Electrocoagulation of wastewater using aluminum, iron, and magnesium electrodes

Devlin, Tanner R.; Kowalski, Maciej S.; Pagaduan, Efren; Zhang, Xugang; Wei, V.; Oleszkiewicz, Jan A.

doi:10.1016/j.jhazmat.2018.10.017

Cited by 103 publications

(35 citation statements)

References 23 publications

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“…Results showed that the electrocoagulation-EF system exhibited the superior removal efficiency for TOC (97%), turbidity (100%) and color (100%) among all combinations. Devlin et al (2019) studied effect of electrode materials, that is, aluminum, iron, ANNUAL LITERATURE REVIEW and magnesium, on electrocoagulation treatment of municipal wastewater.Results showed that aluminum and iron electrode exhibited 8-9 times higher reaction rate than magnesium electrode for orthophosphate removal. Bashir, Lim, Amr, Wong, and Sim (2019) investigaed the post treatment of palm oil mill effluent by combination of electrocoagulation and peroxidation.…”

Section: Coagulation/flocculationmentioning

confidence: 99%

Hazardous wastes treatment technologies

Shih

et al. 2020

Water Environment Research

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Section: Coagulation/flocculationmentioning

confidence: 99%

Hazardous wastes treatment technologies

Shih

et al. 2020

Water Environment Research

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“…The first reason is that sacrificial anodes form metal precipitates, which improve the precipitation of contaminants due to flocs generation. Many studies have reported the potentials of electrocoagulation in treating a variety of wastewater including removal of suspended solids (29)(30)(31)(32). And the second one is that when electrical current flows the electrodes, reactor can act as an MEC.…”

Section: Abr Startup and Performance At Different Hrtsmentioning

confidence: 99%

Performance of electrical stimulated anaerobic baffled reactor for removal of typical pollutants from low-strength municipal wastewater at low temperatures

Moradgholi

Massoudinejad

Aghayani

et al. 2019

Environ Health Eng Manag

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Background: Although anaerobic system has been successfully used for treating the strong industrial wastewater, its efficiency for low-strength wastewater as municipal wastewater is not satisfying. This study aimed to enhance the capability of an anaerobic baffled reactor (ABR) for treating municipal wastewater. Methods: A 7-L ABR with 5 compartments was operated for a 287-day period fed with primary effluent from a wastewater treatment plant at 17 to 19°C. The study was conducted in 2 phases. In the first phase, the performance of ABR and in the second phase, the performance of ESABR (ABR integrated with an electrochemical system) were investigated. Results: The results of ABR operation indicated that at hydraulic retention time (HRT) =24 hours, the average removal efficiency of biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), total Kjeldahl nitrogen (TKN), total phosphorous (TP), and log reduction value (LRV) of coliforms were obtained to be 71%, 75%, 79%, 23%, 30.3%, and 5.8 Log, respectively. In this phase, when the HRT was decreased from 24 to 18 hours and from 18 to 14 hours, the removal efficiency of all parameters by the ABR was decreased. After the shift of ABR operation to ESABR, at HRT=24 hours and current density of 0.78 mA/cm2 , the performance of the reactor was enhanced, so that the removal efficiency of BOD, COD, TSS, TKN, TP, and LRV of coliforms were achieved 16.8%, 15%, 4%, 10.7%, 49%, and 1 Log, which was greater than those obtained by ABR. Conclusion: According to the results, this technology (SEABR) is suitable for treating the low-strength municipal wastewater.

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“…It is well-known that when voltage increases, the electrical current increases and according to Faraday's law (Equation 4 where m is dissolved metal mass (g), I, electric current (A), t, electrolysis time (s), M, molar mass, F, Faraday constant (96,485 C/mol), and n, metal valence), the amount of anode dissolution depends on the amount of electricity passing through the anode and the solution which further affects the efficiency of the coagulation process [14,15]. Adapureddy and Goel [10] reported the same finding where by increasing the voltage from 5 to 25 V, the turbidity removal percentage increased from 37.7 to 99%. According to studies by Aziz and Joshi [16], application of higher voltage was not as effective as lower values for longer time spans.…”

Section: Effect Of Applied Voltagementioning

confidence: 99%

“…This process consists of three steps: 1) electro-oxidation of the anode and formation of coagulant materials, 2) neutralization of the surface charge, suspending and breaking the particles and 3) aggregating the formed species in the form of clot [9]. If the iron metal is selected as the electrode, the following electrochemical mechanisms occur in the electrocoagulation process (Equations (1) to (3)) [10]: In anode:…”

Section: Introductionmentioning

confidence: 99%

Performance of Continuous Electrocoagulation Process for Turbidity Removal from Sand Filter Backwash Water

Davarpanah

Sharghi

2019

IJE

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The presence of particles such as algae, clay, organic materials and water-soluble substances often create turbidity or color in water. In recent years, electrocoagulation process has attracted an extensive attention due to its advantages. Since sand filters are widely used in water treatment industry and their corresponding backwash water is large in volume, turbidity removal will save water consumption and its recycling. In this study, real samples of backwash water from sand filters of a water treatment plant in Alborz province were collected. The turbidity removal was further evaluated under operating conditions of 6, 12, 18 and 30 V as the exerted voltages, electrode distances of 1 and 1.5 cm, different initial turbidities (391 NTU as sample 1 and 175 NTU as sample 2), iron and steel as the sacrificial electrodes in a continuous electrocoagulation reactor. According to the results, the optimum conditions without considering the process economy was found to be 30 V, the iron electrode and electrode distance of 1 cm and samples 1 and 2 had an effective turbidity removal efficiency of 98.4 and 91.6%, respectively.

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Electrocoagulation of wastewater using aluminum, iron, and magnesium electrodes

Cited by 103 publications

References 23 publications

Hazardous wastes treatment technologies

Hazardous wastes treatment technologies

Performance of electrical stimulated anaerobic baffled reactor for removal of typical pollutants from low-strength municipal wastewater at low temperatures

Performance of Continuous Electrocoagulation Process for Turbidity Removal from Sand Filter Backwash Water

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