Decontamination of oilfield produced water containing petroleum hydrocarbons by high flow rate bioelectrocoagualtionsystem.

Authors

Environmental biotechnology department, Genetic engineering and biotechnology research institute (GEBRI), University of Sadat city, Egypt.

Abstract

It is of critical importance in case of oilfield produced water (PW) treatment designing what the composition of constituents of target water and how the degradation should be observed as efficiently as possible. Total petroleum hydrocarbons (TPH) and other pollutants, such as heavy metals, and dissolved/suspended solids are generally occurring in PW. This study presents the hybrid system to stimulate the suitable conditions withhigh flow rate electrocoagulationbiodegradation ofPW.The efficiency of a bioelectrocoagualtion (BEC)system for the continuous removal of TPH and sulfur compounds from PW has many problems. Treatment conditions were changed to overcome the formation of hydrogen sulfide as a reduced form of sulfate. This study observed the results of lab scale hybrid system setup with electrocoagulation and biodegradation. The initial removal rate of TPH was partially enhanced at detention time, current densities and electrolytes modifications and the same trend for sulfide formation rate.Collectively, the results of this study confirmed that sulfate converted to sulfide taking place within the electrochemical zone. The maximum TPH, sulfate and COD removal efficiency was achieved 75%, 25.3% and 22.3, respectively when the detention time was about 5L/hour. Also, the results indicated that the flow rate is very important to keep the balance between current density and more TPH removalof high saline water in the hybrid system.
 
 

Keywords

Journal of Scientific Research in Science
Volume 33, part1
September 2016
Pages 104-116

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