ABSTRACT
The possibility of the reuse of the treated stream either as process water itself or, in the case of partial deionization, as chemical make-up, should always be a part of the thinking in the design of a laboratory feasibility study of an ion-exchange system. It is important that the analysis of the influent for a laboratory study of an ion-exchange process includes the measurement of total dissolved solids as well as the measurement of a sufficient number of individual components to account for these dissolved solids and establish a reliable anion-cation balance. Two modes of conducting initial resin screening tests are open to the investigator: batch equilibrium studies and column tests. For ultimate design purposes, there is no question that column runs are an essential part of the laboratory study. Modular columns intended for chromatographic work are also very convenient for laboratory-scale ion-exchange work.
