XtremeRO/NF—Advanced & High Recovery Brine Concentrator

Advanced reverse osmosis & nanofiltration systems for demanding industrial applications

Our next-generation reverse osmosis (RO) and nanofiltration (NF) systems provide industry leading recovery and reliability. Concentrate brine and reduce discharge volumes, recover freshwater, separate divalent and monovalent salts, and reduce the size and cost of downstream thermal brine management systems.
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Next-Generation RO & NF

Reverse Osmosis (RO) — the world’s dominant desalination technology — uses pressurized, semi-permeable membranes to remove dissolved salts from water. RO should be considered in all industrial wastewater and desalination applications where total dissolved solids (TDS) are less than 80,000 mg/L.


Nanofiltration (NF) uses a slightly more porous membrane and can separate divalent and monovalent dissolved ions. NF has specialty applications such as softening or concentrating sulfate-rich solutions while passing sodium chloride into the filtered permeate water.


Recent technological improvements allow RO and NF to achieve higher freshwater recoveries, reduce brine volumes, and treat more challenging waters such as those with scalants and organics. New ultra-high pressure RO (UHP-RO) membranes can reach brine concentrations of up to 130,000 mg/L total dissolved solids (TDS). When partnered with scale-removing technology, UHP-RO can reduce brine reject by up to 50% compared to previous RO.

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XtremeRO/NF systems have the latest industry advancements and Saltworks’ proprietary innovations to deliver high recovery and exceptional reliability in demanding industrial applications. These are not your typical commoditized skids — we incorporate intelligent automation and self-diagnostics that maintain membrane health, maximize up-time, and minimize operating costs. We also design them with the best RO or NF membranes for your particular project.


Available in three pressure classes:

  • XtremeRO/NF 600 operates at 600 psi (41 bar), concentrates brine to ~40,000 mg/L TDS
  • XtremeRO/NF 1200 operates at 1,200 psi (80 bar), concentrates to 80,000 mg/L TDS.
  • XtremeRO 1800 (UHP-RO) operates at 1,800 psi (120 bar), concentrates brine up to 130,000 mg/L TDS

Our Advantages

XtremeRO/NF systems are a total system solution — fully packaged, automated, scalable, and ready-to-operate. All systems are thoroughly factory-tested and delivered with comprehensive on-site commissioning, training, and support. We also offer tight integration with our full suite of advanced technologies that maximize recovery, minimize fouling risk, and enhance membrane longevity and overall reliability and uptime:

  • Scaling ion removal with BrineRefine, our automated precision chemical softening system
  • Tough XtremeUF ceramic ultrafiltration for organics and particulate removal
  • Dynamic recovery control with our industry-first ScaleSense sensors that provide real-time scaling ion measurements in challenging wastewater streams

Saltworks is experienced with complex chemistries and membrane fundamentals—we built the world’s first full-scale UHP-RO system. We provide custom process design and engineering, including post treatment options for specialized applications. Take advantage of our comprehensive pilot testing program including mobile units ready for rapid dispatch. We can also set you up with remote operation capability, remote support for your operators, and spares management. Contact us to get started on your project.

Saltworks Membrane Pilot
An XtremeRO on-site pilot that achieved 99% recovery on cooling tower blowdown

RO & NF Applications

RO & NF Related Resources

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