Waste Water Treatment

Question 1

Ammonia stripping

Answer 1

Ammonia reacts with water to form ammonium hydroxide. Lime is added to convert ammonium hydroxide to ammonia gas? Which is discharged into the atmosphere.
Does not remove nitrite and organic nitrogen
Could cause air pollution

Question 2

Anammox

Answer 2

Anaerobic ammonium oxidation.
Oxidation of ammonia using nitrite as the oxidant
Uses two types of bacteria- nitrifying and anammox
No need for an organic substrate, lower power requirement

Question 3

Denitrification

Answer 3

Converting nitrogen to gas N2
Anaerobic environment, microorganisms use oxygen from NO3 to make N2 gas

Question 4

Primary treatment

Answer 4

Removes solids from wastewater

Question 5

Secondary treatment

Answer 5

Removes dissolved nutrients & pathogens from wastewater

Question 6

Tertiary treatment

Answer 6

Removing the chlorine that was used to disinfect water