Consider a back$-$mix reactor which has a square plan view that is $7$ feet by $7$ feet, has a water depth of$85$

feet, and a freeboard of $2\mathrm{.}5$ feet. The detention time in the reactor is $45$ seconds. The power of the miver

motor is $25$ horsepower. The temperature of the water is $40F.$ The efficiency of the mixing is $65\%$ and the

efficiency of the electric motor is $85\%.$

a$)$ Determine input power from the mixer into the water in horsepower $($hp$).$

b$)$ Determine input power from the mixer into the water in $lbf-f\frac{t}{s}.$

c$)$ Determine the volume of water $AA$ in the reactor in cubic feet $(f{t}^3).$

d$)$ Determine the flow $Q$ through the reactor in cubic feet per second $($cfs$).$

e$)$ Determine the flow $Q$ through the reactor in million gallons per day $($mgd$).(40F$ Dyray

f$)$ Determine the velocity gradient $G$ in $se{c}^{-1}$

Input power from mixer into water $=$

a$)$

hp

Input power from mixer into water $=$

lbf$-$ft$/$s

$P=25hp$

Volume of water $AA$ in the reactor $=$

Flow $Q=$

cfs

Flow $Q=$

mgd

Velocity gradient $G=$

$se{c}^{-1}$