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Chocolate processing

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Bulk cocoa. Procedure. Measure weight of oreo cookies in sequence. Melt chocolate in microwave ... Smullen, 'Chocolate and Cocoa,' in Encyclopedia of Chemical ... – PowerPoint PPT presentation

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Title: Chocolate processing


1
Chocolate processing
  • Freshman Clinic I
  • Chemical Engineering

2
Pre-processing steps
  • Grown on cacao trees
  • Harvested throughout year
  • Fermented
  • Roasted

3
Why chocolate?
  • 24 billion in sales in 2001
  • All types of engineers needed in chocolate
    manufacturing
  • Fluid flow properties
  • Packaging
  • Equipment design
  • Process design
  • Quality control
  • Environmental standards

4
Objectives of module
  • Introduce food processing and GMP protocols
  • Perform simple statistical analysis

5
Chocolate processing
Cocoa beans
Liquor press
winnower
roaster
Cocoa cake
cleaner
mill
Cocoa butter
weigh
cooler
shells
Cake crusher
Cocoa butter storage tank
Liquor storage tank
Lecithin storage tank
Milk powder
Pulverizer
Grinder
Sugar
Dust collection system
Mixer
Sugar
Flavor Lecithin Cocoa butter
Corn syrup
Other ingred
conche
Refiner
Cocoa can filling system
Mixer
Bulk cocoa
Milk choc storage tank
To chocolate syrup system
Flow diagram
Milk chocolate
Cocoa powder syrup
6
Procedure
  • Measure weight of oreo cookies in sequence
  • Melt chocolate in microwave
  • Coat cookies, cool 20 min
  • Measure weight of coated cookies
  • Share data between groups
  • Eat!

7
Calculations
  • Individual groups calculate average weight,
    standard deviation
  • From shared data, calculate average weight, etc.
  • Recalculate nutritional label for coated cookies

8
References
  • B. L. Zoumas and J. F. Smullen, "Chocolate and
    Cocoa," in Encyclopedia of Chemical Technology,
    vol. 6, K. Othmer, Ed., 3rd ed. NY John Wiley
    Sons, 1979, pp. 177-199.
  • Whats that Stuff? Chemical Engineering News
    on-line, Dec 4, 2000
  • D. Manley, Technology of Biscuits, Crackers, and
    Cookies, 3rd ed., CRC/Woodhead Pub.
  • F. Willis and J. McDowell, Candys a Dandy
    Process Industry, Todays Chemist at Work, Dec
    2001, ACS.
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