The removal of grit in wastewater treatment is important to prevent which problems?

• A. Silting and pump damage
• B. Odor generation
• C. Chlorination
• D. Erosion

Answer: (A)

Grit removal addresses the fact that heavy inorganic particles like sand and gravel are abrasive and tend to settle out in parts of the system. If grit stays in the flow, it builds up (silting) in channels and grit chambers and causes wear and damage to pumps, impellers, valves, and piping. This abrasion also leads to higher maintenance, reduced throughput, and potential clogging of downstream equipment. Odor formation comes from organic matter, chlorination is a disinfection step, and erosion can be a consequence of grit but isn’t the primary issue grit removal targets; the main problem solved by removing grit is preventing silting and pump damage.