Contact
Hydrotech AB

Mejselgatan 6
235 32 Vellinge
Sweden
Tel. +46 40 42 95 30
Fax +46 40 42 95 31

Recirculated Aquaculture Systems (RAS)

Hydrotech filters in a RAS for smolt production, Chile

Fish farming in recirculated systems are one of the most expanding ways of producing fish and other species for the aquaculture industry.

A key point in a successful RAS installation is particle control. Compared to competing technologies Hydrotech filters ensures a gentle and immediate removal of particles. Over 90% removal is possible in our filters!

That is VERY efficient, but a lot of issues must be considered when designing RAS, otherwise particles may be dissolved or destroyed before they reach the screen.

► Choice of filter opening in micro screen
► Shape of the tanks outlets
► Stocking densities of fish
► Pipes and distance to micro screens
► Aeration in tanks for oxygen supply
► Type of feed

Besides from removing major loads off the biofilter, the screen also makes an absolute filtration removing parasites in the recirculation loop. In some installations like Eel farms, this feature has become a crucial success factor.

Hydrotech has a team of biologist and engineers available for support for optimal use of our filters in RAS projects.

You can find more about filtration is RAS in our application note here: Hydrotech filters in recirculated systems