AWWA WQTC65777

In order to comply with the Stage 1 Disinfectants and Disinfection Byproducts (D/DBP)Rule and the Stage 2 D/DBP Rule, utilities have modified and/or changed their treatmentprocesses, typically based on historical water quality. However, when there has been asignificant degradation in source water quality, many plants have struggled to maintaincompliance.The objective of this study was to develop long-term planning tools (e.g., regressionmodels) to determine the potential impact of source water quality changes on whether existingtreatment facilities could continue to comply with current, as well as future anticipated DBPstandards. These studies also evaluated the maximum concentrations for combinations ofinfluent total organic carbon and bromide that the existing facilities could effectively handle, thebest timing for seasonal water quality exchange programs, and treatment costs under a worst-casescenario. The planning tools were developed based upon actual water quality and full-scaleoperational data from Metropolitan's water treatment plants. Reality checks were performedbased upon past experiences and actual plant data, which were not a part of the modeldevelopment. Includes 10 references, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2007

Number of Pages:

18

File Size:

1 file , 360 KB