Question

Q3) [15 points] Design a horizontal flow rectangular sedimentation basin for a maximum flowrate of 43,200 m3/d. Assume an overflow rate of 40 m3/d.m2 and a water temperature of 12 °C. Provide the following in your summary of the design: Qdesign; Number of tanks; Width of each tank; Length of each tank; Side water depth; Depth of sludge zone; L:D; vf; Reynolds number; Froude Number; Number of Launders; Launder Length; Wier Loading; Type of sludge collector.

Answer 1

Solution Given cata design flowrake (a)43,2c0 m/ dischage (Q) с 43,2007% Surface avea design 43200 provick o sedimentation tank Assume e L 532 Appvaximate Maintain flow through velocity (Vo)-o3 Detention timeアーーー 14 53.2 0 3

volu me flow vate 53.220.3XH Detenbion time 132.00 오녀 53 2 x 203 800 Depth of wates .93m provide vee board o m Assume sludgebe depthaIm total dlepth 3405u 108m tI.532 lo-8 Reyods numbey Li x20 3 x 108 (90 3+108)

36)4 38 nolds umbes c 58232 G Approx mately kine uobic viscosity of "ates % (13200m3la 20 3 237 CKoSs collectovs fox Sudlg of ant is Collection becauute tergth qreakes than 18fe