Biological systems are an essential component of many waste water treatment plants, providing a natural way to remove organic matter and pollutants from wastewater. These systems use microorganisms like bacteria, protozoa, and fungi to break down the organic matter in wastewater and convert it into simpler compounds like carbon dioxide, water, and biomass. One of the most common types of biological systems used in waste water treatment is the activated sludge process, which involves the use of aerobic bacteria to break down organic matter in aeration tanks.
