Wastewater Treatment by Ozone

Abstract

Reactive Red 195 (RR195) and Acid Yellow 23 (AY23) synthetic textile dye bath effluent were treated with ozonation process. The operating parameters are Dye concentration, Ozone flowrate, Agitation provide in reactor. pH is maintained 7 ± 0.5 almost same in all experiments. Experiments were evaluated to find the optimum conditions for the ozonation processes. Ozone is mainly used in the Advanced Oxidation Processes (AOP’s) refers to a set of chemical treatment procedures designed to remove organic and inorganic materials in dye industry wastewater by ozonation process. According to decolorization efficiency it can be inferred that effect of OH• radical present in the synthetic dye bath as well as radical formation promoter (e.g. OH−) was probably hidden due to complexity of the synthetic dye bath matrix. The contaminant materials are converted to a large extent into stable inorganic compounds such as water, carbon dioxide and salts, i.e. they undergo mineralization. The effect of ozonation on the Decolorization, Degradation, and Mineralization of a dye (Acid yellow 23 and Reactive Red 195), perform in a laboratory scale bubble column batch reactor. In Experiment Decolorization, Chemical Oxygen Demand (COD), Total Organic Carbon (TOC), Ozone Demand was analysed. The effect of operational parameters on decolorization such as ozone dosage and dye concentration is study. The present study demonstrated that nearly completely decolorization of Acid yellow 23 and Reactive Red 195 could be accomplished by ozonation. The time required for the complete decolorization gradually increase with increase in the initial dye concentration. The COD removal efficiency gradually increased with an increase in the initial concentration of dye solution. The TOC removal efficiency gradually increased with an increase in the initial concentration of dye solution. The ozone demand is gradually increased with an increase in the initial concentration of dye solution. The cost for removal of COD using ozone vary from 1.5 to 3.5 Rs./lit.