Three-dimensional ecological fishpond culture system

Abstract

The invention discloses a three-dimensional ecological fishpond culture system in the field of aquaculture. The three-dimensional ecological fishpond culture system comprises the following steps: 1, wastewater collection and pretreatment; 2, sterilizing and preparing a culture medium; 3, live bait is cultured in the runway type culture tank; 4, a water circulation system and continuous filtration; and 5, artificial wetland treatment and pasture planting. According to the breeding system, wastewater generated after breeding is treated, the water quality is improved, sterilization treatment is conducted, appropriate nutritional ingredients are added, and then the wastewater is discharged into the breeding tank containing microalgae and zooplankton to provide needed nutritional ingredients for the microalgae and the zooplankton, so that the microalgae and the zooplankton are massively bred in the water body, bait is brought to fishes in the constructed wetland, and the quality of the fishes in the constructed wetland is improved. The mode that bait is input depending on the outside in traditional cultivation is changed, self-sufficiency of green bait is achieved, and dynamic balance and efficient cyclic utilization of water are achieved.

Description

Technical Field

[0001] The invention belongs to the field of aquaculture, and in particular relates to a three-dimensional ecological fish pond breeding system. Background Art

[0002] In recent years, with the rapid development of aquaculture, the problem of aquaculture wastewater treatment has become increasingly prominent. High ammonia nitrogen wastewater not only pollutes the environment, but also seriously restricts the sustainable development of aquaculture. Therefore, how to effectively treat aquaculture wastewater and realize water recycling has become a technical problem that needs to be solved in the current aquaculture field.

[0003] In traditional aquaculture, aquaculture wastewater is usually discharged after simple treatment using physical, chemical or biological methods, but these methods often have defects such as unstable treatment effects and high operating costs. At the same time, the release of bait also mostly relies on external input compound feed, which not only increases the cost of breeding, but may also have a certain impact on water quality. Therefore, the development of a breeding system that can efficiently treat aquaculture wastewater and achieve green bait self-sufficiency is of great significance to promote the green and healthy development of the aquaculture industry.

[0004] In response to the above technical problems, the existing technology has proposed some solutions, such as using artificial wetlands to treat aquaculture wastewater, using live baits such as microalgae for ecological aquaculture, and raceway fish farming methods. The so-called raceway fish farming is actually a breeding unit built in a pond. On one side of the water tank is a water-pushing and aeration device, which uses the fish's ability to swim against the current to allow the fry to continue swimming under the thrust of the water flow, and the fish's excrement and food residues will also be continuously pushed to the fish pond sewage collection area. This model of centralized breeding, centralized sewage absorption, and centralized treatment can achieve pollution-free aquaculture tail water and improve the quality of fish.

[0005] However, these technologies often have shortcomings such as low treatment efficiency, large footprint, and complex systems. In particular, in terms of how to organically combine aquaculture wastewater treatment with green bait cultivation to achieve green water circulation in aquaculture water bodies, existing technologies still have obvious defects and shortcomings. Summary of the invention

[0006] The present invention is intended to provide a three-dimensional ecological fish pond culture system to solve the problem that the existing aquaculture has obvious defects and shortcomings in treating aquaculture wastewater and realizing aquaculture water circulation.

[0007] A three-dimensional ecological fish pond breeding system in this scheme includes the following steps:

[0008] Step 1: Wastewater collection and pretreatment: The high-ammonia nitrogen wastewater generated during the breeding process is collected in the pretreatment tank, where large particle impurities and some harmful substances in the wastewater are removed by physical and biological methods;

[0009] Step 2: Sterilization and culture medium configuration: For the pre-treated wastewater, supplement nutrients and sterilize according to actual needs;

[0010] Step 3: Cultivating live bait in raceway-type culture tanks: Microalgae and zooplankton are set in the culture tanks, and the pre-treated wastewater is introduced into the raceway-type culture tanks as nutrients for the microalgae and zooplankton;

[0011] Step 4: Water circulation system and continuous filtration: The wastewater after the live bait is cultured is pumped into the water circulation system, and the water is continuously filtered and purified to form aquaculture water;

[0012] Step 5: Artificial wetland treatment and forage planting: The aquaculture water is discharged into the artificial wetland, and the fish are cultured in the artificial wetland. Forage is planted in the artificial wetland, and the microalgae and zooplankton that have been reproduced in the water can also be used as fish bait.

[0013] Furthermore, the nutrients supplied in step 2 are nitrogen and phosphorus, and the nitrogen-phosphorus ratio is adjusted according to the live feed required for breeding.

[0014] Furthermore, in step three, the breeding track is divided into closed type and open type according to demand.

[0015] Furthermore, in step three, the culture tank is provided with environmental conditions suitable for the growth of microalgae and zooplankton, such as light and temperature.

[0016] Furthermore, the water circulation system in step four includes a biological filter, a mechanical filter, etc.

[0017] Furthermore, in step five, the types of forage grass planted in the wetland include ryegrass, Sudan grass or sweet elephant grass, etc. The forage grass absorbs nutrients in the aquaculture water through its root system, further purifying the water quality.

[0018] The working principle and beneficial effects of this scheme: The aquaculture system treats the wastewater generated after aquaculture, improves the water quality, sterilizes it, adds appropriate nutrients, and then discharges it into a breeding tank containing microalgae and zooplankton to provide them with the required nutrients, so that microalgae and zooplankton reproduce in large quantities in the water body, providing bait for fish in the artificial wetland, changing the traditional aquaculture method of relying on external input of bait, and achieving self-sufficiency of green bait;

[0019] This breeding system has changed the static and easily polluted water conditions in traditional breeding, and achieved dynamic balance and efficient recycling of water bodies. At the same time, pasture can also be used as a food source for fish, realizing the resource utilization of wastewater and ecological breeding of fish, significantly improving the wastewater treatment efficiency, and continuously improving the water quality of breeding. The self-sufficient bait has greatly reduced the breeding cost and increased the nutritional value of the bait. The setting of artificial wetlands further purifies the water quality and provides an additional food source for fish, achieving dynamic balance and efficient recycling of water bodies. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] A three-dimensional ecological fish pond breeding system:

[0022] The steps include:

[0023] Step 1: Wastewater collection and pretreatment:

[0024] ① Collect the high-ammonia nitrogen wastewater generated during the breeding process into a special pretreatment pool;

[0025] ② In the pretreatment tank, large particles of impurities and some harmful substances in the wastewater are removed by physical and biological methods;

[0026] ③ The water quality of the pretreated wastewater is improved, creating conditions for the cultivation of live bait and water recycling in subsequent steps.

[0027] Step 2: Sterilization and culture medium preparation:

[0028] The pre-treated wastewater is supplemented with nutrients and sterilized according to the actual needs of the aquaculture feed, especially the adjustment of the nitrogen-phosphorus ratio.

[0029] Step 3: Cultivate live bait in raceway-type breeding tanks:

[0030] ① The pre-treated wastewater is introduced into the raceway-type breeding tank. The breeding raceway can be closed or open according to the needs;

[0031] ② Microalgae and zooplankton are set in the breeding tank, which can be used as fish bait after reproduction;

[0032] ③ The breeding tank is equipped with environmental conditions suitable for the growth of microalgae and zooplankton, such as light and temperature;

[0033] ④This structure changes the traditional breeding method of relying on external input of bait and realizes self-sufficiency in green bait.

[0034] Step 4: Water circulation system and continuous filtration:

[0035] ①Pump the water in the breeding tank into the water circulation system, which includes multiple filtering units such as biological filter tanks and mechanical filters;

[0036] ②Continuously filter and purify the water to form aquaculture water;

[0037] ③This circulation system changes the static and easily polluted water conditions in traditional aquaculture, and achieves dynamic balance and efficient recycling of water.

[0038] Step 5: Artificial wetland treatment and forage planting:

[0039] ① Drain the aquaculture water into artificial wetlands and culture fish in artificial wetlands;

[0040] ② The artificial wetlands are planted with grasses that fish like to eat, such as ryegrass, Sudan grass, sweet elephant grass, etc.;

[0041] ③ The grass absorbs nutrients in the aquaculture water through its root system, further purifying the water quality;

[0042] ④At the same time, forage grass serves as another food source for fish, realizing wastewater resource utilization and ecological breeding of fish.

[0043] Through the above working process, the three-dimensional ecological fish pond breeding system realizes the efficient treatment of breeding wastewater and the self-sufficiency of green bait.

[0044] The advantages brought about by the change of the breeding system are mainly reflected in:

[0045] 1. The wastewater treatment efficiency has been significantly improved, and the water quality has been continuously improved. The water quality of the water body has been improved by fish ingesting microalgae and zooplankton, and the grass in the artificial wetland can further purify the water quality and improve the utilization rate of wastewater;

[0046] 2. The self-sufficiency of green bait has changed the traditional breeding method of relying on external input of bait, reduced breeding costs, and improved the overall nutritional value of bait;

[0047] 3. The establishment of a water circulation system achieves dynamic balance and efficient recycling of water bodies, realizes resource utilization of wastewater, and reduces the susceptibility of water bodies to pollution;

[0048] 4. The establishment of artificial wetlands further purifies the water quality. The grass can not only absorb the microalgae and zooplankton in the water to purify the water, but also provide an additional food source for fish. Fish can not only swallow microalgae and zooplankton, but also swallow grass, ensuring the ecological breeding of fish.

[0049] In summary, this three-dimensional ecological fish pond farming system achieves green, healthy and sustainable development of aquaculture through its unique working process and structural design.

[0050] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A three-dimensional ecological fish pond breeding system, characterized by: The steps include: Step 1: Wastewater collection and pretreatment: The high-ammonia nitrogen wastewater generated during the breeding process is collected in the pretreatment tank, where large particle impurities and some harmful substances in the wastewater are removed by physical and biological methods; Step 2: Sterilization and culture medium configuration: For the pre-treated wastewater, supplement nutrients and sterilize according to actual needs; Step 3: Cultivating live bait in raceway-type culture tanks: Microalgae and zooplankton are set in the culture tanks, and the pre-treated wastewater is introduced into the raceway-type culture tanks as nutrients for the microalgae and zooplankton; Step 4: Water circulation system and continuous filtration: The wastewater after the live bait is cultured is pumped into the water circulation system, and the water is continuously filtered and purified to form aquaculture water; Step 5: Artificial wetland treatment and forage planting: The aquaculture water is discharged into the artificial wetland, and the fish are cultured in the artificial wetland. Forage is planted in the artificial wetland, and the microalgae and zooplankton that have been reproduced in the water can also be used as fish bait.

2. A three-dimensional ecological fish pond breeding system according to claim 1, characterized in that: The nutrients supplied in step 2 are nitrogen and phosphorus, and the nitrogen-phosphorus ratio is adjusted according to the live feed required for breeding.

3. The three-dimensional ecological fish pond breeding system according to claim 1 is characterized in that: In step three, the breeding track is divided into closed type and open type according to demand.

4. The three-dimensional ecological fish pond culture system according to claim 1 is characterized in that: In step three, the culture tank is provided with environmental conditions suitable for the growth of microalgae and zooplankton, such as light and temperature.

5. The three-dimensional ecological fish pond breeding system according to claim 1 is characterized in that: The water circulation system in step 4 includes a biological filter, a mechanical filter, etc.

6. The three-dimensional ecological fish pond breeding system according to claim 1, characterized in that: In step 5, the types of forage grass planted in the wetland include ryegrass, Sudan grass or sweet elephant grass, etc. The forage grass absorbs nutrients in the aquaculture water through its root system to further purify the water quality.