Drinking and Waste Water Treatment PLTW E.S.

Which of the following is used as a disinfectant in the water treatment process?

• Leaves and plastic

• Bacteria

• UV light, ozone, or chlorine

• Nitrogen and phosphorus

Waste water is best described as:

• Water that you can cook with.

• Water that goes down your drain or toilet.

• Water in a local pond.

• River water.

What is effluent in the context of water treatment?

• Solid waste

• Liquid waste discharged into a surface body of water

• Chemical pollutants

• Bacterial byproducts

Which treatment process involves the use of a screen or grate?

• Primary Treatment

• Secondary Treatment

• Tertiary Treatment

• Disinfectant

What is the purpose of screens or grates in primary treatment?

• To add oxygen to the water

• To filter out large solids like paper and plastic

• To remove bacteria

• To settle out sediment

What is sludge in the context of wastewater treatment?

• Organic waste

• Inorganic solid waste

• Liquid waste

• Gaseous waste

What is the purpose of tertiary treatment in some plants?

• To add more solids

• To remove more nutrients before discharge

• To add more bacteria

• To increase water temperature

What is the primary purpose of primary treatment in wastewater management?

• To disinfect the water

• To remove large solids and sediment

• To add nutrients

• To remove bacteria

Bacteria are beneficial to wastewater treatment because

• they naturally break down organic matter
• they help solid material to settle out of the wastewater
• the nutrients produced are beneficial to the treated water
• they aren't beneficial

Tags

NGSS.MS-LS2-3

What happens to the effluent after tertiary treatment?

• It is stored

• It is discharged into surface waters

• It is evaporated

• It is frozen