Nitrogen removal in a two-chambered microbial fuel cell: Establishment of a nitrifying–denitrifying microbial community on an intermittent aerated cathode

Sotres, Ana; Cerrillo, Míriam; Viñas, Marc; Blasi, August Bonmatí

doi:10.1016/j.cej.2015.08.100

Cited by 130 publications

(37 citation statements)

References 31 publications

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“…Such scenario may be due to the effectiveness of the ammonium ion (NH4 + ) migration in the anode chamber to the cathode which might eventually become nitrogen via further nitrification and denitrification reactions in the air cathode compartment under the optimum temperature. Similar phenomenon can also be observed in a non-hybrid dual chamber MFC operated at room temperature ($23 C) where a total of 30.4% of the NH4 + migrated through the PEM to the cathode chamber for nitrification [54]. Since there was an effective removal of NH 3 À ÀN in the anode chamber when operated at 35 C, TN concentration was greatly affected as well because NH 3 À ÀN was one of the component measured in TN, on top of other organic nitrogen, nitrate nitrogen and nitrite nitrogen presented in the POME.…”

Section: Organics and Solids Removalmentioning

confidence: 57%

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Tee

Abdullah

Tan

et al. 2017

Journal of Environmental Chemical Engineering

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A B S T R A C TA cost effective single-chamber microbial fuel cell (MFC) integrated with adsorption system was tested under different operating temperatures to observe pH profiles, organics, solids, nutrients, color and turbidity removal and power density generation. The optimum operating temperature range was found to be $25-35 C with majority of the removals achieved at $35 C. Maximum power density recorded was 74 AE 6 mW/m 3 with coulombic efficiency (CE) of 10.65 AE 0.5% when operated at 35 C. Present studies had successfully demonstrated the effectiveness of a hybrid system in removing various types of pollutants in POME at optimum temperature and able to fulfill the stringent effluent discharge limit. Chemical oxygen demand (COD), total solids (TS) and turbidity removals increase linearly with temperatures with removal efficiency of 0.5889% C À1 , 1.0754% C À1 and 0.7761% C À1, respectively. The temperature coefficient (Q 10 ) is found to be 1.06, 1.45 and 1.09, respectively. Besides, MFC-adsorption hybrid system had demonstrated superior stability over a wide range of operating temperatures in terms of COD removal as compared to the non-integrated MFC system.

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Section: Organics and Solids Removalmentioning

confidence: 57%

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Tee

Abdullah

Tan

et al. 2017

Journal of Environmental Chemical Engineering

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“…In addition, the emergence of anaerobic bacteria revealed the presence of low DO layer in inner biofilm. For nitrogen removal, the ammonium converted into nitrite was attributed to Comamonadaceae _ unclassified (4.5 %) and Nitrosomonas (0.4 %), while the nitrite oxidizing was mainly caused by Nitrospira (1.2 %). Denitratisoma (5.6 %) is a well‐known heterotrophic denitrifying bacterium, which can use nitrate or nitrite as electron acceptor and acetate as electron donor .…”

Section: Resultsmentioning

confidence: 99%

Development of a Novel Membrane‐less Microbial Fuel Cell (ML‐MFC) with a Sandwiched Nitrifying Chamber for Efficient Wastewater Treatment

et al. 2018

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A novel membrane‐less microbial fuel cell (ML‐MFC) which used the baffles instead of the ion exchange membrane (IEM) was developed for ammonium‐containing wastewater treatment and electricity generation. By means of installing an ideal nitrifying unit between the anodic and cathodic chamber, the novel ML‐MFC accomplished organics degradation and nitrogen removal without additional loop. The removal efficiencies of COD, NH4+−N and TN achieved 97.07±0.47 %, 91.76±3.32 % and 87.66±1.59 %, respectively. Meanwhile, the effluent pH was near neutral and turbidity was quite low. In addition, the maximum power density of 1.007±0.032 W/m3 was obtained. Combined with the analysis of microbial community, electroactive bacteria (EAB) Desulfovibrio, Comamonas and Thiobacillus were enriched in biofilm. Considering the superior effluent quality and the promising energy potential, the novel ML‐MFC has good application prospects in efficient and sustainable wastewater treatment.

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“…The most predominant and active family for days 124 th and 145 th was Commamonadaceae (~12%; Figure 5). Although Commamonadaceae family is usually related to denitrification, 18 this family has also been found in nitrifying aerobic environments together with AOB [19,20]. The representative OTUs belong to the genera Hydrogenophaga and Acidovorax, typical denitrifyers from municipal or industrial treatment plants [17].…”

Section: Microbial Assessmentmentioning

confidence: 99%

“…Besides, molecular techniques have been applied to follow up the acclimation and enrichment of the biomass such as fluorescence in-situ hybridization (FISH), polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE), quantitative PCR (qPCR) and next generation sequencing (NGS) of the present DNA [16][17][18][19][20]. Nevertheless, DNA analysis does not show the activity of the biofilm but only its genetic potential.…”

Section: Introductionmentioning

confidence: 99%

Startup strategy for nitrogen removal via nitrite in a BAF system

Gabarró

Guivernau

Burgos

et al. 2018

Bioprocess Biosyst Eng

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A biological aerated filter (BAF) pilot plant consisting in two reactors (aerobic and anoxic one) was used to determine a strategy to remove nitrogen via nitrite. RNA/DNA analysis was performed to assess microbial activity and support chemical results. In less than 13 days the pilot plant was able to remove COD and suspended solids. Nitrogen removal via nitrite pathway could not be observed until day 130 th when the empty bed contact time (EBCT) was set at 0.71h. Nitrite was detected in the aerated BAF effluent but never nitrate. qPCR of amoA gene from RNA and DNA extracts of the aerobic biofilm confirmed that ammonia oxidizing bacteria (AOB) were present from the beginning of the operation but not active. AOB activity increased by time reaching stability from operational day 124 th. The combination of both, low EBCT together with high OLR, has been demonstrated to be a feasible strategy to startup a BAF to achieve nitrogen removal via nitrite.

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Nitrogen removal in a two-chambered microbial fuel cell: Establishment of a nitrifying–denitrifying microbial community on an intermittent aerated cathode

Abstract: 12A Microbial fuel Cell (MFC) was used to study nitrogen dynamics and its feasibility for high

Cited by 130 publications

References 31 publications

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Development of a Novel Membrane‐less Microbial Fuel Cell (ML‐MFC) with a Sandwiched Nitrifying Chamber for Efficient Wastewater Treatment

Startup strategy for nitrogen removal via nitrite in a BAF system

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