A completely mixed activated sludge process is used for both BOD removal and

nitrification with a flow rate of $22,464$ MLD$.$ Additional data provided in the following table.

$($a$)$ design to accomplish a BOD removal and nitrification with effluent $N{H}_4^{+}-N$ concentration

of $0\mathrm{.}5m\frac{g}{L}$ and BODe & TSSe $15m\frac{g}{L}.($b$)$ determine design SRT$,$ sludge production, HRT$,$

OLR, and observed yield, $($c$)$ Oxygen requirement $(k\frac{g}{h}r),($d$)$ determine alkalinity requirement

to maintain $pH7-8$ in $k\frac{g}{d}($if alkalinity is added in the form of $NaHC{O}_3).$ The aeration basin

mixed liquor temperature is $12C.$ Consider all the biokinetic parameters based on $12C$

temperature.