GATE CE 2022 Set 1 — Question 61
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Environmental Engineering → Drinking Water Treatment → Sedimentation
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Question
A water treatment plant has a sedimentation basin of depth , width , and length . The water inflow rate is . The removal fraction of particles having a settling velocity of is_______. (round off to one decimal place)
(Consider the particle density as and liquid density as )
(Consider the particle density as and liquid density as )
Correct answer
0.38 to 0.42
Solution
The removal efficiency () of a sedimentation basin for a particle with settling velocity is given by , where is the Surface Overflow Rate (SOR).
1.Calculate the Surface Area ():
2.Calculate the Surface Overflow Rate ():
3.Calculate the removal fraction:
Rounding to one decimal place, the removal fraction is . Note that the depth and density values provided are extraneous information for this specific calculation.Continue learning with Success Tracker
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