Problem

The number of coliform bacteria is reduced from an initial concentration of 2,000,000 per...

The number of coliform bacteria is reduced from an initial concentration of 2,000,000 per 100 ml to 400 per 100 ml in a long, narrow chlorination tank under a steady wastewater flow with a hydraulic detention time of 30 min. Assuming first-order kinetics and ideal plug flow, calculate the reaction-rate constant. Using this rate constant, find the effluent concentration if the reactor is operated as a completely mixed reactor.

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