The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of the sample during 5 days of incubation at 20°C.
Salman said:
(Oct 7, 2018)
Because within 5 days 70-80% of food is consumed by bacteria, which is it's favorite food. To consume remaining 20%, it takes 50 to 60 days just to survive as it's not the favorite food for bacteria. So we can't wait for so long. So we compromise with 70% consumption within 5 days.
Aadarsh Devkate said:
(Jan 24, 2019)
Bod 5 days = 20°.
Bod 3 days = 27°.
Kebede said:
(Aug 21, 2019)
Thanks @Salman.
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