Bioelectrosynthesis of Methane Integrated With Anaerobic Digestion

Buitrón, Germán; Cardeña, René; Arcila, Juan S.

doi:10.1016/b978-0-444-64052-9.00037-6

Cited by 7 publications

(2 citation statements)

References 115 publications

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“…The CH4 is produced by two major pathways: the acetoclastic pathway where approximately two-thirds of the methane is produced, and by CO2 reduction where CO2 reducing methanogens produce the remaining amount of methane. The sulfate content in the vinasse can inhibit methanogenic archaea richness, since the sulfate-reducing bacteria are competing for the carbon sources (Moestedt et al 2013;Buitrón et al 2019). Acetotrophic methanogens convert acetate into biomethane and CO2, where 70% of methane is formed from acetate (Demirbas et al 2006;Demirel and Scherer 2008).…”

Section: Stages and Microorganisms Involved In Methane Productionmentioning

confidence: 99%

Molecular identification of microbial communities in the methane production from vinasse: A review

Ordaz-Díaz

Bailón-Salas

2020

BioRes

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Sugars, starches, and cellulose materials are used for ethanol production. When producing a liter of alcohol, 10 to 15 liters of liquid waste are generated. This waste is called vinasse, and it generates negative impacts on the environment. The process of storing and disposing vinasse in soils generates emissions to the atmosphere, mainly methane. Anaerobic treatment allows for the capture and generation of more biogas, therefore allowing mitigation of the environmental impacts. The microbial diversity present in the anaerobic digestion (AD) of vinasse is strongly related to the efficiency and quality of methane production. The gene 16s rDNA-based molecular techniques have been the most commonly used techniques for monitoring microbial communities present in the digesters. However, the identification is not enough. Rather, it is necessary to know the metagenomic functionality in this type of habitat. This review provides a comprehensive overview of methods to identify the microorganisms in the anaerobic digestion of vinasse. In addition, microbial community identification in vinasse reactors and their relationship with methane production are reviewed.

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Section: Stages and Microorganisms Involved In Methane Productionmentioning

confidence: 99%

Molecular identification of microbial communities in the methane production from vinasse: A review

Ordaz-Díaz

Bailón-Salas

2020

BioRes

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“…The coupling of AD with microbial electrolysis cell systems aims to increase the yield and purity of methane. In this process, there are two routes to produce methane: (1) via electrochemistry, in which CO2 reacts with protons and electrons to be reduced to CH4, and (2) biologically by hydrogenotrophic microorganisms that improve the production rate and yield [7].…”

Section: Introductionmentioning

confidence: 99%

Anaerobic fermentation of cow manure and wheat straw in low voltage electric field

Plume

Dubrovskis

2021

20th International Scientific Conference Engineering for Rural Development Proceedings

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Anaerobic fermentation (AF) is widely implemented technology for energy and organic fertilizer production in more than 50 biogas plants in Latvia. Increasing the efficiency of the anaerobic fermentation process plays an important role in increasing the competitiveness of biogas plants and reducing the state financial support required for the operation of biogas plants. The use of a low-voltage electric field is a promising method for improving the AF process and biogas quality. Experimental investigation of low voltage (0.49-0.75 V) influence on the AF process of cow manure and wheat straw was provided in 16 laboratory bioreactors in volume of 0.75 L in batch mode at temperature 38 ºC. The first group of 7 bioreactors was filled in with inoculums and cow manure and second group of bioreactors was filled in with inoculums and wheat straw. In each group, four bioreactors were arranged with graphite electrodes with wires for connection to a low voltage DC source. Biogas and methane obtainable from inoculums only were investigated in 2 control bioreactors for calculation of biogas obtainable from cow manure and wheat straw only. Anaerobic fermentation process was provided during 68 days until methane emission from bioreactors ceases. Both experimental groups showed an increase in methane production under the influence of a low-voltage electric field. The specific methane production from cow manure increases by 58%, if 0.49 V DC electricity was supplied to bioreactors. The specific methane production from wheat straw decreases by 0.6%, if 0.75 V DC electricity supplied to bioreactors in the second, post-fermentation period only. The effectiveness of usage of the electric field should be investigated further to optimise the electric voltage, form of electrodes and power supply mode.

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Anaerobic Digestion and Electromethanogenesis

Pandit,

Rifat

et al. 2024

Advancements in Bio-Systems and Technologies for Wastewater Treatment

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Bioelectrosynthesis of Methane Integrated With Anaerobic Digestion

Cited by 7 publications

References 115 publications

Molecular identification of microbial communities in the methane production from vinasse: A review

Molecular identification of microbial communities in the methane production from vinasse: A review

Anaerobic fermentation of cow manure and wheat straw in low voltage electric field

Anaerobic Digestion and Electromethanogenesis

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