Organics removal in oily bilgewater by electrocoagulation process

Asselin, Mélanie; Drogui, Patrick; Brar, Satinder Kaur; Benmoussa, H.; Blais, Jean-François

doi:10.1016/j.jhazmat.2007.06.008

Cited by 138 publications

(48 citation statements)

References 17 publications

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“…4. According to Asselin's results in Table 2 (Asselin et al 2008), it can be concluded that by using aluminum electrode in the present study at the same current and less time, higher removal efficiency, less sludge production and consumption of energy have achieved. , but in the present study, higher removal rate in less time and less current density have been achieved (El-Naas et al 2009).…”

Section: Determination Of Hydrocarbon Typesmentioning

confidence: 52%

Electrocoagulation for COD and diesel removal from oily wastewater

Safari

Aghdam

Kariminia

2015

Int. J. Environ. Sci. Technol.

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This study investigated the diesel and COD removal from oily wastewater by electrocoagulation. Experiments were conducted in a 2-l reactor using aluminum and iron electrodes. Effects of different parameters including pH (3-11), time (10-60 min), voltage (4.5-10.5 V), supporting electrolyte (NaCl concentration), electrode material and initial diesel concentration (3500-11,000 mg/L) were studied in order to evaluate the efficiency of electrocoagulation. Furthermore, the consumption of energy and the amount of sludge produced by this method were evaluated. The highest removal efficiency (COD removal of 99.1 ± 0.2 % and diesel removal of 98.8 ± 0.2 %) was observed under the following conditions: pH 7, 40 min, 10.5 V, NaCl concentration of 0.5 g/ L, diesel concentration of 3500 mg/L. The consumption of energy was estimated to be 6.47 kWh/m 3 , and the amount of sludge generated was 1995 mg/L. The results demonstrated that the electrocoagulation is a feasible technique for treatment of heavily contaminated petroleum refinery wastewater.

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Section: Determination Of Hydrocarbon Typesmentioning

confidence: 52%

Electrocoagulation for COD and diesel removal from oily wastewater

Safari

Aghdam

Kariminia

2015

Int. J. Environ. Sci. Technol.

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“…In recent years, electrocoagulation (EC) of synthetic or real oily water has been investigated by some researchers (Ruback and Saur, 1997;Dórea et al, 2007;Tir and Mostefa, 2008;Canizares et al, 2007;Benzadok et al, 2008;Asselin et al, 2008;Abdelwahaba et al, 2009;Ramalho et al, 2010;Lima et al, 2009;Cerqueira et al, 2011). During electrolysis, four main mechanisms generally occur simultaneously: (a) electrolytic reactions at the electrode surfaces, (b) formation of coagulant agents in the aqueous phase, (c) adsorption of soluble or colloidal pollutants by these agents and (d) removal by sedimentation or flotation.…”

Section: Introductionmentioning

confidence: 99%

Effects of direct and alternating current on the treatment of oily water in an electroflocculation process

Cerqueira

Souza

Marques

2014

Braz. J. Chem. Eng.

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-In the direct current mode (DC), widely used in electroflocculation (EC), the formation of an impermeable oxide layer on the cathode causes the declining of the efficiency of this process. This disadvantage has been reduced by adopting alternating current (AC). In this study, the effects of AC and DC on operational parameters such as the removal of oils and greases (O&G), color and turbidity from oil-inwater (O/W) emulsions of the petroleum industry using aluminum electrodes were investigated. Removal efficiencies of 95%, 97% and 99% of O&G, color and turbidity with energy consumption of 0.280 kWh/m 3 and electrode consumption of 0.12 g and 0.18 g were achieved at a current density of 3 A, operation time of 3 minutes and initial pH of 9.0 using AC and DC, respectively. In continuous flow tests performed with the same experimental conditions, the electrode consumption at times up to 60 minutes were 1.6 g and 3.4 g using AC and DC, respectively.

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“…The process was evaluated in laboratory scale and involved the use of two types of electrodes (iron and aluminum). The results showed that the best performance was obtained using the iron electrode [60].…”

Section: Electrolytic Processes Applied To the Treatment Of Oily Wastmentioning

confidence: 99%