306 results about "Mariculture" patented technology

The invention provides a comprehensive and intelligent mariculture net cage management and control system. The system integrates a multi-parameter sensor module, an underwater robot module, an underwater camera module, a central control module, a data storage and analysis module, an early warning module, a remote communication module and an automatic execution module. By monitoring multiple environmental parameters such as water temperature, salinity, dissolved oxygen and the like in real time and utilizing the underwater robot and the underwater camera to carry out autonomous inspection and fish behavior observation, the system can accurately master the culture environment condition. The AI algorithm and the intelligent model are combined, the system dynamically adjusts the bait casting amount, the oxygenation frequency and the net cage position, and the breeding benefits are effectively improved. Meanwhile, the early warning module carries out graded early warning on risk events such as typhoon and diseases, and the breeding safety is ensured. The remote communication and visual human-computer interface further enhances the remote monitoring and management capability of the system.

The invention provides an ocean net cage unmanned ship intelligent inspection method based on multi-source data and environment perception, which comprises the following steps: collecting and preprocessing multi-source ocean environment data of an ocean net cage group area, and simultaneously obtaining net cage distribution information, net cage inspection task requirements and an initial state of each unmanned ship; predicting the number of unmanned ships by using an improved random forest model; adopting an improved genetic algorithm to generate a plurality of optimal inspection paths; intelligently distributing a plurality of optimal routing inspection paths to each unmanned ship, and performing routing inspection on each unmanned ship according to the distributed path; multi-source marine environment data collected by a fixed monitoring station deployed in a net cage group area and a sensor of the unmanned ship can be comprehensively utilized, unmanned ship inspection path pre-planning, intelligent task allocation and dynamic adjustment of the inspection process are achieved, and therefore the inspection efficiency is improved, inspection safety is guaranteed, resource allocation is optimized, and the cost is reduced. And the intelligent level of mariculture management is improved.

The invention discloses a gravity type submerging net cage parameter design optimization method, and relates to the field of mariculture equipment structure optimization, and the method comprises the steps: collecting the multi-period marine environment data of a target sea area, and constructing an environment load sequence with a time-varying characteristic; establishing a three-dimensional coupling finite element model, performing disturbance analysis on a plurality of structure control parameters, and identifying a key design parameter set based on a response sensitivity function; and constructing a multi-objective optimization model including floating and sinking time control, maximum stress minimization and attitude offset constraint, performing global optimization by adopting an adaptive genetic algorithm, obtaining an optimal parameter solution, substituting the optimal parameter solution into the simulation model for dynamic response verification, and if a response index is converged to a target interval, outputting the optimal parameter solution as final design configuration. According to the method, systematic optimization of structural parameters of the submerging and surfacing net cage can be achieved, the stability and safety of the submerging and surfacing net cage under complex sea conditions are improved, and the method has high engineering applicability.

The invention provides a salt-tolerant plant constructed wetland system for treating eutrophicated mariculture wastewater, which specifically comprises a lower filler formed by mineral materials, and a middle filler formed by modified zeolite, sodium alginate coated vermiculite, rice husk charcoal, oyster shell, coral sand and diatomite, the surface filler is composed of intertidal zone bottom mud, intertidal zone raw water, coastal saline-alkali soil and composite algae powder, and the three fillers are combined with salt-tolerant plant breeding, bow-shaped water flow optimization and layered collaborative design; the core problems of poor salt tolerance, low adsorption efficiency, easiness in blockage, high maintenance cost and the like of the traditional constructed wetland during treatment of the mariculture wastewater are systematically solved.

The invention relates to the technical field of mariculture, and discloses mariculture equipment and an offshore wind power system.The mariculture equipment comprises a mounting frame, a net cage and a lifting assembly, a containing cavity is formed in the mounting frame, an opening is formed in the top of the mounting frame, the bottom of the mounting frame is suitable for being arranged in water, and the top of the mounting frame is exposed out of the water surface; one end of the lifting assembly is fixed to the mounting frame, the other end of the lifting assembly is connected with the net cage, and the lifting assembly has a first state for driving the top of the net cage to sink into the sea and a second state for driving the net cage to float out of the sea surface. The distance between the top of the net cage and the average sea level exceeds the maximum wave height, the impact of stormy waves on the net cage can be reduced, the net cage is prevented from being damaged, and after the typhoon is finished, the net cage is driven to restore the original position through the lifting assembly and lifted to the second state of floating out of the water surface through the lifting assembly so that the net cage can be maintained conveniently.

The invention discloses a method for preparing activated carbon from mariculture bottom mud doped with biomass and application. The preparation method of the activated carbon comprises the following steps: desalting the mariculture bottom mud to obtain low-salt bottom mud particles; uniformly mixing the low-salt sediment particles with biomass powder according to a ratio of 1: (3-5), and carrying out pyrolysis carbonization at 350-450 DEG C in a nitrogen atmosphere to obtain a pre-carbonized biomass material; and uniformly mixing the pre-carbonized biomass material and an activator according to a mass ratio of 1: (4-5), placing the mixture in a ball milling tank, carrying out mechanochemical ball milling, transferring the ball-milled mixture to a tubular furnace, and carrying out high-temperature activation at 800-1000 DEG C in a nitrogen atmosphere to obtain the activated carbon. The material has a hierarchical porous structure and a relatively high specific surface area, can adsorb and remove various pollutants, particularly has relatively high adsorption capacity for VOCs and CO2, can be produced in batches, is low in cost, wide in applicable temperature range and long in service life, and has a good application prospect.

The invention provides a transporting device for a plastic fishing raft and an operation method of the transporting device. The transporting device comprises a plastic fishing raft body. The rail assembly is fixedly installed on a walkway plate of the plastic fishing raft body through a rail fixing frame, the rail assembly comprises a cross rail and a linear rail which are installed in a crossed mode, and a positioning groove and a climbing block are arranged at the crossed position; the cargo carrying assembly comprises a conveying frame, a handrail and a cargo body, the cargo carrying assembly is movably installed on the rail assembly through a power assembly, the power assembly comprises driving motors symmetrically arranged at the front end and the rear end of the bottom of the conveying frame, and each driving motor drives wheels on a wheel shaft to rotate through a driving gear; the treads of the wheels are matched with the track contact surfaces, and the rims of the wheels are matched with the side edges of the track assembly. The mechanical level of mariculture operation is remarkably improved, and the problems that traditional manual carrying is low in efficiency and poor in safety are solved.

The invention discloses a marine streptomyces strain SHEa3, a compound derived from the marine streptomyces strain SHEa3 and application of the marine streptomyces strain SHEa3, the classification name of the marine streptomyces strain SHEa3 is Streptomyces sp, the preservation number of the marine streptomyces strain SHEa3 is GDMCC No: 66667, and the preservation date of the marine streptomyces strain SHEa3 is July 14, 2025. The invention also discloses a sesquiterpenoids compound streptaviol A derived from marine streptomyces and application of the sesquiterpenoids compound streptaviol A in preparation of drugs for preventing and treating vibrio diseases of mariculture animals. The invention further discloses application of the sesquiterpenoids, namely the sea threitol C, derived from the marine streptomyces in preparation of drugs for preventing and treating vibrio diseases of mariculture animals. The marine streptomyces source compound has efficient anti-vibrio activity, and the marine streptomyces source compound streptaviol A and the helithreitol C are used for preparing the medicine for preventing and treating vibrio diseases of mariculture animals, so that the side effect is low, and the activity is excellent.

The utility model relates to the technical field of mariculture, in particular to an independent lifting aquaculture net cage convenient to tow. An independent lifting aquaculture net cage convenient to tow comprises at least one aquaculture net cage module, each aquaculture net cage module comprises a buoyancy truss, at least two net cage frame bodies and a plurality of pile legs, and each buoyancy truss comprises a plurality of first buoyancy frame bodies and at least one second buoyancy frame body; the multiple first buoyancy frame bodies are connected end to end to define a closed structure with an inner space. And the second buoyancy frame body is connected between the two oppositely arranged first buoyancy frame bodies. According to the independent lifting culture net cage convenient to tow, the towing efficiency and the net cage installation efficiency at the designated position are effectively improved, the net cage frame body can independently ascend and descend, operation and maintenance operation are convenient, and the problems that in the prior art, the net cage towing efficiency is low, and the net cage installation efficiency is low are solved; and a certain part of cultured objects in the net cage cannot be independently operated.

The invention discloses a satellite remote sensing image mariculture identification method and system based on deep learning, and the method comprises the steps: obtaining an original satellite remote sensing image and annotation data, and carrying out the data preprocessing, and obtaining the preprocessed image slice data and mask annotation data; based on a UPerNet segmentation network, ConvNeXt is selected as an encoder, an SCSE attention mechanism is introduced, and a mariculture facility identification model is constructed; and based on a mariculture facility identification model, identifying the preprocessed image slice data and the mask labeling data to obtain a satellite remote sensing image mariculture facility identification result. According to the invention, the boundary of the aquaculture facility can be accurately positioned, and the identification accuracy of the mariculture facility is improved. The satellite remote sensing image mariculture identification method and system based on deep learning can be widely applied to the technical field of remote sensing image processing.

The invention relates to the technical field of mariculture detection, in particular to a net breakage leakage detection system for a mariculture net cage, and the system comprises a plurality of fixed underwater acoustic device units which are used for obtaining passive acoustic signals; the underwater detection robot is used for transmitting high-frequency sonar pulses and collecting reflection echo signals; the control unit is used for sending a driving instruction to the underwater detection robot and receiving a reflection echo signal and a passive acoustic signal; the signal processing unit is used for extracting time delay and frequency spectrum characteristics from the reflection echo signal and determining position information of a damaged noise source according to the passive acoustic signal; the analysis module is used for extracting a joint acoustic feature vector from the spectrum features through a convolutional neural network, generating a node feature vector representing acoustic association between the net cages through a graph neural network, fusing the joint acoustic feature vector and the node feature vector and then carrying out damage detection; and the position optimization unit is used for carrying out iterative optimization on the position information of the damage noise source and outputting a final net cage damage position.

The invention discloses a magnetic recovery sunlight Fenton reactor and method for treating mariculture wastewater, and belongs to the field of wastewater treatment. A first partition plate is fixed in the sunlight Fenton reaction tank body, a first water outflow channel is arranged between the lower end of the first partition plate and the lower end of the sunlight Fenton reaction tank body, a plurality of telescopic rods are fixedly arranged in the sunlight Fenton reaction tank body, magnets are fixed to the upper ends of the telescopic rods in a threaded screwing mode, and magnetic photocatalyst powder is distributed on the upper surfaces of the magnets; the sedimentation tank body and the sunlight Fenton reaction tank body share one tank wall, a partition plate II is fixed in the sedimentation tank body, a water outflow channel II is arranged between the partition plate II and the lower end of the sedimentation tank body, and the upper part of the sedimentation tank body is fixedly communicated with a water outlet pipe; the water inlet barrel is communicated with a water inlet pipe through a water inlet pump; the water inlet pipe is communicated with the upper part of the left side wall of the sunlight Fenton reaction tank body. The reactor disclosed by the invention is small in occupied area, strong in high-salt impact resistance, capable of efficiently removing pollutants, stable in operation, rapid in photocatalyst recovery, free from secondary pollution and relatively low in cost.

The invention discloses a biological adhesion prevention nano-composite coating for a marine aquaculture netting and a coating process of the biological adhesion prevention nano-composite coating. The coating slurry is composed of a waterborne polyurethane dispersion, an antifouling functional filler and an auxiliary agent; the antifouling functional filler is nano microspheres formed by encapsulating capsaicin by using hydrogenated rosin as a wall material. The preparation method comprises the following steps: preparing the nano-microspheres through a specific process, and dispersing the nano-microspheres in water-based resin to obtain slurry; performing air low-temperature plasma pretreatment on the netting to improve the surface activity; and finally, coating the surface of the netting with the slurry and curing. The problems of dispersion and controllable slow release of natural hydrophobic antifouling components are solved through a nano packaging technology, and meanwhile, the ultrahigh adhesive force of the coating on a flexible hydrophobic base material is realized through a plasma interface activation technology. The two components have a synergistic effect, so that the coating has the outstanding advantages of environmental friendliness, long-acting antifouling property and firm adhesive force, and the technical bottlenecks that the traditional environment-friendly coating is easy to peel and short in service life are effectively overcome.

The invention discloses marinobacter hydrocarbonoclastici SN-1 and a culture method and application thereof, the marinobacter hydrocarbonoclastici SN-1 is marinobacter hydrocarbonoclastici SN-1, is preserved in China Center for Type Culture Collection on August 7, 2024, is located in Wuhan University, Wuhan, China, and has a preservation number of CCTCC NO: M 20241755, and the preservation number of the marinobacter hydrocarbonoclastici SN-1 is CCTCC NO: M 20241755. The invention also discloses application of the marinobacter hydrocarbonoides SN-1 or the microbial inoculum in degradation of ammonia nitrogen, nitrite nitrogen, nitrate nitrogen and / or active phosphate concentration in seawater. The seawater body is a mariculture water body, mariculture tail water or an offshore water body, the salinity of the seawater body is 10-40, and the inoculum size of the mariculture SN-1 is 2%. The marinobacter hydrocarbonoides SN-1 disclosed by the invention can remove ammonia nitrogen, nitrite nitrogen, nitrate nitrogen, total nitrogen, active phosphate and total phosphorus in a seawater water body in an aerobic environment with relatively high salinity, has no toxic effect on aquatic animals, and can be applied to improvement and ecological restoration of a seawater water environment.

The invention provides a marine ranch water environment bearing capacity assessment method, and belongs to the field of water environment assessment. According to the method, satellite remote sensing data, buoy monitoring data, breeding management data and weather forecast data are fused, a physical-ecological coupling dynamic model is established, the dynamic response of a hydrodynamic process and ecological variables is simulated, and an ELM-SVR combined model is adopted to calculate a water environment bearing capacity index. According to the method, the problems of data missing and low model precision in a traditional method are solved, and the accuracy of water environment bearing capacity evaluation is improved. Meanwhile, the breeding scale and mode can be adjusted according to the evaluation result, and continuous harmony of the environment and breeding is achieved. The method is beneficial to improving the economic benefits of the marine ranching and protecting the marine ecological environment, and has important practical value.

The invention belongs to the technical field of water quality prediction, and particularly relates to a water quality dynamic prediction method and system in a marine ranch culture environment, and the method comprises the steps: collecting historical water quality time sequence data, and carrying out the standardization processing; decomposing the standardized water quality time sequence data into a trend component and a season / disturbance component, and performing multi-scale feature coding; based on the seasonal multi-scale features, dynamically adjusting the frequency domain resolution through fractional Fourier transform, and obtaining time domain enhancement features after inverse transformation in combination with multi-head self-attention; based on trend multi-scale features, calculating a Pearson correlation matrix to form a mask matrix, and calculating output channel frequency domain enhancement features in combination with a mask attention mechanism; utilizing a global time sequence attention mechanism to obtain a globally enhanced trunk feature; and performing dynamic gating fusion on the three paths of features to obtain a fused spatial-temporal feature, inputting the fused spatial-temporal feature into a prediction head, and outputting a future value of the water quality time sequence data.

The invention discloses a composite inducer for promoting adhesion and metamorphosis of marine bivalve mollusk larvae and an application method of the composite inducer. The composite inducer for promoting adhesion and metamorphosis of the marine bivalve mollusk larvae comprises glutamine, glutamic acid, potassium chloride, calcium chloride and taurine, and the concentration ratio of the glutamine to the glutamic acid to the potassium chloride to the calcium chloride to the taurine is 1: 1: 2 * 10: 1.7 * 10: 4. According to the application, glutamine, potassium ions, calcium ions, glutamic acid and taurine are matched, the application effect of the glutamine, the potassium ions, the calcium ions, the glutamic acid and the taurine in the aspect of improving the attachment and metamorphosis rate of the shellfish larvae is defined, the technical blank of multi-component cooperative regulation and control of the attachment and metamorphosis of the shellfish at present is filled, a new solution is provided for bivalve shellfish fry production, and the application prospect is wide. The method is of great significance in promoting healthy development of the mariculture industry.

The invention relates to the technical field of biological medicines, and particularly discloses mRNA based on a fish nervous necrosis virus CP protein gene, a vaccine and a preparation method and application of the mRNA. The invention provides mRNA (messenger Ribonucleic Acid) of a fish nervous necrosis virus, which has a nucleotide sequence as shown in SEQ ID NO: 1 and structurally comprises a 5'end untranslated region, a signal peptide sequence, an NNV (Neuronecrosis Virus) antigen coding region, a 3 'end untranslated region and polyA. The mRNA vaccine contains an ORF sequence of a capsid protein CP gene capable of resisting NNV virus infection. Animal safety test results of the fish nervous necrosis virus mRNA vaccine prepared by the invention show that the vaccine is safe, effective and convenient and simple in clinical use, and has a wide application prospect in the aspect of prevention and control of viral nervous necrosis of mariculture fishes.

A mariculture net cage comprises a floating body, a culture body and a driving mechanism. The breeding body comprises a breeding box frame and a protection frame which are sleeved and matched inside and outside, a breeding net is arranged on the breeding box frame, a breeding space is defined by the breeding net, and a protection net is arranged on the protection frame; the floating body is annularly arranged on the periphery of the upper portion of the breeding body. The two horizontal transverse ends of the breeding body are rotationally connected with the floating body. The driving mechanism comprises a plurality of power plates extending transversely, and the power plates are circumferentially and uniformly distributed on the culture body at intervals by taking the rotating axis of the culture body as the center; the floating body is further provided with at least one limiting pin used for limiting rotation of the breeding body. And the protection frame is arranged, so that direct impact of external large fishes on the internal culture box frame can be prevented, and a good protection effect can be achieved. The power plate is arranged, under the impact of ocean current, the part soaked in seawater can be automatically rotated to be exposed to the sea surface, the purposes of regularly drying the net and cleaning can be achieved in cooperation with the limiting pin, and fish can be conveniently collected.

The invention provides a mariculture-wave energy power generation device capable of achieving stabilization, efficiency improvement and adjustable oxygenation, and belongs to the technical field of mariculture engineering.The mariculture-wave energy power generation device capable of achieving stabilization, efficiency improvement and adjustable oxygenation comprises a mariculture device, a wave energy capturing device, an oxygenation device and a PTO system; the mariculture device is a large mariculture net cage and is fixed by a mooring system, and most of a main body of the mariculture device is immersed in water; the wave energy capturing device is an oscillating floater with a wide upper part and a narrow lower part, is distributed around the mariculture net cage in an annular array form, is connected to the top of a mariculture net cage frame through a transmission arm, and is used for driving the transmission arm to swing up and down under the action of waves; the oxygenation device and the PTO system are located on the top of the mariculture net cage frame and connected with the forked pressing structures at the tail ends of the transmission arms respectively. The problems that in the prior art, wave power generation, mariculture, adjustable oxygenation and wave breaking stabilization and stability maintaining cannot be achieved at the same time can be solved.

The utility model discloses integrated mariculture tail water treatment equipment which comprises an electrolysis area, a settling area and an ultrafiltration area which are arranged in a frame, the electrolysis area and the ultrafiltration area are positioned on two sides of the settling area; an electric flocculation device is arranged in the electrolysis area; a plurality of groups of inclined plates are arranged in the settling zone, and a sludge compacting device is arranged at the bottom; according to the tail water treatment device, tail water can be treated, the efficiency is high, and secondary pollution to the tail water is avoided.

The utility model discloses a heat exchanger for mariculture, which is applied to the field of water temperature regulation and comprises a protective sleeve shell, a cold flow filling component is connected to a flange at one end of the protective sleeve shell, a sealing cover plate is connected to a flange at the other end of the protective sleeve shell, and a heat exchange through groove is formed in the protective sleeve shell. A heat exchange assembly is inserted between the inner walls of the protective sleeve shell, and a heat flow feeding pipe is arranged on the side, close to the sealing cover plate, of the upper surface of the protective sleeve shell. When the heat exchange assembly needs to be cleaned, the sealing cover plate is separated firstly, when the light sensation switch detects light, the electric telescopic rod is controlled to contract, the positioning pin rod is separated from the positioning pin hole, then the U-shaped heat exchange pipe and the mounting disc are taken out to clean impurities, moss and the like on the surfaces of the U-shaped heat exchange pipe and the mounting disc, and then the U-shaped heat exchange pipe and the mounting disc are reset. After the mounting disc is in contact with the waterproof microswitch, the electric telescopic rod extends to enable the positioning pin rod to be connected with the positioning pin hole in an inserted mode, and the time for mounting the heat exchange assembly is saved.

This invention provides a slow-release feed device for marine aquaculture, relating to the field of marine aquaculture technology. It includes a rotating drum, a drum cover, and a fixed shaft. A rotating impeller is mounted on the rotating drum, which is connected to the drum cover to form a cylindrical space. The fixed shaft passes through the central axis of the rotating drum and drum cover and is rotatably connected to them. A cake holder, a feed cake, and a cake brush are installed within the cylindrical space. The cake holder is fixedly connected to the fixed shaft, and the feed cake is mounted and fixed on the cake holder. The cake brush rotates synchronously with the rotating drum, brushing the surface of the feed cake to accelerate slow release. Utilizing ocean currents or the up-and-down movement of seawater, the rotating impeller drives the rotating drum to rotate, which in turn drives the cake brush to continuously brush the slow-release flocculated layer formed on the surface of the feed cake. This effectively accelerates the diffusion and release of feed particles, solving the problem of excessively long natural slow-release time for feed cakes and their inability to pass through a 150-mesh or finer silk sieve, thus meeting the needs of aquaculture such as oyster farming.

The invention provides a portable welding device for construction of a marine ranch breeding platform, belongs to the technical field of marine ranch breeding platforms, and solves the technical problem of rapid adaptation of clamps for steel pipes with different pipe diameters of breeding components. A portable welding device for a marine ranch breeding platform comprises a movable table and a separation frame, the two ends of the top of the separation frame are each fixedly connected with two supporting frames, the tops of the two supporting frames on the same side are each fixedly connected with the same rectangular frame, and a first lead screw is rotationally connected between the two ends of the interior of each rectangular frame; and each first lead screw is in threaded connection with a threaded connection block. According to the steel pipe welding device, steel pipes of different specifications can be fixed and adjusted, the universality and adaptability of the device are improved, the welding requirements of the steel pipes of different sizes in a marine ranch breeding platform can be met, shaking and deviation of the steel pipes in the welding process are reduced, and therefore the quality of welding joints is ensured; and the welding precision and reliability are improved.

The utility model discloses a mariculture nitrate nitrogen monitoring system, which comprises a flow-type sensor mounting joint J, a nitrate nitrogen sensor C, a nitrate nitrogen sensor D, a nitrate nitrogen sensor D, a nitrate nitrogen sensor D, a nitrate nitrogen sensor D, a nitrate nitrogen sensor D and a nitrate nitrogen sensor D, and is characterized in that the top of the sensor mounting joint J is provided with a discharge port J2; the input end of the sewage pump B is communicated with the sewage pool, and the output end is communicated with the input end J1 of the sensor mounting joint J; the air compressor is communicated with the airflow input end J3 of the sensor mounting joint J through an air compression valve F1; the input end of the discharge valve F3 is communicated with the input end J1 at the bottom of the sensor mounting joint J; the input end of the water purification valve F4 is communicated with the water purification tank, and the output end is communicated with the input end J1 of the sensor mounting joint J; and the controller is electrically connected with the nitrate nitrogen sensor C and the valves respectively. The sewage pool is provided with a plurality of paths, and each path of sewage pool is communicated with the sewage pump B through a sewage valve. The utility model has the beneficial effects of low maintenance cost, prolonged service life and improved detection precision.

The invention discloses Pseudomonas tai H1R1 and application thereof in treatment of mariculture tail water, the Pseudomonas tai H1R1 has excellent high salt resistance and aerobic denitrification function, can directly convert ammonia nitrogen and nitrate into nitrogen and efficiently remove nitrogen, the nitrogen removal rate can reach 80% or above, nitrogen load in water is reduced, the nitrogen removal efficiency is improved, and the application of the Pseudomonas tai H1R1 in treatment of mariculture tail water is improved. The problem of water eutrophication caused by nitrogen can be prevented; the system can survive and breed under various severe environment conditions and treat mariculture tail water. The pseudomonas tai H1R1 disclosed by the invention can utilize organic matters in mariculture tail water as a carbon source, so that the growth speed and the growth amount of bacteria are increased, and organic wastes in a culture process are reduced, so that the strain H1R1 can promote self growth while treating the mariculture tail water; and double benefits of environmental governance and resource cyclic utilization are realized.

The invention relates to the technical field of mariculture, and discloses a marine ranch culture device with biological monitoring, which comprises a closing assembly, main frames, a telescopic assembly, an outer monitoring assembly, a soft net and an inner monitoring assembly, the main frames are symmetrically arranged at the top and the bottom of the soft net, the closing assembly is slidably connected with the main frames, and the telescopic assembly is slidably connected with the outer monitoring assembly. The two ends of the telescopic assembly are connected with the main frames arranged at the top and the bottom respectively, the outer monitoring assembly is slidably connected with the outer rings of the main frames, the inner monitoring assembly is slidably connected with the inner rings of the main frames, the top of the inner monitoring assembly is provided with a visual detection block, and the top of the outer monitoring assembly is rotatably connected with an infrared detection block. The problems that existing breeding equipment lacks a monitoring system, breeding site conditions inside and outside breeding are inconvenient to monitor in real time, measures are inconvenient to take and the like are solved.

The utility model belongs to the field of marine disaster prevention and reduction and marine fishery production, and particularly relates to a multilayer three-dimensional net cage combined by a double-layer arc plate breakwater and a mariculture net cage, which comprises a top panel, the double-layer arc plate breakwater, a frame reinforcing structure and the mariculture net cage. The double-layer arc plate breakwater comprises an upper-layer plate and a lower-layer plate which are connected through rigid supporting columns, and a top panel is located above the upper-layer plate and connected through the rigid supporting columns. The mariculture net cage is of a netting structure and is integrally fixed to the frame reinforcing structure. The top of the frame reinforcing structure is located below the lower layer plate and connected through a flexible connecting rope, and one or more first mooring chains are arranged at the bottom of the frame reinforcing structure. The marine three-dimensional house has various functions, and has the functions of marine farming and pasturing and high-efficiency utilization of marine three-dimensional space. Disaster prevention and disaster reduction are combined with mariculture requirements in a shallow ocean water layer, sustainable development of ocean farming and pasture is promoted, and economic benefits of the breakwater structure are improved.

The present application relates to the field of aquaculture circulating seawater purification, and particularly relates to a preparation method of an efficient bacteria-algae composite biofilm for aquaculture circulating seawater, comprising the following steps: (1) water preparation: adding aquaculture circulating water and adding nutrient salt in an aquaculture biochemical tank, and adjusting pH and permanganate index; (2) adding modified carrier filler: adding modified hydrophilic wavy arc surface material to a primary biochemical tank, and adding modified hydrophilic polyurethane sponge to a secondary biochemical tank; (3) biofilm formation: keeping seawater circulation in the primary biochemical tank, keeping seawater circulation and aeration in the secondary biochemical tank, and cultivating under illumination until biofilm formation is completed. The chemical oxidation carrier filler is used in the present application, the surface roughness is increased and the hydrophilic group is generated, the hydrophilicity is preliminarily improved, the graphene oxide is further used to improve the hydrophilicity, the microorganisms are beneficial to gather and adhere to the carrier filler to form a relatively firm biofilm, the biofilm formation time is greatly shortened, and the nitrogen content in the aquaculture circulating seawater can be stably and continuously degraded.

This invention provides an intelligent control method and device for automatically extracting seawater, belonging to the field of automated control technology for mariculture. The method acquires current time, geographical location, and tidal time data; uses a water level sensor to detect whether the current water level has reached a preset threshold; and uses a water quality sensor to detect the water's conductivity to determine if it is seawater. When the water level meets the standard, the water is confirmed to be seawater, and the current time is within the high tide period, the pumping equipment is automatically started. The device includes a water level sensor, a water quality sensor, a communication module, a positioning module, a control module, and a relay control interface. This invention, through a multi-condition verification mechanism, avoids misjudgment due to rainfall and water accumulation and malfunctions caused by tidal fluctuations, achieving fully automated intelligent control of seawater extraction operations. It solves the problems of high labor intensity, high risk of nighttime operations, and frequent malfunctions associated with traditional manual operations, thus improving the production efficiency and safety of mariculture.