UV Water Treatment for seawater desalination plant
A clean, fast and flexible way to control microbial risk across pre-treatment, RO feed, permeate polishing and storage — without mercury, without membrane-damaging oxidants.
The Challenge
Microbes are the hidden cost of reverse osmosis.
Bacteria, viruses, algae and plankton in raw seawater clog filters, form biofilms on RO membranes, raise differential pressure and shorten membrane life. Even after RO, permeate can be re-contaminated in tanks and distribution networks.
Four high-impact placements across the desalination train.
UVC LED is not a replacement for coagulation, filtration or membranes — it is the precision disinfection layer that makes every other stage run cleaner and longer.
Seawater Pre-treatment
Placed upstream of filtration units to inactivate bacteria, viruses and algae in raw seawater, reducing biofouling load on downstream RO membranes.
Inactivates bacteria & viruses
Suppresses algal activity
Cuts chemical dosing
RO Feed Biofouling Control
A UVC LED reactor on the RO feed line reduces live microbial counts, minimising biofilm formation on polyamide membranes without oxidative chlorine damage.
No chlorine residual
Membrane-safe
Stable operating pressure
Permeate Terminal Disinfection
RO permeate has high UV transmittance, allowing UVC LED to deliver reliable final disinfection before storage tanks, distribution lines or drinking water polishing.
High UV transmittance
Point-of-entry safety
Storage tank protection
Onboard & Island Systems
Mercury-free, instant-start UVC LEDs are ideal for intermittent operation in ship desalinators, offshore platforms and decentralised island water units.
Mercury-free & safe
Instant-start capable
Modular integration
From intake to tap — where UV works hardest.
A typical RO desalination flow with two UVC LED insertion points that materially change fouling behaviour and permeate safety.
Intake & Screening
Raw seawater enters through screens and grit removal before conditioning.
UVC LED Pre-disinfection
Reduces microbial and algal load, protecting downstream media filters.
Filtration & UF
Coagulation, sand filtration or ultrafiltration remove particulates.
RO Membrane Stage
High-pressure reverse osmosis rejects salts and remaining microorganisms.
UVC LED Polishing
Final disinfection of high-UVT permeate before storage and distribution.
Storage & Distribution
In-line UVC LED modules protect tanks, valves and outlet points.
Beyond a lamp swap — a new operating model.
The change is not just the light source. It is how the disinfection unit is shaped, controlled and integrated into the desalination process.
Discuss your projectMercury Free
Eliminates hazardous mercury handling and disposal obligations across sensitive marine and food-grade environments.
Instant On/Off
Zero warm-up time supports intermittent duty cycles on vessels, islands and small distributed desalination units.
Design Freedom
Compact packages arrange freely inside pipes, tanks and membrane housings, enabling truly modular reactors.
Adaptive Control
Zone-level or die-level dimming tunes UV output to real-time flow and water quality — from rated power to on-demand.
Membrane Friendly
No residual chlorine is introduced, protecting polyamide RO membranes from oxidative degradation.
Sustainable
Lower lifecycle waste and reduced chemical logistics support greener desalination operations.
How UVC LED stacks up against traditional disinfection.
Every technology has a place. Here is where UVC LED fits — and where it complements, rather than replaces, existing methods.
| Method | Strengths | Limitations |
|---|---|---|
| Low-Pressure Mercury Lamp | Mature, high throughput | Contains mercury, slow start, bulky |
| Chlorine Disinfection | Low cost, residual protection | DBPs, damages RO membranes |
| Ozone Disinfection | Strong oxidation, removes odour | Complex, bromate risk, costly |
| Chlorine Dioxide | Strong biocide, some residual | On-site chemistry, safety burden |
| UVC LED (Ours) | Mercury-free, modular, membrane-safe, adaptive | No residual — best paired with system design |
Common questions from desalination engineers.
Can UVC LED replace RO membranes?
No. UV cannot penetrate RO membranes and does not replace their physical rejection. UVC LED is used upstream, downstream and in storage — not inside the membrane.
Does UVC LED damage polyamide RO membranes?
Where is UVC LED most effective in a desalination plant?
Is UVC LED suitable for small marine or island units?
Does UVC LED provide residual protection in the distribution network?