Tennessee Wastewater Operator Practice Exam

How often should the chlorine contact chamber be drained and cleaned?

1. Monthly

2. Quarterly

3. Annually

4. Biannually

The correct answer is: Annually

The chlorine contact chamber should be drained and cleaned annually to maintain optimal performance and ensure effective disinfection of wastewater. Regular maintenance is crucial as the contact chamber can accumulate debris, sludge, and residual chlorine compounds, which can impair the disinfection process. By adhering to an annual cleaning schedule, operators can minimize the risk of bacteria regrowth and ensure that the chlorine remains effective for treating the wastewater as it passes through. While more frequent cleanings, such as monthly or quarterly, might seem beneficial, they may not be necessary unless specific issues arise. Annual maintenance strikes a balance between ensuring the chamber is clean enough for effective operation while avoiding excessive downtime and resource use associated with more frequent cleaning. This scheduled approach helps operators efficiently manage maintenance tasks and ensures compliance with health and environmental regulations.