Stenco designed, built and implemented a Large Ultrafiltration (UF) and Reverse Osmosis (RO) Plant , for a customer located in the chemical sector, using as input river water with high turbidity and conductivity; and a treatment flow of 125 m3 / h. The Treatment Plant has 22 ultrafiltration modules and 120 membranes of 8”, treating water with 1,450 µS / cm and after the treatment process we obtain water with a quality of less than 2 µS / cm. The new UF + RO Plant allows our client to have water with the qualities and volumes necessary for their production increase, with a high degree of automation and safety in the new Treatment Plant.