Temporary addition of carbon fibers facilitates methanogenic degradation of ethanol during anaerobic treatment

Du, Jin; Gu, Mengqi; Yin, Qidong; Wu, Guangxue

doi:10.1016/j.scitotenv.2020.142724

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…When using propionate and butyrate as co-substrates, tha addition of carbon fiber can increase the methane production rate by 6.7 times; in this process, carbon fiber can act as an electronic conduit, rather than producing conductive fimbriae or cytochrome to participate in DIET [38]. Similar findings were reported in an experiment which used ethanol as the substrate; here, the maximum methane production rate was shown to increase by 40% [39]. Thus, it has been speculated that methanogenic bacteria may produce methane by directly receiving electrons from microorganisms such as Geobacter.…”

Section: Carbon Fibersupporting

confidence: 81%

Enhanced Anaerobic Digestion Using Conductive Materials through Mediation of Direct Microbial Interspecies Electron Transfer: A Review

Kong,

Zhang

2023

Fermentation

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The anaerobic digestion (AD) of organic matter is susceptible to the challenges posed by low-speed electron transfer between microorganisms and the limitation of low hydrogen partial pressure, resulting in low methane recovery efficiency and poor system stability. Numerous studies in recent years have shown that a variety of conductive materials can significantly increase the interspecies electron transfer (IET) rate, optimize the structure and function of anaerobic microbial communities, improve methane yield, and promote system stability by mediating the direct interspecies electron transfer (DIET) of reciprocal microorganisms. In this study, on the basis of investigating the IET mechanism of methanogenic microorganisms in the AD of organic matter, the effects of carbon-based conductive materials (activated carbon, biochar, carbon cloth, carbon fiber, graphite, graphite felt, graphene, and carbon nanotubes) and iron-based conductive materials (magnetite, Fe3O4, hematite, Fe2O3, goethite, and zero-valent iron) on AD performance and microbial community using DIET are reviewed. Future research should focus on establishing an evaluation system, identifying flora with DIET potential, and finding methods for engineering applications that increase recovery efficiency and reveal the principle of conductive materials to mediate DIET.

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Section: Carbon Fibersupporting

confidence: 81%

Enhanced Anaerobic Digestion Using Conductive Materials through Mediation of Direct Microbial Interspecies Electron Transfer: A Review

Kong,

Zhang

2023

Fermentation

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“…The relative abundance of Syntrophobacter increased from 0.56% (raw AnGS) to 2.65% in MB-EGS, while it decreased to 0.18% in control EGS. Syntrophobacter is known to be involved in the conversion of propionate to acetate, H2 and CO2, and can perform syntrophic interactions with Geobacter species via direct interspecies electron transfer 40,41 . However, in the MB-EGS system, the carbon source only contained acetate and MB.…”

Section: Coordinated Response Of Microorganisms In Egs Under Mb Stimu...mentioning

confidence: 99%

Extracellular electron transfer in electroactive anaerobic granular sludge mediated by the phenothiazine derivative

Liu

Zhang

et al. 2022

Journal of Power Sources

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“…and Methanothrix spp. (Tang et al, 2020;Du et al, 2020). A study showed that CNTs promoted acetoclastic methanogenesis (Xiao et al, 2020b).…”

Section: Cnts Served As Structural Proteinsmentioning

confidence: 99%

Proteomics reveal biomethane production process induced by carbon nanotube

Liu

et al. 2021

Environmental Research

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Temporary addition of carbon fibers facilitates methanogenic degradation of ethanol during anaerobic treatment

Cited by 7 publications

References 40 publications

Enhanced Anaerobic Digestion Using Conductive Materials through Mediation of Direct Microbial Interspecies Electron Transfer: A Review

Enhanced Anaerobic Digestion Using Conductive Materials through Mediation of Direct Microbial Interspecies Electron Transfer: A Review

Extracellular electron transfer in electroactive anaerobic granular sludge mediated by the phenothiazine derivative

Proteomics reveal biomethane production process induced by carbon nanotube

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