AWWA ACE59874

AWWA ACE59874 Innovative Treatment Alternatives to Minimize Residuals Containing Nitrate, Perchlorate, and Arsenic
Conference Proceeding by American Water Works Association, 06/17/2004

Min, Joon H.; Boulos, Lina; Brown, Jess C.; Cushing, Robert S.; Gouellec, Yann Le; Cornwell, David A.; Coppola, Edward N.; Hering, Janet G.

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Full Description

As utilities are implementing perchlorate, nitrate, and arsenic treatment technologies tomeet increasingly stringent regulations, using/finding effective means for residual managementis becoming more important. The goals of this project were: to develop and evaluate alternativesto minimize production of residuals and wastes generated during treatment of drinking waterscontaining arsenic, perchlorate, or nitrate; and, to treat residuals that are generated from thedrinking water treatment processes. As more stringent state and federal drinking waterregulations are adopted to limit these contaminants in drinking water, critical evaluation of notonly the primary treatment methods but also the brine management and disposal issues need tobe carefully addressed to implement new treatment systems. Specifically, the objectives of thisstudy were to:identify different types of residuals generated from perchlorate, nitrate, and arsenic treatmentprocesses;identify approaches required to meet overall perchlorate, nitrate, and arsenic treatment goalsin drinking water and residuals;develop and evaluate processes to minimize, manage, and treat concentrate waste streams;review pertinent regulations and compare costs and implementation issues associated withvarious treatment and disposal scenarios; and,summarize the results of this work in a format that will serve as a guidance tool for helpingutilities develop effective residual minimization and handling strategies. This project providestreatment alternatives for residuals from nitrate, perchlorate, and arsenic treatment processes.Some of the results presented here are based on the technologies that are already available while newand innovative methods and concepts have also been demonstrated during the project. Animportant aspect of this project was to collect and disseminate information on residual treatment,which is often overlooked in making a process selection. Includes reference, tables, figures.