Treatment of reactive dyeing wastewater and recovery of brackish water by applying ultrafiltration

Erkanlı, Mert
Reactive dyeing wastewaters (RDW) originating from textile industry are highly colored and have high total organic carbon (TOC), turbidity and salinity content. Ultrafiltration (UF) scenario suggested here aims to keep salt in permeate and reuse resulting permeate in dyeing process. For this purpose, RDW samples were treated with 5 kDa PES and 2 kDa Thin Film GE Osmonics UF membranes. After single stage filtrations, two stage “5 kDa+5 kDa”, “5 kDa+2 kDa” and “2 kDa+2 kDa” applications were carried out at 2 bar with a concentration factor of 2.5; and all the applications retained less than 10% salt. The first scenario provided the lowest color retention of 94% while the other two provided over 98% color retention. The “5 kDa+2 kDa” and “2 kDa+2 kDa” applications retained turbidity and TOC at similar levels of 97-98% and 78-83%, respectively. However, permeate flux from the 5 kDa first stage application was three times higher than the 2kDa first stage application. Dyeing tests have shown that the permeate of “5 kDa+2 kDa” was successful in dyeing middle and dark shaded green, and that of “2 kDa+2 kDa” in dyeing light and middle shaded green. In coloring dark red, both permeates achieved good results. There were no significant loss in permeate qualities of both applications when concentration factor was taken to 10. When the filtration pressure was doubled, filtration fluxes were doubled for both membranes, however the decrease in filtration flux of first stage 5 kDa was more drastic than first stage 2 kDa. 


Fouling analysis for different ultrafiltration membranes in reactive dyeing wastewater treatment
Zaf, Ruken Dilara; Yetiş, Ülkü; Çulfaz Emecen, Pınar Zeynep; Department of Environmental Engineering (2017)
Textile industry produces wastewater that is often very rich in salt and color, containing residues of dyes and other chemicals. Treating this wastewater to exceptionally high quality standards, typically for reuse purposes, necessitates advanced treatment methods among which membrane technology is a leading one. However, membrane fouling which can be caused by dissolved and particulate solids appears as the major limitation with the use of membranes in wastewater reclamation that leads to reduced efficienc...
Recovery of brackish water from reactive dyeing wastewater by ultrafiltration
Erkanlı, Mert; ZAF, RUKEN DİLARA; Yılmaz, Levent; Çulfaz Emecen, Pınar Zeynep; Yetiş, Ülkü (2017-02-06)
In this study, brackish water recovery from a real reactive dyeing textile effluent for reuse of water and salt was investigated. With the aim of improving the overall retention of species that are partly retained in a single stage, three different two-stage ultrafiltration scenarios were considered: 5 kDa followed by 5 kDa, 5 kDa followed by 2 kDa and 2 kDa followed by 2 kDa. The 2 kDa + 2 kDa scenario reduced the total organic carbon (TOC) from 239 +/- 9 mg/L to 41 +/- 7 mg/L, at 2 bar of transmembrane pr...
A life cycle assessment of the membrane processes applied for salt recovery in reactive dyeing
Şimşek, Naz Zeynep; Yetiş, Ülkü; Department of Environmental Engineering (2022-8-26)
Reactive dyeing in the textile industry requires the addition of a significant amount of salt and generates wastewater that is high in pollution load and particularly high in salt concentration. In the literature, a variety of Best Available Techniques (BATs) for the reduction of salt consumption in reactive dyeing and the reuse of treated wastewater are available. Among these techniques, Ultrafiltration (UF), Nanofiltration (NF), and combined UF+NF systems appear as the most efficient BATs, as they can pro...
Sonocatalytic fenton oxidation process using natural martite for treatment of color in water
Dindarsafa, Mahsa; İmamoğlu, İpek; Khataee, Alireza; Department of Environmental Engineering (2017)
This study aims to investigate the removal efficiency of an organic dye, Acid Blue 92 (AB92), using heterogeneous sono-Fenton-like process and compare it with its homogeneous counterpart. High energy planetary ball milling was applied to prepare sono-Fenton nanocatalyst from natural martite. The unmilled and ball milled samples were characterized by XRD, FT-IR, SEM, EDX and BET analyses. The catalytic performance of the 6h ball milled martite was the best for removal of AB92 in heterogeneous sono-Fenton-lik...
Catalytic ozonation of an industrial textile wastewater in a heterogeneous continuous reactor
Polat, Didem; Balci, Irem; Ozbelge, Tulay A. (2015-09-01)
Textile wastewaters (WWs) are highly colored and non-biodegradable having variable compositions of colored dyes, surfactants and toxic chemicals. Discharge of these WWs to the environment is very detrimental for ecosystems, therefore new methods have been investigated in order to meet the quality criteria of water and the discharge standards of the partly treated WWs. Recently, catalytic ozonation being one of the advanced oxidation processes (AOPs), is considered as an effective method that can be used in ...
Citation Formats
M. Erkanlı, “Treatment of reactive dyeing wastewater and recovery of brackish water by applying ultrafiltration,” M.S. - Master of Science, Middle East Technical University, 2016.