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Chapter 82 : Monochloramine Disinfection of Biofilm-Associated in a Potable Water Model System

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Monochloramine Disinfection of Biofilm-Associated in a Potable Water Model System, Page 1 of 2

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Abstract:

This chapter aims at determining the susceptibility of biofilm-associated to free chlorine and monochloramine. A biofilm reactor was developed to grow biofilms containing on 24 replicate stainless-steel surfaces in potable water. The ability of this reactor to produce reproducible biofilms was validated by the fact that the standard deviations of the base biofilm densities on stainless-steel coupons (n = 3) ranged from 0.06 to 0.18 log CFU per coupon. When containing biofilms were exposed to the same dosages of monochloramine for identical contact periods, the treatments were significantly more effective. In summary, the authors have shown that biofilm-associated are significantly less susceptible to chlorine than are planktonic , while susceptibility of planktonic and biofilm-associated to monochloramine are similar. When monochloramine and free chlorine were compared under identical conditions, monochloramine was significantly more effective, indicating that monochloramine may be an effective disinfectant for the inactivation of within potable water distribution systems. Further research using open system biofilm reactors and model distribution systems is needed to determine the utility of monochloramine as a disinfectant against biofilm-associated .

Citation: Donlan R, Murga R, Carpenter J, Brown E, Besser R, Fields B. 2002. Monochloramine Disinfection of Biofilm-Associated in a Potable Water Model System, p 406-410. In Marre R, Abu Kwaik Y, Bartlett C, Cianciotto N, Fields B, Frosch M, Hacker J, Lück P (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555817985.ch82

Key Concept Ranking

Legionella pneumophila
0.61696714
Klebsiella pneumoniae
0.5689655
0.61696714
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Figures

Image of FIGURE 1
FIGURE 1

Potable water biofilm reactor.

Citation: Donlan R, Murga R, Carpenter J, Brown E, Besser R, Fields B. 2002. Monochloramine Disinfection of Biofilm-Associated in a Potable Water Model System, p 406-410. In Marre R, Abu Kwaik Y, Bartlett C, Cianciotto N, Fields B, Frosch M, Hacker J, Lück P (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555817985.ch82
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Image of FIGURE 2
FIGURE 2

Biofilm-associated disinfection with free chlorine.

Citation: Donlan R, Murga R, Carpenter J, Brown E, Besser R, Fields B. 2002. Monochloramine Disinfection of Biofilm-Associated in a Potable Water Model System, p 406-410. In Marre R, Abu Kwaik Y, Bartlett C, Cianciotto N, Fields B, Frosch M, Hacker J, Lück P (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555817985.ch82
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Image of FIGURE 3
FIGURE 3

Biofilm-associated disinfection with monochloramine.

Citation: Donlan R, Murga R, Carpenter J, Brown E, Besser R, Fields B. 2002. Monochloramine Disinfection of Biofilm-Associated in a Potable Water Model System, p 406-410. In Marre R, Abu Kwaik Y, Bartlett C, Cianciotto N, Fields B, Frosch M, Hacker J, Lück P (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555817985.ch82
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Image of FIGURE 4
FIGURE 4

Comparison of free chlorine and monochloramine disinfection efficacy of biofilm-associated Error bars represent standard deviations ( = 3).

Citation: Donlan R, Murga R, Carpenter J, Brown E, Besser R, Fields B. 2002. Monochloramine Disinfection of Biofilm-Associated in a Potable Water Model System, p 406-410. In Marre R, Abu Kwaik Y, Bartlett C, Cianciotto N, Fields B, Frosch M, Hacker J, Lück P (ed), . ASM Press, Washington, DC. doi: 10.1128/9781555817985.ch82
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Download as Powerpoint

References

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1. Cunliffe, D. A. 1990. Inactivation of Legionella pneumophila by monochloramine. J, Appl. Bacteriol. 68:453459.
2. Donlan, R. M. 2000. Role of biofilms in antimicrobial resistance. Am. Soc. Artif. Intern. Organs 46:S47S52.
3. Donlan, R. M.,, W. O. Pipes,, and T. L. Yohe. 1994. Biofilm formation on cast iron substrata in water distribution systems. Water Res. 28:14971503.
4. Kool, J. L.,, J. C. Carpenter,, and B. S. Fields. 1999. Effect of monochloramine disinfection of municipal drinking water on risk of nosocomial Legionnaires' disease. Lancet 353:272277.
5. LeChevallier, M. W.,, C. D. Cawthon,, and R. G. Lee. 1988. Inactivation of biofilm bacteria. Appl. Environ. Microbiol. 54:24922499.
6. LeChevallier, M. W.,, C. D. Lowry,, and R. G. Lee. 1990. Disinfecting biofilms in a model distribution system. J. Am. Water Works Assoc. 87:99.
7. Tilt, N.,, and M. A. Hamilton. 1999. Repeatability and reproducibility of germicide tests: a literature review. J. AOAC Int. 82:384389.
8. Wright, J. B., 2000. Legionella biofilms: their implications, study, and control, p. 291310. In L. V. Evans (ed.), Biofilms: Recent Advances in Their Study and Control. Harwood Academic Publishers, Amsterdam, The Netherlands. 82:384389.

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