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Enhanced alcohol yields in batch cultures ofClostridium acetobutylicumusing a three-electrode potentiometric system with methyl viologen as electron carrier

✍ Scribed by S. Peguin; P. Delorme; G. Goma; P. Soucaille

Publisher: Springer Netherlands
Year: 1994
Tongue: English
Weight: 483 KB
Volume: 16
Category: Article
ISSN: 0141-5492
DOI: 10.1007/bf00134624

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✦ Synopsis

ARY

Batch cultures of Closrridium acetobutylicum at controlled pH values of 5 and 5.5 were carried out in a three-electrode potentiometric system with methyl viologen (1 mM) as electron carrier. Although an irreversible loss of methyl viologen at the electrode surface was observed, a significant increase in alcohol yield was obtained. In comparison to control fermentation with or without methyl viologen addition, the butanol yield improvements were respectively of 7 or 51% at pH 5, and 56 or 467% at pH 5.5.

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✍ Sophie Peguin; Philippe Soucaille 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 777 KB

The metabolism of Clostridium acetobutylicum was manipulated in chemostat culture at pH 5 and 6.5 in a threeelectrode potentiostatic system with methyl viologen (MV) as the electron carrier. When a constant potential was applied at pH 5, the broth redox potential continuously decreased and, simultan