Low-voltage electric field applied into MBR for fouling suppression: Performance and mechanisms

Zhang, Jiao; Satti, Abdallatif; Chen, Xingguo; Xiao, Kang; Sun, Jianyu; Yan, Xiaoxu; Liang, Peng; Zhang, Xiaoyuan; Huang, Xia

doi:10.1016/j.cej.2015.03.044

Cited by 84 publications

(38 citation statements)

References 31 publications

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“…Schematic illustration of DEP force on particle motion direction [51] To sum up, electrophoresis and electrochemical principle have successfully suppressed membrane fouling by pushing foulants away from deposited on the membrane surface and degraded the foulants simultaneously. However, electrophoresis requires higher energy consumption (3 times higher than electrocoagulation) to attain the similar degree of fouling suppression [32]. Besides, continuous monitoring on toxicity of degraded pollutant is crucial to ensure the practicability of electrochemical oxidation.…”

Section: Electrophoresis and Electrochemicalmentioning

confidence: 99%

“…[31]. On the other hand, the filtration membrane can be an external component to the electrodes pair as shown in Figure 4(b) where the intention of such configuration is to have several zones for different treatment processes [32]. Efficiency of EMBR greatly depends on the electric field strength and selection of electrodes.…”

Section: Fundamental Of Embrmentioning

confidence: 99%

“…When electric field is applied in EMBR, electrokinetic process alters the properties of mixed liquor such as soluble microbial products (SMP) and microorganisms which contribute to the different fouling mechanism [32]. The selection of electrokinetic process should depend on feed quality, effluent discharge standards, microorganisms viability, sludge disposal standards, operating cost, and capital cost.…”

Section: Fundamental Of Embrmentioning

confidence: 99%

“…The mechanisms are summarized from Equation 2 to Equation 4 [35,36]. Fouling suppression mechanism by electrokinetic process in EMBR [32] Anode:…”

Section: Fundamental Of Embrmentioning

confidence: 99%

See 3 more Smart Citations

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: Electrophoresis and Electrochemicalmentioning

confidence: 99%

Section: Fundamental Of Embrmentioning

confidence: 99%

Section: Fundamental Of Embrmentioning

confidence: 99%

“…The mechanisms are summarized from Equation 2 to Equation 4 [35,36]. Fouling suppression mechanism by electrokinetic process in EMBR [32] Anode:…”

Section: Fundamental Of Embrmentioning

confidence: 99%

See 2 more Smart Citations

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

Ho¹,

Teow²,

Ang³

et al. 2017

JESTR

View full text Add to dashboard Cite

show abstract

“…The wastewater first passes through the biological treatment zone for biodegradation, that is between the reactor wall and the anode, then across the electrical zone (i.e., between the electrodes) to undergo some electrochemical processes and further degradation, and eventually is filtered out through the membrane module to remove the solids (Hasan et al, 2014) (Figure 1). In some SMEBR studies, the cathode is designed as part of the membrane module [e.g., carbon cloth electrode fabricated with polyvinylidene fluoride (PVDF) membrane or copper wire cathode inside a PP non-woven sheet] or an electrically conductive low-cost membrane is used as the cathode itself [e.g., terylene cloth modified with polypyrrole (Ppy), polyester filter cloth modified with PPy coated graphene (GR/Ppy), or with PPy coated graphene oxide (GO/Ppy)] (Akamatsu et al, 2012;Liu et al, 2012aLiu et al, ,b, 2013bZhang et al, 2015). Details about membrane and electrode materials are discussed in Section Materials.…”

Section: Main Configurationsmentioning

confidence: 99%

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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Current Status and Future Prospects of Membrane Bioreactors (MBRs) and Fouling Phenomena: A Systematic Review

et al. 2018

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Membrane bioreactors (MBRs) have been widely used for municipal and industrial wastewater treatment around the world due to their advantages, which include higher efficiency, smaller footprint, and lower sludge production over other conventional activated sludge (CAS) processes. However, membrane fouling that results from physicochemical interactions between the membrane and the components of the mixed liquor still remains the most challenging matter preventing the broad application of MBR technology. Recently, a considerable number of experimental and modelling investigations have been conducted concerning MBRs and membrane fouling. Despite the development of low‐fouling membrane systems, more research and engineering activities with a focus on surface modification, wastewater specifications, pre‐treatment and treatment conditions, and efficient fouling control and remedy strategies are still needed to minimize the probability of the occurrence of fouling. It is vital to investigate important aspects of the characterization and mechanisms of the fouling phenomenon to find reliable and long‐term solutions. This review provides a detailed survey of the main aspects of the MBR processes, configurations, advantages and disadvantages, fouling phenomenon, and fouling control strategies in MBRs. Past research and engineering activities in this area are critically reviewed such that pros and cons of recent developments in fouling inhibition and mitigation approaches are also discussed. The main practical and theoretical challenges for the effective utilization of MBRs in various municipal and industrial sectors are then addressed. At the end, we offer useful practical guidelines and recommendations for the better design and operation of MBRs in industrial and public communities.

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Low-voltage electric field applied into MBR for fouling suppression: Performance and mechanisms

Cited by 84 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

Current Status and Future Prospects of Membrane Bioreactors (MBRs) and Fouling Phenomena: A Systematic Review

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