What is the primary use of activated sludge in the aeration tank?

The primary use of activated sludge in the aeration tank is to promote the digestion of organic materials. Activated sludge consists of a mixture of microorganisms, primarily bacteria, that thrive in an aerated environment. When wastewater enters the aeration tank, the activated sludge effectively consumes organic matter present in the water. This process involves the microorganisms metabolizing the organic materials, leading to their breakdown into simpler compounds, which can then be further treated or removed from the wastewater system.

This biological treatment process is essential in reducing the concentration of pollutants and organic material in the wastewater before it moves on to further treatment steps, such as sedimentation or filtration. Consequently, the role of activated sludge is crucial in ensuring the efficiency and effectiveness of the overall wastewater treatment process.

While providing oxygen for chemical reactions is an important factor in the aeration process, the primary goal of introducing activated sludge is not merely to supply oxygen but to utilize the bacteria for the digestion of organic matter. Additionally, although pH management is important in wastewater treatment, that is not the primary function of activated sludge in the aeration tank.