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Waste Water Engineering

Q1:

The detention time (t) of a settling tank, may be defined as the time required for

A a particle to travel along its length

B a particle to travel from top surface to bottom sludge zone

C the flow of sewage to fill the tank

D none of these.

ANS:C - the flow of sewage to fill the tank

The detention time (t) of a settling tank is defined as the time required for the flow of sewage or wastewater to fill the tank. Detention time is a critical parameter in wastewater treatment processes as it determines the amount of time wastewater spends in a treatment unit. It affects various aspects of treatment efficiency, including sedimentation, flocculation, and biological processes. So, the correct option is: the flow of sewage to fill the tank.



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