Flue Gas Desulfurization Wastewater Treatment

Treat flue gas desulfurization (FGD) wastewater at a lower cost with mEDR chloride removal.

Flex EDR Selective removes chlorides providing a simple, high recovery and robust solution without complex pre-treatment.


FGD wastewater is blown down because chlorides accumulate, reducing stack sulfur absorption and causing corrosion. Selectively remove chlorides and recycle a sulfate rich, chloride weak, treated water back to the FGD process. Recycling reduces waste.

Flex EDR Stack in Shipping Container

Solutions for:

  • Internal recycling or treatment for discharge to meet US and Chinese Environmental Protection Agency (EPA) discharge limits
  • Up to 90% recovery with a low-cost fouling resistant membrane system
  • Zero liquid discharge brine management options with a low energy thermal crystallizer

Benefit from:

  • Eliminate chemical soda ash softening, reduce costs
  • Recycle water rather than treat and discharge
  • Selectively remove chlorides to minimize your waste production
  • Employ robust organic and fouling tolerant Ionflux ion exchange membranes in place of sensitive RO membranes
  • Achieve lower costs and extreme recoveries
  • Simple, safe, modular
  • Reduce chemicals added and waste generated
  • Mobile pilot plants available

Our Technologies

  • Selectively extract chlorides, without expensive calcium removal via soda ash softening
  • Recycle the treated water, reducing waste and costs
  • Output brines are non-scaling for ease of downstream brine management
  • Modular, low temperature crystallization for true zero liquid discharge
  • Self cleaning and reliable
  • Produce manageable concentrated brine or solids

Xtreme Reverse Osmosis device Saltworks Technologies
  • Technology advancements in reverse osmosis are enabling its second generation application to challenging waters.
  • XtremeRO enables this second generation with: scale and organic management, new membrane products, and advanced process controls that can treat organic laden waters and concentrate brines up to 130,000 mg/L.

  • Precise, compact chemical softening: modular & cost optimized.
  • Integrated controls, no clarifier, no floc or coagulant.
  • XtremeRO (X-RO) concentrates brines to 130,000 mg/L, halving conventional RO brine volumes.

Project Summaries

Learn more about FGD treatment, electrodialysis background and its innovations. See how Saltworks’ SaltMaker can achieve true ZLD on brines. We have successfully treated some of the world’s most difficult wastewaters.

Looking for more in-depth knowledge about flue gas desulfurization treatment options? 

Read our blog on Improving FGD Economics Through Chloride Removal. 

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Our Expertise Applied to Your Water Treatment Needs.