Microfiltration/ultrafiltration as pretreatment for reclamation of rinsing waters of indigo dyeing

This paper focuses Oil the applicability of microfiltration (MF)/ultrafiltration (UF) as a pretreatment to nanofiltration (NF) for the reclamation of rinsing waters of indigo dyeing process. Two different MF alternatives, single 5 mu m MF and sequential 5 mu m + 0.45 mu m MF, were evaluated as prefiltration to improve the performance of the proceeding UF stage. UF tests performed after 5 pin MF Using 100 kDa, 50 kDa, 20 kDa, 2 kDa and 1 kDa membranes have indicated that all the UF membranes provided the same cumulative color retention of 98-99%. However, in terms of COD retention, UF membranes presented different performances and the highest retentions were by both 50 kDa (56%) and 100 kDa (59%) membranes. As regards permeation rate, 100 kDa and 50 kDa UF membranes appeared to have the highest flux decline chic to fouling. When sequential MF (5 mu m + 0.45 mu m) was adopted to decrease this fouling, 0.45 mu m MF before UF was found not to provide any significant improvement. Thus. single stage 5 mu m MF followed by 100 kDa UF was selected as the best prefiltration train to NF that permits the textile producer to reclaim indigo dyeing wastewater.


Treatment of a denim producing textile industry wastewater using pilot-scale membrane bioreactor
YİĞİT, Nevzat Özgü; Uzal, N.; KÖSEOĞLU, Hasan; Harman, I.; Yukseler, H.; Yetiş, Ülkü; CİVELEKOĞLU, Gökhan; KİTİŞ, Mehmet (Elsevier BV, 2009-05-15)
The objective of this study was to investigate the performance of a pilot-scale membrane bioreactor (MBR) system for the treatment of a highly concentrated mixed wastewater from wet processes (dyeing, finishing, and sizing) of a denim producing textile industry. The MBR system, containing a Submerged hollow fiber membrane module in the aeration tank, was operated aerobically for about 3 months on-site at a continuous flow mode. The system was operated at two different operation stages: (1) 110 Sludge wastag...
Most effective pre-treatment to nanofiltration for the recovery of print dyeing wastewaters
Capar, Goksen; Yetiş, Ülkü; Yılmaz, Levent (Elsevier BV, 2007-06-25)
This paper presents the determination of the best pre-treatment method to nanofiltration (NF) for the recoverv of print dyeing wastewaters (PDW) of the carpet manufacturing industry. Chemical precipitation (CP) with optimum alum (Al-2 SO4.18H O-2) dose was chosen among five alternatives; 1) Dead-end microfiltration (MF), 2) CP with optimum coagulant dose, 3) CP with low coagulant dose and polyelectrolyte aid, 4) CP with low coagulant dose followed by MF, 5) CP with high coagulant dose followed by ultrafiltr...
Karakaş, Gürkan (Wiley, 1989-01-01)
Effects of concentration changes in initiator species Na2SO3, (NH4)2S2O8 and CuSO4, and emulsifier, ammonium stearate, on poly(vinyl chloride) (PVC) emulsion polymerization kinetics and on product particle size were experimentally investigated. It was observed that to obtain industrially significant rates and overall conversions, not only an optimum concentration ratio of Na2SO3/(NH4)2S2O8/CuSO 4 must be used, but also the concentrations of these species must be above certain limits. Increasing the concentr...
Corrosion behaviours of Ti6Al4V-Mg/Mg-Alloy composites
ESEN, ZİYA; Ocala, Ezgi Butev; Akkaya, Asli; Gurcay, Bensu; Ozcan, Ceren; Ozgumus, Burcu Asli; Duygulu, Ozgur; Dericioğlu, Arcan Fehmi (Elsevier BV, 2020-04-15)
The effect of coupling of unalloyed Mg and Mg-alloys (AZ91 and WE43) with Ti6Al4V alloy on corrosion and degradation behaviours of produced composites has been investigated in simulated body fluid (SBF) by hydrogen evolution, and surface and electrochemical characterization techniques. Combining of unalloyed Mg with Ti6Al4V intensified galvanic corrosion and catastrophic failure occurred by initiation of microcracks formed by sudden hydrogen gas evolution. In contrast to other composites, Ti6Al4V-AZ91 compo...
Nanofiltration and Reverse Osmosis for Reuse of Indigo Dye Rinsing Waters
Uzal, Nigmet; Yılmaz, Levent; Yetiş, Ülkü (Informa UK Limited, 2010-01-01)
A membrane based treatment strategy was developed for the possible recycling of rinsing wastewater from indigo dyeing to the process itself. Performances of three different nanofiltration (NF) (NF 270 and NF 90, Dow Film Tech, USA and NF 99, Alfa Laval, Denmark) and two different reverse osmosis (RO) (HR 98 PP and CA 995 PE, Alfa Laval, Denmark) membranes were investigated with wastewater collected from the first post-rinsing tank of indigo dyeing process of a denim manufacturing plant. Dead-end microfiltra...
Citation Formats
N. Uzal, L. Yılmaz, and Ü. Yetiş, “Microfiltration/ultrafiltration as pretreatment for reclamation of rinsing waters of indigo dyeing,” DESALINATION, pp. 198–208, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48208.