Clostridia

Bahl, Hubert; Dürre, Peter

doi:10.1002/9783527620821.ch9

Cited by 15 publications

(2 citation statements)

References 209 publications

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“…The Gram-positive bacterium Clostridium acetobutylicum is well known for its ability to produce under certain circumstances the solvents acetone, butan-1-ol, and, in minor amounts, ethanol (Woods 1993;Bahl and Dürre 2001). Until the middle of the last century, the clostridial acetone-butanol-ethanol (ABE) fermentation had been used in industrial-scale fermentation systems, and in total volume, it was only exceeded by ethanol fermentation (Rose 1961).…”

Section: Introductionmentioning

confidence: 99%

Increased productivity of Clostridium acetobutylicum fermentation of acetone, butanol, and ethanol by pervaporation through supported ionic liquid membrane

Izák

Schwarz

Ruth

et al. 2008

Appl Microbiol Biotechnol

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Pervaporation proved to be one of the best methods to remove solvents out of a solvent producing Clostridium acetobutylicum culture. By using an ionic liquid (IL)-polydimethylsiloxane (PDMS) ultrafiltration membrane (pore size 60 nm), we could guarantee high stability and selectivity during all measurements carried out at 37°C. Overall solvent productivity of fermentation connected with continuous product removal by pervaporation was 2.34 g l −1 h −1 . The supported ionic liquid membrane (SILM) was impregnated with 15 wt% of a novel ionic liquid (tetrapropylammonium tetracyano-borate) and 85 wt% of polydimethylsiloxane. Pervaporation, accomplished with the optimized SILM, led to stable and efficient removal of the solvents butan-1-ol and acetone out of a C. acetobutylicum culture. By pervaporation through SILM, we removed more butan-1-ol than C. acetobutylicum was able to produce. Therefore, we added an extra dose of butan-1-ol to run fermentation on limiting values where the bacteria would still be able to survive its lethal concentration (15.82 g/l). After pervaporation was switched off, the bacteria died from high concentration of butan-1-ol, which they produced.

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Section: Introductionmentioning

confidence: 99%

Increased productivity of Clostridium acetobutylicum fermentation of acetone, butanol, and ethanol by pervaporation through supported ionic liquid membrane

Izák

Schwarz

Ruth

et al. 2008

Appl Microbiol Biotechnol

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“…Desde o século vinte até hoje, as bactérias pertencentes a este gênero tem sido investigadas como fonte de novas enzimas para biotransformações, para degradação de biomassa, bem como para a sua habilidade em degradar poluentes e xenobióticos (Schaechter 2009). Porém, a habilidade que mais se destaca nas espécies de Clostridium é a capacidade que estas têm de produzir diferentes ácidos e solventes (Bahl and Dürre 2008), entre eles acetona, etanol e n-butanol, sendo este último, o produto alvo deste projeto. Desta forma, o presente trabalho utiliza bactérias do gênero Clostridium para a produção de n-butanol por via fermentativa.…”

Section: O Gênero Clostridiumunclassified

Otimização da produção de butanol por cepas de Clostridium spp. utilizando hidrolisado lignocelulósico

Magalhães¹

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Bacterial Fermentation

M��ller

2008

Encyclopedia of Life Sciences

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Under anaerobic conditions, in the dark and in the absence of electron acceptors, organic compounds are catabolized by strictly anaerobic or facultatively anaerobic bacteria by internally balanced oxidation–reduction reactions, a process called fermentation. In fermentation, the organic compound serves as both electron donor and acceptor, and adenosine triphosphate is synthesized by substrate‐level phosphorylation.

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Clostridia

Cited by 15 publications

References 209 publications

Increased productivity of Clostridium acetobutylicum fermentation of acetone, butanol, and ethanol by pervaporation through supported ionic liquid membrane

Increased productivity of Clostridium acetobutylicum fermentation of acetone, butanol, and ethanol by pervaporation through supported ionic liquid membrane

Otimização da produção de butanol por cepas de Clostridium spp. utilizando hidrolisado lignocelulósico

Bacterial Fermentation

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