What is the primary function of aeration in wastewater treatment?

The primary function of aeration in wastewater treatment is to introduce oxygen for microbial processes. This process is essential because it supports the growth of aerobic microorganisms, which are crucial for breaking down organic matter present in wastewater. These microorganisms use the oxygen to metabolize the organic compounds, effectively reducing the biochemical oxygen demand (BOD) and leading to a cleaner effluent. Aeration not only promotes the breakdown of harmful substances but also aids in the stabilization of the wastewater, making it more environmentally safe for discharge or further treatment.

While eliminating solids, cooling down the wastewater, and increasing water pressure are all aspects that can be relevant in wastewater treatment, they do not capture the primary role of aeration. The focus on facilitating microbial activity through oxygen introduction highlights the critical function that aeration plays in the overall process of biological treatment in wastewater facilities.