More from "Extrusion elevation": One of the critical processing steps in the production of extruded, dry petfood is cooling. The cooling step is required after the drying and liquid-coating processes to remove excess heat. If enough heat is not removed, condensation can occur in the product storage bins or in the product package. This article discusses the major change in dry petfood that has prompted a change in the method that petfood needs to be cooled; review horizontal and vertical cooler designs; typical processing conditions; and how much cooling is required.
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