Primary Wastewater Treatment Quiz

What is primary wastewater treatment?

• Biological treatment

• Removal of large solids

• Chemical treatment

• Filtration

Which process is not typically involved in primary treatment?

• Sedimentation

• Flotation

• Aeration

• Screening

What is the main objective of primary wastewater treatment?

• To remove pathogens

• To reduce BOD and COD

• To remove suspended solids

• To disinfect the water

Which of the following is removed during primary treatment?

• Dissolved organic matter

• Nutrients (N and P)

• Large solids and grit

• Heavy metals

What is the primary treatment tank commonly called?

• Aeration tank

• Primary clarifier

• Trickling filter

• Anaerobic digester

Which type of screening is commonly used in primary wastewater treatment?

• Final screening

• Coarse screening

• Fine screening

• Secondary screening

What happens to the solids that settle out during primary treatment?

• They are treated with chemicals

• They are discharged into the environment

• They are often sent to a digester or landfilled

• They are immediately reused

The removal of which of the following is primarily achieved in primary treatment?

• Dissolved oxygen

• Oil and grease

• Soluble nutrients

• Pathogens

How is the efficiency of primary treatment measured?

• By measuring temperature

• By measuring pH levels

• By measuring the reduction in BOD

• By measuring the dissolved oxygen levels

What kind of tank is usually the first step in a wastewater treatment facility?

• Anaerobic tank

• Primary clarifier

• Aeration tank

• Secondary clarifier