Evaluation of a novel low-carbon to nitrogen- and temperature-tolerant simultaneously nitrifying-denitrifying bacterium and its use in the treatment of river water.

ABSTRACT: In this study, a simultaneously heterotrophic nitrifying-aerobic denitrifying bacterium, designated KSND, was newly isolated from a lake wetland. Its removal efficiencies for 160 mg L^-1 ammonium, 105 mg L^-1 nitrate, and 8.39 mg L^-1 nitrite were 86.56%, 74.52%, and 100% in 24 h, with removal rates of 5.77 mg L^-1 h^-1 for NH₄ ⁺-N, 3.26 mg L^-1 h^-1 for NO₃ ^--N, and 0.35 mg L^-1 h^-1 for NO₂ ^--N. The bacterium retained ∼63% of its maximal removal rate at 10 °C and 56% of its maximal removal rate at a carbon to nitrogen (C/N) ratio of 4 : 1, with no nitrite accumulation. Gene-specific PCR indicated the absence of the key genes for nitri

SUBMITTER: Jin P 

PROVIDER: S-EPMC9083895 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature