Abstract: Membrane filtration coupled with ozonation of the retentate was used for the treatment of colored textile wastewater The textile wastewater examined was simulated from a commercial batch formula and contained organic dyes, sodium chloride, and copper among its components A selected membrane filtration process generated a permeate with over 99 of the color and copper removed, while 85 of salt by mass and 85 of the original water were reusable The effect of pressure, cross-flow velocity, feed concentration, and membrane fouling on permeate flux also was investigated Subsequent ozonation of several different concentrated retentates each followed first-order reaction kinetics and removed color effectively However, the decolorization rate constant decreased with increasing initial dye color An empirical correlation was established for the apparent first-order rate constant of ozonation and the initial dye concentration The relationship between the apparent rate constant and the dosage of ozone input als
