宠物食品挤压蒸煮中的淀粉糊化：平衡质量和可持续性.pdf

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1、Balancing quality and sustainability Ed de Souza Starch gelatinization in extrusion cooking of pet foods:Topic Overview:Importance of starch gelatinization in pet food productionIts role in digestibility,texture,and palatabilityKey Objectives:Address challenges of over-shearing Explore solutions for

2、 sustainable and profitable extrusion cookingAgenda:Starch Gelatinization Definition:oHeat and water cause starch granules to break down and swell.Importance in Pet Food:oEnhances digestibilityoImproves texture and palatability(flavor)Quality Control Parameter:oStandard practice:achieving specific g

3、elatinization levels:lab testing&feeding trials.Extrusion,a Unique process!Extrusion,a Unique process!Thermal+Mechanical Energy:Specific Thermal Energy(STE)is essentially Steam CookingSpecific Mechanical Energy(SME)is fundamentally ElectricityVersatility:Complex formulations and high number of raw m

4、aterialsHigh Temperature+Short Time Process(HTST)Shelf-Stable and nutritious pet foods(12-24 months).5An Extrusion system key components:An Extrusion system key components:1.Dry Formula Feeding System2.Pre-conditioning SystemThermal Energy3.ExtrusionMechanical Energy4.Back Pressure Valve(BPV)Fine Sp

5、ecific Mechanical Energy Control 5.Cutting Formatting Feeding System Pre-conditioner Extruder Formatting&Cutting system Essential Process Tools6Advancements in Preconditioning Systems Design Mix Hydrate HeatHigh Intensity Preconditioner(HIP)A Key component to the Thermal Cook Extrusion7Effects of HI

6、P Radial Speeds on Mixing Efficiency1.Shaft Speed Directly impacts distributive mixing and uniformity.2.Differential Speeds Improve distribution and homogeneity(FIFO).3.Retention Time(Eureka!)Longer retention,combined with higher mixing intensity,enhances consistency.4.Hydration Greater mixing inten