NEET2007BotanyEnvironmental IssuesActual
In which one of the following the BOD (biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent ( PE ) and sugar mill effluent (SE) have been arranged in ascending order?
Options
- ASE < PE < S < DE
- BPE < S < SE < DE
- CS < DE < PE < SE
- DSE < S < PE < DE
Correct answer
C. S < DE < PE < SE
Step-by-step solution
BOD depends on the organic matter present in the effluent. More value of BOD means the water sample is polluted by organic matter. The ascending order of BOD in the given effluents is as follows: Sugar mill effluent > Paper mill effluent > Distillery effluent > Sewage