Electrocoagulation technique for refinery wastewater treatment in an internal loop split-plate airlift reactor

Ammar, Saad H.; Ismail, Natheer Nori; Ali, Ali D.; Abbas, Wisam M.

doi:10.1016/j.jece.2019.103489

Cited by 43 publications

(13 citation statements)

References 23 publications

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“…It is observed in studies that the pollutant removal increases as the current density increases [43][44][45][46]. The mechanism of electrocoagulation is shown in Figure 1 below.…”

Section: Electrocoagulationmentioning

confidence: 95%

Removal of Reactive Black 5 from Polluted Solutions by Electrocoagulation: Modelling Experimental Data Using Artificial Neural Networks

Oyar

Eren

Özdemir

2020

Sakarya University Journal of Science

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The wide range of today's industry increases the diversity of pollutants in the wastewater characteristics. In particular, the wastewater of the textile industry is highly colored. Different techniques are used for color removal of dyes from wastewater. In this work, the removal efficiency of the textile dye (Reactive Black 5) at different current densities (48.5 A/m 2 , 97.18 A/m 2 , 194.36 A/m 2 , 291.5 A/m 2 , 388.7 A/m 2) was investigated by electrocoagulation method. The dye concentration of wastewater prepared in the laboratory scale was adjusted to 100 mg/L. Two iron electrodes and 3 g NaCl were used in the electrocoagulation system. The samples which taken periodically were measured after the centrifugal processes with the UV spectrophotometer. The experimental results were also modelled with artificial neural networks (ANNs). As a result of the experiments, approximately 90-100% color removal efficiency was obtained. According to the modelling study, the ANNs can predict the color removal efficiency with coefficient of determination (R 2) between the experimental and predicted output variable reached up to 0.99.

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“…It is observed in studies that the pollutant removal increases as the current density increases [43][44][45][46]. The mechanism of electrocoagulation is shown in Figure 1 below.…”

Section: Electrocoagulationmentioning

confidence: 95%

Removal of Reactive Black 5 from Polluted Solutions by Electrocoagulation: Modelling Experimental Data Using Artificial Neural Networks

Oyar

Eren

Özdemir

2020

Sakarya University Journal of Science

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“…(2 and 4), there was a small influence of τ on the final pH. For an initial pH less than or equal to 8.0, the increase in voltage caused the reduction of OHmolecules, which gave rise to cationic hydroxide species, such as Al(OH) 2+ , Al(OH)2 + , Al2(OH)2 4+ , Al(OH)3 (Saur et al, 1996;Ammar et al, 2019). However, the formation of these compounds can be more accentuated, if the time that the anionic species (OH -) meet with the cationic species (Al 3+ ) is reduced.…”

Section: Influence Of Residence Time and Electrical Potentialmentioning

confidence: 99%

“…Lately, an electrochemical technique has been studied, which although it is still little applied industrially, has aroused a lot of interest due to its simplicity of operation and application in different types of treatment, for example: in textile effluents (Manenti et al, 2014), in waters that show color (Bani-Melhem and Smith, 2012), waters containing pharmaceutical residues (Chou et al, 2011), effluents contaminated with heavy metals (Zhu J et al, 2011), oily effluents (Chavalparit and Ongwandee, 2009;Meneses et al, 2012;Fernandes et al, 2015;Ammar et al, 2019). This is electro flocculation (EF), whose technique is the sum of three sub-processes: coagulation, flotation and electrochemistry (Moussa et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Fernandes¹,

Alexandre²,

Saturno³

et al. 2021

IJAEMS

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This work had as objective the development and analysis of a continuum flow reactor and measure its efficiency in the treatment of residual water of the biodiesel purification process using electro flocculation. The reactor was designed with two interconnected chambers with an 0.2 cm opening between then and reaction volume was 0.883 L and an electrolytic area of 351 cm². The electrodes were all aluminum, which were arranged in parallel and with 0.5 cm spacing, whose power was supplied by a DC source. As design variables, the influence of electrical potential (U) and residence time (τ) on: current density, final pH, removal of oils and greases, COD (Chemical Oxygen Demand), turbidity and total solids, in addition to quantification of the sludge mass obtained and the energy cost of the reactor. The best performance was for a potential of 6.0 volts and a τ of 29.43 min, with 90% removal of oils and greases, 53% COD and 4.38 g of sludge, culminating in an energy consumption ranging from 0.708 kWhm -3 to 4.73 kWhm -3 . In addition, by visual analysis of the formation of bubbles and the removal of turbidity (94%), it was concluded that the division of the reactor in two chambers reduced the secondary contamination of the treated effluent.

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“…With this process, the membrane fouling was reduced, a high steady-state flux and excellent oil removal efficiency were achieved. Ammar, Ismail, Ali, and Abbas (2019) investigated the effectiveness of internal loop split-plate airlift reactor to remove COD/TSS from petroleum refinery wastewater via electrocoagulation. It was found that when the current density raised from 1.8 to 18.5 mA/cm 2 , to remove 90% of the COD required only 16 min (vs. originally 80 min).…”

Section: Chemical Processesmentioning

confidence: 99%

Physico‐chemical processes

Yu¹,

Yao²,

Pan³

et al. 2020

Water Environment Research

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By summarizing 187 relevant research articles published in 2019, the review is focused on the research progress of physicochemical processes for wastewater treatment. This review divides into two sections, physical processes and chemical processes. The physical processes section includes three subsections , that is, adsorption, granular filtration, and dissolved air flotation, whereas the chemical processes section has five subsections , that is, coagulation/flocculation, advanced oxidation processes, electrochemical, capacitive deionization, and ion exchange.

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Electrocoagulation technique for refinery wastewater treatment in an internal loop split-plate airlift reactor

Cited by 43 publications

References 23 publications

Removal of Reactive Black 5 from Polluted Solutions by Electrocoagulation: Modelling Experimental Data Using Artificial Neural Networks

Removal of Reactive Black 5 from Polluted Solutions by Electrocoagulation: Modelling Experimental Data Using Artificial Neural Networks

Performance of a two Chambers Reactor for the Treatment of an Oily Effluent by Electro flocculation

Physico‐chemical processes

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