Treatment of textile dye effluent using a self-made positively charged nanofiltration membrane

Abstract

A self-made positively charged nanofiltration(NF) membrane was used to treat textile dye effluent to generate water for reuse, and the factors affecting nanofiltration process such as operating pressure, feed fl ow and membrane cleaning were investigated. With an applied pressure of 1.0 MPa and a feed fl ow of 40 L/h, this NF membrane has a removal of 93.3% for CODcr and a reduction of approximately 51.0% in TDS, salinity and conductivity achieving the chroma removal of 100%. The permeate obtained through this membrane is suitable for recycling. Moreover, the membrane could be reused after being cleaned with 1% NaOH solution.