Aerobic treatment units (ATUs) are systems designed to treat wastewater using aerobic bacteria. These bacteria require oxygen to break down organic matter in the wastewater, making the process efficient and effective. ATUs are often used in areas without access to centralized sewage systems, providing a sustainable solution for wastewater management. The treatment process in ATUs typically involves several stages, including aeration, settling, and disinfection. During aeration, air is pumped into the wastewater to promote the growth of aerobic bacteria. After treatment, the cleaned water can be safely discharged or reused, helping to protect the environment and public health.