WATER TREATMENT TECHNIQUES AND TECHNOLOGIES FOR DRIP IRRIGATION OF AGRICULTURAL LAND

Abstract

The purpose of the research is to select the optimal variant of the technological scheme and structure of water purification facilities parameters based on data analysis of water quality in the water source and requirements of emitters for water quality with the obligatory linking the treatment plants capacity with design water discharge of the irrigation system. In the course research requirements for the irrigation water quality depending on the nature of the water flow were formulated. The location plans of sewage treatment plants in drip irrigation systems are proposed. Recommendations on choosing the optimal variant of the water treat-ment scheme in drip irrigation systems depending on the quality of the source water are given. When using water sources with a high content of suspended solids up to 1000 mg/l for irriga-tion, a two-step purification of the source water is necessary. With the required capacity of sewage treatment plants up to 3750 cubic meters per hour, the treatment using a drum grid with cell sizes from 0.025 to 0.25 mm or pressure mesh screens with cell sizes from 0.2 to 2.5 mm plus coarse-grained filters is recommended. The performance of hydrocyclones, coupled with gravel-quartz filters or floating load filters reaches 20 cubic meters per hour when the content of suspended particles in the source water is up to 300 mg/l. The rationality of using a particular facilities complex depends on the technological and economic efficiency of their work on a specific water, on the type of drip irrigation system adopted, which requires careful study at the methodological design stage.

Keywords

• irrigation water quality
• drip irrigation system
• sewage treatment plants
• non-reagent water treatment
• two-stage purification
• micro-filter
• floating-load filter.