Small-scale desalination plants serve critical needs where centralized water infrastructure simply isn’t an option: aboard ships, at remote industrial sites, on islands, and in containerized systems built for mobility. But without thoughtful system design, producing water at small scale can cost significantly more than at large, optimized facilities. Energy costs are the dominant operating expense in RO desalination, and in decentralized environments powered by diesel generators or limited grid connections, those costs are even higher. Isobaric energy recovery devices (ERDs) address this challenge directly by capturing high-pressure energy from the brine stream and transferring it back into the system. ERDs can reduce overall energy consumption by up to 60%, lowering operating costs and making projects viable that otherwise wouldn’t be.
The PX® Pressure Exchanger® is well suited for the demands of small and decentralized desalination systems. Its direct pressure transfer approach delivers industry-leading efficiency, while its compact footprint, zero maintenance requirements, and simple operation makes it ideal for remote or mobile deployments where technical oversight is limited and downtime is costly. Across maritime, tourism, containerized, and industrial applications, the PX helps operators balance the flexibility of decentralized water production with the performance and reliability those environments require. For small-scale SWRO systems, energy efficiency is not only a design consideration, but it also determines feasibility, cost, and long-term performance.
