Water contains 7.0 mg/L of soluble ion (Fe2+) that is to be oxidized by aeration
ID: 898745 • Letter: W
Question
Water contains 7.0 mg/L of soluble ion (Fe2+) that is to be oxidized by aeration to a concentration of 0.25 mg/L. The pH of the water is 6.0 and temperature is 12oC. Assume the dissolved oxygen in the water is in equilibrium with the surrounding atmosphere. Laboratory results indicate the pseudo first-order rate constant for oxygenation of Fe2+ is 0.175/min. Assuming steady-state operations and a flow rate of 40,000 m3/d, calculate the minimum detention time and reactor volume necessary for oxidation of Fe2+ to Fe3+. Perform the calculations for both a CMFR and PFR.
answer CMFR: V= 4286m^3, t= 2.6hr and PFR V=528m^3, t= 19min
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Water contains 7.0 mg/L of soluble ion (Fe2+) that is to be oxidized by aeration
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