KR101170304B1 - Polyculture system and method of fishes and marine polychaete - Google Patents

Abstract

PURPOSE: A complex culturing system for cultured fish and lugworm and a method therefor are provided to produce living creature like lugworm without the supply of separate feed sources. CONSTITUTION: A complex culturing system for cultured fish and lugworm comprises a fish breeding water tank(10), a lugworm culturing water bath(20), a seawater tank(38), and a larva collecting device. The fish breeding water tank is made of a material including concrete, FRP, or the like. The lugworm culturing water bath is used for culturing lugworm by being provided with seawater. The seawater tank supplies seawater to the fish breeding water tank and receives purified and exhausted seawater.

Description

Polyculture system and method of fishes and marine polychaete

The present invention relates to a complex culture system and method of farmed fish and tidal worms, and more particularly, to a complex culture system and method for farming worms using sewage containing fish excreta.

Flounder, one of the farmed species, is mainly produced by on-shore tank farming and offshore cage farming. Currently, the production amount is 50% of marine fish farming, but the price of live feed such as horse mackerel and mackerel is increased with the production of farmed flounder. With this rise, flounder farming profitability is deteriorating day by day.

Moreover, in the case of terrestrial tank farming, each municipality has established a water quality acceptance standard for wastewater that is discarded after being used as fish farming water. Although the water quality standards of effluents vary by municipality, they are strictly regulated in the range of 2 mg / L for organic matter and 3-5 mg / L for suspended solids.

Therefore, as fish farming has to be equipped with a purification facility to prevent pollution due to discharged water and to satisfy water quality standards of local governments, the profitability of farmed fish is further reduced.

On the other hand, the tidal worm is an annulus of the tidal worm family, mainly inhabiting the tidal flats and playing a major role in the purification of tidal flats, such as facilitating low-quality seawater communication and consuming organic matter. These lugworms are commonly used as fishing rods, and have been produced by natural harvesting so far, mainly scabbard worms (aka larvae, celadon or green larvae ) or rockworm worms ( Marphysa sanguinea , also known as bonworm or mixed mush). It was a subject.

Recently, as the fishing population has exploded in Japan as well as in Japan, the demand for worms has increased. However, indiscriminate harvesting has resulted in a significant decrease in the natural production (or resource) of domestic worms.

In general, the use of worms is limited to the bait of fishing, but species such as rock worms are used as food for sea cucumbers and aquaculture, and some species are used as raw materials for cosmetics.

Industrially used mudworms are mainly rock hairworm earthworms, dumb eyebrow earthworms, and eyebrow earthworm earthworms (aka houseworm earthworms or larvae). Among these, the fishing lure of many fishes is a rocky caterpillar. The adult is a large species that grows more than 30 cm and the expensive caterpillar, but as the production of natural rocky caterpillars does not meet the demand, two rock caterpillars, There have been attempts to cultivate brow eyebrows, but production is still scarce.

Therefore, relying on natural harvesting for the increasing demand of worms is a factor to further reduce the production of worms, which in turn leads to increased imports of worms.

The present invention has been invented to solve the above problems, by using and consuming aquaculture water containing feces generated in aquaculture in the wormworm farming by removing the organic matter of the aquaculture water discharged without additional purification facilities The objective of this invention is to provide a hybrid farming system and method for farming fish and worms that can produce high value-added organisms, such as rock worms, as well as enable breeding.

The present invention to achieve the above object, fish breeding tank for fish farming; A lugworm breeding tank used for farming a lugworm by receiving aquaculture seawater discharged from the fish breeding tank; It provides a mixed culture system of aquaculture fish and a worm earthworm, characterized in that it comprises a; a seawater tank for supplying the cultured seawater to the fish breeding tank and at the same time the cultured seawater purified and discharged from the worm breeding tank.

Preferably, the worm breeding tank is arranged at a lower height than the fish breeding tank is configured to facilitate the inflow of cultured seawater discharged from the fish breeding tank.

A first discharge pipe is installed in the upper part of the worm breeding tank for supplying the farmed seawater discharged from the fish breeding tank, and a plurality of branch pipes are connected to the first discharge pipe, so that the floating particles contained in the farmed seawater are bred for wormfish breeding. It is distributed evenly in the tank and flows in.

Preferably, one end of the first discharge pipe is disposed outside the lugworm breeding tank, and a valve is installed between the first discharge pipe and each branch pipe, so that the cultured seawater discharged from the fish breeding tank is externally provided through the first discharge pipe. To be discharged.

The substrate of the worm breeding tank is formed of a gravel layer and a mixed layer sequentially stacked from the bottom surface, the mixed layer is made of a mixture of masato, crushed oyster shell, ocher 3.5 to 5.5: 3.5 to 5.5: 1 It is characterized by.

Preferably, the substrate of the worm breeding tank is formed with a height of 30-50 cm from the bottom surface of the worm breeding tank.

In addition, the bottom surface of the worm breeding tank is provided with one or more second discharge pipe for discharging the farmed seawater, the second discharge pipe is formed with a plurality of seawater inlet hole for the inlet of the seawater and drained with a foreign material inlet prevention net on the surface It is characterized by consisting of pipes.

Preferably, a water intake pipe for collecting aquaculture seawater including a worm larvae is installed in the water layer of the worm breeding tank, and the larvae collection device is connected to the water intake pipe to collect worm larvae from the collected seawater.

The larvae collection device is a debris removal container for filtering the suspended matter larger than the worm larvae from the cultured seawater, a larvae collection container for filtering the worms larvae from the seawater discharged from the contaminant removal container, seawater discharged from the larvae collection container Filtration water discharge vessels to be discharged to the outside consists of a stacked structure in turn.

Also preferably, the second discharge pipe is configured to connect an overflow pipe for preventing seawater overflow of the worm breeding tank and an overflow pipe for adjusting the water level of the worm breeding tank and discharging seawater.

In another aspect, the present invention, characterized in that the farmed seawater discharged from the fish breeding tank for fish farming to enter the worm breeding tank to form a worm to clean the contaminated farmed seawater of the fish breeding tank while passing through the worm breeding tank It provides a combination of farmed fish and worms.

Preferably, the cultured seawater is characterized in that it can be supplied by circulation filtration, semi-circulation filtration and flowing water.

Also preferably, the cultured seawater flowing from the fish breeding tank into the tidal flat breeding tank and the cultured seawater flowing into the seawater tank from the tidal flat breeding tank are allowed to flow in an overflow manner.

In addition, by taking the cultured seawater of the worm breeding tank and collecting the worms larvae from the harvested seawater to enable the production of worms.

The cultured seawater uses ultraviolet sterilized and filtered seawater.

According to the present invention, it is possible to generate high incomes by simultaneously purifying water quality through the complex culture of cultured fish and tidal worms, and simultaneously producing expensive species such as fish and expensive tidal worms such as rock wool worms.

1 and 2 is a view showing a complex culture system of aquaculture fish and worm earthworm in accordance with an embodiment of the present invention
Figure 3 is a partially enlarged view showing a composite farming system of aquaculture fish and worms according to the present invention
4 is a view showing a larvae collecting device according to an embodiment of the present invention
5 is a diagram showing a complex culture system of swimming fish such as red snapper and worms
6 and 7 is an exemplary view showing a part of the complex culture system of farmed fish and worm earthquake implemented according to the present invention

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Hereinafter, the invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a complex culture system and method of aquaculture species and fish earthworms, including cultured seawater (contaminated seawater discharged to the outside of the fish breeding tank during the farming) By cultivating worms such as rock worms, it is possible to purify contaminated farmed seawater without a separate purification device and to produce worms without feeding.

In other words, organic matter and suspended solids are usually derived from fish excretion and leftover feed leftovers. Therefore, these materials are used as food for worms to form worms, and sand, soil, and gravel are needed to grow worms. Substrates can be used as a form of seawater filter to completely remove suspended solids contained in farmed seawater.

The complex culture system according to the present invention basically includes a facility for onshore fish farming, such as flounder, and a facility for farming of earthworms, such as rock worms, and the farmed seawater used for the complex farming is circular filtration, half It is discharged from the fish breeding tank while being supplied by circulation filtration or flowing water, and the discharged aquaculture seawater is introduced and introduced into the worm breeding tank.

Accordingly, in the mixed culture system of the present invention, fish excretion and feed dregs contained in the cultured seawater are consumed as food for the worms, and solid organic matter is removed, and various suspended substances in the cultured seawater are filtered while passing through the substrate of the worm breeding tank. It is composed of a system that is circulated back into the fish breeding tank.

Aquaculture water discharged from the fish breeding tank flows into the worm breeding tank at a constant flow rate, and the introduced fish farming effluent stays in the worm breeding tank for a certain period of time, thereby allowing nitrification of nitrogen compounds discharged from the fish breeding tank.

That is, since the cultured seawater is introduced at a constant flow rate at the top of the worm breeding tank, the nitrification bacteria propagate in the worm breeding tank to purify nitrogen compounds.

Thus, the present invention is able to produce the worms more economically without the supply of additional feed through the combined form of fish and worms, and can produce more worms more economically, and constitutes an eco-friendly system that does not require a separate purification facility or device for water purification can do.

More specifically, it is possible to configure a complex culture system of the form as shown in Figure 1, the fish breeding tank 10 for the breeding of aquaculture target species such as flounder made of a material such as concrete or FRP, the structure It can be formed as a hollow three-dimensional column having a bottom surface of a variety of forms, such as round, oval, or square.

The inside of the fish breeding tank 10 is a structure generally used, the bottom surface is formed to be inclined downward to the center portion and the drainage hole (not shown) is formed in the center of the bottom surface to facilitate the excretion of the fish or food waste Adopt a discharged structure.

The cultured seawater discharged from the fish breeding tank 10 is led to the lugworm breeding tank 20 to be directly introduced.

In order to discharge the aquaculture seawater of the fish breeding tank 10, a bottom surface of the fish breeding tank 10 is connected to the first discharge pipe 12 that can communicate with the drainage hole.

And, in order to facilitate the introduction of fish droppings or feed dregs contained in the cultured seawater into the worm breeding tank 20, the worm breeding tank 20 is preferably installed at a lower height than the fish breeding tank 10 Do.

Accordingly, the first discharge pipe 12 can be formed in a c-shaped structure as shown in FIG.

Or, as part of a method for properly maintaining the water level of the fish breeding tank (10) and the lugworm breeding tank (20), the cultured seawater and the lugworm introduced into the worm breeding tank (20) from the fish breeding tank (10) It is possible to configure a pipe so that the cultured seawater flowing into the seawater tank 38 from the breeding water tank 20 flows in an overflow manner.

That is, although not shown in the drawings, it is possible to install and configure the piping of the structure that the aquaculture seawater discharged from the fish breeding tank 10 flows by the overflow method and flows into the worm breeding tank 20, and also breeding worms The seawater discharged from the water tank 20 may also be configured to flow in an overflow manner and constitute a pipe having a structure flowing into the seawater tank 38 (see FIG. 2).

In addition, the first discharge pipe 12 is branched from the first discharge pipe 12 so that the floating particles (fish droppings or feed dregs, etc.) contained in the cultured seawater can be evenly introduced and distributed in the worm breeding tank 20. It is formed in a structure having a plurality of branch pipes 14 configured to be connected.

Each branch pipe 14 is formed to be spaced at intervals of 30-50 cm from each other in branching from the first discharge pipe 12 formed to extend along the worm breeding tank 20.

And, in the arrangement and installation so that the first discharge pipe 12 to be placed on the top of the worm breeding tank 20, the end of the first discharge pipe 12 (end portion not connected to the fish breeding tank) the worm breeding tank It is configured to be located outside the (20), so that the cultured seawater in the bath (antibiotic, formalin, etc.) of the cultured fish to be discharged to the outside so as not to enter the worm breeding tank 20.

To this end, the valve 16 is installed between the first discharge pipe 12 and each branch pipe 14 to selectively adjust the flow and inflow of the cultured seawater.

On the other hand, the lugworm breeding tank 20 may be inexpensive to form a bottom surface made of a material such as rubber plate or vinyl, and the remaining wall (or side) formed of a material such as a tent, a wooden board, such as rubber plate, vinyl. have.

The lugworm breeding tank 20 has a second discharge pipe of PVC material on the bottom surface (or gravel layer) as shown in Figure 2 in order to adopt a structure in which the introduced aquaculture seawater (seawater discharged from the fish breeding tank) falls down from the top ( 22) Install and configure.

The second discharge pipe 22 uses a drain pipe 22-1 having a plurality of seawater inflow holes 22a into which seawater can be introduced, so that the farmed seawater of the lugworm breeding tank 20 can be smoothly discharged. In order to prevent foreign substances from flowing into the seawater inlet hole 22a, the surface of the drain pipe 22-1 may be formed by closely covering a foreign matter inflow preventing network 22-2 such as an onion net.

The second discharge pipe 22 may be arranged in plurality in accordance with the floor area of the lugworm breeding tank 20.

In addition, the mudworm breeding tank 20 constitutes a substrate under conditions similar to, for example, a mudflat in order to create an ecological environment of the mudworm.

The substrate is filled with a gravel having a diameter of 2-3 cm to a height high enough to cover the second discharge pipe 22 from the bottom surface of the lugworm breeding tank 20 to facilitate drainage of cultured seawater (seawater of the worm breeding tank). (Gravel layer, A), on which a mixture of masato, crushed oyster shells, and loess is mixed in a ratio of 3.5 to 5.5: 3.5 to 5.5: 1, preferably 4.5: 4.5: 1, is laminated and filled (mixed layer, B ).

The height of the substrate is filled with a height of about 30-50 cm from the bottom surface of the worm breeding tank 20, and fill the cultured seawater with a height of about 10 to 20 cm thereon to form a water layer (C).

Further, as shown in FIG. 3, one end of the second discharge pipes 22 is provided with a straight connection pipe 24 to integrate and drain the cultured seawater respectively introduced into the second discharge pipe 22, and the connection pipe 24 ), An overflow pipe 26 having a U-shape connected at right angles is installed.

The overflow pipe 26 is adopted to an appropriate length in consideration of the water level of the worm breeding tank 20 for the movement and discharge of the cultured seawater overflowing upward from the connecting pipe 24. That is, the overflow pipe 26 is configured outside the mudworm breeding tank 20 to introduce the overflowed aquaculture seawater into the seawater tank 38 to adjust the level of the mudworm breeding tank 20.

In addition, an overflow pipe 25 is connected to an end of the second discharge pipe 22 to prevent the farmed seawater from overflowing in the worm breeding tank 20. The overflow pipe 25 is installed in a vertical shape in the worm breeding tank 20, the water level of the worm breeding tank 20 due to the cultured seawater is not smoothly discharged through the second discharge pipe 22, etc. As the predetermined height is exceeded, the introduced seawater is discharged through the overflow pipe 26 having a U-shaped structure.

The overflow pipe 26 is supplied to the fish breeding tank 10 and is connected to the seawater tank 38 in which the cultured seawater purified and discharged and recovered by the worm breeding tank 20 is stored and stored.

The seawater tank 38 pumps the seawater stored through the provided pump 40 to supply the fish breeding tank 10, and the seawater tank 38 and the fish breeding tank 10 are seawater inlet pipes. It is composed of 42 connections.

The sea water inlet pipe 42 is connected to the discharge pipe 44 for the external discharge of sea water on one side, the discharge pipe 44 is provided with a valve 45 for opening and closing of the pipe.

In addition, one side of the overflow pipe 26 is connected to the replenishment water inlet pipe 30 for the inlet of the replenishment water from the outside, the replenishment water inlet pipe 30 is also provided with a valve 27 for opening and closing of the pipe. do.

One side of the connection pipe 24 is connected to the drain pipe 28 having a valve 29, opening the drain pipe 28 through the valve 29 to discharge the cultured seawater discharged from the worm breeding tank 20 Should allow for external discharge.

As mentioned, the depth of the worm breeding tank 20 is in the range of 10 ~ 20cm.

Preferably, the worm breeding tank 20 is provided with an aeration device (not shown) to allow the appropriate dissolved oxygen (5 mg / L or more) to be introduced into the introduced aquaculture seawater.

As shown in Fig. 3, the worm breeding tank 20 collects larvae produced from the worms, in order to collect the seawater containing the worms larvae near the depth of 5 cm from the surface of the introduced cultured seawater (or the water layer) Intake pipe 32 is provided in the middle.

The intake pipe 32 is formed in a form in which a plurality of straight pipes are arranged in the form of standing up in the water layer and spaced apart from each other in order to take in the cultured seawater containing the worm larvae are connected from the bottom, the open of each pipe The upper end (collection port) is installed in the form of submerged in the water layer (C).

Intake pipe 32 is installed in the water layer (C) is disposed on the entire bottom surface of the lugworm breeding tank 20, spaced apart from each other at regular intervals.

The water intake pipe 32 is integrated discharged into the larval recovery pipe 34 connected to one side, and the larval recovery pipe 34 is provided with a valve 35 for opening and closing the pipe.

The larvae recovery pipe 34 extends to the outside and is connected to the larvae collecting device 50 for collecting worms larvae.

The larvae collecting device 50 is for facilitating the collection of worms larvae from the seawater taken from the worm breeding tank 20, as shown in Figure 4, the debris removal container 52, larvae collection container 54, filtered water discharge The container 56 is laminated | stacked one by one, and consists of an overlapping structure.

That is, the larvae collection container 54 is composed of a structure surrounding the contaminant removal container 52 from the outside, the filtration water discharge container 56 is composed of a structure surrounding the larvae collection container 54 from the outside.

The contaminant removal container 52, the larval collection container 54, the filtered water discharge container 56 may all be formed in a cylindrical shape of the open top, each of the containers (52, 54, 56) is easy to separate The distance between the inner surface of the vessel located at the outer side and the outer surface of the vessel located at the inner side may be applied with an average of 5 cm.

The contaminant removal container 52 has a plurality of perforations 53 formed on the outer circumferential surface except the bottom surface, and each of the through holes 53 has a larger floating material than the worm larvae contained in the farmed seawater, for example, zooplankton, and contaminants. The filter net (pore diameter 350-400 micrometers) which can filter this primarily is comprised.

The larvae collection container 54 is formed with a plurality of through holes 55 from 10 to 10 cm above the bottom surface to collect the larvae collected at the bottom, each of the holes 55 in the debris removal container 52 A filter network with a pore diameter of about 100 μm is attached to filter the larvae from the discharged seawater and discharge the seawater at the same time.

In addition, the larvae collection container 54 may form a through-hole 55 only on the half of the outer circumference in order to pour the collected worm larvae into a separate container and the like.

The filtered water discharge container 56 has a plurality of through holes 57 formed on the outer circumferential surface of the larvae collecting container 54 inserted into the inner periphery, so that the larvae of the larvae collecting container 54 are in the air. Avoid exposure.

By using the larvae collecting device 54, the primary filtration of zooplankton, contaminants, etc. contained in aquaculture seawater (or effluent) during the collection of larva larvae, the filtered seawater is introduced into the larvae collection container 54 Creatures smaller than larvae are discharged and only larvae are collected. Then, the sea water filtered in the larvae collection container 54 is discharged to the outside through the through-hole 57 of the filtered water discharge container 56.

In addition, when the larval collection device 50 is not used, it is preferable to cover each collection port of the intake pipe 32 to prevent the inflow of cultured seawater.

In such a complex culture system, the supply of aquaculture seawater can be carried out by recirculation, semicirculation and flow.

In the case of the circulating filtration system, the seawater stored in the seawater tank 38 is continuously used while circulating and filtering, so that a system such as a biofiltration tank (not shown) can be used to effectively decompose substances such as nitrogen and phosphoric acid. Additional facilities may be installed.

In the case of the semi-circulating filtration system, the cultivation system can be stably operated by exchanging seawater at regular intervals. However, in the semi-circulating filtration system, it is preferable to supply a certain amount of fresh water because salts of seawater increase due to evaporation of water.

If it is easy to secure the seawater, it can be operated by a flow-type system. In the case of a mixed-flow system, new seawater is continuously supplied.

The seawater supplied to the system of the present invention may use ultraviolet sterilization and filtered seawater, or may use untreated seawater.

For reference, as shown in Figure 5, unlike the case of flounder during the training of swimming fish such as red snapper, by forming a substrate (A, B) to cultivate worms in the bottom of the fish breeding tank 60 of the system It is possible to carry out a mixed culture of farmed fish and tidal worms in the space, so that a complex farming without separate site for installing a tidal worm breeding tank is possible.

However, when bathing the fish, it is necessary to form a space for accommodating only the fish by forming a hermetic bath tub 62 that can be sealed on one side of the fish breeding tank 60, and thus the bath tub 62 Since the lower part does not accommodate the worms, it is possible to prevent the death of the worms that can occur during bathing.

As described above, according to the complex culture system according to the present invention, solids such as fish droppings or feed dregs contained in the seawater discharged from the fish breeding tank 10 are introduced into the substrate layer such as sand, gravel, etc. As the worms are consumed as food, the worms are nurtured, and other suspended matter is filtered while passing through the substrate layer of the worm breeding tank 20, and the nitrogen content of the fish droppings is propagated in the seawater flowing into the substrate, which is the habitat of the worms. It is purified by a nitrifying bacteria. The seawater purified and recovered through this process may be supplied and used in a circulation filtration or a semicirculation filtration fed back to the fish breeding tank.

Therefore, the present invention not only enables the generation of surplus income by farming sea worms with polluted seawater discharged while farming fish, but also enables eco-friendly farming by purifying polluted seawater.

Hereinafter, the present invention will be described in detail with reference to the following examples, but the scope of the present invention is not limited to these examples.

Example 1 Implementation of a System for Combination of Fish (Flounder) and Lumberworms (Rockworm Earthworms)

In order to implement a complex culture system of fish and the earthworm in the laboratory, first, a two-stage wooden frame was manufactured as shown in FIG. At the top of the timber frame (two floors), a fish breeding tank was placed, and at the bottom (first floor), a lugworm breeding tank was installed.

The flounder fry was purchased and introduced into the fish breeding tank, and the fish breeding tank used a low-thickness and a large area for the flat flounder.

Specifically, the fish breeding tank adopts a plastic tank having a size of 40 cm, 70 cm, and 30 cm in height. The upper part of the tank was covered with a net to prevent the flounder from jumping off.

Another pipe was connected to the PVC pipe installed at the top of the timber frame to make branches and valves so that 3 liters of seawater per minute flowed into the fish tank. The incoming seawater was configured to be introduced from the top of the fish breeding tank, and the seawater discharged after the flounder was installed on the other side where the PVC pipe was installed in the fish farm, and the overflow was performed.

In addition, the fish breeding tank was installed at an inclined angle of 15 ° so that the fish dung or feed dregs were easily discharged, and the flounder put in the fish breeding tank was about 10 cm in length and about 30 g in weight of about 10 g. .

The configuration of the multimodal system described in Embodiment 1 of the present invention refers to the configuration of FIGS. 6 and 7, but does not have the same structure as that of FIGS. 6 and 7.

The lugworm breeding tank adopts a plastic channel having a size of 40 cm in width, 50 cm in length, and 40 cm in height. As a substrate for wormworm rearing, gravel (1-2 cm in diameter) is placed on the bottom, about 5 cm high, and Masato (0.1-0.3 cm in diameter), shredded oyster shell, and loess are 4.5: 4.5: 1 each. The mixed mixture was laminated, and the depth of the substrate was about 30 cm.

The lugworm breeding tank is installed in the bottom of the tank by covering a mesh of 0.1 cm in diameter with a plurality of perforated PVC pipes so that the introduced seawater is discharged from the fish breeding tank in an overflow manner and discharged from the bottom of the litter breeding tank. The seawater flowing into the pipe was drilled in the tank and drained to the outside to connect to the outside of the tank. At this time, the pipe connected to the outside was formed at a certain height by using the elbow connection pipe to maintain the water level of the seawater in the worm breeding tank.

In addition, to prevent overflow of seawater in the worm breeding tank, the pipes are built to a certain height using a tee connection pipe to the drain pipe at the bottom so that they can overflow.

The seawater discharged from the fish breeding tank was introduced into the tidal worm breeding tank at a flow rate of 2-4 liters per minute, and the seawater discharged from each worm breeding tank was integrated into one drain pipe to be introduced into the seawater tank.

Feeding was quantitatively supplied once a day in the cultivation of flounder and rock worms in the combined culture system, which was operated by a semi-circulation filtration system that exchanged 50% of seawater every week. At this time, the newly supplied seawater was UV sterilized and filtered using a 0.1 μm pore size cartridge filter, and the water temperature of the seawater was maintained at 18-20 ° C.

As a result of the combined culture for 20 days, the flounder showed 100% survival rate without the mortality and doubled from 10g to 20g. As the representative water quality, ammonia was measured and showed a value of 0.03 mg / L or less, and the turbidity was maintained at 0.04 NTU or less.

In other words, it was confirmed that the stable water quality could be maintained by supplying the seawater in which fish were bred to the worm-raising tank, and also operated as a semi-circulating filtration system to return 50% of seawater every 7 days. It was confirmed that the composite culture system and method of the present invention is very stable, such as 0%.

As described above, the flounder showed normal growth as a result of combining the fish and the worms with the system and method according to the present invention. This was the result of the rehabilitation of the farmed seawater periodically, but the stability of the seawater was maintained as the sea worms were bred through the breeding tank. By keeping the water quality stable, the flounder showed normal growth without mortality.

The growth of rockworm earthworms was not confirmed, but no dead and injured individuals were found.

Thus, the present invention can provide an eco-friendly system in which fish excretion or feed dregs discharged during farming are consumed while worms are consumed, organic matter is removed in terms of water quality, and suspended solids are removed by the substrate of the worm breeding tank. have.

From the standpoint of aquaculture farmers, the production of high value-added rock worms at the same time in the production of a single fish such as over-floundered halibut enables more stable profits and management. In this difficult situation, larvae can be produced through the breeding of rockworm earthworms, so it is possible to create a separate income source.

The mixed farming system and method of land fish and tidal worms are also applied to marine caged fish and shellfish mixed farming to remove the excretion or food waste of aquaculture organisms and improve the quality by stocking worms at the bottom of cages or shellfish-positive land. In addition, the resources of the worms can also be usefully used in environmentally friendly farming.

10,60: Fish breeding tank
12: first discharge pipe
14: branch pipe
16,27,29,35,45: valve
20: lugworm breeding tank
22: second discharge pipe
22-1: drainage pipe
22-2: Foreign substance inflow prevention network
24: connecting pipe
26: overflow pipe
28: drain pipe
30: Supplementary water inflow pipe
32: intake pipe
34: larvae recovery pipe
36: cap
38: seawater tank
40: pump
42: seawater inflow pipe
44: discharge pipe
50; Larvae collecting device
52: debris container
54: larval collection container
56: filtered water discharge container
62: bath tub

Claims (15)

Fish breeding tanks for fish farming;
A lugworm breeding tank used for farming a lugworm by receiving aquaculture seawater discharged from the fish breeding tank;
A seawater tank which supplies the farmed seawater to the fish breeding tank and at the same time the farmed seawater purified and discharged from the wormworm breeding tank is introduced;
And,
A water intake pipe for collecting aquaculture seawater including a worm larvae is installed in the water layer of the worm breeding tank, and a larvae collecting device is connected to the intake pipe to collect worm larvae from the collected seawater. A debris removal container for filtering suspended matter larger than the worm larvae from the cultured seawater, a larvae collection container for filtering the worms larvae from the seawater discharged from the debris removal container, and a discharged seawater discharged from the larvae collection container to the outside Combined culture system of aquaculture fish and worm earthworm, characterized in that the filtered water discharge container is stacked in sequence.
The method according to claim 1,
Wherein the worm breeding tank is arranged at a lower height than the fish breeding tank is a complex culture system of aquaculture fish and worm earthworm, characterized in that to facilitate the introduction of aquaculture sea water discharged from the fish breeding tank.
The method according to claim 1,
A first discharge pipe is installed in the upper part of the worm breeding tank for supplying the farmed seawater discharged from the fish breeding tank, and a plurality of branch pipes are connected to the first discharge pipe, so that the floating particles contained in the farmed seawater are bred for wormfish breeding. It is distributed evenly in the tank and a mixed culture system of aquaculture fish and tidal worms, characterized in that the inflow.
The method according to claim 3,
One end of the first discharge pipe is disposed outside the lugworm breeding tank, and a valve is installed between the first discharge pipe and each branch pipe to discharge the farmed seawater discharged from the fish breeding tank to the outside through the first discharge pipe. A composite farming system for farmed fish and worms, characterized in that it is possible to.
The method according to claim 1,
The substrate of the worm breeding tank is formed of a gravel layer and a mixed layer sequentially stacked from the bottom surface, the mixed layer is made of a mixture of masato, crushed oyster shell, ocher 3.5 to 5.5: 3.5 to 5.5: 1 A composite farming system of aquaculture fish and worms, characterized in that.
The method according to claim 1 or 5,
The substrate of the worm breeding tank is a mixed culture system of aquaculture fish and worm earthworm, characterized in that formed in a height of 30 ~ 50 cm from the bottom surface of the worm breeding tank.
The method according to claim 1,
The bottom surface of the worm breeding tank is installed with at least one second discharge pipe for discharging the farmed seawater, the second discharge pipe is formed with a plurality of seawater inlet holes for the inflow of seawater and the drain pipe with a foreign material inlet prevention net on the surface Complex culture system of farmed fish and worm earthworm, characterized in that consisting of.
delete delete The method of claim 7,
The second discharge pipe has an overflow pipe for preventing sea water overflow of the worm breeding tank, and an overflow pipe for adjusting the water level of the worm breeding tank and draining the seawater.
delete delete delete delete delete

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