Tennessee Wastewater Operator Practice Exam

What type of grit basin may utilize paddles to maintain flow circulation patterns?

1. Primary clarifier

2. Vortex grit basin

3. Skimmer basin

4. Settling basin

The correct answer is: Vortex grit basin

A vortex grit basin is designed to create a swirling motion that helps separate grit from wastewater. This design often incorporates paddles or other mechanical devices that maintain specific flow circulation patterns within the basin. The swirling action enhances the settling of heavier particles, particularly grit, allowing for better separation from lighter organic materials. By maintaining flow circulation, the paddles help ensure that the grit settles effectively, improving the overall efficiency of the grit removal process. This mechanism is essential in wastewater treatment because it helps maintain the quality of the effluent by reducing the amount of solid contaminants that can lead to issues downstream in the treatment process. Understanding the role of a vortex grit basin is crucial for wastewater operators, as proper grit management is vital for protecting equipment and enhancing the efficiency of treatment systems.