Science Section 3 Figure 33

What is the first step in the primary treatment of wastewater?

• Aeration tank

• Screens

• Secondary clarifier

• Disinfectant

What is the purpose of the grit chamber in wastewater treatment?

• To add disinfectant

• To remove large particles

• To aerate the water

• To return sludge

What happens in the aeration tank during secondary treatment?

• Water is disinfected

• Air is added to the water

• Sludge is removed

• Water is screened

What is the role of the secondary clarifier in wastewater treatment?

• To add air to the water

• To remove activated sludge

• To screen the water

• To add disinfectant

What is added to the water before it is discharged to surface water?

• Sludge

• Air

• Disinfectant

• Grit

What is the final product of the secondary treatment process?

• Raw sewage

• Primary effluent

• Secondary effluent

• Grit disposal

What is the purpose of the return sludge pump?

• To add disinfectant

• To return sludge to the aeration tank

• To remove grit

• To screen the water

What is the primary effluent?

• Water after secondary treatment

• Water after primary treatment

• Raw sewage

• Disinfected water

What is the role of the air compressor in the wastewater treatment process?

• To add air to the aeration tank

• To remove sludge

• To disinfect the water

• To screen the water

What is the purpose of sludge treatment and disposal?

• To add air to the water

• To remove and manage sludge

• To disinfect the water

• To screen the water