XtremeRO/NF—Brine Concentrator & Water Maker

Advanced Reverse Osmosis & Nanofiltration Systems

Our next generation reverse osmosis (RO) and nanofiltration (NF) systems achieve extreme freshwater recoveries, minimizing brine waste and costs. Use them to make water, concentrate brine, selectively separate ionic solutions, and reduce the size and cost of downstream brine management systems. 

reverse osmosis RO


freshwater recovery



reduce trucking brine volume



Reduce water treatment costs


Reverse Osmosis & Nanofiltration 2.0

Reverse Osmosis (RO) is the world’s dominant desalination technology. It uses pressurized, semi-permeable membranes to separate freshwater from salty water. RO should be considered in all projects where total dissolved solids (TDS) are less than 80,000 mg/L. 


Nanofiltration is RO’s cousin, which uses a slightly more porous membrane. NF has some speciality applications such as concentrating sulfate-rich solutions, while allowing some sodium chloride to pass into the filtered permeable water. 


Recent technological improvements are enabling the application of RO and NF to achieving higher concentrations, and functioning with ever more challenging waters, e.g. those laden with scalants, and waters high in organics. We have solutions that enable RO and NF on these complex waters. 


Thanks to the advent of ultra-high pressure RO (UHP RO), brine concentrations of up to 130,000 mg/L total dissolved solids (TDS) can now be reached. When partnered with scale-removing technology, waste brine volumes from UHP RO are reduced by almost 50% over prior RO technology


Saltworks pilot plants can demonstrate our performance at your site or ours.

reverse osmosis system
reverse osmosis


Our XtremeRO/NF brine concentrator products are suitable for a wide range of wastewaters and designed to run at high recoveries—resulting in less brine waste.


Our plants are fully packaged systems, with intelligent automation that maintains membrane health, maximizes up-time, and minimizes operating costs. We can design and package them with the best RO or NF membranes for your project.


Our XtremeRO/NF products come in three pressure classes:  

  • XtremeRO/NF 600 operates at 600 psi (41 bar), enabling initial water recovery and producing brines of ~40,000 mg/L TDS.
  • XtremeRO/NF 1200 operates at 1,200 psi (80 bar), capable of concentrating to 80,000 mg/L TDS.
  • XtremeRO 1800 (UHP RO) operates at 1,800 psi (120 bar), pushing brine concentrations up to 130,000 mg/L TDS.

Comprehensive RO/NF Systems

To get the best performance, cost-effectiveness, and longevity out of an RO/NF process, scaling and fouling risks may need to be carefully managed. We can deliver our RO/NF systems as a total system solution, fully skidded, integrated, automated, scalable, and ready-to-operate, complete with:

  • Scaling ion removal using BrineRefine, our automated chemical softening system
  • Organics and particulate removal using our tough XtremeUF ceramic ultrafiltration technology
  • Dynamic recovery control using our novel sensors to measure recovery limits and adjust in real time as water conditions change.
  • Remote operation capability for hands-off operation as well as remote support from our service team. Interested in on-site operations support? We can offer that too.

Our plants are factory-tested and delivered with comprehensive on-site commissioning, training, and support.

brinerefine reverse osmosis

RO & NF Applications

  • Agriculture
  • Automotive
  • Brine Management
  • Cooling Tower Blowdown
  • Chemical Extraction (NF)
  • Factory Wastewater
  • Flue Gas Desulfurization
  • Food & Beverage
  • Landfills
  • Lithium Extraction & Refining
  • Microelectronics
  • Minimal & Zero Liquid Discharge
  • Mining & Metals
  • Municipal & Wastewater Reuse
  • Oil & Gas
  • Petrochemical & Refining
  • PFAS
  • Pharmaceutical
  • Power Generation
  • Process Optimization
  • Pulp & Paper
  • Remediation
  • RO Recovery Boosting

RO & NF Related Resources

A bank of Reverse Osmosis filters at a public water utility plant.

RO Brine Treatment: Why Maximizing Reverse Osmosis Recovery Matters

Treating RO brine should be approached from two directions. First, maximize the recovery of lower cost membrane systems to minimize the volume for later steps. Second, weigh brine disposal options against thermal treatment technology to determine whether you need to concentrate your brine or treat it down to solids.

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High Pressure Recirculation Pump to Minimize Energy and Increase Membrane Cross Flow

Applying Ultra-High Pressure Reverse Osmosis in Brine Management

New ultra-high pressure reverse osmosis technology for minimal liquid discharge (MLD) can reduce brine management costs by three times relative to evaporators. Modernized chemical softening technology is available to prevent scaling and enable recovery up to the osmotic pressure limit at 1,200 or 1,740 psi.

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Trash being dumped into a landfill

Ultra High Pressure Reverse Osmosis for Landfill Leachate

Reverse osmosis (RO) is the best available technology to treat landfill leachate for surface discharge. Possible trace volatile organic compounds (VOCs) and ammonia emerging in the RO permeate can be removed with a polishing step to meet the highest discharge standards.

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