Evaluation of the Performance of Iodine-Treated Biocide Filters Challenged with Bacterial Spores and Viruses
Final technical rept.
FLORIDA UNIV GAINESVILLE DEPT OF ENVIRONMENTAL ENGINEERING SCIENCES
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Filter media coated with a cationic resin in triiodide form were challenged by Bacillus subtilis spores and MS2 bacteriophage aerosols delivered from a Collison nebulizer through air at 35 RH and 23 C at 14.2 cms face velocity. Bacteria were classified and collected in a 6-stage Andersen impactor serially connected AGI-30 impingers were used in phage experiments. Average bacterial removal efficiency was 99.9991 for untreated UM and 99.9994 for treated media TM viral removal was 92 for UM and 94 for TM. Microbes collected on filters were extracted into water using a vortex mixer. After correction for effects of extracted iodine, 0.25 of bacteria survived on UM and 0.069 on TM, while 4.2 of phages survived on UM and 2.2 on TM. Increasing concentrations of virus in the nebulizer showed no clear effect from agglomeration.
- Chemical, Biological and Radiological Warfare