alexa Microbial population in a hydrogen-dependent denitrification reactor.
Microbiology

Microbiology

Applied Microbiology: Open Access

Author(s): Szekeres S, Kiss I, Kalman M, Soares MI

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Abstract The bacterial population in an H2-dependent denitrification system was studied. The laboratory set-up was designed for the treatment of potable water and consisted of an electrochemical cell, where the water to be treated was enriched with H2 prior to entering a bioreactor. Bioreactors (columns packed with granulated active carbon) were inoculated with denitrifying bacterial strains isolated from a previous reactor, then sampled immediately after inoculation, or after 1 or 3 months of continuous operation. Total number of the bacteria and numbers of each different strain were determined at various levels of the bioreactor. The strains present in the inoculum were identified as Ochrobactrum anthropi, Pseudomonas stutzeri, Paracoccus panthotrophus and Paracoccus denitrificans. Numbers of the latter declined markedly with time with the other three strains being responsible for nitrate removal. A correlation was found between the relative abundance of each strain and its specific denitrification activity.
This article was published in Water Res and referenced in Applied Microbiology: Open Access

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