The Zix-Zak: the ion-exchange heart of zero-waste recovery.
Recovery lives or dies at the ion level. The Zix-Zak — the IChemE award-winning ion-exchange system at the core of Desalus — selectively captures the dissolved ions in inland brackish water between 5,000 and 50,000 mg/L TDS, driving 99%+ recovery with zero brine. Desalus funds, builds, owns and operates it all; you buy back clean water at an attractive rate per thousand gallons, while the recovered salts become fertilizer Desalus sells.
Conventional treatment hits an ion wall — and stops short.
Membranes push back as dissolved ions concentrate. The osmotic pressure climbs, fouling sets in, and recovery stalls long before the water is exhausted. What's left is a high-TDS reject you have to pond or haul — and the very ions that could have been product end up as waste.
- Recovery plateaus as ion concentration rises toward 50,000 mg/L, leaving water on the table.
- Mixed reject is useless — ions jumbled together in brine can't be sold and must be disposed of.
- Scaling and fouling turn the back end of the plant into a maintenance and downtime sink.
Where membrane recovery stalls
Ion exchange works on the ions directly, so the Zix-Zak keeps recovering exactly where membranes give up.
Win at the ion level, and recovery follows.
The Zix-Zak is an award-winning ion-exchange system engineered to capture the dissolved ions in inland brackish water selectively — so the water comes back clean for you and the salts come out sorted as fertilizer Desalus sells.
IChemE award-winning
Recognized engineering at the heart of the Desalus service — ion exchange proven to perform where membranes alone stall.
Past the recovery ceiling
By working on ions directly, the Zix-Zak pushes recovery beyond the membrane plateau to 99%+ with no reject stream.
Sorted salts, real product
Ions are captured selectively rather than jumbled into brine, so the recovered solids finish as farm-grade fertilizer.
Built for 5k–50k mg/L
Tuned for the inland brackish band where rising ion concentration defeats conventional membrane recovery.
Lower water cost, zero capital
No capital outlay and no operating burden. Desalus funds, builds and runs everything — you pay only for clean water delivered, at an attractive rate per thousand gallons that beats your current all-in cost.
Engineered as a service
Desalus configures and operates the Zix-Zak around your exact ion profile and volumes — recovery tuned to your water.
Where ion concentration defeats membranes
The Zix-Zak is built for 5,000–50,000 mg/L total dissolved solids — the inland band where rising ion concentration drives osmotic pressure up and membrane recovery down.
The highlighted band is where ion exchange earns its keep — and where the Zix-Zak turns a recovery ceiling into a clean ceiling-breaker.
The Zix-Zak vs. membranes alone
The same influent ions, two very different recovery curves.
| Outcome | Desalus | Evaporation ponds | Conventional RO |
|---|---|---|---|
| Behavior at high TDS | Keeps recovering | Water lost to air | Recovery plateaus |
| Water recovery | 99%+ | Low | Stalls inland |
| Brine / reject stream | None | Permanent pond | Yes — must be managed |
| Recovered ions | Sorted to fertilizer | Jumbled in sludge | Mixed in brine |
| Capital you outlay | None — Desalus owns & operates | You fund & build | You fund & build |
| What you pay for | Clean water, per 1,000 gal | Disposal, forever | Power + disposal |
| Your all-in water cost | Lowest & predictable | Highest | High |
From water report to ion-level recovery in four steps.
It starts with your numbers. Send Desalus a full-panel water quality and volume report, and you'll get a site-specific model of exactly how the Zix-Zak recovers your water and ions — and what they're worth.
Start with your water reportShare your full-panel report
Send your water quality and volume data through the Desalus contact form. The richer the ion panel, the sharper the model.
Get an ion-level recovery model
Desalus quantifies recoverable water, your clean-water rate per thousand gallons, and the capital and disposal costs you avoid.
Desalus builds & operates the Zix-Zak
Desalus capitalizes, installs and runs the award-winning ion-exchange system around your ion profile and volumes — no capex or operating burden for you.
Buy back clean water, waste-free
You purchase clean water at your agreed rate per thousand gallons. Brine never exists, and the sorted ions become fertilizer Desalus markets — which is how your water price stays low.
Raise profit. Eliminate waste. Flourish community.
The Zix-Zak wins the battle where it's actually fought — at the ion — turning the hardest, highest-TDS water into affordable clean water for you, with sorted fertilizer Desalus sells.
What engineers ask about the Zix-Zak
What is the Zix-Zak?
It's the IChemE award-winning ion-exchange system at the heart of the Desalus recovery process. Where membranes push water against rising osmotic pressure, the Zix-Zak acts on the dissolved ions directly — capturing them selectively so the water comes back clean and the salts come out sorted, ready to finish as fertilizer.
How does the Desalus model work — what do I actually pay?
Desalus capitalizes, builds, owns, operates and maintains the Zix-Zak facility. You don't buy equipment or run anything — you simply purchase the clean water it produces, at an attractive rate per thousand gallons. Because Desalus recovers and sells the resulting fertilizer, we can price your water below conventional treat-and-dispose alternatives while leaving zero waste. The fertilizer revenue is Desalus'; your benefit is cheaper water and no liability.
Is this for seawater desalination?
No. The Zix-Zak is purpose-built for inland brackish water in the 5,000–50,000 mg/L TDS range — mines, municipalities, power and industry with no ocean to discharge to, where rising ion concentration defeats conventional membrane recovery.
Why does ion exchange beat membranes here?
Membrane recovery stalls as ions concentrate and osmotic pressure climbs. Ion exchange works on the ions themselves, so the Zix-Zak keeps recovering past the membrane plateau — and because ions are captured selectively, the by-product is sortable fertilizer rather than mixed brine.
How do I know it suits my water?
Send Desalus a full-panel water quality and volume report through the contact form. You'll receive a site-specific model of recovery, your clean-water rate per thousand gallons, and the capital and disposal costs you avoid for your exact ion profile — before any commitment.
See what award-winning ion exchange recovers from your water.
Send Desalus a full-panel water quality and volume report and get a site-specific Zix-Zak model of clean water recovery, your rate per thousand gallons, and the costs you avoid on the water you already manage.
No obligation. The report drives a site-specific model of recovery, your clean-water rate per thousand gallons, and the costs you avoid.
- Quantified water recovery for your exact ion profile
- Your attractive clean-water rate per thousand gallons
- Avoided brine, pond, disposal and capital costs
- Zero capital outlay — Desalus funds, builds & operates it all