The application of liquids, and fats and oils in particular, is a challenge in animal feed manufacturing. In aquatic feeds, the main liquid feed coating is fish oil. The traditional methods of fish oil application have involved drum coaters, paddle mixers, and mist-coating units. The major limitation of these types of coaters is the amount of total fat they can apply, which is a problem with feeds for aquatic species that require high-density diets with oil coatings that exceed 15%.
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