The facility consists of two departments: Start-feeding and Grow-out. Each department has its own separate water treatment system, running on clean freshwater.
In addition to this, the facility has vacuum-run equipment for dead fish transport and a sludge treatment system to dewater the waste sludge. All the equipment is under observation via cameras placed in each department hall.
The Kaldnes® RAS water treatment system consists of four major process components:
Mechanical Particle Separation
The Hydrotech™ drumfilters remove particles and suspended matter from the water, both from fish feed and fish feces
Dissolved and particulate organic matter and ammonia are degraded by bacteria and microorganisms in a two-stage Kaldnes® MBBR biofilter.
Carbon dioxide produced by fish respiration is removed in a centralized CO2 degasser.
The entire facility, including the water treatment systems, lighting, oxygen and heat, is monitored and controlled by Veolia’s operating control system.
The two Kaldnes® RAS systems together have a capacity of 1.556 kg daily feeding, with a total hydraulic capacity of 2.875 m3 /h. They occupy a footprint of 176 m2 (including the switchboard) which is a mere 12% of the total hall area.
|Total fish tank volume||339 m3||1.272 m3|
|Maximum biomass||11.875 kg||63.617 kg|
|Maximum feeding||356 kg/døgn||1.200 kg/døgn|
|Recirculating water flowrate||675 m3/time||2.200 m3/time|
Client: Osland Settefisk AS
To build a turnkey RAS facility with a highly constrained footprint.
Kaldnes® RAS consisting of Hydrotech™ Drumfilters, Kaldnes® MBBR, central CO2 degasser and circulation pumps. The facility is monitored and controlled by VA-operator, a fully automated control program
2,5 million smolt per year
356 + 1.200 kg per day
Fish tank volume :
339 + 1.272 m3
CO2 ut av kar: ≤15 mg/l
TAN: ≤ 2 mg/l
NO2-N: ≤ 0,5 mg/l
NO3-N: ≤ 70 mg/l
Nitrogen saturation: ≤ 100 %