Product recovery

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Product recovery

  1. 1. SEMINAR ANKUSH MEENA B100974CH DEPATMENT OF CHEMICAL ENGINEERING NATIONAL INSTITUTE OF TECHNOLOGY CALICUT 12/03/2014
  2. 2.  The Product recovery operation are also known as downstream processing steps.  Product recovery in bioprocessing plays a vital role.
  3. 3.  Downstream- ‘After the fermentation process’.  Primary ‘unit operations’ of Downstream Processing  Cell recovery /removal  Dewatering
  4. 4.  Secondary ‘unit operations’  Protein purification  Adsorption chromatography  Protein processing  Immobilisation  Prilling  Protein packaging  Sterilisation etc
  5. 5. The cell disruption techniques may be classified as • Physical method • Chemical method
  6. 6. The following unit operations are used for the separation of solids : • Filtration • Sedimentation • Centrifugation • Foam Separation • Precipitation
  7. 7. System Type With phase change Without phase change Solid-liquid Soluble Drying, Evaporation, Adsorption Ultrafiltration, Reverse osmosis Insoluble Drying Filtration, Sedimentation , Liquid-liquid Soluble Distillation Chromatography Insoluble Extraction Centrifugation Solid-solid immiscible Selective Solubilisation Air Separation Screening sievingMiscible Cell disruption Liquid-liquid-solid Miscible Immiscible Adsorption Centrifugation Sedimentation Decanting
  8. 8.  It is based on the differences in the surface activity.  It is chemical process of removing a component of a liquid mixture using a bubbled gas and a surfactant to collect the material.  Wastewater treatment systems often use foam separation steps to remove solids from the water stream.
  9. 9.  It is also a very useful method for product recovery by adding the precipitation agent .  The compounds from the corresponding salts or the suspending solids which would settle down to the bottom.  This method is extensively used for product recovery of protein isolates or protein concentrates from oil seeds
  10. 10.  Filtration is a physical or mechanical process to separate solids particle from fluids.  Filtration is a technique used for two main purposes.  The first is to remove solid impurities from a liquid.  The second is to collect a desired solid from the solution.  It is a very effective and convenient method of separating the suspending solids from the slurries .  The fluid that pass through is called a filtrate.
  11. 11.  Filtration is used to separate particles and fluid in a suspension, where the fluid can be a liquid, a gas or a supercritical fluid.  Filtration, as a physical operation is very important in chemistry for the separation of materials of different chemical composition.  Filtration is also important and widely used as one of the unit operations of chemical engineering.
  12. 12.  pressure drop Viscosity of filtrate Area of filtering surface Resistance of filtrate cake Resistance of filtrate surface Properties of slurry
  13. 13. Filters are divided into three main categories 1. Cake filters 2. Clarifying filters 3. Cross-flow filters
  14. 14.  Slurries with high solid concentration are operated in cake filters.  Very dilute liquids are passed through the clarifying filters.  The cross-flow filters are used for concentrating the solutions by using filtration technique.
  15. 15. Thank you

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