01
Brackish salinity
Target range 1–20 g/L TDS. Recovery targets and system configuration depend on source chemistry and operating parameters.
Core business
High-recovery treatment for brackish groundwater.
SonixED™ is Hydrovolta’s core platform for brackish water in the 1–20 g/L TDS range — well and borehole water that is too salty to use and too valuable to abandon. It recovers more usable water, removes target ions selectively, and addresses the scaling dependencies that defeat conventional membrane systems in hard water and silica-laden sources.
Up to 95%recovery in a single pass
As little as 5%brine at 1–3 g/L
50–90%CIP reduction in validated contexts
Send your water analysis
TDS and hardness are enough to start. We respond within 3 business days.
Something went wrong. Please email info@hydrovolta.com.
Assessment request received
Our engineering team will review your water data and respond within 3 business days.
Recovery by feed salinity
Recovery depends on feed salinity.
One number cannot describe every source. What the plant recovers, and how much brine it leaves, follows the salinity of the feed.
| Feed TDS | Recovery | Brine |
|---|---|---|
| 1–3 g/L | Up to 95% (single pass) | ~5% |
| 3–10 g/L | ~90% | ~10% |
| 10–20 g/L | 75–85% | 15–25% |
Figures depend on source chemistry and operating parameters. Send a water analysis and we state the expected envelope for your feed.
The challenge
The water is there. Scaling, contamination, rising salinity and brine disposal are the barriers.
Many brackish groundwater sources are technically and commercially viable — but not with conventional membrane systems. Silica fouling, variable salinity, high hardness, and brine disposal constraints compound in real operating conditions.
02
Scaling & silica fouling
Silica forms amorphous deposits that chemical cleaning cannot remove once established. SonixED™’s acoustic cavitation prevents nucleation before it occurs.
03
Ion-specific contamination
Nitrate, sodium, fluoride, and chloride require targeted removal. SonixED™’s selective membrane removes target ions while retaining Ca²¹ and Mg²¹.
04
Brine disposal constraints
SonixED™ leaves as little as 5% brine at 1–3 g/L — significantly less than conventional membrane treatment, reducing disposal burden and liability.
How SonixED™ solves it
Electrodialysis reversal. Ultrasound anti-scaling. Selective membranes.
Three integrated mechanisms each addressing a specific failure mode of conventional treatment. Together they deliver a combination of recovery rate, scaling resistance, and ion selectivity that is not achievable with standard RO configurations for difficult brackish sources.
- EDR: stable output under variable TDS. Polarity reversal cleans membranes without chemicals.
- Ultrasound: prevents silica and hard-water scaling at source. 50–90% CIP reduction in validated contexts.
- Selective membrane: removes NO₃¯, Na¹, Cl¯, F¯ while retaining Ca²¹, Mg²¹. No remineralisation required.
- High recovery: up to 98% water recovery target. Where brine chemistry supports it, downstream valorization is evaluated.
Validated in the field
Active in Morocco and Perth.
Performance claims are tied to real operating data from active deployments, not laboratory projections.
Is SonixED™ right for your source?
Qualification criteria.
Read more: selective nitrate removal →·brackish water for irrigation →·electrodialysis vs reverse osmosis →
SonixED™ performs best in specific conditions. Hydrovolta qualifies every project honestly — including when a different technology is a better fit.
| Source characteristic | SonixED™ fit | Notes |
|---|---|---|
| TDS 1–20 g/L | Strong fit | Core operating range. Best economics vs RO at this TDS level. |
| High silica (>30 mg/l) | Strong fit | Ultrasound prevents silica fouling that defeats conventional membranes. |
| High hardness (Ca + Mg >300 mg/l) | Strong fit | CaCO₃ and MgSO₄ scaling controlled by acoustic cavitation. |
| Selective nitrate removal required | Strong fit | Validated at Water Corporation Perth. EU limit 50 mg/l NO₃¯, already in force. |
| Inland site / no brine discharge | Strong fit | As little as 5% brine at 1–3 g/L minimises disposal burden. RO: roughly a third to a half of feed. |
| TDS <1 g/L | Borderline | Conventional softening or nano-filtration may be more cost-effective. |
| Not our use case: seawater (~35 g/L) | Not primary use case | SWRO typically preferred. Hydrovolta focuses on the brine stream from existing SWRO. |
Not sure where your source falls? Send your water analysis → Hydrovolta will assess fit without obligation.
See it operating
SonixED™ at a live groundwater deployment.
A walkthrough of active Hydrovolta equipment treating brackish groundwater in the field.
Assess your source
Send your groundwater analysis.
TDS, hardness, nitrate, silica, target flow, target use. We assess fit and design the configuration around your specific chemistry.
