Performance evaluation of a continuous bipolar electrocoagulation/electrooxidation–electroflotation (ECEO–EF) reactor designed for simultaneous removal of ammonia and phosphate from wastewater effluent

Mahvi, Amir Hossein; Ebrahimi, Seyed Jamal Al-din; Mesdaghinia, Alireza; Gharibi, Hamed; Sowlat, Mohammad H.

doi:10.1016/j.jhazmat.2011.06.041

Cited by 122 publications

(45 citation statements)

References 31 publications

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“…Recently, adsorption and electrocoagulation emerged as very effective solutions to overcome the major drawbacks of conventional processes in removing unwanted wastewater effluents (Hamdan and El-Naas 2014). These methods have the ability to remove a wide range of pollutants (Barrera-Díaz et al 2014;Elabbas et al 2016), such as phenolic wastes (Adhoum and Monser 2004), petroleum refinery wastewater (Gousmi et al 2016), organic wastewater (Mahvi et al 2011) ammoniac and phosphate treatment wastewater (Adebayo et al 2015), textile wastewater (Saeed et al 2015), and removal of heavy metals (Umran and Sadettin 2015).…”

Section: Introductionmentioning

confidence: 99%

The alternating and direct current effect on the elimination of cationic and anionic dye from aqueous solutions by electrocoagulation and coagulation flocculation

Othmani

Kesraoui

Seffen

2017

Euro-Mediterr J Environ Integr

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In this study, we investigated the effect of alternating current (AC) and direct current (DC) on the elimination of methylene blue (MB) and indigo carmine (IC) by the electrocoagulation process using two Pb electrodes in comparison with the coagulation-flocculation process. Different parameters influencing the elimination of these dyes were studied, namely initial dye concentration, initial pH, voltage, temperature, coagulant and flocculant concentration and current density. The elimination of MB reached 98.8% with AC and 97.3% with DC at current density of 0.5 A/m 3 and pH of 7.0. However, the energy consumed was lower in the case of AC (4.89 9 10 -6 kWh/m 3 ) than DC (7.6 9 10 -6 kWh/m 3 ). The elimination was also faster in the case of AC (0.47 mg L -1 /min) than the DC (0.066 mg L -1 /min). The same behavior was observed with the IC where the effectiveness of dye elimination was, respectively, 98.5 and 100% with an energy consumed (E c ) of 4.35 9 10 -5 and 2.03 9 10 -6 kWh/m 3 , respectively, with DC and AC. The adsorption kinetic data were obtained using pseudo-firstorder and pseudo-second-order models. The pseudo-second-order was more appropriate describing the adsorption kinetics of methylene blue and the pseudo-first-order was more appropriate describing the adsorption kinetics of indigo carmine. Langmuir, Freundlich and Sips models were used to optimize the elimination dye process. The Sips model displayed the best fit of the equilibrium data.

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Section: Introductionmentioning

confidence: 99%

The alternating and direct current effect on the elimination of cationic and anionic dye from aqueous solutions by electrocoagulation and coagulation flocculation

Othmani

Kesraoui

Seffen

2017

Euro-Mediterr J Environ Integr

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“…According to Mahvi et al (2011), the EC does not remove TN (ammonia), and out of the electrochemical processes, electrooxidation is the mechanism responsible for ammonia removal in the effluent. Whereas ammonia is the form of nitrogen present in the digestate (Mezzari et al, 2013), a modification in the EC reactor configuration is required to increase the removal efficiency of TN (ammonia) by electrochemical process.…”

Section: Resultsmentioning

confidence: 99%

“…Whereas ammonia is the form of nitrogen present in the digestate (Mezzari et al, 2013), a modification in the EC reactor configuration is required to increase the removal efficiency of TN (ammonia) by electrochemical process. Mahvi et al (2011) proposed that electrodes of Al, RuO 2 /Ti and stainless steel need to be inserted in an EC reactor, to form a configuration of electrocoagulation/electro-oxidation.…”

Section: Resultsmentioning

confidence: 99%

Swine manure digestate treatment using electrocoagulation

Kunz

Steffens

et al. 2016

Sci. agric. (Piracicaba, Braz.)

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Anaerobic biodigestion is an appropriate alternative for the treatment of swine wastewater due to its biogas generation properties and the possibility of its application as a source of energy for heating or electricity. However, digestate can still contain high levels of turbidity, organic carbon and nutrients and must be correctly managed as a biofertilizer, or treated to avoid any impact on the environment. Considering this, electrocoagulation (EC) shows promise as a technology because of its ease of handling and high efficiency in effluent remediation. This study aimed to evaluate the performance of EC in a batch system in the treatment of swine wastewater digestate. The wastewater used in the treatment was sampled from a 10 m 3 biodigestor effluent (digestate) located at Concórdia, Santa Catarina, Brazil. A batch-scale experiment was carried out to evaluate the following two variables: electrode distance (ED) and voltage applied (V). The removal efficiency levels (%) for the best operational condition (2 cm, 5 V) after 30 min were: 97 %, 98 %, 77 % and 10 % for color, turbidity, total organic carbon (TOC) and total nitrogen (TN), respectively. The EC batch system produced efficient results, underlining its promise as an alternative to be applied in the treatment of digestate.

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“…To increase the EC efficiency, there is a new tendency of using EC process simultaneously with electro-oxidation in the same device [175]. This tendency was recently lead by some researchers such as Mahvi et al [175] and Cotillas et al [176]. Indeed, Cotillas et al [176] described a novel integrated electrochemical process for urban wastewater regeneration.…”

Section: Future Tendencies Of Ec Processmentioning

confidence: 99%

Advanced oxidation phenomena in electrocoagulation process: a myth or a reality?

Ghernaout

2013

Desalination and Water Treatment

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A B S T R A C TThis review discusses the advanced oxidation process (AOP) phenomena in electrocoagulation (EC) process. AOPs have been broadly defined as near ambient temperature treatment processes based on highly reactive radicals, especially the hydroxyl radical ð Á OHÞ as the primary oxidant. In principle, as water-containing colloidal particulates, oils, or other contaminants move through the applied electric field, there may be ionisation, electrolysis, hydrolysis, and free-radical formation which may alter the physical and chemical properties of water and contaminants. Further, when the electrochemical reactors operate at a high cell potential and an anodic process occurs in the potential region of water discharge, hydroxyl radicals ð Á OHÞ are generated. In order to get more probabilities to have free radicals formation in EC, ultrasound during EC may be very useful as discussed by some authors. Further, EC process at pH less than 3 has more chance to produce hydroxyl radicals formation. Finally, this review concludes that there is no proof of the presence of AOP phenomena in EC process and more research is needed here focusing on free radicals formation.

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Performance evaluation of a continuous bipolar electrocoagulation/electrooxidation–electroflotation (ECEO–EF) reactor designed for simultaneous removal of ammonia and phosphate from wastewater effluent

Cited by 122 publications

References 31 publications

The alternating and direct current effect on the elimination of cationic and anionic dye from aqueous solutions by electrocoagulation and coagulation flocculation

The alternating and direct current effect on the elimination of cationic and anionic dye from aqueous solutions by electrocoagulation and coagulation flocculation

Swine manure digestate treatment using electrocoagulation

Advanced oxidation phenomena in electrocoagulation process: a myth or a reality?

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