Increased power production from a sediment microbial fuel cell with a rotating cathode

He, Zhen; Shao, Haibo; Angenent, Largus T.

doi:10.1016/j.bios.2007.01.010

Cited by 203 publications

(103 citation statements)

References 15 publications

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“…Firstly, seawater has a higher electrical conductivity than freshwater: the conductivity of seawater and river water is about 50,000 and 500 µS cm −1 at 20 o C, respectively. 21 In MFCs, the internal resistance related to the conductivity of electrolyte is one of the more important factors affecting the high-power density performance. 22 Thus, the increased internal resistance due to poor conductivity contributed to the decrease in power output since the average value of the conductivity measured at this site was 385 µS cm .…”

Section: Resultsmentioning

confidence: 99%

Field Experiments on Bioelectricity Production from Lake Sediment Using Microbial Fuel Cell Technology

Hong¹,

Kim²,

Choi³

et al. 2008

Bulletin of the Korean Chemical Society

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Since particular bacteria are able to oxidize organic matter under anaerobic conditions with concomitant electricity generation while an electrode is serving as an electron acceptor in a fuel cell environment, microbial fuel cells (MFCs) have recently received significant attention. Prototype sediment MFCs were placed in a shallow hypereutrophic lake and generated current for over six months. During the experimental period, a higher electrical current density with an average of 20.4 mA/m 2 was produced using electrodes with higher specific surface areas. Furthermore, parallel connection of sediment MFCs increased the current output. The results showed that current production was severely dependent on temperature and dissolved oxygen concentrations at the cathode. Other findings of this study include not only the direct coupling of current production with a decrease in the organic matter content of the sediment, as well as high positive redox potentials (> +120 mV vs. SHE) in the vicinity of the active anode as compared to sediments where electrodes were not embedded. This implies that the electrochemically active anode evidently acted as an alternative electron acceptor in the sediment, which likely decreased the activity of methanogens and improved the overall decrease in organic matter of sediment. Consequently, this study suggests that the sediment MFC could provide a means for the bioremediation of organic-rich sediment via anaerobic oxidation in conjunction with current production.

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Section: Resultsmentioning

confidence: 99%

Field Experiments on Bioelectricity Production from Lake Sediment Using Microbial Fuel Cell Technology

Hong¹,

Kim²,

Choi³

et al. 2008

Bulletin of the Korean Chemical Society

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“…SMFCs, consisting of an anode electrode embedded in sediment and a cathode electrode suspended in the water above the anode electrode, can extract bioenergy from aquatic sediments through bioelectrochemical reactions, similar to that in a regular MFC [116,117] ( Figure 6). Unlike traditional MFCs, SMFCs do not require separators or ion exchange membranes because the oxygen gradient along the water column and sediment phases creates potential difference naturally (anaerobic/anoxic/aerobic zones) [117]. The electric power generated from SMFCs depends on the water and sediment conditions, the types of electrode material and cathode catalyst, and the distance between electrodes [117].…”

Section: Bes For Agricultural Monitoringmentioning

confidence: 99%

“…Unlike traditional MFCs, SMFCs do not require separators or ion exchange membranes because the oxygen gradient along the water column and sediment phases creates potential difference naturally (anaerobic/anoxic/aerobic zones) [117]. The electric power generated from SMFCs depends on the water and sediment conditions, the types of electrode material and cathode catalyst, and the distance between electrodes [117]. Dissolved oxygen (DO) is crucial for the cathodic reaction, and therefore SMFC is typically installed in shallow waters [118].…”

Section: Bes For Agricultural Monitoringmentioning

confidence: 99%

Development of Bioelectrochemical Systems to Promote Sustainable Agriculture

Abu-Reesh

2015

Agriculture

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Bioelectrochemical systems (BES) are a newly emerged technology for energy-efficient water and wastewater treatment. Much effort as well as significant progress has been made in advancing this technology towards practical applications treating various types of waste. However, BES application for agriculture has not been well explored. Herein, studies of BES related to agriculture are reviewed and the potential applications of BES for promoting sustainable agriculture are discussed. BES may be applied to treat the waste/wastewater from agricultural production, minimizing contaminants, producing bioenergy, and recovering useful nutrients. BES can also be used to supply irrigation water via desalinating brackish water or producing reclaimed water from wastewater. The energy generated in BES can be used as a power source for wireless sensors monitoring the key parameters for agricultural activities. The importance of BES to sustainable agriculture should be recognized, and future development of this technology should identify proper application niches with technological advancement.

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“…Catalysis of oxygen reduction was also demonstrated in drinking water (15), and several aerobic genera exhibited the ability to catalyze oxygen reduction on solid electrodes (13,51). However, few studies revealed such electroactivity properties for surface water ecosystem microbial communities, focusing only on sediment communities (23,27,47).…”

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confidence: 99%

Electroactivity of Phototrophic River Biofilms and Constitutive Cultivable Bacteria

Lyautey

Cournet

Morin

et al. 2011

Appl Environ Microbiol

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Electroactivity is a property of microorganisms assembled in biofilms that has been highlighted in a variety of environments. This characteristic was assessed for phototrophic river biofilms at the community scale and at the bacterial population scale. At the community scale, electroactivity was evaluated on stainless steel and copper alloy coupons used both as biofilm colonization supports and as working electrodes. At the population scale, the ability of environmental bacterial strains to catalyze oxygen reduction was assessed by cyclic voltammetry. Our data demonstrate that phototrophic river biofilm development on the electrodes, measured by dry mass and chlorophyll a content, resulted in significant increases of the recorded potentials, with potentials of up to ؉120 mV/saturated calomel electrode (SCE) on stainless steel electrodes and ؉60 mV/SCE on copper electrodes. Thirty-two bacterial strains isolated from natural phototrophic river biofilms were tested by cyclic voltammetry. Twenty-five were able to catalyze oxygen reduction, with shifts of potential ranging from 0.06 to 0.23 V, cathodic peak potentials ranging from ؊0.36 to ؊0.76 V/SCE, and peak amplitudes ranging from ؊9.5 to ؊19.4 A. These isolates were diversified phylogenetically (Actinobacteria, Firmicutes, Bacteroidetes, and Alpha-, Beta-, and Gammaproteobacteria) and exhibited various phenotypic properties (Gram stain, oxidase, and catalase characteristics). These data suggest that phototrophic river biofilm communities and/or most of their constitutive bacterial populations present the ability to promote electronic exchange with a metallic electrode, supporting the following possibilities: (i) development of electrochemistry-based sensors allowing in situ phototrophic river biofilm detection and (ii) production of microbial fuel cell inocula under oligotrophic conditions.

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Increased power production from a sediment microbial fuel cell with a rotating cathode

Cited by 203 publications

References 15 publications

Field Experiments on Bioelectricity Production from Lake Sediment Using Microbial Fuel Cell Technology

Field Experiments on Bioelectricity Production from Lake Sediment Using Microbial Fuel Cell Technology

Development of Bioelectrochemical Systems to Promote Sustainable Agriculture

Electroactivity of Phototrophic River Biofilms and Constitutive Cultivable Bacteria

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