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BIOTEK2021-Bioteknologi for verdiskaping

ERA-NET: Secondary bioprod. of low trophic organisms utilizing side streams from Blue & Green sectors to prod. feed ingredients -SIDESTREAM

Alternativ tittel: SIDESTREAM

Tildelt: kr 7,4 mill.

To which extent is it possible to recycle nutrients from aquaculture and agriculture waste by secondary bio-production? Which organisms and approaches are best suited? Can these organisms serve as ingredients for feed stuff? How safe are feed ingredients produced on waste? What is the market potential and economic feasibility of feed ingredients produced following sustainable circular principles? SIDESTREAM addresses these questions to push forward the frontier for production of high value compounds by utilization of low trophic marine invertebrates and bacteria, which will be reared on waste streams following circular principles. Several industries are in demand for high value compounds such as marine-originated lipids, proteins and pigments such as astaxanthin. Omega-3 long-chain (>C20) polyunsaturated fatty acids (n3 LC-PUFA) are marine lipids that are abundant in fish oils and fish meals (marine ingredients). n3 LC-PUFA in aquafeeds ensures both growth and health of farmed species and their nutritional value for consumers. Aquaculture is by far the largest consumer of marine ingredients thus requiring novel high nutritional quality ingredients to critically ensure sustainable expansion. Additionally, there is a trend towards natural bioactive compounds such as astaxanthin as a natural bioactive stimulant (nutraceutical), which adds value to the resulting feed. SIDESTREAM partners have shown that polychaetes and crustaceans can produce n3 LC-PUFA de novo. Such striking capacity will be exploited in SIDESTREAM. We will take side streams from aquaculture, agriculture and biogas sectors, and produce polychaetes and gammarids on the solid phase and bacterial astaxanthin on the liquid phase. Biomasses will be processed and tested as feed ingredients for fish and shrimp during all life stages. SIDESTREAM cutting-edge approach will enable value creation from resources hitherto considered as waste, allowing for innovation and sustainable use in aquaculture. During the first year of the project several experiments on optimization of cultivation and fatty acid production of polychaetes and gammarids have been conducted by SINTEF Ocean. To enable the project to investigate temperature effects on fatty acid production, a temperature gradient table has been built. As the first effort using this device, the combined effect of cultivation temperature and different side stream combinations (mixes of solid biogas digestate (SBD) and salmon sludge (SS)) on growth and fatty acid composition has been investigated in polychaetes. Growth was significantly influenced by temperature, and to a lesser degree by feed type. The combination of a mix of 66% SBD and 33% SS at around 15°C resulted in highest growth rates. Temperature had no effect on fatty acid composition of the worms, but the feed type did, with worms basically resembling the fatty acid composition of the feed. A similar experiment has been conducted on gammarids. They grew at the highest rates at elevated temperatures on pure SBD. After having digital meetings only, the project group had a physical meeting for the first time. This meeting was held alongside the European Aquaculture Society meeting on Madeira, were first project results also have been presented. The project group concluded that the project progress clearly is affected by the pandemic, but will still be able to deliver the expected outcomes. More information on the project can be found at www.sidestream.info.

To which extent is it possible to recycle nutrients from aquaculture and agriculture waste by secondary bio-production? Which organisms and approaches are best suited? Can these organisms serve as ingredients for feed stuff? How safe are feed ingredients produced on waste? What is the market potential and economic feasibility of feed ingredients produced following sustainable circular principles? SIDESTREAM addresses these questions to push forward the frontier for production of high value compounds by utilization of low trophic marine invertebrates and bacteria, which will be reared on waste streams following circular principles. Several industries are in demand for high value compounds such as marine-originated lipids, proteins and pigments such as astaxanthin. Omega-3 long-chain (=C20) polyunsaturated fatty acids (?3 LC-PUFA) are marine lipids that are abundant in fish oils and fish meals (“marine ingredients”). ?3 LC-PUFA in aquafeeds ensures both growth and health of farmed species and their nutritional value for consumers. Aquaculture is by far the largest consumer of marine ingredients thus requiring novel high nutritional quality ingredients to critically ensure sustainable expansion. Additionally, there is a trend towards natural bioactive compounds such as astaxanthin as a natural bioactive stimulant (nutraceutical), which adds value to the resulting feed. SIDESTREAM partners have shown that polychaetes and crustaceans can produce ?3 LC-PUFA de novo. Such striking capacity will be exploited in SIDESTREAM. We will take side streams from aquaculture, agriculture and biogas sectors, and produce polychaetes and gammarids on the solid phase and bacterial astaxanthin on the liquid phase. Biomasses will be processed and tested as feed ingredients for fish and shrimp during all life stages. SIDESTREAM cutting-edge approach will enable value creation from resources hitherto considered as waste, allowing for innovation and sustainable use in aquaculture.

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BIOTEK2021-Bioteknologi for verdiskaping

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