A settling column analysis is performed on a dilute suspension of particles from water. The suspension exhibited discrete particle settling characteristics. Data collected from samples taken at a depth of 1.5 meters are as follows:Time required to settle 1.5 m (min)0.61.22.24.568.8Fraction of Particles Settled0.30.450.60.70.850.96 Plot the velocity distribution for the suspensionFind the overflow rate (Q/A) for a settling tank that will give at least 75% removal.If the flowrate into the settling tank in part b. is 850 m3/hr, please give the dimensions of you settling tank?Since you will need to address the smaller particles that have passed through this system at some later point, what is the particle size distribution (mass fraction vs. diameter) if we assume the particle density is that of sand (sg = 2.65)

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Engineering

Civil Engineering

the velocity distribution for the suspension

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.1CTP

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Concept explainers

Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.

Question

A settling column analysis is performed on a dilute suspension of particles from water. The suspension exhibited discrete particle settling characteristics. Data collected from samples taken at a depth of 1.5 meters are as follows:

Time required to settle 1.5 m (min)	0.6	1.2	2.2	4.5	6	8.8
Fraction of Particles Settled	0.3	0.45	0.6	0.7	0.85	0.96

Plot the velocity distribution for the suspension
Find the overflow rate (Q/A) for a settling tank that will give at least 75% removal.
If the flowrate into the settling tank in part b. is 850 m3/hr, please give the dimensions of you settling tank?
Since you will need to address the smaller particles that have passed through this system at some later point, what is the particle size distribution (mass fraction vs. diameter) if we assume the particle density is that of sand (sg = 2.65)

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