The role of microorganisms isolated from some river waters of Azerbaijan in bioremediation

The article presents the results of research conducted on water and silt samples taken from river waters located in the southern region of Azerbaijan.Microbiological and physicochemical analyses were performed on the samples, and it was determined that the temperature ranged between 6 and 28 C, pH between 6.9 and 8.6, and dissolved oxygen between 4.5 and 11.2 mg/L, depending on the season.The number of saprotrophic bacteria in the water samples ranged from 2 to 42 million cells/ml, while in the silt samples, it ranged from 1 to 6 million cells/ml.The highest indicator was observed here, as Lenkeranchay is exposed to excessive anthropogenic impacts throughout the year.Cellulose degrading aerobic bacteria showed 46-236 cells/ml and anaerobic bacteria showed 14-545 cells/ml in 1 ml of water.The micromycetes isolated from the studied river waters represent 2 divisions, 6 classes, 8 orders, 9 families, 12 genera and 33 species.Of these, 28 species of micromycetes belong to the division Ascomycota, while 5 species belong to the division Zygomycota.If we quantify the obtained micromycetes, the division Ascomycota represents 84.8% and the division Zygomycota 15.2%.The role of the identified micromycete strains in the biodegradation of cellulose was determined and it was found that Trichoderma viride and Aspergillus terreus species were more active in the biodegradation process.Cellulose-degrading bacteria and micromycetes were found to completely degrade filter paper and cotton residues within 10-30 days.The results of the research provide important information on the health of river ecosystems and the protection and conservation of water resources.