Abstract
This article highlights the composition of wastewater from poultry farms and their suitability for irrigation of agricultural crops. It has been established that the chemical demand of wastewater from poultry farms is 480–850 mg О2/l, which indicates a high level of contamination with organic products. Coarse and finely dispersed substances vary within 430–720 mg/l, and biochemical oxygen consumption on the fifth day (BOD5) within 0.39–0.74 g О2/l, and at the time of mass effluent emissions it reached 15–1.6 g О2/l. The titer of Escherichia coli was equal to 10-6, the number of microbes ranged from 48.5 x 106 to 61.6 x 106. Determination of the suitability of wastewater based on generally accepted methods showed that they are quite suitable for irrigation of crops without additional reclamation measures.
Highlights
Water for irrigation in the arid zone of Central Asia, including the Republic of Uzbekistan, is a necessary factor in agriculture
To expand the area of irrigated agriculture, free water resources are needed, the available water resources in the republic can expand the area of irrigated agriculture 4.8 million hectares
Long-term studies to determine the quality of wastewater and their suitability for use for irrigating agricultural crops have shown the following: wastewater from poultry farms is characterized by a specific odor, cloudy color, slightly alkaline reaction of the medium, carbonate-sulphate, calcium-magnesium composition, according to the classification of Yu
Summary
Water for irrigation in the arid zone of Central Asia, including the Republic of Uzbekistan, is a necessary factor in agriculture. In the Republic of Uzbekistan, the main factor of food security is irrigated agriculture. To expand the area of irrigated agriculture, free water resources are needed, the available water resources in the republic can expand the area of irrigated agriculture 4.8 million hectares. Anthropogenic water transformations in the region have already reached a global scale: the intensive development of irrigated agriculture in the second half of the 20th century led to a significant increase in water intake from the Syr Darya and Amu Darya basins, which caused the Aral Sea to become shallow [4, 11]. In 2018 and 2019, water availability decreased significantly [6]
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