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The drinking water treatment plant is typically upgraded in terms of both water quantity (flow rate)...

The drinking water treatment plant is typically upgraded in terms of both water quantity (flow rate) and quality (conversion). At present, 90% of a contaminant A is degraded by a first-order reaction in a single CSTR treating source water. We plan to add an identical reactor having the same volume to the existing one in series in order to improve the performance of current treatment plant.

(a) For the same flow rate as presently used, how will this addition affect the removal of contaminant A?

(b) If the same 90% conversion is acceptable (CSTR in series) and thus kept, how much can the flow rate be increased by this addition?

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