RDI™ Desalination System


The RDI™ Cell

With Atlantis’s patented radial deionization technology, RDI™, each pair of super capacitors forms a “cell”. Up to 100 cells are layered together to form the RDI™ cylinder. The wastewater stream flows through the dielectric spacers within the cylinder with a minimal pressure drop.

RDI™ Cylinder

A single RDI™ cylinder is designed to remove all or most of the salt. Because of minimal pressure drop, multiple cylinders can be operated in series and at high flow rates, enabling processing of high total dissolved solids (TDS) streams without the need for intermediate storage. Each device removes a portion of ions from the stream until the target dissolved solids level is reached. This design aspect of the RDI™ Desalination System is critical to its superior performance and a key difference between RDI™ and other versions of capacitive deionization.
The processing capacity of a large-scale cylinder is up to 5 gpm depending on salinity of water.

RDI™ Module

A module consists of one or more RDI™ cylinders, associated valving, DC power supplies, and controls. A system will typically contain one or more modules depending on purification level and flow rate required. A typical module layout is shown below. The 4 ft by 14 ft skid contains 20 cylinders and is designed to fit in a semi or flatbed. A module can process up to 100 gpm depending on the incoming salinity level.

Cycle Time

The cycle time of the device ranges between 2 – 20 minutes for cleaning and 2 – 20 minutes for purging. Many applications require the use of more than one cylinder to allow constant flow to be maintained.
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