Tennessee Wastewater Operator Practice Exam

In a well-operated aerated grit basin, what should the expected mixing pattern resemble?

1. Layered

2. Uneven

3. Even

4. Chaotic

The correct answer is: Even

In a well-operated aerated grit basin, the expected mixing pattern should resemble an even distribution. This even mixing is crucial for effectively separating grit and heavy particles from the wastewater, allowing them to settle at the bottom of the basin. An even mixing pattern ensures that solids, such as grit, have consistent contact with the wastewater, allowing for optimal sedimentation and preventing the formation of dead zones where particles could accumulate without proper treatment. This uniformity helps maintain the efficiency of the aeration process, ensuring that air is distributed evenly throughout the basin, which enhances the overall treatment performance. Maintaining an even mixing pattern also supports the removal of grit at the right locations and minimizes the loss of organic material, leading to better overall efficiency in the wastewater treatment process.