Four teenage girls have figured out a way to use a liter of urine as fuel to get six hours of electricity from their generator. Fourteen-year-olds Duro-Aina Adebola, Akindele Abiola, and Faleke Oluwatoyin, and 15-year-old Bello Eniola displayed their invention this week at Maker Faire Africa in Lagos, Nigeria, an annual event meant to showcase ingenuity.
Here’s how the urine-powered generator works, as explained by the blog on the makerfaireafrica.com website:
• Urine is put into an electrolytic cell, which separates out the hydrogen.
• The hydrogen goes into a water filter for purification, and then into a gas cylinder, which looks similar to the kind used for outdoor barbecue grills.
• The gas cylinder pushes the filtered hydrogen into another cylinder that contains liquid borax, in order to remove moisture from the gas. Borax is a natural mineral, commonly used in laundry detergent.
• The hydrogen is pushed into a power generator in the final step of the process.
A big drawback is that hydrogen poses an explosion risk. But the girls used one-way valves throughout the device as a safety measure.
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