Details:

Alternative Title:
J Photochem Photobiol B
Publisher's site:
http://dx.doi.org/10.1016/j.jphotobiol.2016.07.028
Personal Author:
Martin, Stephen B.; Schauer, Elizabeth S.; Blum, David H.; Kremer, Paul A.; Bahnfleth, William P.; ... More +
Martin, Stephen B.; Schauer, Elizabeth S.; Blum, David H.; Kremer, Paul A.; Bahnfleth, William P.; Freihaut, James D.; Less -
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).
Subject:
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Article
Bacillus Subtilis
Collimated-beam Reactor
Germicidal
Inactivation Rate Constant
K-Value
Spores, Bacterial
Ultraviolet
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;
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:d4bf5559da3a76afd1fd030604f4c700da0f9a7d0cf18942a0278562aec15432
File Type:

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