Determine the number of completely mixed chlorine contact chambers each having a detention time of 30 min that would be required in a series arrangement to reduce the bacterial count of a treated effluent from 10 to 14.5 organisms/mL if the first-order removal rate constant is equal to 6.1 h'. If a plug-flow chlorine contact chamber were ised with the same detention time as the series of completely mixed chambers, what would the bacterial count be after reatment? Solve the problem using both the mass balance equations and Figure 6.5.
Determine the number of completely mixed chlorine contact chambers each having a detention time of 30 min that would be required in a series arrangement to reduce the bacterial count of a treated effluent from 10 to 14.5 organisms/mL if the first-order removal rate constant is equal to 6.1 h'. If a plug-flow chlorine contact chamber were ised with the same detention time as the series of completely mixed chambers, what would the bacterial count be after reatment? Solve the problem using both the mass balance equations and Figure 6.5.
Chapter2: Loads On Structures
Section: Chapter Questions
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Transcribed Image Text:2. Determine the number of completely mixed chlorine contact chambers each having a detention time of 30 min that
would be required in a series arrangement to reduce the bacterial count of a treated effluent from 10 to 14.5
organisms/mL if the first-order removal rate constant is equal to 6.1 h'. If a plug-flow chlorine contact chamber were
used with the same detention time as the series of completely mixed chambers, what would the bacterial count be after
treatment? Solve the problem using both the mass balance equations and Figure 6.5.
3. Initially, a plug-flow with recycle of product (R = 2) produces 90% conversion of a liquid feed with Co = 10 mol/L. If
the recycle is shut off, by how much will this lower the processing rate of the feed in order to keep conversion at the
same 90%? What would be the change if R is increased to 3 instead?
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