宠物食品热能挤压技术的突破.pdf

1、Breakthrough thermal energy extrusion technology for pet foodEDDSWENGER.COMKey Topics:3The cooking extruder and components;defining extrusion cooking energies for producing direct expanded pet foods;traditional extrusion process&technologies;evolution of processing pet foods;advanced cooking extrusi

2、on(thermal);advanced extrusion systems studies;enhanced extrusion systems meat capabilities;road map to low SME/thermal cook;conclusionHigh Meat Ultra Premium Dog Food 100-200%meat addedThe Cooking ExtruderA continuous pressure cooker apparatus,by which moistened,expansile,starchy,and/or proteinaceo

3、us materials are plasticized and cooked by a combination of moisture,pressure,temperature,and mechanical shear.Noticed Moistened.To cook starchy carbohydrates,we need:MoistureTimeTemperatureIndependent variables:Dry Recipe(formula)Feed rate)Water Injected into preconditioner Steam Injected into prec

4、onditioner Preconditioner Mixing Intensity Other additivesIndependent variables:Mixing Intensity Retention Time in preconditioner Temperature of the preconditioned formula Mixing Quality=absence of clumpsFeeding System&preconditioner1.Dry Formula2.Pre-conditioning 10 Minutes 9-11%Moisture 20-40 C Te

5、mperature450-600 g/l Density1.5-3 Minutes retention Time20-30%Product Moisture 80-95 C Product Temperature 80 C Temperature(CCP)An extrusion cooking apparatus known simply as the extruder,depends on TWO sources of energy for fully cooking Pet Foods:Specific Thermal Energy(STE)Specific Mechanical Ene

6、rgy(STE)Sources of Energy for Cooking Extruded Pet Foods Mechanical shear-expressed as SME(Specific Mechanical Energy),is the electrical energy used up by the main drive motor to rotate the extruder shaft.The shaft,rotates a stack of screws and locks within the barrel cavity,typically lined by spira