$(25$ points$)$ The design flow for a water treatment plant is $1MGD(3\mathrm{.}8{10}^3\frac{m^3}{d}).$ The rapid

mixing tank will have a mechanical mixer and the average alum dosage will be $35m\frac{g}{L}.$ The

theoretical mean hydraulic detention time of the tank will be $2$ minutes. Determine the following:

$Q=3\mathrm{.}31x^3+\frac{2}{2}$

a$.$ The quantity of alum needed on a daily basis in $k\frac{g}{d},$

CSTR

$\{\begin{array}{c}\text{:}3\mathrm{.}5{10}^{-2}\frac{17}{2}\end{array}$

b$.$ The dimensions of the tank in meters for a tank with equal length, width, and

depth,

$])$:$\}$

$[,1440$min,

c$.$ The power input required for a G of $1,000se{c}^{-1}$ for a water temperature of $10C-$

express the answer in kW