Detoxification of olive mill wastewater by electrocoagulation and sedimentation processes

Khoufi, Sonia; Feki, Firas; Sayadi, Sami

doi:10.1016/j.jhazmat.2006.07.053

Cited by 127 publications

(55 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The EC is a technology that has been effectively used to treat industrial wastewater containing different pollutants such as arsenic, phosphate, boron, dyes and viruses. Furthermore, it has been effective in breaking oil emulsions in water and treating paper mill effluent, olive mill effluent, landfill leachate and dairy effluent (Bensadok et al 2008;Irdemez et al 2006;Katal and Pahlavanzadeh 2011;Khoufi et al 2007;Li et al 2011;Azadi Aghdam et al 2015;Phalakornkule et al 2010;Sengil and Ozacar 2006;Tchamango et al 2010;Wan et al 2011;Yilmaz et al 2008;Zhu et al 2005;Amani-Ghadim et al 2013).…”

Section: Electrocoagulationmentioning

confidence: 99%

Electrocoagulation for COD and diesel removal from oily wastewater

Safari

Aghdam

Kariminia

2015

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

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.

show abstract

Section: Electrocoagulationmentioning

confidence: 99%

Electrocoagulation for COD and diesel removal from oily wastewater

Safari

Aghdam

Kariminia

2015

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Electroflotation, electrodeposition and electrocoagulation are important techniques (Yang, 2007;Rangel et al, 2013). In recent years, there has been increased interest in the application of electrocoagulation in the treatment and purification of industrial wastewater (Khoufi et al, 2007;Chaturvedi, 2013). Electrocoagulation is a wastewater treatment process involving the generation of coagulants in situ by the dissolution of metal ions electrochemically from the anode with the simultaneous formation of hydroxyl ions and hydrogen gas at the cathode.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Electrocoagulation Treatment Technique for the Separation of Oil from Wastewater

Fadali¹,

Ebrahiem²,

Gamil³

et al. 2015

J. of Environmental Science and Technology

View full text Add to dashboard Cite

Oily wastewater represents a dangerous threat when discharged to receiving bodies. This research investigates electrocoagulation as a simple, effective and economic technique for treatment of such wastewater. Bench scale reactors were used to evaluate the factors that may affect the treatment of a wastewater obtained from Kuwait Gulf Oil Company. Aluminum was used as a sacrificial anode. Electrodes were arranged at different configurations (horizontal, vertical and vertical anode with horizontal cathode) to select the optimal one. Other tested operation parameters include time of treatment, current density, the distance between the electrodes, anode tubes diameters and the electrolyte concentration of the emulsion. The treatment efficiency was evaluated by comparing the initial and final turbidity of the treated wastewater. Experimental results indicate that the efficiency of oil separation increased with the increase of the treatment time, current density, anode diameter and concentration of electrolyte. However, it decreased with the increase of distance between electrodes. The horizontal arrangement gave the best results. The data shows that oil separation increases slightly with increasing temperature. The optimum time and current density for oil separation was determined as 30 min and 30 mA cmG 2 , respectively. These parameters reduced the turbidity of the wastewater from 95-5 NTU.

show abstract

“…Boukhoubza et al (2009) removeram 60% dos polifenóis da água residuária do processamento de oliva, cuja concentração inicial média era de 2.080 mg L -1 , ao adicionarem 1% de cal, na relação peso/volume. Ao tratarem água residuária do processamento de oliva com cal, Khoufi et al (2007) reportaram redução de cerca de 50% da toxicidade, atribuída à remoção de compostos fenólicos.…”

Section: Methodsunclassified

Desempenho de sistemas alagados no tratamento de águas residuárias do processamento dos frutos do cafeeiro

Fia

Matos²,

Queiroz³

et al. 2010

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

RESUMONove sistemas alagados (SACESHs) foram construídos em escala piloto (1,5 m de comprimento, 0,5 de largura e 0,4 m de profundidade), cultivados com Typha sp. e Alternanthera phyloxeroides, e operados sob diferentes taxas de aplicação orgânica, no tratamento da água residuária do processamento dos frutos do cafeeiro (ARC). Três sistemas receberam ARC sem nenhum pré-tratamento, em três foi aplicada ARC com correção de pH e correção nutricional e nos três últimos os efluentes de filtros anaeróbios utilizados no tratamento da ARC, que teve o pH e o teor de nutrientes corrigidos. Os resultados mostraram que o aumento nas taxas de carga superficial dos constituintes da ARC no sistema proporcionou decréscimo na eficiência de remoção de matéria orgânica e compostos fenólicos, em todos os SACESHs avaliados. Os tempos de detenção hidráulica superiores a 100 h proporcionaram maiores eficiências na remoção de DQO (SAC Performance of constructed wetlands used in the treatment of wastewater of coffee processing ABSTRACT Nine constructed wetlands (SACESHs) were built on a pilot scale (1.5 m long, 0.5 wide and 0.4 m deep), grown with Typha sp. and Alternanthera phyloxeroides, and operated under different organic loads in the treatment of wastewater of coffee processing (ARC). Three systems received no ARC pre-treatment, three received ARC with correction of pH and nutritional correction, and the last three received the effluent of filters used in the anaerobic treatment of ARC that had the pH and nutrient content corrected. The results showed that the increase in the rate of surface charge of the constituents of the ARC provided the decrease in efficiency of removal of all SACESHs evaluated. The hydraulic detention time of more than 100 h provided higher efficiencies in the removal of COD (SAC , showed a satisfactory performance with regard to the removal of BOD (63%), COD (85%) and phenolic compounds (65%).

show abstract

Detoxification of olive mill wastewater by electrocoagulation and sedimentation processes

Cited by 127 publications

References 41 publications

Electrocoagulation for COD and diesel removal from oily wastewater

Electrocoagulation for COD and diesel removal from oily wastewater

Investigation of the Electrocoagulation Treatment Technique for the Separation of Oil from Wastewater

Desempenho de sistemas alagados no tratamento de águas residuárias do processamento dos frutos do cafeeiro

Contact Info

Product

Resources

About