Membrane technologies now offer an energy and cost-effective way to meet regulations requiring minimal liquid discharge (MLD) and zero liquid discharge (ZLD) for wastewater treatment. By employing energy recovery devices, those savings can be compounded while preserving system reliability and operability.

Along with the Ultra High-Pressure Series (U Series), our PX® Pressure Exchangers®, turbochargers, and pumps offer a full slate of energy recovery devices that cover a range of pressure levels and flow rates to accommodate any size plant, or multiple stages of a membrane-based wastewater treatment system.  These devices are able to capture lost energy and recycle it back into the system to increase energy efficiency and reduce operating costs and emissions.

energy recovery devices for each stage of reverse osmosis ZLD and MLD wastewater treatment

The Pressure Exchanger® is the market leader in energy saving devices for the seawater reverse osmosis (SWRO) desalination industry, with over 25,000 PX devices installed in over 100 countries over the last 30 years. Our customers in SWRO save approximately $3.9 billion in energy costs each year, and the PX can offer the same energy saving benefits for wastewater treatment facilities.

Operating at pressures of up to 120 bar (1740 psi), the U Series brings the benefits of the PX to ultra high-pressure reverse osmosis systems.

PX and U Series benefits

  • Up to 98%* of the wasted energy is recovered
  • Up to 60% energy savings from recovering wasted energy
  • Up to 60% reduction in high-pressure pump size

*PX has peak efficiency of up to 98%, U Series has peak efficiency of up to 93%

The PX and U Series have a simple design with just one moving part and no controls or electronics to boost reliability, making them easy to install and scale. They require no scheduled maintenance to maximize facility uptime and are effective under a wide range of operating conditions, providing efficiency and savings even as flow rate, pressure, or salinity levels change.

Combined with our Turbochargers, which provide energy recovery for low-pressure stages, and our UHP Pump, which is designed to work in conjunction with the U Series, our range of energy recovery products can provide benefits for any membrane-based wastewater treatment facility.

Energy Recovery Devices

U Series

Energy Recovery’s U Series energy recovery device for ultra high-pressure reverse osmosis (UHPRO) wastewater treatment dramatically reduces the energy needs, costs, and emissions associated with treating wastewater discharge with UHPRO.

PX Pressure Exchanger

Our flagship PX technology is the most efficient and reliable energy recovery solution for desalination on the market.


Substantial savings for lower pressure system.

Low Pressure Solutions

Designed for low pressure applications such as potable, non-potable, agricultural, and industrial reuse, Energy Recovery’s LP PX Pressure Exchanger and LPT Turbocharger offer substantial energy savings and ease of integration.

Low Pressure RO energy recovery devices for potable water reuse

UHP Pump

The UHP Circulation Pump can be paired with our U Series for an end-to-end energy recovery solution that maximizes efficiency and cost savings.

Industry Applications

Lithium and Lithium-ion Industries

While demand is only increasing for lithium and lithium-ion batteries, lithium mining and battery production can be extremely resource intensive. It requires vast amounts of energy, land, and time, and increasing regulations now mandate these operations also treat their wastewater.

Pool of saltwater on the ground with mounds of dirt and lithium extraction equipment in the background

Textile Industry

The textile industry is one of the largest consumers of water in the world, producing 4.6 billion tons of wastewater each year. That vast quantity of water – saturated with chemicals, dyes, and solids – presents a significant threat to local waterways and a major cost for textile manufacturers.