Production of ethanol from mannitol by Zymobacter palmae |
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Authors: | S J Horn I M Aasen K Østgaard |
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Institution: | (1) Department of Biotechnology, The Norwegian University of Science and Technology NTNU, N-7491 Trondheim, Norway, NO;(2) SINTEF Applied Chemistry, N-7465 Trondheim, Norway, NO |
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Abstract: | Extracts from brown seaweeds could possibly be fermented to ethanol, particularly seaweeds harvested in the autumn, which
contain high levels of easily extractable laminaran and mannitol. Few microorganisms are able to utilise mannitol as a substrate
for ethanol production and Zymobacter palmae was tested for this purpose. Bacterial growth as well as ethanol yield depended on the amount of oxygen present. Strictly
anaerobic growth on mannitol was not observed. At excessive aeration, a change in the fermentation pattern was observed with
high production of acetate and propionate. Under oxygen-limiting conditions, the bacteria grew and produced ethanol in a synthetic
mannitol medium with a yield of 0.38 g ethanol (g mannitol)−1. Z. palmae was also successfully applied for fermentation of mannitol from Laminaria hyperborea extracts. Journal of Industrial Microbiology & Biotechnology (2000) 24, 51–57.
Received 27 June 1999/ Accepted in revised form 23 September 1999 |
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Keywords: | : Zymobacter palmae mannitol ethanol biofuel seaweed |
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