Nature's Helpers Clean Up TCE (IMAGE) Arizona State University Caption Bruce Rittmann's Biodesign Institute research team has utilized a system, called the microbial biofilm reactor, that uses a naturally occurring group of microorganisms to remove TCE from water. Here, ASU assistant professor Rosa Krajmalnik-Brown and graduate research assistant Michal Ziv-El assemble a membrane biofilm reactor to test against TCE. Credit Barb Backes, Biodesign Institute at Arizona State University Usage Restrictions None License Licensed content 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.