New technology turns all fish into food

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In the meat industry, it is common practice to turn animals into food. In the fishing industry, more than half the weight of fish ends up in the form of side streams that never reach our plates. This affects the environment and is not in line with Swedish food and fishing strategies. Now food researchers from Chalmers are introducing a new sorting technology, which means we get five good slices of fish, not just fillets. A herring processing plant on the west coast of Sweden is already introducing a new method.

When the fillet itself gets out of a fish, remain valuable side streams that can be converted into foods such as nuggets, minced meat, protein isolates or oils rich in omega-3s. Despite such great potential, these products are leaving food chain become animal feed or, at worst, be discarded. To use valuable nutrients and switch to more sustainable treatments, you need to change the way you handle fish.

All cuts are treated carefully

“With our new sorting method, all fish are placed with the same care as fillets. The focus is on maintaining quality throughout the value chain. Instead of placing different by-products in one hopper to become by-products, they are processed separately, as in meat industry“- says the head of the study Ingrid Andland, Professor of Food Science at the Department of Biology and Biological Engineering in Chalmers.

The study was conducted as part of an international project called Waseabi. Chalmers researchers recently published their findings in a scientific journal, Food chemistry.

“Our research shows that this type of sorting technology is important, in part because it means we can avoid mixing perishable slices with more stable cuts. This new method provides new opportunities for producing high-quality food,” says Chalmers researcher Haizhou Wu. , the first author of a scientific article.

“Interest is”

One of the partner companies of the research project is introducing a new sorting method to separate five different sections. A fish processing company, Sweden Pelagic in Elos on the island of Orust already uses parts of the method in its production and has given good results.

“Sorting technology gives us much more opportunities to develop healthy, new and delicious products and expand the range. This year, we estimate we will produce about 200-300 tons of minced meat from one of the new slices, and we aim to increase that figure from year to year. Interest is in food industry and catering production segments such as school meals, ”says Martin Culin, CEO of Sweden Pelagic.

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Additional information:
Haizhou Wu et al., Oxidation of lipids in assorted herring (Clupea harengus) fillet joint products from two seasons and its relationship with the composition, Food chemistry (2021). DOI: 10.1016 / j.foodchem.2021.131523

Citation: New technology turns all fish into food (2022, June 28), obtained June 28, 2022 from

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