Avista™ Essential User Guide

Reverse Osmosis is a salt separation process that occurs when pressure is applied to ‘salty water’ at a semi-permeable membrane. The pressure drives pure water through the membrane (permeate) leaving a more concentrated salt solution behind (concentrate or reject). This separation process has been turned into a continuous process by using a crossflow membrane configuration. Feedwater passes across a series of membranes, producing permeate and more concentrated feedwater to the next membrane. A feed pump generates the required pressure and a valve on the reject stream maintains the pressure across the membrane array. The concentration process is continued to practical limits. Typically brackish water systems will be operated at 70-80% recovery and seawater systems at 35-50% recovery.

Avista technical and laboratory services support a thorough evaluation and diagnosis of site-specific challenges. This analysis provides a clear strategy to solve customer-issues and properly apply the right chemicals. Once Avista chemicals are applied, ongoing data normalization is used to validate chemical performance and set cleaning procedures. Following this the Avista approach, we drive operator confidence and help to achieve peak system performance.

Download our Essential User Guide to learn everything about RO/NF systems.