Osmotically Assisted Reverse Osmosis (OARO) extends the capabilities of conventional RO, enabling the concentration of high-salinity and difficult-to-treat streams that would otherwise require thermal treatment. By using osmotic pressure to assist the separation process, OARO reduces the hydraulic pressure required to recover water from concentrated brines, improving efficiency and expanding the operating range of membrane systems. Osmotically Assisted Reverse Osmosis is particularly effective for treating wastewater streams with high saline levels and minimal organics.

At FTS H2O, our ROAR™ family of membrane elements and RecovOAR™ integrated process harnesses the power of OARO technology to address the unique needs of various industries, offering innovative solutions that drive efficiency and quality in resource recovery processes.

FTS H2O’s first commercial OARO-based RecovOAR™ installation.

Why Use Osmotically Assisted Reverse Osmosis?

Extends RO

Concentrates brines beyond the limits of conventional RO.

Recovers Freshwater

Extracts high-purity water from waste streams that traditional RO cannot.

Supports ZLD Goals

Enables high-recovery and Zero Liquid Discharge (ZLD) strategies.

Concentrates Brine

Minimizes concentrate disposal and associated costs.

High-Saline Streams

Effectively handles concentrated, high-saline industrial waste streams.

Energy Efficient

Lowers operating pressure and reduces the need for thermal energy.

Expands Recovery

Enables innovation in brine treatment & critical minerals recovery.

OARO Integrated Solutions

FTS H2O, an Aquatech Company, offers advanced Osmotically Assisted Reverse Osmosis (OARO) solutions through its ROAR™family of membrane elements and the RecovOAR™ integrated process. Together, these technologies enable higher water recovery, greater brine concentration, and reduced reliance on energy-intensive thermal treatment systems.

ROAR™ membrane elements provide the core OARO separation technology, while RecovOAR™ integrates OARO into a complete process for industrial wastewater concentration, resource recovery, desalination, and ZLD applications.

Learn More About ROAR™
Learn More About RecovOAR™