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Appl Environ Microbiol, July 1998, p. 2755-2759, Vol. 64, No. 7
Department of Civil and Environmental
Engineering1 and
Department of Molecular
Genetics,2 University of Cincinnati,
Cincinnati, Ohio 45221
Received 22 December 1997/Accepted 7 April 1998
The impact of preozonation and filter contact time (depth) on
microbial communities was examined in drinking water biofilters treating Ohio River water which had undergone conventional treatment (coagulation, flocculation, sedimentation) or solutions of natural organic matter isolated from groundwater (both ozonated and
nonozonated). With respect to filter depth, compared to filters
treating nonozonated waters, preozonation of treated water led to
greater differences in community phospholipid fatty acid (PLFA)
profiles, utilization of sole carbon sources (Biolog), and arbitrarily
primed PCR fingerprints. PLFA profiles indicated that there was a shift
toward anaerobic bacteria in the communities found in the filter
treating ozonated water compared to the communities found in the filter
treating nonozonated settled water, which had a greater abundance of
eukaryotic markers.
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Microbial Characterization of Biological Filters
Used for Drinking Water Treatment
*
Corresponding author. Mailing address: Department of
Civil and Environmental Engineering, University of Cincinnati, P.O. Box 210071, Cincinnati, OH 45221-0071. Phone: (513) 556-3692. Fax: (513)
556-2599. E-mail: rsummers{at}boss.cee.uc.edu.
Present address: Betz Dearborn, Inc., Jacksonville, FL 32256.
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