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AWWA ACE91072
- Evaluation and Costs of Methods to Eliminate Ion Exchange Waste Brine Discharges From Nitrate Treatment Plants
- Conference Proceeding by American Water Works Association, 01/01/1991
- Publisher: AWWA
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This paper reports on a study of biological denitrification of waste brine from a nitrate removal plant. The objective was to develop a method of treating the waste brine to render it or portions of it reusable and reduce dependence on waste discharge to a local sewer. The study focused on efforts to reduce salt use and waste brine. It was anticipated that salt cost reductions as well as reductions in the use of the local sewer for discharge of waste salts may be achieved by this study. Biological denitrification and sulfate removal eliminated virtually all brine discharge and enabled recycling of the brine for further use. The author offers a brief discussion of biological denitrification and gives results of a number of tests using the process. Half of this paper is devoted to cost issues, including pilot plant, capital, and chemical costs.
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