The kill efficiencies of bacteria, mono-algae and protozoan (one celled paracites) reaches 100% within 3 seconds. As a perspective the IMO regulations for TiO2/UV based ballast water systems now require no holding time before discharge to open sea.
What is Far UVC
This Norwegian Institute of Marine Research trial was done with UVC that concluded following (We have demonstrated that sufficient doses of UVC irradiation can dramatically reduce production of infective stages from salmon lice egg strings). The test was carried out in PVC tanks with 16% reflectivity.
Our Biotunnel is lined with optical film that makes it a gigantic UV reactor with 12.000m² surface area creating huge amounts of OH Radicals.
The extremely high OH Radical production fills the Biotunnel completely with OH Radicals without any shadow areas resulting that all passing fish will be treated completely. Both salmons and trouts have UV receptors that can see the unvisible UV light and will be drawn to it. The units can be on 24/7 and do not do any damage to fish eyes or skin. It will take longer time for all fishes to pass through the tunnel but the treatment will be far better. Pancreatic disease (PD) and infectious salmon anemia (ILA) will also be eliminated. The high concentration of OH Radicals will also kill adult sea lice.
The maximum permissible Far-UVC exposure according to current EU regulations is 30 mJ/cm² in 8 hours. Despite the fact that this norm is established for the entire UV spectrum of radiation, it is quite sufficient for disinfection.
Size and power
Tunnel size is 1200mm internal diameter and a 6 meter unit weight is around 350kg, the tunnel walls have floating elements and is balanced with water and air.
Power usage for a 6 meter single unit is 12VDC 480 Watt.