What is the primary goal of sewage treatment as discussed in the video?

• To create employment

• To produce clean drinking water

• To reduce nutrient pollution

• To generate energy from waste

What does primary treatment remove from sewage?

• Large solid materials

• Dissolved gases

• Microbes

• Nutrients like nitrogen and phosphorus

What is the role of microbes in secondary sewage treatment?

• To filter out inorganic materials

• To disinfect the water

• To add oxygen to the waste

• To break down organic waste

Tags

NGSS.HS-LS2-3

What does secondary treatment primarily target for removal?

• Primary sludge

• Inorganic solids

• Organic waste

• Chemical reagents

Tags

NGSS.MS-PS1-2

What is the main purpose of adding oxygen in the aeration tank during secondary treatment?

• To remove nitrogen

• To cool down the sewage

• To support microbial breakdown of waste

• To filter out plastic and paper

What percentage of phosphorus is typically removed during secondary treatment?

• 90%

• 30%

• 50%

• 70%

Why is tertiary treatment not universally applied?

• It is cost-prohibitive

• It is not approved by environmental agencies

• It removes too much water

• It is too effective

Tags

NGSS.HS-ESS3-2

NGSS.HS-ETS1-3

Which of the following is not a focus of tertiary treatment?

• Reducing nutrient pollution

• Removing large debris

• Removing phosphates

• Removing nitrates

Tags

NGSS.MS-PS1-2

What is 'effluent' as defined in the video?

• Solid waste removed during primary treatment

• A type of chemical used in disinfection

• Treated wastewater discharged from a plant

• Untreated sewage

Tags

NGSS.MS-LS2-5

Which disinfectant might be used in the treatment process?

• Ultraviolet light

• Oxygen

• Carbon dioxide

• Sand