FAR UVC Tunnel

Sea Lice, biofilm and viruses is a constantly hazzle for the aquacultur industry but can be drastically reduced by Far UVC, OH Radicals and Peroxyl Radicals

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

Far UVC is the first UV based product to provide continuous disinfection in farming, aquaculture and where people live, work and play safely and effectively. Destroys aerosol pathogens (virus, bacteria, protozoan, prion, viroid and fungus) directly in the air. Equally effective for sterilizing surfaces. Is safe to use in any environment, no harm to people, animals or plants. More common bacteria as Salmonella, Listeria, Campylobacter, and Staphylococcus aureus will also be killed. 

Far UVC eliminate the need of de lousing and reduces use of antibiototica and prevents drug-resistant organisms and creation of super bugs, Far UVC is in addition more than 10 times more efficient than todays UVC. Used in water, issues like biofilm will be history in addition to a clean and healthy water supply. 

222nm Far UVC vs 254nm UVC
The majority of UV treatment is performed with LPM UVC lamps at 254nm in medical, academic, and industrial fields. However, 254nm UVC lamps have potential drawbacks, such as the possibility of mercury leakage, a short lifetime, and significant energy requirements, which limit their application and further development. In contrast, 222nm UVC excimer lamps have higher irradiance and stronger microbial killing effects with shorter irradiation time, and can overcome the various inferiorities of 254nm UVC lamps.

The disinfection effect of the 222nm excimer lamp is significantly stronger than that of the 254nm UVC lamp, as it requires 5–10 times less irradiance dose to achieve almost the same disinfection effect. This means that the 222nm excimer lamp achieves the same level of disinfection in a much shorter time compared to the 254nm UVC lamp. Additionally, a study found that the disinfection effect of the 222nm UVC excimer lamp on bacteria in different media varied slightly, with slightly longer exposure times needed for bacteria in TSB.

Biotunnel Hilights

1.  ORP Transmitter secure full control of OH Radical production

2.  The kill efficiencies of bacteria, mono-algae and protozoan (one celled paracites) reaches 100% within 3 seconds.

3.  Injection of nanobubbles increase and lengthenes the effect by increasing OH radicals and packing the salmons in a nanobubble film that avoids sea lice to attach

4.  Nanobubbles is generated from pure water without any external gas source with only 300W power usage

5.  Nanobubbles keeps the optical film clean for 100% efficiency
6.  Camera gives visual control of efficiency

7.  Green LED lights for additional fish attention

8.  Remote depth control with depth sensor from above waterline makes it easy to adjust depth

9.  High pressure POM fittings able to withstand 48 Bar water hammer 

10.12.000 m² active optical film area

Algae Blooms
These units is perfect for to knock down algae blooms, a device that is towed through an algae belt in 5 knots will process 11.300 m3/hour and 271.200 m3/day with 160 Watts power usage, 4 units linked together processes 45.200 m3/hour and 1.084.800 m3/day with 640 Watts power usage.

ISAV (Infectious salmon anaemia virus)

ISAV will be inactivated by Far UVC.

Amoebic Gill Disease, IPNV (Infectious pancreatic necrosis virus) and Sea Lice

These problems needs more attention and with the optical film coated tunnel OH radicals will be created, this will inactivate Amoebic Gill Disease and IPNV. And also aid in sea lice prevention, sea lices will be mechanical paralysed when bubbles form in the gut and haemolymph and cause the sea lices to release and float to the surface (this is actually the same result as when OH radicals is generated by use of hydrogen peroxide).

OH Radikals

The optical film increses the production of OH Radicals and is maximized due to the enormes active area, the internal area is 24 m² that equals a 12.000 m² OH Radical producing area.

Vestflow Biotunnel

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.