Astronaut Pee Turned Into Fuel

astronaut_urine_recycling

Alyssa Denigelis reports: It’s a classic fact that astronaut urine can be processed into drinkable water. Now a new bioreactor could turn the waste filtered from that pee into an energy source as well.

When water supplies run low on a space mission, astronaut urine can be treated to become drinking water. But the waste removed is still, well, waste. University of Puerto Rico scientists Eduardo Nicolau and Carlos R. Cabrera, working in collaboration with the NASA Ames Research Center, came up with a new approach to make use of the waste.

First they used a process called forward osmosis to hydrolyze urea from urine. That urea was converted into ammonia using an enzymatic bioreactor. Then the ammonia was electrochemically oxidized to generate electrons and molecular nitrogen, Nicolau told DNews.

Although there have been previous attempts to develop urine bioreactors, they typically didn’t turn urine into a fuel cell for power. The idea with this new system is to both remove urea from wastewater and generate valuable components from human waste, Nicolau explained…(read more)

Discovery News

Photo: NASA astronaut Tom Marshburn updates software on the Waste and Hygiene Compartment’s Urine Processor Assembly in the International Space Station. Astronaut urine could be recycled into fuel. Credit: NASA, Flickr Creative Commons.


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