Performance of the submerged membrane electro-bioreactor (SMEBR) with iron electrodes for wastewater treatment and fouling reduction

Bani‐Melhem, Khalid; Elektorowicz, Maria

doi:10.1016/j.memsci.2011.06.017

Cited by 120 publications

(47 citation statements)

References 31 publications

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“…10. Design configuration of SMEBR system [54] To understand the fundamental of electrocoagulation in suppressing membrane fouling, Ibeid et al [53] conducted an experiment to investigate the effect of electrocoagulation on SMP and volatile suspended solids (VSS) towards membrane fouling. The study proved that SMP has more significant effect than VSS on membrane fouling control as the former tends to attract water molecules through hydrogen bonds thus forming a more compact cake layer with reduced sludge filterability.…”

Section: Electrocoagulationmentioning

confidence: 99%

An Overview of Electrically-enhanced Membrane Bioreactor (EMBR) for Fouling Suppression

Ho¹,

Teow²,

Ang³

et al. 2017

JESTR

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Membrane fouling is the major challenges that hinders the widespread application of membrane bioreactor (MBR). Recently, application of electricity in electrically-enhanced MBR (EMBR) to suppress membrane fouling has gained much attention among research communities. This paper presents an overview of developments on EMBR for fouling suppression in wastewater treatment. The flow of electricity has stimulated several electrokinetic processes including electrophoresis/electrochemical process, and electrocoagulation which are the major fouling suppression mechanisms employed in EMBR. In electrophoresis, the membrane fouling is suppressed by the increased electrorepulsive force between negatively-charged foulants and cathode membrane under the influence of an electric field. Besides, electric field also induces simultaneous electrochemical oxidation and reduction which generate chemicals to degrade pollutant in wastewater. On top of that, use of active anode is reminiscent of electrocoagulation which produces cation coagulants in EMBR that capable to neutralize charge of the foulants and promotes flocs formation. This increases flocs size and sedimentation rate thereafter reduces adhesion of foulants on the membrane surface. Lastly, bioelectricity generation of microbial fuel cell (MFC) integrated with MBR to attain self-sustained EMBR has been studied. Self-sustained EMBR combines the advantages of MFC and MBR in treating wastewater and energy recovery simultaneously. Overall, it is evidenced that MBR and electrokinetic processes have a synergetic enhancement effect in EMBR system.

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Section: Electrocoagulationmentioning

confidence: 99%

An Overview of Electrically-enhanced Membrane Bioreactor (EMBR) for Fouling Suppression

Ho¹,

Teow²,

Ang³

et al. 2017

JESTR

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“…Biodegradation alone does not adequately eliminate PO 3− 4 P from aqueous solution hence the low removal efficiency in conventional MBR (as low as 20.8%) (Wei et al, 2009 (7), (8) (Bani-Melhem and Smith, 2012). In the case of sacrificial Fe anode, the iron hydroxides that are formed adsorb the soluble phosphorus and the excess Fe 3+ combines with phosphorus ions to form FePO 4(s) precipitates (Equation 9) (Bani-Melhem and Elektorowicz, 2011). …”

Section: Pollutants Removalmentioning

confidence: 99%

“…There are two factors being considered for such results: (1) the application of high DC field and (2) excessive metal ion concentration (Bani-Melhem and Elektorowicz, 2011;Tafti et al, 2015). Nitrifying bacteria, which are responsible for the conversion of ammonia nitrogen (NH 3 -N) to nitrate nitrogen (NO 3 -N), are very much sensitive to high voltage.…”

Section: Pollutants Removalmentioning

confidence: 99%

“…Furthermore, accumulation of metal ion complexes as a result of electro-dissolution of sacrificial anodes is also detrimental to nitrifying bacteria. Iron complexes, in particular, form a barrier that hinders the transfer of enzymes and nutrients through the microbial cell membrane (Bani-Melhem and Elektorowicz, 2011). This is the reason why ammonia removal using iron and stainless steel anodes are relatively lower (70 and 81.9%, respectively) (Bani-Melhem and Zhang et al, 2015) as compared when using aluminum anode (98-100%) (Wei et al, 2009;Hasan et al, 2012;Giwa et al, 2016).…”

Section: Pollutants Removalmentioning

confidence: 99%

“…This method induces electrochemical mechanisms such as electrocoagulation, electroosmosis, and electrophoresis that help in degradation of pollutants and, at the same time, control the mobility, and deposition of foulants onto the membrane surface (Bani-Melhem and Elektorowicz, 2011). Electrocoagulation is the main mechanism influencing the removal of organic compounds with high fouling potential from wastewater.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Combination of Electrochemical Processes with Membrane Bioreactors for Wastewater Treatment and Fouling Control: A Review

Ensano

Borea

Naddeo

et al. 2016

Front. Environ. Sci.

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This paper provides a critical review about the integration of electrochemical processes into membrane bioreactors (MBR) in order to understand the influence of these processes on wastewater treatment performance and membrane fouling control. The integration can be realized either in an internal or an external configuration. Electrically enhanced membrane bioreactors or electro membrane bioreactors (eMBRs) combine biodegradation, electrochemical and membrane filtration processes into one system providing higher effluent quality as compared to conventional MBRs and activated sludge plants. Furthermore, electrochemical processes, such as electrocoagulation, electrophoresis, and electroosmosis, help to mitigate deposition of foulants into the membrane and enhance sludge dewaterability by controlling the morphological properties and mobility of the colloidal particles and bulk liquid. Intermittent application of minute electric field has proven to reduce energy consumption and operational cost as well as minimize the negative effect of direct current field on microbial activity which are some of the main concerns in eMBR technology. The present review discusses important design considerations of eMBR, its advantages as well as its applications to different types of wastewater. It also presents several challenges that need to be addressed for future development of this hybrid technology which include treatment of high strength industrial wastewater and removal of emerging contaminants, optimization study, cost benefit analysis and the possible combination with microbial electrolysis cell for biohydrogen production.

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In Situ Soil and Sediment Remediation

Pamukcu

2018

Handbook of Environmental Engineering

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Performance of the submerged membrane electro-bioreactor (SMEBR) with iron electrodes for wastewater treatment and fouling reduction

Cited by 120 publications

References 31 publications

An Overview of Electrically-enhanced Membrane Bioreactor (EMBR) for Fouling Suppression

An Overview of Electrically-enhanced Membrane Bioreactor (EMBR) for Fouling Suppression

Combination of Electrochemical Processes with Membrane Bioreactors for Wastewater Treatment and Fouling Control: A Review

In Situ Soil and Sediment Remediation

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