A monomedia anthracite filter is designed with the following specifications: effective size 1.1 mm, uniformity coefficient 1.4, and density 1650 kg/m³. Calculate the backwash rate required to get 25 percent bed expansion at the design summer temperature of 22 C (p = 998.7 kg/m³, μ = 9.55 x 10-4 kg/m-s). Use the midpoint Ergun parameters for anthracite: ky= 228, k;= 4.4, EF = 50%.

A monomedia anthracite filter is designed with the following specifications: effective size 1.1 mm, uniformity coefficient 1.4, and density 1650 kg/m³. Calculate the backwash rate required to get 25 percent bed expansion at the design summer temperature of 22 C (p = 998.7 kg/m³, μ = 9.55 x 10-4 kg/m-s). Use the midpoint Ergun parameters for anthracite: ky= 228, k;= 4.4, EF = 50%.

Structural Analysis

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ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A monomedia anthracite filter is designed with the following specifications: effective size 1.1 mm,
uniformity coefficient 1.4, and density 1650 kg/m³. Calculate the backwash rate required to get 25
percent bed expansion at the design summer temperature of 22 C (p = 998.7 kg/m³, u = 9.55 x 10-4
kg/m-s). Use the midpoint Ergun parameters for anthracite: ky = 228, ki = 4.4, EF = 50%.

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