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Organic solvent forward osmosis (OSFO) membrane technology is an excellent membrane separation process and a low-cost method for removing solvents, resulting in concentrated solvent recycling. This study investigated the reuse of two organic solvents at elevated levels using OSFO technology. In this study, the efficiency of OSFO for recovering two high-value organic solvents, tetrahydrofuran (THF) and dimethylformamide (DMF), from chemical industry wastewater was systematically investigated. The impact of draw solute concentration on solvent flux, reverse solute diffusion, and membrane selectivity (Js/Jw) was examined. Additionally, the influence of feed solution on the rejection and recovery efficiencies of dissolved chemical oxygen demand (COD), total dissolved solids (TDS), THF, and DMF was assessed. Optimal operational parameters for maximizing solvent recovery were identified, with particular attention to the effects of solvent permeability and osmotic pressure on both pollutant rejection and solvent recovery performance. The findings provide valuable insights into the application of OSFO as a sustainable and efficient alternative to treat the pollutants and to recover the solvents from industrial effluents like petrochemicals, pharmaceuticals, paints and coatings, electronic and semiconductors, printing and packaging, and textiles and dyes.

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Recovery of Two Merit Organic Solvents, Namely Tetrahydrofuran and Dimethylformamide, from Chemical İndustry Wastewaters with Organic Solvent Forward Osmosis (OSFO) Membrane Process for Water Saving

  • 章节

  • 发表日期：

    2026年

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  • Delia Teresa Sponza,
  • Rukiye Öztekin

摘要

Organic solvent forward osmosis (OSFO) membrane technology is an excellent membrane separation process and a low-cost method for removing solvents, resulting in concentrated solvent recycling. This study investigated the reuse of two organic solvents at elevated levels using OSFO technology. In this study, the efficiency of OSFO for recovering two high-value organic solvents, tetrahydrofuran (THF) and dimethylformamide (DMF), from chemical industry wastewater was systematically investigated. The impact of draw solute concentration on solvent flux, reverse solute diffusion, and membrane selectivity (Js/Jw) was examined. Additionally, the influence of feed solution on the rejection and recovery efficiencies of dissolved chemical oxygen demand (COD), total dissolved solids (TDS), THF, and DMF was assessed. Optimal operational parameters for maximizing solvent recovery were identified, with particular attention to the effects of solvent permeability and osmotic pressure on both pollutant rejection and solvent recovery performance. The findings provide valuable insights into the application of OSFO as a sustainable and efficient alternative to treat the pollutants and to recover the solvents from industrial effluents like petrochemicals, pharmaceuticals, paints and coatings, electronic and semiconductors, printing and packaging, and textiles and dyes.