- BOD is the amount of dissolved oxygen demanded by aerobic biological organisms to break down organic material present in a given water sample at certain temperature.
- COD is a measurement of the oxygen required to oxidize only the soluble organic matter in water.
Which of the statements given above is/are correct?
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
a) 1 only
b) 2 only
c) Both 1 and 2
d) Neither 1 nor 2
Ans- [A]
Explanation– Biochemical Oxygen Demand or BOD is a measure of the amount of dissolved oxygen required for the aerobic bacteria to assimilate and oxidize the organic components present in water or waste water at a certain temperature. Higher the BOD value, higher the organic pollution in water.
Chemical Oxygen Demand or COD is a measure of the capacity of water to consume oxygen during the decomposition of organic matter and the oxidation of inorganic chemicals such as ammonia and nitrite. Statement 2 is thus wrong.
No comments:
Post a Comment