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Applied and Environmental Microbiology, November 2001, p. 5303-5307, Vol. 67, No. 11
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.11.5303-5307.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Chlorine-Susceptible and Chlorine-Resistant Type 021N Bacteria Occurring in Bulking Activated Sludges

M. A. Séka,1 Y. Kalogo,2 F. Hammes,1 J. Kielemoes,1 and W. Verstraete1,*

Laboratory for Microbial Ecology and Technology, Center for Environmental Sanitation, Ghent University, 9000 Ghent,1 and Laboratoire d'Epuration des Eaux, FUSAGx, 5030 Gembloux,2 Belgium

Received 12 March 2001/Accepted 27 June 2001

Two filamentous bacteria causing bulking in two activated sludges were examined. Investigations using morphological features, staining techniques, and fluorescent in situ hybridization identified both filaments as type 021N. However, an examination of the effect of chlorine on the sludges revealed a chlorine-susceptible type 021N in one sludge and a chlorine-resistant type 021N in the other.

* Corresponding author. Mailing address: Laboratory for Microbial Ecology and Technology, Center for Environmental Sanitation, Ghent University, Coupure L 653, 9000 Ghent, Belgium. Phone: 32 9 264 59 76. Fax: 32 9 264 62 48. E-mail: Willy.Verstraete{at}rug.ac.be.

Applied and Environmental Microbiology, November 2001, p. 5303-5307, Vol. 67, No. 11
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.11.5303-5307.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.




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