BPSC AE CE_QUIZ-2

Sludge treatment is mainly done in order to:

The bacterias which require oxygen for their survival is known as:

In the activated sludge process sludge volume index is used to decide

If initial Dissolved Oxygen (DO) and final DO after 5 days incubation at 20°C in 1.0% dilution sample are 5.0 mg/L and 4.0 mg/L respectively, what is 5-days BOD of the same sample in mg/L?

Aerobic bacteria:

The minimum size of RCC manhole cover in a sewer system is

‘if B.O.D. of waste water sample after 5 days incubation at 20° C is 100 mg/l, deoxygenation rate constant at 20° C is 0.1 per day, ultimate B.O.D. will be

Activated sludge process is an

A solution has 100 mg/L NH₃ and 100 mg/L glucose. Calculate theoretical oxygen demand of this solution?

The units in which both sedimentation & digestion process of sludge take places simultaneously is