Taguchi Experimental Design Method for the Reuse of Wastewater in Textile Processes

Abstract

Small and medium-sized enterprises (SME) in the textile sector need to take the necessary steps for the reuse of wastewater in a shorter time and at low cost. The Taguchi experimental design method with an L 9 (3 4 ) array was used to determine the optimum operating conditions and the important factors in the reuse of biologically treated textile wastewater using nanofiltration (NF). The signal-to-noise ratios showed that Desal 5DL, 16 bar, 1.5, and 2 L min -1 were the optimum conditions for the factors of NF membrane type, transmembrane pressure, volume reduction factor, and cross-flow rate, respectively. The NF composite meets the water quality for the purposes of use in the dyeing process, the finishing process, and for general use in the production processes.