ARTICLE 22 Alternative Proteins Magazine October 2024 "Throughout the world, animal protein producers are seeking alternatives to support their efforts towards a more sustainable feed-to-food chain. For animal feed production, by-products can provide a cost-effective and reliable source of valuable nutrients. However, high moisture content makes these materials sensitive to decomposition and nutrient spoilage by microbes. Treating by-products with Selko Yeast Inhibition solutions for protein extraction is an innovative approach that supports a more circular economy..." By-products from the food and beverage industry are increasingly popular and inexpensive sources of protein, sugars, and fibre compared to the conventional raw materials used in animal feed. Conventional ingredients can fluctuate in price and availability due to weather conditions affecting crop quality and yield. As global demand for animal feed continues to grow, reliance on crops like soybeans, corn and other conventional feed sources leads to environmental challenges, including deforestation, and water and land depletion. Throughout the world, animal protein producers are seeking alternatives to support their efforts towards a more sustainable feed-to-food chain. For animal feed production, by-products can provide a cost-effective and reliable source of valuable nutrients. However, high moisture content makes these materials sensitive to decomposition and nutrient spoilage by microbes. Within hours of production, by-products can significantly deteriorate. To protect that nutritional content, they require a combination of effective on-site treatments that inhibit microbial proliferation, such as drying, ensiling or fermentation. Though effective, these treatments can add expense and increase energy consumption and processing. Since these by-products can be considered waste streams by food and beverage producers the objective is to remove these materials at a low cost. Offering a solution that is more cost-effective and easier to apply – while significantly increasing the shelf-life and maintaining dry matter and nutritional value – provides a key to overcome these challenges. Both brewers’ spent grain (BSG) and dried distillers’ grains with solubles (DDGS) – which provide a protein concentration of 16%–22% – are commonly used for animal feed. But they also contain high levels of moisture, which allows for the fast proliferation of mould and yeast when the feed ingredients have not been properly managed or stored. Specific organic acid blends, including Revalet, Selko-SVG, Selko-BE+, and Selko-RSD decreases the pH of ALTERNATIVE SOURCE OF PROTEINS FOR ANIMAL FEED: A byproducts preservation and circular economy approach Andrea Lopez Global Product Manager Selko
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