Construction of an industrial wastewater treatment plant, which includes a pipeline with a diameter of 32 inches and a length of approximately 4,000 meters to transport wastewater from southern Tehran, including the installation of microfilters, pumping stations, and the construction of a transmission network using ozone in the water purification process to eliminate microorganisms such as fungi, bacteria, and germs and disinfect. Also, active carbon filters have been used in this project to reduce BOD and COD, which ultimately reduces the use of underground resources and the urban water network, and it has the ability to provide water for green spaces (forests) in the amount of 720 cubic meters, firefighting water in the amount of 70 cubic meters, water required for boilers in the amount of 540 cubic meters, and water required for cooling towers in the amount of 830 cubic meters per hour, which is being constructed with a nominal capacity of 19 million cubic meters per year.