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BIONÆR-Bionæringsprogram

Conversion of salmon by-products to high-value ingredients of growth media for probiotic bacteria

Tildelt: kr 1,7 mill.

Rest raw materials (by-products) from the marine aquaculture industry are a little utilized resource, with a vast potential due to the presence of valuable polyunsaturated lipids, rare anti-oxidants and large amounts of protein. Recent developments in the applicant?s and other European laboratories indicate that fastidious probiotic bacteria like lactic acid bacteria and bifidobacteria grow very well on media based on hydrolyzed fish by-products. Parallel optimization of conditions for by-product processi ng and conditions for growth of these food-grade bacteria may result in commercially feasible methods for developing probiotic ingredients to be used in food or feed applications. An additional advantage of fish hydrolysates as source of peptones and oth er important ingredients concerns their kosher status and the fact that they are free of components derived from meat or from plants that may be genetically modified. Finally, marine raw materials are an excellent starting point for enzymatic biopoprocess ing because they (as opposed to terrestrial raw materials) usually do not contain microbes that survive at the (moderately high) temperatures used during typical enzymatic processing steps. This project aims at optimizing procedures for enzymatic hydrolys is of fresh salmon by-products under mild conditions and to explore the potential of the resulting hydrolysates for production of probiotic bacteria with a documented potential for use in commercially interesting applications. We will particularly focus o n (1) standardizing hydrolysis procedures, (2) identifying key quality parameters other than peptide and amino acid content (e.g. lipids, antioxidants), and on (3) growing the most fastidious (and promising) probiotic bacteria, especially bifidobacteria a nd lactobacilli. The project will be conducted in close collaboration with a major salmon production company and its industrial network.

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BIONÆR-Bionæringsprogram