Example A rectangular sedimentation tank with W=25m, L=50m and h-3m. The flow rate 1500 m/h, and the influent particles concentration 2000mg/l. The following table shows the percentage of particles as a function of his diameter: Volume of particle (mm) 0.001 % 10 0.005 20 0.01 15 0.015 15 0.02 20 0.025 20
Example A rectangular sedimentation tank with W=25m, L=50m and h-3m. The flow rate 1500 m/h, and the influent particles concentration 2000mg/l. The following table shows the percentage of particles as a function of his diameter: Volume of particle (mm) 0.001 % 10 0.005 20 0.01 15 0.015 15 0.02 20 0.025 20
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter2: Origin Of Soil And Grain Size
Section: Chapter Questions
Problem 2.14P: A hydrometer test has the following result: Gs = 2.65, temperature of water = 26 C, and L = 10.4 cm...
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![Example
A rectangular sedimentation tank with W=25m, L=50m and h=3m. The flow
rate = 1500 m'/h, and the influent particles concentration 2000mg/l. The
following table shows the percentage of particles as a function of his diameter:
Volume of particle (mm)
0.001
%
10
0.005
20
0.01
15
0.015
15
0.02
20
0.025
20
Find:
1) Settling velocity, if particles density 2650 kg/ m' and viscosity of water
= 1.002*10 N.s/m²
2) Percentage removal for each particle and total percentage removal
3) Sludge depth, if the tank is cleaned one time per month. If percentage of
solide = 8% and sludge density = 1150 kg/ m'
4) Effluent concentration particles](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4caa14f5-53be-43c3-90ea-cfa94a358e94%2F57ce8907-a0fa-4541-99e6-c6d5300b1d1e%2Fp5oddzk_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Example
A rectangular sedimentation tank with W=25m, L=50m and h=3m. The flow
rate = 1500 m'/h, and the influent particles concentration 2000mg/l. The
following table shows the percentage of particles as a function of his diameter:
Volume of particle (mm)
0.001
%
10
0.005
20
0.01
15
0.015
15
0.02
20
0.025
20
Find:
1) Settling velocity, if particles density 2650 kg/ m' and viscosity of water
= 1.002*10 N.s/m²
2) Percentage removal for each particle and total percentage removal
3) Sludge depth, if the tank is cleaned one time per month. If percentage of
solide = 8% and sludge density = 1150 kg/ m'
4) Effluent concentration particles
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