🔍 Key Concepts

• Meaning of each term: detention, comminution, bulking, skimming in a sewage or wastewater context • How sewage treatment systems handle solids before discharge • Difference between physically separating solids (surface or settling) vs. cutting them into smaller pieces

💭 Think About

• Which term is specifically about cutting, grinding, or shredding solids into smaller particles rather than holding or separating them? • In wastewater treatment, what process prepares solids so they can pass through pipes and be more easily biologically treated? • Which options describe storage or removal of solids, and which describes size reduction of solids?

✅ Before You Answer

• Identify which word is related to grinding/shredding or size reduction of solids • Eliminate terms that mean holding/retaining or floating off the top rather than breaking up solids • Think of common sewage treatment equipment names that include or relate to one of these terms