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RAS

Aquaculture systems are generally based on the system of exchanging a relatively small portion of the actual culture medium per unit time. This mechanism is called Recirculating Aquaculture Systems.

RECIRCULATING AQUACULTURE SYSTEM

The function of land based aquaculture systems is provided by the re-circulation mechanism. Aquaculture is always based on flow-through technology. Inlets and outlets in the system move opposite each other, which allows the development of water organisms. Such systems treat water only once. Recirculating aquaculture systems may be closed or partially closed. The wastewater generated in these systems is treated for re-use and re-distributed.

Aquaculture systems are generally based on the system of exchanging a relatively small portion of the actual culture medium per unit time. This mechanism is called Recirculating Aquaculture System. It is expected that aquaculture circulation systems will increase in the future in order to comply with water waste restrictions applied in the field.

Aquaculture circulation systems are generally composite systems that combine tanks and water treatment units for fish maintenance. The water in the tanks is renewed every few hours. In this way, the water remains clean at all times and also prevents toxic wastes such as amanioc in the water from damaging the growing fishes. Even if a new water supply is needed continuously, a healthy aquaculture re-circulation system puts 95% of the used water back into use. Another purpose of water treatment is to remove waste and optimize the amount of oxygen in the tanks.

DETAILS

ADVANTAGES


  • There is a stable production of high quality fish all year round.
  • It requires low water.
  • The production of quality fish is high, in a relatively restricted space.
  • The risk of diseases is reduced.
  • Low mortality rate.
  • There is continuous control and monitoring of the system.
  • It does not affect the environmental in any ways.
  • Intake and effluent is reduced to the minimum.
  • There is special treatment of water disposal.

DISADVANTAGES


  • It depends on regular power supply and control.
  • A need for start-up capital for premises, technical installation and running cost is necessary.

APPLICATIONS


The main applications of Recirculating Aquaculture Systems consist fish production units of several different kinds of species:

  • Tilapia
  • Salmon
  • Shrimp
  • Trout
  • Sea Bass
  • Sturgeon
  • Sea Bream

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