AWWA WSC67787

This powerpoint presentation presents research sponsored by the U.S. Environmental Protection Agency (USEPA) on water qualitysensor response to contamination. Two knowledge gaps have been identified, and include:detection of biological suspensions below 104-105cfu/ml; and,detection of radiological contaminants in water.This research summarizes results for biological testing, in particular rad sensor testing that is ongoing. Experimental design at the Test and EvaluationFacility is provided, along withsensor response results to B. globigii spores andE. coli. Discussion of results includes:all of the sensors produced some response at higherconcentrations, better than typical turbidimeters;the multiple angle light scattering technology produceda visual response at 1000 and 600 cfu/ml;baseline for these tests was very stable,whether these are meaningful responses for the fielddepends partly on baseline noise; responses were difficult to see at 1000 cfu/ml andbelow, but event detection software may help detectanomalies;the data shows what one might observe with thesesensors in place; and,there is a need for more online sensors that candetect at low concentrations in the field. Includes tables.

Product Details

Edition:

Vol. - No.

Published:

04/01/2008

Number of Pages:

23

File Size:

1 file , 1.2 MB