In a recirculating aquaculture system the culture water is purified and reused continuously. ... The purified water is subsequently saturated with oxygen and returned to the fish tanks. By recirculating the culture water, the water and energy requirements are limited to an absolute minimum.

How does a recirculation aquaculture system work?

Recirculating aquaculture systems (RAS) operate by filtering water from the fish (or shellfish) tanks so it can be reused within the tank. ... The company's filtration systems operate continuously, keeping the water clean and providing a healthy environment for the fish.

What is the role of plants in a recirculating aquaculture system?

Dissolved nitrogen, in particular, can occur at very high levels in recirculating systems. Fish excrete waste nitrogen, in the form of ammonia, directly into the water through their gills. ... The plants remove nutrients from the culture water and eliminate the need for separate and expensive biofilters.