Water challenges are becoming more complex.

Some facilities need to convert seawater into fresh water. Others need to recover more water from industrial wastewater. Many treatment plants are also looking for ways to improve efficiency while maintaining high-quality output.

These different requirements need more than one membrane solution.

This is where Hydranautics – A Nitto Group Company brings its expertise in membrane technology. With decades of experience in reverse osmosis and separation technologies, the company develops membrane solutions for desalination, water reuse, industrial processes and high-purity water applications.

At WETEX 2026, visitors can explore how Hydranautics technologies support different water-treatment challenges, from high-salinity seawater to difficult industrial wastewater and energy-conscious RO operations.

Start with the Water You Need to Treat

Choosing an RO membrane should begin with the feedwater and the required treated-water quality.

Is the source industrial wastewater?

Is it high-salinity seawater?

Or does the plant need an efficient RO solution for brackish water, wastewater reuse or other water-treatment applications?

The answer helps determine which membrane technology should be considered.

PRO Series – When Industrial Wastewater Is Difficult to Treat

Industrial wastewater can contain dissolved solids, organic substances, colloidal particles and other contaminants that make RO operation more demanding.

As facilities also look to recover and reuse more water, controlling fouling while maintaining rejection becomes increasingly important.

The Hydranautics PRO Series is developed for demanding industrial wastewater applications, including water reuse and high-recovery MLD and ZLD processes.

Within the range, different PRO membranes address different operating requirements. PRO-XR1-X-LD, for example, combines surface treatment and an optimised flow-channel structure to help reduce the adhesion of organic matter and fine colloidal particles.

The PRO Series can be considered where plants are dealing with:

  • Difficult industrial wastewater
  • Frequent membrane fouling
  • Water-reuse requirements
  • Higher recovery targets
  • MLD and ZLD applications
  • Demanding permeate-quality requirements

Rather than using the same membrane for every wastewater stream, the PRO portfolio allows membrane selection to be matched more closely to the treatment challenge.

Hydranautics RO Membrane

SWC5-LD – When the Feedwater Is Seawater

Seawater presents a very different problem: high salt concentration.

A membrane used for seawater desalination needs strong salt rejection while continuing to produce useful permeate under demanding operating conditions.

The Hydranautics SWC5-LD is developed for seawater and highly saline water applications. It combines high salt rejection with Low Differential LD Technology®, which helps minimise colloidal fouling when supported by appropriate pretreatment.

This makes the seawater reverse osmosis membrane relevant for applications such as:

  • Seawater desalination
  • Municipal water production
  • Coastal water-treatment plants
  • Industrial desalination
  • High-TDS feedwater treatment

For desalination projects, SWC5-LD provides an option where permeate quality, salt rejection and reliable membrane operation all need to be considered together.

ESPA2-LD – When Energy Use Is Part of the RO Decision

Some RO systems face a different question:

Can we achieve the required water quality without operating at unnecessarily high pressure?

Hydranautics ESPA2-LD is part of its Energy Saving Polyamide membrane range. It combines strong salt rejection and permeate flow with lower-pressure operation.

This makes the low pressure RO membrane suitable for applications such as:

  • Brackish water treatment
  • Municipal wastewater reclamation
  • Drinking-water production
  • Industrial process water
  • Water-reuse systems

For facilities where pumping energy contributes significantly to RO operating costs, selecting a membrane that performs effectively at lower pressure can support a more energy-conscious treatment approach.

Explore the Right Membrane for Your Application at WETEX 2026

The three Hydranautics solutions demonstrate why membrane selection cannot begin with the membrane name alone.

It begins with the water.

Difficult industrial wastewater?

The PRO Series provides options for fouling-prone and high-recovery applications.

Seawater with high salt content?

SWC5-LD is developed for seawater desalination and high salt rejection.

Looking to operate RO at lower pressure?

ESPA2-LD brings energy-saving membrane technology into the discussion.

What Should You Know Before Choosing an RO Membrane?

A few project details can make membrane selection much clearer.

Before discussing an RO solution, it is useful to understand:

  • Feedwater source
  • Feedwater TDS
  • Organic and colloidal content
  • Required permeate quality
  • Target water recovery
  • Available operating pressure
  • Pretreatment system
  • Current fouling or cleaning problems
  • Water reuse or discharge objective

These factors help identify whether the main priority is fouling resistance, salt rejection, lower operating pressure, higher recovery or a combination of requirements.

Bring Your Water Treatment Challenge to Stand SS-C8

At the Water, Energy, Technology and Environment Exhibition, visitors do not need to begin the conversation by knowing which membrane model they require.

Begin with the water you need to treat.

At Sheikh Saeed Hall 1 (SS1), Stand SS-C8, the Dutco Tennant team can discuss your feedwater conditions, treatment goals and RO requirements and help you explore the relevant Hydranautics technology.

For consultants, plant operators, utilities and project teams searching for a Membrane supplier at WETEX, the showcase provides an opportunity to explore membrane solutions for three very different treatment situations—industrial wastewater, seawater desalination and lower-pressure RO operation.

Visit Stand SS-C8 from 20–22 October 2026 at Dubai World Trade Centre and explore Hydranautics membrane technologies around the water-treatment challenge your project actually needs to solve.