3.3 (Waste Water Treatment)

Question 1

Influent

Answer 1

Wastewater or other liquid flowing into a reservoir, basin, or treatment plant.

Question 2

Primary Treatment Steps?

Answer 2

Screening/Filtration

1) passes through a screen to remove trash and large objects

2) goes into chambers and tanks where smaller particles settle out

Question 3

Secondary Treatment Steps?

Answer 3

wastewater flows into large
aeration tanks filled with microorganisms that break down organic wastes

Question 4

Tertiary Treatment

Answer 4

Chlorination

adding chlorine to disinfect it and kill germs

Question 5

Sludge

Answer 5

• The SOLIDS that are collected are processed in large digester tanks which act as stomachs.
• Once digested, the resulting sludge can be put to beneficial use as fertilizer, if it meets strict contaminant levels.
• If not, it is typically disposed of at a landfill

Question 6

Effluent

Answer 6

Cleaned effluent (waste) is discharged into a
waterbody.