Treatement of the Wastewater from E-PVC Unit in a Petrochemical Company Using Electrocoagulation Method

Subject Areas : environmental management

Hossein Hosseini ^{1 *} , Ali-Akabr Azemati ² , Mohammad Reza Mousavinia ³

1 - - Assistant Prof., Department of Chemical Engineering, Abadan Branch, Islamic Azad University, Abadan, Iran*(Corresponding Author).
2 - Assistant Prof., Department of Mechanical Engineering, Abadan Branch, Islamic Azad University, Abadan, Iran
3 - Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran.

Received: 2014-11-06 Accepted : 2016-08-10 Published : 2019-03-21

Keywords: Wastewater treatment, E-PVC unit, Electrocoagulation, Surface response, Experimental design,

Abstract :

  Background and Objective: Electrocoagulation is an electrochemical process which is proven to be effective in water and wastewater treatment. In this research study, electrocoagulation method which was based on electron exchange, flocculation and flotation was used for the treatement of wastewater vrom E-PVC unit in Arvand Petrochemical Company. Method: Most of the contaminants from this unit contain suspended solids, dissolved solids and chemical oxygen. In this study, the batch and continuous units of electrocoagulation process were built. The experimental design was carried out by Design Expert 7 software. Findings: Results of the analysis show that density of flow, number of electrodes and PH are the most important parameters. Time and distance between electrodes are less effective than the original parameters listed. In addition, the increased or decreased effect on efficiency of the surface response is evaluated. Results showed that electrocoagulation process could conveniently remove major pollutants from the E-PVC unit. Discussion and Conclusion: The experimental analysis of the wastewater from the E-PVC unit indicate the proper operation of the electrical coagulation process. These results indicate that the electrical coagulation process can easily remove significant pollutants from the wastewater. The function of this process can be expressed as TSS removal: 84-95%, TDS: 51-80%, COD: 80-92%, OD: 80-95%, and TN and TP over 80%.

References:

Reference

1.  Cosgrove, T., 2010. Colloid science: principles, methods and applications, New York: John Wiley & Sons,  pp.45-78.


2. Crittenden, J.C., 2012. MWH's Water Treatment: Principles and Design,  New York: Wiley,  pp.3-45.


3. Bratby, J., 2006. Coagulation and Flocculation in Water and Wastewater Treatment, Frankfurt: IWA Publishing, pp.12-46.


4. Scholz, F., 2009. Electroanalytical methods: guide to experiments and applications, Washington: Springer, pp.2-68.


5. Lakshmanan, D., Clifford, D.A., Samanta, G., 2010. Comparative study of arsenic removal by iron using electrocoagulation and chemical coagulation. Water Research, Vol. 19, pp. 5641-5652.


6. Kabdasli, I., Urguz, L., 2007. Comparison of electrocoagulation, coagulation and the Fenton process for the treatment of reactive dyebath effluent. Water Science & Technology, Vol. 55, pp. 125-134.


7.  Roa-Morales, G., 2007. Aluminum electrocoagulation with peroxide applied to wastewater from pasta and cookie processing,  Separation and Purification Technology, Vol. 54, pp. 124-129.


8. Świetlik, J., 2004. Reactivity of natural organic matter fractions with chlorine dioxide and ozone. Water Research, Vol. 38, pp. 547-558.


9.  Boroski, M., Kromski, M., 2008. The effect of operational parameters on electrocoagulation–flotation process followed by photocatalysis applied to the decontamination of water effluents from cellulose and paper factories. Journal of Hazardous Materials, Vol.160, pp. 135-141.

10.Yu, M., Hi, H., Lee, M., 2005.  Evaluation­ of bipolar electrocoagulation applied to biofiltration for phosphorus  removal. Water Science & Technology, Vol. 51, pp. 231-239.

11.Modirshahla, N., Behnajady, M.A., Mohammadi, S., 2008. Investigation of the effect of different electrodes on the removal efficiency of 4-nitrophenol from aqueous solutions by electrocoagulation, Journal of Hazardous Materials, Vol.154, pp.778-786.