Optimizing BAC Performance for Chemical Peaking in Potable Reuse

This project aims to optimize biologically activated carbon (BAC) performance for managing chemical peaking events in potable reuse systems. With new California DPR regulations requiring 1-log removal of compounds like acetone and formaldehyde, utilities face challenges in ensuring consistent performance under variable conditions. The study will evaluate how operational factors—such as ozone dose, EBCT, ammonia concentration, and temperature—impact BAC’s ability to remove low molecular weight organic contaminants. Testing will occur at three advanced treatment facilities across the U.S., with both ambient monitoring and controlled chemical challenge tests. The results will inform operating guidelines to improve the resilience and reliability of ozone/BAC systems in direct potable reuse applications.