- Waste Water Engineering - Section 1
- Waste Water Engineering - Section 2
- Waste Water Engineering - Section 3
- Waste Water Engineering - Section 4
- Waste Water Engineering - Section 5
- Waste Water Engineering - Section 6
- Waste Water Engineering - Section 7


Waste Water Engineering - Engineering
Q1: If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage isA
50 mg/l
B
100 mg/l
C
150 mg/l
D
200 mg/l
E
250 mg/l
ANS:E - 250 mg/l The Biochemical Oxygen Demand (BOD) is determined by the amount of oxygen consumed by microorganisms while decomposing organic matter in a water sample over a specified incubation period. The formula to calculate BOD is: BOD=Depletion of oxygen×Dilution factorVolume of sampleBOD=Volume of sampleDepletion of oxygen×Dilution factor Given:
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