Suggestion and Feasibility of Appropriate Treatment Methods for the Removal of Sulfate and Organic Matter From Petrochemical Wastewater Effluent- a Case Study



Ali Behzadfar M¹ ; Mohammadi S¹ ; Araghi MT¹ ; Shirdam R¹ ; Ghaffari HR^{2, 3} Show Affiliations
Source: International Journal of Pharmacy and Technology Published:2016

Abstract

There are many petrochemical industry in Iran which paying attention to the output wastewater effluent of them have a great importance, because the chemical industry’s wastewater have a potential for contaminating the environment. This study first evaluated the output wastewater effluent quality of a petrochemical in south of Iran and then assessed the effluent quality in terms of chemical and physical parameters with the discharge standards of surface water (as an acceptor resource) and eventually for parameters with unacceptable limit (more than the standards). Appropriate treatment method would presented in order to reduce the unacceptable parameters to an acceptable limit. For conducting this study, the sampling have done during six month and the taken samples were evaluated for 13 physical and chemical parameters based on the standard method. The results showed that among the evaluated parameters, the BOD5, COD and sulfate level in output wastewater effluent of petrochemical faced with troubles for discharging into the sea water, because their level were higher than the determined standard level. For reducing the parameters level which were more than the standard limit, various methods have been presented. The methods presented based on the efficiency, functionality and economic cost. Based on the obtained results, the three-step reconciliation process (electrocoagulation→ anaerobic process ABR→ anaerobic activated sludge process with extended aeration) have presented as a final suggestion. The aim of the mentioned final method was based on the fact that the electrocoagulation was consider for SO4 reduction andanaerobic ABR process used for more reduction of COD+ SO4 and eventually aerobic process (activated sludge with extended aeration) was used for more reduction of SO4, COD and BOD. © 2016, International Journal of Pharmacy and Technology. All rights reserved.