Sketch Model Review Small scale agriculture

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Sketch Model ReviewSmall scale agriculture

• Manioc Grater

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What is Manioc?

• a.k.a. Cassava, Yucca Root
• Widely grown consumed in Africa, Asia, Latin
  America, the Caribbean
  
• 3rd most important source of calories in the
  tropics high in protein, vitamins A B
  
• Vital source of food security income generation

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Customer Information

• Developing countries Haiti, Nigeria, Tanzania,
  Ghana, Mozambique, Uganda, Democratic Republic of
  Congo.
  
• Grown by poor farmers, many of them women
• Currently use time-consuming and laborious
  process
  
• Uses
• -Replace wheat flour
• -Animal feed
• -Binder in charcoal

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Market Data

• Manioc market historically neglected
• Global Cassava Development Strategy
• 1. Increase sustained production in growing
  markets
  
• 2. Guarantee uniformly made product
• 3. Provide international consumer market with
  competitive prices
  
• To do the above, must first
• -Shred manioc faster
• (1 manioc / min, vs.1 in 45 min now)
• -Develop way to preserve it

Source Food and Agriculture Organization of the
UN
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Attempted Alternatives

• Rotary Grater
• Williams-Sonoma
• could not grab material
• Came out a sticky pulp
• Clogged the grater
• Food Mill
• Crate and Barrel
• Difficult to fit Manioc
• Fell apart not flexible
• Did not remove material.

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Shredding Theory

• Smaller teeth mean fewer jams, smaller pieces,
  less force required.
  
• Without holes, less likely for the manioc to clog
  the system.
  
• Rotating shredders allow continuous force.
• Low-speed shredders have been demonstrated as
  effective on a large range of materials.

http//www.ssiworld.com/things/things9-en.htm
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The Shredder
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Manioc Grater Analysis

• Keep pursuing the idea
• Increase blade number and decrease spacing
• Ultimately, shred into much smaller pieces
• Attach to bicycle, to achieve pedal power
• Goal 1 manioc/min
• Investigate production methods using cheaper
  components