Young African schoolgirls create urine-powered generator
Found on Digital Journal on Sunday, 11 November 2012
The fourth annual Maker Faire debuted the 14-and-15 year-old girls' invention. The generator provides six hours of electricity with a liter of urine.
The electrolysis of urea that will generate the hydrogen requires an electrical input. Therefore, the urine cannot be used to create electricity in areas that do not have an existing power supply.
One liter for six hours? I may be a pessimist, but that just sounds too good to be real. Of course, another question is how much energy will be left since you need to use electricity to maintain the electrolysis.