Abstract
This article presents the results of a comparative study of the method of biological treatment using aquatic plants and algae to improve the technology of treatment of domestic and municipal wastewater treatment plants formed in urban areas. According to test results, 5 species of aquatic plants and 2 strains of algae tested, pistachio and eucalyptus species, and strains of Chlorella vulgaris UA-1-6 were found to be resistant to domestic wastewater. This water plant laripistiya and eichorniya species grow well in different wastewater concentrations (25%, 50%, 100%) in the 100%. Both water treatment stations have a high yield and treatment levels. It was observed that it reached 90% at the "Binokor" water treatment station and the water treatment station "Salar" - 82-86%. This is because the amount of harmful substances in the wastewater of the "Salar" water treatment station is 5 times higher than the number of pollutants in the water treatment station "Binokor". It should be noted that the results of wastewater treatment works at 2 water treatment plants showed that the type of pistachio plant is more resistant to wastewater than the type of eucalyptus, and the level of treatment is also high. Therefore, in the experiment at the "Salar" water treatment station, we found it necessary to use the pistachio water plant itself. At this wastewater treatment station, wastewater treatment reached an average of 84%, and to increase the treatment efficiency, we grew Chlorella vulgaris in the second treatment stage and found that the treatment efficiency was 90-92%. This means that the treatment of wastewater in each treatment station requires the development of biological treatment technology following it.
Highlights
It is known that the Earth consumes 3300 - 3500 km3 of water per year, and the water demand is growing every year
The experimental results of Binokor aeration station effluent show that the condition, growth, and productivity of the 5 species of aquatic plants tested varied when grown in the effluent, including pistachio and eucalyptus
The results show that the pistachio plant did not grow well in 25 and 50% nutrient media than 100% nutrient medium, but we observed that it developed well in 100% nutrient medium and had high yields
Summary
It is known that the Earth consumes 3300 - 3500 km of water per year, and the water demand is growing every year This is due to the expansion of cities, the rapid development of industry and agriculture, the expansion of irrigated lands, population growth and the improvement of their living conditions, and other factors that complicate the water supply problem to mankind. The population is expected to reach 7.8 billion by 2030, and as a result, the demand for water resources will require another 50% of the water used by 2025. One of the factors in its prevention and elimination is the rational use of water resources, reuse of used water, and improvement of water protection measures [1,2,3]
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