Utilising CO2 for fish food

Utilising CO2 for fish food


Scientists are trying to capture and utilize CO2 instead of releasing it into the environment, as CO2 is the main contributor to global warming. Mongstad refinery in Norway has developed a unique method that will utilize released CO2 into growing nutrient-rich algae, which can be used as feed for fish.

Scientists at the Technology Centre Mongstad are trying to use excess CO2 to grow a few key strains of algae, which also happens to be a rich source of omega-3, a vital ingredient for feeding farmed fish.

Experts predict the world’s food production will have to rise 70 percent by 2050 to keep up with a growing population. Fish farming is a great way to grow more protein, but the practice requires omega-3, to feed and produce healthy fish, and omega-3 typically comes from fish oil and by capturing krill. That puts pressure on the marine food chain and is ultimately unsustainable. Scientists hope that this new method of recycling CO2 will lead to, a large-scale way of mining the crucial, fatty oil.

 “The CO2 goes into a tank with seawater and algae mass, and it’s mixed with a bioreactor system,” explains Svein M. Nordvik of CO2Bio, a company in Mongstad involved in the study. After approximately 10 days, biomass is generated which can be used as fish-food.

Capturing carbon and using it for things like fish farming might sound like an ideal way to tackle climate change.