Olive oil mill wastewater treatment by means of electro-coagulation

İnan, Hatice; Димогло, А. С.; Simsek, Halis; Karpuzcu, Mehmet

doi:10.1016/s1383-5866(03)00148-5

Cited by 307 publications

(161 citation statements)

References 25 publications

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“…This research showed that the removal efficiency of COD increased irrespective of electrode types with increasing applied voltage potentials (5, 10 and 15 V) and treatment times. Other researchers (Bensadok et al, 2011;Inan et al, 2004;Laridi et al, 2005;Merzouk et al, 2011;Rivera et al, 2009) also reported that at a particular voltage, removal of COD increased with increased process/treatment time. …”

Section: Chemical Oxygen Demand (Cod) Changementioning

confidence: 90%

Remediation of Feedlot Nutrients Runoff by Electrocoagulation Process

Thapa¹,

Rahman²,

Borhan³

2015

American Journal of Environmental Sciences

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Nutrient runoff from Concentrated Animal Feeding Operations (CAFOs) may cause ground and surface water pollution. Scientists and researchers are continually searching for appropriate technologies to mitigate feedlot nutrient runoff pollution. In this study, suitability of electrocoagulation treatment process was examined under laboratory conditions to mitigate nutrient pollutants from the feedlot runoff. Feedlot runoff was treated with three different type of electrodes such as aluminum (Al-Al), iron (Fe-Fe) and hybrid (Al-Fe) at different electrical voltage potentials (5, 10 and 15 Volts) for a designated time step (up to 30 min). The electrocoagulation cell consisted of two parallel rectangular plate electrodes, immersed in a beaker with 500 mL feedlot runoff and powered by a Direct Current (DC) supply. This study was conducted in batches at room temperature. Results indicated that Electrical Conductivity (EC), Total Phosphorus (TP), Total Nitrogen (TN) and Chemical Oxygen Demand (COD) concentration reduced significantly irrespective of electrode types. Overall, TP concentration reduction was higher (100%) followed by COD (50-75%) and TN (25-60%) concentration. Nutrient removal and specific electrical energy consumption increased with increasing voltage level. Aluminum electrodes were more effective than the other two electrodes for TP reduction at all applied potentials and COD reduction was better at lower applied potential. Hybrid electrodes (Al-Fe) reduced TN better than the other two electrodes.

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Section: Chemical Oxygen Demand (Cod) Changementioning

confidence: 90%

Remediation of Feedlot Nutrients Runoff by Electrocoagulation Process

Thapa¹,

Rahman²,

Borhan³

2015

American Journal of Environmental Sciences

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“…In a neutral and slightly acidic solution (treating medium), Aluminum (Al-Al) based electrodes performed better in removing COD than that of Iron (Fe-Fe) electrodes. In contrast, iron based electrodes performed better in alkaline solutions (Inan et al, 2004;Kobya et al, 2003).…”

Section: Discussionmentioning

confidence: 86%

“…The decrease in EC contents during electrolysis was possibly due to the loss of electrolyte ions in the wastewater, transformation of chlorine ion into chlorine gas after playing the role of electron donor and after converting anodically to chlorine which is further converted to hypochlorous acid in the aqueous solution (Costaz et al, 1983;Krstajić et al, 1987). A pH 6.0 is optimal for both Al and Fe based electrodes (Inan et al, 2004). In a neutral and slightly acidic solution (treating medium), Aluminum (Al-Al) based electrodes performed better in removing COD than that of Iron (Fe-Fe) electrodes.…”

Section: Discussionmentioning

confidence: 99%

ELECTROLYSIS OF SWINE MANURE EFFLUENTS USING THREE DIFFERENT ELECTRODES Fe-Fe, Al-Al AND Fe-Al

Rahman

Borhan

2014

American Journal of Agricultural and Biological Sciences

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Swine effluent with high organic strength need to be treated to make it suitable for applying to crop/pasture fields, or discharging to any waterways. Electrocoagulation is a relatively simpler and cheaper technique over biological and chemical treatment methods currently used to treat high-strength industrial and municipal wastewater. The performance of an electrocoagulation system mainly depends on the pH, Electrical Conductivity (EC) of the medium, Chemical Oxygen Demand (COD) loading rates and catalytic activity of the electrodes used. In this research, a study was conducted to compare the pollutant removal efficiencies of three electrodes (Fe-Fe, Al-Al and Fe-Al) with three electric current levels (500, 1000 and 2000 mA) while treating swine manure effluents. The electrochemical cell consisted of two parallel rectangular plates (90×25×1.5 mm) of Iron (Fe-Fe), Aluminum (Al-Al) and Iron-Aluminum (Fe-Al, later on described as hybrid) electrodes; immersed in a beaker with 550 mL swine effluents and powered by a Direct Current (DC) supply. All studies were conducted in batches at room temperature. In general, removal efficiencies were increased with increasing current densities and electrolysis times for electrodes evaluated. Aluminum electrodes outperformed iron and hybrid (iron-aluminum electrodes) in removing Total Phosphorus (TP) at all current density levels tested. Overall, use of hybrid electrodes resulted in better COD removal. For the same treatment times (1200 s) at higher current density (21 mA cm −2 ), hybrid electrodes removed about 100% COD, which are about 1.9 and 1.3 times higher than those of aluminum and iron electrodes, respectively. Iron electrodes showed the highest removal efficiency (85%) for Total Organic Carbon (TOC) at 21 mA cm −2 current density and 1200 s treatment time. Overall, lower Specific Electrical Energy Consumptions (SEECs) per kg of Pollutants (TP, COD and TOC) were estimated for the aluminum electrodes than the other electrodes combination.

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“…L'évolution de la concentration résiduelle de DCO en fonction du temps est utile à la détermination des conditions optimales de traitement en matière de coût et INAN et al, 2004;TEZCAN et al, 2006) et un volume de 100 mL.…”

Section: Traitement éLectrolytique Des Eaux Usées Issues D'industriesunclassified

Traitement des margines par électrocoagulation avec des électrodes plates en aluminium

Hanafi

Sadif

Assobhei

et al. 2009

rseau

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Cet article est diffusé et préservé par Érudit. , la réduction des orthophosphates est 94-99 %, la réduction de l'ammonium est 80-85 %,la réduction du zinc -3 . Ces niveaux opérationnels optimaux permettent d'avoir une bonne dégradation des margines.Traitement des margines par électrocoagulation 474 est 70-75 %, la réduction du fer est 71-76 %, la masse perdue des électrodes est 0,6-0,7 kg•m -3 et l'énergie consommée est 12-14 kWh•mMots clés : Margine, caractérisation, électrocoagulation, électrodes en aluminium, décoloration, DCO, polyphénols. ABSTRACTOlive mill wastewater (OMWW) generated by the olive oil extraction process is the main waste product of this industry. These effluents have been characterized, followed by an experimental study of the elimination of organic matter (chemical oxygen demand (COD), phenolic compounds, suspended solids (SS) and colour), mineral matter (phosphate and ammonium nitrogen) and heavy metals (zinc and iron) using an electrocoagulation technique with aluminum electrodes. It was found that an increase in electrolysis time and voltage improved treatment significantly. However, a simultaneous increase in electrode and energy consumption was observed.The results of these analyses showed that the olive mill wastewater (OMWW) effluent, diluted five times, is acidic (pH 4.2), has a very high organic matter concentration , the reduction of orthophosphates was 94-99% and the reduction of ammonium was 80-85%. The reduction of zinc was 70-75%, the reduction of iron was 71-76%, the electrode consumption was 0.6-0.7 kg•m -3 and the amount of energy consumed was [12][13][14] . Under these optimal operational conditions, acceptable degradation of the OMWW was achieved.

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Olive oil mill wastewater treatment by means of electro-coagulation

Cited by 307 publications

References 25 publications

Remediation of Feedlot Nutrients Runoff by Electrocoagulation Process

Remediation of Feedlot Nutrients Runoff by Electrocoagulation Process

ELECTROLYSIS OF SWINE MANURE EFFLUENTS USING THREE DIFFERENT ELECTRODES Fe-Fe, Al-Al AND Fe-Al

Traitement des margines par électrocoagulation avec des électrodes plates en aluminium

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