Lanxess has added reverse osmosis (RO) and ion exchange (IX) system dimensioning capabilities to its LewaPlus software suite. The module provides system modeling with Desalitech’s Closed Circuit Reverse Osmosis (CCRO) technology and enables the dimensioning of RO systems, helping system designers bring their water treatment footprint closer to zero liquid discharge (ZLD) or minimum liquid discharge (MLD) goals. Reverse osmosis is used for the desalination and purification of water and is widely used, especially in areas of water stress such as the American West. The traditional reverse osmosis process is sometimes limited to recovery levels of 75 to 85%, wherein 15 to 25% of the feedwater is not purified and becomes waste. In contrast, the CCRO process now available for modeling in LewaPlus offers recovery rates of up to 98%. This recovery is achieved by incorporation of a recirculation pump that returns the brine to the membrane feed and provides a high crossflow velocity through the membrane array.