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PEE-CYCLINGA PROJECT BY CHRIS MONDON AND JONATHAN
VALENTINE
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PURPOSE
• This idea was based off a project by the Rich Earth Institute in Battleboro, Vermont
• dedicated to advancing and promoting the use of human waste as a resource
• Designed a similar project to see if human urine is an effective fertilizer for plants
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CONCEPT
• Nitrogen Cycle
• Animals receive nitrogen from plants
• Waste left from animal contains nitrogen
• Bacteria in the soil “fix” nitrogen in the soil to be used by the plants
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METHODS
• We consulted with Jack Kubicki, who had some knowledge in pee-cycling, and helped us design the experiment
• We collected 8 cups of human urine from our fellow fraternity brothers
• We let the urine boil for 20 minutes
• Diluted the urine with water to a 10:1 ratio until we obtained a PH level of 5-6
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METHODS
• We chose two patches of grass outside of our house
• The grass was measured before we added anything
• ~2.74 inches
• Randomly measured four different spots and took the average length
• Patch #1 we watered only
• Patch #2 we applied urine/fertilizer mix
• We did this twice a day, once in the morning and once in the evening for 10 days
• Re-measured at the end of the 10 days
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RESULTS
• After measuring the grass
• Patch #1: ~3.23 inches (grew ~.5 inches)
• Patch #2: ~3.65 inches (grew ~.9 inches)
• We found that Patch #2 was a taller at the end
• Also, we noticed that Patch #2 was slightly a darker green
• This experiment has much potential, however we had a difficult time being able to effectively run the experiment due to the unpredictable Ohio weather
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FINAL THOUGHTS
• Pee-cycling has potential to become a way to re-use our human waste
• We feel that a larger-scale experiment with more time would have shown more conclusive results than we achieved
• We could not find accurate information how much or how frequently to treat it, and wonder if that could of led to different results.