Journal
MICROBIOLOGY
Volume 84, Issue 2, Pages 256-262Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0026261715020101
Keywords
anaerobic ammonium oxidation; new species; description; Candidatus Jettenia moscovienalis sp nov.; wastewater treatment
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Funding
- Ministry of Education and Sciences of the Russian Federation in the scope of the Federal Targeted Program Research and Development in Priority Fields of S&T Complex of Russia [14.607.21.018, RFMFFI60714X0018]
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A new species of bacteria oxidizing ammonium with nitrite under anoxic conditions was isolated from the activated sludge of a semi-industrial bioreactor treating digested sludge of the Kuryanovo wastewater treatment plant (Moscow, Russia). Physiological, morphological, and molecular genetic characterization of the isolate was carried out. The cells were ovoid (similar to 0.5 x 0.8 mu m), with the intracellular membrane structures characteristic of anammox bacteria (anammoxosome and paryphoplasm); unlike other anammox bacteria, it possessed extensive intracellular membrane structures located in layers parallel to the cytoplasmic membrane, but never close to the anammoxosome. The cells formed aggregates 5-28 mu m in diameter and readily attached to solid surfaces. The cells were morphologically labile, easily plasmolyzed, and lost their content. Doubling time was 28 days, mu(max) = 0.025 day(-1); optimal temperature and pH for growth were 20-45A degrees C and 8.0, respectively. Phylogenetic analysis of the 16S rRNA gene sequences suggested its classification as a new species of the candidate genus Jettenia (order Planctomycetales). The name Candidatus Jettenia moscovienalis sp. nov. was proposed for the new bacterium.
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