A conventional complete mix activated sludge treatment process is to be used to treat $0\mathrm{.}3$ m$3/$s of wastewater with initial $($BOD$)5($So$)$ of $300$ mg$/$L$.$ Assume the following conditions are applicable:

$1-$ Se $=10$ mg$/$L

$2-$ Yield coefficient Y $=0\mathrm{.}6,$ decay coefficient Kd $=0\mathrm{.}08$ d$-1$

$3-$ Mean cell residence time $\backslash$theta c $=8$ days

$4-$ Converting $($BOD$)$L to $($BOD$)5$ factor f$=0\mathrm{.}7$

$5-$Mixed liquor volatile suspended solid $=3000$ mg $/$L$.$

$6-$ Aeration efficiency $=10\%$

Calculate the following:

$1-$ Reactor volume.

$2-$ Organic loading $($F$/$M ratio$)$ and volumetric loading.

$3-$ Oxygen required

$4-$ Air required

$5-$ Check the air required per BOD removal.