BOD (biological oxygen demand) is

Biological oxygen demand (BOD) is a measure of

High value of BOD (biochemical oxygen demand ) indicates that:

Explain the process of secondary treatment given to the primary effluent up to the point it shows significant change in the level of biological oxygen demand (BOD) in it.

High biological oxygen demand in a water body means ……….

The greater BOD ( biochemical oxygen demand) of waste water indicates.

The greater BOD ( biochemical oxygen demand) of waste water indicates.