Recirculating aquaculture systems (RAS) provide a rearing medium that is constant and adjustable, with only slight and slow variations. The systems work to control the different water quality parameters, i.e. temperature, oxygen, nitrogen, pathogens. Thus, RAS has contributed to a more intensive and reliable production, and at the same time has led to significant savings in energy needs.

The objectives of the course are to review the basis of RAS and examine the different systems, designs, operations and application of RAS, with special emphasis on Mediterranean aquaculture.