| Biography | |
|---|---|
 Prof. BITA AYATI Tarbiat Modares University, Iran |
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| Title: Use of Electro-Fenton Process for Treating Petroleum Wastewater | |
| Abstract: Petroleum industry is the most important industry in Iran. The wastewater generated in different units would include many various compounds depending on reactions complexity and refined materials. Application of electrochemical reactors, electro-flotation, adsorption, microwave-assisted oxidation and biological methods for treatment of petroleum wastewater encounters with different operational issues and problems like incomplete remediation and sidelong generation of toxic compounds. Moreover, biological treatment methods used for industrial wastewater treatment are usually less robust systems in comparison to electrochemical methods with special regards to toxicity usually found in petroleum wastewater and the risk of odor problems exists as well. Advanced oxidation treatment methods have drawn great attention for their great potential in different industrial wastewater treatment. Hydroxyl radical is produced in all advanced oxidation processes, and although unselective this radical is able to degrade organics in a short time. H2O2 and ferrous ions released by iron electrodes corrosion are used to generate hydroxyl radicals in Electro-Fenton method. In this study, treatment of a 750 mL petroleum wastewater sample was evaluated using a sequential hybrid system which was consisted of Electro-Fenton and NZVI slurry reactors. In both systems, effective parameters were optimized by OFAT method considering energy consumption and treatment efficiency. As for the slurry reactor, nanoparticles were first synthesized and then used in the reactor to treat the wastewater. Both systems were first optimized separately and the hybrid complex was designed considering the sub-systems optimum conditions. As for the Electro-Fenton reactor, COD removal efficiency of 92.78% was achieved in 75 minutes while initial pH and current were equal to 3 and 0.5 A respectively. Moreover, COD removal efficiency in slurry reactor was 86.94% which was achieved in 60 minutes once having 0.1 g/L of NZVI concentration and neutral initial pH as components of their optimum parametric condition. In the hybrid system, COD removal efficiency of 93.46% was achieved in only 47 minutes. Energy consumption in hybrid system for achieving the mentioned efficiency was 12.672 KJ which was 40% less than that of single Electro-Fenton system. Keywords: advance oxidation; electro-Fenton; petroleum wastewater; energy consumption | |
| Biography: Dr. Bita Ayati is the Associate Professor in Environmental Engineering Division of the Civil and Environmental Engineering Faculty at Tarbiat Modares University, Tehran, Iran. She received her Ph.D. in Environmental Engineering from Tarbiat Modares University in 2005, M.Sc. in Environmental Engineering in 1998 and B.Sc. in Chemical Engineering in 1996, both from Sharif University of Technology in Tehran, Iran. Dr. Ayati’s recent research interests include hard-biodegradable industrial and hazardous wastewater treatment especially using new methods including nano technology and advanced biological systems. She supervised 7 Ph.D. and more than 40 M.Sc. students. She is the author of the book entitled: “Application of Moving Bed Biofilm Reactor (MBBR) in Sanitary & Industrial Wastewater Treatment”. She has published over 140 papers in national and international journals and conference proceedings. She has obtained 15 scientific award including Young Scientist Awards from Man and Biosphere (MAB), UNESCO in 2002. | |
