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CLOSED-LOOP TREATMENT OF ELECTROLYTIC AND ELECTROLESS NICKEL RINSE WATER BY POINT-OF-USE ION EXCHANGE: A CASE STUDY.
Citation:
Szlag*, D C., J. Leonhardt, A Foster*, P. T. Bolger**, AND M Goss*. CLOSED-LOOP TREATMENT OF ELECTROLYTIC AND ELECTROLESS NICKEL RINSE WATER BY POINT-OF-USE ION EXCHANGE: A CASE STUDY. Presented at ASEF/EPA Conference, Rosen Center, Orlando, FL, 01/29-02-02/2001.
Description:
Closed-Loop Treatment of Electrolytic and Electroless Nickel Rinse Water by Point-Of-Use Ion Exchange: A Case Study.
Dave Szlag1, Joe Leonhardt2, Albert Foster1, Mike Goss1 and Paul Bolger1.
1 U.S. EPA, National Risk Management Research Laboratory, 26 W. M. L. King Dr., Cincinnati, OH, 45268.
2 Leonhardt Plating Company, Estes Avenue, Cincinnati, OH.
Many recent pilot tests have demonstrated the benefits and cost effectiveness of point-of-use treatment technologies as opposed to centralized wastewater treatment for all sizes of plating facilities. A comprehensive 9-month case study at a small-sized plating facility in Cincinnati, Ohio, utilizing point-of-use ion exchange is described in this report. The principal constituents were tracked through the rinsing process for both electroless and electrolytic nickel lines. These results were used to develop simple mathematical tools that allow one to estimate the effectiveness of an existing rinsing station / ion exchange configuration and explore new options. We describe how these tools can be used to identify relationships between workload, rinsing station design, ion exchange system design, and temporal fluctuations in the mass loads handled by the point-of-use ion exchange system. This facility has recently switched from using an ion exchange service to a totally on-site system. The effectiveness, operational experience and costs associated with the each ion exchange approach are also presented.