Comparative study on the treatment of dye wastewater by ozone advanced oxidation technology

Abstract

In view of the difficult selection of ozone treatment process and treatment conditions in the degradation of acid red GR and reactive red X-3B dye wastewater, six different treatment methods were used to treat the wastewater in the experiment, including ozone treatment alone, ozone-coupled micro-electrolysis, ozone-coupled hydrogen peroxide, ozone-coupled ultraviolet (UV), ozone-coupled ultrasonic, metal-catalytic ozone-oxidation treatment. The treatment conditions of the six processes were optimized and the treatment effects of the six processes were compared. The results show that when treating acid red GR dye wastewater, ozone treatment alone has the best removal effect. The chroma removal rate can reach 99.99% after 30min treatment, and the COD removal rate can reach 69.41% after 90 min treatment. When treating reactive red X-3B dye wastewater, ozone-coupled UV oxygen treatment has the best removal effect. The chroma removal rate can reach 99.23% after 30 min treatment, and the COD removal rate can reach 32.83% after 90 min treatment. Ozone advanced oxidation technology can effectively degrade acid red GR and reactive red X-3B dye wastewater, and the chroma removal rate and COD removal rate of the wastewater can be significantly improved by changing the treatment conditions of the process.

Keywords

• ozonation
• coupling
• acid red gr
• reactive red x-3b
• dye wastewater