This thesis investigates the issue of water contamination by organic solvents, which pose a significant threat to both the environment and human health. As a potential solution, the study focuses on the application of reverse osmosis, one of the most effective membrane technologies for water purification. The primary objective was to reduce the content of ethanol and isopropanol in water and to evaluate the performance of two different membranes under various operating conditions. The experimental work was carried out using a spiral-wound module fitted with two membranes. Tests were performed at different pressures and feed solution concentrations, with solvent concentrations measured before and after filtration. From these measurements, retention rates were calculated and the results for the two membranes were compared. The findings showed that both membranes achieved high removal rates of ethanol and isopropanol, with performance differences depending on the operating parameters. The best results were obtained at higher pressures and lower feed solution concentrations. Based on these results, the tested membranes demonstrate strong potential for industrial applications, particularly in the treatment of wastewater contaminated with organic solvents. Nevertheless, further research is recommended, including the testing of a wider range of organic compounds and the long-term assessment of membrane performance and stability.
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