AWWA WQTC69405

AWWA WQTC69405 Blended RO and Biological Filtration: A Novel Treatment Combination for Ammonia Removal and Copper Corrosion Control
Conference Proceeding by American Water Works Association, 11/01/2008

Quail, Steven J.

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This powerpoint presentation begins by providing a brief overview of the city of Hutchinson, Minnesota, and the water treatment plant (WTP) site location. Key issues included the following:exceeding copper corrosion standards as defined in theLead chlorine demands were significantly different between thetwo treatment trains using the same water supply;high iron concentration;biological growth occurring within distribution systems;disinfection byproduct (DBP) formation; and,aging facilities. Key issues were resolved with the following results:copper corrosion standards achieved;2007 CCR: 0.62 mg/L;uncontrollable chlorine demands;previously chlorine application varied with water production, now chlorine application H chlorine residual desired, ammonia reduced to 0.02 mg/L, andchlorine feed controllable; and,high iron concentration, Raw Water Iron concentration of 2.6 mg/L,existing plan generally controlled Iron below 0.30 mg/L, andfinished water Iron = 0.01 mg/L. Includes tables, figures.