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Root Grinder
Grass Root Grinder Sketch Models
10/05/05
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2: Grind/Cut
“coffee grind-ed” root
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2: Grind/Cut
food mill
cheese grater
food processor
herb mill
chopper
linear grater
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Background
~ 0.254m
Ø 1 – 2mm
• Requirements:– Step 1: Separate from
dirt– Step 2: Chop/grinded
into <1 cm length– Step 3: mix back in with
separated dirt
– 1 cm3 fertilizer per plant
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Design Challenges
Tumbler:
• Excess particles
• Tumbler Jams
• Integration
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Design Challenges
Grinder/Cutter:• Power
Coffee Grinder (motor)
Bike (human power)
Speed: ~1,000 rad/sec
~720 rad/sec
Power: 200 Watts (max)
100 Watts
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How It Fits Our Idea Area:
“Renewable or alternative energy and agriculture…”
Producing inoculum root as an alternative fertilizer reduces energy consumption
used to produce ammonia.
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Background
• Customers/Market:
Customer Market
Organic farmers $7.8 billion dollar industry in US (2000)
Small farmers 2.1 million small farms (2002 USDA Census)
Farms in developing countries
88,000 metric tons of fertilizer used
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Sources:
• World Bank Grouphttp://web.worldbank.org/WBSITE/EXTERNAL/NEWS/
0,,contentMDK:20432940~menuPK:34480~pagePK:64257043~piPK:437376~theSitePK:4607,00.html
• Economic Research Service (USDA)http://www.ers.usda.gov/Briefing/Organic/
• United States Census of Agriculturehttp://www.nass.usda.gov/census/
• World Resources Institutehttp://earthtrends.wri.org/searchable_db/index.cfm?
step=countries&ccID=10&theme=8&variable_id=196&action=select_years
• International Fertilizer Industry Associationhttp://www.fertilizer.org/ifa/statistics/indcators/ind_reserves.asp