Assessing effectiveness of textile and dyeing wastewater treatment using advanced oxidization methods

Abstract

This study aims to assess the efficiency of treating textile dyeing wastewater using the hydrodynamic cavitation (HC) process with a Vortex reactor. Various independent factors affecting color and COD treatment efficiency in simulated wastewater are evaluated, including pH (2 - 4), treatment time (15 - 45 minutes), and inlet pressure (8 - 10 kg/cm² ). The process is optimized using the Experimental Planning Method with Response Surface Methodology (RSM). Additionally, the study evaluates the treatment efficiency of HC when combined with hydrogen peroxide (H₂O₂ ) and homogeneous Fenton methods. The experimental results indicate that the optimal conditions for treatment are pH 3, a retention time of 30 minutes, and an inlet pressure of 10 kg/cm² . Under these conditions, the color removal efficiency is 22.67%, and the COD removal efficiency is 20.03%. When HC is combined with hydrogen peroxide (H₂O₂), a concentration of 50 mg/L yields the optimum treatment efficiency, resulting in color removal efficiency of 92.62% and COD removal efficiency of 81.78%. Furthermore, combining HC with homogeneous Fenton using H₂O₂ at a concentration of 50 mg/L and a Fenton ratio of 1:10 demonstrates optimal treatment efficiency, with color removal efficiency of 97.59% and COD removal efficiency of 94.8%.