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:: Volume 6, Issue 2 (3-2019) ::
jehe 2019, 6(2): 149-164 Back to browse issues page
Optimization of US-Electropersulfate Process for Leachate Treatment by Response Surface Methodology
Majid Kermani, Samira Ahmadi, Zahra Shahbazi, Roghayeh Bahadori, Zhila Ghavami, Jamal Mehralipour
Ph.D Candidate of Environmental Health Engineering, Iran University of Medical Sciences, Tehran, Iran
Abstract:   (986 Views)
Introduction: Chemical Oxidation Demand (COD) is an important parameter in treatment of
leachate. Leachate from solid waste has a high pollutants that must be treatment before discharge to
environment. The aim of this study was optimization of US-Electro/persulfate process, predicate of
optimum conditions by RSM for landfill leachate treatment.
Methods and materials: In this experimental study used to sonochemical-reactor with one liter
volume that equipped with 40 KHz and two Iron electrodes as an anode and two Copper electrodes
as a cathode that connected to direct current supply source. In final step of study pH (2-4), S2O82- (1-
2gr/L), direct electrical current (1/5-3 A) and reaction time parameters as an independent parameters
were studied. In optimum condition, corrosion of the electrodes in anode and energy consumption
were measured. Sludge properties before and after the process were analyzed by SEM / EDAX and
FT-IR spectroscopy.
Results: By using this software (design Expert), the optimum condition was done at PH=3/41, S2O82-
dose=1.2 gr, current density=2/41 A, and reaction time were 70 min. In this condition the efficiency
of COD removal was 75 %. The R-squared and Adj R-squared process is 0/78 and 0/88 respectively.
The electrodes corrosion in optimum condition were 0.77 gr and energy consumption was 9/23
KW/kg COD. The results of analysis indicate that change in sludge during the process happened and
elements structure in leachate has observed, the most obvious oxygen and iron increase in sludge after
the process.
Conclusion: The US-Electro/persulfate has a good efficiency in COD removal and with this model
can be tested with a few run and high accuracy to optimize the process.
Keywords: Optimization, US-EPS, Leachate treatment, Landfill, Response surface methodology
Full-Text [PDF 623 kb]   (379 Downloads)    
Type of Study: Research | Subject: Special
Received: 2019/03/18 | Accepted: 2019/03/18 | Published: 2019/03/18
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Kermani M, Ahmadi S, Shahbazi Z, Bahadori R, Ghavami Z, Mehralipour J. Optimization of US-Electropersulfate Process for Leachate Treatment by Response Surface Methodology. jehe. 2019; 6 (2) :149-164
URL: http://jehe.abzums.ac.ir/article-1-610-en.html

Volume 6, Issue 2 (3-2019) Back to browse issues page
مجله مهندسی بهداشت محیط Journal of Environmental Health Enginering
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