A horizontal flow primary clarifier treats waste water in which 10%, 60% and 30% of particles have settling velocities of 0.1 mm/s, 0.2 mm/s and 1.0 mm/s respectively. What would be the total percentage of particles removed if clarifier operates at a surface overflow rate (SOR) of 43.2 m /m . d?

A horizontal flow primary clarifier treats waste water in which 10%, 6

1.	A horizontal flow primary clarifier treats waste water in which 10%, 60% and 30% of particles have settling velocities of 0.1 mm/s, 0.2 mm/s and 1.0 mm/s respectively. What would be the total percentage of particles removed if clarifier operates at a surface overflow rate (SOR) of 43.2 m /m . d?
A.	43%
B.	56%
C.	86%
D.	100%
Answer» C. 86%

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A horizontal flow primary clarifier treats waste water in which 10%, 60% and 30% of particles have settling velocities of 0.1 mm/s, 0.2 mm/s and 1.0 mm/s respectively. What would be the total percentage of particles removed if clarifier operates at a surface overflow rate (SOR) of 43.2 m /m . d?

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