A) reduce BOD
B) increase BOD
C) reduce sedimentation
D) increase sedimentation
Correct Answer: A
Solution :
Biochemical Oxygen Demand or BOD is a chemical procedure for determining the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to breakdown organic material present in a given water sample at certain temperature over a specific time period. It is not a precise quantitative test, although it is widely used as an indication of the organic quality of water. It is most commonly expressed in milligrams of oxygen consumed per litre of sample during five days of incubation at \[{{20}^{o}}C\] . and is often used as robust surrogate of the degree of organic pollution of water. BOD can be used as a gauge of the effectiveness of waste water treatment plants.
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