suspensions

Details

• Alternative Title:
  J Photochem Photobiol B
• Personal Author:
  Martin, Stephen B. ; Schauer, Elizabeth S. ; Blum, David H. ; Kremer, Paul A. ; Bahnfleth, William P. ; Freihaut, James D.
• Description:
  We developed, characterized, and tested a new dual-collimation aqueous UV reactor to improve the accuracy and consistency of aqueous k-value determinations. This new system is unique because it collimates UV energy from a single lamp in two opposite directions. The design provides two distinct advantages over traditional single-collimation systems: 1) real-time UV dose (fluence) determination; and 2) simple actinometric determination of a reactor factor that relates measured irradiance levels to actual irradiance levels experienced by the microbial suspension. This reactor factor replaces three of the four typical correction factors required for single-collimation reactors. Using this dual-collimation reactor, Bacillus subtilis spores demonstrated inactivation following the classic multi-hit model with k=0.1471cm(2)/mJ (with 95% confidence bounds of 0.1426 to 0.1516).
• Subjects:
  • Bacillus subtilis
  • Spores, Bacterial
  • Ultraviolet Rays
  • Water Purification
• Source:
  J Photochem Photobiol B. 162:674-680.
• Pubmed ID:
  27498232
• Pubmed Central ID:
  PMC5362826
• Document Type:
  Journal Article
• Funding:
  CC999999/Intramural CDC HHS/United States
• Volume:
  162
• Download URL:
  https://stacks.cdc.gov/view/cdc/44757/cdc_44757_DS1.pdf
• File Type:
  [PDF - 2.03 MB]
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:d4bf5559da3a76afd1fd030604f4c700da0f9a7d0cf18942a0278562aec15432