Question

What solid material consists of soil and small pebbles and is removed during primary treatment?

Options

• Grit

• Floating debris

• Biosolids

• Flocs

Answer 1

During primary treatment, floating debris is first removed through sequential filtration. Next, grit, which consists of soil and small pebbles, is removed through sedimentation. These heavy particles settle to the bottom and form part of the primary sludge.