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 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.

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Sensory quality of drinking water produced by reverse osmosis membrane filtration followed by remineralisation

Water Research ◽

10.1016/j.watres.2016.02.043 ◽

2016 ◽

Vol 94 ◽

pp. 42-51 ◽

Cited By ~ 12

Author(s):

Monique H. Vingerhoeds ◽

Mariska A. Nijenhuis-de Vries ◽

Nienke Ruepert ◽

Harmen van der Laan ◽

Wender L.P. Bredie ◽

...

Keyword(s):

Drinking Water ◽

Reverse Osmosis ◽

Membrane Filtration ◽

Sensory Quality ◽

Reverse Osmosis Membrane

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Surface Modification of Composite Membranes by Coating PVA/TiO2 Layer

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.804.299 ◽

2015 ◽

Vol 804 ◽

pp. 299-303

Author(s):

Baturalp Yalcinkaya ◽

Jiri Chaloupek

Keyword(s):

Waste Water ◽

Reverse Osmosis ◽

Metal Ion ◽

Sea Water ◽

Composite Membranes ◽

Aluminum Production ◽

Filtration Process ◽

Ion Rejection ◽

Reverse Osmosis Membranes

Water pollution comprises all of those compounds that change the quality of groundwater and surface water, therefore reducing the suitability of natural water for human use and other vital processes. These compounds result from human activities, especially those that are industrial, agricultural and domestic.The polyamide thin film composite reverse osmosis membranes become important in desalination of sea water and brackish water or waste water. However the polyamide reverse osmosis membranes tend to fouling due to their hydrophobic and rough surfaces. In this study flux and rejection of waste water from aluminum production industry were obtained during filtration process by using modified commercial composite membranes. Amount of fouling was evaluated with unmodified and modified membranes. Rejection of iron particles and PH of feed and permeate solutions were determined after filtration process. Results shows that modified membranes were performed higher metal ion rejection and antifouling performance than unmodified membranes.

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Comparative Study on the Treatment of Biologically Treated Textile Effluent by Nanofiltration and Reverse Osmosis for Water Reuse

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.441.584 ◽

2012 ◽

Vol 441 ◽

pp. 584-588

Author(s):

San Chuan Yu ◽

Zhi Wen Chen ◽

Mei Hong Liu ◽

Jing Wei Zhao

Keyword(s):

Reverse Osmosis ◽

Water Reuse ◽

Cross Flow ◽

Water Shortage ◽

Nanofiltration Membrane ◽

Reverse Osmosis Membrane ◽

Permeate Flux ◽

Flux Decline ◽

Salinity Reduction ◽

Ro Membrane

In view of the water shortage, the increasingly severe regulations as well as the release thresholds, it is becoming increasingly necessary to reuse the textile effluents. This work concerned the treatment of textile plant effluent after conventional biological processing by membrane technology for water reuse. Desal5 DK nanofiltration (NF) membrane and BW30 reverse osmosis (RO) membrane were investigated in this study in terms of COD and color removal, salinity reduction as well as permeate flux through cross-flow permeation tests. The results showed that the Desal5 DK nanofiltration membrane exhibited higher stabilized water permeability and flux decline than the reverse osmosis membrane because of its higher porosity and tendency towards fouling. The BW30 reverse osmosis membrane reduced salinity to a great extent than the Desal5 DK nanofiltration membrane. While the nanofiltration membrane exhibited better COD removal efficiency compared to the RO membrane, possibly due to its sieving removal mechanism. The treated water with good enough quality could be recycled back into the process, thereby offering economical benefits by reducing the water consumption and wastewater treatment cost.

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