Problem $4$:

Design a UASB reactor for the treatment of dairy wastewater at $35C.$ The wastewater flow rate is $1300\frac{m^3}{d}$ with a soluble COD concentration of $2400m\frac{g}{L}.$ Also, calculate the effluent soluble COD concentration and the reactor efficiency. The following parameters are given:

$SRT=60d$

Sludge blanket occupies $82\%$ of the liquid volume

Height for gas collection $=2\mathrm{.}7m$

Upflow velocity $=1\mathrm{.}5\frac{m}{h}$

Design organic loading rate $=10$kgsCO$\frac{D}{m^3}*d$

$Y=0\mathrm{.}068kgVS\frac{S}{k}g$ COD

$k_d=0\mathrm{.}05d^{-1}$

${}_{\text{m}\text{a}\text{x}}=0\mathrm{.}32d^{-1}$

$K_s=140mgsCO{D}^{-1}L$