Tennessee Wastewater Operator Practice Exam

What is the primary goal of a grit chamber in wastewater treatment?

1. To remove odors

2. To separate grit from wastewater

3. To aerate sludge

4. To chemically treat effluent

The correct answer is: To separate grit from wastewater

The primary goal of a grit chamber in wastewater treatment is to separate grit from wastewater. Grit refers to the heavier, inorganic particles such as sand, gravel, and shells that can settle to the bottom of the chamber due to their weight. By allowing these particles to settle out of the wastewater, the grit chamber helps to protect downstream equipment, such as pumps and other treatment processes, from wear and damage caused by abrasive materials. This separation process is crucial for maintaining the efficiency of the overall treatment system. In addition to protecting equipment, removing grit enhances the treatment of organic matter and reduces the operational challenges that can arise from handling mixed solids. The effective removal of grit ultimately contributes to more efficient and cost-effective wastewater treatment processes.