Nanobubble Energy, a knowledge-based Company, in cooperation with Itok Afarinan Fanavari Co., has succeeded in reducing at least 30% of chlorine consumption by installing a nano chlorine device to disinfect the effluent of the wastewater treatment plant. This system was built for the first time in the world due to the characteristics of nano chlorine and by increasing the efficiency and uniformity of the chlorine part. According to the economic calculations, it was determined that 30% reduction in brine water and, as a result, a reduction in operating costs, the cost of preparing a nano-chlorine device for the disinfection of wastewater treatment plants will pay off in less than 3 years.