The Recirculating Aquaculture System (RAS) is an industrial aquaculture model that enables water recycling through advanced water treatment technologies including physical filtration, biological filtration, oxygenation, and disinfection. This closed-loop system simulates natural ecosystem processes, converting organic wastes into harmless substances while maintaining stable water quality for optimal aquatic growth conditions.

The first line of defense in RAS systems, removing solid particles like uneaten feed and feces. Utilizes mechanical filtration equipment including drum filters and microstrainers with precision filtration around tens of micrometers.

Core component using microorganisms to decompose harmful substances like ammonia nitrogen and nitrite. Features biofilter media (ceramic rings, biochemical balls) that provide attachment sites for nitrifying bacteria to convert ammonia into nitrate.

Ensures sufficient oxygen supply through microporous aerators or pure oxygen aeration devices, meeting high-density aquaculture oxygen demands.

Eliminates pathogens using UV disinfection or ozone generators. UV damages pathogen DNA while ozone's strong oxidation kills microorganisms without harmful residues.

• Efficient Water Use: Recycles >90% of water compared to traditional aquaculture
• Environmentally Friendly: Minimizes wastewater discharge and natural water pollution
• High-Density Cultivation: Maximizes yield per unit area in limited spaces
• Controllable Environment: Precise regulation of water temperature, dissolved oxygen, and pH
• Disease Prevention: Reduced pathogen transmission through strict water treatment
• Space-Saving: Compact indoor facilities ideal for land-limited areas
• Economic Benefits: Improved efficiency and product quality for higher returns

Ideal for space-constrained urban environments, enabling high-density aquaculture in warehouses, buildings, or restaurants. Ensures fresh supply while reducing transportation needs.

Perfect for premium species like grouper and rainbow trout, providing precise environmental control (22-28°C water temperature, 25-35‰ salinity) to enhance quality and growth rates.

Maintains optimal conditions (28-32°C for shrimp seedlings) with stable water quality, improving survival rates and seedling health for commercial aquaculture.

Provides controlled environments for scientific studies and hands-on aquaculture training, enabling precise parameter adjustments and growth monitoring.