Recovery of Water from Textile Dyeing Using Membrane Filtration Processes

The aim of the work was to purify model textile wastewater (MTW) using a two-stage membrane filtration process comprising nanofiltration (NF) and reverse osmosis (RO). For this purpose, a nanofiltration membrane TFC-SR3 (KOCH) and reverse osmosis membrane AG (GE Osmonics) were used. Each model waste...

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Bibliographic Details
Published in:Processes 2021-10, Vol.9 (10), p.1833
Main Authors: Marszałek, Joanna, Żyłła, Renata
Format: Article
Language:English
Subjects:
Adsorption
Cellulose
Cellulose fibers
Condensates
Condensation products
Deionization
Detergents
Dyes
Filtration
Membrane filtration
Membranes
Nanofiltration
Osmosis
Pollutants
Polysiloxanes
Reverse osmosis
Surfactants
Textile industry
Textiles
Wastewater treatment
Water purification
Water treatment
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Summary:The aim of the work was to purify model textile wastewater (MTW) using a two-stage membrane filtration process comprising nanofiltration (NF) and reverse osmosis (RO). For this purpose, a nanofiltration membrane TFC-SR3 (KOCH) and reverse osmosis membrane AG (GE Osmonics) were used. Each model wastewater contained a selected surfactant. The greatest decrease in flux in the initial phase of the process occurred for the detergents based on fatty-acid condensation products. An evident decrease in performance was observed with polysiloxane-based surfactants. No fouling effect and high flux values were observed for the wastewater containing a nonionic surfactant based on fatty alcohol ethoxylates. During RO, a significantly higher flux and lower resistance were observed for the feed that originally contained the anionic agent. For the MTW containing the nonionic surfactant, the conductivity reduction ranged from 84% to 92% depending on the concentrate ratio at the consecutive stages of RO. After treatment, the purified wastewater was reused in the process of dyeing cellulose fibers with reactive dyes. The research confirmed that textiles dyed with the use of RO filtrates did not differ in quality of dyeing from those dyed in pure deionized water.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr9101833