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

The first line of defense in the RAS system, removing solid particles like uneaten feed and feces. Utilizes mechanical filtration equipment such as drum filters with precision around several tens of micrometers to protect downstream components.

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

Ensures sufficient oxygen supply through microporous aerators or pure oxygen aeration devices. Maintains optimal dissolved oxygen levels even in high-density aquaculture conditions.

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

Enables high-density aquaculture in limited urban spaces like warehouses or building basements. Used by seafood restaurants for fresh supply of perch and tilapia with reduced transportation needs.

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

Maintains critical stability for shrimp seedling development, controlling water temperature (28-32°C) and ammonia levels to ensure high survival rates and healthy growth.

Offers controlled experimental environments for studying growth hormones and aquaculture principles, with precise parameter adjustment and data recording capabilities.

• Round shape design minimizes water flow dead zones
• Diameter options: 2 to 30 meters
• Standard height: 1.45m (1.3m water depth), customizable
• Material: 1mm galvanized steel (80g/m² coating) with 750gsm PVC lining
• Includes bolts, nuts, fixing ropes, and fish waste drain outlet