A Combined Electrocoagulation-Electrooxidation Process for Carwash Wastewater Reclamation

Rubí-Juárez, Humberto; Barrera-Díaz, Carlos; Linares-Hernández, Ivonne; Fall, Cheikh; Bilyeu, Bryan

doi:10.1016/s1452-3981(23)06759-7

Cited by 34 publications

(2 citation statements)

References 28 publications

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“…In a sample of VWSE, the researchers studied the effect of treatment time with the EC process, initial pH value, and electric potential difference on the reduction efficiency of COD index values, which they obtained in the best process condition with the electric potential difference of 30 V, with the treatment time of 30 min, with the pH value of 6.0, and with the reduction of 92.0% of the COD index. Other studies conducted in laboratory-bench reactors under stirring employed in the treatment of VWSE effluent reported an 80.0% reduction in the COD index value at the electric current density of 1.97 mA·cm –2 and at 120 min of treatment and pH 5.0.…”

Section: Recent Applications Of This Technology To the Car Wash Waste...mentioning

confidence: 99%

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Guerreiro Crizel,

Barreto,

Fiori

et al. 2024

ACS EST Water

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Electrocoagulation (EC) is an efficient treatment method that involves the electrodissolution of anodes, the formation of coagulants in situ, and the production of hydrogen at the cathode, facilitating the removal of pollutants by flotation. Industry in general aims to reduce the contaminant load, expressed as chemical oxygen demand (COD), and EC effluent treatment is particularly effective in this process. The development of EC processes has been an efficient alternative for the treatment of effluents with high pollutant loads, such as tannery, pulp and paper, textile, beverage, and food industries, and many demonstrate the potential for application in car wash effluent. This study presents a review of the use of EC for the treatment of various effluents containing COD, OGs, surfactants, color, and turbidity, but with a greater focus on the vehicle washing sector. It also discusses the factors that influence the efficiency of EC and the main discussions of the authors. Presently, the investigations of studies already carried out show that the performance of the EC process is dependent on many relationships and factors, such as the type of material constituting the electrode, the electric potential difference, the electric current density, the distance between electrodes, the surface area of the electrodes, the pH, the initial concentration of contaminants, the conductivity and the treatment time. The review demonstrated that the EC process has been employed in the treatment of many types of effluents and with relatively high efficiency rates, in general, between 60.0% and up to 90.0%, aiming at the reduction of the COD indexes, the reduction from 60.0% up to 99.0% of color content, the 87.0% reduction of chromium. In turn, for turbidity, it varied on average from 44.0 to 99.0%. For other parameters such as MBAS and OGs, in most studies, the reduction exceeded 90.0%.

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Section: Recent Applications Of This Technology To the Car Wash Waste...mentioning

confidence: 99%

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Guerreiro Crizel,

Barreto,

Fiori

et al. 2024

ACS EST Water

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“…Low or no chemical requirements and ease of application make EC and EO the most promising electrochemical treatment methods 36 . Rubí-Juárez et al 37 treated a carwash wastewater, the character of which was very close to GW, by the integrated EC-EO process using Al and boron-doped diamond (BDD) electrodes and reached 82% COD removal.…”

Section: Introductionmentioning

confidence: 99%

Domestic greywater treatment using electrocoagulation-electrooxidation process: optimisation and experimental approaches

Mousazadeh,

Khademi,

Kabdaşlı

et al. 2023

Sci Rep

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A synergistic combination of electrocoagulation-electrooxidation (EC-EO) process was used in the current study to treat domestic greywater. The EC process consisted of an aluminium (Al) anode and an iron (Fe) cathode, and the EO process consisted of titanium with platinum coating mesh (Ti/Pt) as an anode and stainless steel as a cathode. The effect of operative variables, namely current density, pH, EC time and EO time, on the removal of chemical oxygen demand (COD), colour, turbidity, and total organic carbon (TOC) was studied and optimised using Response Surface Methodology (RSM). The results showed that although the pH affected the removal of all studied pollutants, it had more effect on turbidity removal with a contribution of 88.44%, while the current density had the main dominant effect on colour removal with a contribution of 73.59%. It was also found that at optimal operation conditions for a current density of 2.6 A, an initial pH of 4.67, an EC time of 31.67 min, and an EO time of 93.28 min led to a COD, colour, turbidity, and TOC removal rates of 96.1%, 97.5%, 90.9%, and 98%, respectively, which were close to the predicted results. The average operating cost and energy consumption for the removal of COD, colour, turbidity, and TOC were 0.014 $/m3 and 0.01 kWh/kg, 0.083 $/m3 and 0.008 kWh/kg, 0.075 $/m3 and 0.062 kWh/kg, and 0.105 $/m3 and 0.079 kWh/kg, respectively.

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Treatment of Car Washing Unit Wastewater—A Review

Kumar

Chauhan

2018

Water Science and Technology Library

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A Combined Electrocoagulation-Electrooxidation Process for Carwash Wastewater Reclamation

Cited by 34 publications

References 28 publications

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Electrocoagulation Process as a Consolidated Technology in the Treatment of Industrial Effluents and as a Promising Process in the Treatment of Effluents Generated by Car Washes: A Brief Review

Domestic greywater treatment using electrocoagulation-electrooxidation process: optimisation and experimental approaches

Treatment of Car Washing Unit Wastewater—A Review

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