Effect of cross flow velocity, feed concentration, and pressure on the salt rejection of nanofiltration membranes in reactive dye having two sodium salts and NaCl mixtures: model application.

In this study, effects of cross flow velocity, feed concentration, and pressure on the permeate flux and salt rejection were investigated by nanofiltration membranes. DS5 DK type nanofiltration membrane was tested and reactive orange 16 (RO16), reactive blue 19 (RB19) and NaCl were used in the experiments to prepare the synthetic reactive dye and salt mixtures. The study indicated that operating conditions are very important for both permeate fluxes and salt rejections during nanofiltration of dye and salt mixtures.

Quality of the bottom sediment prior to dredging in the Golden Horn of Istanbul.

The Golden Horn has experienced severe pollution due to uncontrolled domestic and industrial wastewater discharges until recent years. A restoration project has been developed by our universities, upon a request from Istanbul Metropolitan Municipality. Two principal alternatives for the dredging and disposal of the bottom sediments were considered: disposing on the land and disposing in the sea.

Factors influencing flux decline during nanofiltration of solutions containing dyes and salts.

In this paper, factors influencing the flux decline of nanofiltration membranes for the treatment of dye bath wastewaters were investigated. Experiments were performed with synthetic wastewaters. Synthetic solutions were prepared in different dye and salt concentrations at laboratory conditions.

Comparative evaluation of the results for the synthetic and actual reactive dye bath effluent treatment by nanofiltration membranes.

In this study, the results of nanofiltration experiments carried out on reactive dye house wastewaters are presented. The experiments were performed using lab-scale membrane system. Permeate quality was appropriate to reuse permeate in dyeing process again.

Pilot scale nanofiltration membrane separation for waste management in textile industry.

This paper presents the pilot scale membrane separation studies on dyehouse effluents of textile industry. Nanofiltration (NF) membranes which have 2 m2 of surface area were evaluated for membrane fouling on permeate flux and their suitability in separating COD, color and conductivity in relation to operating pressure and feed concentration from textile industry dyehouse effluents. Successive batch runs demonstrated that any serious membrane fouling was not experienced for NF membrane tested in treating this type of wastewater.