You have been asked to design a steady state treatment device similar to a continuously mixed reactor to treat toluene in an aqueous waste stream. The flow into the system is $1$ m$3/$hr and the toluene concentration is $10$ ppm$.$ The system utilizes a particular type of bacteria that can consume toluene following a first order reaction. The rate constant is $0\mathrm{.}1$ day$-1.$ If the reactor must treat to an effluent concentration of $1$ ppm$,$ how big should it be $($Volume$)?$