Question

Difference between chemical oxygen demand and biological oxygen demand

Answer 1

Explanation:

COD means the amount of oxygen required to chemically break down the pollutants.

BOD means the amount of oxygen required biological to breakdown the pollutants.

Answer 2

COD or Chemical Oxygen Demand is the total measurement of all chemicals (organics & in-organics) in the water / waste water; BOD is a measure of, the amount of oxygen that require for the bacteria to degrade the organic components present in water / waste water.

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