Grit removal general purpose?

• A. To reduce velocity so grit settles
• B. To remove organic matter
• C. To disinfect the water
• D. To aerate the wastewater

Answer: (A)

Grit removal is about slowing the flow long enough for heavy inorganic particles to settle out. By reducing the velocity in a grit chamber, sand, gravel, and other abrasive solids drop to the bottom and can be removed before they reach pumps and downstream equipment. This protects the process from wear, clogs, and unnecessary maintenance. It isn’t about removing organic matter, disinfecting the water, or aerating the wastewater, which are tasks handled by other parts of the treatment system.