The Potential of Biogas; the Solution to Energy Storage

Villadsen, Sebastian N. B.; Fosbøl, Philip Loldrup; Angelidaki, Irini; Woodley, John M.; Nielsen, Lars; Møller, Per

doi:10.1002/cssc.201900100

Cited by 57 publications

(38 citation statements)

References 40 publications

(74 reference statements)

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“…Biogas consists mainly of CH 4 (40-75%) and CO 2 (25-60%) and needs to be upgraded to biomethane by removing CO 2 if injection into the gas grid is intended. Methods for biogas upgrading have been reviewed elsewhere [5][6][7]. Biological biogas upgrading (biomethanation) uses external H 2 to convert the CO 2 share of the biogas into additional CH 4 via the CO 2 -reductive pathway of hydrogenotrophic methanogens.…”

Section: Introductionmentioning

confidence: 99%

Microbial Resource Management for Ex Situ Biomethanation of Hydrogen at Alkaline pH

et al. 2020

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Biomethanation is a promising solution to convert H2 (produced from surplus electricity) and CO2 to CH4 by using hydrogenotrophic methanogens. In ex situ biomethanation with mixed cultures, homoacetogens and methanogens compete for H2/CO2. We enriched a hydrogenotrophic microbiota on CO2 and H2 as sole carbon and energy sources, respectively, to investigate these competing reactions. The microbial community structure and dynamics of bacteria and methanogenic archaea were evaluated through 16S rRNA and mcrA gene amplicon sequencing, respectively. Hydrogenotrophic methanogens and homoacetogens were enriched, as acetate was concomitantly produced alongside CH4. By controlling the media composition, especially changing the reducing agent, the formation of acetate was lowered and grid quality CH4 (≥97%) was obtained. Formate was identified as an intermediate that was produced and consumed during the bioprocess. Stirring intensities ≥ 1000 rpm were detrimental, probably due to shear force stress. The predominating methanogens belonged to the genera Methanobacterium and Methanoculleus. The bacterial community was dominated by Lutispora. The methanogenic community was stable, whereas the bacterial community was more dynamic. Our results suggest that hydrogenotrophic communities can be steered towards the selective production of CH4 from H2/CO2 by adapting the media composition, the reducing agent and the stirring intensity.

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Section: Introductionmentioning

confidence: 99%

Microbial Resource Management for Ex Situ Biomethanation of Hydrogen at Alkaline pH

et al. 2020

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“…Here, only processes linked to fermentative conversion routes are mentioned. Excess electricity can be used to electrochemically convert CO 2 into methanol or formate (Fig. , K), which then can be used as a substrate for fermentation (Fig.…”

Section: Advantages Of An Extended Network Of Process Routes For Gas mentioning

confidence: 99%

Gas Fermentation Expands the Scope of a Process Network for Material Conversion

Geinitz

Hüser

Mann

et al. 2020

Chemie Ingenieur Technik

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Biotechnological fermentation is a well-established process, however, it is far from being fully understood and exploited. A new area of fermentation technology that has evolved over the recent decades is gas fermentation. Many microorganisms have been reported in literature to be capable of utilizing a variety of gases such as CO, CO 2 , H 2 , and CH 4 under anaerobic or aerobic conditions as their main carbon and/or energy source. Mostly waste stream gases from industrial plants or those that can be produced via the gasification of solids are investigated. This review focuses on the currently available scientific knowledge about gas fermentation processes, particularly anaerobic syngas fermentation and aerobic methane fermentation. Gas fermentation processes are compared with aerobic and anaerobic fermentation processes based on dissolved solid substrates. Also, the potential of gas fermentation when integrated into a biotechnological network of processes is outlined.

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“…Biogas-a renewable fuel-is generated from anaerobic breakdown of various biological feedstocks through synergistic metabolic activities of hydrolytic, acidogenic, and methanogenic microorganisms (Kaur and Phutela, 2016;Sheets et al, 2017). Biogas consists of around 60% methane (CH4), 40% carbon dioxide (CO2), and around 2000 ppm hydrogen sulphide (H2S) as the main impurity (Villadsen et al, 2019). Capturing methane in the biogas production process contributes positively to reduction of CH4 emissions and also the captured methane could be used as a renewable energy source to all applications designed for natural gas (Atelge et al, 2018;Kapdi et al, 2005;Noorollahi et al, 2015).…”

Section: Biogas Generationmentioning

confidence: 99%

Comparative review of three approaches to biofuel production from energy crops as feedstock in a developing country

Nikkhah

Assad

Rosentrater

et al. 2020

Bioresource Technology Reports

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This study is a comparative evaluation of three approaches to biofuel production from energy crops including biogas, bioethanol and biodiesel to ascertain which one is the most effective and more energy-efficient than the others. Moreover, the potential of biofuel production from the best option was studied. For this purpose, biogas generation from corn silage, bioethanol generation from corn, and biodiesel production from peanuts in Iran (as a case study) were studied. The results revealed that 10,683.36 m 3 of biogas, 2.53 m 3 of bioethanol and 0.70 m 3 of biodiesel could be produced per each hectare of energy crops. The total greenhouse gas emissions for each MJ energy generation of biogas, bioethanol and biodiesel were 0.01, 0.04 and 0.03 kgCO2eq, respectively. Accordingly, the total annual biogas potential from corn silage (as the best option) in Iran is 3,953.74 million m 3 , which is equivalent to 1515.94 million barrels of oil.

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The Potential of Biogas; the Solution to Energy Storage

Abstract: To day,b iogas upgrading referst ot he process of extracting CH 4 (biomethane) from biogas. [11,12] This process is necessary to make biogass uitable as af uel for vehicles or injection into the [a] S.

Cited by 57 publications

References 40 publications

Microbial Resource Management for Ex Situ Biomethanation of Hydrogen at Alkaline pH

Microbial Resource Management for Ex Situ Biomethanation of Hydrogen at Alkaline pH

Gas Fermentation Expands the Scope of a Process Network for Material Conversion

Comparative review of three approaches to biofuel production from energy crops as feedstock in a developing country

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