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Production of bioethanol from organic whey using Kluyveromyces marxianus

Christensen, Anne Deen; Kádár, Zsófia; Oleskowicz-Popiel, Piotr and Thomsen, Mette Hedegaard (2010) Production of bioethanol from organic whey using Kluyveromyces marxianus. Journal of Industrial Microbioology and Biotechnology, 38, pp. 283-289.

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Summary

Ethanol production by K. marxianus in whey from organic cheese production was examined in batch and continuous mode. The results showed that no pasteurization or freezing of the whey was necessary and that K. marxianus was able to compete with the lactic acid bacteria added during cheese production. The results also showed that, even though some lactic acid fermentation had taken place prior to ethanol fermentation, K. marxianus was able to take over and produce ethanol from the remaining lactose, since a significant amount of lactic acid was not produced (1–2 g/l). Batch fermentations showed high ethanol yield (*0.50 g ethanol/g lactose) at both 30ºC and 40ºC using low pH (4.5) or no pH control. Continuous fermentation of nonsterilized whey was performed using Ca-alginate-immobilized K. marxianus. High ethanol productivity (2.5–4.5 g/l/h) was achieved at dilution rate of 0.2/h, and it was concluded that K. marxianus is very suitable for industrial ethanol production from whey.


EPrint Type:Journal paper
Subjects: Crop husbandry > Post harvest management and techniques
Research affiliation: Denmark > DARCOF III (2005-2010) > BIOCONCENS - Biomass and bio-energy production in organic agriculture
Deposited By: Kádár, Zsófia
ID Code:19014
Deposited On:30 Jun 2011 10:33
Last Modified:28 Apr 2013 09:13
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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