Impact of continuous and intermittent supply of electric field on the function and microbial community of wastewater treatment electro-bioreactors

Zeyoudi, Mozah; Altenaiji, Eiman; Ozer, Lütfiye Yıldız; Ahmed, Iftikhar; Yousef, Ahmed F.; Hasan, Shadi W.

doi:10.1016/j.electacta.2015.04.095

Cited by 81 publications

(27 citation statements)

References 28 publications

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“…The reported results here show that electro‐bioreactors operated at low HRT of 6, 10, and 16 hr enhanced reactor performance in removing both PO 4 3− –P and NH 4 + –N, with very low measured concentrations in the effluent which did not exceed ≃0.01 and 0.05 mg L −1 , respectively. Taken together with results previously reported by our group (Zeyoudi et al., ), this confirms that optimizing current density and HRT‐operating parameters in an electro‐bioreactor enhances nutrient removal efficiency, resulting in cleaner effluent and high water quality.…”

Section: Discussionsupporting

confidence: 90%

“…The bacterial counts in control and electro‐bioreactors were similar at HRT's of 6, 10 and 16 hr. This means that an electric field at current density of 3 Am −2 stimulated bacterial growth at higher HRT, which we have previously reported (Zeyoudi et al., ), but not at lower HRT's. These findings assume the high removal efficiency of sCOD, PO 4 3− –P and NH 4 + –N at different HRT tested could be due to electrokinetic process taken together with the high density of bacterial community present in the electro‐bioreactors (Henze, ).…”

Section: Resultssupporting

confidence: 68%

“…The intermittent application also minimizes the direct exposure of bacteria to the electric field, potentially reducing the negative effects to the microbial community (Akamatsu et al, 2010;Bani-Melhem & Elektorowicz, 2010;Hasan, Elektorowicz, & Oleszkiewicz, 2014;Liu et al, 2012). We have previously reported that the application of DC at current densities of 5 and 10 Am −2 in electro-bioreactors led to enhancement in bioreactor performance as well as an increase in total bacterial counts and an apparent change in the microbial community structure (Zeyoudi et al, 2015). The performance and microbial community structure in an electro-bioreactor can be influenced by many operating parameters such as nutrient content, anoxic/aerobic phase fraction, salinity, solid retention time (SRT) and hydraulic retention time (HRT) (Fontenot, Bonvillain, Kilgen, & Boopathy, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Effect of hydraulic retention time on microbial community structure in wastewater treatment electro‐bioreactors

2018

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The impact of hydraulic retention time (HRT) on the performance and microbial community structure of control and electro‐bioreactors was investigated. Control bioreactors and electro‐bioreactors were operated at HRT ranging between 6 and 75 hr. The total bacterial counts in addition to the removal efficiency of NH 4 +–N, sCOD, and PO 4 3−–P was assessed in all the reactors tested. In addition, Illumina sequencing was performed to determine the microbial communities that developed in these reactors under each HRT condition. Phylogenetic analysis showed that Proteobacteria and Bacteroidetes were the dominant phyla in those reactors. In addition, Nitrospira sp. and Pseudomonas sp. were found to be present in electro‐bioreactors with higher relative abundance than in control bioreactors. The results presented here are the first to determine what different microbial communities in wastewater electro‐bioreactors due to the application of an electric current under different HRTs.

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Section: Discussionsupporting

confidence: 90%

Section: Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

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Effect of hydraulic retention time on microbial community structure in wastewater treatment electro‐bioreactors

2018

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“…Treated wastewater seems to require less energy and provide renewable options [10][11][12]. Product water of better quality and other useful resources have been obtained from newer wastewater treatment methods including hybridized technology [13][14][15]. However, the application of treated wastewater for potable uses remains questionable and studies have only focused on reclamation of wastewater for non-potable reuse [16,17].…”

Section: Introductionmentioning

confidence: 99%

Wind and Geothermal Energy in Desalination: A Short Review on Progress and Sustainable Commercial Processes

A¹

2015

Ind Eng Manage

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Fossil fuels have been used as the main energy source for the desalination technologies. The continued increase in the demand for desalinated water has resulted in rising greenhouse gas emissions and threat to available fuel reserves. Consequently, most commercial desalination processes powered by fossil fuels have significantly contributed to environmental pollution. Renewable energy comes into the picture as an environmental friendly option as well as a means of fossil energy minimization. In this paper, a review on the use of renewable energy in recent desalination processes has been carried, with a focus on wind and geothermal energy.

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“…The application of a direct current (DC) field to MBRs has proven to be more effective compared to other fouling control methods, however, it is also associated with high energy consumption and affect bacterial lifespan (Wei V. et al, 2011;Zeyoudi et al, 2015). New and cheaper developments suggest that intermittent application of minute electric field also enhances membrane filterability and is similarly effective in controlling fouling as that with continuous DC field (Akamatsu et al, 2010(Akamatsu et al, , 2012Liu et al, 2012a,b).…”

Section: Introductionmentioning

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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Impact of continuous and intermittent supply of electric field on the function and microbial community of wastewater treatment electro-bioreactors

Cited by 81 publications

References 28 publications

Effect of hydraulic retention time on microbial community structure in wastewater treatment electro‐bioreactors

Effect of hydraulic retention time on microbial community structure in wastewater treatment electro‐bioreactors

Wind and Geothermal Energy in Desalination: A Short Review on Progress and Sustainable Commercial Processes

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

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