Posted by: marineharvestcanada | February 25, 2010

Recirculation innovation at Sayward North

It is an exciting time in MHC Freshwater. Construction has begun on Sayward North’s new turnkey recirculation system provided by InterAqua Advance from Denmark. This will be the first of their systems in North America. Work began with falling the trees, removing the stumps and scraping off all of the organic layer. The next step involves excavating the site to the base of the footings and tanks to begin the concrete work and the installation of the pipe work. Construction of the building is scheduled to begin the middle of March with the completion of the first system by July 1st.

The new building will house two separate systems each designed to recirculate an incredible 99.1% of the water. Each system will contain four 12m tanks which will flow into a treatment facility with two 4m deep bioreactors which are the heart of the InterAqua Advance system designed to convert toxic ammonia into safe nitrate, digest fine organics, degas off excess carbon dioxide and saturate the water with oxygen, exciting isn’t it! The water is then pumped back to the tanks with a small side stream of the water being supersaturated to help meet the oxygen requirements of the fish.The existing Hatchery uses approximately 15,000 Lpm of water to produce 1.8 million smolts. The new recirculation systems will triple the smolt production of the site using only an amazing 600 Lpm of new water while increasing smolt size and quality at the same time.

We look forward to continuing to work together with our Danish colleagues to make this project a success. We are all eager to have the project progress to the operational phase with the first fish scheduled to be added to the system already being first fed in the Hatchery. Between now and then, there is a lot of work to be completed but there’s no turning back now!

By Phillip Redmond, FW Technical Operations Manager

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