Seasonal Effects on Generation of Particle-Associated Bacteria during Distribution
Publication: Journal of Environmental Engineering
Volume 122, Issue 12
Abstract
In four successive studies at Jefferson City, Mo., seasonal temperature change has been observed to result in major changes in water treatment plant microbiological efficiency. The present study (1989) was directed at estimating the relative numbers of particles of potential health significance transmitted through the Jefferson City water distribution system during cold and warm water periods. In addition, the contribution of aftergrowth to the number of particles generated or recruited during distribution was estimated. Seasonal variations in turbidity, coliform, heterotrophic plate count organisms, total bacteria, planktonic bacteria, and particle-associated bacteria were observed in finished water and distribution system samples. Direct microscopic counting was used to enumerate the total number of particles larger than 3 μm, as well as algal cells, long bacterial rods, activated carbon particles, and nematodes. All measurements confirmed the dominant effect of water temperature in influencing water treatment plant process efficiencies and the number of specific particles observed in the distributed drinking water. The results indicate that water treatment plant process efficiencies should be evaluated under low temperature conditions employing analytical techniques that are sufficiently sensitive to detect the impairment of removal of particles of potential health concern.
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References
1.
Alexander, L. J. (1994). “Control of iron and sulfur organisms by super-chlorination and de-chlorination.”J. AWWA, 36(Dec.), 1349.
2.
Brazos, B. J., O'Connor, J. T., and Abcouwer, S. (1985). “Kinetics of chlorine depletion and microbial growth in household plumbing systems.”Proc., AWWA WQTC, American Water Works Association, Denver, Colo.
3.
Brazos, B. J., O'Connor, J. T., and Lenau, C. W. (1986). “Seasonal effects on total bacterial removals in a rapid sand filtration plant.”Proc., AWWA WQTC, American Water Works Association, Denver, Colo.
4.
Brazos, B. J., and O'Connor, J. T. (1987). “Relative contributions of regrowth and aftergrowth to the number of bacteria in a drinking water distribution system.”Proc., AWWA WQTC, American Water Works Association, Denver, Colo.
5.
Brazos, B. J., and O'Connor, J. T. (1988). “Seasonal effects on removal of particle-associated bacteria in a rapid sand filtration plant.”Proc., AWWA WQTC, American Water Works Association, Denver, Colo.
6.
Cleasby et al. (1989). “Design and operation guidelines for optimization of the high-rate filtration process: plant survey results.”AWWA Res. Found. Rep., American Water Works Association, Denver, Colo.
7.
Guidance Manual for Compliance with the Surface Water Treatment Requirements for Public Water Systems. (1989). Criteria and Standards Div., Ofc. of Drinking Water, U.S. Environmental Protection Agency, Washington, D.C.
8.
LeChevallier, M. W., Hassenauer, T. S., Camper, A. K., and McFeters, G. A. (1984). “Disinfection of bacteria attached to granular activated carbon.”Appl. Environ. Microbiol., 48(July), 918–923.
9.
O'Connor, J. T., Brazos, B. J., Ford, W. C., Plaskett, J. L., and Dusenberg, L. L. (1985). “Chemical and microbiological evaluations of drinking water systems in Missouri: summer conditions.”Proc., AWWA Ann. Conf., American Water Works Association, Denver, Colo.
10.
O'Melia, C. R.(1985). “Particles, pretreatment and filtration.”J. Envir. Engrg., ASCE, 111(16), 874.
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Copyright © 1996 American Society of Civil Engineers.
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Published online: Dec 1, 1996
Published in print: Dec 1996
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