Complete nitrogen removal by simultaneous nitrification and denitrification in flat-panel air-cathode microbial fuel cells treating domestic wastewater

Park, Young-Hyun; Park, Seonghwan; Nguyễn, Văn Khánh; Yu, Jaecheul; Torres, César I.; Rittmann, Bruce E.; Lee, Tae‐Ho

doi:10.1016/j.cej.2017.02.005

Cited by 155 publications

(46 citation statements)

References 44 publications

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“…The greatest number of SAL5 bacterial clones (56%) were classified within the genus Marinobacter known to persist under extremely oligotrophic and nutrient-limited conditions (Riedel et al, 2013 ) and to possess efficient aerobic denitrification ability (Zheng et al, 2012 ). Autotrophic denitrification performance was also reported for extremely oligotrophic bacteria belonging to the genus Nitratireductor (Nguyen et al, 2015 ; Park et al, 2017 ), which was represented by almost half of all ATA clones analyzed. Remaining clones of the ATA library belonged to genus Kordiimonas .…”

Section: Resultsmentioning

confidence: 55%

Contribution of Bicarbonate Assimilation to Carbon Pool Dynamics in the Deep Mediterranean Sea and Cultivation of Actively Nitrifying and CO2-Fixing Bathypelagic Prokaryotic Consortia

et al. 2018

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Covering two-thirds of our planet, the global deep ocean plays a central role in supporting life on Earth. Among other processes, this biggest ecosystem buffers the rise of atmospheric CO2. Despite carbon sequestration in the deep ocean has been known for a long time, microbial activity in the meso- and bathypelagic realm via the “assimilation of bicarbonate in the dark” (ABD) has only recently been described in more details. Based on recent findings, this process seems primarily the result of chemosynthetic and anaplerotic reactions driven by different groups of deep-sea prokaryoplankton. We quantified bicarbonate assimilation in relation to total prokaryotic abundance, prokaryotic heterotrophic production and respiration in the meso- and bathypelagic Mediterranean Sea. The measured ABD values, ranging from 133 to 370 μg C m−3 d−1, were among the highest ones reported worldwide for similar depths, likely due to the elevated temperature of the deep Mediterranean Sea (13–14°C also at abyssal depths). Integrated over the dark water column (≥200 m depth), bicarbonate assimilation in the deep-sea ranged from 396 to 873 mg C m−2 d−1. This quantity of produced de novo organic carbon amounts to about 85–424% of the phytoplankton primary production and covers up to 62% of deep-sea prokaryotic total carbon demand. Hence, the ABD process in the meso- and bathypelagic Mediterranean Sea might substantially contribute to the inorganic and organic pool and significantly sustain the deep-sea microbial food web. To elucidate the ABD key-players, we established three actively nitrifying and CO2-fixing prokaryotic enrichments. Consortia were characterized by the co-occurrence of chemolithoautotrophic Thaumarchaeota and chemoheterotrophic proteobacteria. One of the enrichments, originated from Ionian bathypelagic waters (3,000 m depth) and supplemented with low concentrations of ammonia, was dominated by the Thaumarchaeota “low-ammonia-concentration” deep-sea ecotype, an enigmatic and ecologically important group of organisms, uncultured until this study.

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Section: Resultsmentioning

confidence: 55%

Contribution of Bicarbonate Assimilation to Carbon Pool Dynamics in the Deep Mediterranean Sea and Cultivation of Actively Nitrifying and CO2-Fixing Bathypelagic Prokaryotic Consortia

et al. 2018

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“…It is well known that both nitrification and denitrification can occur on cathodes in MFCs. 44,45 Also, genera that play a role in nitrification (Nitrosomonas and Nitrospira) and denitrification (Dechloromonas) were reported to be present on carbon-based cathodes in MFCs. 42,46 It is not clear why in the current study nitrifiers were mainly enriched on the SS cathode and denitrifiers on Cu cathode.…”

Section: Microbial Community Analysismentioning

confidence: 99%

Copper current collectors reduce long-term fouling of air cathodes in microbial fuel cells

Myung

Yang

Saikaly

et al. 2018

Environ. Sci.: Water Res. Technol.

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“…Due to a greater resistance to poisoning compared with platinum catalysed cathodes, cathode servicing intervals may be improved . In addition to catalysing the ORR, some catalysts can further assist in the bioremediation of wastewater that may not be fully addressed in the anode chamber, such as the reduction of nitrates, sulphates and dyes …”

Section: Biocathode Considerationsmentioning

confidence: 99%

Biocatalytic electrode improvement strategies in microbial fuel cell systems

Breheny

Bowman

Farahmand

et al. 2019

J of Chemical Tech & Biotech

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Microbial fuel cells (MFCs) produce electricity as a result of the microbial metabolism of organic substrates, hence they represent a sustainable approach for energy production and waste treatment. If the technology is to be implemented in industry, low cost and sustainable bioelectrodes must be developed to increase power output, increase waste treatment capacity, and improve service intervals. Although the current application of abiotic electrode catalysts, such as platinum and electrode binders such as Nafion leads to greater MFC performance, their use is cost prohibitive. Novel bioelectrodes which use cost effective and sustainable materials are being developed. These electrodes are developed with the intention to reduce start-up time, reduce costs, extend life-span and improve core MFC performance metrics (i.e. power density, current density, chemical oxygen demand (COD) reduction and Coulombic efficiency (CE)). Comparison of different MFC systems is not an easy task. This is due to variations in MFC design, construction, operation, and different inocula (in the case of mixed-culture MFCs). This high intra-system variability should be considered when assessing MFC data, operation and performance. This review article examines the major issues surrounding bioanode and biocathode improvement in different MFC systems, with the ultimate goal of streamlining and standardising improvement processes.

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Complete nitrogen removal by simultaneous nitrification and denitrification in flat-panel air-cathode microbial fuel cells treating domestic wastewater

Cited by 155 publications

References 44 publications

Contribution of Bicarbonate Assimilation to Carbon Pool Dynamics in the Deep Mediterranean Sea and Cultivation of Actively Nitrifying and CO2-Fixing Bathypelagic Prokaryotic Consortia

Contribution of Bicarbonate Assimilation to Carbon Pool Dynamics in the Deep Mediterranean Sea and Cultivation of Actively Nitrifying and CO2-Fixing Bathypelagic Prokaryotic Consortia

Copper current collectors reduce long-term fouling of air cathodes in microbial fuel cells

Biocatalytic electrode improvement strategies in microbial fuel cell systems

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