Tennessee Wastewater Operator Practice Exam

Which component of the turbo blower directly affects air injection into the process tank?

1. Compressor

2. Diffuser

3. Motor

4. Impeller

The correct answer is: Diffuser

The correct choice relates to the role of the diffuser in the turbo blower system. The diffuser is a crucial component that converts the kinetic energy of the air flow, produced by the compressor, into pressure. When air is injected into the process tank, it is essential for this air to be properly diffused to ensure uniform distribution and efficient oxygen transfer in the wastewater treatment process. By regulating the flow and increase of air pressure, the diffuser helps maintain optimal aeration conditions necessary for effective biological treatment in the tank. Its design influences the efficiency of air delivery, which in turn impacts the performance of the entire treatment system. The diffuser's ability to manage the air flow rates also plays a significant role in preventing issues such as back pressure, which can disrupt the operation of the treatment plant. While the compressor and impeller are important for generating the flow of air, it is the diffuser that directly affects how that air interacts with the process tank. The motor powers the blower system, but it does not play a role in managing how the air is injected into the tank itself.