For the wastewater sample characterization parameters are given: TSS $220$ mg$/$L$,$ VSS $200$ mg$/$L$,$ BOD

$200$ mg$/$L$,$ rbCOD $100$ mg$/$L$,$ TCOD $500$ mg$/$L$,$ sCOD $160$ mg$/$L$.$ Determine $($a$)$ the biodegradable COD

concentration, $($b$)$ the slowly biodegradable COD concentration, $($c$)$ the non$-$biodegradable volatile

suspended solids $($nbVSS$)$ concentration, and $($d$)$ the inert Total suspended solids $($iTSS$)$ concentration.

Assume that the bCOD$/$BOD ratio equals $1\mathrm{.}6$ and the activated sludge treatment effluent sCOD equals

$30\mathrm{.}0$ mg$/$L$.$