Astronaut poop, urine can be turned into food, study claims
Human waste could one day serve as a valuable resource for astronauts on deep-space missions, a US-based study has claimed. Penn State researchers showed that a bacterium having 52% protein and 36% fats could be grown in methane produced by human waste, to provide for nutrition in space. The team removed 49-59% of solids in 13 hours during their test.