Uman NUH | today: 07/13/2020

Composition and interspecies relations in immobilized nitrogen-transforming microbiocenoses of treatment facilities

Author(s) , , ,
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Category The Agronomy
year 2020 issue Випуск 96 Частина 1
pages 355-368 index UDK 628.335.1+579.695
DOI 10.31395/2415-8240-2020-96-1-355-368 (Link)
Abstract The use of biological disc installations in biological wastewater treatment can significantly intensifies the removal of pollutants, including through the immobilization of microbiocenoses. The processes of transformation of nitrogen-containing compounds by these microbiocenoses and their environmental properties have been little studied. In the presence of organic and inorganic nitrogen compounds in wastewater, microbiocenoses of treatment plants are able to turn them into the main (aerobic and anaerobic) processes of the nitrogen circuit. Modern research in microbiology has significantly changed the idea of these stages, especially their oxidative branches. The purpose of the work is to determine the main ecological and trophic groups of microorganisms included in the nitrogen-transforming microbiocenosis, which immobilized in a bio-disk installation and the spatial relationships between them. The object of the study was immobilized microbiocenoses, which were formed during the treatment of wastewater of various compositions. Studies were aimed at identifying of ecological-trophic groups that remove ammonia and total nitrogen from wastewater. The composition of ecological trophic groups was determined using three methods: microbiological (seeding biofilm samples in elective mediums), physiological (analysis of water-soluble and gaseous metabolites) and biochemical (inhibitory analysis). In the immobilized biofilm, which was formed in the presence of organic substances in the medium, ammonifiers, ammonium-oxidizing bacteria and archaea, nitrite-oxidizing and denitrifying bacteria were identified. In the biofilm, which was formed in the absence of organic substances, anammox bacteria, ammonium-oxidizing bacteria and archaea, nitrite-oxidizing and denitrifying bacteria were detected. Between them — interspecies relations of spatial and substrate synergies and competition. The revealed dependences are necessary for the management and intensification of deep wastewater treatment from nitrogen compounds.
Key words wastewater treatment, immobilized microbiocenosis, conversion of nitrogen compounds, nitrification, anammox process, denitrification
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