$BOD$ refers to
- Athe oxygen required for bacteria to grow in $1$ Litre of effluent
- Bthe amount of oxygen consumed if all the organic matter in $1000 \ mL$ of water were oxidised by bacteria.
- Cthe amount of oxygen released if all the organic matter in $1000 \ mL$ of water were oxidised by bacteria.
- Dthe amount of oxygen released when all the organic matter was consumed by bacteria in $1$ litre of water
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Similar Questions
Given below are two statements with reference to the secondary treatment of sewage.
Statement $I$: The $BOD$ of effluent increases.
Statement $II$: Flocs of bacteria consume the major part of the organic matter present in the effluent.
In the light of the above statements,choose the most appropriate answer from the options given below.
Statement $I$: The $BOD$ of effluent increases.
Statement $II$: Flocs of bacteria consume the major part of the organic matter present in the effluent.
In the light of the above statements,choose the most appropriate answer from the options given below.
Select the correct option regarding flocs.
Medium
View SolutionSewage or municipal waste should not be directly passed into rivers,streams and other water bodies because
$I.$ it contains human excreta and other organic waste
$II.$ it contains a number of pathogenic microbes
Which of the statement given above is/are correct?
$I.$ it contains human excreta and other organic waste
$II.$ it contains a number of pathogenic microbes
Which of the statement given above is/are correct?
Medium
View SolutionRemoval of suspended,floating,coarse and solid particles in sewage treatment is called . . . . . . .
The primary treatment of sewage water involves
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