Phosphorus removal from domestic wastewater in electrocoagulation reactor using aluminium and iron plate hybrid anodes

Omwene, Philip Isaac; Kobya, Mehmet; Can, Orhan Taner

doi:10.1016/j.ecoleng.2018.08.025

Cited by 109 publications

(31 citation statements)

References 38 publications

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“…4 ). Most of the rest Fe 2+ was oxidized to Fe 3+ in the MBR, which was mainly hydrolyzed and formed flocculent hydroxyl iron ② through reaction of 4Fe(OH) 2 + O 2 + 2H 2 O = 4Fe(OH) 3 ( Omwene et al, 2018 ). Hydroxyl iron showed strong adsorption performance and could adsorb PO 4 3− to form precipitation ③ due to its large specific surface area ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…4 ). The unhydrolyzed Fe 3+ would directly generate FePO 4 precipitate with PO 4 3−④ ( Cheng et al, 2017 , Omwene et al, 2018 ), so it would produce large amounts of the aerobic P-Fe containing sludge in MBR ③ . At the same time, the rearrangement of iron and oxygen atoms in the iron hydride resulted in the formation of hematite (Fe 2 O 3 ) ⑤ (2Fe(OH) 3 = Fe 2 O 3 + 3H 2 O) ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The most P can be concentrated in iron-based sludge through electrocoagulation (EC) so as to remove phosphorus from wastewater. It has the advantages of flexible process, strong controllability, avoiding the use of chemicals, avoiding secondary pollution, which can be easy to realize automation and high energy efficiency ( Nguyen et al, 2016 , Omwene et al, 2018 ). The biological method reduces phosphate content in wastewater by transferring phosphate to sludge phase ( Liu et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

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Phosphate substances transformation and vivianite formation in P-Fe containing sludge during the transition process of aerobic and anaerobic conditions

Liu

Gao

2021

Bioresource Technology

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phosphate substances transformation and vivianite formation in P-Fe containing sludge during the transition process of aerobic and anaerobic conditions

Liu

Gao

2021

Bioresource Technology

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“…If the current is controlled, all parameters such as coagulant dosage, bubble production rate, floc size, and growth are controlled. [52] In addition, the application time is important because it affects the amount of the coagulant. The highest COD removal was determined as 91% with the Fe-Al electrode pair at 2.16 A, pH 9, and 60 min.…”

Section: Ec/ef Experimentsmentioning

confidence: 99%

Electrocoagulation/Electroflotation Process for Removal of Organics and Microplastics in Laundry Wastewater

Akarsu

Deniz

2020

CLEAN Soil Air Water

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In the present research, laundry wastewater treatment is studied using the electrocoagulation/electroflotation process. For the optimization of treatment conditions such as electrode type (Al–Al, Al–Fe, Fe–Fe, and Fe–Al), initial pH (5–9), current (0.54–2.16 A), and application time (15–60 min), response surface methodology is used. Removal efficiencies of chemical oxygen demand (COD), color, anionic surfactant, microplastic, and phosphate are studied. It is determined that the most effective removal is obtained with 2.16 A current, pH 9, and 60 min reaction time using Fe–Al electrode. Here, 91%, 94%, 100%, and 98% removal efficiencies are achieved for COD, surfactant, color, and microplastic, respectively. The operating cost of the combined process is calculated as $1.32 m−3 for the optimum removal parameters. The adsorption kinetics study shows that the removal follows second‐order kinetics. The laboratory‐scale test results indicate that the electrocoagulation/electroflotation process is feasible for the treatment of laundry wastewater.

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“…The EC technology comprised of three purification stages such as; (1) generation of coagulants by the electrolytic oxidation of sample wastewater; (2) destabilization of contaminants, deterioration emulsification and particle suspension; (3) for the generation of floc, the agglomeration of resultant particles consisting of colloids entangled in sludge layer formed after coagulation reaction (Elazzouzi, El Kasmi, Haboubi, & Elyoubi, 2018). These flocs having similarity with chemical flocs, therefore they can be easily separated out by the sand filtration process due to their larger size, stability, containing less amount of water and acid resistance (Omwene, Kobya, & Can, 2018;Tanyol, Ogedey, & Oguz, 2018). A number of electrochemical reactions are involved in this process which occur at anode and cathode in the sequence as mentioned in equations (1-7).…”

Section: Introductionmentioning

confidence: 99%

Sustainable Wastewater Treatment Using Electrocoagulation Process Coupled With Powdered Activated Carbon

Sher

Iqbal

Rasheed

et al. 2021

Preprint

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In this research an electrochemical technique in combination with powdered activated carbon (PAC) for the removal of micropollutants by adsorption as an advanced stage purification step from effluents of pilot plant wastewater treatment plants (WWTP). The effluents of sedimentation tank comprised of wastewater plus PAC (WWPAC). The pilot plant mainly consists of two parts; the first one consists of electrocoagulation (EC) reactor and the second consists of electrophoretic deposition (EPD) discs and electroflotation (EF) setup. The electrocoagulation (EC) reactor is a fiber box consisting of two chambers and thirty four plates of one material (either Fe or Al) on the whole in one EC reactor while one cell has seventeen plates. Both types of electrodes have been tested with the outflow of sedimentation tank. The outflow from the sedimentation tank has been entered into the EC reactor for the determination of EC reactor efficacy for the successful accomplishment of EC process at the designed pilot plant for WW treatment. The effect of different operational parameters; PAC dosage (20 mg), electrode nature (Fe and Al), current density (0.34–2.02 A/m2) has been studied to find out the optimum conditions. Sludge volume index (SVI) of the sludge, thermogravimetric (TG), differential thermal analyses (DTA) and particle size distribution (PSD) of the flocs generated after the EC process has also been studied. The turbidity, pH and conductivity of effluents before and after EC treatment has also been carried out. This pilot plant research gave promising results for future work in advance wastewater treatment direction.

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Phosphorus removal from domestic wastewater in electrocoagulation reactor using aluminium and iron plate hybrid anodes

Cited by 109 publications

References 38 publications

Phosphate substances transformation and vivianite formation in P-Fe containing sludge during the transition process of aerobic and anaerobic conditions

Phosphate substances transformation and vivianite formation in P-Fe containing sludge during the transition process of aerobic and anaerobic conditions

Electrocoagulation/Electroflotation Process for Removal of Organics and Microplastics in Laundry Wastewater

Sustainable Wastewater Treatment Using Electrocoagulation Process Coupled With Powdered Activated Carbon

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