CN219088156U - Sunlight industrial circulating water fish culture system - Google Patents
Sunlight industrial circulating water fish culture system Download PDFInfo
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- CN219088156U CN219088156U CN202320069507.7U CN202320069507U CN219088156U CN 219088156 U CN219088156 U CN 219088156U CN 202320069507 U CN202320069507 U CN 202320069507U CN 219088156 U CN219088156 U CN 219088156U
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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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model provides a sunlight factory-like circulating water fish culture system, which belongs to the technical field of aquaculture, and comprises a fish culture pond and a fiber turntable filter system; the fiber rotary disc filter system can remove large-particle-size particles in the aquaculture water and regularly collect microalgae, and the treated water quality reaches the fishery aquaculture standard, and 97% of aquaculture water can be directly recycled. In the utility model, in the in-situ culture process of the microalgae and the fish, the microalgae can be used for breathing CO in the fish 2 The nutrient components such as nitrogen, phosphorus and the like in the culture water body are converted into substances of the algae cellsSuch as protein, polysaccharide, vitamins, lipid and the like, and releases oxygen to quickly improve the culture water quality; microalgae and fish in-situ cultivation plays the advantage of high photosynthetic efficiency of the microalgae, and the microalgae which grow rapidly provide a proper growth environment for the fish. The solar industrial circulating water fish culture system can realize high-density, high-stability and low-energy consumption circulating water fish culture.
Description
Technical Field
The utility model belongs to the technical field of aquaculture, and particularly relates to a sunlight industrial circulating water fish culture system.
Background
The aquaculture is an important component of a grain safety guarantee system in China, and provides a large amount of high-quality animal-derived proteins for the national people. The circulating water culture has the advantages of water conservation, high culture density, controllable system, uneasy influence by external environment and the like, and becomes the necessary trend of the current aquaculture industry development. Current recirculating aquaculture systems typically include processing units for precipitation, filtration, biofilter, oxygenation, tempering, sterilization, etc., wherein the biofilter is used as a core unit to convert hazardous nitrogen-containing contaminants to less toxic nitrate nitrogen by nitrification and cannot be removed completely from the aquaculture water. In order to further improve self-cleaning capability, in-situ cultivation of macroalgae, aquatic plants and cultivated varieties is carried out in recent years, and the photosynthesis of the macroalgae, aquatic plants and cultivated varieties is utilized to remove N, P and other pollutants in the cultivated water body, so that the water quality condition is effectively improved, and the reduction of CO is achieved to a certain extent 2 The purpose of the discharge. Thus, there are also new problems. For example, when the large algae and the aquatic plants are efficiently transformed into N, P, high illumination intensity is required, and the fish is favored in a relatively dark environment; for another example, the macroalgae and the aquatic plants need to be harvested periodically, so that the stability of the removal capacity of the circulating water culture system N, P is difficult to ensure.
Microalgae are unicellular algae with small volume, simple structure and rapid growth, and have the advantages of high photosynthetic efficiency, strong environmental adaptation, short multiplication time, easy integration of other engineering technologies and the like. Microalgae can synthesize NH through photosynthesis 4 + -N、NH 3 -N、NO 2 - -N、NO 3 - -N、PO 4 3- P and other inorganic forms of nitrogen and phosphorus nutrients are converted into the algal cells' own substances such as proteins, polysaccharides, fats, vitamins and nucleic acids. The microalgae cultivation and cultivation sewage treatment are combined, so that cultivation sewage purification, N, P nutrient component recovery and production of edible microalgae for fish can be realized simultaneously. As such, the sunlight factory circulating water system for in-situ cultivation of microalgae and fish is quite available.
It is well known that the composition of particulate matter in circulating water is complex, including fish manure, residual bait, etc., and the size varies widely, from centimetres to nanometres. Many particulates, if not removed in time, become smaller and even dissolved. The existing treatment method is to remove large-particle-size particles by adopting precipitation and filtering with a filter screen, and then remove small-particle-size particles by utilizing foam separation. The introduction of microalgae makes the composition of particles in the sunlight industrial circulating water fish culture system more complex, and large-particle-size particles are preferentially removed, so that the microalgae can be removed from the system only when the microalgae are harvested. Therefore, how to efficiently remove the large-grain-size particles and regularly collect the microalgae is a key for determining whether the sunlight industrial circulating water fish culture system is successful or not.
Disclosure of Invention
In view of the above, the utility model aims to provide a solar industrial circulating water fish culture system, which is a fish culture system for in-situ culture of fish and microalgae, and can realize high-density, high-stability and low-energy consumption circulating water fish culture.
In order to achieve the above object, the present utility model provides the following technical solutions:
the utility model provides a sunlight industrial circulating water fish culture system, which comprises a fish culture pond and a fiber turntable filtering system;
the fishpond comprises: the fish pond comprises a fish pond body, a water inlet and a water outlet;
the fiber rotary disc filter system comprises a first fiber rotary disc filter system and a second fiber rotary disc filter system;
the first fiber turntable system is positioned in the first filter tank; the second fiber turntable filter system is positioned in the second filter tank;
the first fiber optic rotary disc filter system includes a first fiber optic rotary disc filter;
the second fiber optic rotary disc filter system includes a second fiber optic rotary disc filter;
the filter cloth in the first fiber rotary disc filter has a filter aperture of 15-30 mu m;
the filter cloth in the second fiber rotary disc filter has a filter aperture of 1-5 mu m;
the first fiber rotary disc filtering system and the second fiber rotary disc filtering system respectively comprise a back flushing system and a matched electrical control system;
the water outlet of the fish pond is respectively communicated with the first filter pond and the second filter pond through pipelines;
the filtered water outlet of the fiber rotary disc filtering system is communicated with the water inlet of the fish pond through a pipeline.
Preferably, the first fiber rotary disc filter system and the second fiber rotary disc filter system have equal filter flux to the same culture sewage.
Preferably, a filtered water collecting tank is arranged between the first filtering tank and the second filtering tank; the bottom of the filtered water collecting tank is provided with a filtered water outlet; the first filter tank and the second filter tank are respectively provided with a sewage outlet; the first fiber rotary disk filter system and the second fiber rotary disk filter system share a filtered water collecting tank and a filtered water outlet.
Preferably, the fiber turntable filter system further comprises a sludge discharge system; the mud discharging system comprises mud discharging pipes which are respectively arranged at the bottoms of the first filtering tank and the second filtering tank, and the mud discharging pipes are communicated with the reverse suction pump through pipelines.
Preferably, the sludge discharge pipes in the first filter tank and the second filter tank are respectively provided with an electric valve; the first fiber rotary disc filter system and the second fiber rotary disc filter system share a reverse suction pump.
The utility model has the beneficial effects that: the utility model provides a sunlight industrial circulating water fish culture system, which comprises a fish culture pond and a fiber turntable filtering system; the fiber rotary disc filter system comprises a first fiber rotary disc filter system and a second fiber rotary disc filter system; the first fiber turntable system is positioned in the first filter tank; the second fiber turntable filter system is positioned in the second filter tank; the first fiber optic rotary disc filter system includes a first fiber optic rotary disc filter; the second fiber optic rotary disc filter system includes a second fiber optic rotary disc filter; the filter cloth in the first fiber rotary disc filter has a filter aperture of 15-30 mu m; the filter cloth in the second fiber rotary disc filter has a filter aperture of 1-5 μm.
During normal microalgae cultivation, a first fiber rotary disc filter with a filtering aperture of 15-30 mu m is started, and microalgae can return to a fish pond through the first fiber rotary disc filter to continue cultivation; large-particle-size particles such as fish manure, residual baits and the like are directly sunk to the bottom of the filtering tank or are intercepted by the filter cloth of the first fiber rotary disc filter, and finally discharged by a mud discharging system or a back flushing system to be further subjected to deep purification treatment. When microalgae in the culture water body need to be collected, a second fiber rotary disc filter with the filtering aperture of 1-5 mu m is started to intercept, so that the microalgae cannot return to the fish pond. In the utility model, the fiber rotary disc filter system not only can carry out filtration, but also has a precipitation function. The direct sinking of large-particle-size particles in the culture sewage effectively avoids the water quality deterioration caused by crushing, obviously reduces the sludge quantity on the filter cloth and reduces the backwashing water quantity.
According to the solar industrial circulating water fish culture system provided by the utility model, the solar industrial circulating water fish culture system can be used for carrying out solar industrial circulating water fish culture, culture sewage can selectively pass through the first fiber rotary table filter or the second fiber rotary table filter, wherein the aperture size of the filter cloth of the first fiber rotary table filter meets the requirements that microalgae can pass through, large-particle-size particles can not pass through, and the aperture size of the filter cloth of the second fiber rotary table filter meets the requirements that the microalgae can not pass through, so that the large-particle-size particles with the particle size larger than that of the filter cloth of the first fiber rotary table filter, such as fish manure and residual baits, can be quickly moved out of a fish pond, the microalgae can return to the fish pond, and the fish can be cultured in situ, and the microalgae can carry out photosynthesis on CO exhaled by the fish 2 The nutrient components such as nitrogen, phosphorus and the like dissolved in water are converted into substances of algae cells such as protein, polysaccharide, lipid, vitamin and the like, oxygen is released, the water quality of cultivation is rapidly improved, and the requirement of artificial oxygenation is remarkably reduced. In the present utility model, the aquaculture wastewater is considered as a valuable resource. The fish and the microalgae are cultured in situ in the fish pond, so that not only can the purification and nutrient component recovery of the culture sewage be realized, but also the microalgae biomass which can be directly eaten by the fish or is beneficial to the growth of the fish can be produced. In the present utility model, microalgae,The fish is cultured in situ, the advantage of high photosynthetic efficiency of the microalgae is fully exerted, and the microalgae which grow rapidly provide a proper growth environment for the fish.
In the utility model, the fiber turntable filter system rapidly removes microalgae at the end of the growth stabilization period from the fish pond, thereby avoiding water quality deterioration caused by microalgae. The filtering precision of the fiber rotary disc filtering system can reach 1 mu m, and the fiber rotary disc filtering system can intercept more than 99% of particles in the culture sewage, and the total solid content of the filtered water is lower than 2mg/L.
In the utility model, the absolute dominant microalgae can inhibit the rapid proliferation of harmful bacteria in the culture water body, obviously reduce the use of fish drugs in the culture process, and realize the real green culture; in addition, the active functional groups on the surfaces of the microalgae can promote the agglomeration of very small particles, and can eliminate tiny particle removal equipment. In the utility model, the recycling rate of the culture sewage can reach 97%, and the circulating water culture of the fish can be realized with low energy consumption and high stability.
Drawings
FIG. 1 is a top view of a fish pond in which a 1-fish pond body, a 2-water inlet, a 3-water outlet, a 4-water outlet valve, a 5-water pump, a 21-first filtration pond water inlet, a 22-second filtration pond water inlet, a 23-first filtration pond, a 24-second filtration pond, a 25-first fiber carousel filtration system, a 26-second fiber carousel filtration system, a 27-filtered water collection tank, a 28-filtered water outlet, and a 29-mating electrical control system;
FIG. 2 is a schematic diagram of a sludge discharge system of a fiber rotary disk filtration system, wherein 21-first filtration tank water inlet, 22-second filtration tank water inlet, 23-first filtration tank, 24-second filtration tank, 28-filtered water outlet, 30-soil pick-up port, 31-reverse suction pump, 32-soil pick-up tube.
Detailed Description
The utility model provides a sunlight industrial circulating water fish culture system, which comprises a fish culture pond and a fiber turntable filtering system; the fishpond comprises: the fish pond comprises a fish pond body, a water inlet and a water outlet; the fiber rotary disc filter system comprises a first fiber rotary disc filter system and a second fiber rotary disc filter system; the first fiber turntable system is positioned in the first filter tank; the second fiber turntable filter system is positioned in the second filter tank; the first fiber optic rotary disc filter system includes a first fiber optic rotary disc filter; the second fiber optic rotary disc filter system includes a second fiber optic rotary disc filter; the filter cloth in the first fiber rotary disc filter has a filter aperture of 15-30 mu m; the filter cloth in the second fiber rotary disc filter has a filter aperture of 1-5 mu m; the first fiber rotary disc filtering system and the second fiber rotary disc filtering system respectively comprise a back flushing system and a matched electrical control system; the water outlet of the fish pond is respectively communicated with the first filter pond and the second filter pond through pipelines; the filtered water outlet of the fiber rotary disc filtering system is communicated with the water inlet of the fish pond through a pipeline.
In the utility model, the sunlight industrial circulating water fish culture system comprises a fiber rotary disc filter system; the fiber rotary disc filter system comprises a first fiber rotary disc filter system and a second fiber rotary disc filter system; the first fiber turntable system is positioned in the first filter tank; the second fiber turntable filter system is positioned in the second filter tank; the first fiber optic rotary disc filter system includes a first fiber optic rotary disc filter; the second fiber optic rotary disc filter system includes a second fiber optic rotary disc filter; the filter cloth in the first fiber rotary disc filter has a filter aperture of 15-30 mu m; the filter cloth in the second fiber rotary disc filter has a filter aperture of 1-5 mu m; the first fiber rotary disc filtering system and the second fiber rotary disc filtering system respectively comprise a back flushing system and a matched electrical control system; the water outlet of the fish pond is respectively communicated with the first filter pond and the second filter pond through pipelines; the filtered water outlet of the fiber rotary disc filtering system is communicated with the water inlet of the fish pond through a pipeline.
In the utility model, the water outlet of the fish pond flows into the first filter pond or the second filter pond by gravity through a pipeline, and an electric valve is preferably arranged on the pipeline.
In the present utility model, the fiber rotary disc filter preferably includes a central drum and a rotary disc; the turntable is fixed around the central rotary drum and is communicated with the central rotary drum through a communication hole; filter cloth is arranged on two sides of the turntable; the base cloth of the filter cloth is preferably polyester fiber, and the fluff on the base cloth is preferably polyamide fiber.
In the utility model, the first fiber rotary disc filter system and the second fiber rotary disc filter system have equal filter flux on the same culture sewage so as to maintain the constant liquid level of the fish pond; the number of the turntables of the first fiber turntable filter and the second fiber turntable filter is determined according to the amount of the culture sewage to be treated.
In the present utility model, the filter cloth in the first fiber rotary disc filter has a filter pore diameter of 1 to 5 μm, preferably 1 μm; the filter cloth in the second fiber rotary disc filter has a filter pore diameter of 15-30 μm, preferably 30 μm.
In the utility model, the tank wall of the first filter tank is preferably provided with a first filter tank water inlet, and the tank wall of the second filter tank is preferably provided with a second filter tank water inlet; a filtered water collecting tank is preferably arranged between the first filtering tank and the second filtering tank, and a filtered water outlet is arranged at the bottom of the filtered water collecting tank; drain outlets are respectively arranged at the bottoms of the first filter tank and the second filter tank; the first fiber rotary disk filter system and the second fiber rotary disk filter system share a filtered water collecting tank and a filtered water outlet.
In the present utility model, the fiber optic rotary disc filtration system preferably further comprises a sludge discharge system; the mud discharging system preferably comprises mud discharging pipes which are respectively arranged at the bottoms of the first filtering tank and the second filtering tank, and the mud discharging pipes are communicated with the reverse suction pump through pipelines.
In the utility model, the mud discharging pipes in the first filtering tank and the second filtering tank are preferably respectively provided with an electric valve; the first and second fiber optic rotary disk filtration systems preferably share a counter-suction pump.
In the utility model, a filtered water outlet of the fiber rotary disc filtering system is communicated with a water inlet of the fish pond through a pipeline, and a water pump is preferably arranged on the pipeline.
In the utility model, the first fiber rotary disc filter system and the second fiber rotary disc filter system can independently operate but can not be synchronously started; and the water inlet of the first fiber rotary disc filtering system and the water inlet of the second fiber rotary disc filtering system are respectively controlled by electric valves. Starting a first fiber rotary disc filter system with a filter aperture of 15-30 mu m during microalgae cultivation, enabling microalgae to return to a fish pond through the first fiber rotary disc filter, and continuing cultivation; large-particle-size particles such as fish manure, residual baits and the like are directly sunk or intercepted by the filter cloth of the first fiber rotary disc filter and discharged through a back flushing system and a mud discharging system. When the microalgae in the culture water body need to be removed, a second fiber rotary disc filter system with the filter aperture of 1-5 mu m is started to intercept, and the microalgae are discharged through a backwashing system. After the microalgae in the water body are removed, the high-activity microalgae which are cultured in advance are added again.
In the utility model, in the filtering process of the fiber turntable filtering system, large-particle-size particles in sewage are blocked by filter cloth, clear water passes through the filter cloth and flows into the central rotary drum by gravity, and then flows out of the fiber turntable filtering system through a filtered water outlet; the filter cloth blocks large-particle-size particles, one part of the particles are adhered to the surface of the filter cloth, the other part of the particles are deposited to the bottom of the tank, the filtering resistance is increased along with the increase of the attachments on the filter cloth, the water level of the filtering tank is gradually increased, and when the water level reaches a back flushing set value, the back flushing pump is started by the matched electric control system, so that the back flushing process is started. During normal filtration, the turntable is in a static state, which is beneficial to direct sinking of the culture sewage particles.
In the utility model, in the back flushing process of the fiber rotary disc filter system, the rotary disc rotates at the speed of about 1r/min, and the matched electric control system sequentially cleans each group of rotary discs by controlling an electric valve connected to a back suction pump pipeline; the back suction pump sucks the surface of the filter cloth under negative pressure, the filter cloth is cleaned from inside to outside by clean water of the filter cloth, and the sludge gathered on the filter cloth is washed down and sequentially discharged through the back suction pump and the sewage outlet. After all turntables are cleaned, the liquid level in the filtering pool is recovered to be normal. The filtration is carried out as usual during the back flushing, and the back flushing water amount only accounts for about 1% of the filtration water amount.
In the utility model, the mud discharging system preferably comprises mud discharging pipes which are respectively arranged at the bottoms of the first filtering tank and the second filtering tank, and the mud discharging pipes are communicated with a reverse suction pump through pipelines; the mud discharging pipes in the first filtering tank and the second filtering tank are preferably provided with electric valves respectively; the reverse suction pump is preferably matched with an electrical control system, and the sludge discharge system can be started according to working conditions.
In the utility model, the sewage discharging component is used for discharging sludge.
In the utility model, the sunlight industrial circulating water fish culture system preferably further comprises a soluble pollutant removal system and a disinfection system. The utility model is not particularly limited to the soluble pollutant removing system and the sterilizing system, and the soluble pollutant removing system and the sterilizing system which are conventional in the art can be adopted; in the practice of the utility model, the disinfection system includes ozone and ultraviolet disinfection.
In the utility model, the sunlight factory-like circulating water fish culture system preferably further comprises an automatic online monitoring system, wherein the automatic online monitoring system comprises swimming behavior and ingestion state, and can ensure the influence of the safety of culture water bodies on fish; the automatic online monitoring system detects feeding behaviors, dissolved oxygen, pH, water temperature and residual chlorine in the fish pond body in real time online.
The utility model also provides a sunlight factory circulating water fish culture method based on the sunlight factory circulating water fish culture system, which comprises the following steps:
1) Injecting water into the fish pond body and adding the microalgae species which are domesticated in advance; the adding amount of the microalgae species is 50-1000 mg/L of water body;
2) Throwing fish fries, and feeding feed into the fish pond every 3-5 h;
3) In the cultivation process, when microalgae are at the end of the growth stabilization period and are about to enter into the decay period, the first fiber rotary disc filter is closed, the second fiber rotary disc filter is opened, so that the microalgae can not return to the fish pond any more, the intercepted microalgae are discharged through a backwashing system, a certain volume of high-activity microalgae which are cultivated in advance are added, the algae density in the cultivation water body is 50-1000 mg/L, and the fish is harvested after 150-200 d.
Firstly, injecting water into the fish pond body and adding the micro algae seeds which are domesticated in advance until the algae density of the culture water body is 50-1000 mg/L.
In the present utility model, the water inlet is preferably tap water, and the water inlet speed of the water inlet is preferably 60m 2 /h; in the utility model, when the water surface height in the fish pond is 15-25 cm away from the top of the fish pond, water inflow is completed; at 100m 3 For example, the fish pond body with a volume is used, and the time for completing water inflow is preferably 1-2 hours, more preferably 1.5 hours. After the water inflow is completed, microalgae which are cultured in advance are added until the algae density of the culture water body is 50-1000 mg/L, wherein the algae density is preferably 100-500 mg/L, and more preferably 200mg/L. After microalgae are added, a first fiber rotary table filtering system is started, and after the operation is carried out for 1 to 2 hours, fries are put into a fish pond. The utility model is not particularly limited to the types of the fries, and the conventional farmed fish in the field can be selected, and in the specific implementation process of the utility model, the fries comprise salmon, rainbow trout, star-fish, weever or mandarin fish. In the utility model, the throwing density of the fish fry is preferably 25-35 kg/m 3 More preferably 28 to 32kg/m 3 Most preferably 30kg/m 3 。
In the present utility model, the microalgae can pass through the filter cloth in the first fiber rotary disc filter and cannot pass through the filter cloth in the second fiber rotary disc filter.
In the utility model, the microalgae are cultivated by using the light fermentation system; taking Chlorella photo-fermentation culture as an example, 10L of Chlorella species were inoculated into a 100L fermenter containing sterilized medium, and the illumination intensity was varied from 200. Mu. Mol/(m) according to the cell density 2 S) is increased to 500. Mu. Mol/(m) 2 S) pH of the medium was 6.0, the temperature was 30℃and the stirring speed was 150r/min, the aeration rate was 200L/min, and the culture was terminated after 120 hours. The feeding method in the culture process comprises the following steps: according to the growth condition of the chlorella, adding 500g/L glucose mother liquor for a plurality of liters every 12 hours to ensure that the concentration of glucose in the culture medium is 20-25 g/L; 1mol/L concentrated nitric acid is automatically added as a nitrogen source.
In the utility model, the microalgae preferably comprise one or more of chlorella, nannochloropsis, brine alga and chlamydomonas reinhardtii. Microalgae are unicellular algae with small volume, simple structure and rapid growth and propagation, and have the advantages of high photosynthesis efficiency, strong environment adaptability, high biological yield and the like.
After the microalgae species which are domesticated in advance are added, the utility model puts in fish fries, and feeds are fed into the fish pond every 3.5-4.5 h.
In the present utility model, when the fry is salmon, the initial inflow velocity is preferably 30 to 35m when 80% or more of the weight of the individual fish is 20g 3 /h, more preferably 35m 3 Preferably, the initial inflow velocity is 35-40 m when the weight of the single fish is 100g, wherein the weight of the single fish is more than 80 percent 3 /h, more preferably 40m 3 /h; when the weight of the single fish with more than 80 percent is 200 to 500g, the initial water inflow velocity is preferably 45 to 50m 3 /h, more preferably 50m 3 /h; when the weight of the single fish above 80% is 500-2000 g, the initial water inflow velocity is preferably 50-60 m 3 /h, more preferably 60m 3 Preferably, the initial water inflow velocity is 60-70 m when the weight of the single fish with more than 80% is 2000-3500 g 3 /h, more preferably 70m 3 And/h. When the fries are fingerlings, the initial inflow velocity control is preferably 28-32 m 3 /h, more preferably 30m 3 Preferably, the initial water outlet flow rate is 28-32 m 3 /h，30m 3 And/h. In the utility model, along with the growth of the cultured fish fries, different water inflow and outflow flow rates are set according to the density of the cultured fish bodies, and when the culture density in the water bodies is more than or equal to 30kg/m 3 And less than 60kg/m 3 When the water inflow and the water outflow are respectively set to be 35-45 m 3 Preferably from 38 to 42m 3 /h, more preferably 40m 3 /h; when the culture density in the water body is more than or equal to 60kg/m 3 And less than 100kg/m 3 When the water inflow and the water outflow are respectively set to 55-65 m 3 Preferably 58 to 62m 3 /h, more preferably 60m 3 /h; when the culture density in the water body is more than or equal to 100kg/m 3 And less than 200kg/m 3 When the water inflow and the water outflow are respectively set to 70-90 m 3 Preferably 75 to 85m 3 /h, more preferably 80m 3 /h。
In the utility model, when the culture density in the water body is more than or equal to 30kg/m 3 And less than 60kg/m 3 When the water inflow and the water outflow are respectively set to be 35-45 m 3 /h; when the culture density in the water body is more than or equal to 60kg/m 3 And less than 100kg/m 3 When the water inflow and the water outflow are respectively set to 55-65 m 3 /h; when the culture density in the water body is more than or equal to 100kg/m 3 And less than 200kg/m 3 When the water inflow and the water outflow are set to be 70-90 m 3 /h。
In the utility model, the dissolved oxygen amount in the culture water body is 5-12 mg/L in the culture process.
In the present utility model, the feed is preferably fed to the fish pond every 4 hours. In the utility model, when the weight of a single fish is 30-50 g, the feeding amount of the feed is preferably 2.5-3% of the total weight of the fish in the culture water body; the adding amount of the algae is preferably 800-1200L/100 m 3 A body of water; when the weight of a single fish is 200-500 g, the feeding amount of the feed is preferably 2% -2.5% of the total weight of the fish in the culture water body.
In the cultivation process, when microalgae are at the end of the growth stabilization period and are about to enter into the decay period, the first fiber rotary disc filter is closed, the second fiber rotary disc filter is opened, so that the microalgae can not return to the fish pond any more, the intercepted microalgae are discharged through a backwashing system, a certain volume of high-activity microalgae which are cultivated in advance are added, the algae density in the cultivation water body is 50-1000 mg/L, and the fish is harvested after 150-200 d.
In the utility model, the microalgae is added with multiple effects, on one hand, the microalgae can effectively remove nitrogen, phosphorus and other soluble pollutants in the water body, and after the microalgae is added, the microalgae can take the nitrogen, phosphorus and other soluble pollutants in the water body as nutrient substances to realize the growth and propagation of the microalgae in the water body; on the other hand, the growth and propagation of the microalgae can release oxygen, and the released oxygen can be used by fish in the water body, so that the demand of artificial oxygenation is reduced. Furthermore, the chlorella also has an inhibiting effect, can inhibit the growth of harmful bacteria in the water body, maintain the water body environment and prevent fish in the water body from infecting the harmful bacteria; in addition, the microalgae added into the water body can also be used as fish feed for fish to eat; meanwhile, the polysaccharide generated on the surface of the microalgae can agglomerate and wrap nearby water-insoluble particle pollutants, so that the particle size of the particles can be increased, the sedimentation of the particle pollutants is further promoted, and the rapid separation of the particle pollutants is facilitated.
In the cultivation process, oxygenation is carried out to the fish and algae cultivation system through the oxygenation cone, and whether oxygenation is needed or not is determined according to the concentration of dissolved oxygen; the dissolved oxygen of the fish algae cultivation system is kept above 7.0 mg/L; oxygenation is carried out when the dissolved oxygen of the fish culture system is 7.0mg/L lower.
The utility model is harvested after 150-200 days of fish culture. In the utility model, when the fish is rainbow trout, the weight of the put-in fry is 4.5-5.5 g, and the fish is harvested after 170-190 d of cultivation, and the weight of the harvested rainbow trout is 450-550 g. When the fish is salmon, the weight of the put-in fry is 4.5-5.5 g, and the weight of the harvested salmon is 2000-3600 g.
In the utility model, the industrial fish algae circulating water culture is carried out by utilizing the culture system, and microalgae are periodically added into the fish algae culture system in the culture process, and the microalgae are used for adding CO in water 2 The nutrient components such as nitrogen, phosphorus and the like are converted into algae cells to be converted into substances, the water quality in the fish pond is purified, and particulate matters, macromolecular proteins, algae, bacteria, viruses and the like in the cultured water body are fully removed by utilizing the fiber rotary disc filter system, so that the recycling of the cultured sewage is realized, and the sewage discharge amount is zero; can truly realize the circulating water culture with high density, high stability and low energy consumption.
The technical solutions provided by the present utility model are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present utility model.
Example 1
A sunlight factory circulating water fish culture system is shown in a figure 1, wherein a fish culture pond structure comprises a 1-fish pond body, a 2-water inlet, a 3-water outlet, a 4-water outlet valve, a 5-water pump, a 21-first filter pond water inlet, a 22-second filter pond water inlet, a 23-first filter pond, a 24-second filter pond, a 25-first fiber turntable filter system, a 26-second fiber turntable filter system, a 27-filtered water collecting tank, a 28-filtered water outlet and a 29-matched electrical control system.
A schematic diagram of a mud discharging system of the fiber rotary disc filter system is shown in fig. 2, wherein a water inlet of a 21-first filter tank, a water inlet of a 22-second filter tank, a 23-first filter tank, a 24-second filter tank, a 28-filtered water outlet, a 30-dirt sucking port, a 31-reverse suction pump and a 32-dirt sucking pipe are arranged;
the method for cultivating fish by utilizing the sunlight industrial circulating water fish cultivating system in the embodiment 1 comprises the following steps:
the feeding is generally performed 3 times under normal conditions, 8 a.m., 1 m.p. and 6 m.p. in the morning. For salmon, the water temperature is controlled between 14 and 18 ℃ and the ingestion capability of the salmon is good.
TABLE 1 data of fish farming using the solar industrialized circulating water fish farming system of the present embodiment
Comparison experiment:
conventional fish ponds: pond culture, cement pond culture and cage culture.
The cultivation method comprises the following steps: the conventional cultivation is fed for 2 times a day, the water temperature is uncontrollable, and the water temperature is changed according to the weather state.
TABLE 2 data for conventional fish pond farmed fish
The single weight and the density of the fish cultured by the sunlight industrial circulating water fish culture system provided by the utility model are obviously larger than those of the conventional fish cultured by the sunlight industrial circulating water fish culture system.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (5)
1. A solar industrial circulating water fish culture system is characterized by comprising a fish culture pond and a fiber turntable filtering system;
the fishpond comprises: the fish pond comprises a fish pond body, a water inlet and a water outlet;
the fiber rotary disc filter system comprises a first fiber rotary disc filter system and a second fiber rotary disc filter system;
the first fiber turntable filter system is positioned in the first filter tank; the second fiber turntable filter system is positioned in the second filter tank;
the first fiber optic rotary disc filter system includes a first fiber optic rotary disc filter;
the second fiber optic rotary disc filter system includes a second fiber optic rotary disc filter;
the filter cloth in the first fiber rotary disc filter has a filter aperture of 15-30 mu m;
the filter cloth in the second fiber rotary disc filter has a filter aperture of 1-5 mu m;
the first fiber rotary disc filtering system and the second fiber rotary disc filtering system respectively comprise a back flushing system and a matched electrical control system;
the water outlet of the fish pond is respectively communicated with the first filter pond and the second filter pond through pipelines;
the filtered water outlet of the fiber rotary disc filtering system is communicated with the water inlet of the fish pond through a pipeline.
2. The solar industrialized circulating water fish farming system of claim 1, wherein the first fiber carousel filtration system and the second fiber carousel filtration system have equal filtration flux for the same aquaculture wastewater.
3. The solar industrialized circulating water fish farming system of claim 1 or 2, wherein a filtered water collection tank is provided between the first and second filter tanks; the bottom of the filtered water collecting tank is provided with a filtered water outlet; the first filter tank and the second filter tank are respectively provided with a sewage outlet; the first fiber rotary disk filter system and the second fiber rotary disk filter system share a filtered water collecting tank and a filtered water outlet.
4. The solar industrialized circulating water fish farming system of claim 1, wherein the fiber carousel filtration system further comprises a mud drainage system; the mud discharging system comprises mud discharging pipes which are respectively arranged at the bottoms of the first filtering tank and the second filtering tank, and the mud discharging pipes are communicated with the reverse suction pump through pipelines.
5. The solar industrial circulating water fish farming system of claim 4, wherein the sludge discharge pipes in the first and second filter tanks are respectively provided with an electric valve; the first fiber rotary disc filter system and the second fiber rotary disc filter system share a reverse suction pump.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115812661A (en) * | 2023-01-10 | 2023-03-21 | 青海光子生态有限公司 | Sunlight industrial circulating water fish culture system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115812661A (en) * | 2023-01-10 | 2023-03-21 | 青海光子生态有限公司 | Sunlight industrial circulating water fish culture system and method |
| CN115812661B (en) * | 2023-01-10 | 2025-07-04 | 青海光子生态有限公司 | A solar-powered industrialized circulating water fish farming system and method |
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