29 results about "Recirculating aquaculture system" patented technology

This invention belongs to the field of aquaculture equipment and discloses a recirculating aquaculture system for indoor multi-layered culture of freshwater fish germplasm samples. The system includes a stainless steel culture rack, glass culture tanks, a temperature control system, a recirculating water purification system, an aeration system, and electrical and auxiliary materials. Through a three-layered culture structure design, combined with culture tanks of varying sizes and a precise temperature control module, it solves the problem of aquaculture with diverse sizes of freshwater fish germplasm samples and large differences in suitable water temperatures. The system has nine small glass culture tanks in the upper layer and three large glass culture tanks in each of the middle and lower layers, equipped with an external temperature control component and an internal heating rod, achieving full-coverage water temperature regulation from 10℃ to above 30℃. The recirculating water system ensures stable water quality through the synergistic effect of a filter tank, a booster pump, an ultraviolet sterilizer, and various filter media. Meanwhile, the lower culture tanks are equipped with an internal circulation filter to enhance local water purification, meeting the diverse aquaculture needs from small fry to large broodstock.

This invention relates to a filtration device for recirculating aquaculture systems, belonging to the field of aquaculture technology. The filtration device includes a water tank, a connecting plate fixedly connected to one side of the water tank, a filter assembly connected to the water tank and on one side of the top of the connecting plate, and a waste discharge assembly connected to the water tank and on the top of the connecting plate. An oxygen supply assembly is located at the top of the water tank. By using the filter assembly, the first filter tube can be backwashed using a valve, thereby extending the service life of the first filter tube, avoiding frequent replacement, and reducing maintenance costs. The waste discharge assembly discharges the filtered impurities into and onto a discharge plate, effectively concentrating the impurities. The oxygen supply assembly, under the elastic force of a second spring, allows a scraper to clean the inner wall of the water tank, improving the cleaning effect.

This invention provides a coupled recirculating aquaculture system and method. The coupled recirculating aquaculture system includes: an aquaculture pond for aquaculture, with a central suspended solids drain pipe and a water-pushing device inside; a denitrification unit whose inlet is connected to the central suspended solids drain pipe and whose outlet is connected to the water-pushing device, the denitrification unit denitrifies the water and returns the denitrified water to the aquaculture pond via the water-pushing device; and a carbon-nitrogen ratio coordination unit connected between the water-pushing device and the denitrification unit, which adjusts the content of growth elements in the water entering the aquaculture pond according to changes in the growth elements required by the aquatic products, and simultaneously sends the water discharged from the denitrification unit into the aquaculture pond via the water-pushing device. The denitrification unit effectively removes ammonia nitrogen from the water in the aquaculture pond, ensuring the lifespan of the aquatic products and reducing the area of ​​the coupled recirculating aquaculture system.

This utility model relates to the field of juvenile acclimatization pond technology, specifically a juvenile acclimatization pond for mandarin fish based on a recirculating aquaculture system. The pond includes a circular body with a fish inlet fixedly connected to the top of its side wall. This fish inlet is connected to the opening pond via a pipe. The advantages of this utility model are: the circular pond structure combined with a central drain outlet at the bottom allows for rapid and directional discharge of pollutants such as uneaten feed and feces, effectively reducing the entry of large particulate pollutants into the recirculating water treatment system and lowering energy consumption. The unique fish inlet design allows mandarin fish juveniles to be automatically transferred from the opening pond to the acclimatization pond via water flow guidance, avoiding mechanical damage and stress caused by manual harvesting and significantly reducing juvenile loss. The annular spray jet design simulates a natural feeding environment through regular water flow stimulation, successfully establishing a conditioned reflex feeding mechanism in the mandarin fish juveniles, increasing the acclimatization success rate to over 85%.

A method for preparing encapsulated particles for a recirculating aquaculture system (RAS) and the RAS system itself are disclosed. The method includes: mixing aquaculture wastewater containing chemical drugs and drug-resistant denitrifying microorganisms with a powdered additive to enrich the bacterial source; obtaining a solid-liquid mixture through solid-liquid separation; mixing the mixture with a prepolymer and water in a specific ratio, adding an initiator to crosslink and form a polymeric gel block; and cutting the mixture to obtain encapsulated particles. The system includes an aquaculture tank, a circulation pipeline, a pretreatment unit, a tubular denitrification reactor, and an aeration unit. The pretreatment unit is used to enrich and separate the bacterial source, and the tubular denitrification reactor is filled with the aforementioned encapsulated particles to achieve denitrification. This invention directly utilizes the system's own wastewater to prepare encapsulated particles, exhibiting strong bacterial source adaptability, low cost, and good drug tolerance and mass transfer efficiency. It effectively improves denitrification stability and system operation continuity, and is suitable for wastewater treatment in RAS systems.

This application discloses an aquaculture system and method that couples factory-scale recirculating aquaculture system (RAS) with pond ecological purification. The system comprises a raised-level pond aquaculture unit, an ecological purification unit, and a water circulation unit. By synergistically coupling the raised-level pond aquaculture unit and the ecological purification unit, this application overcomes the drawbacks of separating production and pollution control in traditional aquaculture. It solves the problems of heavy pollution in traditional pond effluent, high construction costs of fully enclosed RAS systems, and poor operational stability. It achieves internal closed-loop regeneration of aquaculture effluent, near-zero external discharge, and high-quality, sustainable aquatic product output. Simultaneously, the dual-circulation waterway design balances the load on the ecological purification unit, maximizes the functions of plants and filter-feeding organisms, shortens the reuse path, and minimizes water temperature fluctuations.

A containment system specifically adapted to hold crabs and other crustaceans either in an aquaculture storage tank of a recirculating aquaculture system or outside of the storage tank includes tray compartments that slidably engage shelf projections or tracks extending from sidewalls or upright posts of a support frame. The top tray lid is latched, and handles are provided on the tray sidewalls. A removable sleeve attached to the tray deters crabs from evacuating the tray compartment when the tray lid is opened. The support frame is supported for rolling movement. Each tray compartment has porous walls and houses one or multiple crabs. Multiple tray compartments may be housed into the support frame in columns and rows as desired. The containment assembly (multiple frames and multiple tray compartments) may be lowered into or raised out of the aquaculture storage tank with automated equipment.

This invention provides a method and apparatus for power distribution network fault recovery that considers fishery load demands, relating to the field of computer technology. The method includes: acquiring power distribution network status data and initial environmental parameters of the recirculating aquaculture system after a fault, determining power line constraints and fish survival constraints; constructing a power distribution network fault recovery optimization model; using the minimization of power loss load as the objective function of the optimization model, with power line constraints and fish survival constraints as constraints; solving the optimization model to obtain a fault recovery strategy, and restoring power supply to the power distribution network. The method and apparatus provided by this invention, by considering power network operation constraints and fish survival constraints, constructs an objective function to minimize power loss, ensuring that the power distribution network meets both power supply safety and reliability requirements during recovery while also considering the stability of the fishery production environment, thus achieving synergy between power recovery optimization and fishery production protection.

This application provides a recirculating aquaculture system, relating to the field of aquaculture technology. By setting up a main water circulation loop, wastewater discharged from the aquaculture ponds is treated by a water circulation treatment module and then returned to the ponds for reuse, reducing water consumption and pollution caused by direct discharge of aquaculture wastewater, thus conforming to the concept of green aquaculture. The water circulation treatment module adopts a multi-stage treatment structure of "microfilter + primary biological treatment tank + secondary biological treatment tank + disinfection chamber." The microfilter removes solid particles from the water, the primary biological treatment tank specifically degrades ammonia nitrogen, and the secondary biological treatment tank specifically degrades nitrite, solving the problem of harmful nitrogen accumulation in the aquaculture water. The disinfection chamber kills harmful microorganisms in the water, reducing the spread of aquaculture diseases.

This invention discloses a method for constructing a land-based recirculating aquaculture system based on constructed wetlands, relating to the fields of aquaculture and resource utilization technology. By deploying a sensor network combined with a spatiotemporal convolutional neural network, dynamic pollutant identification and risk map generation are achieved, and multi-level wetland purification units are automatically activated for precise treatment. A density peak clustering algorithm is used to intelligently identify high-load sedimentation areas, and sediment is transformed into stable and usable resources through automated dredging and targeted microbial degradation. A resource utilization path optimization model is constructed based on a reinforcement learning algorithm to dynamically generate the optimal resource allocation scheme. When the resource circulation path reaches a set threshold, it automatically switches to a normalized intelligent maintenance mode, forming a closed-loop management system. This solves the problems of fragmented treatment processes, sediment accumulation, and low resource utilization efficiency in traditional aquaculture wastewater treatment, achieving intelligent control throughout the entire process and significantly improving the system's purification efficiency, resource utilization rate, and operational economy.

This invention discloses a method for the zonal symbiotic aquaculture of striped sawfish and turbot in a recirculating aquaculture system, belonging to the field of aquaculture technology. The method involves dividing the aquaculture pond into upper and lower zones within a unified recirculating aquaculture system using permeable mesh screens. Striped sawfish are introduced into the upper and middle layers, while turbot are introduced into the lower zones. The water temperature is controlled at 20-24℃, with a photoperiod of 12L:12D, with low light intensity in the upper zone and shading in the lower zone. The upper zone is fed floating extruded feed, while the lower zone is fed sinking soft pellet feed, with staggered feeding times. Water quality is controlled with dissolved oxygen ≥6mg / L, ammonia nitrogen <0.1mg / L, nitrite <0.1mg / L, and pH 7.8-8.2. Regular monitoring and zonal harvesting are conducted. This invention utilizes physical zoning and complementary ecological niches to avoid interspecies competition and interference, enabling two high-value fish species to coexist efficiently in the same water body. This significantly increases yield and economic benefits per unit water volume, reduces aquaculture risks, saves energy and reduces consumption, and allows for precise management, making it suitable for the promotion and application of factory-scale recirculating aquaculture.

The utility model provides a novel freshwater fish factory recirculating aquaculture system which comprises an aquaculture pond, a vertical flow precipitator, a microfilter pond, a biochemical air floatation pond, a sand cylinder filter, a nano denitrification system and a multi-stage air stripping system, the aquaculture pond is respectively connected with the vertical flow precipitator and the microfilter pond, the vertical flow precipitator is connected with the microfilter pond, the biochemical air floatation pond is connected with the sand cylinder filter, and the nano denitrification system is connected with the biochemical air floatation pond. The biochemical air floatation tank is connected with the microfilter tank through a pipeline, the biochemical air floatation tank comprises an air floatation bin, a pump bin, a biochemical bin and a denitrification bin, and the pump bin is respectively connected with the sand cylinder filter, the nano denitrification system and the multi-stage air stripping system through pipelines; and circulating pumps are arranged on pipelines for connecting the pump bin with the sand cylinder filter, the nano denitrification system and the multi-stage air stripping system. According to the utility model, the multi-stage cooperative treatment system is constructed and the denitrification system is introduced, so that the total nitrogen removal rate of the culture system is increased to 96%, which is increased by 140% compared with that of the traditional system, the water supplementing amount of the system is reduced, the daily water supplementing amount is reduced to be less than 3%, and the water-saving rate of the total circulating water amount is more than 70%.

This invention provides a low-energy recirculating aquaculture system, comprising an aquaculture pond with a wastewater separation structure, a filtration pond for treating water from the aquaculture pond, and a biological fluidized bed filtration pond for treating water from the filtration pond that is returned to the aquaculture pond. A first discharge outlet is formed at the bottom of the aquaculture pond. The filtration pond includes several suspended biological filter bags for treating the incoming water and a supporting filter plate located at the water inlet. Each biological filter bag includes a biological filter bag body for physical filtration and biological filter media filled within the biological filter bag body. The biological filter bags are suspended at the corresponding positions of the filter holes on the supporting filter plate. This low-energy recirculating aquaculture system integrates wastewater separation, biological filtration, physical filtration, and fluidized bed filtration, achieving rapid and efficient removal of various pollutants from water within a limited space, maintaining water quality, and reducing water waste.

This application provides an integrated pollutant removal device for wastewater from facility-grown fish farming, relating to the field of aquaculture technology. The integrated pollutant removal device for wastewater from facility-grown fish farming includes a treatment container with an inlet at the bottom. The outlet of the inlet is connected to the inlet of an inner cylinder. Wastewater flows through the inner cylinder to the top of the treatment container and flows out through the gap between the inner cylinder and the treatment container. The wastewater sequentially passes through a large particle impurity remover and a demister installed at the top of the treatment container before flowing counter-currently into the interior of the treatment container. The wastewater is then filtered by a multi-porous screen, a drawer-type coarse filter media, and a drawer-type fine filter media sequentially installed inside the treatment container. After dripping into a fixed fluidized bed for biological treatment, the water flows out through a siphon outlet. Vent holes are provided on both sides of the treatment container near the demister. This invention achieves efficient wastewater treatment through a combination of counter-current aeration and multi-layer filter media, facilitating rapid deployment and operation.

This invention discloses a recirculating aquaculture system, belonging to the field of aquaculture. The recirculating aquaculture system includes a culture pond, an outlet trough, a primary biological treatment tank, a gravity granular filter, a lift pump, a return water pipe, and a return conveying assembly. The outlet trough, primary biological treatment tank, and gravity granular filter are all located within the culture pond. A lift pump is installed at the bottom of the culture pond, and the outlet of the lift pump is connected to the return water pipe. The outlet of the return water pipe is connected to the primary biological treatment tank, and the outlet of the primary biological treatment tank is connected to the outlet trough. The outlet of the outlet trough is connected to the gravity granular filter, and the outlet of the gravity granular filter is connected to the culture pond via the return conveying assembly. This invention's recirculating aquaculture system integrates the outlet trough, primary biological treatment tank, and gravity granular filter within the culture pond, eliminating the need for traditional complex supporting equipment, simplifying the recirculating aquaculture process, and reducing initial investment and the barriers to factory-style aquaculture.

This invention relates to the field of intelligent management and control technology for recirculating aquaculture systems (RAS), and discloses a cloud-based RAS management and control method and cloud platform. During the operation of the RAS system, behavioral characteristic data of the cultured organisms are collected to construct a behavioral characteristic time series. Based on the behavioral characteristic time series, structural features representing behavioral change patterns are extracted. The behavioral characteristic time series and its corresponding structural features are input into a deep learning model, which outputs the risk evolution rate representing the rate of change of the RAS risk state over time. The risk state is updated recursively over time based on the current risk state and the risk evolution rate. When the updated risk state does not reach a preset alarm threshold and the risk evolution rate shows a continuous upward trend, the system is determined to have entered a potential stress state, triggering early control operations. Through this method, the proactive identification and control of the risk state of the RAS system is achieved.

The embodiment of the application discloses a circulating water aquaculture system, comprising: an aquaculture pond, a solid-liquid separation device, an elevator, a protein separator, a biochemical water treatment device and a backflow unit, the aquaculture pond, the solid-liquid separation device, the elevator, the protein separator and the biochemical water treatment device are sequentially arranged along a water inlet direction, and the backflow unit is connected with the biochemical water treatment device and the aquaculture pond. The circulating water aquaculture system can make the treated aquaculture wastewater backflow to the aquaculture pond for recycling, so that the aquaculture pond only needs to supplement a small amount of water, which can greatly save water resources, greatly reduce the infection of pathogenic bacteria brought by additional water, and effectively improve the aquaculture density and the aquaculture quality.

A fish handling structure for use in a recirculation aquaculture system includes a tank having a tank wall, wherein the tank has an interior water flow channel defining an infinite loop.

The application relates to a metabolic reinforced ecological circulating water aquaculture system suitable for relay breeding of ricefield eels, wherein a breeding pond unit is a variable-width runway type breeding pond, the width ratio of the water inlet end to the water outlet end is 2:1-3:1, a plurality of eel nests are hung in the breeding pond, bait tables are arranged on each eel nest, and the bait tables are used for feeding ricefield eels; a water quality purification unit sequentially comprises a drum type solid-liquid separator, a moving bed type biological filter and a drip type biological filter in the water circulation direction, a pipeline at the water outlet end of the drip type biological filter is provided with an ultraviolet disinfection lamp; a temperature control unit comprises an air source heat pump and a refrigerating machine, and is communicated with the pipeline of the moving bed type biological filter to regulate and control the water temperature; an oxygenation unit is an air aeration oxygenation machine, and is communicated with the breeding pond unit and the moving bed biological filter; and a water circulation regulation unit is a circulating pump with a frequency converter, and is matched with a closed loop water circulation pipeline to adjust the hourly circulation times of the system water body.

This invention relates to the field of water purification technology and discloses a cyclone separator for separating fish waste. The device includes a main cylinder, an upper cylinder cover, and a lower cylinder cover, forming a vertically arranged internal cavity. The cavity contains a separation zone, a buffer zone, a purified water zone, and a residue zone. The main cylinder has an inlet tangentially connected to the separation zone, causing wastewater to swirl within the separation zone. A convex conical separation hood is located at the bottom of the separation zone, with its bottom edge forming a separation slit between the hood and the inner wall of the cylinder, used to guide the fish waste and impurities separated during the cyclone process into the residue zone. A first guide hood with water passage holes is located at the top of the separation zone, used to guide the separated liquid into the buffer zone. A filter structure is installed between the buffer zone and the purified water zone, and the purified water zone is connected to the outlet. A drain outlet is located at the bottom of the residue zone. This device combines cyclone separation with structural guidance to achieve effective separation of fish waste from water, improving operational stability and ease of maintenance.

This invention relates to the field of wastewater treatment technology, and discloses a method and system for processing water treatment efficiency data in recirculating aquaculture systems (RAS). The method includes: assessing the influence of trace element parameters in standard water quality data of the RAS area on the RAS area, and converting them into influence weights corresponding to the trace element parameters; adjusting the influence weights based on the synergistic and antagonistic reactions between trace elements in the standard water quality data to obtain optimized influence weights; merging the trace element parameters and optimized influence weights into a comprehensive water treatment efficiency index for the RAS area; determining that the RAS area is in an inefficient operating state when the comprehensive water treatment efficiency index is lower than the lower limit of the historical threshold range; and selecting water quality adjustment strategies corresponding to the inefficient operating state from a preset water quality adjustment strategy library. This invention can improve the efficiency of RAS water treatment efficiency data processing.

The invention relates to a method of fish farming in a recirculating aquaculture system (RAS) comprising a fish holding unit (2) in fluid communication with a water supply device (3), the fish holding unit containing a volume of water defining a water depth, the water having a certain osmolality, oxygen concentration, temperature and pH, the method comprising the steps of: providing the water supply device with a flow of non-recirculating water, the non-recirculating water differing from the water in the fish holding unit in at least one of osmolality, oxygen concentration, CO2 concentration, N2 concentration, NH4+ concentration, temperature and pH; providing feed pellets (31); and adding the feed pellets to the non-recirculating water and hydraulically transporting the feed pellets to the fish holding unit. The method allows for a more efficient operation of the RAS facility. The invention also relates to a RAS facility.

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.

This invention belongs to the field of digital twin technology in aquaculture. It discloses a dynamic monitoring and precise control system for recirculating aquaculture systems based on digital twins. By constructing a spatial distribution map of biofilm activity and introducing biofilm age factors and oxygen-nitrogen conversion equivalent coefficients, it overcomes the technical bottleneck of predicting the performance of biofilters. Through multidimensional statistical distance calculation of fish behavior feature vectors and baseline behavior patterns, it achieves precise quantification of stress states. It creates a dynamic nitrification capacity envelope model and a stress recovery prediction model, transforming biological processes into calculable parameters. Time-frequency decomposition technology is used to achieve model self-calibration, ensuring long-term prediction accuracy. The system establishes a digital twin mapping of the entire aquaculture chain through load coupling prediction and water treatment-feeding synergistic optimization, transforming environmental control from experience-based management to data-driven precise decision-making, significantly improving water quality stability, feed utilization, and aquaculture efficiency.

This application discloses a factory-scale intelligent aquaculture system, relating to the field of recirculating aquaculture technology. The system includes: recirculating aquaculture infrastructure, a programmable logic controller (PLC), a data transmission unit (DTU), and a network video recorder; a water quality sensor group, an environmental sensor group, a working condition sensor group, an underwater camera, and a surface camera. The system collects on-site data from the aquaculture system through its data acquisition devices and sends the collected data to the PLC. After receiving the data, the PLC sends it to external devices via the DTU. The external devices then determine control decisions, such as whether to change the operating status of each infrastructure element and how to do so, and send these decisions back to the PLC via the DTU. The PLC then controls the operating status of each device, thereby automatically controlling the operating status of each device and improving the aquaculture efficiency of the recirculating aquaculture system.

The utility model discloses a kind of circulating water aquaculture systems, including aquaculture pond, reservoir, pumping mechanism and backwater pipe, the pool mouth of reservoir is lower than the pool mouth of aquaculture pond, pumping mechanism pumps the water in reservoir into aquaculture pond, backwater pipe one end is provided with water inlet, setting in aquaculture pond, the other end of backwater pipe is provided with water outlet, setting in reservoir, water inlet is higher than water outlet;Aquaculture system further includes filtering mechanism, filtering mechanism includes bottom plate, backing plate, cannula, filter screen and handle, bottom plate is fixedly connected on the outer side of cannula upper end, cannula inserts water inlet, filter screen is fixedly connected on the upper side of bottom plate around cannula, handle is installed on the upper side of filter screen, backing plate is fixedly connected on bottom plate below, and extend outward. The utility model proposes a kind of circulating water aquaculture system, can prevent backwater pipe blockage.

This utility model discloses a recirculating aquaculture system for white shrimp larvae rearing, relating to the field of white shrimp larvae rearing technology. The recirculating aquaculture system for white shrimp larvae rearing includes a rearing pond, an intercepting filter, and a sealing disc. The rearing pond is divided into upper and lower sections. The upper section has a straight hollow cylindrical structure, while the lower section has an inverted conical hollow structure, which reduces dead zones in the water flow and guides the water flow to form a uniform circulation. Simultaneously, the inverted conical lower section uses gravity to guide impurities to the bottom. The intercepting filter is embedded in the middle of the lower section of the rearing pond and is horizontally distributed. The intercepting filter is used to intercept shrimp larvae and allow impurities to pass through, preventing juvenile shrimp from being sucked in and damaged. The sealing disc is located on the top surface of the intercepting filter and can cover and seal the filter, causing impurities to accumulate on the disc rather than on the filter, thus preventing filter clogging.

This invention discloses a factory-scale recirculating aquaculture system (RAS) for the large-spined loach. The method specifically includes the following aspects: selection and pretreatment of the rearing pond, arrangement of habitat units, setting up feeding facilities, operation of the recirculating aquaculture system, and stocking and management of fry. The habitat unit consists of large-diameter and small-diameter pipes; multiple small-diameter pipes are evenly placed and fixed within each large-diameter pipe, with the axis of the small-diameter pipes parallel to the axis of the large-diameter pipes. The feeding facilities consist of multiple liftable feeding platforms evenly placed along the wall of a 6m diameter land-based circular rearing pond. This factory-scale RAS method, which provides a suitable habitat for the large-spined loach, adapts to its feeding habits, optimizes recirculating aquaculture system operating parameters, quantifies rearing density, and manages feeding, has significant practical implications and promotional value for overcoming the technical bottlenecks in large-scale large-spined loach farming and promoting the sustainable development of the industry.

This invention relates to the field of water treatment technology for recirculating aquaculture systems (RAS), and discloses a method for rapidly cultivating stable nitrifying bacteria in a land-based recirculating aquaculture system. The method includes the following steps: Step S1, system preparation and enrichment of ammonia-oxidizing bacteria; Step S2, oxygen deprivation and regulation to inhibit ammonia-oxidizing bacteria and create a growth window for nitrite-oxidizing bacteria; Step S3, restarting oxygenation to promote the establishment of nitrite-oxidizing bacteria dominance; Step S4, stable system operation. This method for rapidly cultivating stable nitrifying bacteria in a land-based recirculating aquaculture system achieves rapid startup of the biofilter and synchronization with aquaculture production, greatly improving facility utilization. This invention completely changes the traditional two-stage model of "cultivating bacteria first, then releasing fish." By simultaneously releasing low-density aquaculture organisms after system water injection, the bacteria cultivation process is fully integrated into the early stage of aquaculture. This allows the biofilter to reach a stable operating state within 25-30 days after the start of aquaculture, significantly shortening the system idle period.