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Appl Environ Microbiol, January 1998, p. 359-362, Vol. 64, No. 1
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Impact of Inoculation Protocols, Salinity, and pH on the Degradation of Polycyclic Aromatic Hydrocarbons (PAHs) and Survival of PAH-Degrading Bacteria Introduced into Soil

Matthias Kästner,* Maren Breuer-Jammali, and Bernd Mahrodagger

Department of Biotechnology II, Technical University of Hamburg-Harburg, 21071 Hamburg, Germany

Received 22 July 1997/Accepted 16 October 1997

Degradation of polycyclic aromatic hydrocarbons (PAHs) and survival of bacteria in soil was investigated by applying different inoculation protocols. The soil was inoculated with Sphingomonas paucimobilis BA 2 and strain BP 9, which are able to degrade anthracene and pyrene, respectively. CFU of soil bacteria and of the introduced bacteria were monitored in native and sterilized soil at different pHs. Introduction with mineral medium inhibited PAH degradation by the autochthonous microflora and by the strains tested. After introduction with water (without increase of the pore water salinity), no inhibition of the autochthonous microflora was observed and both strains exhibited PAH degradation.

* Corresponding author. Present address: Institute of Microbiology, Department of Technical Microbiology, Friedrich-Schiller-University, Philosophenweg 12, 07743 Jena, Germany. Phone: (49) 3641-949300. Fax: (49) 3641-949302. E-mail: kaestner{at}merlin.biologie.uni-jena.de.

dagger Present address: Bremen Polytechnic, Institute of Environmental Technology, Department of Civil Engineering, 28199 Bremen, Germany.




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