Optimized Water Solutions: Avoid ZLD

Targeting specific ions for removal can be the most cost-efficient way to treat a wastewater flow. Saltworks has treatment and sensing solutions available to treat ions and other species, making water suitable for discharge or re-use.

Selective Removal Target



Reduce water treatment costs



real-time sensor analyzers



Process Optimization



Selective Removal of Ions

Is your wastewater challenge limited to one or two constituents of concern? It may be possible to target and remove specific contaminants, avoiding the need for more complex and expensive treatment. 


Many wastewaters are more than 99% fit for discharge or re-use, but one or two contaminants prevent this. Saltworks’ IonSelect solutions target specific ions or contaminants of concern, removing them as a solid so you can discharge 99% of your wastewater volume and avoid brine management costs.


We pull from a variety of treatment methods, robust real-time sensors, and the expertise to know when and how to use them. 

Selective ion removal for brine management
Filter Press Producing Solids selective removal
Solids removed by selective precipitation and filter press.

IonSelect Examples

Method Examples
Selective precipitation and filtration
  • Remove heavy metals such as arsenic, cobalt, mercury, iron, manganese, aluminum, and others.
  • Reduce barium, sulfate, or calcium concentration in waters.
  • Produce solid filter cake, without a brine by-product.
  • Direct chemical or electrochemical destruction
  • Treat for cyanide and ammonia. Produce safe by-products such as nitrogen gas.
  • Monovalent electrodialysis removal
  • Remove monovalent ions such as chloride, to enable the water to be recycled and re-used.
  • Nanofiltration
  • Reject and concentrate sulfates, multivalent ions, and organics while passing monovalent ions such as sodium and chloride.
  • Challenge Us

    Don’t see your problem listed? Saltworks develops custom treatment solutions, designed for cost-effectiveness. Contact us and our process and chemistry experts will rapidly review your problem.

    targeted precipitation filter press solids
    Filter press cake: precipitated solids targeted for removal.

    IonSelect Applications

    • Agriculture
    • Automotive
    • Brine Management
    • Chemical Extraction
    • Chemical Softening
    • Cooling Tower Blowdown
    • Cooling Tower Cycle Boosting
    • Electrochemical Separations
    • Electrochemical Softening
    • Factory Wastewater
    • Flue Gas Desulfurization
    • Food & Beverage
    • Landfills
    • Lithium Extraction & Refining
    • Microelectronics
    • Minimal & Zero Liquid Discharge
    • Mining & Metals
    • Municipal & Wastewater Reuse
    • Petrochemical & Refining
    • PFAS
    • Pharmaceutical
    • Phys-Chem Separations
    • Pre-Treatment
    • Power Generation
    • Process Optimization
    • Pulp & Paper
    • Remediation
    • RO Recovery Boosting
    • Scale Removal

    IonSelect Solutions Related Resources

    IonSelect Solutions Related Products


    Real-Time Sensor

    ScaleSense Real-Time Scaling Ion Sensor

    An automated, real-time sensor for saline waters that measures calcium (Ca2+), barium (Ba2+), sulfate (SO42-) ions and silica (SiO2). ScaleSense is robust and corrosion-resistant and functions accurately and precisely, even at extremely high-TDS.


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    XtremeRO/NF Brine 


    Xtreme Reverse Osmosis device Saltworks Technologies

    Next-generation water-maker and brine-concentrator based on reverse osmosis that achieves extreme freshwater recoveries, enabling cost-effective brine management and treatment of challenging organic-laden waters including oil & gas produced waters.

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    BrineRefine Chemical Softening System

    BrineRefine for Chemical Softening of Brine

    Smart, compact, modular chemical softening system that reduces costs with precision dosing and built-in solids management. Improves recovery and minimizes fouling risk with intelligent controls that communicate with downstream assets, like RO or evaporators.

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    Flex EDR


    Flex EDR stack

    Flex EDR is an advanced electrodialysis reversal (EDR) system, leveraging our next generation ion exchange membranes. It requires less pre-treatment, tolerates oils and organics, selectively removes ions and uses fewer chemicals.


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