Environmental and climatic changes require a world-wide search for new solutions. Recirculating aquaculture system (RAS) is characterized by high premium quality fish productivity on relatively small scale with high density and high rate of growth within controlled environment. Disease exposure reduction, continuous control and low death rate are the advantages of the system. Water is pretreated till its desirable quality. The volume of stabilized sewage is minimized and constantly supervised.

Nine reasons to fish-farm in RAS

1.  Premium class product

RAS is a perfect environment for fish as a risk of system contamination with chemicals, pesticides and heavy metals is eliminated. Thus, fish acquires high consumer appeal which enables to market it as a premium product at a thoroughly high price.  

2.  Any species of fish

It is of little significance where to construct RAS. Whether it is in the north or within southern latitudes, there will always be a possibility to create suitable conditions for maximum fish growth.

3. Only healthy fish

Disease exposure of fish is a great issue. Using RAS, you completely eliminate any infections or parasites penetrating into the system. Tap water as well as artesian water is used in RAS. Fish is fed with expansion extruded feed the temperature of which reaches 140ºС during its processing. The system is located indoors. Therefore, if the technology process is followed, fish is isolated from any disease-producing factors.

4.  Profit with comfort

Fisheries’ overheads on disposal of goods (transportation, maintenance of live fish, sales) usually refer to 25-30% of net cost. Remoteness of fish ponds from the market is the main reason. Your money can be saved if you put up RAS close to an authentic Korean fish restaurant where your production will be successfully disposed without extra costs or issues.

5.  Additional profit

Carbon dioxide is emitted while RAS is operated which induces the necessity to ventilate premises. Greenhouse complexes require CO2. A greenhouse can be constructed and emitted during RAS operating CO2 can be used. This technology is called aquaponics. The integration of a fishery and a greenhouse will enable to reduce the production net cost.

6.  Minimum expenses

As for RAS, 20-30% less water is wasted on a kilo of grown fish than during its natural reproduction. As a result, lower costs and ecology awareness are maintained. Therefore, in Israel fish is grown only in RAS systems. More than 60% of fish net cost refers to feed costs. While farming in RAS, feed consumption is three times reduced. This is explained by a comfort temperature of water throughout a whole year of fish-farming and high amount of oxygen in the water.

7.  No seasonality

Fish-farming in ponds has its own seasons which implies periods of massive fishing and sales. During this period prices on fish are the lowest while competition among fisheries is high. Fish-farming in RAS enables you to dispose the production throughout a whole year in a beneficial quantity. In addition to that, you can analyze the periods of the highest demand and prices (these periods are common for New Year and other holidays) and a sell much more expensive product.

8.  Short term of production

In RAS fish grows three times faster than in natural reservoirs as RAS forms a particular amount of macro and micro elements in the water and high concentration of oxygen necessary for intensive growth and development of fish. As a result, you get a healthy premium quality product for sale in less time.

9.  High ecological compatibility

Traditional ways of fish-farming highly affect the environment which is polluted with infections, residuals of chemical or pharmaceutical products, feed waste and fish by-products. Because of the mechanical and biological filtration system and low water consumption RAS minimally affect the environment. The integration with a greenhouse complex almost excludes any environmental damage.

Data on the project:     

  • The size of premises– 30*12*3,5 m    
  • The dimensions of fish-farming ponds– 102 m3
  • Water requirements – 15m3/day and night
  • Equipment installed capability – 18,2 kW   
  • Oxygen  requirements – 43 200 liters/day and night       

Technological infrastructure of the project

The project is stocked with:  

  • Reliable equipment of high quality with long term working lifespan         
  • Automatic checkout and control systems  
  • Equipment for industrial water filtration of RAS         
  • Energy-conserving pumps        
  • Oxygen-servicing equipment  
  • Biofilters
  • Equipment for industrial water decontamination  
  • Ponds of high quality plastic material·  
  • Spare parts      
  • The project involves Technical Expertise Appraisal