Aerobic decomposition of sewage involves the breakdown of organic matter in the presence of of oxygen. During this process, microorganisms metabolize the organic compounds, resulting in the production of several end products. The primary compounds generated include nitrate

and water (H₂O). These compounds are indicative of complete oxidation and mineralization of the organic matter, reflecting an efficient aerobic degradation process. The presence of these compounds signifies that the decomposition is occurring in an oxygen-rich environment, promoting the growth and activity of aerobic microorganisms.