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The Rhode Island AQUA-SEP® vacuum skid for hazardous water treatment on a low-loader trailer, with insulated pipework and yellow access platforms.

Solution · Water & Wastewater

Water & Wastewater Treatment

When a feed is too saline, too fouling, or too complex for reverse osmosis, Petro Sep recovers the water anyway. Our vacuum membrane distillation platform treats produced water, frac flowback, landfill leachate, high-salinity industrial effluent, and RO reject, recovering clean water and concentrating the reject toward zero liquid discharge. Skid-mounted, code-stamped, and engineered to retrofit into existing plants.

Readiness: Proven, deployed

What you get

Outcomes on this vertical.

Water recovery, RO + AQUA-SEP®
Up to ~95%
RO recovers about 40% on its own; routing its reject through AQUA-SEP® can lift overall recovery up to about 95%. In lab tests on frackwater, AQUA-SEP® alone recovered 80 to 90%.
TDS handled
Up to 25%
Far beyond the 6 to 8% practical limit of reverse osmosis.
Recovered-water purity
<10 ppm TDS
Distillate clean enough for direct reuse or compliant discharge.

Built for the streams RO rejects

Reverse osmosis stalls on high salinity, silica, and organics. Vacuum membrane distillation and membrane distillation are thermally driven, so they keep recovering water where RO cannot: up to roughly 25 percent TDS, through fouling loads, at 60 to 85 degrees Celsius rather than a full boil. The result is high water recovery, a distillate below 10 ppm TDS, and a concentrated reject that shrinks disposal volume and sets up zero liquid discharge. We build the system as a skid or packaged plant that retrofits into the existing treatment train.

Frequently asked

Common questions.

How is this different from reverse osmosis?
RO is efficient at low salinity but stalls around 6 to 8 percent TDS and fouls on complex feeds. Our vacuum membrane distillation platform is thermally driven and keeps recovering water up to roughly 25 percent TDS, so it treats the streams RO rejects.
Can it reach zero liquid discharge?
Yes, paired with a thermal or crystallization tail. The membrane stage does the efficient bulk recovery; a final stage takes the concentrate to a solid where the site's limits require it.

Interested in Water & Wastewater Treatment?
Let us scope it.

License the solution or deploy it as a turnkey plant. Either way, send the stream or the spec and we will tell you, honestly, what is proven and what is still in development.