Fermentative Bacteria Influence the Competition between Denitrifiers and DNRA Bacteria.

ABSTRACT: Denitrification and dissimilatory reduction to ammonium (DNRA) are competing nitrate-reduction processes that entail important biogeochemical consequences for nitrogen retention/removal in natural and man-made ecosystems. The nature of the available carbon source and electron donor have been suggested to play an important role on the outcome of this microbial competition. In this study, the influence of lactate as fermentable carbon source on the competition for nitrate was investigated for varying ratios of lactate and nitrate in the influent (Lac/N ratio). The study was conducted in an open chemostat culture, enriched from activated sludge, under strict anoxia. The mechanistic explanation of the conversions observed was based on integration of results from specific batch tests with bioma

SUBMITTER: van den Berg EM 

PROVIDER: S-EPMC5591879 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature