Grit removal protects pumps and pipes by removing grit that could cause wear. Which equipment is protected?

• A. Clarifiers
• B. Pumps and pipes
• C. Aeration basins
• D. Digesters

Answer: (B)

Grit removal targets abrasive solids that can wear down moving parts, so it mainly protects equipment that handles pumped flow. Grit in wastewater is hard and abrasive; when it enters pumps and the piping system, it can cause impeller wear, seal damage, valve wear, and erosion of pipe walls. Removing these gritty particles before they reach the pumping and conveying equipment reduces abrasion, extends pump life, and lowers maintenance and energy costs. Other units like clarifiers, aeration basins, and digesters are focused on settling, biological treatment, and digestion, so the primary benefit of grit removal is most directly seen in protecting pumps and pipes.