Food Processing Separation & filtration Techniques
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Questions and Answers

What is the primary goal of separation processes in the food processing industry?

  • To heat food components
  • To combine different food components
  • To mix residues with extracts
  • To remove specific components for higher product value (correct)
  • Which characteristic is NOT commonly used in separation processes?

  • Taste (correct)
  • Size
  • Density
  • Color
  • Which of the following methods is used to separate components based on particle size?

  • Extraction
  • Filtration (correct)
  • Centrifugation
  • Distillation
  • What type of separation is centrifugation primarily based on?

    <p>Differences in particle density</p> Signup and view all the answers

    Which separation process relies on the principle of solubility differences in different solvents?

    <p>Extraction</p> Signup and view all the answers

    What is a potential consequence of using a filter with excessively large pore sizes?

    <p>It may not effectively block smaller particles.</p> Signup and view all the answers

    How does the quantity of solids in a slurry influence filtration?

    <p>More solids can lead to a thicker filter cake.</p> Signup and view all the answers

    What effect does using a high volume of slurry have on the filtration process?

    <p>It leads to a larger filter cake that can obstruct the process.</p> Signup and view all the answers

    Why is the type of filter specified in the BPR critical?

    <p>It ensures the correct size of particles are stopped.</p> Signup and view all the answers

    What could be a result of a thick filter cake during the filtration process?

    <p>Blocking of the filter medium, slowing down the process.</p> Signup and view all the answers

    What is the term used for the solid material that remains on the filter during filtration?

    <p>Filter cake</p> Signup and view all the answers

    In which type of filtration equipment is centrifugal force used to separate solids from liquids?

    <p>Centrifugal filter</p> Signup and view all the answers

    What happens to the filtrate in a centrifugal filter when the solid material is the desired product?

    <p>It is discarded as waste material.</p> Signup and view all the answers

    What is the purpose of the initial filter material or membrane in a filter press?

    <p>To assist in building the filter cake</p> Signup and view all the answers

    At what pressure are filter plates typically forced together in a filter press?

    <p>100 pounds per square inch</p> Signup and view all the answers

    What is the liquid that passes through the filter during the filtration process called?

    <p>Filtrate</p> Signup and view all the answers

    What is the main advantage of using a filter press for filtration?

    <p>It produces a very pure filtrate.</p> Signup and view all the answers

    During the filtration process, the solids and liquid mixture is referred to as what?

    <p>Suspension</p> Signup and view all the answers

    What is a disadvantage of using a rotary drum vacuum filter?

    <p>The pressure difference is limited to 1 bar.</p> Signup and view all the answers

    In what application would a filter press be particularly useful?

    <p>In clarifying soft drinks and fruit juices.</p> Signup and view all the answers

    Which factor is NOT listed as a common parameter controlling filtering operations?

    <p>Temperature of the slurry</p> Signup and view all the answers

    What is one advantage of using a rotary drum vacuum filter?

    <p>The operating speed can control cake thickness.</p> Signup and view all the answers

    Which method can speed up the flow in filtration processes?

    <p>Increasing pressure on the slurry.</p> Signup and view all the answers

    What could happen if too high a pressure is applied during the filtration process?

    <p>The filter medium could be damaged or burst.</p> Signup and view all the answers

    How does vacuum filtration differ from pressure filtration?

    <p>It uses a vacuum to draw the slurry into the filter medium.</p> Signup and view all the answers

    Which product is commonly processed using plate and frame filters?

    <p>Fruit juice</p> Signup and view all the answers

    Which of the following is a necessary accessory for operating a rotary drum vacuum filter?

    <p>Vacuum pump</p> Signup and view all the answers

    What is a limitation of filters with a small pore size?

    <p>They reduce flow rate as more material is retained.</p> Signup and view all the answers

    What type of filter is used in the beer production process during maturation?

    <p>Rotary drum filter</p> Signup and view all the answers

    How does centrifugal force assist in filtration?

    <p>By forcing the slurry against the filter medium.</p> Signup and view all the answers

    What might occur if the vacuum in a rotary drum vacuum filter is too strong?

    <p>The filter medium could be damaged or burst.</p> Signup and view all the answers

    What happens to the filter cake when the slurry is drawn through vacuum too weakly?

    <p>It can become compacted and stop filtration.</p> Signup and view all the answers

    Study Notes

    Food Processing Separations

    • Separations are crucial in the food processing industry.
    • Goal: isolate specific components, boosting product value (extracted component, residue, or both).
    • Separation methods rely on differences between components (size, shape, color, density, solubility, electrical charge, volatility).

    Separation Techniques

    • Density-based separations:

      • Cream separator: separates based on density differences.
      • Clarification (Precipitation): removes components based on density.
    • Size-based separations:

      • Membrane processes: use membranes to separate by size.
      • Filtration: separates solids from liquids based on particle size differences. Typically separates precipitate from solution or particles from air.
      • Centrifugation: separates based on density differences in particles.
    • Solubility-based separations:

      • Extraction: separates compounds based on different solubilities in different solvents.
      • Crystallization: isolates components based on differing solubilities in a mixture.
    • Volatility-based separations:

      • Distillation: separates components based on differing boiling points (volatility).
    • Other separations:

      • Electrophoresis: a separation technique based on differences in electrical charge.

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    Description

    Explore various separation techniques used in the food processing industry through this quiz. Learn about density-based, size-based, and solubility-based methods, including filtration, centrifugation, and extraction. Test your knowledge on how these methods enhance product value.

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