A Staged Forward Osmosis Process for Simultaneous Desalination and Concentration of Textile Wastewaters

• DOI: 10.1021/acsestwater.2c00314
• Publication Date: 2022-08-16T18:45:33Z
• Authors: Kun Li; Meng Li; Wen Zhang; Yuxuan Xue; Zhangxin Wang; Xuan Zhang
• Keywords: Nanofiltration; Membrane Fouling; Ultrafiltration (renal); Textile

Textile wastewater treatment is highly challenging due to the simultaneous existence of organic compounds and inorganic salts. Herein, we report a novel application forward osmosis (FO), non-pressure-driven membrane process, in textile treatment. Specifically, symmetric FO with outstanding selectivity between salts organics (i.e., allowing permeation water while hindering organics) fabricated. With draw solution containing macromolecules sodium polyacrylate), staged process can achieve desalination concentration synthetic wastewaters (97.8–99.4% salt removal 10-fold dye concentration). Compared nanofiltration ultrafiltration processes conventional pressure-driven for treatment), experiences notably alleviated fouling. The fouling on be readily reversed by simple alkaline flushing. Lastly, was challenged running three-stage test practical real wastewater, demonstrating its viability. Overall, our study not only presents strategy but also broadens applications resource recovery.