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dairy technology
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Module contents - theoryIntroduction Milk composition Physiochemical features of milk Milk processingDairy products manufacturingDairy microbiologyDairy factory and the environmentQuality assurance of milk & milk products
4. Milk processingCollection and reception of milk Clarification Centrifugal separation Membrane filtration StandardisationHomogenizationPasteurizationSterilizationConcentration
3. Centrifugal separation What is centrifugal separation ? PrincipleWhy needs centrifugal separation?ImportanceMethods of centrifugal separationApplication
1. What is centrifugal separation ?Isolation of individual milk components Raw milk Milk componentRaw composition ?New composition ?Centrifugation
Stokes LawCentrifugal force is generated in a rotating vessel
2. Why needs centrifugal separation ?Variable composition in different dairy productsFluid milk productsPasteurized and Sterilized Concentrated milk productsCondensed & PowderedCultured dairy productsCurd, Cheese, Yoghurt, Beverages Creamy dairy productsButter, Ice cream, Whipped cream, Ghee or anhydrous milk fat
Cont; Why needs centrifugal separation ?Milk is the basic raw materialIt has variable constituents Water Butter fat or creamMilk sugar or lactoseProtein Whey & casein proteinsSolid non fatVitaminsMinerals
Cont; Why needs centrifugal separation ?Needs separation for matching the dairy products composition
3. Methods of centrifugal separationTwo types of separationCentrifugationFiltration membrane processing (Next lesion)CentrifugationSimilar to mechanical clarificationCentrifuge consists of Up to 120 discs stack Discs angle at a 45 to 60 degreeDiscs separated by 0.4 to 2.0 mm gap Discs has vertically aligned distribution holes
Separator disc stacksVertically aligned distribution holes
Cont; CentrifugationIntroduce milk into top panSet machine to 1500rpmSeparate similar dense particles Run until complete separationCollect cream and skim milk separatelyControl of the fat contentBy a throttling valve in the cream outlet
Cream & skim milk separation
1 Skim milk outlet with pressure regulating valve2 Cream throttling valve3 Cream flow meter
Large scale cream separator
Milk processing unit with a separator
Milk processing unit with de-areotor, separator & homogenizer
Separators at dairy plants
Small centrifugal separators Manual separatorElectrical separator