Mehdi Ghorbanian; Seyyed Gholamreza Mosavi; Zeynab Hosseini
Volume 22, Issue 1 , March and April 2015, , Pages 7-16
Abstract
Background: Removal of turbidity is essential due to its hygienic, environmental and aesthetics effects. Therefore, this study aimed to determine electrocoagulation efficiency in high seasonal turbidity.
Materials and Methods: This experimental study was conducted in bench scale. The electrochemical ...
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Background: Removal of turbidity is essential due to its hygienic, environmental and aesthetics effects. Therefore, this study aimed to determine electrocoagulation efficiency in high seasonal turbidity.
Materials and Methods: This experimental study was conducted in bench scale. The electrochemical reactor was consist of cylindrical glass column having an internal diameter of 5 cm and a height of 51 cm and operated in the batch mode. Two sheets of aluminum spaced 2 cm apart were installed in the cell’s electrodes. The studied parameters was current density, reaction time and initial turbidity.
Results: Turbidity removal increased by reaction time, initial turbidity and current density. Regarding amount of produced sludge and economic aspects, reaction time of 2 min and current density of 3 mA/cm2 were selected as optimum conditions.
Conclusion: Results of present work indicated that the electrocoagulation process is capable to reduce high concentration of turbidity to permissible standard levels efficiently.
Farshid Ghanbari; Ashraf Mazaheri; Fayyaz Mahdi pour; Simin dokht Mir Shafieyan; Mahsa Moradi; Hajar Sharifi Malek sara
Volume 20, Issue 5 , March and April 2014, , Pages 716-725
Abstract
Background: Colored wastewaters are major source of aquatic pollution which will cause considerable impacts to the environment if discharge without treatment. In recent years, Electrocoagulation (EC) process has been attracted a great attention for treatment of industrial wastewaters as an appropriate ...
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Background: Colored wastewaters are major source of aquatic pollution which will cause considerable impacts to the environment if discharge without treatment. In recent years, Electrocoagulation (EC) process has been attracted a great attention for treatment of industrial wastewaters as an appropriate method.In this study, the efficiency of electrocoagulation process on color removal of natural dyeing wastewater was investigated.
Material and Methods: This study experimentally was run in a batch electrochemical reactor consisting of a 0.6 L glass beaker, two anodes and two cathodes. The anodesand the cathodeswere made of aluminumand iron or copper respectively which installed in parallel. In each of test, 400mLof wastewater add into the reactor , then effect of three parameters including the current (50-500mA), reaction time (5-40 min) and the pH of wastewater (pH=4-8) on process performance were investigated.
Results:Theresults showed that optimal conditions for Al/Cu and Al/Fe systems was in 400 mA applied current, pH of 4 and 40 minutes. In these conditions, EC with Al/Cu electrodes were capableto remove of almost complete color (98%) and efficiency of COD removal was 28 %, whereas EC with Al/Fe resulted in 97% color removal and 21% COD reduction. Electrical energy consumption and current efficiency of EC process for optimal condition werefound 2.9kWhm-3 and 110% respectively.
Conclusion:According to our finding,it proposed that EC process is very efficient and economic process for color removalfrom wastewater.