Electricity generation from mixed volatile fatty acids using microbial fuel cells

Teng, Shao-Xiang; Tong, Zhong‐Hua; Li, Wen-Wei; Wang, Shuguang; Sheng, Guo‐Ping; Shi, Xianyang; Liu, Xianwei; Yu, Han‐Qing

doi:10.1007/s00253-010-2746-5

Cited by 84 publications

(28 citation statements)

References 36 publications

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“…in MFCs fed with short-chain fatty acids is sometimes reported (Teng et al, 2010;Xing et al, 2010), their ecophysiological roles in the MFCs are largely unknown. In general, members of the genus Hydrogenophaga are known to be aerobic bacteria that can oxidize hydrogen but not acetate (Kämpfer et al, 2005).…”

Section: Syntrophic Acetate-oxidizing Microbes In Mfcsmentioning

confidence: 99%

Acetate oxidation by syntrophic association between Geobacter sulfurreducens and a hydrogen-utilizing exoelectrogen

Kimura

Okabe

2013

The ISME Journal

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Anodic microbial communities in acetate-fed microbial fuel cells (MFCs) were analyzed using stableisotope probing of 16S rRNA genes followed by denaturing gradient gel electrophoresis. The results revealed that Geobacter sulfurreducens and Hydrogenophaga sp. predominated in the anodic biofilm. Although the predominance of Geobacter sp. as acetoclastic exoelectrogens in acetate-fed MFC systems has been often reported, the ecophysiological role of Hydrogenophaga sp. is unknown. Therefore, we isolated and characterized a bacterium closely related to Hydrogenophaga sp. (designated strain AR20). The newly isolated strain AR20 could use molecular hydrogen (H 2 ), but not acetate, with carbon electrode as the electron acceptor, indicating that the strain AR20 was a hydrogenotrophic exoelectrogen. This evidence raises a hypothesis that acetate was oxidized by G. sulfurreducens in syntrophic cooperation with the strain AR20 as a hydrogen-consuming partner in the acetate-fed MFC. To prove this hypothesis, G. sulfurreducens strain PCA was cocultivated with the strain AR20 in the acetate-fed MFC without any dissolved electron acceptors. In the coculture MFC of G. sulfurreducens and strain AR20, current generation and acetate degradation were the highest, and the growth of strain AR20 was observed. No current generation, acetate degradation and cell growth occurred in the strain AR20 pure culture MFC. These results show for the first time that G. sulfurreducens can oxidize acetate in syntrophic cooperation with the isolated Hydrogenophaga sp. strain AR20, with electrode as the electron acceptor.

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Section: Syntrophic Acetate-oxidizing Microbes In Mfcsmentioning

confidence: 99%

Acetate oxidation by syntrophic association between Geobacter sulfurreducens and a hydrogen-utilizing exoelectrogen

Kimura

Okabe

2013

The ISME Journal

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“…Except for Spirochaetes the bacterial phyla found here (Bacteroidetes, Firmicutes and Proteobacteria) have been repeatedly identified on bioanodes [42,[51][52][53][54]. After the first 23 days of operation, the three biofilms sampled were dominated by three different orders: Desulfuromonadales for reactor 1, unidentified Bacteroidetes for reactor 2 and Bacteroidales for reactor 3.…”

Section: Microbial Community Analysismentioning

confidence: 64%

Successive bioanode regenerations to maintain efficient current production from biowaste

Bridier

Quéméner

Bureau

et al. 2015

Bioelectrochemistry

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The long-term operation of efficient bioanodes supplied with waste-derived organics is a key challenge for using bioelectrochemical systems as a waste valorization technology. Here, we describe a simple procedure that allowed maintaining highly efficient bioanodes supplied with biowaste. Current densities up to 14.8 A/m(2) were obtained with more than 40% of the electrons introduced as biowaste being recovered in the electrical circuit. Three fed-batch reactors were started at different biowaste loading rates. A decline of coulombic efficiencies between 22 and 31% was recorded depending on the reactor over the first 3 weeks of operation. A renewal procedure of the anode was thereafter implemented, which led to a recovery of initial performances. The second and the third renewal, allowed maintaining stable high level performances with coulombic efficiency of approximately 40% over at least 3 weeks. Electroactive biofilm dynamics were monitored using 16S rRNA-gene amplicon sequencing. Retrieved sequences were dominated by Geobacter sulfurreducens-related reads (37% of total sequences), which proportion however varied along the experiment. Interestingly, sequences affiliated to various Bacteroidetes groups were also abundant, suggesting an adaptation of the anodic biofilm to the degradation of biowaste through metabolic interactions between microbial community members.

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“…It was demonstrated that MFCs could generate electricity from leachate, but the excessive organic residues may decrease Coulombic efficiency (CE), especially in membraneless MFC systems . It was reported that increasing proportions of butyrate and propionate could decrease power density and CE from 1.9 to 1.0 W m -3 and from 34 to 20 %, respectively (Teng et al 2010). Although BES could effective remove organic contaminants in leachate with electricity generation, the study of nutrient removal is very limited.…”

Section: Introductionmentioning

confidence: 99%

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

Qin

2017

Environ. Sci.: Water Res. Technol.

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(academic)Recovering valuable resources from wastewater will transform wastewater management from a treatment focused to sustainability focused strategy, and creates the need for new technology development. An innovative treatment concept -osmotic bioelectrochemical system (OsBES), which is based on cooperation between bioelectrochemical systems (BES) and forward osmosis (FO), has been introduced and studied in the past few years. An OsBES can accomplish simultaneous treatment of wastewater and recovery of resources such as nutrient, energy, and water (NEW). The cooperation can be accomplished in either an integrated (osmotic microbial fuel cells, OsMFC) or coupled (microbial electrolysis cell-forward osmosis system, MEC-FO) configuration.In OsMFC, higher current generation than regular microbial fuel cell (MFC) was observed, resulting from the lower resistance of FO membrane. The electricity generation in OsMFC could greatly inhibit the reverse salt flux. Besides, ammonium removal was successfully demonstrated in OsMFC, making OsMFCs a promising technology for "NEW recovery" (NEW: nutrient, energy and water). For the coupled OsBES, an MEC-FO system was developed. The MEC produced an ammonium bicarbonate draw solute via recovering ammonia from synthetic organic solution, which was then applied in the FO for extracting water from the MEC anode effluent. The system has been advanced with treating landfill leachate. A mathematical model developed for ammonia removal/recovery in BES quantitatively confirmed that the NH4 + ions serve as effective proton shuttles across cation exchange membrane (CEM). Resource Recovery by Osmotic Bioelectrochemical Systems towards Sustainable Wastewater TreatmentMohan Qin Abstract (general audience)Nowadays, wastewater is no longer considered as waste. Instead, it is a pool for different kinds of resources, such as nutrient, energy, and water (NEW). Various technologies were developed to achieve NEW recovery from wastewater. A novel concept, osmotic bioelectrochemical system (OsBES) has been introduced and studied in the past few years. OsBES is based on two technologies: bioelectrochemical systems (BES) and forward osmosis (FO); and the corporation between these two technologies could accomplish simultaneous wastewater treatment and resource recovery. We investigated two kinds of OsBES: one is osmotic microbial fuel cells (OsMFC), and the other is microbial electrolysis cell-forward osmosis system (MEC-FO). For OsMFC, a mathematical model was built to understand the internal resistance, which will affect the current generation according to Om's law (I=U/R). The salt transport across the cation exchange membrane (CEM) is related to the current generation. The ion transport, especially ammonium/ammonia transport, across CEM membrane in BES was modelled, which will help the BES design and operation for ammonia recovery systems. The system performance for wastewater treatment and resource recovery in MEC-FO was fully investigated with both synthetic wastewater and landfill leach...

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Electricity generation from mixed volatile fatty acids using microbial fuel cells

Cited by 84 publications

References 36 publications

Acetate oxidation by syntrophic association between Geobacter sulfurreducens and a hydrogen-utilizing exoelectrogen

Acetate oxidation by syntrophic association between Geobacter sulfurreducens and a hydrogen-utilizing exoelectrogen

Successive bioanode regenerations to maintain efficient current production from biowaste

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

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