Reclamation of printing effluents of a carpet manufacturing industry by membrane processes

The effluent from the print dying process of a carpet manufacturing industry was subjected to nanotiltration (NF) and ultrafiltration (UF) processes aiming at water reuse. Three alternatives were adopted; (i) NF, (ii) loose UF (MWCO 20,000 Da) followed by NF and (iii) tight UF (MWCO 1000 Da) followed by NE The separation performances and flux decline levels were compared for the detemination of the best process. Printing effluent was chemically precipitated using alum and fed to a lab-scale plate-and-frame membrane module under a trans-membrane pressure of 1.75 x 10(5) and 5.90 x 10(5) Pa (1.75 and 5.90 bar) for UF and NF processes, respectively. All the alternatives were tested in concentration mode of filtration where a volume reduction factor of up to 28.5 was achieved. The NF process provided very high separation performance for COD, color, turbidity, total solids and total hardness. The flux decline started at 16% and reached up to 31% at a volume reduction factor of 11.8. The loose and tight UF processes applied before NF to reduce this flux decline were not effective with a very severe flux decline of about 60% in both processes. The comparison resulted in a recommendation with single stage NF with adequate effluent characteristics.


Reclamation of acid dye bath wastewater: Effect of pH on nanofiltration performance
Capar, Goksen; Yılmaz, Levent; Yetiş, Ülkü (Elsevier BV, 2006-09-15)
of carpet manufacturing industry. ADBW, having acidic pH (5.0-5.9) originally, was subjected to pre-filtration through 1.0 mu m microfiltration (MF) media prior to nanofiltration (NF). Three treatment alternatives were adopted: (1) single NF without pH neutralization; (2) sequential NF without pH neutralization; (3) single NF with pH neutralization. Color was removed completely and turbidity was rejected by 79-92% in all alternatives. However, COD, total solids, total hardness and conductivity were partiall...
Treatment of silk production wastewaters by membrane processes for sericin recovery
Capar, Goksen; Aygun, S. Seylan; Gecit, M. Rusen (Elsevier BV, 2008-12-01)
Sericin protein, although a valuable resource for many industries including cosmetics, pharmaceutical and biomedical, has been discarded as a waste in silk industry, causing environmental pollution. This paper describes determination of a membrane-based process for sericin recovery from cocoon cooking wastewaters (CCW) that will enable value-added utilization of waste sericin. The iso-electric point (pI) of sericin was found as 5-6, whose MW was distributed as 180-200, 70-80, 30-40 and 10-25 kDa. Prior to m...
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...
Fouling behavior of microstructured hollow fibers in cross-flow filtrations: Critical flux determination and direct visual observation of particle deposition
Çulfaz Emecen, Pınar Zeynep; Wessling, M.; Lammertink, R.G.H. (Elsevier BV, 2011-04-15)
The fouling behavior of microstructured hollow fiber membranes was investigated in cross-flow filtrations of colloidal silica and yeast. In addition to the as-fabricated microstructured fibers, twisted fibers made by twisting the microstructured fibers around their own axes were tested and compared to round fibers. In silica filtrations, the three different fibers showed similar behavior and increasing Reynolds number increased the critical fluxes significantly. In yeast filtrations, the twisted fiber perfo...
Effect of operating parameters on selective separation of heavy metals from binary mixtures via polymer enhanced ultrafiltration
Muslehiddinoglu, J; Uludağ, Yusuf; Ozbelge, HO; Yılmaz, Levent (Elsevier BV, 1998-03-18)
Performance of continuous polymer enhanced ultrafiltration (PEUF) method was investigated for removal of mercury and cadmium from binary mixtures. This method includes the addition of polyethyleneimine (PEI) as a water soluble polymer to bind the metals, which was followed by ultrafiltration operation performed on both laboratory and pilot scale systems. The influence of various operating parameters such as temperature, metal/polymer ratio, presence of calcium ions and pH on retention of metals and permeate...
Citation Formats
G. Capar, Ü. Yetiş, and L. Yılmaz, “Reclamation of printing effluents of a carpet manufacturing industry by membrane processes,” JOURNAL OF MEMBRANE SCIENCE, pp. 120–128, 2006, Accessed: 00, 2020. [Online]. Available: