4. Calculate the head loss for a 3-m deep bed filter at a filter loading of 10 m/h and a temperature of 20 C (u/p=1*10-6 m/s). Please use the Blake-Kozeny equation to solve the water head loss for individual filter layers that has the following properties: Sphericity (Y) deq (mm) Grain density (ps), kg/m3 Bed porosity (8) Sand 2650 0.5 0.75 0.3 Anthracite coal 1500 0.55 0.5 1 (kz)(u)(1 ) h D (9). FE (6-50) Troughs Anthracite Coal h = head loss in depth of bed D, m = acceleration of gravity, m/s9.8 m/s2 av = grain surface area per unit of grain volume (i.e., specific surface S, = 6/d for spheres and 6/ deq for irregular grains), deq is the grain diameter of a sphere of equal volume, m/ mor m = sphericity = dynamic viscosity of the fluid, Pas p = mass density of the fluid, kg/m k = dimensionless Kozeny constant, commonly found to be close to 5 under most filtration conditions (Fair et al., 1968) y = applied water velocity, or loading rate, m/s. m or m/s 2 m Sand 1 m 4. Calculate the head loss for a 3-m deep bed filter at a filter loading of 10 m/h and a temperature of 20 C (u/p=1x10-6 m/s). Please use the Blake-Kozeny equation to solve the water head loss for individual filter layers that has the following properties: Grain density Sphericity (9) deq (mm) Bed porosity (8) (ps), kg/m3 Sand 2650 0.5 0.75 0.3 Anthracite coal 1500 0.55 0.5