A dual-circulation system for artificial breeding of groupers

Abstract

This invention application belongs to the technical field of artificial breeding of groupers, and specifically discloses a double-circulation system for artificial breeding of groupers, which includes a plurality of breeding tanks, an A circulation system, and a B circulation system. Both the A circulation system and the B circulation system are connected to the plurality of breeding tanks through water inlet pipes and drain pipes. This system is mainly used for grouper breeding and solves the problem of low survival rate of grouper breeding in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of artificial breeding of groupers, and specifically discloses a double - circulation system for artificial breeding of groupers. Background Art

[0002] As the most precious economic fish in seawater aquaculture, groupers have advantages such as few diseases and fast growth, and are the most ideal choice for the seawater aquaculture industry to develop high - value technologies for marine organisms. Especially during the current optimization and adjustment of the aquaculture industry, many farmers hope to switch to raising high - quality fish such as groupers.

[0003] Currently, in the grouper seedling - raising industry, there are mainly two modes of seedling - raising technologies: indoor cement - pond seedling - raising and pond seedling - raising. Each has its own advantages and disadvantages. The problems mainly focus on the low success rate and survival rate of seedling - raising, and more diseases during the seedling - raising process, resulting in a significant decrease in the overall seedling emergence rate. Summary of the Invention

[0004] The purpose of the present invention is to provide a double - circulation system for artificial breeding of groupers to solve the problem of reduced survival rate of grouper seedlings.

[0005] To achieve the above - mentioned purpose, the technical solution of the present invention is: a double - circulation system for artificial breeding of groupers, including a plurality of breeding tanks, an A - circulation system, and a B - circulation system. The A - circulation system and the B - circulation system are both connected to the plurality of breeding tanks through water inlet pipes and drain pipes, and a valve is connected to the drain pipe.

[0006] The working principle and beneficial effects of this technical solution are as follows:

[0007] (1) The growth of grouper larvae and juveniles has high requirements for water quality and is very demanding on the nutrition of bait organisms. Moreover, there is a process of bait conversion during the seedling - raising process, that is, the transition stage from feeding on rotifers to copepods. Rotifers and copepods are mostly cultivated outside the system and then artificially added to the seedling - raising system. System A mainly solves the problem of the bait of unconsumed rotifers in the seedling - raising water body, ensuring that the nutrition of rotifers in the fry water body can meet the needs of the fry.

[0008] (2) The main function of system B is to treat the nutrients in the water through a conventional RAS system to achieve the purpose of stabilizing the water body.

[0009] Furthermore, system A includes an artificial light source and a first biological filter tank, a first calcium ion reactor, a circulation pump, an algae - cultivating column - shaped container, a first heating pipe, and a first oxygenator connected in sequence; the first oxygenator is connected to the breeding tank through a water inlet pipe, and the circulation pump is connected to the breeding tank through a drain pipe.

[0010] The main function of System A is to decompose and filter the dissolved and particulate organic matter in the seedling rearing tank through the bacteria attached to the biological filter tank. After nitrification and denitrification, nutrients such as nitrates and phosphates are generated and provided for the growth of algae. The algae (Chlorella vulgaris) absorb nutrients after being irradiated by light in the algae cultivation columnar container. After reproduction and growth, the pH is balanced by temperature control and a calcium ion reactor, and then it is led to the seedling rearing tank by a reflux pump. That is, System A purifies and absorbs the water in the seedling rearing tank and uses the nutrients for the reproduction and growth of algae. After the algae grow, they provide sufficient nutrients (unsaturated fatty acids) for the planktonic bait (rotifers) in the seedling rearing tank to meet the growth and development of the larvae in the seedling rearing tank.

[0011] Furthermore, System B includes a second biological filter tank, a sand filter tank, a protein separator, a second heating pipe, a second calcium ion reactor, an ultraviolet disinfection machine, a second oxygenator, and a circulation water pump connected in sequence; the second oxygenator is connected to the seedling rearing tank through a water inlet pipe, and the circulation water pump is connected to the seedling rearing tank through a drain pipe.

[0012] The main function of System B is to remove the dissolved and particulate organic matter (water pollutants) contained in the water discharged from the seedling rearing tank through the sand filter tank, biological filter tank, and protein separator and discharge them from the system. The return water is heated, oxygenated, pH balanced, and disinfected, and then led into the seedling rearing tank by a water pump.

[0013] Furthermore, the irradiation intensity of the artificial light source in System A is 5000 LUX. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of an embodiment of a double - circulation system for artificial breeding of groupers in the present invention. Detailed Embodiment

[0015] The following is a more detailed description through specific embodiments:

[0016] The reference numerals in the accompanying drawings of the specification include: artificial light source 1, first biological filter tank 2, first calcium ion reactor 3, circulation pump 4, algae cultivation columnar container 5, first heating pipe 6, first oxygenator 7, second biological filter tank 8, sand filter tank 9, protein separator 10, second heating pipe 11, second calcium ion reactor 12, ultraviolet disinfection machine 13, second oxygenator 14, circulation water pump 15, water inlet pipe 16, drain pipe 17, seedling rearing tank 18, valve 19.

[0017] As shown in the embodiment Figure 1 A double - circulation system for artificial breeding of groupers includes a plurality of seedling rearing tanks 18, System A circulation system, and System B circulation system. Both System A circulation system and System B circulation system are connected to the plurality of seedling rearing tanks 18 through a water inlet pipe 16 and a drain pipe 17.

[0018] Among them, the A system includes an artificial light source 1, a first biological filter tank 2, a first calcium ion reactor 3, a circulation pump 4, an algae cultivation columnar container 5, a first heating pipe 6, and a first oxygenator 7 that are sequentially connected through pipelines; the irradiation intensity of the artificial light source 1 is 5000 LUX. The first oxygenator 7 is connected to the seedling rearing tank through a water inlet pipe 16, and the circulation pump 4 is connected to the seedling rearing tank through a drain pipe 17. The B system includes a second biological filter tank 8, a sand filter tank 9, a protein separator 10, a second heating pipe 11, a second calcium ion reactor 12, an ultraviolet disinfection machine 13, a second oxygenator 14, and a circulation water pump 15 that are sequentially connected; the second oxygenator is connected to the seedling rearing tank through a water inlet pipe 16, the circulation water pump 15 is connected to the seedling rearing tank through a drain pipe 17, and a valve 19 is installed on the drain pipe 17.

[0019] The steps of using this system for seedling rearing include the following:

[0020] (1) In the seedling rearing preparation stage, prepare multiple seedling rearing tanks, install two sets of circulation systems A and B in the culture pond. Both sets of circulation systems A and B are connected to multiple seedling rearing tanks. The two sets of systems A and B operate separately (without passing through the seedling rearing tanks, directly connected through pipelines and valves to control the water inlet pipe and the drain pipe), and test the release of organic matter to cultivate algae and bacteria in the biological filter tank (for 15 days);

[0021] (2) Put fish eggs into the seedling rearing tank in step (1). After the fish eggs hatch into fry and start to open their mouths, add rotifers to the seedling rearing tank and turn on the A system until the 18th day of age (the age is calculated from when the fry hatches out of the egg membrane);

[0022] (3) Starting from the 19th day of age of the fry, feed large planktonic biological baits. The biological baits are copepods or artemia, etc. Turn off the A system and turn on the B system to remove residual baits and fecal organic matter in the seedling rearing water body to maintain good water quality until the cultured fry reach a specification of 3 CM to complete the seedling rearing process.

[0023] In this embodiment, the main function of the A system is to decompose and filter the dissolved organic matter and particulate organic matter in the seedling rearing tank through the bacteria attached in the biological filter tank. After nitrification and denitrification, nitrate, phosphate and other nutrients are generated and provided for the growth of algae. The algae (Chlorella) absorb nutrients after being irradiated by the artificial light source 1 with a light intensity of 5000 LUX in the algae cultivation columnar container 5. After reproduction and growth, through temperature control adjustment (generally maintained at 27 °C) and the first calcium ion reactor 3 to balance the PH (maintaining 7.3 - 8.3), it is led to the seedling rearing tank by the reflux pump. That is, the A system purifies and absorbs the seedling rearing water body and uses the nutrients for the reproduction and growth of algae. After the algae grow, they provide sufficient nutrients (unsaturated fatty acids) for the planktonic biological baits (rotifers) in the seedling rearing tank to meet the growth and development of the fry in the seedling rearing tank.

[0024] The main function of System B is to remove the dissolved organic matter and particulate organic matter (water pollutants) contained in the water discharged from the seedling rearing tank through the sand filter tank 9, the second biological filter tank 8, and the protein separator 10 and then discharge them from the system. The recycled water is heated, oxygenated, pH balanced, and disinfected, and then introduced into the seedling rearing tank by the circulation water pump 15.

[0025] Since the growth of juvenile and larval groupers has high requirements for water quality and strict nutritional requirements for bait organisms, and there is a process of bait conversion during the seedling rearing process, that is, the transition stage from feeding on rotifers to copepods. Rotifers and copepod-like organisms are mostly cultivated outside the system and then artificially added to the seedling rearing system. System A mainly solves the problem of the bait of rotifers that are not eaten in the seedling rearing water body, and ensures that the nutrition of rotifers in the seedling rearing tank can meet the needs of fry. System A can filter and decompose the excreta produced by the growth of larvae through the biochemical water tank and convert them into nutrients for the utilization of algae, keeping the water quality fresh and clean. And the growth of algae meets the nutrition required for the feeding and growth of rotifers in the seedling rearing system, forming a highly efficient and automatic circulating closed-loop circulating ecological seedling rearing system that can isolate the influence of external pathogenic organisms and adverse climate to the greatest extent. In the later stage of seedling rearing (after 18 days old), the main bait organisms are copepods. At this time, the key to seedling rearing is to remove the excreta and residual bait of fry to keep the water body stable. The main function of System B is to treat a large amount of residual bait and excreta brought by fry feeding on copepods in the water body in the later stage of seedling rearing through a conventional RAS system to achieve the purpose of stabilizing the water body. System A has a positive feedback working mechanism. As the nutrients in the seedling rearing water body increase, the algae output from System A to the seedling rearing tank also increases accordingly. System B has a negative feedback working mechanism. As the pollutants in the seedling rearing tank increase, System B quickly removes the pollutants from the seedling rearing tank. The core of System A is the algae growth system, which converts excess substances and energy into the biological bait that early fry feed on, that is, rotifers, through the growth of algae, forming a positive feedback. The core of System B is the biochemical and physical reaction system, which discharges excess substances and energy from the system, forming a negative feedback.

[0026] Using this seedling rearing plan, during the entire seedling rearing cycle, the variation ranges of ecological factors such as water temperature, pH, N, and P in the seedling rearing water body are controllable, the seedling rearing water body is stable, and the seedling rearing success rate is over 50%.

[0027] The above are only embodiments of the present invention, and common knowledge such as the specific structures and characteristics known in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. An artificial breeding method for groupers, characterized in that, It comprises a double circulation system, which comprises a plurality of seedling water tanks, an A circulation system, and a B circulation system. The A circulation system and the B circulation system are connected to the plurality of seedling water tanks through a water inlet pipe and a drain pipe, and a valve is connected to the drain pipe. The A circulation system comprises an artificial light source and a first biological filter tank, a first calcium ion reactor, a circulation pump, an algae cultivation columnar container, a first heating pipe, and a first oxygenator connected in sequence; the first oxygenator is connected to the seedling water tank through a water inlet pipe, and the circulation pump is connected to the seedling water tank through a drain pipe; The following steps are also included: (1) In the seedling preparation stage, multiple seedling water tanks are prepared, and two circulation systems, namely, circulation system A and circulation system B, are installed in the culture pond. Both circulation systems, namely, circulation system A and circulation system B, are connected to multiple seedling water tanks. The circulation systems, namely, circulation system A and circulation system B, are operated separately, and organic matter is added to culture algae and bacteria in the first biological filter tank for 15 days; (2) placing fish eggs into the nursery water tank in step (1), adding rotifers into the nursery water tank after the fish eggs hatch and the fry open, and opening the A circulation system until the fry are 18 days old, wherein the age is calculated from the time the fry hatches the egg membrane; (3) Starting from the 19th day of age, the fry are fed with large plankton baits, which are copepods or Artemia. The A circulation system is closed and the B circulation system is opened to remove the residual bait and fecal organic matter in the nursery water to maintain good water quality until the fry reach the specification of 3CM to complete the nursery process; The function of the A circulation system is to decompose and filter the dissolved organic matter and particulate organic matter in the nursery water tank through the bacteria attached to the first biological filter tank, and then generate nitrate and phosphate nutrients after nitrification and denitrification to provide them for the growth of algae. The algae Chlorella absorbs nutrients after being irradiated by an artificial light with an illumination of 5000LUX in the algae culture columnar container. After reproduction and growth, it is guided to the nursery water tank by a reflux pump after temperature control and pH balance with the first calcium ion reactor; that is, the A circulation system purifies and absorbs the nursery water body and uses the nutrients for the reproduction and growth of algae. After the algae grows, it provides sufficient nutrition to the plankton bait in the nursery water tank, namely, rotifers, to meet the growth and development of the fry in the nursery water tank.

2. The artificial breeding method of groupers according to claim 1, characterized in that, The B circulation system includes a second biological filter tank, a sand filter tank, a protein separator, a second heating pipe, a second calcium ion reactor, an ultraviolet disinfector, a second oxygenator, and a circulating water pump which are connected in sequence; the second oxygenator is connected to the seedling water tank through a water inlet pipe, and the circulating water pump is connected to the seedling water tank through a drainage pipe.

3. The artificial breeding method of groupers according to claim 1, characterized in that The illumination intensity of artificial light in the A circulation system is 5000LUX.

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