Removal of Priority Pollutants in Wastewater by Secondary Treatment and Groundwater Recharge

by David M. Esposito, Pima County Wastewater Management, Dep, United States,
Philip E. Patterson, Pima County Wastewater Management, Dep, United States,
David G. Eaker, Pima County Wastewater Management, Dep, United States,
George A. Brinsko, Pima County Wastewater Management, Dep, United States,



Document Type: Proceeding Paper

Part of: Environmental Engineering

Abstract:

Monitoring influent and effluent wastewater for organic priority pollutants at two Tucson-area treatment facilities has shown significant removal rates for commonly detected pollutants. Effluent is discharged to a normally dry river channel where it recharges groundwater. River samples of discharged effluent indicate the presence of small amounts of two purgeable halocarbons near the plants. No organic contaminants were found in samples collected further downstream. Groundwater quality is monitored using 12 wells located downgradient of treatment plant discharge. Organic priority pollutants were not detected in the groundwater, except for chloroform in a single sample, which was collected immediately after well construction.

Subject Headings: Pollutants | Water treatment | Groundwater recharge | Effluents | Wells (water) | Water treatment plants | Water discharge

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