Anerobic Digester (image) University of Florida Share Print E-Mail Caption Pratap Pullammanappallil, a UF associate professor of agricultural and biological engineering, poses with an anaerobic digester used in a process he developed at NASA's request to turn human waste into rocket fuel. Credit Photo by Amy Stuart, UF/IFAS Communications. Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.