15 results about "Fresh water fish" patented technology

The utility model discloses a granulator for processing freshwater fish feed, which belongs to the technical field of granulation equipment, and comprises fixed rods fixedly arranged on two sides of a feed inlet, connecting rings rotatably arranged on the fixed rods, placing grooves correspondingly arranged below the connecting rings, protective films stacked in the placing grooves, and the protective films are connected with the connecting rings. One end of the protective film is connected to the bottom of the containing groove, the other end of the protective film is connected to the connecting ring, and when the connecting ring rotates to the other side of the feeding port, the protective film covers the upper portion of the feeding port.

The invention belongs to the technical field of agricultural ecological breeding, and particularly relates to a rice-fish co-culture simulation method for first season rice and ratooning rice. The rice-fish co-culture simulation method comprises the following steps: selecting a rice variety and a freshwater fish variety; a separation net and grass-proof cloth are arranged in an open-air land parcel, and a combined device with a big barrel sleeved with a small barrel is adopted; performing disinfection, seed soaking, germination accelerating and seedling raising on the rice seeds, and transplanting the seedlings into a keg; performing water and fertilizer management and tillering regulation and control after transplanting; fry are put in the booting stage of the rice, feeding, water quality regulation and control and fish disease prevention and control are implemented; applying a bud promoting fertilizer after harvesting in the first season, and promoting the regeneration tiller to germinate after rehydration; harvesting in the yellow ripening stage of ratooning rice, and fishing. By means of the modular design that the small barrels are sleeved with the large barrels, rice is planted in the independent small barrels, ratooning rice management parameters such as the stubble height, the bud promoting fertilizer application amount and the rehydration time point can be controlled in a unified mode, interference caused by soil differences and weather changes under the field condition is eliminated, and it is ensured that the conditions of all treatment units are consistent.

The utility model relates to the technical field of freshwater fish culture, and particularly discloses a fish hatching device which comprises a base, a hatching box is installed on the base, and a water collecting tank is arranged on the periphery of the hatching box. The water spraying assembly is arranged at the top of the incubator and comprises a supporting frame connected with the incubator, and the driving motor is installed on the surface of the supporting frame; the water spraying assembly comprises a water spraying pipe and a supporting seat, the water spraying pipe is fixedly connected with an output shaft of the driving motor, a water inlet end is arranged on the surface of the water spraying pipe, one end of the supporting seat is rotationally connected with the water inlet end, and the other end of the supporting seat is fixedly connected with an external water pipe. The conical part is arranged, so that sewage can be conveniently discharged when the interior of the barrel is cleaned before roe hatching, fries can be conveniently put after roe hatching, and when a water source in the hatching box is continuously increased, the water source overflows from the top of the cylinder part, so that the flowability of the water source in the hatching box is kept, and the roe hatching rate is effectively increased.

The invention discloses a method for preparing functional peptide from protein in organic wastewater produced by freshwater fish paste, which comprises the following steps: introducing carbon dioxide into the organic wastewater without large particulate matters, and adding acetic acid to obtain blended organic wastewater; adding a ferric chloride solution into the blended organic wastewater, stirring for a period of time, then adding a chitosan solution, and continuously stirring for a period of time to obtain a mixed solution; centrifuging the mixed solution, collecting a supernatant, carrying out ultrafiltration and nanofiltration on the supernatant, and collecting a cut-off liquid; pressurizing and heating the cut-off liquid, preserving heat for a period of time, releasing pressure, cooling to room temperature, and adding protease into the cut-off liquid for enzymolysis treatment; and then carrying out nanofiltration by adopting a 400Da nanofiltration membrane, and desalting to obtain the functional peptide. According to the method, the dosage of a flocculating agent can be reduced by 40-50%, the dosage of enzyme can be reduced by 30-50%, and the service life of the membrane can be prolonged to more than 5 years; peptide products with specific functions can be directionally prepared; the wastewater treatment efficiency is improved, and the COD value is reduced by more than 90%.

The utility model relates to the technical field of freshwater fish culture, and discloses a freshwater fish culture tail water filtering device which comprises a filtering tank, a water inlet is fixedly installed on the surface of the filtering tank, a guide pipe is fixedly installed on the inner wall of the filtering tank, and a circular ring is fixedly installed on the inner wall of the filtering tank. By arranging a control assembly, in the rotating process of a scraping plate, impurities on the surface of a filtering plate can be scraped away, meanwhile, when a protruding block abuts against the tangent plane of a supporting rod, the supporting rod is stressed to slide into a connecting block, and a sliding rod fixed to the surface of the supporting rod slides in an arc-shaped groove formed in the surface of a rotating rod; the rotating rod can drive the winding wheel to rotate and wind the rubber rope, and the movable ring fixed on the surface of the rubber rope can be stressed to move on the surface of the scraper under the support of the first spring, so that impurities adhered to the surface of the scraper are scraped, and the situation that the subsequent tail water filtering effect is affected due to impurity retention is avoided.

The invention discloses a method for preparing procollagen from freshwater fish. The method comprises the following steps: pressure treatment, physical crushing, mixing emulsification, homogenization, refrigeration, cleaning, extraction, homogenization, inactivation, homogenization and filtration. In the step of mixing and emulsifying, the freshwater fish tissue containing collagen is mixed with a surfactant, so that endotoxin is removed to be lower than 0.25 EU / ml. After adding an enzyme and an acid solution having a pH value of 3 to 6 to the pretreated tissue, the original collagen is extracted. According to the method, the endotoxin can be effectively reduced to be lower than 0.25 EU / ml through pretreatment of the freshwater fish tissue. According to the extraction technology disclosed by the invention, the denaturation temperature of the collagen can be increased while more original collagen is extracted and reserved, and the complete and compact triple-helix structure of the I-type original collagen is kept.

This invention discloses a flavor peptide, its preparation method, and a method for adjusting the flavor of quick-brewed fish sauce, belonging to the field of biotechnology. The flavor peptide is extracted from fermented soybean paste. The flavor peptide is used to adjust the flavor of quick-brewed fish sauce: using freshwater fish and / or its processing by-products as raw materials, processing them into a meat paste, adding enzymes for enzymatic hydrolysis, inactivating the enzymes, adding the flavor peptide, inoculating with microbial agents for fermentation, and finally filtering and sterilizing to obtain the flavor-adjusted quick-brewed fish sauce. This method significantly improves the umami and thickness of quick-brewed fish sauce and harmonizes the taste and flavor of the fish sauce.

The invention discloses a low-fishy-smell freshwater fish byproduct minced meat rice mixing sauce prepared through coordination of clove spice and hot processing, and belongs to the technical field of food processing. The freshwater fish byproduct minced meat and the natural spice clove are introduced on the basis of the traditional Chinese rice mixing sauce. By adjusting ingredients and a hot processing technology, a rice mixing sauce product with excellent taste and longer shelf life is prepared. In the rice mixing sauce taking the minced freshwater fish as a main raw material and the clove as an auxiliary material, the contents of two key fishy substances, namely (E)-2-octenal and pyridine, are remarkably reduced, so that the process can effectively inhibit the fishy smell source and reduce the negative influence of the fishy smell on the overall flavor of the product. Meanwhile, the processing method can delay the generation rate of volatile basic nitrogen, so that the storage period of the product is prolonged. The fresh and sweet flavor of aquatic products is added to the traditional rice mixing sauce, the fishy smell of the minced freshwater fish is reduced, the storage time is prolonged, and the resource waste is reduced.

The invention belongs to the technical field of polysaccharide preparation, and particularly relates to chub fishbone polysaccharide as well as a preparation method and application thereof. The method comprises the following steps: drying and crushing pretreated silver carp processing byproducts to obtain fish bone meal; then mixing and stirring with petroleum ether, degreasing and drying to obtain degreased silver carp bone meal; the preparation method comprises the following steps: dissolving degreased silver carp bone meal in water, adjusting the pH value to 4-10, adding papain, carrying out water bath heating extraction, centrifugation and rotary evaporation concentration, adding absolute ethyl alcohol, standing, centrifuging, redissolving, dialyzing and freeze-drying to obtain the silver carp bone polysaccharide. The preparation process is simple, the silver carp fishbone polysaccharide is high in purity and extraction rate, and the prepared silver carp fishbone polysaccharide has good free radical scavenging capacity and can be suitable for extraction of fishbone polysaccharide in processing by-products of grass carp and other freshwater fishes, and the utilization rate of the processing by-products of freshwater fish products is increased.

The application discloses the technical fields of freshwater culture and relates to an automatic cleaning freshwater fish culture pond, which comprises a culture pond assembly, a sewage discharge mechanism, a translation driving mechanism and a control system.

The utility model relates to fresh water fish circulating water aquaculture equipment technical field discloses an integrated circulating water aquaculture equipment for fresh water fish temporary rearing, including processing box, the inner wall front side of processing box is equipped with constant temperature circulating pool, the inner wall middle part of processing box is equipped with biological treatment pond, the inner wall rear side of processing box is provided with clean water pool, the inner wall of processing box is close to the front side and is equipped with filter pond, the inner wall fixed of filter pond is connected with circulating water pump, the output fixed of circulating water pump is connected with connecting pipe no.

The application provides a vaccine against ichthyophthiriasis and a preparation method and application thereof, and belongs to the technical field of fish disease prevention and control. The application uses inactivated whole worms of in-vitro large-scale cultured Amphilina alata as a cross antigen, and fish complement C5a protein as an immunoadjuvant, and the two synergistically play a high-efficiency immune protection role. The application mixes and emulsifies the C5a adjuvant and the antigen at an effective dose of 1x10 4 6x10 4 per tail to prepare the vaccine. After intraperitoneal injection and secondary boosting, the vaccine produces significant cross protection against the infection of the ichthyophthirius, and the protection effect is significantly better than that of a traditional Freund's adjuvant vaccine. The application breaks the bottleneck that the ichthyophthirius cannot be cultured in vitro and thus a large number of worm bodies cannot be obtained for large-scale preparation of whole worm vaccines, and also solves the problem of poor safety of traditional adjuvants, has the advantages of low cost, good effect, easy large-scale production and the like, and is suitable for green immune prevention and control of ichthyophthiriasis of freshwater fish.

The utility model discloses a freshwater fish fry hatching device which comprises a breeding tank mechanism, a breeding cage mechanism and a running water mechanism, a first connecting pipe and a second connecting pipe are arranged at the two ends of a water purifier respectively, the first connecting pipe is communicated with a discharge pipe through a second pipeline pump, and the second connecting pipe is communicated with a first pipeline pump and an absorption pipe. The absorption connecting end and the discharging connecting end are communicated with the breeding cavity through connecting through grooves in the two sides of the breeding tank body respectively, a first pipeline pump is arranged between the second connecting pipe and the absorption pipe, and a second pipeline pump is arranged between the first connecting pipe and the discharging pipe. The first pipeline pump and the second pipeline pump are started to suck water in the breeding chamber from the absorption connecting end, and the water sequentially passes through the absorption pipe, the second connecting pipe, the first connecting pipe and the discharge pipe and finally passes through the discharge connecting end to enter the breeding chamber, so that simulation of flowing water in rivers and streams can be realized, and real flowing water breeding is realized; the hatchability of the fries can be improved.

The application relates to the field of water product muscle quality regulation. A method for improving fish muscle quality by regulating the intestinal microenvironment of a neuroendocrine system, characterized by comprising the following steps: 1) after sterilizing the temporary culture pond, injecting aeration water to 2 / 3 of the height of the temporary culture pond, adjusting the dissolved oxygen in the water to 5.0-8.0 mg / L by using an oxygenator, maintaining the water temperature at 16-24 DEG C, the pH value at 7.2-8.0, and the ammonia nitrogen content below 0.5 mg / L; 2) adding 50-100 mg / L of lactobacillus panis MN047 and 20-50 mg / L of lotus node extract mixture into the water, and stirring to uniformly disperse the mixture; 3) according to the breeding density of 20-30 kg / m 3 Fresh and live freshwater fish is put into the temporary culture pond, and the fish is fasted during temporary culture; 4) temporary culture; 5) waiting in a refrigerator at-80 DEG C; 6) measurement; 7) data analysis. The method can relieve the stress reaction of fish after stress, secrete neurotransmitters, regulate intestinal microbial flora, and then relieve the deterioration of muscle quality caused by stress reaction.

The application discloses a kind of preparation method of freshwater fish fish round, belong to food processing technical field, it includes the following steps: freshwater fish is scaled, is taken out viscera, is washed and is divided;Take fish meat 7500g, corn starch 1500g, gourmet powder 190g, chicken essence 90g, edible salt 230g, egg white 1200g, ginger juice 450g, green onion 300g, cooking wine 150g, green onion oil 600g;Fish meat and auxiliary materials are put into vacuum tumbling machine, and tumbling is 5-30 minutes under 0.05kPa;Fish paste is manually shaped into spherical, is put into 80-120 DEG C oil pot, and is placed for 1 minute, and is placed for 1 minute after turning over, is stirred and turned over to ping pong ball shape with strainer, and is taken out and is drained.Oil is raised at low temperature in the application, can avoid burst and hot oil splashing, easy to operate, without adding leavening powder and other aids, keep fish round natural flavor.