What does the acronym ATU stand for in septic system terminology?

The acronym ATU stands for Aerobic Treatment Unit. This term is used in the context of septic systems to describe a type of system that utilizes aerobic bacteria to treat wastewater. Aerobic bacteria require oxygen to survive and are able to break down organic matter more efficiently than anaerobic bacteria, which do not require oxygen.

In an ATU, air is pumped into the treatment tank, creating an oxygen-rich environment that promotes the growth of these beneficial aerobic microorganisms. This method can lead to more complete decomposition of waste materials, resulting in cleaner effluent that is easier to manage and less harmful to the environment when discharged into the soil or a receiving body of water.

Understanding the functionality of an Aerobic Treatment Unit is crucial for septic system design and maintenance, as it impacts the overall efficiency and efficacy of wastewater treatment processes.