Desalination Membrane Innovation From KAUST Enables Energy‑Efficient Seawater And Brine Treatment

Researchers at King Abdullah University of Science and Technology have created a desalination membrane that converts seawater and concentrated brines into freshwater more efficiently. The polymer membrane works at normal temperature and pressure, cuts energy use compared with standard systems, and is already undergoing pilot testing on the KAUST campus for potential wider deployment.

Long-term security of water supplies remains a strategic goal for the Kingdom of Saudi Arabia. The Kingdom is among the largest global producers of desalinated water, and demand is projected to grow as population, industrial activities, and economic diversification plans expand, increasing interest in technologies that limit energy consumption and operational costs.

The research team reports a new class of subnanoporous hydrophobic thin films designed for membrane distillation. These membranes let water vapour pass while blocking salt ions and other impurities. They maintain very high salt rejection even with challenging brines that are usually expensive and technically difficult to handle using conventional desalination methods.

According to the study, the scalable polymer membrane achieves high separation performance at ambient conditions. Operating without extreme heat or pressure reduces overall energy demand. This feature is significant for desalination plants, where electricity and thermal inputs represent major cost factors, especially in regions that already use large amounts of energy for water production.

Professor Noreddine Ghaffour, lead author and specialist in desalination and water treatment at King Abdullah University of Science and Technology, said: "Water and energy are inseparable challenges for Saudi Arabia," and "This work shows that it is possible to desalinate not only seawater, but even highly concentrated brines, using far less energy than traditional approaches. KAUST provides an environment where fundamental materials science can be translated into practical technologies that respond to real needs."

Unlike many advanced desalination ideas that remain limited to laboratory setups, the KAUST desalination membrane is already running at pilot scale on the university campus. Industrial partners are studying the results and examining routes for commercial use. Key features of the technology are summarised below in tabular form.

The project supports broader efforts in Saudi Arabia to improve water sustainability, energy efficiency and applied innovation. As pilot trials progress, the team will study scalability and long-term durability under different operating conditions, providing data for future use across municipal water infrastructure and industrial processes that must handle saline or brine streams.

Findings from the KAUST desalination membrane study indicate potential for more efficient freshwater production in high-demand settings. By combining strong salt rejection, lower energy needs and pilot-scale validation, the work offers a pathway that could support national water strategies and help manage increasing demand for desalinated water within Saudi Arabia.

With inputs from SPA