Treatment and operating cost analysis of metalworking wastewaters by a continuous electrocoagulation reactor

Kobya, Mehmet; Omwene, Philip Isaac; Ukundimana, Zubeda

doi:10.1016/j.jece.2019.103526

Cited by 34 publications

(6 citation statements)

References 25 publications

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“…To evaluate the predictive model condition, the experiments were performed in triplicate and found 78.23 ± 0.38 (%) of COD removal and 1.418 ± 0.0036 kWh/m 3 . The operating cost is calculated based on energy consumptions and electrode consumptions as the main costs, and it was found to be $ 0.59/m 3 which is less than that reported in literatures (Kermet‐Said & Moulai‐Mostefa, 2015; Kobya, Omwene, & Ukundimana, 2020; Palanisamy et al, 2020).…”

Section: Resultsmentioning

confidence: 73%

Optimization of pharmaceutical wastewater treatment by electrocoagulation and dual coagulation

Perumalsamy

Chithra

Ajith

et al. 2022

Water & Environment J

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The present study compares the treatment of pharmaceutical industry wastewater (PIWW) by coagulation‐flocculation (C‐F) and electrocoagulation (EC) techniques using response surface methodology (RSM). EC was performed with waste food‐grade Aluminium (Al) foil as a sacrificial anode. In C‐F, to minimize chemical usage, dual coagulants Aloe vera (organic) and ferric chloride (chemical) were used. Optimization using RSM for C‐F showed chemical oxygen demand (COD) reduction of 60.25 ± 0.28% at optimum operating conditions with R2 = 0.964 and adj‐R2 = 0.928, whereas EC resulted in COD reduction of 78.23 ± 0.38% and energy consumption 1.498 ± 0.0076kWh/m3 with R2 = 0.978 and adj‐R2 = 0.956. The result showed that the use of food‐grade waste Al foil as anode electrode (in EC) and the use of dual coagulant (in C‐F) can reduce COD from industrial effluent efficiently contributing to less hazardous sludge generation.

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Section: Resultsmentioning

confidence: 73%

Optimization of pharmaceutical wastewater treatment by electrocoagulation and dual coagulation

Perumalsamy

Chithra

Ajith

et al. 2022

Water & Environment J

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“…All of these actions suppose an electrolytic oxidation by in situ generation of coagulants and a sacrificial anode. The reactions of this process can be divided into the following steps: 13,16,38 • Release of metal ions from the sacrificial anode (through establishing electricity between electrodes).…”

Section: Resultsmentioning

confidence: 99%

“…Evaluating the feasibility of the process is crucial, yet only a limited number of studies have addressed the economic aspect of the EC technique. 16,17 Diverse scenarios involving the removal of a wide range of dyes, including monoazo, diazo, or polyazo types, have demonstrated the consistent superiority of electrocoagulation (EC) over traditional methods. Notable examples include situations such as Acid Yellow 220 and Acid Black 52, 18 Acid Green Dye 50 19 or Blue Reactive, Red Disperse and mixed dyes.…”

mentioning

confidence: 99%

Modeling Strategies Based on Multiple Neural Network Systems Applied for a Monopolar and Bipolar Electrocoagulation

Piuleac,

Godini,

Rahimi

et al. 2023

J. Electrochem. Soc.

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The objective of this research was to evaluate the efficiency of an electrocoagulation system using iron and aluminum electrodes, arranged in both monopolar and bipolar arrangements, for the removal of acid red 18 dye. Experimental and modeling approaches were employed to investigate the system's performance. The effects of operating parameters, including initial pH (3-9), current density (0.4-5.6 mA/cm²), charge passed (2.16-21.6 C/cm²), and initial dye concentration (50-300 mg/L) were studied. The results demonstrated that an increase in electric current intensity and passed charge enhanced the removal of COD and dye. However, to minimize energy consumption, these parameters were optimized for different dye concentrations. The monopolar arrangement exhibited favorable performance for the both electrodes, primarily due to reduced ohmic drop effect, although the iron electrode generated sludge with better settling characteristics. The monopolar iron electrode consumed the least energy (38.3 kWh/kg COD). Experimental evaluation was conducted to assess the influence of key electrolysis process parameters on dye and COD removal. Additionally, neural network models, employing radial basis function and multilayer perceptron approaches, were utilized to predict system outputs based on initial characteristics (COD and dye) and operation conditions. The neural network models provided accurate predictions, offering practical insights for experimental applications.

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“…Guvenc et al [123] proved that Fe electrodes are more suitable for processing waste cutting fluid than Al electrodes. Kobya et al [124] used continuous electrocoagulation to treat waste cutting fluid and found that the removal rates of COD, TOC, and turbidity of Fe electrodes were 98%, 95%, and 99.9%, respectively.…”

Section: Watermentioning

confidence: 99%

Circulating purification of cutting fluid: an overview

Zhou³

et al. 2021

Int J Adv Manuf Technol

181

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Cutting fluid has cooling and lubricating properties and is an important part of the field of metal machining. Owing to harmful additives, base oils with poor biodegradability, defects in processing methods, and unreasonable emissions of waste cutting fluids, cutting fluids have serious pollution problems, which pose challenges to global carbon emissions laws and regulations. However, the current research on cutting fluid and its circulating purification technique lacks systematic review papers to provide scientific technical guidance for actual production. In this study, the key scientific issues in the research achievements of ecofriendly cutting fluid and waste fluid treatment are clarified. First, the preparation and mechanism of organic additives are summarized, and the influence of the physical and chemical properties of vegetable base oils on lubricating properties is analyzed. Then, the process characteristics of cutting fluid reduction supply methods are systematically evaluated. Second, the treatment of oil mist and miscellaneous oil, the removal mechanism and approach of microorganisms, and the design principles of integrated recycling equipment are outlined. The conclusion is concluded that the synergistic effect of organic additives, biodegradable vegetable base oils and recycling purification effectively reduces the environmental pollution of cutting fluids. Finally, in view of the limitations of the cutting fluid and its circulating purification technique, the prospects of amino acid additive development, self-adapting jet parameter supply system, matching mechanism between processing conditions and cutting fluid are put forward, which provides the basis and support for the engineering application and development of cutting fluid and its circulating purification.

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Treatment and operating cost analysis of metalworking wastewaters by a continuous electrocoagulation reactor

Cited by 34 publications

References 25 publications

Optimization of pharmaceutical wastewater treatment by electrocoagulation and dual coagulation

Optimization of pharmaceutical wastewater treatment by electrocoagulation and dual coagulation

Modeling Strategies Based on Multiple Neural Network Systems Applied for a Monopolar and Bipolar Electrocoagulation

Circulating purification of cutting fluid: an overview

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