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Problem C2 Theory
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Problem C2 Theory

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  • 1. Problem C2Batch Sedimentation
    Sibug, Anna Kristina L.
    Tan, Maria Kimberly L.
    Villanueva, Von Kirby
  • 2. Sedimentation
    - is the process wherein a dilute slurry is settled by gravity into a clear fluid and a slurry of higher solids concentration.
    - the partial separation of concentration of suspended solid particles from a liquid by gravity settling.
  • 3. Principles/Theories
    A
    B
    B
    A
    Zo
    C
    D
    Z∞
  • 4. Principles/Theories
    Figure 1. Behaviour of batch curve during batch sedimentation process
  • 5. Kynch Method
    graphical approach that is used to find the settling velocity of a slurry or suspension over time
    Restrictions
    neglecting wall effects
    assuming uniform particle size and shape
    the particle reaches zero at large times
    the system must obey Stokes’ Law
  • 6. Principles/Theories
    In the constant settling region,
    Free settling: settling velocity (ut) is constant
    In the transition region,
    Hindered settling region
    Factors affecting the rate of sedimentation
    Initial height of the suspension
    Initial concentration of the suspension
    Where:
    Ho= initial height of interface
    Hc= critical height
    tc= time in obtaining the critical height