Protecting a commercial salmon hatchery

Grieg Seafood in Canada took proactive action against the potential threat of disease by installing Hanovia Photon IIUV disinfection systems at its British Columbia Atlantic salmon hatchery

The threat of disease is one of greatest dangers to a commercial hatchery.

With the company emphasis on the welfare of its farmed fish, a regard for the environment, and a commitment to avoid the use of medicines, Hanovia equipment was a natural choice; the systems require no chemicals, have no residual effect on the treated water, and are simple to operate.

UV treatment is ideally suited to treat the diseases that can threaten the farm stocks of commercial hatcheries; it is effective against a wide range of pathogens including Furunculosis (Aeromonas salmonicida), Infectious Salmon Anaemia (ISA), Viral Haemorrhagic Septicaemia (VHS) and Infectious Pancreatic Necrosis (IPN).

Over the past several years, its use has become more widespread as fish farmers recognise it as the most economical disinfection technique for aquaculture.

Because Hanovia systems use no chemicals, the expense of complex monitoring systems needed for chemical disinfection of feedwater is eliminated.

In addition, UV treatment does not alter the pH of the water or produce any harmful by-products.

The Grieg hatchery stock of Atlantic Salmon is protected by three Hanovia Photon II systems, which disinfect the incoming feed water.

The systems are configured as two duty and one standby.

The standby system provides duty in the unlikely event of system breakdown or during scheduled maintenance of a duty system.

An automatic wiper mechanism prevents the build-up of deposits on the quartz tube, ensuring optimum UV dose at all times.

The system control panel provides the operator with data on flow rate, UV dose and intensity.

Up to one year of this performance data can be logged by the control unit for download.

Maintenance of the unit is limited to the periodic replacement of the UV lamps, a simple operation that can be carried out by on-site staff.

To date, Hanovia and its sister companies have installed over 300 aquaculture systems in 19 countries around the world.

Applications include water treatment in hatcheries, shellfish depuration tanks and fry rearing tanks as well as treating re-circulation water in marine parks and aquaria.

Hanovia systems provide water disinfection for flow up to 900 m3/h in a single chamber, dependant upon water quality.

Scope of supply: Three systems, Photon PMD320K6/10, including automatic quartz cleaning system, plus duty / standby operation.

The main target organism on this site was Furunculosis (Ameromonas Salmonicida).

Total Flow: 900 m3/h.

Transmittance: 88% in a 10 mm cell.

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