Comprehensive study of the ecological potential of aboriginal microorganisms in the Arctic region

4th International Scientific Conference "Arctic: History and Modernity"

生态环境科学;历史学

Kramarenko, E.V.^1 ; Makarevich, E.V.^1 ; Litvinova, M.Y.^1

Department of Microbiology and Biochemistry, Institute of Nature and Technology, Murmansk State Technical University, Murmansk, Russia^1

关键词: Bacterial cultures;    Chemical compositions;    Environmental characteristic;    Flocculating activity;    Morphological characteristic;    Optimum concentration;    Phosphorus concentration;    Qualitative compositions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/302/1/012158/pdf
DOI  :  10.1088/1755-1315/302/1/012158

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

As a result of the conducted research, the chemical composition of bioflocculant-producing microorganisms' habitats was determined, which was characterized by a low content of organic substances and a large number of ammonium salts and phosphates in the studied aquatic ecosystems. Quantitative and qualitative composition of the studied bacteriocenosis in the studied hydro-ecosystems was presented as various physiological groups of bacteria with a quantitative predominance of heterotrophic nitrifying microorganisms, the main representatives of the active sludge. The shift of the optimal C/P ratio due to the low load on the bacteriocenosis of treatment facilities led to a slower growth of microbial biomass, and as a consequence, to a decrease in the degree of wastewater treatment. To achieve the full effect is possible, improving the ability of the sludge to sedimentation, to adsorb oxidized substances inside. The cultures of bacteria Pseudomonas lundensis, Aeromonas eucrenophyla and Pseudomonas fragi, experimentally extracted from the anthropogenically invaded water pools, confirmed the correlation between the primary morphological characteristics of the bacteria's flocculating ability and the high flocculating activity of these microorganisms, as well as the conditions of their cultivation. The developed reference nutrient environments for the cultivation of allocated strains of bacteria differed significantly in the ratio of biogens (C/N, C/P and N/P). It was noted that the growth rate of the culture largely depended on the environmental characteristics that determine the intensity of metabolic processes. The growth rates of cultures on media of different composition varied widely and were most correlated with the relative content of phosphates in the environment. Optimum concentrations of bacteria cells required to implement the bio-potential are directly dependent on the phosphorus concentration load on the microorganisms. The phosphorus concentration did not have a significant effect on the studied bacterial cultures' flocculation, but the limiting factor was the phosphorus nature.