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Let’s consider a portable UV disinfection system to be used with 5-gallon (18.9 L) coolers with...

Let’s consider a portable UV disinfection system to be used with 5-gallon (18.9 L) coolers with a modified lid. The setup will allow water to flow into the top and out a spigot at the bottom. The resulting contactor is effectively a CSTR.

  1. If the disinfection rate constant for UV278 is 6.3 s-1 for E. coli, what is the maximum flow rate that the system can handle to achieve 99 percent inactivation? (answer in L/min)
  1. If you decide to operate the device in batches instead of in a flow-through mode, how long should you wait to achieve 4-log inactivation of E. coli? (answer in min)

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Amanda K answered 6 months ago
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