A research initiative is underway to utilize carbon dioxide emissions from refining plants in the production of feed for farmed salmon. This effort involves the use of microalgae, which absorb CO₂ and are then incorporated into salmon feed.
Currently, feeding trials are being conducted to raise salmon from juvenile to harvest size using this algae-based feed. While there are still technical challenges, the salmon have shown good growth and remain in healthy condition. Moreover, results indicate that the use of algae-based feed reduces the incidence of sea lice infections.
The algae are cultivated in large tanks, into which CO₂ from the refining plants is directed. Once grown, the algae are delivered to feed manufacturers for the development of new feed formulations. While conventional salmon feed contains about 3% algae, the new feed has successfully incorporated up to 15%. Higher algae content has been linked to improved growth and survival rates in salmon.
This initiative is gaining attention as a new effort within the aquaculture industry, especially from the perspective of the SDGs (Sustainable Development Goals).
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