Low Temperature and Neutral pH Define "Candidatus Nitrotoga sp." as a Competitive Nitrite Oxidizer in Coculture with Nitrospira defluvii.

ABSTRACT: Nitrification is an essential process for N removal in activated sludge to avoid toxicity of ammonium and nitrite. Besides Nitrospira, "Candidatus Nitrotoga" has been identified as a key nitrite-oxidizing bacterium (NOB) performing the second step of nitrification, nitrite oxidation to nitrate, in wastewater treatment plants (WWTPs). However, the driving forces for the dominance of Nitrotoga in certain plants have often remained unclear and could not be explained solely by temperature effects. In this study, we characterized the physiology of the ammonium-dependent Nitrotoga sp. BS with regard to temperature and pH variations and evaluated its competitiveness against Nitrospira defluvii Both NOB originated from the same WWTP and shared a comparable pH opt

SUBMITTER: Wegen S 

PROVIDER: S-EPMC6495747 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature