Effect of Organic Nitrogen Supplements on Syngas Fermentation Using Clostridium autoethanogenum

Im, Hongrae; An, Taegwang; Kwon, Rokgyu; Park, Soeun; Kim, Sang Hyun

doi:10.1007/s12257-020-0221-4

Cited by 12 publications

(11 citation statements)

References 27 publications

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“…61 Organic nitrogen sources such as tryptone and peptone help in the synthesis of core proteins during metabolite production and enhancement of carbon uptake. 62 Amino acids are building blocks of different metalloenzymes and proteins in the Wood-Ljungdahl pathway.…”

Section: Medium Compositionmentioning

confidence: 99%

Syngas conversion to biofuels and biochemicals: a review of process engineering and mechanisms

Khalid,

Amin,

Gao

et al. 2024

Sustainable Energy Fuels

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Section: Medium Compositionmentioning

confidence: 99%

Syngas conversion to biofuels and biochemicals: a review of process engineering and mechanisms

Khalid,

Amin,

Gao

et al. 2024

Sustainable Energy Fuels

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“…Furthermore, nutrients like salts, trace elements, vitamins and reducing agents have high impact on microbial growth and product formation. Reviews on the influence of medium composition and medium costs as well as further experimental studies can be found elsewhere [85,86,165,173,180,181,184,[186][187][188][189][190][191][192][193].…”

Section: Operating Conditionsmentioning

confidence: 99%

CO_xFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

Perret

Campos

Delgado

et al. 2022

Chemie Ingenieur Technik

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Heterogeneous catalysis and anaerobic syngas fermentation represent two different approaches for the conversion of synthesis gas into chemicals and fuels. This review provides a unique comparison of different reaction paths for the fixation of CO 2 , CO and H 2 into elementary building blocks such as methanol, acetic acid and ethanol. Operating conditions, reactor engineering, influence of gas impurities, yields, conversion efficiencies as well as downstream product recovery are compared. It was found that mass-specific productivity ranges in the same order of magnitude for both technologies, while space-time yield of heterogeneous catalysis is up to three orders of magnitude higher.

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“…Acetogens produce acetyl-CoA from syngas via the Wood–Ljungdahl pathway. Representative acetogens include Acetobacterium woodii ( Weghoff et al, 2015 ), Clostridium aceticum ( Poehlein et al, 2015 ), Clostridium autoethanogenum ( Im et al, 2021 ), and Clostridium ljungdahlii ( Köpke et al, 2010 ). Although acetogen strains mainly produce C2 compounds (acetate and ethanol) from syngas, they are also known to produce C4–C6 acids and alcohols ( Charubin et al, 2018 ; Bao et al, 2019 ; Im et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…Representative acetogens include Acetobacterium woodii ( Weghoff et al, 2015 ), Clostridium aceticum ( Poehlein et al, 2015 ), Clostridium autoethanogenum ( Im et al, 2021 ), and Clostridium ljungdahlii ( Köpke et al, 2010 ). Although acetogen strains mainly produce C2 compounds (acetate and ethanol) from syngas, they are also known to produce C4–C6 acids and alcohols ( Charubin et al, 2018 ; Bao et al, 2019 ; Im et al, 2021 ). Among them, C. carboxidivorans P7 ( Phillips et al, 2015 ) and C. ragsdalei ( Ramachandriya et al, 2013 ) were reported to produce 0.94 and 0.09 g/L of hexanol, respectively, from syngas.…”

Section: Introductionmentioning

confidence: 99%

Production of Hexanol as the Main Product Through Syngas Fermentation by Clostridium carboxidivorans P7

Gong

et al. 2022

Front. Bioeng. Biotechnol.

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The production of hexanol from syngas by acetogens has gained attention as a replacement for petroleum-derived hexanol, which is widely used in the chemical synthesis and plastic industries. However, acetogenic bacteria generally produce C2 compounds (e.g., acetate and ethanol) as the main products. In this study, the gas fermentation conditions favorable for hexanol production were investigated at different temperatures (30–37°C) and CO gas contents (30–70%) in batch gas fermentation. Hexanol production increased from 0.02 to 0.09 g/L when the cultivation temperature was lowered from 37 to 30°C. As the CO content increased from 30 to 70%, the CO consumption rate and hexanol production (yield, titer, and ratio of C6 compound to total products) increased with the CO content. When 70% CO gas was repeatedly provided by flushing the headspace of the bottles at 30°C, the total alcohol production increased to 4.32 g/L at the expense of acids. Notably, hexanol production (1.90 g/L) was higher than that of ethanol (1.20 g/L) and butanol (1.20 g/L); this is the highest level of hexanol produced in gas fermentation to date and the first report of hexanol as the main product. Hexanol production was further enhanced to 2.34 g/L when 2 g/L ethanol was supplemented at the beginning of 70% CO gas refeeding fermentation. Particularly, hexanol productivity was significantly enhanced to 0.18 g/L/day while the supplemented ethanol was consumed, indicating that the conversion of ethanol to acetyl-CoA and reducing equivalents positively affected hexanol production. These optimized culture conditions (gas fermentation at 30°C and refeeding with 70% CO gas) and ethanol supplementation provide an effective and sustainable approach for bio-hexanol production.

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Effect of Organic Nitrogen Supplements on Syngas Fermentation Using Clostridium autoethanogenum

Cited by 12 publications

References 27 publications

Syngas conversion to biofuels and biochemicals: a review of process engineering and mechanisms

Syngas conversion to biofuels and biochemicals: a review of process engineering and mechanisms

CO_xFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

Production of Hexanol as the Main Product Through Syngas Fermentation by Clostridium carboxidivorans P7

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Effect of Organic Nitrogen Supplements on Syngas Fermentation Using Clostridium autoethanogenum

Cited by 12 publications

References 27 publications

Syngas conversion to biofuels and biochemicals: a review of process engineering and mechanisms

Syngas conversion to biofuels and biochemicals: a review of process engineering and mechanisms

COxFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis

Production of Hexanol as the Main Product Through Syngas Fermentation by Clostridium carboxidivorans P7

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Product

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CO_xFixation to Elementary Building Blocks: Anaerobic Syngas Fermentation vs. Chemical Catalysis