2. Calculate the diameter of a thickener having a circular basin which is to be used to treat a 0.2m3/s of a slurry containing 20m diameter particles of silica (density 2600kg/m3 ) suspended in water (density 1000 kg/m3, viscosity 0.001Ns/m2 ) at a concentration of 650kg/m3. Batch settling test data for the slurry is not available. However, you may assume that the calculation may be performed using the Richardson and Zaki equation: Vp=Vt(1Cv)4.6 Where Cv is the volume fraction of solids. Take the concentration of solids in the underflow as 1560kg/m3 and also calculate the underflow volumetric flow rate assuming total separation of all solids. Hint: Calculate Vp, assume values of Cv from 0 to 1.0, Calculate C, then calculate Vp and finally Gs. Then prepare the Kynch plot. Comber C=pCv V1=3.488104m/sA=1268m2D=40.2mQu=0.083m3/s