Provide PDF Format
AWWA WQTC71367
- Validation of UV Disinfection Systems for Recalcitrant Microorganisms Using Lagrangian Actinometry
- Conference Proceeding by American Water Works Association, 11/01/2009
- Publisher: AWWA
$12.00$24.00
In this research, both Lagrangian actinometry (LA) and biodosimetry were employed toevaluate reactor performance and assess reactor credit for inactivation of recalcitrantmicroorganisms (i.e., nominal ultraviolet (UV) doses in the 200-400 mJ/cm<sup>2</sup> range). A 3-LPHO-lampreactor was validated by LA and biodosimetry at the Gloversville - Johnstown JointWastewater Treatment Facility in New York. Three different sizes of dyed microspheres (DMS) (6,10 and 15 mm) and spores of a native strain of Bacillus pumilus were employed in the test.These challenge particles were imposed on the reactor at four different flow rates from 25 to200 GPM. At higher flow rates, the results of LA and biodosimetry agreed well with eachother. At lower flow rates, the results were more variable. At the lowest flow rate, 25 GPM, abroad dose distribution from approximately 100 to 500 mJ/cm<sup>2</sup> was characterized. The resultsof these experiments also indicated that LA appears to be sufficiently sensitive andresponsive to quantify unsteady behavior in reactor performance. When operated at thelowest flow rate, the behavior of the 3-lamp reactor became unsteady. Replicate microspheresamples illustrated the magnitude of this unsteadiness and its implications with respect toreactor performance. Includes 3 references, tables, figures.
Related Products
AWWA WQTC52982
The History of the Negotiated Rulemakings--What a Long, Strange Road It's Been..
$12.00 $24.00
AWWA CSC94024
Automated Demand Allocating, Updating and Forecasting Through Integration of GIS, Distribution Syst..
$12.00 $24.00
