APES Wastewater & Landfill

Preliminary treatment

• prevents toxic chemicals.

• removes large objects.

• is unnecessary.

• is useless.

Which substance is used in a sewage treatment system to kill harmful bacteria?

• ammonia

• chlorine

• sand

• soap

What is the purpose of using ultraviolet light on the water?

• To bleach it out
• To "sterilize" any bacteria 
• To remove chlorine
• To kill viruses

Tags

NGSS.HS-ESS3-4

NGSS.HS-PS4-3

NGSS.HS-PS4-5

What is the role of bacteria in the water purification process?

• digested organic matter
• add chlorine
• nothing, we don't want them in there
• add nutrients to the sludge

What is the first step of preliminary wastewater treatment, which removes large items such as plastic wrappers and sticks?

• screening - employs the use of a "bar screen"

• sedimentation

• aeration

• disinfection

List the following steps of Water purification in the correct order

Step P: Water is passed through a screen to remove debris.

Step Q: Pathogenic organisms are killed by chlorination, UV, or ozone.

Step R: Suspended particles clump and settle out.

Step S: A flocking agent, such as alum, is added to the water.

• P, Q, R, S

• S, P, R, Q

• P, S, R, Q

• R, P, S, Q

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The material that is removed from the wastewater, sent through the belt press and requires proper treatment and disposal methods is called

• sediment

• sludge

• mixed liquor

• aeration

Tags

NGSS.MS-ESS3-3

The release of a large amount of sewage overflow into a nearby creek would lead to:

• High DO, High BOD, Low Fecal Coliform
• Low DO, High BOD, Low Fecal Coliform
• Low DO, High BOD, High Fecal Coliform
• Low DO, Low BOD, High Fecal Coliform

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Organic matter like yard waste in landfills is a problem primarily because

• there is a high risk of toxic leaching

• it contains bacteria that spreads disease

• as it breaks down it can dissolve the containment

• it produces methane gas

Tags

NGSS.MS-LS2-4

Where would you expect to find the greatest concentration of leachate?

• at the bottom of the landfill

• at the top of the landfill

• throughout the landfill

• leachate is not created in a landfill