Fig. 1. (IMAGE) Chinese Society for Environmental Sciences Caption A, Design and electrode materials of the four SMFCs tested in this study. b, Cathode assembly. c, Experimental set-up. Credit Environmental Science and Ecotechnology Usage Restrictions Credit must be given to the creator. License CC BY 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.