Recirculating Fish Farming Systems Trend Report

Solid suspended particulate matter has adverse effects on various aspects of land-based industrial recirculating aquaculture systems, therefore, removing solid suspended particulate matter is the primary goal of recirculating aquaculture treatment. The majority of particles in the circulating aquaculture system are smaller than 100 microns in size. Due to factors such as water turbulence, biodegradation, and mechanical agitation, suspended particles that cannot be removed in a timely manner will break down into smaller particles, typically less than 30 microns in size. In this case, sedimentation treatment and mechanical filtration will become ineffective.Foam separation technology is a technology used to remove fine suspended particles. By introducing air into the water body, the surfactant in the water is absorbed by tiny bubbles, and then rises to the water surface with the buoyancy of bubbles to form foam, so as to remove dissolved and suspended substances in the water. At present, foam separation is considered as one of the main processes to effectively remove micro particles in the recirculating aquaculture system, and is an important part of the recirculating aquaculture system.Principle of Protein Skimmers1. Foam Fractionation PrincipleThe protein separator is mainly based on the principle of foam separation. In a recirculating aquaculture system, due to the presence of a large amount of organic matter in the excrement and residual feed of aquaculture organisms, surface active substances such as proteins in these organic matter have amphiphilicity (both hydrophilic and oleophilic). When a large number of tiny bubbles are introduced into water, these surface active substances will adsorb onto the surface of the bubbles. With the rise of bubbles, the bubbles with protein and other substances adsorbed on the surface form a foam layer on the water surface. The density of the foam layer is small, and it is easy to separate from the water body, thus removing organic matters such as protein in the water.2. Physicochemical ProcessFrom a microscopic perspective, there is surface tension between bubbles and water. When bubbles rise in water, organic molecules in the water will aggregate towards the surface of the bubbles under the action of surface tension. This is a physical adsorption process, accompanied by some chemical changes such as interactions between organic molecules and chemical reactions with the surface of bubbles. For example, some protein molecules may undergo denaturation, making them easier to adsorb onto bubbles.The Role of Protein Skimmers in Recirculating Aquaculture(1) Water Purification1. Remove organic matterProtein separators can effectively remove organic matter from water, including proteins, fats, sugars, etc. If these organic compounds accumulate in water, they will be decomposed by microorganisms, consuming a large amount of dissolved oxygen and producing harmful substances such as ammonia nitrogen and nitrite. Removing these organic compounds through a protein separator can alleviate the pressure of subsequent biological filtration and reduce the production of harmful substances in water. For example, without a protein separator, the chemical oxygen demand (COD) in water may rapidly rise to over 100mg/L, while with the use of a protein separator, COD can be controlled at around 30-50mg/L.2. Reduce the production of ammonia nitrogenDue to the removal of nitrogen-containing organic compounds such as proteins by the protein separator, the potential source of ammonia nitrogen in water is reduced. This is crucial for maintaining a low concentration of ammonia nitrogen in the recirculating aquaculture system, as ammonia nitrogen has strong toxicity to aquaculture organisms.(2) Improved Water ClarityThe protein separator can not only remove organic matter, but also carry away suspended particles with a particle size of less than 30 microns in the water, improving the transparency of the water and promoting the growth of aquaculture organisms.(3) Reduction of Disease TransmissionRemoving pathogen carriers: Organic matter and suspended particles in water are often carriers of pathogens, such as bacteria, viruses, and parasites. The protein separator removes these carriers, which reduces the chance of pathogen transmission in water and lowers the risk of disease infection in aquaculture organisms.

Today, our workers in factory are working extra hour to produce the collapsible fish holding tanks that customers have ordered 5 days ago. We will deliver these pvc fish tanks with metal frame to our Nigeria customer.

Thanks Ekanem Efiong for trusting us.We wish you a great success in fish farming in advance.

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In the process of fish farming, we will inevitably encounter dead fish in fish ponds, especially the fry that have just been released, because after water transfer, net pulling, transportation and other operations, the fish's physique will become particularly poor At this time, if we put the seedlings in the pond, dead seedlings will easily appear. Then the fish just put in the fish pond, when there are dead fish, do you need to fish out the dead fish?Regarding this problem, my suggestion to you is to fish out the dead fish in the pond. In the process of fish farming, no matter whether the fish just released dies or dies due to other reasons, it must be done as soon as possible. It is necessary to take the dead fish out of the water and handle them properly, because in the process of fish farming, we often have major problems because some details are not done properly.Because if the dead fish is not fished out of the fish pond at this time, some substances that are unfavorable to fish and water will be produced during the decomposition process of the dead fish, which will seriously cause the water quality to stink, and the harmful substances such as ammonia nitrogen in the water will be too high. If the water quality is poor, it will further stimulate the fish, which is a vicious circle. Therefore, once there are dead fish in the pond during the fish farming process, they must be fished out in time.What's more, no matter what the cause of death is, there will always be some pathogens on the dead fish, and they will multiply rapidly on the dead fish, which will increase the density of pathogens in the entire water body, and even some fish will Eat dead fish directly. In this case, it is easy to cause fish diseases to spread in a large area, which is extremely unfavorable for the prevention and control of fish diseases. Therefore, when there are dead fish in the fish pond, they must be dealt with in time.Of course, it is only the most basic measure to fish out dead fish in fish ponds. What is more important is to find out how the fish died. It will stabilize after 3 days. If the number of dead fish has not dropped after 3 days, you need to pay attention.

The recirculating aquaculture system is a new type of aquaculture model, which uses a series of water treatment units to process the wastewater generated in the aquaculture pond and then recycle it. The main principle of RAS is to integrate advanced technologies in environmental engineering, civil engineering, modern biology, electronic information and other disciplines to remove residual bait feces, ammonia nitrogen (TAN), nitrite nitrogen (NO2--N ) and other harmful pollutants. For the purpose of purifying the breeding environment, the process of re-entering the purified water into the breeding pond by using physical filtration, biological filtration, removal of CO2, disinfection, oxygenation, temperature adjustment and other treatments. It can not only solve the problem of low utilization rate of water resources, but also provide a stable, reliable, comfortable and high-quality living environment for breeding organisms, and provide favorable conditions for high-density farming.

Introduction to Recirculating Aquaculture Systems (RAS)In the quest for sustainable and efficient aquaculture practices, Recirculating Aquaculture Systems (RAS) have emerged as a game-changer. This innovative approach to fish and shellfish farming involves recycling water within a closed-loop system, drastically reducing waste and minimizing resource consumption. The origins of RAS can be traced back to the 1970s when scientists and aquaculturists began exploring ways to create more sustainable and controlled environments for aquatic species. Today, RAS is not just a niche solution but a scalable and vital component of modern aquaculture.RAS systems are particularly well-suited for regions facing water scarcity issues. For instance, countries like Israel and parts of the United States have seen significant improvements in water usage and environmental sustainability through the implementation of RAS. In these areas, RAS has proven to reduce water consumption by up to 50%, making it a highly effective solution for environmentally conscious farming.Key Components of a Recirculating Aquaculture SystemA RAS is a complex yet coherent ecosystem comprising several critical components that work in harmony:- Recirculation Loop: This is the backbone of the RAS, where water is continuously circulated through the system. By minimizing external water intake, RAS ensures a more sustainable and efficient operation.- Biological Filtration: Essential for maintaining water quality, this component utilizes nitrifying bacteria to convert harmful ammonia and nitrites into less toxic nitrates. This process not only cleans the water but also supports a healthy aquatic environment.- Mechanical Filtration: Filters such as screens, foam fractionation units, and sand beds play a crucial role in removing solid waste from the water. This helps prevent clogs and maintain the clarity and purity of the water.- Water Quality Management: Advanced monitoring systems ensure that parameters like temperature, dissolved oxygen, and pH levels are optimal for the health and productivity of the aquatic species.Benefits of Recirculating Aquaculture SystemsRAS offers numerous advantages that make it a compelling choice for modern aquaculture:- Sustainability: By recycling water, RAS significantly reduces the demand for fresh water, making it an ideal solution for arid regions or areas with limited water resources. For example, a study in California showed that RAS could conserve up to 50% of water usage compared to traditional aquaculture systems.- Efficiency: The closed-loop nature of RAS leads to lower operational costs, as it minimizes waste and reduces the need for external inputs. This efficiency translates into more profitable operations for farmers.- Improved Water Quality: Constant monitoring and control ensure that the water quality remains at optimal levels, reducing the risk of disease and improving the overall health of the aquatic species.Types of Recirculating Aquaculture SystemsDifferent types of RAS cater to diverse species and environmental conditions:- Vertical Farming: This innovative approach involves stacking tanks to maximize space and efficiency, making it particularly suitable for urban settings.- Hydroponic RAS: This system integrates plants and fish, allowing for nutrient recycling and reducing overall waste. Its a win-win solution for aquaculture and agriculture.- Modular Systems: Flexibly designed, these systems can be easily relocated and scaled up, providing greater adaptability and scalability.Manufacturers Role and Technological AdvancementsManufacturers play a pivotal role in the advancement of RAS technology. They introduce cutting-edge solutions that enhance the efficiency and sustainability of these systems:- Biofiltration and Nitrification: Advanced biological systems that improve water quality and efficiency.- Electrocoagulation: A water treatment method that removes impurities without the need for chemical use, making it a greener option.- Automation and IoT Integration: Sensors and real-time data analytics enable precise control and optimization of RAS operations.Case Studies of Successful ImplementationsSeveral successful RAS implementations highlight the practical benefits of this technology:- In Denmark, a large-scale RAS farm has demonstrated significant water savings and improved operational efficiency.- In the United States, smaller RAS farms have shown how this technology can be adapted to local conditions and yield high-quality seafood.Future Trends and Potential ExpansionAs demand for sustainable aquaculture practices grows, RAS technology is set to evolve and expand. Future trends include:- Integrating AI and IoT: Enhanced monitoring and control systems that allow for real-time adjustments.- Adapting to Climate Change: Developing systems that resist environmental stressors and improve resilience.- Expanding Global Market Potential: Utilizing RAS in developing economies to meet the growing demand for seafood.ConclusionRecirculating Aquaculture Systems offer a sustainable and efficient solution for raising fish and shellfish. By integrating innovative technologies and fostering collaboration, manufacturers are driving the future of aquaculture towards greater sustainability and profitability. Embracing RAS is not only a step towards environmental stewardship but also a strategic investment in the future of sustainable production.