Q Design contineow forw completely $-$ mixed activated sludge process to yeild effelvent $BO{D}_s=20mglC$ and suspended solids $=23m\frac{g}{L}$

Primary classification $=200m\frac{g}{L}=20$

$=0\mathrm{.}2\frac{m^3}{s},Y=0\mathrm{.}65MLVSS=3000m\frac{g}{L}(N)$

$K_d=0\mathrm{.}05,{}_c=10$ days.

Retum sludge concentration $=15000m\frac{g}{L}$ of rupended solho, MLVSS ratio $=0\mathrm{.}8.$

Defermination of concentration of soluble BODs in effluent.

BODS $of$ effluent $=0\mathrm{.}63(SS)$