چکیده سخنرانی آقای پروفسور Maxime Pontié
 Water treatment using membranes: desalination of brackish/sea or surface waters treatment resources: Big size unit and isolated pilot-A sustainable approach
Maxime PONTIE
Abstract: The utilization of membrane technology in water treatment, particularly in desalination processes, has garnered considerable attention as a sustainable method for supplying clean water resources, especially in areas with limited freshwater reserves. Membrane-based techniques are effective in treating brackish, sea, and surface waters. This discussion focuses on large-scale units and isolated pilot approaches for sustainable desalination and water treatment. Large-scale membrane-based desalination plants offer numerous advantages, including increased efficiency, reduced energy consumption, and lower operational costs than traditional thermal desalination methods. Reverse osmosis (RO), a widely used membrane process, utilizes high pressure to push saltwater through a semi-permeable membrane, separating freshwater from salts and other impurities. Large-scale RO plants can process millions of gallons of water daily, providing a sustainable source of drinking water. Nanofiltration (NF) is a pressure-driven membrane process that selectively removes ions, organic molecules, and suspended particles from water. It can be employed as a pre-treatment step before RO or as a standalone process for water softening and minor desalination. Electrodialysis (ED) employs direct current to drive ions through ion-selective membranes, effectively separating salts and other dissolved ions from water. Large-scale ED plants can efficiently treat seawater and brackish water. Isolated pilot-scale membrane systems are smaller, modular units designed for specific water sources and treatment requirements. These pilot systems can be easily adapted to different water sources and treatment needs, making them suitable for remote and isolated locations. The smaller scale of pilot systems reduces capital investment and operating costs, making them more affordable for smaller communities or decentralized water treatment applications. Pilot systems can be optimized for energy efficiency, reducing the overall energy consumption and environmental impact of the desalination process. Isolated pilot systems allow for better monitoring and research on membrane performance, water quality, and process optimization, contributing to developing more efficient and sustainable membrane technologies. In summary, both large-scale units and isolated pilot approaches offer sustainable solutions for water treatment using membranes, particularly in desalination processes. Large-scale membrane systems provide high efficiency and lower operational costs, while isolated pilot systems offer flexibility, cost-effectiveness, and research opportunities for specific water treatment needs.
Keywords: Membrane process; seawater; Reverse osmosis; nanofiltration; life cycle; energy consumption
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