RWEDI-Water

RWEDI-Water

The resin-wafer electrodeionization (RWEDI) technology developed at Argonne National Laboratory is an energy efficient, low cost, and robust water treatment technology that can be utilized to purify make-up water streams for cooling towers from both freshwater and alternative water sources. RWEDI-water is a separations technology that uses electricity to remove ions that cause scaling and corrosion from the cooling tower make-up water supply. RWEDI-water reduces operating costs of the cooling tower system by up to 30% through 30% lower make-up water requirements, 40% less chemical use, and reducing maintenance costs. RWEDI-water reduces make-up water use by allowing for increased cycles of concentration and reduces chemical usage by decreasing the total dissolved solids in the water.

The RWEDI-water system is built from commercially available components and Argonne’s patented modification to enhance system performance and flexibility. The technology is a cost-effective method, maintaining high performance of both productivity (recovery ratio) and energy efficiency which is of strategic importance to optimize process economics. Furthermore, RWEDI-water has superior advantages in equipment maintenance/service time and cost as well as process performance and consistence compared to other technology. The system has a modular design that allows for easy sizing of the system into existing cooling tower systems. The system can be installed ahead of the chemical treatment equipment allowing for chemical treatment to be used as an emergency back-up. Once installed, the RWEDI-water system requires no ongoing maintenance other than ~yearly replacement of the membrane packs.