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Theory 4-3 Centrifugal Separation

Date post: 14-Sep-2015
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dairy technology
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Module contents - theory 1. Introduction √ 2. Milk composition √ 3. Physiochemical features of milk √ 4. Milk processing 5. Dairy products manufacturing 6. Dairy microbiology 7. Dairy factory and the environment 8. Quality assurance of milk & milk products
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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


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