Question

The incubation period and the temperature used normally for the BOD are estimated in the laboratory as ___ and ___ .

• A. 5 days, 27°C
• B. 7 days, 25°C
• C. 5 days, 20°C
• D. 4 days, 15°C

Hint:

For accurate BOD measurements, always ensure that the incubation period and temperature are maintained at 5 days and 20°C as per standard laboratory protocols.

Answer 1

The Correct Option is C

The BOD (Biochemical Oxygen Demand) test is used to estimate the amount of oxygen consumed by microorganisms in the treatment of wastewater. The standard incubation period for BOD testing is 5 days at a temperature of 20°C, as this condition provides an accurate measure of the biochemical activity occurring in the sample under typical environmental conditions. The other options deviate from the standard procedure.