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Not RAS, not net pens: Salmon farm concepts redefine barriers

As sea lice, algal blooms, temperature fluctuations and fish escapes continue to challenge salmon farmers, new cage systems have been created to address and surmount these concerns. Trondheim, Norway-based FiiZK’s semi-closed containment system (SCCS) is much like a land-based system at sea, with a cage containing a solid outer wall. Meanwhile, Kvarøy Arctic is building a new land-based facility with flow-through construction that will be up to 30 percent cheaper than a recirculating aquaculture system (RAS) when it is completed.

FiiZK worked with Cermaq Norway from 2018 until 2020 to develop and implement its first SCCS, which is essentially a large, water-pressurized bag made of a flexible polymer material that creates an impenetrable barrier between the open ocean and the inside of the pen…

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