ISEP Continuous Ion Exchange System


Ion exchange, often abbreviated IX, is an effective technology for removing dissolved ionic compounds
from liquid solutions, primarily drinking water sources. IX is most commonly known for removing nitrate but is also
effective at removing contaminants such as perchlorate, arsenic, Chrome-6, and more recently, PFAS (Per- and
Polyfluorinated Substances).

Calgon Carbon has been a global leader in ion exchange treatment technology for over 30 years, thanks in large part to the success and advanced performance of its proprietary Ion Exchange Separator (ISEP®) system. With over 650 installations in more than 40 applications, Calgon Carbon’s ISEP® continuous ion exchange system continues to be an economical solution to complex drinking water challenges. The ability of the ISEP system to continuously regenerate the ion exchange resin in situ is what makes the ISEP unique.

HOW IT WORKS: The ISEP system consists of multiple ion exchange columns, filled with resin, which are either mounted on a rotating turntable or a stationary platform. Each of these columns are concentrically positioned and attached to a rotating multi-port valve situated at the heart of the column configuration. The counter-current and counter flow of the ISEP® system allows for a portion of the columns to be in use for treatment while other columns are being regenerated in place. The result is a substantial reduction in resin utilization, water waste, and chemicals needed for regeneration. Ultimately, it provides higher recoveries of clean drinking water compared to conventional fixed-bed ion exchange systems. For example, conventional ion exchange systems can produce 40,000 gallons of brine per day versus Calgon Carbon’s comparable ISEP® system, which produces just 4,000 gallons per day. This dramatically reduces disposal costs, while also conserving precious water supplies.