What is the difference BOD and DO?

What is the difference between BOD & COD?

What is BOD ?

Define BOD .

Define COD and BOD.

Term BOD means:

Show the relationship between BOD and DO with the help of a diagram. What is ill-effect of increase of BOD in water?

What is relationship between BOD and organic matter in sewage?

True or False Presence of high amounts of organic wastes in the sewage decreases both BOD and DO.