OceanSaver has supplied and commissioned its first ballast water treatment system to gain classification society DNV’s approval as a retrofit installation.

The project was completed over the summer of 2011 on the car carrier ‘Höegh Trove’, operated by Höegh Autoliners and managed by Höegh Fleet Services. The installation precedes the mandatory requirements of the IMO 2004 International Convention for the Control and Management of Ships’ Ballast Water and Sediments to prevent the spread of marine invasive species via ballast water. DNV’s approval process involved detailed evaluation of every aspect of vessel safety including the new power balance of the vessel, stripping procedures for the ballast tanks, hydrogen evacuation from the disinfectant units and the thorough testing of ballasting sequences.

The system installed on ‘Höegh Trove’ is fully integrated with the ship’s existing automation system and is capable of handling ballast water at a rate of 1,000m3/h. It is based on OceanSaver’s MKI technology, which includes filtration, cavitation, disinfection and nitrogen super saturation as treatment stages. Another nine OceanSaver systems are planned for installation on Höegh vessels over the coming years.

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