Basic Wastewater Operator Practice Exam

Which factor is crucial for maintaining consistent air distribution in an aeration tank?

1. The speed of the blower

2. The placement of diffusers

3. The amount of influent

4. Temperature of the influent

The correct answer is: The placement of diffusers

Maintaining consistent air distribution in an aeration tank is primarily dependent on the placement of diffusers. Properly placed diffusers ensure that air is evenly distributed throughout the tank, facilitating optimal mixing and promoting effective biological treatment processes. If diffusers are not positioned correctly, it can lead to areas of poor aeration, which can negatively impact the efficiency of the treatment process by limiting oxygen availability to microorganisms responsible for breaking down pollutants. While factors such as the speed of the blower and the amount of influent can influence aeration effectiveness, they do not address the fundamental issue of how air is distributed within the tank. The temperature of the influent may affect microbial activity, but it does not directly control air distribution. Thus, thoughtful consideration of diffuser placement is essential to achieve the desired oxygen levels and maintain a balanced aeration system in wastewater treatment.