CN110679525A - Industrial litopenaeus vannamei cultivation method, pollution discharge method and pollution discharge system - Google Patents
Industrial litopenaeus vannamei cultivation method, pollution discharge method and pollution discharge system Download PDFInfo
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- 241000238553 Litopenaeus vannamei Species 0.000 title claims abstract description 61
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- 241000238557 Decapoda Species 0.000 claims abstract description 43
- 239000010865 sewage Substances 0.000 claims abstract description 40
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 238000009313 farming Methods 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 10
- 238000009395 breeding Methods 0.000 claims description 9
- 239000002071 nanotube Substances 0.000 claims description 8
- 230000001488 breeding effect Effects 0.000 claims description 7
- 238000012258 culturing Methods 0.000 claims description 7
- 238000006213 oxygenation reaction Methods 0.000 claims description 7
- 239000002107 nanodisc Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 241000193830 Bacillus <bacterium> Species 0.000 claims description 3
- 241000894006 Bacteria Species 0.000 claims description 3
- 241000186660 Lactobacillus Species 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
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- 229940039696 lactobacillus Drugs 0.000 claims description 3
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- 238000012546 transfer Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
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- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
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- 230000002441 reversible effect Effects 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/59—Culture of aquatic animals of shellfish of crustaceans, e.g. lobsters or shrimps
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/003—Aquaria; Terraria
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Farming Of Fish And Shellfish (AREA)
Abstract
The invention belongs to the technical field of penaeus vannamei boone cultivation, and discloses an industrial penaeus vannamei boone cultivation method, a pollution discharge method and a pollution discharge system, which comprise the following steps: starting the first-stage rough cultivation after the shrimp seeds about 0.5 cm enter the factory, setting the density of the shrimp seeds at 3000-; starting the second-stage culture when the shrimp seedlings reach 1000-; the third section of cultivation is started when the number of the prawns reaches 200 plus 300 per jin, the seedling density is set at 700 plus 800 per square of water after the pond division, and the prawns can be sold in the market after about thirty days of cultivation. The method for effectively discharging the sewage is realized by combining three systems of the shape design of the culture pond, the design of a sewage discharge pipeline and the design of an oxygen increasing system.
Description
Technical Field
The invention belongs to the technical field of penaeus vannamei boone cultivation, and particularly relates to an industrial penaeus vannamei boone cultivation method, a pollution discharge method and a pollution discharge system.
Background
Currently, the closest prior art: penaeus vannamei Boone (known as Litopenaeus vannamei) is a whole-ball breed. The penaeus vannamei boone industry is rapidly developed after 2000 years, and the penaeus vannamei boone industry gradually becomes the national aquaculture pillar industry.
The existing penaeus vannamei boone cultivation in China is generally in a pond cultivation mode, and high cultivation density is maintained by installing a plurality of oxygen increasing machines and changing a large amount of water in both traditional pond cultivation and high pond cultivation. The breeding mode has the problems of energy consumption, water consumption and serious pollution, and the development of the breeding industry of the penaeus vannamei boone is seriously restricted. According to survey data, the annual water discharge of unit shrimp culture in a fresh water pond mainly used for culturing penaeus vannamei boone is 3.0-4.5 m & lt 3 & gt/kg of shrimps, the nitrogen and phosphorus input amount of each hectare shrimp pond is about 600 kg and 250 kg, and except that about 27% of nitrogen and about 24% of phosphorus are converted into aquatic products, the rest of nitrogen and phosphorus are all discharged to the external environment along with discharged water or deposited at the bottom of the pond. In recent years, the research and application of healthy culture facilities and systems for penaeus vannamei boone developed at home and abroad mainly comprise a greenhouse cement pond circulating water culture system consisting of a greenhouse culture pond, a precipitation and pollution discharge pond, a circulating soil pond, a filter pond, a seawater reservoir, a deep fresh water well and the like, and a closed comprehensive culture system for penaeus vannamei boone pond with optimized biological collocation structure as the key point; the system comprises a high-level pond culture facility system for the penaeus vannamei boone with the emphasis on rapid pollution discharge, a runway type penaeus vannamei boone culture system in the United states, a sectional type culture system and the like. These facilities have certain effects of improving the culture yield of penaeus vannamei boone, improving the culture effect, reducing the discharge of culture pollutants and the like, but have many problems in terms of the operability of the system and the stability of the culture environment.
Meanwhile, when the industry is rapidly developed, the problems of blind positioning of culture capacity, hypodynamia in culture environment regulation and control and the like are increasingly highlighted, and particularly, a technical method which can be widely popularized is not available for treating pollutants in a culture pond, so that the culture success rate is reduced year by year. In the pond culture process of the penaeus vannamei boone, most ponds can not discharge water, and pollutants such as residual baits, excrement and the like are accumulated and can not be transferred in time, so that harmful environmental factors such as ammonia nitrogen, nitrite and the like in a water body are increased, conditioned pathogenic bacteria such as vibrios and the like are bred in a large quantity, harmful algae are bred, and the outbreak of scale diseases is caused. However, the conventional penaeus vannamei farming ponds generally do not specially treat the wastewater containing farming pollutants, and the wastewater is allowed to accumulate in the whole water body, thereby seriously harming the farming of the penaeus vannamei. Therefore, a new method suitable for energy conservation, emission reduction and effective pollution discharge in the industrial litopenaeus vannamei breeding process is needed to solve the problems in the prior art.
In summary, the problems of the prior art are as follows:
(1) the existing breeding mode has the problems of energy consumption, water consumption and serious pollution, and the development of the breeding industry of the penaeus vannamei boone is seriously restricted.
(2) The existing energy-saving emission-reducing facility system has certain effects of improving the culture yield of the penaeus vannamei boone, improving the culture effect, reducing the discharge of culture pollutants and the like, but has a lot of problems in the aspects of system operability and the stability of the culture environment.
(3) The traditional penaeus vannamei boone culture pond does not specially treat the wastewater containing culture pollutants, and the wastewater is allowed to accumulate in the whole water body, thereby seriously harming the culture of the penaeus vannamei boone.
The difficulty of solving the technical problems is as follows:
(1) the design of the culture facilities is unreasonable. The aquaculture water body of many farms can't form rotatory collection dirt through design, the reasonable nanotube oxygenation of breed pond shape arranges, and the blowdown effect is not good, only solves the blowdown problem through changing a large amount of water.
(2) The temperature of the water body is required to rise after a large amount of water is changed in winter, and the larger the water change amount is, the higher the temperature rise energy consumption is. The problem of reducing energy consumption can not be solved without solving the problem of water change
(3) The existing sewage discharge pipeline is only provided with bottom sewage discharge, and impurities and sewage on the surface layer of a water body cannot be discharged, so that the sewage discharge is not in place.
(4) The cultivation mode is solidified, most of farmers adopt old concepts and old methods for cultivation, and lack innovation consciousness
The significance of solving the technical problems is as follows:
(1) the effect of sufficient blowdown can be reached through a small amount of drainage, very big water conservation, through the further energy consumption that has reduced of water conservation again.
(2) The cultivation density at different stages is improved, the centralized management is realized, the yield is improved, and the labor cost is saved.
(3) The three-section cultivation shortens the cultivation period to 70-80 days, shortens about 20 days compared with the traditional cultivation mode cultivation period of 90-100 days, reduces the cultivation cost and the cultivation risk, and improves the cultivation survival rate.
(4) The secondary seedling separation technology solves the problem of adverse effect on prawn bodies caused by gradual accumulation of negative indexes of water bodies in the middle and later periods of prawns, and improves the success rate and the survival rate of the prawns.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an industrial litopenaeus vannamei breeding method, a pollution discharge method and a pollution discharge system.
The invention is realized in such a way, and provides an industrial litopenaeus vannamei culture method, which comprises the following steps:
the first step, the first stage of shrimp larvae of the penaeus vannamei boone is subjected to rough cultivation, and the stocking density is 3000 tails/square water body-4000 tails/square water body; multiple production practices and tests prove that the density can fully save a culture pond and culture water and does not influence the growth vigor of the prawns. Too high density can lead to slow growth of prawns, and too low density wastes resources.
The second step, the second stage of the penaeus vannamei boone breeding is carried out, the penaeus vannamei boone is separated into ponds, and the density of the seedlings is 1500 tails/square water body after the separation; with the increase of the individual of the prawns, the occupation of the water body space is larger and larger, and the density of the prawns put in the water body space at the stage is also the best balance on the growth vigor and the resource occupation of the prawns.
And thirdly, culturing the penaeus vannamei boone in a third section, and putting the penaeus vannamei boone in separate ponds, wherein the seedling density is 700 tails/square water body-800 tails/square water body. Likewise, shrimp individuals grow larger and require further reductions in density to strike a balance between growth and resource usage.
Further, the first section of the first Penaeus vannamei Boone is roughly cultured to reach 1000/jin to 1200/jin.
Furthermore, the second section of the penaeus vannamei bred in the second penaeus vannamei fry reaches 200/jin to 300/jin.
And further, the third stage of prawn cultivation is carried out for thirty days, and the prawn can be sold.
Another object of the present invention is to provide a method for discharging sewage used in the industrial method for culturing penaeus vannamei boone, wherein the method for discharging sewage comprises:
firstly, an indoor shrimp culture pond is square with round corners;
secondly, fixing the nano disc along four sides of the tank body in a mode of covering a right head fillet of the tank side and keeping a distance of 1 meter from a left head fillet of the tank side;
thirdly, using a sewage pipe with an upper sewage outlet and a lower sewage outlet;
fourthly, discharging the tail water to an outer pond, precipitating, filtering, and solving organic matters and phytoplankton in the water body through shellfish and filter-feeding fishes; the water is adjusted and the bottom is changed by using the bacillus, the lactobacillus and other composite beneficial bacteria, and the water body indexes are discharged to a drainage channel for discharge after being detected to be qualified.
Further, the side length of the indoor shrimp pond in the first step is designed to be 6 meters, and a fillet of 145 degrees is formed.
Further, the nano disc in the second step is designed to be 10 cm higher than the pond.
Further, the sewage draining pipe in the third step is divided into two parts: an upper drain outlet and a lower drain outlet.
Furthermore, the opening at the top of the upper drainage port is positioned at the height of the culture water level, the opening length is 30 centimeters, the opening is a long inclined strip-shaped opening, and impurities floating on the top of the water body are effectively discharged through the upper drainage port during drainage; the top opening of the lower sewage outlet is 40 cm away from the bottom of the pipe and is also a long oblique strip opening; the bottom sewage is concentrated near the sewage discharge pipe through the water transfer by the oxygenation of the nano tube, and the bottom sewage is discharged out of the culture pond during the drainage.
Another object of the present invention is to provide a soil exhaust system implementing the soil exhaust method, the soil exhaust system including: a culture pond, a sewage discharge pipeline and an oxygenation system.
The culture pond is designed to be a square with the side length of 6 meters and a fillet of 145 degrees, the bottom of the culture pond is designed to be a 15-degree pot bottom, the sewage discharge pipe is arranged at the center of the pond, and the sewage discharge pipeline is buried at the bottom of the pond. The nanotube design is respectively one around following the pool wall bottom, and every is 5 meters long, covers pond right-hand member fillet, apart from left end fillet one meter, and the blow off pipe design is two drain from top to bottom, has changed traditional blowdown port design that punches, changes into the rectangular shape drain of inclining.
The nanotubes are inflated to increase oxygen, air is blown out from the nanotubes to the wall of the pond to form reverse thrust to push a water body to flow in the reverse direction of the wall of the pond, the nanotubes covering the right round corner part drive the water to flow clockwise in the right direction under the reverse action, the four nanotubes simultaneously act to form clockwise rotation of the water in the culture pond, and the rotation speed can be adjusted by controlling the inflation quantity.
Under the continuous rotation of water and cooperation bottom of a boiler type bottom of a pool, heavier aquatic impurity and filth etc. deposit gradually and gather around the blow off pipe in the middle of the bottom of a pool, lighter impurity then floats on the surface of water of the central blow off pipe upper portion in pond, through the pipe drawing blowdown, near impurity and the filth in blow off pipe bottom and top drain can be discharged fast to replaced the blowdown mode of changing water greatly and can reach good blowdown effect again.
In summary, the advantages and positive effects of the invention are: the invention is realized by the technology of secondary seedling division and three-stage cultivation. The first section has high culture density, small number of used ponds, small water discharge, low energy consumption and other various cost reductions; compared with the common culture mode, the second-stage culture mode saves 50% of culture ponds, and also saves 50% of water discharge, energy consumption and the like. Compared with the common culture mode, the three-section culture saves about 50% of water discharge and energy consumption, and can more accurately judge the quantity and weight of the prawns through twice seedling separation, thereby accurately determining various management indexes such as feeding amount and the like. The culture time of each section is not more than 30 days, the separate pond is replaced when the negative indexes of the culture water body are not fully accumulated, the culture water body environment is enabled to be better, the conditions of water quality deterioration, prawn morbidity and the like in the middle and later periods of a common culture mode are avoided, the survival rate and the success rate of the prawns are effectively improved, meanwhile, the water quality is good, the growth vigor of the prawns is faster, the culture period is shortened by 15-20 days, and practices prove that the three-section culture method plays a great role in the aspects of reducing culture risks, reducing water body emission, reducing energy consumption, improving benefits and the like. Meanwhile, the invention can realize high-density centralized management, save the water for cultivation and reduce the energy consumption of discharge and temperature rise; the influence of negative indexes accumulated in a water body for a long time on the prawn bodies is reduced by replacing the prawn culture water body environment twice, and the long-term speed and the survival rate are improved; the culture period is shortened, and energy conservation and emission reduction are realized; the seedlings can be put in advance, and the production efficiency is improved.
The method for effectively discharging the pollution in the industrial penaeus vannamei boone culture process has the advantages that ① can effectively discharge excrement, residual bait, organic impurities in a water body and the like discharged by penaeus vannamei boone in the culture process, ② can effectively reduce negative indexes of ammonia nitrogen, nitrite and the like of the culture water body, ③ can discharge impurities and dirt on the surface of the water body while discharging the dirt at the bottom of a culture pond, and ④ can improve the survival rate and the culture success rate of the cultured penaeus vannamei boone.
Drawings
Fig. 1 is a flow chart of an industrial penaeus vannamei farming method provided by the embodiment of the invention.
Fig. 2 is a flow chart of a method for discharging pollution in an industrial litopenaeus vannamei breeding method provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides an industrial method for culturing penaeus vannamei boone, and the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the industrial method for culturing penaeus vannamei boone provided by the embodiment of the invention comprises the following steps:
s101: after about 0.5 cm of shrimp seedlings enter the factory, the first-stage rough cultivation is started, the seedling density is 3000-.
S102: and starting the second-stage culture when the shrimp seedlings reach 1000-.
S103: the third section of cultivation is started when the number of the prawns reaches 200 plus 300 per jin, the seedling density is set at 700 plus 800 per square of water after the pond division, and the cultivation is sold in the market in about thirty days.
The method for discharging the sewage in the industrial litopenaeus vannamei culture method provided by the embodiment of the invention is realized by combining three systems of culture pond shape design, sewage discharge pipeline design and oxygen increasing system design.
As shown in fig. 2, the method for discharging the pollution in the industrial method for culturing penaeus vannamei boone provided by the embodiment of the invention comprises the following steps:
s201: the indoor shrimp culture pond is designed into a square with a round angle, the side length is designed into 6 meters, and the round angle is 145 degrees.
S202: the nano-disc is designed to be fixed along four sides of the pool body and 10 centimeters higher than the pool ground, bottom sewage is promoted, the right first round angle of the pool side is covered in a placing mode, the distance from the left first round angle of the pool side is 1 meter, the water body can effectively rotate clockwise after oxygenation, and impurities in water are driven to rotate to the central sewage discharge port at the pool bottom.
S203: the novel blow off pipe that possesses drain from top to bottom of design. The blow off pipe is divided into two parts: an upper drain outlet and a lower drain outlet. The opening position of the top of the upper drainage port is at the height of the culture water level (about 1 m), the opening length is 30 cm, the opening is not in a common round hole shape but is a long oblique strip-shaped opening, and impurities floating on the top of the water body are effectively discharged through the upper drainage port during drainage. The top opening of the lower sewage outlet is 40 cm away from the bottom of the pipe and is also a long oblique strip opening, the bottom sewage is concentrated near the sewage outlet pipe through the oxygenation and water transfer of the nano pipe at ordinary times, and the bottom sewage is quickly discharged out of the culture pond during drainage.
S204: discharging the tail water to an external pond, precipitating and filtering, and solving organic matters and phytoplankton in the water body through shellfish and filter-feeding fishes; the water is adjusted and the bottom is changed by using the bacillus, the lactobacillus and other composite beneficial bacteria, and the water body indexes are discharged to a drainage channel for discharge after being detected to be qualified.
The technical effects of the present invention will be described in detail with reference to experiments.
120 thousands of penaeus vannamei larvae of 0.5 centimeter are fed in 2 months and 22 days in 2019, and are placed in 10 ponds for the first-stage standard rough culture. (12 thousands of seedlings are put in each pool, 4000 seedlings are put in each water body), 6 pools are reduced in the stage compared with the common culture method, 50% of resources such as water consumption and energy consumption are saved, after 22 days of culture, 3 months and 16 days of shrimp seedlings are sampled and weighed as 1080 seedlings/jin, first seedling division is carried out, the seedling division density is 45000 seedlings per pool, namely 1500 seedlings per square water body. The survival rate of the first section of the shrimp larvae is 90 percent, the emergence of 108 thousands of shrimps is carried out, and 24 pools are separated. Compared with the common culture method, the water and energy consumption are saved by 50 percent in the stage, the shrimp seeds are cultured in the middle of the second stage for 25 days, the shrimp seeds are sampled and weighed to be 180 tails/jin in 4 months and are separated for the second time, the density of the separated seedlings is 700 tails/jin, 49 ponds are separated, the third stage culture period is carried out, after 24 days of culture, the shrimp output time of the first batch is 5 months and 4 days, the shrimp body specification is 35 tails/jin, all the shrimp bodies are output in 5 months and 15 days, the culture period is 82 days, the maximum yield is 30 tails/jin, the water change amount is reduced by 50 percent, 30000 square waters are saved, the heating energy consumption capital is saved by about sixty thousand yuan, the culture survival rate reaches 90 percent, and the practical production proves that the method has obvious effects on the aspects of high density, short period, low consumption, high yield and the like of the penaeus vannamei.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An industrial penaeus vannamei farming method is characterized by comprising the following steps:
the first step, the first stage of shrimp larvae of the penaeus vannamei boone is subjected to rough cultivation, and the stocking density is 3000 tails/square water body-4000 tails/square water body;
the second step, the second stage of the penaeus vannamei boone breeding is carried out, the penaeus vannamei boone is separated into ponds, and the density of the seedlings is 1500 tails/square water body after the separation;
and thirdly, culturing the penaeus vannamei boone in a third section, and putting the penaeus vannamei boone in separate ponds, wherein the seedling density is 700 tails/square water body-800 tails/square water body.
2. The industrial penaeus vannamei farming method according to claim 1, wherein the first stage of the second stage.
3. The industrial penaeus vannamei farming method according to claim 1, wherein the second stage of the young penaeus vannamei farming of the second stage of the penaeus vannamei farming reaches 200/jin to 300/jin.
4. The industrial penaeus vannamei farming method according to claim 1, wherein the third stage of penaeus vannamei farming is sold for thirty days.
5. A pollution discharge method used in the industrial penaeus vannamei farming method according to any one of claims 1 to 4, wherein the pollution discharge method comprises the following steps:
firstly, an indoor shrimp culture pond is square with round corners;
secondly, fixing the nano disc along four sides of the tank body in a mode of covering a right head fillet of the tank side and keeping a distance of 1 meter from a left head fillet of the tank side;
thirdly, using a sewage pipe with an upper sewage outlet and a lower sewage outlet;
fourthly, discharging the tail water to an outer pond, precipitating, filtering, and solving organic matters and phytoplankton in the water body through shellfish and filter-feeding fishes; the water is adjusted and the bottom is changed by using the bacillus, the lactobacillus and other composite beneficial bacteria, and the water body indexes are discharged to a drainage channel for discharge after being detected to be qualified.
6. A method for discharging sewage as claimed in claim 5, wherein the side length of the indoor shrimp pond in the first step is designed to be 6 m with a round angle of 145 degrees.
7. A method of exhausting sewage as claimed in claim 5, wherein the nano-discs are designed to be 10 cm higher than the ground of the pond in the second step.
8. A method of sewerage according to claim 5, characterized in that in the third step the sewerage pipe is divided into two parts: an upper drain outlet and a lower drain outlet.
9. The sewage discharging method according to claim 8, wherein the opening at the top of the upper sewage discharging port is positioned at the height of the culture water level, the opening length is 30 cm, the opening is a long oblique strip type opening, and impurities floating at the top of the water body are effectively discharged through the upper sewage discharging port during water discharging; the top opening of the lower sewage outlet is 40 cm away from the bottom of the pipe and is also a long oblique strip opening; the bottom sewage is concentrated near the sewage discharge pipe through the water transfer by the oxygenation of the nano tube, and the bottom sewage is discharged out of the culture pond during the drainage.
10. An exhaust system for implementing the exhaust method according to claim 5, wherein the exhaust system comprises: a culture pond, a sewage discharge pipeline and an oxygenation system.
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