Question

In general, the minimum value of the ratio of BOD to COD for biodegradability of wastewater without acclimatization will be:

• A. 0.2
• B. 0.3
• C. 0.4
• D. 0.6

Hint:

When working with wastewater, always remember that a higher BOD/COD ratio signifies better biodegradability and suitability for biological treatment methods.

Answer 1

The Correct Option is D

The BOD/COD ratio helps in assessing the biodegradability of wastewater. A minimum ratio of 0.6 is generally considered necessary for wastewater to be biodegradable. This means that a significant portion of the organic material can be broken down biologically, signifying better wastewater quality for biological treatment. A lower ratio indicates a higher presence of non-biodegradable substances.