Coupling of electricity generation and denitrification in three-phase single-chamber MFCs in high-salt conditions

Zeng, Fanjin; Wu, Yaoting; Bo, Le; Zhang, Linghua; Liu, Wei Feng; Zhu, Yimin

doi:10.1016/j.bioelechem.2020.107481

Cited by 33 publications

(6 citation statements)

References 26 publications

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“…The electrodes were connected via an insulated copper wire with an external resistance of 1000 Ω. After that, the MFC was inoculated with 10 mL of waste-activated sludge obtained from a municipal treatment plant (Shanghai, China), 112.5 mL of phosphate-buffered solution (PBS) (5 M), and 2.5 mL of trace mineral solution . The organic electron donor for the MFC was sodium acetate at a concentration of 1.0 g/L.…”

Section: Materials and Methodsmentioning

confidence: 99%

Biogenic Melanin-Modified Graphene as a Cathode Catalyst Yields Greater Bioelectrochemical Performances by Stimulating Oxygen–Reduction and Microbial Electron Transfer

Wu,

Liang,

Zhou

et al. 2023

ACS EST Water

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Bioelectrochemical systems (BES) can recover energy from organic-bearing waste streams, but their use has been stymied by poor electron transfer from the cathode. Redoxactive electron shuttles could stimulate electron transfer provided that they are compatible with the exoelectrogenic bacteria. This work evaluated melanin-modified carboxylated graphene (M/CG) as a novel cathode catalyst in a microbial fuel cell. Biogenic melanin catalysts (i.e., bio-M/CG) significantly increased bioelectricity production due to its abundant pyrrole N, which lowered chargetransfer resistance and, thus, promoted the cathodic oxygen− reduction reaction (ORR). The high content of pyrrole N in the bio-M/CG catalyst also enriched exoelectrogens, such as Azospirillum, Chryseobacterium, and Azoarcus, which accounted for over 50% of the total abundance of bacteria in biofilms on the anode. Moreover, the functional genes of key enzymes involved in microbial electron transfer (MET) were increased by the bio-M/CG catalyst. These data confirm that the bio-M/CG catalyst improved the bioelectrochemical performance via synergetic promotion of cathodic ORR and microbial electron transfer, thus providing a new alternative for advancing BES technology. This work highlights the potential application of melanin in enhancing cathodic oxygen−reduction reaction kinetics and improving microbial electron transfer in BES. This study emphasizes the promising application of melanin in enhancing the ORR kinetics and improving MET in BES, offering exciting prospects for future sustainable and environmentally friendly applications.

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Section: Materials and Methodsmentioning

confidence: 99%

Biogenic Melanin-Modified Graphene as a Cathode Catalyst Yields Greater Bioelectrochemical Performances by Stimulating Oxygen–Reduction and Microbial Electron Transfer

Wu,

Liang,

Zhou

et al. 2023

ACS EST Water

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“…3J), genera which include electroactive bacteria. 36,37 These microbes might provide redox active electron shuttles (which many electroactive bacteria are known to do 38 ), and/or oxidise organic metabolites received from the photoautotrophs, transferring electrons to the anode (Fig. S16, ESI ‡).…”

Section: Working Hypothesis For the Mechanism Of Operation Of The Al-...mentioning

confidence: 99%

Powering a microprocessor by photosynthesis

Bombelli

Savanth

Scarampi

et al. 2022

Energy Environ. Sci.

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“…Xia et al [ 139 ] used the dual-chamber MFC to achieve a power density of 543.75 mW/m 2 with 76.15% total nitrogen removal and 83.23% ammonia-nitrogen removal from organic acid fermentation wastewater. Zeng et al [ 140 ] also achieved a nitrogen removal of 63.4% using a three-phase single-chamber MFC with a phase of immobilized Halomonas strain. However, Srikanth et al [ 141 ] obtained a power density of 225 mW/m 2 with removal efficiencies of 95% oil, 80% phenol, and 79.5% sulfide using the single-chamber MFC in a continuous mode.…”

Section: Recent Progress In the Application Of Mfc Technologymentioning

confidence: 99%

A Review of Recent Advances in Microbial Fuel Cells: Preparation, Operation, and Application

Wang

Ren

Zhu

et al. 2022

BioTech

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The microbial fuel cell has been considered a promising alternative to traditional fossil energy. It has great potential in energy production, waste management, and biomass valorization. However, it has several technical issues, such as low power generation efficiency and operational stability. These issues limit the scale-up and commercialization of MFC systems. This review presents the latest progress in microbial community selection and genetic engineering techniques for enhancing microbial electricity production. The summary of substrate selection covers defined substrates and some inexpensive complex substrates, such as wastewater and lignocellulosic biomass materials. In addition, it also includes electrode modification, electron transfer mediator selection, and optimization of operating conditions. The applications of MFC systems introduced in this review involve wastewater treatment, production of value-added products, and biosensors. This review focuses on the crucial process of microbial fuel cells from preparation to application and provides an outlook for their future development.

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Coupling of electricity generation and denitrification in three-phase single-chamber MFCs in high-salt conditions

Cited by 33 publications

References 26 publications

Biogenic Melanin-Modified Graphene as a Cathode Catalyst Yields Greater Bioelectrochemical Performances by Stimulating Oxygen–Reduction and Microbial Electron Transfer

Biogenic Melanin-Modified Graphene as a Cathode Catalyst Yields Greater Bioelectrochemical Performances by Stimulating Oxygen–Reduction and Microbial Electron Transfer

Powering a microprocessor by photosynthesis

A Review of Recent Advances in Microbial Fuel Cells: Preparation, Operation, and Application

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