What is the role of aeration in wastewater treatment?

Aeration plays a crucial role in wastewater treatment primarily by promoting aerobic decomposition. This process involves introducing air into the wastewater, which facilitates the growth of aerobic microorganisms. These microorganisms are essential as they decompose organic matter present in the wastewater.

During aerobic decomposition, bacteria utilize oxygen to break down organic compounds into simpler substances, resulting in carbon dioxide, water, and biomass. This not only helps in reducing the levels of harmful substances but also significantly improves the quality of the treated water.

While other processes such as removing heavy metals, regulating pH levels, and filtering solids are important in wastewater treatment, they do not directly relate to the specific function of aeration. Aeration specifically targets the biological treatment phase, emphasizing its key role in enhancing the breakdown of organic pollutants through aerobic activity.