Problem $12$: A treatment plant processes $10$ MGD of wastewater with $240m\frac{g}{L}$ BOD and $225$

$m\frac{g}{L}$ suspended solid $($SS$).$ The discharge from the final clarifier contains $15m\frac{g}{L}$BOD and $20$

$m\frac{g}{L}$ SS$.$ Primary clarifier removes $60\%$ of the suspended solids and $35\%$ BOD. However, BOD

reduction does not contribute to the primary sludge production. The primary sludge has a sp$.$

gravity of $1\mathrm{.}02$ and solids content $6\%.$ The cell yield $($conversion of BOD reduction to biological

solids$)$ is $65\%.$ Calculate the volume of solid $(f{t}^3)$ from primary sludge.

$($A$)95$

$($B$)101$

$($C$)107$

$($D$)122$