Bruce Logan, Penn State (IMAGE) Penn State Caption Bruce Logan, Kappe Professor of Environmental Engineering, Penn State, holds three chambered microbial desalination cells. Credit David Jones, Penn State Usage Restrictions Non commercial use only 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.