Mumbai university > Civil > SEM 8 > Industrial Waste Treatment

Marks: 5M

Year: Dec 2015,

Oxidation pond:

• In oxidation pond, symbiosis relation exists between bacteria and algae.

• During day time in presence of O2, during photosynthesis process, this O2 is used by bacteria for oxidation of organic matter.

• In turn, bacteria will generate their own cell mass and CO2 is ultimate product of this oxidation process by algae.

• Depth of pond is maintained from 0.5-1m so that aerobic condition is maintained and also sunlight can reach upto bottom of ground.

• BOD removal ranges from 75-80%. It is necessary to give further treatment.

Advantages of biological waste treatment:

• Capable of removing 97% of suspended solids

• Biological nitrification without adding chemicals

• Oxidation and nitration achieved

• Biological phosphorous removal

• Solids and liquids separation.

• Removes organics.

• Cost effective

• Easily maintained mechanical work

• Self sustaining system.