ARTICLE F&A Alternative Proteins Edition October 2023 43 SALMONID FEEDING TRIAL RESULTS Early prototypes of a single cell protein produced by researchers at the DSM Bioscience Centre in Delft, The Netherlands showed excellent performance comparable to feeds containing fish meal and soy protein concentrate. Rainbow trout were grown for 12 weeks on different inclusions of SCP ranging from 0%, 5%, 10% to 20% on extruded feeds, with single cell protein replacing a combination of fish meal and soy protein concentrate. The data is shown in Figure 1, indicating that single cell protein inclusion has no negative impact on fish performance measured by final body weight. Single cell protein is not only a sustainable solution for aquaculture, livestock and companion animal feed, but also a potential driver for decarbonization and circular economy. Single cell protein production can be powered by renewable energy sources such as solar, wind, or biogas, and it can capture and convert carbon dioxide into biomass. Single cell protein is one of the key innovations that can help the aquaculture industry achieve its sustainability goals, such as science-based targets (https:// sciencebasedtargets.org/) and contribute to global food security. Single cell protein production has the potential to be net zero for the aquaculture industry in terms of carbon emissions and resource usage. This means that its production does not contribute to the increase of greenhouse gas emissions or consume a significant amount of non-renewable resources. Whilst aquaculture feeds have reduced their dependency on marine ingredients from fisheries and trimmings there is still a significant reliance on soy protein. Availability of novel raw materials rich in protein would bring with it stability of supply and economics as the aquaculture industry grows. If the production of novel protein raw materials at scale with market conditions was easy, we would have these technologies available today. It will take industry-wide commitment and capital investment, possibly co-investment by stakeholders to make this a reality. Collaborating across the value chain is key to drive the continued sustainable production of aquaculture, every member of the value chain has a role to make this happen and enable production at scale of single cell protein. About Dr. Louise Buttle Dr. Louise Buttle is an aquaculture professional with over 25 years’ experience in the industry. After completing a PhD at the University of Hull on the physiology of nitrogen excretion in the African catfish, Dr. Buttle joined EWOS Cargill. Whilst employed by EWOS Cargill, Buttle held various roles in R&D, product development and sustainability in global teams for the business in Scotland, Chile and Norway. Working in these salmon countries also provided Louise Buttle with a unique perspective and experience of the salmon industry. Today, Dr. Buttle is working in the Global Aqua team for DSM with technical marketing and has commercial Global Key Account Responsibility in ANH Essential products. Buttle has a strong passion for sustainable development of aquaculture and is leading the business roll out of Sustell™ in the Aquaculture Industry. Figure 1. Proof of concept trial in Rainbow trout trial; fish fed from 50g to 300g (12 weeks). A dose response trial, where single cell protein was included from 0 to 20% of the formulation.
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