NDLI: Ethanol production from seaweed extract

Content Provider	Springer Nature Link
Author	Horn, S J Aasen, I M
Copyright Year	2000
Abstract	Extracts from Laminaria hyperborea could possibly be fermented to ethanol commercially. In particular, seaweed harvested in the autumn contains high levels of easily extractable laminaran and mannitol. Four microorganisms were tested to carry out this fermentation, one bacterium and three yeasts. Only Pichia angophorae was able to utilise both laminaran and mannitol for ethanol production, and its substrate preferences were investigated in batch and continuous cultures. Laminaran and mannitol were consumed simultaneously, but with different relative rates. In batch fermentations, mannitol was the preferred substrate. Its share of the total laminaran and mannitol consumption rate increased with oxygen transfer rate (OTR) and pH. In continuous fermentations, laminaran was the preferred substrate at low OTR, whereas at higher OTR, laminaran and mannitol were consumed at similar rates. Optimisation of ethanol yield required a low OTR, and the best yield of 0.43 g ethanol (g substrate)−1 was achieved in batch culture at pH 4.5 and 5.8 mmol O2 l−1 h−1. However, industrial production of ethanol from seaweed would require an optimisation of the extraction process to yield a higher ethanol concentration. Journal of Industrial Microbiology & Biotechnology (2000) 25, 249–254.
Starting Page	249
Ending Page	254
Page Count	6
File Format	PDF
ISSN	13675435
Journal	Journal of Industrial Microbiology and Biotechnology
Volume Number	25
Issue Number	5
e-ISSN	14765535
Language	English
Publisher	Nature Publishing Group
Publisher Date	2000-11-01
Publisher Place	London
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article
Subject	Medicine Bioengineering Applied Microbiology and Biotechnology Biotechnology

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