GES can produce ultra-pure water and bacteria-free water for high-demanding applications. This can be achieved through the combination of different water treatment processes such as Reverse Osmosis, Ultrafiltration, Electro- Deionization, and Ultraviolet sterilization. These systems are designed for low energy consumption, easy construction, simple operation, and less maintenance requirement. Ultra-pure water has been applied to the manufacturing of electronic chips and pharmaceutical products