INCREASING REPRODUCTION OF Azolla AQUATIC PLANTS IN THE CLIMATE CONDITIONS OF KHOREZM REGION AND ITS UTILIZATION IN THE PURIFICATION OF WASTEWATER

Currently, the protection of water and water basins from various contaminants are the most important and vital issues. The development of methods for the purification of wastewater in cities, industrial enterprises and agricultural production, as well, their use in the national economy are considered as pressing tasks that modern science is facing. This article provides information on the methods of scientific and practical significance of laboratory propagation of conditioned Azolla plants in the conditions of the Khorezm region and their use in biological wastewater treatment. Scientific research was carried out in the sewage of the city of Urgench, Khorezm region, separated from domestic enterprises. As a result of the study, when the physicochemical composition of the wastewater in the pond where the azole plant is grown was studied experimentally, water temperature rises from 26.5°C to 33.8°C, water environment increases from acidity to alkalinity (6.7-7.4), color changes from yellow to colorless, odor disappears, decrease in the amount of suspended solids (125.5-92.5), the amount of oxygen was 4.8 mg / l, The amount of (biochemical oxygen consumption per 5 days) (133.5-25.7 mg / l), the amount of O2 in the oxidation process from 139 to 48.9 mg / l and the amount of ammonia from 9.0 to 3.8 mg / l as well as the loss of nitrites, nitrates and sulfates decreased by 188.0-87.0 mg / l and chlorides by 117.0-84.0 mg / l.