Circulating running water ecological breeding method combined with standardized fishpond

Abstract

The invention belongs to the technical field of aquaculture, and provides a circulating water ecological breeding method combined with a standardized fishpond, which comprises the following steps: constructing the standardized fishpond, and planning the layout of the pond; a pond project is built, and supporting facilities are installed; a factory-like circulating running water system is constructed and is composed of a culture pond, a solid-liquid separation device, a biological purification device, a disinfection device, an oxygenation device, a temperature control device and a circulating water pump. Implementing ecological breeding measures, including building a fish and vegetable symbiotic system, regulating and controlling aquatic plants and microorganisms, and performing multi-variety polyculture; daily monitoring and management are carried out; according to the industrial circulating running water system, aquaculture water is recycled through the industrial circulating running water system, the discharge of aquaculture tail water is greatly reduced, the pressure of aquaculture on water resources is effectively relieved, and sustainable utilization of the water resources is protected; by implementing ecological breeding measures, balance and stability of an ecological system are promoted, use of chemical drugs is reduced, and biodiversity and ecological safety are protected.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, in particular to a circulating water ecological aquaculture method combined with a standardized fish pond. Background Art

[0002] As the global aquaculture industry continues to develop, the scale and output of aquaculture continue to rise, playing a key role in meeting people's demand for aquatic products;

[0003] However, from the perspective of water resource utilization, traditional aquaculture models mostly adopt open-flow aquaculture, and the aquaculture water is directly discharged after one-time use. This makes the aquaculture process consume a huge amount of water, a large amount of water resources are wasted, and the crisis of water shortage is aggravated. According to statistics, traditional open-flow aquaculture consumes several tons of water to produce 1 kilogram of aquatic products. Not only that, the discharge of a large amount of aquaculture tail water has put heavy pressure on water resources, seriously affecting the sustainable use of water resources, and it is difficult to meet the development requirements of today's water-saving society.

[0004] Traditional technologies also have obvious defects in the treatment of aquaculture tailwater. Many farms do not pay enough attention to the treatment of aquaculture tailwater, or only use simple primary treatment methods such as sedimentation, which makes it difficult to remove harmful substances such as solid pollutants, nitrogen and phosphorus nutrients, and pathogens in the tailwater. Once these untreated tailwaters are discharged into the surrounding water bodies, they will cause eutrophication of the water bodies, lead to excessive reproduction of algae, consume a large amount of dissolved oxygen in the water, cause fish and other aquatic organisms to die of hypoxia, destroy the balance of the ecological environment of the water, increase the pollution risk of the surrounding water environment, and pose a threat to the stability of the ecosystem.

[0005] In addition, in the ecological breeding link, traditional breeding technology mostly relies on chemical drugs to prevent and treat diseases and maintain the stability of the breeding environment. Although this method controls diseases to a certain extent, the large-scale use of chemical drugs destroys the ecological balance of the breeding water, inhibits the growth of beneficial microorganisms, and reduces the self-purification capacity of the water. At the same time, the frequent use of chemical drugs will cause pathogens to develop drug resistance, further increasing the difficulty of disease prevention and control. Moreover, the residues of chemical drugs in aquatic products not only affect the quality and safety of aquatic products, but may also cause potential harm to human health through the food chain and damage biodiversity and ecological security.

[0006] To this end, technicians in this field have proposed a circulating water ecological aquaculture method combined with standardized fish ponds, aiming to achieve the recycling and reuse of aquaculture water, create a controllable aquaculture environment, and take into account both efficient production and ecological protection, thereby effectively promoting the sustainable development of the aquaculture industry. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a circulating water ecological breeding method combined with a standardized fish pond to solve the problems raised in the background technology.

[0008] A circulating water ecological breeding method combined with a standardized fish pond comprises the following steps:

[0009] S1. Build standardized fish ponds and plan pond layout;

[0010] S2. Construct pond projects and install supporting facilities;

[0011] S3. Construct a factory-scale circulating water system, which consists of a breeding pond, a solid-liquid separation device, a biological purification device, a disinfection device, an oxygenation device, a temperature control device and a circulating water pump;

[0012] S4. Implement ecological farming measures, including building fish-vegetable symbiotic systems, regulating aquatic plants and microorganisms, and multi-species polyculture;

[0013] S5. Carry out daily monitoring and management.

[0014] Preferably, the standardized fish pond is selected in an area with sufficient water source, good water quality and good soil water retention, away from pollution and residential areas;

[0015] The pond layout adopts a continuous area of ​​more than 100 acres according to the breeding scale and topography. The area of ​​a single pond is 5-20 acres, the shape is rectangular, the length-to-width ratio is 3:1-5:1, and space is reserved for the tailwater treatment area and the supporting facilities.

[0016] Preferably, the pond engineering construction adopts a pool bank reinforcement method, the height is 0.5-1 meter higher than the highest water level, the slope is 1:2-1:3, and the top width is 1.5-3 meters;

[0017] During the construction of the pond project, the depth of the pond is controlled at 2-4 meters, the bottom is inclined toward the drain, and the slope is set at 0.5% to 1%;

[0018] During the construction of the pond project, independent water inlet and outlet systems are set up. The water inlet is higher than the water surface of the pond, and water is introduced into the pond through pipes or ditches. The drain outlet is located at the lowest point of the pond, connected to the drainage pipe or ditch, and equipped with a drainage gate valve.

[0019] Preferably, the supporting facilities include oxygenation equipment, feeding equipment and water quality monitoring equipment;

[0020] The oxygenation equipment is an impeller type, waterwheel type or microporous aeration type aerator, and one aerator with a power of 1.5 kilowatts to 3 kilowatts is equipped for every 5-10 mu;

[0021] The feeding equipment adopts an automatic feeding machine, and the feeding time and feeding amount are set according to the breeding species and growth stage, so as to carry out regular and quantitative feeding;

[0022] The water quality monitoring equipment includes a water quality detector and an online water quality monitoring system, which are used to monitor water quality indicators in real time;

[0023] The supporting facilities also include anti-escape facilities, which include fences and anti-escape walls.

[0024] Preferably, the industrial circulating water system process includes the following steps:

[0025] S301, the aquaculture water in the aquaculture pond first flows into the solid-liquid separation device under the action of the circulating water pump, and solid particles in the water are separated and removed by a microfilter and an arc screen device to obtain water after solid-liquid separation;

[0026] S302, the water body after solid-liquid separation enters the biological purification device, and the harmful substances of ammonia nitrogen and nitrite in the water body after solid-liquid separation are converted into harmless nitrate by microorganisms on the biofilm to obtain purified water body;

[0027] S303, the purified water body passes through the disinfection device, and ultraviolet rays and ozone disinfection methods are used to kill pathogens and harmful microorganisms in the water to obtain disinfected water body;

[0028] S304, the water body after disinfection and sterilization is passed through the oxygenation device to increase the dissolved oxygen content of the water body to obtain oxygenated water body;

[0029] S305, the temperature control device adjusts the water temperature of the oxygenated water body according to the suitable temperature range of the culture species to obtain the temperature-adjusted water body;

[0030] S306, the temperature-adjusted water body flows back to the standardized fish pond, and the water in the standardized fish pond flows back to the breeding pond.

[0031] Preferably, the fish-vegetable symbiotic system organically combines aquaculture with vegetable planting, and in the standardized fish pond or factory-scale circulating water system, a floating bed cultivation and substrate cultivation method are used to set up a vegetable planting area, and the ratio of the vegetable planting area to the aquaculture water surface area is 1:5-1:10;

[0032] The aquaculture tail water in the aquaculture pond is transported to the vegetable planting area after being decomposed by microorganisms, and flows back after being purified.

[0033] Preferably, the regulating aquatic plants and microorganisms is to plant aquatic plants around the standardized fish pond or in an industrial circulating water system;

[0034] Beneficial microbial preparations are regularly added into the aquaculture water body. The beneficial microbial preparations include photosynthetic bacteria, bacillus, and lactic acid bacteria, which are used to decompose organic matter and improve water quality.

[0035] Preferably, the multi-species mixed farming is to use silver carp, bighead carp and dace that feed on plankton as the main species, and grass carp and crucian carp that feed on benthic organisms or artificial feed as the supplementary species, and carry out combined farming; the main species accounts for 60% to 80%, and the supplementary species accounts for 20% to 40%.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The present invention recycles aquaculture water through a factory-based circulating water system, greatly reducing the discharge of aquaculture tail water. The water saving rate can reach 70% to 90%, effectively alleviating the pressure of aquaculture on water resources and protecting the sustainable use of water resources.

[0038] 2. The present invention deeply treats aquaculture tail water through solid-liquid separation, biological purification, disinfection and other links, removes solid pollutants, nitrogen and phosphorus nutrients, pathogenic bacteria and other harmful substances therein, reduces the pollution risk of aquaculture tail water to the surrounding water environment, and protects the ecological environment of the water area.

[0039] 3. The present invention constructs a virtuous ecological cycle by implementing ecological farming measures, including fish-vegetable symbiosis, aquatic plants and microbial regulation, promotes the balance and stability of the ecosystem, reduces the use of chemical drugs, and is conducive to protecting biodiversity and ecological security. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a flow chart of the circulating water ecological breeding method combined with a standardized fish pond of the present invention;

[0041] Figure 2 This is a flow chart of the factory-scale circulating water system of the present invention. DETAILED DESCRIPTION

[0042] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0043] As attached Figure 1 As shown:

[0044] Embodiment: The present invention provides a circulating water ecological breeding method combined with a standardized fish pond, comprising the following steps:

[0045] S1. Build standardized fish ponds and plan the layout of the ponds. The site selection of standardized fish ponds needs to comprehensively consider factors such as water sources, soil, transportation and surrounding environment. The ideal location should have sufficient and high-quality water sources. The pH, dissolved oxygen, ammonia nitrogen and other indicators of the water source must meet the requirements of aquaculture. At the same time, water access should be convenient to meet the water demand during the peak period of aquaculture. Soil with good water retention and good air permeability is preferred to prevent water seepage in the pond. Convenient transportation is conducive to the transportation of seedlings and feed and the sale of adult fish. The surrounding environment should be free of industrial pollution and noise interference, and far away from residential areas and livestock and poultry farms to avoid the spread of diseases;

[0046] The pond layout is based on the aquaculture scale and topography. It adopts a contiguous pattern of more than 100 mu. The area of ​​a single pond is 5-20 mu, the shape is rectangular, the length-to-width ratio is 3:1-5:1, and space is reserved for tailwater treatment area and supporting facilities.

[0047] S2. Construct pond projects and install supporting facilities;

[0048] The pond project construction adopts the method of pond embankment reinforcement, with a height of 0.5-1 meter above the highest water level, a slope of 1:2-1:3, and a top width of 1.5-3 meters; and adopts methods such as compacting earth and laying slope protection materials (such as precast cement slabs and geomembranes) to prevent pond embankment collapse and soil erosion.

[0049] During pond construction, the depth of the pond is controlled at 2-4 meters, and the bottom is inclined toward the drain outlet with a slope of 0.5% to 1%, which is conducive to drainage and silt removal;

[0050] During pond construction, independent water inlet and outlet systems are set up. The water inlet is higher than the pond water surface, and water is introduced into the pond through pipes or ditches. The drain outlet is located at the lowest point of the pond, connected to the drainage pipe or ditch, and equipped with a drain valve to quickly drain the pond water.

[0051] The installation of supporting facilities includes oxygenation equipment, feeding equipment and water quality monitoring equipment;

[0052] The oxygenation equipment is an impeller-type, waterwheel-type or microporous aeration-type oxygenator. One 1.5-3 kilowatt oxygenator is equipped for every 5-10 mu to ensure that the aquaculture water has sufficient dissolved oxygen to meet the growth needs of fish.

[0053] The feeding equipment uses an automatic feeding machine, which sets the feeding time and feeding amount according to the breeding species and growth stage, and feeds at regular intervals and in fixed quantities to improve feed utilization and reduce waste and water pollution;

[0054] Water quality monitoring equipment includes water quality detectors and online water quality monitoring systems, which are used to monitor water quality indicators in real time, such as water temperature, pH value, dissolved oxygen, ammonia nitrogen, nitrite, etc., to provide data support for scientific breeding;

[0055] Supporting facilities also include anti-escape facilities, which include fences and anti-escape walls to prevent farmed fish from escaping.

[0056] S3. Construct a factory-scale circulating water system, which consists of a breeding pond, a solid-liquid separation device, a biological purification device, a disinfection device, an oxygenation device, a temperature control device and a circulating water pump; Figure 2 As shown, the process includes the following steps:

[0057] S301, the aquaculture water in the aquaculture pond flows into the solid-liquid separation device under the action of the circulating water pump, and the solid particles in the water are separated and removed by the microfiltration machine and the curved screen equipment to reduce the burden of subsequent processing and obtain the water after solid-liquid separation;

[0058] S302, the water body after solid-liquid separation enters the biological purification device, and the microorganisms on the biofilm convert the harmful substances of ammonia nitrogen and nitrite in the water body after solid-liquid separation into harmless nitrates, thereby purifying the water quality and obtaining the purified water body;

[0059] S303, the purified water body passes through a disinfection device, and ultraviolet rays and ozone disinfection methods are used to kill pathogens and harmful microorganisms in the water to obtain disinfected and sterilized water body;

[0060] S304, the water body after disinfection and sterilization is passed through an oxygenation device to increase the dissolved oxygen content of the water body to obtain an oxygenated water body;

[0061] S305, the temperature control device adjusts the water temperature of the aerated water body according to the suitable temperature range of the aquaculture species to obtain the temperature-adjusted water body;

[0062] S306, the water after temperature adjustment flows back to the standardized fish pond, and the water in the standardized fish pond flows back to the breeding pond, and this cycle is repeated to keep the breeding water stable and clean.

[0063] Microfiltration machine: Filter aquaculture tail water through a stainless steel screen, the mesh number of the screen is generally between 600-1000 mesh; tail water flows in from the water inlet and passes through the screen under the action of water flow, solid particles are intercepted on the screen, and as the screen rotates, they are washed to the collection tank and discharged; it has the advantages of high filtration efficiency, high degree of automation, and easy operation, and can effectively remove most of the suspended solids in the water.

[0064] Biological filter: The interior is filled with biological fillers, such as three-dimensional elastic fillers, suspended ball fillers, etc., which provide a carrier for microorganisms to attach and grow; the aquaculture tail water flows slowly in the biological filter, and the microorganisms decompose and transform the nitrogen-containing pollutants in the water under aerobic conditions; the treatment capacity of the biological filter depends on the specific surface area of ​​the filler, the amount of microorganisms and the water flow residence time. The general design water flow residence time is 1-3 hours, which can be adjusted according to the water quality conditions.

[0065] Ultraviolet sterilizer: uses the bactericidal effect of ultraviolet rays to disinfect aquaculture water; it is composed of ultraviolet lamps, quartz sleeves, reactors and other parts. When water flows through the reactor, ultraviolet rays irradiate the water, destroying the DNA structure of microorganisms, causing them to lose their ability to reproduce and infect; ultraviolet disinfection has the advantages of fast sterilization speed, high efficiency, and no residue, and has a good killing effect on common bacteria, viruses, parasites, etc.

[0066] Circulating water pump: It has the characteristics of corrosion resistance, low energy consumption, and stable operation. Generally, water pumps made of stainless steel or engineering plastics are selected to ensure long-term stable operation. It is responsible for promoting the circulation of aquaculture water in the system. Its flow rate and head are determined according to factors such as the scale of aquaculture and the layout of system pipelines.

[0067] S4. Implement ecological farming measures, including building fish-vegetable symbiotic systems, regulating aquatic plants and microorganisms, and multi-species polyculture;

[0068] The fish-vegetable symbiotic system organically combines aquaculture with vegetable planting. In a standardized fish pond or a factory-based circulating water system, floating bed cultivation and substrate cultivation methods are used to set up vegetable planting areas, and aquatic vegetables such as water spinach, lettuce, and water celery are selected for planting. The ratio of vegetable planting area to aquaculture water surface area is 1:5-1:10. Organic matter such as fish feces and leftover bait in the aquaculture water is decomposed by microorganisms and converted into nutrients such as ammonia nitrogen, which are transported to the vegetable planting area through pipes. The vegetable roots absorb these nutrients for growth, while purifying the water at the same time. The purified water is then returned to the aquaculture area, realizing the recycling of water resources and ecological balance.

[0069] The tail water from the breeding pond is transported to the vegetable planting area after being decomposed by microorganisms, and then returned after being purified.

[0070] Regulation of aquatic plants and microorganisms is to plant aquatic plants, such as water lilies, lotus, calamus, etc., around standardized fish ponds or in factory-based circulating water systems. Aquatic plants absorb nitrogen, phosphorus and other nutrients in the water through photosynthesis, inhibit excessive algae reproduction, and play a role in purifying water quality and regulating water ecology.

[0071] Beneficial microbial preparations are regularly added to aquaculture water bodies. Beneficial microbial preparations include photosynthetic bacteria, Bacillus, and lactic acid bacteria. Microorganisms reproduce and grow in water bodies, participate in material circulation and energy conversion, decompose organic matter, reduce the content of harmful substances such as ammonia nitrogen and nitrite in water bodies, improve the microecological environment of water bodies, and enhance the immunity of farmed organisms.

[0072] Multi-species polyculture is a combination of silver carp, bighead carp and dace carp that feed on plankton as the main species, and grass carp and crucian carp that feed on benthic organisms or artificial feed as supplementary species; the main species accounts for 60% to 80%, and the supplementary species accounts for 20% to 40%.

[0073] S5. Daily monitoring and management: In daily operation and management, water quality parameters should be closely monitored, and system operation parameters should be adjusted in time according to changes in water quality. When the concentrations of ammonia nitrogen and nitrite increase, the water retention time in the biofilter can be appropriately increased to improve the purification efficiency of microorganisms. When the dissolved oxygen content decreases, the start time and power of the aerator should be increased. The equipment should be regularly maintained to check whether the microfilter screen is damaged, whether the biofilter filler is blocked, whether the ultraviolet lamp is emitting light normally, etc., and debris and dirt in the equipment should be cleaned in time, and damaged parts should be replaced to ensure the normal operation of the equipment. The breeding density should be reasonably controlled, and the appropriate stocking amount should be determined according to the breeding species, specifications and system processing capacity to avoid water quality deterioration and disease occurrence due to excessive breeding density. At the same time, feed scientifically, follow the principle of "timing, fixed point, fixed quality and fixed quantity" to reduce the production of residual bait.

[0074] From the above, we can see that this farming model significantly improves the production and quality of farming. Its factory-based circulating water system provides a stable and suitable growth environment for fish, and the breeding density can be greatly increased. Compared with traditional pond farming, the output can be increased several times or even dozens of times; at the same time, through precise feeding, water quality control and disease prevention, the growth rate of farmed fish is accelerated, the specifications are uniform, the quality is excellent, and the market price is higher; in addition, this model effectively reduces production costs; and ecological farming measures such as fish-vegetable symbiosis and reasonable mixed breeding reduce feed input and disease prevention and control drug costs. In summary, the economic benefits of this standardized fish pond combined with factory-based circulating water ecological farming model are significantly higher than those of traditional farming models, with a good return on investment, which can bring higher returns to farmers.

[0075] Case 1: Hengzhou Taoxu Zhongke Fishery Technology Co., Ltd.:

[0076] The company has built large-scale standardized fish ponds and modern factory-scale recirculating water aquaculture facilities.

[0077] The standardized fish pond covers an area of ​​300 acres and is planned and constructed according to high standards. It is equipped with a complete water supply and drainage system, oxygenation equipment, feeding equipment and water quality monitoring equipment.

[0078] The factory-scale circulating water system adopts advanced technologies and equipment, including microfiltration machines, biological filters, ultraviolet disinfectors, ozone generators, circulating water pumps, etc., which can achieve efficient circulation treatment and precise regulation of aquaculture water.

[0079] In terms of ecological farming, the company has built a fish-vegetable symbiotic system and planted a large number of aquatic vegetables. At the same time, it has planted a variety of aquatic plants around the pond and in the ecological purification area, and regularly released beneficial microbial preparations.

[0080] By implementing this breeding model, the company's production of high-quality fish such as sea bass and mandarin fish has increased significantly, with annual output reaching more than 500 tons. The product quality is excellent and is very popular in the market.

[0081] At the same time, aquaculture effluent was discharged in compliance with discharge standards, and the ecological environment was effectively protected.

[0082] The company's economic and ecological benefits have been significantly improved, making it a model enterprise in the local aquaculture industry.

[0083] Case 2: Qinzhou Zhongke Fishery Technology Co., Ltd.:

[0084] The company's farm used the original pond for standardized transformation and introduced a factory-based circulating water ecological farming model.

[0085] The area of ​​the pond after standardized transformation is 200 acres, the bank has been reinforced, the slope has been protected, the water supply and drainage system has been optimized, and it is equipped with intelligent oxygenation and feeding equipment.

[0086] The factory-scale circulating water system is customized according to the aquaculture species and scale, and adopts efficient solid-liquid separation devices, biological purification devices and disinfection devices to ensure the stability and cleanliness of the aquaculture water.

[0087] In terms of ecological farming, the farm has carried out reasonable mixed farming, scientifically combining grass carp, crucian carp, silver carp, bighead carp, dace carp and other species, and used idle land around the pond to build artificial wetlands, planted aquatic plants such as reeds and calamus, and further purified the aquaculture effluent.

[0088] By implementing this model, the breeding efficiency of the farm has been significantly improved, the production cost has been reduced by more than 30%, and the pollutant emissions from aquaculture effluent have been reduced by more than 80%.

[0089] The successful experience of the farm has been widely promoted locally, prompting surrounding farmers to adopt new breeding models and promoting the green development of the regional aquaculture industry.

[0090] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in the application. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to specific embodiments, but extends to a variety of modifications still falling within the scope of the appended claims.

[0091] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0092] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0093] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A circulating water ecological breeding method combined with standardized fish ponds, characterized in that: The following steps are involved: S1. Build standardized fish ponds and plan pond layout; S2. Construct pond projects and install supporting facilities; S3. Construct a factory-scale circulating water system, which consists of a breeding pond, a solid-liquid separation device, a biological purification device, a disinfection device, an oxygenation device, a temperature control device and a circulating water pump; S4. Implement ecological farming measures, including building fish-vegetable symbiotic systems, regulating aquatic plants and microorganisms, and multi-species polyculture; S5. Carry out daily monitoring and management.

2. A circulating water ecological aquaculture method combined with a standardized fish pond as claimed in claim 1, characterized in that: The standardized fish ponds are located in areas with sufficient water sources, good water quality, and good soil water retention, away from pollution and residential areas; The pond layout adopts a continuous area of ​​more than 100 acres according to the breeding scale and topography. The area of ​​a single pond is 5-20 acres, the shape is rectangular, the length-to-width ratio is 3:1-5:1, and space is reserved for the tailwater treatment area and the supporting facilities.

3. A circulating water ecological aquaculture method combined with a standardized fish pond as claimed in claim 1, characterized in that: The pond project is constructed by using a pool bank reinforcement method, with a height of 0.5-1 meter above the highest water level, a slope of 1:2-1:3, and a top width of 1.5-3 meters; During the construction of the pond project, the depth of the pond is controlled at 2-4 meters, the bottom is inclined toward the drain, and the slope is set at 0.5% to 1%; During the construction of the pond project, independent water inlet and outlet systems are set up. The water inlet is higher than the water surface of the pond, and water is introduced into the pond through pipes or ditches. The drain outlet is located at the lowest point of the pond, connected to the drainage pipe or ditch, and equipped with a drainage gate valve.

4. A circulating water ecological aquaculture method combined with a standardized fish pond as claimed in claim 1, characterized in that: The supporting facilities installed include oxygenation equipment, feeding equipment and water quality monitoring equipment; The oxygenation equipment is an impeller type, waterwheel type or microporous aeration type aerator, and one aerator with a power of 1.5 kilowatts to 3 kilowatts is equipped for every 5-10 mu; The feeding equipment adopts an automatic feeding machine, and the feeding time and feeding amount are set according to the breeding species and growth stage, so as to carry out regular and quantitative feeding; The water quality monitoring equipment includes a water quality detector and an online water quality monitoring system, which are used to monitor water quality indicators in real time; The supporting facilities also include anti-escape facilities, which include fences and anti-escape walls.

5. A circulating water ecological aquaculture method combined with a standardized fish pond as claimed in claim 1, characterized in that: The industrial circulating water system process includes the following steps: S301, the aquaculture water in the aquaculture pond first flows into the solid-liquid separation device under the action of the circulating water pump, and solid particles in the water are separated and removed by a microfilter and an arc screen device to obtain water after solid-liquid separation; S302, the water body after solid-liquid separation enters the biological purification device, and the harmful substances of ammonia nitrogen and nitrite in the water body after solid-liquid separation are converted into harmless nitrate by microorganisms on the biofilm to obtain purified water body; S303, the purified water body passes through the disinfection device, and ultraviolet rays and ozone disinfection methods are used to kill pathogens and harmful microorganisms in the water to obtain disinfected water body; S304, the water body after disinfection and sterilization is passed through the oxygenation device to increase the dissolved oxygen content of the water body to obtain oxygenated water body; S305, the temperature control device adjusts the water temperature of the oxygenated water body according to the suitable temperature range of the culture species to obtain the temperature-adjusted water body; S306, the temperature-adjusted water body flows back to the standardized fish pond, and the water in the standardized fish pond flows back to the breeding pond.

6. A circulating water ecological aquaculture method combined with a standardized fish pond as claimed in claim 1, characterized in that: The fish-vegetable symbiotic system organically combines aquaculture with vegetable planting. In the standardized fish pond or factory-scale circulating water system, a floating bed cultivation and substrate cultivation method are used to set up a vegetable planting area, and the ratio of the vegetable planting area to the aquaculture water surface area is 1:5-1:10; The aquaculture tail water in the aquaculture pond is transported to the vegetable planting area after being decomposed by microorganisms, and flows back after being purified.

7. The circulating water ecological aquaculture method combined with a standardized fish pond as claimed in claim 1, characterized in that: The regulating aquatic plants and microorganisms is to plant aquatic plants around the standardized fish pond or in the factory-scale circulating water system; Beneficial microbial preparations are regularly added into the aquaculture water body. The beneficial microbial preparations include photosynthetic bacteria, bacillus, and lactic acid bacteria, which are used to decompose organic matter and improve water quality.

8. The circulating water ecological aquaculture method combined with a standardized fish pond as claimed in claim 1, characterized in that: The multi-species mixed farming is to use silver carp, bighead carp and dace that feed on plankton as the main species, and grass carp and crucian carp that feed on benthic organisms or artificial feed as supplementary species, and carry out combined farming; the main species accounts for 60%-80%, and the supplementary species accounts for 20% to 40%.

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