Framo launches pump for aquaculture industry
Alfa Laval brand, Framo Innovation, is launching a new pump system designed to help improve fish welfare, increase growth and reduce mortality in fish farms.
The Framo AquaStream is said to provide conditions that are optimal for salmon in the cages, using increased water circulation to keep lice at bay.
“Fish farms with lice skirts often require higher water quality in the cages, particularly in localities where the natural water flow is low,” explained sales director, Terje Ljones. “Our powerful and specially designed system covers this requirement by circulating more water and providing better distribution than the current systems in use today.”
Lice skirts submerged to cover the cage sides keep salmon lice at bay, but can impair water circulation and reduce oxygen content. The deeper the lice skirts are submerged, the higher the reduction in water circulation, resulting in lower intake of feed and higher fish mortality.
The Framo AquaStream pump system is installed in the middle of the cage and pumps water directly up from depths of 20 to 25 metres – below the water layers where salmon lice and algae are found, creating circulation for the whole water column inside the installation. Framo AquaStream circulates a volume of water amounting to two swimming pools every minute.
“During the winter, when the water temperature falls close to zero degrees, the fish practically stop eating. By adding oxygen-rich water at a stable temperature, the fish have a better appetite and we see a radical improvement in growth,” added Terje Ljones.
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