A DUE has developed a water pretreatment and treatment system (WTP) for a major PEPSI COLA bottler, ensuring compliance with extremely stringent specifications, despite several critical issues: 1. a high concentration of heavy metals such as aluminium exceeding 3.5 ppm against a limit of 0.2 ppm; 2. raw river water (a variable flow rate and a high pollutant load); 3. high flow rates (230,000 l/h of pretreatment water to obtain a flow rate of 170,000 l/h of treated outlet water), 4. special surface finishes of filters and tanks.