AWWA WQTC65919

The purpose of this powerpoint presentation is to discuss implementation of dissolved air flotation (DAF) at the New York City Croton Filtration Plant, and to make recommendations to utilities regarding water quality considerations and design criteria for the use of DAF. The presentation begins by providing a brief overview of the Croton system, along with the primary treatment objectives that include: disinfection; particle removal; natural organic matter removal (for DBP control); and, iron and manganese control. Process selection is presented and includes: raw water quality; contaminants of concern; pilot studies; and, membranes. Design criteria, current status and recommendations are also covered. Includes tables, figures.