Abstract
The technical possibilities of the microbial production of acetone, butanol and ethanol (ABE) from potato waste using in-line solvent recovery, are evaluated. Clostridium acetobutylicum DSM 1731 produces up to 20 g·l−1 of solvents when grown on a medium containing 14% (w/v) potato powder. Using a polypropylene perstraction system and a oleyl alcohol/decane mixture as the extractant, the product yield (based on total solvents and potato dry weight) increased from 0.13 g·g−1 to 0.23 g·g−1. The recovery system worked well for 50 h, after which membrane fouling frustrated proper operation. In the second system a microfiltration step was incorporated whereas the solvents were extracted through a hydrophilic membrane using fatty acid methyl esters from sunflower oil as an extractant. This process configuration resulted in a comparable increase of ABE production.
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Correspondence to: G. Eggink
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Grobben, N.G., Eggink, G., Petrus Cuperus, F. et al. Production of acetone, butanol and ethanol (ABE) from potato wastes: fermentation with integrated membrane extraction. Appl Microbiol Biotechnol 39, 494–498 (1993). https://doi.org/10.1007/BF00205039
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DOI: https://doi.org/10.1007/BF00205039