Annotation

Purpose: to analyze engineering solutions for cleaning drainage and waste water from rice irrigation systems for further development of a block-modular station for their treatment and reuse for irrigation needs.

Discussion. In 2023, the volume of wastewater in the Russian Federation was 37.47 cub. km, of which 11.5 % were in the agricultural sector. The volume of drainage and waste water from irrigated lands throughout the country was 3.015 cub. km, most of which is generated in rice irrigation systems. For the rational use of water resources, a recirculating water management system is used in such systems. Drainage and waste water from rice irrigation systems is characterized by an increased content of organic matter (pesticides and their metabolites) and high salinity. Depending on the initial quality of the waters under consideration, all purification methods are divided into biochemical, sorption, demineralization and construction of a bioplateau. Reuse of drainage and waste water from the outlet channels of rice irrigation systems is possible only if they are purified, which eliminates the process of secondary soil salinization and deterioration of their general ecological and reclamation state. Patent analysis showed that the main developments are aimed at the possibility of reusing waste water from rice paddies for irrigation without taking into account the chemical composition of the water. Almost all technologies are focused on biochemical and sorption treatment of waste water from rice systems; the main factor of negative impact on soils, natural watercourses, groundwater, namely high salinity, is not eliminated. 

Conclusion. Analysis of technical solutions for treatment of drainage and waste water from a rice irrigation system showed that when developing a treatment plant design, it is necessary to be guided by the chemical composition of drainage and waste water, the general ecological and meliorative state of irrigated lands and to justify the financial costs of constructing a treatment plant.

For quoting

Milchenkova D. V., Drovovozova T. I. Information and analytical review of engineering solutions for drainage and discharge water treatment from rice irrigation systems. Ways of Increasing the Efficiency of Irrigated Agriculture. 2025;95(1):299–317. (In Russ.).

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