Aerobic Waste Water Treatment uses natural processes that require oxygen. The bacteria that thrive in oxygen-rich environments work to break down and digest the wastewater inside the aerobic treatment unit. It treats the wastewater in stages. The wastewater receives pretreatment before it enters the aerobic unit. This will provide a higher level of treatment than a septic tank. It helps to protect valuable water resources where septic systems are failing. They provides an alternative for sites not suited for septic systems. The treated wastewater leaving the unit requires additional treatment before being returned to the environment.