Food Processing L2

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  1. what is mass balance?
    the principle that matter cannot be created or destroyed
  2. what are the applications of mass balance?
    mixing, blending, concentration, syrups, drying, dilution, separation, baking
  3. how to make a mass balance?
    • 1) define the system (draw schematic)
    • 2) designate letters/symbols to represent known and unknown variables and their list quantities
    • 3) choose basis for calculation (in different processing systems, different things remain unchanged ("tie" substances)
    • 4) total mass balance (TMB), an equation used on the total mass of each material entering or leaving the master system represents a total mass balance
  4. what is the Pearson square rule?
    • provides simplified solutions for mixing or blending of products
    • adaptation of the algebraic method, easier and quicker, especially for syrups
    • 1) quantity of A = absolute (% desired in blend - percent in B)
    • 2) quantity of B = absolute (% in A - % desired)
    • 3) quantity of blend C = quantity of A + quantity of B
  5. What is squash (the product)?
    • widely popular in many tropical countries
    • bottled beverage containing 15% or more fruit pulp
    • generally sugar syrup is added to about 40% and sufficient acid and essence is added so it can be diluted 1:3 (or more is supplemented with sugar) before consumption
    • hot filled into bottle and preserved using either sodium benzoate or potassium meta bi-sulfite
  6. what is energy balance?
    • similar to mass balance but need additional info on thermal properties
    • energy input = energy output + energy accumulated + energy lost
  7. what is energy balance used for?
    • calculate needs of the food plant and boiler size
    • heating needs of a building and cold storage requirements
  8. what is culinary steam?
    clean, good quality steam used for direct injection of steam, however it does dilute the substance
  9. what can be used in place of culinary steam?
    • an indirect heat exchanger such as plate and frame (for low viscosity liquids), tubular (medium viscosity liquids) or scraped surface heat exchanger (for high viscosity liquids) or a steam jacketed kettle will have to be used
    • indirect heat exchangers will not dilute the juice
Card Set:
Food Processing L2
2013-02-23 22:59:47
Food Processing L2

Food Processing L2
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