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Updated: Jul 4, 2026

Continuous Liquid-Liquid Extraction of Medium-Chain Fatty Acids from Fermentation Broth Using Hollow-Fiber Membranes
Published on: August 9, 2024
Acetonobutylic fermentation: improvement of performances by coupling continuous fermentation and ultrafiltration
1Département de Génie Biochimique et Alimentaire, UA - CNRS - n degrees 544, Institut National des Sciences Appliquées, Avenue de Rangueil, F-31077 Toulouse Cédex.
Abstract:
The technology of coupling ultrafiltration and fermentation has been tested with the acetonobutylic fermentation in continuous mode. The device developed was sterilizable by steam and permitted drastic cleaning of the ultrafiltration (UF) membrane without interrupting the continuous fermentation. It has been shown to be an easily operated and reliable experimental tool for studying high-cell-density cultures and inhibition phenomena. With total recycle of biomass, a dry weight concentration of 125 g/L was attained, which greatly enhanced the volumetric solvent productivity of acetonobutylic fermentation in averaging 4. 5 g/L h for significant periods of time (>70 h) and maintaining solvent concentration and yield at acceptable levels.
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