In case you missed this story when it first broke in 2012, we look back at the tale of four Nigerian teenagers who invented a pee-powered generator that produces enough electricity to last six whole hours.
Four teenage girls 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.
The girls have come up with a practical way to put the idea into action, though. Their method for using urine to power a generator is one the average household can appreciate.
Still, technology needs to evolve further before such a system is feasible, at least as far as applications like powering generators go. It would be of great aid to places like Lagos where power outages are quite frequent.
Image and additional reporting from forbes.com