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Process waters from the seafood industry contain valuable nutrients, that could be used in food or aquaculture feed. But currently, these process waters are treated as waste. Now, a research project from Chalmers University of Technology, Sweden, shows the potential of recycling these nutrients back into the food chain.
During preparation of herring, shrimps and mussels, large amounts of process water are continuously pumped out as waste by the seafood industry. The water is used when boiling shrimps or mussels, or when filleting, salting and marinating herring, for example. Approximately 7000-8000 liters of water is used to prepare a ton of marinated herring, whilst a stunning 50,000 liters of water is needed per ton of peeled shrimps, or per three tons of raw shrimps.
Stream - Waters - Proteins - Peptides - Fats
But these side stream waters contain proteins, peptides, fats and micronutrients, which could be recycled and used, for example by the food industry, as an ingredient in feed or for growing microalgae. In fact, the leftover boiled water from shrimp preparation is basically a ready-made stock.
The Nordic project Novaqua, coordinated by Professor Ingrid Undeland of the Department of Biology and Biological Engineering at Chalmers University of Technology, has now shown the potential of extracting these important nutrients from the process waters.
Industry - Understand - Side - Streams - Material
"It's very important to help the industry understand that the side streams don't need to be wasted. Instead, they should be treated as really exciting raw material," she says.
"The backbone of our project is a circular approach. In the past, we had a more holistic view on handling of food raw materials, but today so much is lost in side streams. Furthermore, we are in the middle of a protein shift, and there's a huge demand in society for alternative protein sources."
Research - Project - Aim - Nutrients - Seafood
The research project started in 2015 with the aim to recover nutrients from seafood process waters and...
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