Aeration

Question 1

What are the things that may be achieved in aeration and what are the methods by which aeration may be achieved

Answer 1

Things may be achieved through aeration:
Removal of gases and odors (H2S, CO2, Cl2) and removal of iron and manganese.
Methods by which aeration may be achieved:
Spray nozzles.
Cascade.
Multitray.
water fall.
Diffused aeration.
Mechanical aeration.

Question 2

What are the factors that affect aeration

Answer 2

Concentration of the gas in water ( higher concentration higher removal)
Ratio of exposed area to volume (mote exposed area, more chance for gas to escape)
time of aeration ( more time more release)
diffusivity of gas (more diffusable more escape quickly)
water temperature (gas escape more easily at higher temp)