COD REMOVAL FROM SYNTHETIC WASTEWATER CONTAINING AZITHROMYCIN USING FLUIDIZED BED FENTON PROCESS

Environmental Engineering

NATIONAL CONFERENCE ON TECHNOLOGICAL ADVANCEMENTS IN ENGINEERING

ABSTRACT Advanced oxidation process (AOPs) are low cost, high efficiency and ecofriendly method in the degration of toxic pollutants in waste water using hydroxyl radical for oxidation. The hydroxyl radical has a high oxidation potential and is able to react with practically all classes of organic compounds, resulting in complete mineralization of these compounds, that is, the formation of carbon dioxide, water and inorganic salts, or their conversion into less aggressive products. Some of the most popular AOPs are TiO2 photocatalysis advanced ozonolysis, electrochemical oxidation , Fenton’s reaction and Fenton/ultrasonic reaction. Among different AOPs Fenton process is found to be effective in degrading the organic and inorganic contaminants present in water. One of the main disadvantage of Fenton process is sludge formation. It requires further treatment before disposal. The Fluidized Bed Fenton(FBF) process uses carriers that reduces the production of sludge by crystalizing the pollutant onto the carrier surface. In this study, the Chemical oxygen demand (COD) removal from synthetic wastewater by FBF process has been investigated. The synthetic wastewater used for conducting the experiments in this study was produced by dissolving 0.5 g Azithromycin in 1000 ml distilled water.The chemical formula of Azithromycin antibiotic is C38H69NO13.The various parameters affecting fluidized bed Fenton process are pH,H2O2 concentration,Fe ion concentration. Another factor affecting fluidized bed Fenton process are the carriers. Carriers are solid particles provide the surface area for the crystallization of the iron sludge, which will remain in the solid phase as iron oxide. The presence of the solid particles promotes the iron onto the carrier surface. Thus, the crystallization competes with the floccules and sludge formation of iron hydroxides. In this study Alumininium dioxide is the carrier used for fluidization. The effect of pH, H2O2concentration, Fe2+ concentration for FBF process is studied. A removal efficiency of 92% was achieved after 1hr of fluidization under optimum condition of pH = 4, [Fe2+]=10mM, [H2O2]=20mM.

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