Now, electricity generator powered by pee
Four entrepreneurial teenagers from Nigeria have invented an electricity generator that is operated by urine.
Fourteen-year-olds Duro-Aina Adebola, Akindele Abiola, Faleke Oluwatoyin, and 15-year-old Bello Eniola showed their creation at the Maker Faire Africa entrepreneurs event, in Lagos, southern Nigeria on 5 and 6 November, the Daily Mail reported.
According to the Maker Faire blog, urine is put into an electrolytic cell, which breaks the urea into nitrogen, water, and hydrogen.
The hydrogen then goes into a water filter for purification, which then is pushed inside a gas cylinder.
The gas cylinder pushes hydrogen into a cylinder of liquid borax, which removes the moisture from the hydrogen gas.
This purified hydrogen gas is then pushed inside the generator. The generator provides six hours of electricity from a litre of urine.
The Maker Faire blog has described the generator as "possibly one of the more unexpected products" at the event.
While the generator does have one-way valves for safety, more robust measures may be needed before it can be sold widely.