CELF Process Diagram (IMAGE) University of California - Riverside Caption This is a diagram of a proposed biomass conversion process that integrates CELF pretreatment with Simultaneous Saccharification Fermentation to produce ethanol. Credit UC Riverside 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.