen and does not deposit the waste on the breeding tank bottom.

Shrimp farming is growing year by year due to its high value-added and short breeding period, and it is becoming a major aquaculture industry on the west coast, which produces 3,000 tons per year from about 500 festival farms. Each year, more than 50% of farms suffer severe economic damage due to mass mortality and reduced productivity.

The current shrimp farming method is to raise seedlings (10-12 crops) that have not undergone cultivation directly into the farm, and the mortality rate of the first month is 20% due to the increase in stress of larvae with low environmental stress. It acts as a disease-causing factor of high water temperature, increasing the likelihood of mass mortality, and also as a major factor in productivity loss due to reduced survival rate. In order to improve the initial survival rate, it is desirable to enter the farm at the postlarvae stage of 0.5 ~ 1.0g body weight after a certain period of time (about 1 month) in the indoor tank, but the description is not established.

Some private nursery nurseries and farms have attempted to raise shrimp larvae before stocking in a variety of ways, similar to the existing larval rearing method, that is, aeration in tanks to manage and nurture breeding stocks. As it grows, problems with poor breeding water quality, low survival rate of less than 50%, and growth slowdown are currently rarely undertaken.

The present invention has been made in order to solve the above-mentioned problems, and includes an injector having a bypass tube provided with a valve in the venturi system, and injecting the mixed water bubbles in the breeding tank water, the organic matter inside the breeding tank The purpose is to provide a land tank breeding system that prevents deterioration of water quality even without exchanging breeding water by supplying oxygen and supplying oxygen, and does not deposit waste on the bottom of the breeding tank.

In order to achieve the above object, the land water tank breeding system of the present invention includes a breeding tank, an inlet pipe, a pump for transferring the breeding water of the breeding tank to the inlet pipe, a venturi tube connected to the inlet pipe, and the venturi tube. An air inlet tube formed to communicate with the outlet, an outlet tube for transferring water passing through the venturi tube, and a bypass tube branched to the inlet tube to bypass the water of the inlet tube to the outlet tube. Venturi system is made to include, and the inlet pipe is connected to the outflow pipe to inject a breeding water containing bubbles,

The bypass pipe is provided with a valve, the injector is disposed in the breeding tank is characterized in that for spraying in the breeding tank water.

According to this configuration, by maximizing the activity of the taga nutrient bacterial flora, it is possible to prevent the removal of wastes accumulated in the breeding water exchange conditions and the deterioration of water quality.

The inlet pipe is provided with a filtering network, it is possible to prevent the breeding organisms inside the breeding tank is sucked into the Venturi system.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

For reference, among the configurations of the present invention to be described below, the same configuration as the prior art will be referred to the above-described prior art, and a detailed description thereof will be omitted.

In the following embodiments of the present invention will be described taking the shrimp farmed in the land tank breeding system as an example, but the present invention is not limited to this, it will be revealed in advance that a variety of fish and shellfish can be cultured.

1 is a side view of the land tank tank growth system according to a preferred embodiment of the present invention, Figure 2 is a plan view of FIG. 3 is a schematic diagram of the diaphragm and injector of FIG. 1, and FIG. 4 is a schematic of the airlift of FIG. 1. 5 is a cross-sectional view of the venturi system of FIG. 1.

As shown in Figures 1 to 4, the land tank breeding system of the present embodiment is large, breeding tank 100, venturi inlet pipe 620, the venturi inlet pipe 620 to the breeding tank 100 A pump 610 for transferring a breeding water of the venturi tube 631 connected to the venturi inlet tube 620, an air inlet tube 632 formed to communicate with the venturi tube 631, and the venturi tube ( Venturi inlet pipe 220 for transferring the water passed through 631 and the branch formed in the venturi inlet pipe 620, bypass the water in the venturi inlet pipe 620 to the venturi outlet pipe 220. A venturi system 600 including a bypass pipe 633, a valve 634 installed at the bypass pipe 633, and a breeding water containing bubbles connected to the venturi outlet pipe 220. It comprises an injector 210 for injection.

Breeding tank 100 is a tank filled with breeding water, it is preferable to have a rectangular shape for smooth circulation of the breeding water.

For example, breeding tank (100) horizontal to vertical ratio of 1: 2 to 1: 5, the height can be more than 1m.

In addition, the material of the breeding tank 100 is concrete or HDPE (high density polyethylene) is suitable.

It is preferable to install a diaphragm 310 having a length of about 2/3 of the length of the breeding tank 100 along the inner center of the breeding tank 100 in order to uniformly float the organic matter and smoothly flow the breeding water.

As shown in FIG. 2, the material of the diaphragm 310 is made of PVC plate, vinyl, or concrete, and when formed of a material of PVC plate or vinyl, the support 320 for fixing horizontally above and below the diaphragm 310 is shown. It is preferable to attach.

Venturi system 600 is a device that includes bubbles in the breeding water in the breeding tank (100).

The venturi system 600 includes a venturi inlet pipe 620, a pump 610 for transferring water to the venturi inlet pipe 620, a venturi pipe 631 connected to the venturi inlet pipe 620, and the venturi. It is formed branched to the air inlet pipe 632 formed in communication with the tube 631, the Venturi outlet pipe 210 for transferring the water passing through the Venturi tube 631, and the Venturi inlet pipe 620, And a bypass pipe 633 for bypassing the water of the venturi inlet pipe 620 to the venturi outlet pipe 210, and a valve 634 provided in the bypass pipe 633.

As a result, the breeding water passing through the venturi tube 631 is mixed with the air introduced into the venturi tube 631 through the air inlet tube 632 while forming a fine bubble.

In addition, the bypass pipe 633 is provided as described above, the breeding water flowing into the Venturi inlet pipe 620 is divided into the Venturi tube 631 and the bypass tube 633 is transferred.

Therefore, as the flow rate is adjusted by the valve 634 installed in the bypass pipe 633, the amount of breeding water bypassed from the venturi inlet pipe 620 to the bypass pipe 633 is adjusted, so that the venturi pipe 631 is adjusted. It is possible to change the flow rate of breeding water passing through. That is, it is possible to adjust the amount of air mixed in the breeding water.

As such, by controlling the amount of bubbles mixed in the breeding water can be uniformly and strongly sprayed from all the injectors 220 connected to the bottom of the tank.

In addition, by providing the bypass pipe 633, it is possible to finely control the water pressure, and uniform and strong air injection can be performed regardless of the change of seasons or the surrounding environment.

Venturi inlet pipe 620 is disposed in the water of the breeding tank 100 and the filter net is installed at the end thereof, it is possible to prevent the breeding organisms inside the breeding tank 100 is sucked.

On the other hand, in order to prevent deterioration of the water quality in the breeding tank 100, wastes of feed and excreta of the breeding organisms (prawns) should not be deposited on the bottom and corners of the breeding tank 100 and always by crushing all possible particles as small as possible. It should be floating in the water.

The injector 210 is disposed at the bottom of the breeding tank 100, and is connected to the venturi outlet pipe 210 to spray the breeding water mixed with the bubbles to the breeding tank 100.

The injector 210 is formed on both sides of the venturi outflow pipe 210 is disposed in the center of the bottom of the breeding tank 100 so that the mixed breeding water can be injected to both sides.

In this embodiment, the venturi outlet pipe 210 is disposed at the bottom of the breeding tank 100 along the diaphragm 310 to be at the bottom thereof.

The injector 220 serves to float the organic matter in the breeding water by spraying the breeding water and the micro-bubbles toward the opposite sides of the breeding tank 100, and supplies oxygen to the breeding water.

In addition, the injector 220, it is preferable to use a tube of 1/2 to 1/3 of the diameter of the venturi outlet pipe 210 for the strong injection.

The breeding water introduced through the pump 610 is mixed with bubbles while passing through the Venturi tube 631, and the mixed breeding water is transferred to the breeding tank 100 through the Venturi outlet pipe 210, It is injected through the injector 220 connected to the venturi outlet pipe (210).

As a result, all wastes in the breeding tank 100 are finely pulverized to keep them always floating in the breeding water middle layer, and sufficient oxygen supply for the activity of other nutrients (nitriding bacteria) for the decomposition of waste particles is provided. maintain.

Further, in order to reduce the burden on the decomposition of the organic matter of the bacteria it is preferable to further remove the fine particles by installing a foam separator 500.

The foam separator includes an underwater motor 530 for sucking breeding water, a foam inlet pipe 510 for transferring breeding water sucked from the underwater motor 530 to the foam separator 500, and removing fine organic particles. A foam separator 500 and a foam outflow pipe 520 that sends the filtered breeding water to the breeding water tank 100.

In addition, the foam separation device is provided with a venturi system as described above may be to mix the bubbles in the breeding water in the filtration process.

Furthermore, in order to prevent the breeding organisms from being sucked into the foam separator, a filter network 540 of a suitable size is installed around the underwater motor 530.

Since the operation principle of the foam separation apparatus is presented in Korean Patent Laid-Open Publication No. 2003-0023794, it will be referred to and detailed operation principle will be omitted.

In addition, by installing an air lift 400 as shown in Figure 4 to the flow of breeding water It is desirable to increase the oxygen concentration at the same time as the organic matter is always floated by keeping it gentle.

The air lift 400 is connected to an air device (not shown) for supplying air, a cylindrical blowoff pipe 420 having a cut in the longitudinal direction, and the air device and the air hose 410 to bubble air. And an air stone 430 disposed in the lower portion of the blower pipe 420.

In addition, the air lift 400 is disposed to be inclined between the breeding tank 100 and the diaphragm 310, respectively, three are arranged on the left and right sides of the diaphragm 310. At this time, the air lift 400 disposed on the left and right sides of the diaphragm 310 is disposed so that the cutout is directed in the opposite direction so that the breeding water can be circulated in the clockwise or counterclockwise direction about the diaphragm 310. .

On the other hand, the air device comprises an air supply unit for supplying air and a transport pipe for transporting the supplied air, this transport pipe may be supported by the blow-out pipe 420 is arranged inclined.

Thus, bubbles generated through the air stone 430 disposed close to the bottom of the breeding tank 100 are raised by buoyancy by themselves, and the water inside the breeding tank 100 is also aerated and raised at the same time. Here, the jet pipe 420 serves to guide the direction of the water.

The number and arrangement of the air lift 400 may be determined according to the size of the breeding tank 100 and the speed of the water flow may be adjusted by adjusting the angle of the jet pipe 420.

Hereinafter, the shrimp farming experiment and experimental results using the above-ground tank culture system of the present embodiment having the above-described configuration will be described.

Experiment 1 was carried out as follows to grow the initial seedlings of the shrimp at high density without changing the breeding stock.

The above ground water tank breeding system is W3m x L6m x H1m (18m2) concrete rectangular breeding tank 100, pump 610, submersible motor 530, venturi system 600, injector 220, air lift 400, The central diaphragm 310, and foam separator 500 is included.

The central diaphragm 310 was installed in concrete, and the air lift 400 installed three * 2 tanks in an 18m2 water tank and maintained the angle at 15 to 30 °.

In the Venturi system 600, the pump 610 was set to 0.5HP and the Venturi tube was 50 mm in diameter, and the injector 220 was 16 mm in diameter.

Here, breeding water is filtered and sterilized (20 ppm of chlorokalki) to inoculate and incubate diatoms (Chaetoceros, etc.) so that seedlings are stocked at a time when the diatoms are sufficiently grown.

Seedlings hold white shrimp seedlings (B.W. 0.1g) at a density of 8,500 (773 birds / m3).

On the other hand, as the water quality of the breeding water progresses from the self-nourishing state to the other nutrient state, the carbon source (molasses) is appropriately supplied as necessary when the ammonia concentration is increased, and the concentration of dissolved oxygen, pH, and nutrients is checked.

In addition, the feed is adjusted to the amount of feed FCR 1.0 ~ 2.0 to feed four times / day.

The water temperature is heated to around 25 ℃ using a boiler.

As a result of the experiment with the same method and apparatus, as shown in Table 1, as a result of breeding shrimp seedlings for 50 days without changing the breeding water, the ammonia concentration was 0.059 ppm or less and the nitrite concentration was maintained at 0.924 ppm or less. Breeding water quality did not deteriorate and remained adequate for the growth of shrimp. Other water quality factors were water temperature 20.8 ~ 28.5 ℃ (average 25.1 ℃), salinity 30.4 ~ 32.8ppt (average 31.5ppt), DO 4.3 ~ 8.3ppm (average 6.1ppm), pH 7.2 ~ 8.5 (average 7.9).

Shrimp seedling growth rate and survival rate were 50 days, and the survival rate was 99.7%, almost no mortality, and FCR (feed conversion efficiency) was very good at 1.03. The body weight was 2.2 g and the gross weight was 18.6 kg (unit weight 1.69 kg / m 3).

As an experiment different from the above, the second intermediate cultivation experiment 2 in the high-density intermediate growth tank (RW system type 1) was performed.

Experiment 2 was carried out for 20 days under the same conditions as Experiment 1 and stocked with 454 rats weighing 2.3 grams in order to medium-yield the rearing of medium-sized shrimps without dense exchange.

As a result of the experiment 2, as shown in Table 2, the positive results of 20 days without changing the breeding water, ammonia and nitrite were 0.04ppm, 0.1ppm or less, respectively, to maintain the water quality suitable for shrimp growth. Other water quality factors were maintained at water temperature of 25.0 ~ 28.4 ℃ (average 27.5 ℃), DO of 4.8 ~ 5.8ppm (5.1ppm), and pH 7.3 ~ 8.1 (average 7.6).

After 20 days of breeding, the weekly growth rate was 0.67g / week, shrimp body weight was 4.2g, unit weight was 1.87kg / m3, and FCR was 2.88. Survival rate was 98.4% with almost no mortality.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications or variations of the present invention without departing from the spirit and scope of the invention described in the claims below Can be carried out.

According to the above ground water tank breeding system of the present invention as described above, the following effects.

The venturi system is provided with a bypass pipe, and the valve is installed in the bypass pipe, so that fine adjustment of the water pressure is possible, and thus uniform and strong air injection is possible through the injector regardless of the change of seasons or the surrounding environment.

The inlet pipe is provided with a filtering network, it is possible to prevent the breeding organisms inside the breeding tank to be sucked into the venturi system.

In addition, an injector disposed inside the breeding tank, including an injector for injecting mixed breeding water into the breeding tank water, by floating organic matter in the breeding water and supplying oxygen to the breeding water, thereby eliminating waste products without changing the breeding water. It can prevent water deterioration by removing it, and can block the influx of external pathogens to prevent viral diseases of the breeding organisms. Therefore, aquaculture productivity can be greatly improved.

 In addition, the breeding of shrimp seedlings in the land tank tank breeding system has a ripple effect in the following fields.

First, by mass-producing mid-growing seedlings and stocking them in aquaculture farms, not only can they shorten the period of cultivation in open-air farms, but they can significantly reduce disease occurrence by shortening the stress period and exposure to disease sources, thereby improving productivity. .

Second, the possibility of viral infection during early seedling period can be greatly reduced by not changing the breeding stock at all during the breeding period in the indoor tank where virus transmission is blocked.

Third, the cost of the facility is much less than that of the conventional filtration technology, and higher productivity can be obtained.

Fourth, by early breeding of early-growing seedlings produced 1-2 months earlier than the season, they can be stocked in the farms for short shipments.

Claims (3)

Inlet pipe; A pump for transferring water to the inlet pipe; A venturi tube connected to the inlet tube; An air inlet pipe formed to communicate with the venturi pipe; An outlet pipe for transporting water passing through the venturi pipe; A bypass pipe branched to the inflow pipe and configured to bypass the water in the inflow pipe to the outflow pipe; Venturi system comprising a valve provided in the bypass pipe. The method of claim 1, Venturi system, characterized in that the inlet pipe is installed with a filtering network. Breeding tanks; An inlet pipe, a pump for transferring the breeding water of the breeding tank to the inlet pipe, a venturi pipe connected to the inlet pipe, an air inlet pipe formed to communicate with the venturi pipe, and the water passing through the venturi pipe A venturi system branched to the inlet pipe, the bypass pipe configured to bypass the water in the inlet pipe to the outlet pipe; It is made to include an injector connected to the outflow pipe for spraying breeding water containing bubbles, A valve is installed in the bypass pipe, and the injector is disposed inside the breeding tank to spray the breeding tank water.

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