AWWA JAW64356

As surrogates for viruses, bacteria, and protozoa,fluorescent microspheres can be used to challengepathogen-removal technologies and determine theirefficacy in removing contaminants of interest. In addition,microspheres are helpful in quantifying flow patternsand mixing characteristics. However, the mostcommon microsphere enumeration method, directcount by fluorescence microscopy, requires skilledoperators and expensive equipment. In the researchdiscussed here, a prototype device that used laser scanningcytometry and that was constructed of relativelyinexpensive components performed at least as well asthe microscope for the range of ~5-200 µS/mm².Among the many challenges facing water providerstoday are increasingly stringent regulations and thethreat of intentional contamination of water sourceswith pathogens. A device such as the prototypedescribed here would offer utility managers a way totest their water supply technologies with more accuracyand precision. It represents a building block towardmore advanced (but still low-cost) technologies thatcan detect pathogens and help reduce risks. Includes 7 references, figures.

Product Details

Edition:

Vol. 99 - No. 3

Published:

03/01/2007

Number of Pages:

8

File Size:

1 file , 620 KB