Explain theoretical hydraulic retention time of the reactor

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Reference no: EM13507547

A completely mixed reactor (CSTR, CMFR) is to be used to treat an industrial wastewater.

(a) A tracer study is conducted to determine the true hydraulic residence time of the reactor. A slug of tracer (NaBr) is added to the reactor and allowed to wash out over time. The flow to the reactor is 10,000 L/d and the reactor volume is 40,000 L. The tracer data are given below. Using our mass-balance approach, determine the true hydraulic residence time of the reactor.

time (day) tracer concentration (mg/L) time (day) tracer concentration (mg/L)
0 50 6 2.5
1 30 7 1.5
2 18 8 0.9
3 11 9 0.6
4 6.8 10 0.3
5 4.1

(b) If the pollutant to be removed has a concentration of 100 mg/L and decays by 1st-order kinetics with a rate coefficient of 2.25 d-1, what percent removal is achieved if one uses the theoretical hydraulic retention time of the reactor?

Reference no: EM13507547

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