Theory 4-3 Centrifugal Separation
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Transcript of Theory 4-3 Centrifugal Separation
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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
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4. Milk processingCollection and reception of milk Clarification Centrifugal separation Membrane filtration StandardisationHomogenizationPasteurizationSterilizationConcentration
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3. Centrifugal separation What is centrifugal separation ? PrincipleWhy needs centrifugal separation?ImportanceMethods of centrifugal separationApplication
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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
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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
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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
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Cont; Why needs centrifugal separation ?Needs separation for matching the dairy products composition
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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
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Separator disc stacksVertically aligned distribution holes
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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
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Cream & skim milk separation
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1 Skim milk outlet with pressure regulating valve2 Cream throttling valve3 Cream flow meter
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Large scale cream separator
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Milk processing unit with a separator
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Milk processing unit with de-areotor, separator & homogenizer
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Separators at dairy plants
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Small centrifugal separators Manual separatorElectrical separator