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Scientists turn human waste into rocket fuel

Indian-origin researchers have developed a process to turn human waste into biogas that could fuel rockets to ferry astronauts back to Earth. “The idea was to see whether we could make enough fuel t

  • Published: November 28, 2014 2:46 PM IST
space-rocket

Indian-origin researchers have developed a process to turn human waste into biogas that could fuel rockets to ferry astronauts back to Earth. “The idea was to see whether we could make enough fuel to launch rockets and not carry all the fuel and its weight from Earth for the return journey,” said Pratap Pullammanappallil, associate professor at University of Florida. Also Read - Google Doodle celebrates Scottish scientist Mary Somerville; details

“Methane can be used to fuel the rockets. Enough methane can be produced to come back from the moon,” Pullammanappallil added. Also Read - NASA, Microsoft to help scientists work virtually on Mars

The study led to the creation of an anaerobic digester process, which kills pathogens from human waste, and produces biogas — a mixture of methane and carbon dioxide by breaking down organic matter in waste. For the study, NASA supplied the scientists with a packaged form of chemically produced human waste that also included simulated food waste, towels, wash cloths, clothing and packaging materials.

Pullammanappallil and then-graduate student Abhishek Dhoble, now a doctoral student at the University of Illinois, ran laboratory tests to find out how much methane could be produced from the waste and how quickly.

“The process could produce 290 liters of methane per crew per day, all produced in a week,” he pointed out. In earth-bound applications, that fuel could be used for heating, electricity generation or transportation.

“It could be used on campus or around town, or anywhere, to convert waste into fuel,” he added.

The digestion process also would produce about 200 gallons of non-potable water annually from all the waste. The study was published in the journal Advances in Space Research.

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  • Published Date: November 28, 2014 2:46 PM IST



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