ADVANTAGES OF RECIRCULATING AQUACULTURE SYSTEM

The advantages of farming in RAS are:

• Fully controlled environment for the fish
• Low water use
• Efficient energy use
• Efficient land use
• Optimal feeding strategy
• Easy grading and harvesting of fish
• Full disease control

CONSTRAINS OF RECIRCULATING AQUACULTURE SYSTEMS

To allow the use of RAS grow outs, there are a few constraints in respect of infrastructure, feeds and staff:

• Necessity for electricity 24/7
• Good water source, preferably borehole
• Good fish feed quality, preferably high protein and fat extruded diets with high digestibility
• Technically skilled staff able to work in a medium tech environment

Recirculating Aquaculture System grow outs are the best option for locations close to or in cities, with good availability of electricity. Next to this, using RAS technology is the only possibility for farming tropical fish species in moderate to cold climates indoor.

BASIC PRINCIPLES OF A RECIRCULATING AQUACULTURE SYSTEM

A basic Recirculating system consists of the following components:

• Fish tank
• Mechanical Filter
• Biologicial Filter
• Pump tank
• Pump
• Other items (e.g. UV-C light, oxgenation devices, aeration devices, feeders, monitoring, etc.)