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Applied and Environmental Microbiology, April 2009, p. 2566-2572, Vol. 75, No. 8
0099-2240/09/$08.00+0     doi:10.1128/AEM.02260-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Effect of Biowaste Sludge Maturation on the Diversity of Thermophilic Bacteria and Archaea in an Anaerobic Reactor{triangledown}

M. Goberna,* H. Insam, and I. H. Franke-Whittle

Universität Innsbruck, Institut für Mikrobiologie, Technikerstrasse 25 d, 6020 Innsbruck, Austria

Received 1 October 2008/ Accepted 2 February 2009

Prokaryotic diversity was investigated near the inlet and outlet of a plug-flow reactor. After analyzing 800 clones, 50 bacterial and 3 archaeal phylogenetic groups were defined. Clostridia (>92%) dominated among bacteria and Methanoculleus (>90%) among archaea. Significant changes in pH and volatile fatty acids did not invoke a major shift in the phylogenetic groups. We suggest that the environmental filter imposed by the saline conditions (20 g liter–1) selected a stable community of halotolerant and halophilic prokaryotes.

* Corresponding author. Mailing address: Universität Innsbruck, Institut für Mikrobiologie, Technikerstrasse 25 d, 6020, Innsbruck, Austria. Phone: 43 512 507 5995. Fax: 43 512 507 2928. E-mail: marta.goberna{at}uibk.ac.at

{triangledown} Published ahead of print on 13 February 2009.

Applied and Environmental Microbiology, April 2009, p. 2566-2572, Vol. 75, No. 8
0099-2240/09/$08.00+0     doi:10.1128/AEM.02260-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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