An aerated activated sludge tank is being operated under following conditions: $Q=4400$

$\frac{m^3}{d},$ MLSS $=3500m\frac{g}{l},Y=0\mathrm{.}5,$ tank volume $=770m^3,$ Endogeneous decay rate constant

$\frac{k_d}{b}ar(f)0\mathrm{.}09d^{-1}.$

Estimate weight of solids produced per day for the conditions in which BOD is

reduced from $350m\frac{g}{?}$ to $130m\frac{g}{l}.$

b$.$ Estimate ${}_c.$

$($e$.$ Estimate $\frac{F}{M}$ ratio.