XtremeUF ceramic ultrafiltration removes oils, grease, precipitated by-products, particulate, microbes, and suspended solids.
Brackish Water Desalination
Treatment of alternative water sources: reverse osmosis, brine management, and more
As water scarcity increases for many regions, brackish water can be a critical resource. However, with total dissolved solids (TDS) ranging from 1,500 to 20,000 mg/L, desalination is required. Recovery and management of the desalination brine requires careful consideration. Saltworks provides advanced technologies for cost-effective brackish water desalination and brine management. We can also help you to optimize your existing assets.
Brackish water has more dissolved solids than freshwater, but generally less than seawater. Besides sodium chloride, other prominent dissolved solids include manganese, iron, sodium sulfate/bicarbonate, calcium sulfate/bicarbonate, and occasionally naturally occurring radioactive material (e.g. radium). The compositions can vary extensively and may even change with time.
Brackish groundwater can be extracted from suitable locations, often below freshwater aquifers. It is increasingly used as an alternative to freshwater. For many purposes brackish water is desalinated to lower its salinity and/or total dissolved solids (TDS). Advanced membrane treatment technologies that are used to do this include reverse osmosis (RO) and ultrafiltration (UF). However, since many brackish water resources are inland, consideration of brine minimization and management for these plants is essential.
Go Beyond Conventional UF and RO
Conventional ultrafiltration (UF) and brackish water reverse osmosis (BWRO) plants are low cost and widely available. However, they also operate with conventional recoveries, generating substantial brine volumes that must be managed.
More advanced reverse osmosis processes are emerging, pushing recoveries up by 5–10% through unique hydraulic designs, aggressive anti-scalants, and process controls that help maintain membrane throughput.
Saltworks can perform or support advanced brackish desalination projects, taking you a few steps further. We can help you to optimize the entire process for lowest cost of ownership, including: consideration of risk management, redundancy, and up-time.
Additional Treatment Options
We can measure and remove scaling ions from your upstream BWRO to enable additional RO stages that reach the maximum attainable osmotic pressure limits, boost freshwater recovery, and limit brine waste.
- Use ScaleSense real time scaling ion sensors to maximize plant recovery and protect membrane health.
- Target contaminants of concern or scaling ions such as silica with our BrineRefine chemical reactors, use it to remove specific ions, metals, and other contaminants, reducing TDS and protecting downstream assets.
- Prevent scaling ions from entering brine residuals with ion selective FlexEDR systems, enabling much higher recoveries.
- Protect downstream RO assets with XtremeUF, filter suspended solids, oils & grease with our automated, robust, ceramic ultrafiltration system.
- Add a downstream RO: XtremeRO is our next generation reverse osmosis system, producing freshwater and a low volume brine.
- Achieve MLD/ZLD with SaltMaker for ultimate brine management: our advanced evaporator crystallizers reach maximum recovery with minimum brine or solid waste.
Contact us to learn more about your brackish water desalination strategy can be improved with advanced technologies.
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Saltworks is pleased to announce that recent advancements in reverse osmosis technology are now commercially available. Reduce conventional RO brine volumes by 50%, achieving brine concentrations of 130,000 to 150,000 mg/L TDS with spiral wound RO membranes.
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.