Smart Fish Farming Ras System AI Monitoring For Catfish Trout Breeding Industrial Ras System

Introduction of RAS

The Recirculating Aquaculture System (RAS for short) is an industrial aquaculture model that enables the recycling of aquaculture water within the system through a series of water treatment technologies, including physical filtration, biological filtration, oxygenation, and disinfection. Its core principle is to simulate the material circulation process of the natural ecosystem. In a relatively closed environment, organic wastes such as uneaten feed and feces generated during the aquaculture process are converted into harmless substances, while the water quality is maintained stable, providing a suitable growth environment for aquatic products.

Components

Physical Filtration Unit: This is the first line of defense in the RAS system, which is used to remove solid particles in the water, such as uneaten feed, feces, and so on. Mechanical filtration equipment is usually adopted, such as microstrainers, sand filters, etc. Microstrainers can filter out larger particulate impurities, with a filtration precision generally around several tens of micrometers, which can effectively prevent these impurities from damaging subsequent equipment and polluting the water quality.

Biological Filtration Unit: This is a crucial part of the system. It mainly uses microorganisms to decompose harmful substances in the water, such as ammonia nitrogen and nitrite. The biological filter is a common biological filtration device, and its interior is filled with biological filter media, such as ceramic rings, biochemical balls, etc. These filter media provide attachment and growth sites for beneficial microorganisms like nitrifying bacteria. Through their metabolic activities, the microorganisms convert ammonia nitrogen into nitrate, thus reducing the content of harmful substances in the water.

Oxygenation Unit: To ensure sufficient oxygen supply for aquatic products, the RAS system is equipped with oxygenation devices. Commonly used ones include microporous aerators and pure oxygen aeration devices. Microporous aerators can evenly disperse air into the water, increasing the dissolved oxygen content in the water; pure oxygen aeration devices can more efficiently raise the dissolved oxygen level in the water, meeting the oxygen demands of aquatic products under high-density aquaculture conditions.

Disinfection Unit: It is used to kill pathogens such as harmful bacteria, viruses, and parasites in the water, ensuring a healthy aquaculture environment. Ultraviolet disinfection devices and ozone generators are commonly used disinfection equipment. The ultraviolet disinfection device achieves the purpose of disinfection by emitting ultraviolet rays to damage the DNA structure of the pathogens; the ozone generator uses the strong oxidizing property of ozone to kill the pathogens, and after disinfection, ozone will decompose into oxygen on its own, leaving no harmful residues in the water.

Advantages of RAS

I.Efficient resource utilization
Water recycling: One of the greatest advantages of the Recirculating Aquaculture System (RAS) is its ability to recycle aquaculture water. Through a complex water treatment process, the system can effectively remove impurities, harmful substances from the water, and replenish oxygen, enabling the aquaculture water to circulate within the system for a long time. This is in stark contrast to traditional open aquaculture methods. In traditional aquaculture, large amounts of water are discharged after a single use, while the water recycling rate of the RAS system can reach 90% - 99%, greatly reducing water waste.
Efficient use of land resources: Since the RAS system conducts high-density aquaculture in a relatively closed indoor environment, the aquaculture yield per unit area has been significantly increased. For example, under the traditional pond aquaculture model, only a few kilograms of aquatic products may be produced per square meter of water area, while in the RAS system, the yield per square meter can reach dozens of kilograms or even higher. This efficient use of space allows for more aquatic products to be produced on a limited land area, which is especially important for regions with scarce land resources.

II.Good control of the aquaculture environment
Stable water quality: In the RAS system, various parameters of water quality, such as temperature, pH value, dissolved oxygen content, ammonia nitrogen, and nitrite content, can be precisely controlled and adjusted. Through physical filtration, biological filtration, disinfection, and other processes, harmful substances in the water can be kept at an extremely low level, creating a stable and clean living environment for aquatic products. For example, farmed fish are very sensitive to the ammonia nitrogen content in the water. Excessively high ammonia nitrogen levels will cause serious harm to the growth and health of fish, while the RAS system can stably maintain the ammonia nitrogen content within a safe range, ensuring the healthy growth of fish.
Controllable temperature and light: The system can adjust the temperature and light of the aquaculture environment according to the growth requirements of different aquatic species. For some species with strict temperature requirements, such as the cold-water fish rainbow trout, the RAS system can accurately control the water temperature within its suitable growth range (usually 10 - 18 °C). At the same time, by simulating the natural light cycle or using artificial light, appropriate light conditions are provided for aquatic products, which helps to regulate their physiological rhythms and growth rates.

III.High-quality product quality
Good growth uniformity: In a stable aquaculture environment, the growth rate and size of aquatic products are more uniform. Different from the individual growth differences caused by environmental differences in natural environments or traditional aquaculture methods, aquatic products in the RAS system can grow under the same optimal conditions. For example, when culturing shrimp, each shrimp can obtain sufficient oxygen, suitable food, and stable water quality, ensuring that the size and quality of the shrimp are more consistent, which is very beneficial for product marketing and processing.
High product safety: Since the system can effectively control the aquaculture environment, it reduces the invasion of external pathogens and the spread of diseases. At the same time, the strict water treatment process also reduces the accumulation of harmful substances in aquatic products. For example, by using the disinfection unit to sterilize and disinfect the aquaculture water, the invasion of harmful bacteria, viruses, and parasites against aquatic products can be avoided, making the farmed aquatic products safer, healthier, and meeting high-quality food safety standards.

IV.Environmentally friendly aquaculture method
Reduction of wastewater discharge: As mentioned above, the water recycling feature of the RAS system greatly reduces the discharge of aquaculture wastewater. This not only saves water resources but also reduces the pollution of the surrounding water environment during the aquaculture process. In traditional aquaculture, aquaculture wastewater contains large amounts of organic matter, nutrients, and pathogens. Untreated direct discharge will lead to eutrophication of water bodies and ecological damage, while the RAS system effectively solves this problem through internal water treatment technologies.
Reduced ecological impact: Compared with open aquaculture, the RAS system has less dependence on the external ecosystem and causes less ecological interference to natural waters. For example, open aquaculture may cause farmed species to escape into natural waters, affecting the local ecological balance, while the RAS system conducts aquaculture in a closed environment, effectively avoiding this situation and protecting the integrity of the natural ecosystem.

Applications

I.Urban Aquaculture
1.Features: In urban environments, land resources are scarce and expensive. The advantage of the Recirculating Aquaculture System (RAS) in efficiently using space stands out. It can establish high-density aquaculture facilities in relatively small indoor spaces, such as warehouses, idle factory buildings, or even the basements of buildings.
2.Examples: Some seafood restaurants in cities, in order to ensure a stable supply of fresh aquatic products like perch and tilapia, will set up small RAS aquaculture systems near the restaurant. This not only reduces the reliance on long-distance transportation of seafood but also guarantees the freshness and quality of the aquatic products. At the same time, it can be presented as a special feature to customers.

II.High-Value Aquatic Product Cultivation
1.Features: For high-market-value aquatic products such as grouper, rainbow trout, and prawns, the RAS system can provide precise environmental control, meeting their strict requirements for water quality, temperature, light, and other growth conditions, which helps to improve the quality and yield of the products.
2.Examples: In some professional aquaculture farms, grouper is cultivated using the RAS system. By precisely controlling the water temperature between 22 - 28 °C and the salinity around 25‰ - 35‰, while optimizing water quality and light conditions, the growth rate of the grouper is accelerated, the meat becomes more delicious, and due to the stable aquaculture environment, the incidence of diseases in the grouper is reduced, thus increasing the economic benefits of aquaculture.

III.Seedling Breeding
1.Features: Seedling breeding requires extremely high environmental stability. The RAS system can precisely control key factors such as water quality and temperature, providing a good growth environment for seedlings and improving the survival rate and health of the seedlings.
2.Examples: During the breeding of shrimp seedlings, the RAS system can keep the ammonia nitrogen content in the water at an extremely low level while maintaining the water temperature within a suitable range. For example, for the breeding of Litopenaeus vannamei seedlings, the water temperature is controlled between 28 - 32 °C, which is conducive to the growth and development of the shrimp seedlings, ensuring the quality of the shrimp seedlings and providing high-quality seedlings for subsequent large-scale aquaculture.

IV.Aquatic Science Research and Teaching
1.Features: In the fields of scientific research and teaching, the RAS system provides a controllable experimental and teaching environment. Researchers can easily set different aquaculture conditions to observe the growth and physiological changes of aquatic products under various circumstances. In teaching, students can also intuitively understand the process and principles of aquaculture.
2.Examples: In aquatic research institutions, researchers use the RAS system to study the impact of fish growth hormones on growth rates. By setting different hormone levels and other environmental conditions, such as temperature and dissolved oxygen, in the system, and accurately recording the growth data of fish, theoretical support is provided for the innovation of aquaculture technologies. In school aquaculture teaching, teachers can let students operate the RAS system by themselves, such as adjusting water quality parameters and observing the feeding behavior of fish, to enhance students' practical abilities.

Technical Specifications

FAQ:

Q: Are you a factory or a trading company?
A: We are a manufacturer with a factory covering an area of 2,000 square meters and various production equipments.

Q: What is the material of the main structure of your greenhouse? How long can it be guaranteed to be used?
A: The main frame of our greenhouse is generally made of hot-dip galvanized steel. This material has super corrosion resistance. Under normal circumstances, with proper daily maintenance, its service life can reach 15 - 20 years. It can resist common natural disasters such as wind, rain, and snow pressure, providing a stable growing environment for the crops in the greenhouse.

Q: Before placing a large order, we'd like to buy a sample greenhouse to try it out first. Is that possible?
A: Yes. We can send you a small-scale greenhouse by LCL (Less than Container Load) sea shipping.

Q: I have a piece of land and I want to grow some vegetables or raise some fish, but I don't know what kind of greenhouse and what size I need. Can you help me with the design?
A: Of course. You can tell us the size of your land, your expected annual output of vegetables or fish, as well as the local climate information. Based on these data, we can design the style, size and price of the greenhouse for you. We'll also let you know approximately how many workers are needed and how long it will take to complete the installation, and how much yield you can expect in a year.

Q: Do you provide planting technical guidance after I purchase the greenhouse?
A: We have a professional planting technology team. After you purchase the greenhouse, according to the crop varieties you plant, we will customize a detailed planting plan for you, covering all aspects such as sowing time, planting density, fertilization and watering frequency, and key points of pest and disease prevention and control. During the planting process, you can contact our technicians via phone, video, etc. at any time, and they will answer your questions promptly.

Q: How long will it take to receive the greenhouse after placing an order?
A: Generally, for standard-specification greenhouses, production, transportation, installation and commissioning can be completed within 20 - 30 days after you place the order and the deposit arrives. However, if you customize special specifications or configurations, or the quantity you purchase is relatively large, it may take about 40 - 60 days. We will give you an accurate time estimate when signing the contract.

Q: What kind of assistance can you provide during the greenhouse installation?
A: We will provide several ways to help you with the installation: First, we'll provide written installation instructions; second, we'll offer online installation guidance; third, we'll dispatch engineers to your construction site for on-site installation guidance; fourth, if there is our local agent, our agent can also help you with the installation service.

Q: What are the quick solutions when encountering pest and disease problems?
A: First, our technical team will help you accurately identify the types of pests and diseases, which is the key to taking the right countermeasures. Then, according to different pests and diseases, we will provide corresponding biological control, physical control or chemical control solutions. For example, for common pests like aphids, we recommend using physical control methods such as yellow sticky traps combined with biological control methods like releasing ladybugs, so as to minimize the use of chemical pesticides, which can protect the environment while effectively controlling pests and diseases.

Q: What preparations should I make before installation?
A: First, obtain the building permit from the government if required. Second, prepare the tools according to the tool list we send you. Third, get the workers ready. Fourth, prepare the power supply if needed. Fifth, prepare a place to store the goods upon arrival to keep them from getting wet in the rain.

Q: What does your greenhouse after-sales service include?
A: We provide a one-year free warranty service. During the warranty period, for any parts of the greenhouse with non-artificial damage or quality problems caused by natural disasters, we will replace or repair them for free. After one year, we still offer long-term paid maintenance services.