Solution :
The treatment system will operate as the well mixed chamber.
Disinfection rate constant for the UV light, k is 7.80 /s. Number of bacteria in water need to be reduced by 99.9%
Percent reduction of bacteria should be
Volume of the unit chamber is fixed at 2L
Assume the inlet concentration, as 1000
The outlet concentration of bacteria, C should be
= 103
The well mixed chamber will then follow a completely mixed flow reactor model.
Compute the time required :
= 1.115 s
Flow through the system is = 1.79 L/s
The amount of water treated during the 10 hours of sunlight is 1.79 x 10 x 60 x 60 = 64440 L