Influence of geometrical parameters in different irradiation vessels on UV disinfection rate.
Possible differences in the disinfection rate of two irradiation concepts, e.g. irradiation in cuvettes and petri dishes, were examined and quantified on a UV laboratory irradiation plant unit. In addition the geometrical parameters of the irradiation vessels and mixing of the bacterial suspension during UV irradiation were considered. The results showed differences in disinfection rates of more than 2 log between different sample areas in the vessels. The mixing caused an improvement of the disinfection rates in unfavourable irradiation areas of the cuvettes and in contrast a deterioration in all irradiation areas in the petri dishes.
Schoenen
D
D
Hygiene-Institut, Universität Bonn.
Kolch
A
A
Gebel
J
J
D004203:Disinfection; D004926:Escherichia coli / Q000528:radiation effects*; D014466:Ultraviolet Rays