Characterisation of efficient denitrifying bacteria strains isolated from activated sludge by 16S-rDNA analysis

摘要

In order to investigate the diversity of the most efficient denitrifying bacterial species in activated sludge more than 1500 bacterial strains were isolated from five different municipal wastewater treatment plants. The 24 most efficient denitrifying bacteria strains were selected and submitted for partial 16S rRNA analyses. Result indicated that five strains were members of the Rhodobacter group, 16 of Rubrivivax subgroup, one of Pseudomonas subgroup and two unidentified though showing high similarity to certain members of the Brucella assemblage. This indicates efficient denitrifying bacterial strains in activated sludge are members of a restricted number of bacterial taxa dominated by Rubrivivax subgroup. (C) 1998 Published by Elsevier Science Ltd. All rights reserved. [References: 27]