The concentration of a pollutant in wastewater must be reduced by 90% before it can be discharged to a river. The flow rate is 500 m3/d.
a) What volume of a plug flow rector is required to remove 90% of pollutant that decays according to a rate constant of 0.02 hr-1?
b) Compare the total reactor volume required for 90% removal of the same pollutant in a CSTR system that contains a single reactor against a system that contains three CSTR reactors of equal volume in series.