AWWA JAW58477

It is a common practice for utility managers to determine theorganic matrix of water by measuring the dissolved organiccarbon (DOC) or total organic carbon concentrations andregulating water quality by fixing acceptable thresholds. Althoughthis quantitative approach is generally satisfactory, problemsappear during periods of algal proliferation or heavy rainfall,when the water's biodegradable organic fraction may increasedramatically. This study was specifically designed to provideanswers about coliform occurrence during these seasonal events.The results confirm the important effect of the origin ofdissolved organic matter on the microbiological stability in low-nutritivewaters, including drinking water, diluted river waterafter a heavy rainfall, and diluted algal bloom water. Further,the results indicate that low-nutritive waters with equivalentDOC concentrations conveying organic matter from differentorigins, and likely to partially pass through the treatment step,allowed the temporary maintenance of the culturability of somecoliform bacteria. Includes 36 references, tables, figures.

Product Details

Edition:

Vol. 95 - No. 8

Published:

08/01/2003

Number of Pages:

8

File Size:

1 file , 230 KB