AWWA ACE70968

This powerpoint presentation begins by presenting a brief overview of Biological Treatment Process Fundamentals. Direct biological perchlorate destruction demonstration testing in Rialto, California, is presented and technical objectives included: evaluating efficacy of using fixed-bed (FXB) bioreactors and post-treatment to convert perchlorate-contaminated water into potable water; demonstrate sustained removal capabilities; identify process limitations and potential failure scenarios; and, develop accurate full-scale facility lay-outs and cost estimates. Pilot testing phases included: Phase I: Biological Acclimation; Phase II: Optimization; Phase III: Sustained Removal; and, Phase IV: Robustness Testing. EDR/BIOBROx perchlorate destruction pilot testing at the Magna Water District is presented, and had the following objectives: demonstrate efficacy BIOBROx approach; develop design criteria for blend ratio and EBCT; demonstrate sustained perchlorate removal; evaluate robustness of the process during system upsets (system shut-downs, WW feed failures, diurnal variations in WW); and, identify optimal biogrowth support medium. The experimental design included: Phase 1: Biological Acclimation; Phase 2: Percent Blend and EBCT Optimization; Phase 3: Sustained Removal; and, Phase 4: Robustness Characterization. Includes figures.