$($e$)$ Compute the $N$ and $P$ at $20C.$

$64.$ Develop a relationship between the $N{H}_3-\frac{N}{B}OD$ ratio and the acrobic volume percentage for a nitrification$-$denitrification channel. Consider a BOD of $200m\frac{g}{?}$ and a range of $N{H}_3-N$ of $10$ to $70m\frac{g}{?}.$ Compute the oxygen requirements for each case.

$188$ notseital

Use the following parameters:

$R_x=$ half the maximum rate

VSS day$)$ at $20C$

$x_c=3000m\frac{g}{1}$

$a^{\text{'}}=0\mathrm{.}55$

$K_{\text{g}\text{o}\text{b}\text{.}\text{m}\text{e}\text{m}\text{a}\text{t}\text{i}\text{s}}=8\mathrm{.}0/$day at $20C$

$BO\frac{D}{N}{O}_3-N=3\mathrm{.}0$

$a=0\mathrm{.}5$

$b=\frac{0\mathrm{.}1}{?}$ day

$x_2=0\mathrm{.}45$

$S_e=10m\frac{g}{l}$